OGL renderer

src/core/hle/service/gsp_gpu.cpp

@@ -15,6 +15,7 @@
 #include "core/hw/lcd.h"
 
 #include "video_core/gpu_debugger.h"
+#include "video_core/video_core.h"
 
 // Main graphics debugger object - TODO: Here is probably not the best place for this
 GraphicsDebugger g_debugger;
@@ -264,6 +265,8 @@ static void FlushDataCache(Service::Interface* self) {
     u32 size    = cmd_buff[2];
     u32 process = cmd_buff[4];
 
+    VideoCore::g_renderer->hw_rasterizer->NotifyFlush(Memory::VirtualToPhysicalAddress(address), size);
+
     // TODO(purpasmart96): Verify return header on HW
 
     cmd_buff[1] = RESULT_SUCCESS.raw; // No error
@@ -352,10 +355,16 @@ static void ExecuteCommand(const Command& command, u32 thread_id) {
 
     // GX request DMA - typically used for copying memory from GSP heap to VRAM
     case CommandId::REQUEST_DMA:
+        VideoCore::g_renderer->hw_rasterizer->NotifyPreCopy(Memory::VirtualToPhysicalAddress(command.dma_request.source_address),
+                                                           command.dma_request.size);
+
         memcpy(Memory::GetPointer(command.dma_request.dest_address),
                Memory::GetPointer(command.dma_request.source_address),
                command.dma_request.size);
         SignalInterrupt(InterruptId::DMA);
+
+        VideoCore::g_renderer->hw_rasterizer->NotifyFlush(Memory::VirtualToPhysicalAddress(command.dma_request.dest_address), command.dma_request.size);
+
         break;
 
     // ctrulib homebrew sends all relevant command list data with this command,

src/core/hw/gpu.cpp

@@ -106,6 +106,8 @@ inline void Write(u32 addr, const T data) {
             } else {
                 GSP_GPU::SignalInterrupt(GSP_GPU::InterruptId::PSC1);
             }
+
+            VideoCore::g_renderer->hw_rasterizer->NotifyFlush(config.GetStartAddress(), config.GetEndAddress() - config.GetStartAddress());
         }
         break;
     }
@@ -129,6 +131,11 @@ inline void Write(u32 addr, const T data) {
             u32 output_width = config.output_width / horizontal_scale;
             u32 output_height = config.output_height / vertical_scale;
 
+            u32 input_size = config.input_height.Value() * config.input_width.Value() * GPU::Regs::BytesPerPixel(config.input_format.Value());
+            u32 output_size = output_height * output_width * GPU::Regs::BytesPerPixel(config.output_format.Value());
+
+            VideoCore::g_renderer->hw_rasterizer->NotifyPreCopy(config.GetPhysicalInputAddress(), input_size);
+
             if (config.raw_copy) {
                 // Raw copies do not perform color conversion nor tiled->linear / linear->tiled conversions
                 // TODO(Subv): Verify if raw copies perform scaling
@@ -142,6 +149,9 @@ inline void Write(u32 addr, const T data) {
                     config.output_format.Value(), config.flags);
 
                 GSP_GPU::SignalInterrupt(GSP_GPU::InterruptId::PPF);
+
+                VideoCore::g_renderer->hw_rasterizer->NotifyFlush(config.GetPhysicalOutputAddress(), output_size);
+
                 break;
             }
 
@@ -247,6 +257,8 @@ inline void Write(u32 addr, const T data) {
                       config.output_format.Value(), config.flags);
 
             GSP_GPU::SignalInterrupt(GSP_GPU::InterruptId::PPF);
+
+            VideoCore::g_renderer->hw_rasterizer->NotifyFlush(config.GetPhysicalOutputAddress(), output_size);
         }
         break;
     }

src/video_core/CMakeLists.txt

@@ -1,7 +1,11 @@
 set(SRCS
             renderer_opengl/generated/gl_3_2_core.c
+            renderer_opengl/gl_rasterizer.cpp
+            renderer_opengl/gl_rasterizer_cache.cpp
             renderer_opengl/renderer_opengl.cpp
+            renderer_opengl/gl_resource_manager.cpp
             renderer_opengl/gl_shader_util.cpp
+            renderer_opengl/gl_state.cpp
             debug_utils/debug_utils.cpp
             clipper.cpp
             command_processor.cpp
@@ -15,13 +19,19 @@ set(SRCS
 set(HEADERS
             debug_utils/debug_utils.h
             renderer_opengl/generated/gl_3_2_core.h
+            renderer_opengl/gl_pica_to_gl.h
+            renderer_opengl/gl_rasterizer.h
+            renderer_opengl/gl_rasterizer_cache.h
+            renderer_opengl/gl_resource_manager.h
             renderer_opengl/gl_shader_util.h
             renderer_opengl/gl_shaders.h
+            renderer_opengl/gl_state.h
             renderer_opengl/renderer_opengl.h
             clipper.h
             color.h
             command_processor.h
             gpu_debugger.h
+            hwrasterizer_base.h
             math.h
             pica.h
             primitive_assembly.h

src/video_core/command_processor.cpp

@@ -12,8 +12,10 @@
 #include "pica.h"
 #include "primitive_assembly.h"
 #include "vertex_shader.h"
+#include "video_core.h"
 #include "core/hle/service/gsp_gpu.h"
 #include "core/hw/gpu.h"
+#include "core/settings.h"
 
 #include "debug_utils/debug_utils.h"
 
@@ -107,7 +109,7 @@ static inline void WritePicaReg(u32 id, u32 value, u32 mask) {
             bool index_u16 = index_info.format != 0;
 
             DebugUtils::GeometryDumper geometry_dumper;
-            PrimitiveAssembler<VertexShader::OutputVertex> clipper_primitive_assembler(registers.triangle_topology.Value());
+            PrimitiveAssembler<VertexShader::OutputVertex> primitive_assembler(registers.triangle_topology.Value());
             PrimitiveAssembler<DebugUtils::GeometryDumper::Vertex> dumping_primitive_assembler(registers.triangle_topology.Value());
 
             for (unsigned int index = 0; index < registers.num_vertices; ++index)
@@ -185,9 +187,25 @@ static inline void WritePicaReg(u32 id, u32 value, u32 mask) {
                     // TODO: Add processed vertex to vertex cache!
                 }
 
+                if (Settings::values.use_hw_renderer) {
+                    // Send to hardware renderer
+                    static auto AddHWTriangle = [](const Pica::VertexShader::OutputVertex& v0,
+                                                   const Pica::VertexShader::OutputVertex& v1,
+                                                   const Pica::VertexShader::OutputVertex& v2) {
+                        VideoCore::g_renderer->hw_rasterizer->AddTriangle(v0, v1, v2);
+                    };
+                    
+                    primitive_assembler.SubmitVertex(output, AddHWTriangle);
+                } else {
                     // Send to triangle clipper
-                clipper_primitive_assembler.SubmitVertex(output, Clipper::ProcessTriangle);
+                    primitive_assembler.SubmitVertex(output, Clipper::ProcessTriangle);
                 }
+            }
+
+            if (Settings::values.use_hw_renderer) {
+                VideoCore::g_renderer->hw_rasterizer->DrawTriangles();
+            }
+
             geometry_dumper.Dump();
 
             if (g_debug_context)

src/video_core/hwrasterizer_base.h

@@ -0,0 +1,34 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/emu_window.h"
+#include "video_core/vertex_shader.h"
+
+class HWRasterizer {
+public:
+    virtual ~HWRasterizer() {
+    }
+
+    /// Initialize API-specific GPU objects
+    virtual void InitObjects() = 0;
+
+    /// Set the window (context) to draw with
+    virtual void SetWindow(EmuWindow* window) = 0;
+
+    /// Converts the triangle verts to hardware data format and adds them to the current batch
+    virtual void AddTriangle(const Pica::VertexShader::OutputVertex& v0,
+                             const Pica::VertexShader::OutputVertex& v1,
+                             const Pica::VertexShader::OutputVertex& v2) = 0;
+
+    /// Draw the current batch of triangles
+    virtual void DrawTriangles() = 0;
+
+    /// Notify rasterizer that a copy within 3ds memory will occur after this notification
+    virtual void NotifyPreCopy(u32 src_paddr, u32 size) = 0;
+
+    /// Notify rasterizer that a 3ds memory region has been changed
+    virtual void NotifyFlush(u32 paddr, u32 size) = 0;
+};

src/video_core/renderer_base.h

@@ -6,6 +6,8 @@
 
 #include "common/common_types.h"
 
+#include "video_core/hwrasterizer_base.h"
+
 class RendererBase : NonCopyable {
 public:
 
@@ -48,6 +50,8 @@ public:
         return m_current_frame;
     }
 
+    HWRasterizer *hw_rasterizer;
+
 protected:
     f32 m_current_fps;              ///< Current framerate, should be set by the renderer
     int m_current_frame;            ///< Current frame, should be set by the renderer

src/video_core/renderer_opengl/gl_pica_to_gl.h

@@ -0,0 +1,93 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+#include "video_core/pica.h"
+
+#include "generated/gl_3_2_core.h"
+
+namespace PicaToGL {
+
+static GLenum WrapMode(Pica::Regs::TextureConfig::WrapMode mode) {
+    switch (mode) {
+    case Pica::Regs::TextureConfig::WrapMode::ClampToEdge:
+        return GL_CLAMP_TO_EDGE;
+    case Pica::Regs::TextureConfig::WrapMode::Repeat:
+        return GL_REPEAT;
+    case Pica::Regs::TextureConfig::WrapMode::MirroredRepeat:
+        return GL_MIRRORED_REPEAT;
+    default:
+        LOG_ERROR(Render_OpenGL, "Unknown texture wrap mode %d", mode);
+        return GL_CLAMP_TO_EDGE;
+    }
+}
+
+static GLenum BlendFunc(u32 factor)
+{
+    switch (factor) {
+    case Pica::registers.output_merger.alpha_blending.Zero:
+        return GL_ZERO;
+    case Pica::registers.output_merger.alpha_blending.One:
+        return GL_ONE;
+    case Pica::registers.output_merger.alpha_blending.SourceColor:
+        return GL_SRC_COLOR;
+    case Pica::registers.output_merger.alpha_blending.OneMinusSourceColor:
+        return GL_ONE_MINUS_SRC_COLOR;
+    case Pica::registers.output_merger.alpha_blending.DestColor:
+        return GL_DST_COLOR;
+    case Pica::registers.output_merger.alpha_blending.OneMinusDestColor:
+        return GL_ONE_MINUS_DST_COLOR;
+    case Pica::registers.output_merger.alpha_blending.SourceAlpha:
+        return GL_SRC_ALPHA;
+    case Pica::registers.output_merger.alpha_blending.OneMinusSourceAlpha:
+        return GL_ONE_MINUS_SRC_ALPHA;
+    case Pica::registers.output_merger.alpha_blending.DestAlpha:
+        return GL_DST_ALPHA;
+    case Pica::registers.output_merger.alpha_blending.OneMinusDestAlpha:
+        return GL_ONE_MINUS_DST_ALPHA;
+    case Pica::registers.output_merger.alpha_blending.ConstantColor:
+        return GL_CONSTANT_COLOR;
+    case Pica::registers.output_merger.alpha_blending.OneMinusConstantColor:
+        return GL_ONE_MINUS_CONSTANT_COLOR;
+    case Pica::registers.output_merger.alpha_blending.ConstantAlpha:
+        return GL_CONSTANT_ALPHA;
+    case Pica::registers.output_merger.alpha_blending.OneMinusConstantAlpha:
+        return GL_ONE_MINUS_CONSTANT_ALPHA;
+    case Pica::registers.output_merger.alpha_blending.SourceAlphaSaturate:
+        return GL_SRC_ALPHA_SATURATE;
+    default:
+        LOG_ERROR(Render_OpenGL, "Unknown blend factor %d", factor);
+        return GL_ONE;
+    }
+}
+
+static GLenum CompareFunc(u32 func)
+{
+    switch (func) {
+    case Pica::registers.output_merger.Never:
+        return GL_NEVER;
+    case Pica::registers.output_merger.Always:
+        return GL_ALWAYS;
+    case Pica::registers.output_merger.Equal:
+        return GL_EQUAL;
+    case Pica::registers.output_merger.NotEqual:
+        return GL_NOTEQUAL;
+    case Pica::registers.output_merger.LessThan:
+        return GL_LESS;
+    case Pica::registers.output_merger.LessThanOrEqual:
+        return GL_LEQUAL;
+    case Pica::registers.output_merger.GreaterThan:
+        return GL_GREATER;
+    case Pica::registers.output_merger.GreaterThanOrEqual:
+        return GL_GEQUAL;
+    default:
+        LOG_ERROR(Render_OpenGL, "Unknown compare function %d", func);
+        return GL_ALWAYS;
+    }
+}
+
+} // namespace

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -0,0 +1,730 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/settings.h"
+#include "core/hw/gpu.h"
+
+#include "video_core/color.h"
+#include "video_core/pica.h"
+#include "video_core/utils.h"
+#include "video_core/renderer_opengl/gl_pica_to_gl.h"
+#include "video_core/renderer_opengl/gl_rasterizer.h"
+#include "video_core/renderer_opengl/gl_shaders.h"
+#include "video_core/renderer_opengl/gl_shader_util.h"
+
+#include "generated/gl_3_2_core.h"
+
+#include <memory>
+
+u32 ColorFormatBytesPerPixel(u32 format) {
+    switch (format) {
+    case Pica::registers.framebuffer.RGBA8:
+        return 4;
+    case Pica::registers.framebuffer.RGB8:
+        return 3;
+    case Pica::registers.framebuffer.RGB5A1:
+    case Pica::registers.framebuffer.RGB565:
+    case Pica::registers.framebuffer.RGBA4:
+        return 2;
+    default:
+        UNIMPLEMENTED();
+        break;
+    }
+
+    return 0;
+}
+
+RasterizerOpenGL::RasterizerOpenGL() : last_fb_color_addr(-1), last_fb_depth_addr(-1) {
+
+}
+
+RasterizerOpenGL::~RasterizerOpenGL() {
+    // Set context for automatic resource destruction
+    render_window->MakeCurrent();
+}
+
+/// Initialize API-specific GPU objects
+void RasterizerOpenGL::InitObjects() {
+    // Create the hardware shader program and get attrib/uniform locations
+    shader.Create(GLShaders::g_vertex_shader_hw, GLShaders::g_fragment_shader_hw);
+    attrib_position = glGetAttribLocation(shader.GetHandle(), "vert_position");
+    attrib_color = glGetAttribLocation(shader.GetHandle(), "vert_color");
+    attrib_texcoords = glGetAttribLocation(shader.GetHandle(), "vert_texcoords");
+
+    uniform_alphatest_func = glGetUniformLocation(shader.GetHandle(), "alphatest_func");
+    uniform_alphatest_ref = glGetUniformLocation(shader.GetHandle(), "alphatest_ref");
+
+    uniform_tex = glGetUniformLocation(shader.GetHandle(), "tex");
+
+    for (int i = 0; i < 6; i++) {
+        auto& uniform_tev = uniform_tev_cfgs[i];
+
+        std::string tev_ref_str = "tev_cfgs[" + std::to_string(i) + "]";
+        uniform_tev.color_sources = glGetUniformLocation(shader.GetHandle(), (tev_ref_str + ".color_sources").c_str());
+        uniform_tev.alpha_sources = glGetUniformLocation(shader.GetHandle(), (tev_ref_str + ".alpha_sources").c_str());
+        uniform_tev.color_modifiers = glGetUniformLocation(shader.GetHandle(), (tev_ref_str + ".color_modifiers").c_str());
+        uniform_tev.alpha_modifiers = glGetUniformLocation(shader.GetHandle(), (tev_ref_str + ".alpha_modifiers").c_str());
+        uniform_tev.color_alpha_op = glGetUniformLocation(shader.GetHandle(), (tev_ref_str + ".color_alpha_op").c_str());
+        uniform_tev.color_alpha_multiplier = glGetUniformLocation(shader.GetHandle(), (tev_ref_str + ".color_alpha_multiplier").c_str());
+        uniform_tev.const_color = glGetUniformLocation(shader.GetHandle(), (tev_ref_str + ".const_color").c_str());
+        uniform_tev.updates_combiner_buffer_color_alpha = glGetUniformLocation(shader.GetHandle(), (tev_ref_str + ".updates_combiner_buffer_color_alpha").c_str());
+    }
+
+    uniform_out_maps = glGetUniformLocation(shader.GetHandle(), "out_maps");
+
+    // Generate VBO and VAO
+    vertex_buffer.Create();
+    vertex_array.Create();
+
+    // Update OpenGL state
+    state.draw.vertex_array = vertex_array.GetHandle();
+    state.draw.vertex_buffer = vertex_buffer.GetHandle();
+    state.draw.shader_program = shader.GetHandle();
+
+    for (int i = 0; i < 3; i++) {
+        state.texture_unit[i].enabled_2d = true;
+    }
+
+    state.Apply();
+
+    // Set the texture samplers to correspond to different texture units
+    glUniform1i(uniform_tex, 0);
+    glUniform1i(uniform_tex + 1, 1);
+    glUniform1i(uniform_tex + 2, 2);
+
+    // Set vertex attributes
+    glVertexAttribPointer(attrib_position, 4, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, position));
+    glVertexAttribPointer(attrib_color, 4, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, color));
+    glVertexAttribPointer(attrib_texcoords, 2, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, tex_coord0));
+    glVertexAttribPointer(attrib_texcoords + 1, 2, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, tex_coord1));
+    glVertexAttribPointer(attrib_texcoords + 2, 2, GL_FLOAT, GL_FALSE, sizeof(HardwareVertex), (GLvoid*)offsetof(HardwareVertex, tex_coord2));
+    glEnableVertexAttribArray(attrib_position);
+    glEnableVertexAttribArray(attrib_color);
+    glEnableVertexAttribArray(attrib_texcoords);
+    glEnableVertexAttribArray(attrib_texcoords + 1);
+    glEnableVertexAttribArray(attrib_texcoords + 2);
+
+    // Create textures for OGL framebuffer that will be rendered to, initially 1x1 to succeed in framebuffer creation
+    fb_color_texture.texture.Create();
+    ReconfigColorTexture(fb_color_texture, Pica::registers.framebuffer.RGBA8, 1, 1);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+    fb_depth_texture.texture.Create();
+    ReconfigDepthTexture(fb_depth_texture, Pica::Regs::DepthFormat::D16, 1, 1);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_NONE);
+
+    // Configure OpenGL framebuffer
+    framebuffer.Create();
+
+    state.draw.framebuffer = framebuffer.GetHandle();
+    state.texture_unit[0].enabled_2d = true;
+    state.texture_unit[0].texture_2d = 0;
+    state.Apply();
+
+    glActiveTexture(GL_TEXTURE0);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, fb_color_texture.texture.GetHandle(), 0);
+    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, fb_depth_texture.texture.GetHandle(), 0);
+
+    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
+        LOG_ERROR(Render_OpenGL, "Framebuffer setup failed, status %X", glCheckFramebufferStatus(GL_FRAMEBUFFER));
+    }
+}
+
+/// Set the window (context) to draw with
+void RasterizerOpenGL::SetWindow(EmuWindow* window) {
+    render_window = window;
+}
+
+/// Converts the triangle verts to hardware data format and adds them to the current batch
+void RasterizerOpenGL::AddTriangle(const Pica::VertexShader::OutputVertex& v0,
+                                   const Pica::VertexShader::OutputVertex& v1,
+                                   const Pica::VertexShader::OutputVertex& v2) {
+    vertex_batch.push_back(HardwareVertex(v0));
+    vertex_batch.push_back(HardwareVertex(v1));
+    vertex_batch.push_back(HardwareVertex(v2));
+}
+
+/// Draw the current batch of triangles
+void RasterizerOpenGL::DrawTriangles() {
+    render_window->MakeCurrent();
+
+    state.Apply();
+
+    SyncFramebuffer();
+    SyncDrawState();
+
+    glBufferData(GL_ARRAY_BUFFER, vertex_batch.size() * sizeof(HardwareVertex), vertex_batch.data(), GL_STREAM_DRAW);
+    glDrawArrays(GL_TRIANGLES, 0, (GLsizei)vertex_batch.size());
+
+    vertex_batch.clear();
+}
+
+/// Notify rasterizer that a copy within 3ds memory will occur after this notification
+void RasterizerOpenGL::NotifyPreCopy(u32 src_paddr, u32 size) {
+    render_window->MakeCurrent();
+
+    state.Apply();
+
+    u32 cur_fb_color_addr = Pica::registers.framebuffer.GetColorBufferPhysicalAddress();
+    u32 cur_fb_color_size = ColorFormatBytesPerPixel(Pica::registers.framebuffer.color_format.Value())
+                            * Pica::registers.framebuffer.GetWidth() * Pica::registers.framebuffer.GetHeight();
+
+    u32 cur_fb_depth_addr = Pica::registers.framebuffer.GetDepthBufferPhysicalAddress();
+    u32 cur_fb_depth_size = Pica::Regs::BytesPerDepthPixel(Pica::registers.framebuffer.depth_format)
+                            * Pica::registers.framebuffer.GetWidth() * Pica::registers.framebuffer.GetHeight();
+
+    // If source memory region overlaps 3ds framebuffers, commit them before the copy happens
+    u32 max_lower = std::max(src_paddr, cur_fb_color_addr);
+    u32 min_upper = std::min(src_paddr + size, cur_fb_color_addr + cur_fb_color_size);
+
+    if (max_lower <= min_upper) {
+        CommitFramebuffer();
+    }
+
+    max_lower = std::max(src_paddr, cur_fb_depth_addr);
+    min_upper = std::min(src_paddr + size, cur_fb_depth_addr + cur_fb_depth_size);
+
+    if (max_lower <= min_upper) {
+        CommitFramebuffer();
+    }
+}
+
+/// Notify rasterizer that a 3ds memory region has been changed
+void RasterizerOpenGL::NotifyFlush(u32 paddr, u32 size) {
+    render_window->MakeCurrent();
+
+    state.Apply();
+
+    u32 cur_fb_color_addr = Pica::registers.framebuffer.GetColorBufferPhysicalAddress();
+    u32 cur_fb_color_size = ColorFormatBytesPerPixel(Pica::registers.framebuffer.color_format.Value())
+                            * Pica::registers.framebuffer.GetWidth() * Pica::registers.framebuffer.GetHeight();
+
+    u32 cur_fb_depth_addr = Pica::registers.framebuffer.GetDepthBufferPhysicalAddress();
+    u32 cur_fb_depth_size = Pica::Regs::BytesPerDepthPixel(Pica::registers.framebuffer.depth_format)
+                            * Pica::registers.framebuffer.GetWidth() * Pica::registers.framebuffer.GetHeight();
+
+    // If modified memory region overlaps 3ds framebuffers, reload their contents into OpenGL
+    u32 max_lower = std::max(paddr, cur_fb_color_addr);
+    u32 min_upper = std::min(paddr + size, cur_fb_color_addr + cur_fb_color_size);
+
+    if (max_lower <= min_upper) {
+        ReloadColorBuffer();
+    }
+
+    max_lower = std::max(paddr, cur_fb_depth_addr);
+    min_upper = std::min(paddr + size, cur_fb_depth_addr + cur_fb_depth_size);
+
+    if (max_lower <= min_upper) {
+        ReloadDepthBuffer();
+    }
+
+    // Notify cache of flush in case the region touches a cached resource
+    res_cache.NotifyFlush(paddr, size);
+}
+
+/// Reconfigure the OpenGL color texture to use the given format and dimensions
+void RasterizerOpenGL::ReconfigColorTexture(TextureInfo& texture, u32 format, u32 width, u32 height) {
+    GLint internal_format;
+
+    texture.format = format;
+    texture.width = width;
+    texture.height = height;
+
+    switch (format) {
+    case Pica::registers.framebuffer.RGBA8:
+        internal_format = GL_RGBA;
+        texture.gl_format = GL_RGBA;
+        texture.gl_type = GL_UNSIGNED_INT_8_8_8_8;
+        break;
+
+    case Pica::registers.framebuffer.RGB8:
+        // This pixel format uses BGR since GL_UNSIGNED_BYTE specifies byte-order, unlike every
+        // specific OpenGL type used in this function using native-endian (that is, little-endian
+        // mostly everywhere) for words or half-words.
+        // TODO: check how those behave on big-endian processors.
+        internal_format = GL_RGB;
+        texture.gl_format = GL_BGR;
+        texture.gl_type = GL_UNSIGNED_BYTE;
+        break;
+
+    case Pica::registers.framebuffer.RGB5A1:
+        internal_format = GL_RGBA;
+        texture.gl_format = GL_RGBA;
+        texture.gl_type = GL_UNSIGNED_SHORT_5_5_5_1;
+        break;
+
+    case Pica::registers.framebuffer.RGB565:
+        internal_format = GL_RGB;
+        texture.gl_format = GL_RGB;
+        texture.gl_type = GL_UNSIGNED_SHORT_5_6_5;
+        break;
+
+    case Pica::registers.framebuffer.RGBA4:
+        internal_format = GL_RGBA;
+        texture.gl_format = GL_RGBA;
+        texture.gl_type = GL_UNSIGNED_SHORT_4_4_4_4;
+        break;
+
+    default:
+        UNIMPLEMENTED();
+        break;
+    }
+
+    state.texture_unit[0].enabled_2d = true;
+    state.texture_unit[0].texture_2d = texture.texture.GetHandle();
+    state.Apply();
+
+    glActiveTexture(GL_TEXTURE0);
+    glTexImage2D(GL_TEXTURE_2D, 0, internal_format, texture.width, texture.height, 0,
+        texture.gl_format, texture.gl_type, nullptr);
+}
+
+/// Reconfigure the OpenGL depth texture to use the given format and dimensions
+void RasterizerOpenGL::ReconfigDepthTexture(DepthTextureInfo& texture, Pica::Regs::DepthFormat format, u32 width, u32 height) {
+    GLint internal_format;
+
+    texture.format = format;
+    texture.width = width;
+    texture.height = height;
+
+    switch (format) {
+    case Pica::Regs::DepthFormat::D16:
+        internal_format = GL_DEPTH_COMPONENT16;
+        texture.gl_format = GL_DEPTH_COMPONENT;
+        texture.gl_type = GL_UNSIGNED_SHORT;
+        break;
+
+    case Pica::Regs::DepthFormat::D24:
+        internal_format = GL_DEPTH_COMPONENT24;
+        texture.gl_format = GL_DEPTH_COMPONENT;
+        texture.gl_type = GL_UNSIGNED_INT_24_8;
+        break;
+
+    case Pica::Regs::DepthFormat::D24S8:
+        internal_format = GL_DEPTH24_STENCIL8;
+        texture.gl_format = GL_DEPTH_STENCIL;
+        texture.gl_type = GL_UNSIGNED_INT_24_8;
+        break;
+
+    default:
+        UNIMPLEMENTED();
+        break;
+    }
+
+    state.texture_unit[0].enabled_2d = true;
+    state.texture_unit[0].texture_2d = texture.texture.GetHandle();
+    state.Apply();
+
+    glActiveTexture(GL_TEXTURE0);
+    glTexImage2D(GL_TEXTURE_2D, 0, internal_format, texture.width, texture.height, 0,
+        texture.gl_format, texture.gl_type, nullptr);
+}
+
+/// Syncs the state and contents of the OpenGL framebuffer to match the current PICA framebuffer
+void RasterizerOpenGL::SyncFramebuffer() {
+    u32 cur_fb_color_addr = Pica::registers.framebuffer.GetColorBufferPhysicalAddress();
+    u32 new_fb_color_format = Pica::registers.framebuffer.color_format.Value();
+
+    u32 cur_fb_depth_addr = Pica::registers.framebuffer.GetDepthBufferPhysicalAddress();
+    Pica::Regs::DepthFormat new_fb_depth_format = Pica::registers.framebuffer.depth_format;
+
+    bool fb_prop_changed = (fb_color_texture.format != new_fb_color_format ||
+                            fb_depth_texture.format != new_fb_depth_format ||
+                            fb_color_texture.width != Pica::registers.framebuffer.GetWidth() ||
+                            fb_color_texture.height != Pica::registers.framebuffer.GetHeight());
+    bool fb_modified = (last_fb_color_addr != cur_fb_color_addr ||
+                        last_fb_depth_addr != cur_fb_depth_addr ||
+                        fb_prop_changed);
+
+    // Commit if fb modified in any way
+    if (fb_modified) {
+        CommitFramebuffer();
+    }
+
+    // Reconfigure framebuffer textures if any property has changed
+    if (fb_prop_changed) {
+        ReconfigColorTexture(fb_color_texture, new_fb_color_format,
+                                Pica::registers.framebuffer.GetWidth(), Pica::registers.framebuffer.GetHeight());
+
+        ReconfigDepthTexture(fb_depth_texture, new_fb_depth_format,
+                                Pica::registers.framebuffer.GetWidth(), Pica::registers.framebuffer.GetHeight());
+
+        // Only attach depth buffer as stencil if it supports stencil
+        switch (new_fb_depth_format) {
+        case Pica::Regs::DepthFormat::D16:
+        case Pica::Regs::DepthFormat::D24:
+            glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, 0, 0);
+            break;
+
+        case Pica::Regs::DepthFormat::D24S8:
+            glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, fb_depth_texture.texture.GetHandle(), 0);
+            break;
+
+        default:
+            UNIMPLEMENTED();
+            break;
+        }
+    }
+
+    // Load buffer data again if fb modified in any way
+    if (fb_modified) {
+        last_fb_color_addr = cur_fb_color_addr;
+        last_fb_depth_addr = cur_fb_depth_addr;
+
+        // Currently not needed b/c of reloading buffers below, but will be needed for high-res rendering
+        //glDepthMask(GL_TRUE);
+        //glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+        ReloadColorBuffer();
+        ReloadDepthBuffer();
+    }
+}
+
+/// Syncs the OpenGL drawing state to match the current PICA state
+void RasterizerOpenGL::SyncDrawState() {
+    // Sync the viewport
+    GLsizei viewportWidth = (GLsizei)Pica::float24::FromRawFloat24(Pica::registers.viewport_size_x.Value()).ToFloat32() * 2;
+    GLsizei viewportHeight = (GLsizei)Pica::float24::FromRawFloat24(Pica::registers.viewport_size_y.Value()).ToFloat32() * 2;
+
+    // OpenGL uses different y coordinates, so negate corner offset and flip origin
+    // TODO: Ensure viewport_corner.x should not be negated or origin flipped
+    glViewport((GLsizei)static_cast<float>(Pica::registers.viewport_corner.x.Value()),
+                -(GLsizei)static_cast<float>(Pica::registers.viewport_corner.y.Value())
+                    + Pica::registers.framebuffer.GetHeight() - viewportHeight,
+                viewportWidth, viewportHeight);
+
+    // Sync the cull mode
+    switch (Pica::registers.cull_mode.Value()) {
+    case Pica::Regs::CullMode::KeepAll:
+        state.cull.enabled = false;
+        break;
+
+    case Pica::Regs::CullMode::KeepClockWise:
+        state.cull.enabled = true;
+        state.cull.mode = GL_BACK;
+        break;
+
+    case Pica::Regs::CullMode::KeepCounterClockWise:
+        state.cull.enabled = true;
+        state.cull.mode = GL_FRONT;
+        break;
+
+    default:
+        LOG_ERROR(Render_OpenGL, "Unknown cull mode %d", Pica::registers.cull_mode.Value());
+        break;
+    }
+
+    // Sync depth test
+    if (Pica::registers.output_merger.depth_test_enable.Value()) {
+        state.depth.test_enabled = true;
+        state.depth.test_func = PicaToGL::CompareFunc(Pica::registers.output_merger.depth_test_func.Value());
+    } else {
+        state.depth.test_enabled = false;
+    }
+
+    // Sync depth writing
+    if (Pica::registers.output_merger.depth_write_enable.Value()) {
+        state.depth.write_mask = GL_TRUE;
+    } else {
+        state.depth.write_mask = GL_FALSE;
+    }
+
+    // Sync stencil test
+    // TODO: Untested, make sure stencil_reference_value refers to this mask
+    if (Pica::registers.output_merger.stencil_test.stencil_test_enable.Value()) {
+        state.stencil.test_enabled = true;
+        state.stencil.test_func = PicaToGL::CompareFunc(Pica::registers.output_merger.stencil_test.stencil_test_func.Value());
+        state.stencil.test_ref = Pica::registers.output_merger.stencil_test.stencil_reference_value.Value();
+        state.stencil.test_mask = Pica::registers.output_merger.stencil_test.stencil_replacement_value.Value();
+    }
+    else {
+        state.stencil.test_enabled = false;
+    }
+
+    // Sync stencil writing
+    // TODO: Untested, make sure stencil_mask refers to this mask
+    state.stencil.write_mask = Pica::registers.output_merger.stencil_test.stencil_mask.Value();
+
+    // TODO: Need to sync glStencilOp() once corresponding PICA registers are discovered
+
+    // Sync blend state
+    if (Pica::registers.output_merger.alphablend_enable.Value()) {
+        state.blend.enabled = true;
+
+        state.blend.color.red = (GLclampf)Pica::registers.output_merger.blend_const.r.Value() / 255.0f;
+        state.blend.color.green = (GLclampf)Pica::registers.output_merger.blend_const.g.Value() / 255.0f;
+        state.blend.color.blue = (GLclampf)Pica::registers.output_merger.blend_const.b.Value() / 255.0f;
+        state.blend.color.alpha = (GLclampf)Pica::registers.output_merger.blend_const.a.Value() / 255.0f;
+
+        state.blend.src_rgb_func = PicaToGL::BlendFunc(Pica::registers.output_merger.alpha_blending.factor_source_rgb.Value());
+        state.blend.dst_rgb_func = PicaToGL::BlendFunc(Pica::registers.output_merger.alpha_blending.factor_dest_rgb.Value());
+        state.blend.src_a_func = PicaToGL::BlendFunc(Pica::registers.output_merger.alpha_blending.factor_source_a.Value());
+        state.blend.dst_a_func = PicaToGL::BlendFunc(Pica::registers.output_merger.alpha_blending.factor_dest_a.Value());
+    } else {
+        state.blend.enabled = false;
+    }
+
+    // Sync bound texture(s), upload if uncached
+    auto pica_textures = Pica::registers.GetTextures();
+
+    for (int i = 0; i < 3; ++i) {
+        const auto& texture = pica_textures[i];
+
+        if (texture.enabled) {
+            state.texture_unit[i].enabled_2d = true;
+            res_cache.LoadAndBindTexture(state, i, texture);
+        }
+        else {
+            state.texture_unit[i].enabled_2d = false;
+        }
+    }
+
+    state.Apply();
+
+    // Sync shader output register mapping to hw shader
+    for (int i = 0; i < 7 * 4; ++i) {
+        glUniform1i(uniform_out_maps + i, 0);
+    }
+
+    for (int i = 0; i < 6; ++i) {
+        const auto& output_register_map = Pica::registers.vs_output_attributes[i];
+
+        u32 semantics[4] = {
+            output_register_map.map_x.Value(), output_register_map.map_y.Value(),
+            output_register_map.map_z.Value(), output_register_map.map_w.Value()
+        };
+
+        // TODO: Might only need to do this once per shader? Not sure when/if out maps are modified.
+        for (int comp = 0; comp < 4; ++comp) {
+            if (semantics[comp] != Pica::Regs::VSOutputAttributes::INVALID) {
+                glUniform1i(uniform_out_maps + semantics[comp], 4 * i + comp);
+            }
+        }
+    }
+
+    // Sync texture environment configurations to hw shader
+    auto tev_stages = Pica::registers.GetTevStages();
+    for (int i = 0; i < 6; i++) {
+        const auto& stage = tev_stages[i];
+        const auto& uniform_tev_cfg = uniform_tev_cfgs[i];
+
+        GLint color_srcs[3] = { (GLint)stage.color_source1.Value(), (GLint)stage.color_source2.Value(), (GLint)stage.color_source3.Value() };
+        GLint alpha_srcs[3] = { (GLint)stage.alpha_source1.Value(), (GLint)stage.alpha_source2.Value(), (GLint)stage.alpha_source3.Value() };
+        GLint color_mods[3] = { (GLint)stage.color_modifier1.Value(), (GLint)stage.color_modifier2.Value(), (GLint)stage.color_modifier3.Value() };
+        GLint alpha_mods[3] = { (GLint)stage.alpha_modifier1.Value(), (GLint)stage.alpha_modifier2.Value(), (GLint)stage.alpha_modifier3.Value() };
+        GLfloat const_color[4] = { stage.const_r.Value() / 255.0f,
+                                    stage.const_g.Value() / 255.0f,
+                                    stage.const_b.Value() / 255.0f,
+                                    stage.const_a.Value() / 255.0f };
+
+        glUniform3iv(uniform_tev_cfg.color_sources, 1, color_srcs);
+        glUniform3iv(uniform_tev_cfg.alpha_sources, 1, alpha_srcs);
+        glUniform3iv(uniform_tev_cfg.color_modifiers, 1, color_mods);
+        glUniform3iv(uniform_tev_cfg.alpha_modifiers, 1, alpha_mods);
+        glUniform2i(uniform_tev_cfg.color_alpha_op, (GLint)stage.color_op.Value(), (GLint)stage.alpha_op.Value());
+        glUniform2f(uniform_tev_cfg.color_alpha_multiplier, (GLfloat)stage.GetColorMultiplier(), (GLfloat)stage.GetAlphaMultiplier());
+        glUniform4fv(uniform_tev_cfg.const_color, 1, const_color);
+        glUniform2i(uniform_tev_cfg.updates_combiner_buffer_color_alpha,
+                    Pica::registers.tev_combiner_buffer_input.TevStageUpdatesCombinerBufferColor(i),
+                    Pica::registers.tev_combiner_buffer_input.TevStageUpdatesCombinerBufferAlpha(i));
+    }
+
+    // Sync alpha testing to hw shader
+    if (Pica::registers.output_merger.alpha_test.enable.Value()) {
+        glUniform1i(uniform_alphatest_func, Pica::registers.output_merger.alpha_test.func.Value());
+        glUniform1f(uniform_alphatest_ref, Pica::registers.output_merger.alpha_test.ref.Value() / 255.0f);
+    } else {
+        glUniform1i(uniform_alphatest_func, 1);
+    }
+}
+
+/// Copies the 3ds color framebuffer into the OpenGL color framebuffer texture
+void RasterizerOpenGL::ReloadColorBuffer() {
+    u8* color_buffer = Memory::GetPhysicalPointer(last_fb_color_addr);
+
+    if (color_buffer == nullptr) {
+        return;
+    }
+
+    u32 bytes_per_pixel = ColorFormatBytesPerPixel(fb_color_texture.format);
+
+    u8* ogl_img = new u8[fb_color_texture.width * fb_color_texture.height * bytes_per_pixel];
+
+    // TODO: Evaluate whether u16/memcpy/u32 is faster for 2/3/4 bpp versus memcpy for all
+    for (int x = 0; x < fb_color_texture.width; ++x)
+    {
+        for (int y = 0; y < fb_color_texture.height; ++y)
+        {
+            const u32 coarse_y = y & ~7;
+            u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * fb_color_texture.width * bytes_per_pixel;
+            u32 ogl_px_idx = x * bytes_per_pixel + y * fb_color_texture.width * bytes_per_pixel;
+
+            u8* pixel = color_buffer + dst_offset;
+            memcpy(&ogl_img[ogl_px_idx], pixel, bytes_per_pixel);
+        }
+    }
+
+    state.texture_unit[0].enabled_2d = true;
+    state.texture_unit[0].texture_2d = fb_color_texture.texture.GetHandle();
+    state.Apply();
+
+    glActiveTexture(GL_TEXTURE0);
+    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, fb_color_texture.width, fb_color_texture.height, fb_color_texture.gl_format, fb_color_texture.gl_type, ogl_img);
+
+    delete[] ogl_img;
+}
+
+/// Copies the 3ds depth framebuffer into the OpenGL depth framebuffer texture
+void RasterizerOpenGL::ReloadDepthBuffer() {
+    // TODO: Appears to work, but double-check endianness of depth values and order of depth-stencil
+    u8* depth_buffer = Memory::GetPhysicalPointer(last_fb_depth_addr);
+
+    if (depth_buffer == nullptr) {
+        return;
+    }
+
+    u32 bytes_per_pixel = Pica::Regs::BytesPerDepthPixel(fb_depth_texture.format);
+
+    // OpenGL needs 4 bpp alignment for D24
+    u32 ogl_bpp = bytes_per_pixel == 3 ? 4 : bytes_per_pixel;
+
+    u8* ogl_img = new u8[fb_depth_texture.width * fb_depth_texture.height * ogl_bpp];
+
+    for (int x = 0; x < fb_depth_texture.width; ++x)
+    {
+        for (int y = 0; y < fb_depth_texture.height; ++y)
+        {
+            const u32 coarse_y = y & ~7;
+            u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * fb_depth_texture.width * bytes_per_pixel;
+            u32 ogl_px_idx = x + y * fb_depth_texture.width;
+
+            switch (fb_depth_texture.format) {
+            case Pica::Regs::DepthFormat::D16:
+                ((u16*)ogl_img)[ogl_px_idx] = Color::DecodeD16(depth_buffer + dst_offset);
+                break;
+            case Pica::Regs::DepthFormat::D24:
+                ((u32*)ogl_img)[ogl_px_idx] = Color::DecodeD24(depth_buffer + dst_offset);
+                break;
+            case Pica::Regs::DepthFormat::D24S8:
+            {
+                Math::Vec2<u32> depth_stencil = Color::DecodeD24S8(depth_buffer + dst_offset);
+                ((u32*)ogl_img)[ogl_px_idx] = depth_stencil.x << 8 | depth_stencil.y;
+                break;
+            }
+            default:
+                LOG_CRITICAL(Render_OpenGL, "Unknown memory framebuffer depth format %x", fb_depth_texture.format);
+                UNIMPLEMENTED();
+                break;
+            }
+        }
+    }
+
+    state.texture_unit[0].enabled_2d = true;
+    state.texture_unit[0].texture_2d = fb_depth_texture.texture.GetHandle();
+    state.Apply();
+
+    glActiveTexture(GL_TEXTURE0);
+    glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, fb_depth_texture.width, fb_depth_texture.height, fb_depth_texture.gl_format, fb_depth_texture.gl_type, ogl_img);
+
+    delete[] ogl_img;
+}
+
+/**
+* Save the current OpenGL framebuffer to the current PICA framebuffer in 3ds memory
+* Loads the OpenGL framebuffer textures into temporary buffers
+* Then copies into the 3ds framebuffer using proper Morton order
+*/
+void RasterizerOpenGL::CommitFramebuffer() {
+    if (last_fb_color_addr != -1)
+    {
+        u8* color_buffer = Memory::GetPhysicalPointer(last_fb_color_addr);
+
+        if (color_buffer != nullptr) {
+            u32 bytes_per_pixel = ColorFormatBytesPerPixel(fb_color_texture.format);
+
+            std::unique_ptr<u8> ogl_img(new u8[fb_color_texture.width * fb_color_texture.height * bytes_per_pixel]);
+
+            state.texture_unit[0].enabled_2d = true;
+            state.texture_unit[0].texture_2d = fb_color_texture.texture.GetHandle();
+            state.Apply();
+
+            glActiveTexture(GL_TEXTURE0);
+            glGetTexImage(GL_TEXTURE_2D, 0, fb_color_texture.gl_format, fb_color_texture.gl_type, ogl_img.get());
+
+            for (int x = 0; x < fb_color_texture.width; ++x)
+            {
+                for (int y = 0; y < fb_color_texture.height; ++y)
+                {
+                    const u32 coarse_y = y & ~7;
+                    u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * fb_color_texture.width * bytes_per_pixel;
+                    u32 ogl_px_idx = x * bytes_per_pixel + y * fb_color_texture.width * bytes_per_pixel;
+
+                    u8* pixel = color_buffer + dst_offset;
+                    memcpy(pixel, &ogl_img.get()[ogl_px_idx], bytes_per_pixel);
+                }
+            }
+        }
+    }
+
+    if (last_fb_depth_addr != -1)
+    {
+        // TODO: Output seems correct visually, but doesn't quite match sw renderer output. One of them is wrong.
+        u8* depth_buffer = Memory::GetPhysicalPointer(last_fb_depth_addr);
+
+        if (depth_buffer != nullptr) {
+            u32 bytes_per_pixel = Pica::Regs::BytesPerDepthPixel(fb_depth_texture.format);
+
+            // OpenGL needs 4 bpp alignment for D24
+            u32 ogl_bpp = bytes_per_pixel == 3 ? 4 : bytes_per_pixel;
+
+            std::unique_ptr<u8> ogl_img(new u8[fb_depth_texture.width * fb_depth_texture.height * ogl_bpp]);
+
+            state.texture_unit[0].enabled_2d = true;
+            state.texture_unit[0].texture_2d = fb_depth_texture.texture.GetHandle();
+            state.Apply();
+
+            glActiveTexture(GL_TEXTURE0);
+            glGetTexImage(GL_TEXTURE_2D, 0, fb_depth_texture.gl_format, fb_depth_texture.gl_type, ogl_img.get());
+
+            for (int x = 0; x < fb_depth_texture.width; ++x)
+            {
+                for (int y = 0; y < fb_depth_texture.height; ++y)
+                {
+                    const u32 coarse_y = y & ~7;
+                    u32 dst_offset = VideoCore::GetMortonOffset(x, y, bytes_per_pixel) + coarse_y * fb_depth_texture.width * bytes_per_pixel;
+                    u32 ogl_px_idx = x + y * fb_depth_texture.width;
+
+                    switch (fb_depth_texture.format) {
+                    case Pica::Regs::DepthFormat::D16:
+                        Color::EncodeD16(((u16*)ogl_img.get())[ogl_px_idx], depth_buffer + dst_offset);
+                        break;
+                    case Pica::Regs::DepthFormat::D24:
+                        Color::EncodeD24(((u32*)ogl_img.get())[ogl_px_idx], depth_buffer + dst_offset);
+                        break;
+                    case Pica::Regs::DepthFormat::D24S8:
+                    {
+                        u32 depth_stencil = ((u32*)ogl_img.get())[ogl_px_idx];
+                        Color::EncodeD24S8(depth_stencil >> 8, depth_stencil & 0xFF, depth_buffer + dst_offset);
+                        break;
+                    }
+                    default:
+                        LOG_CRITICAL(Render_OpenGL, "Unknown framebuffer depth format %x", fb_depth_texture.format);
+                        UNIMPLEMENTED();
+                        break;
+                    }
+                }
+            }
+        }
+    }
+}

src/video_core/renderer_opengl/gl_rasterizer.h

@@ -0,0 +1,152 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "video_core/hwrasterizer_base.h"
+
+#include "gl_state.h"
+#include "gl_rasterizer_cache.h"
+
+class RasterizerOpenGL : public HWRasterizer {
+public:
+
+    RasterizerOpenGL();
+    ~RasterizerOpenGL() override;
+
+    /// Initialize API-specific GPU objects
+    void InitObjects() override;
+
+    /// Set the window (context) to draw with
+    void SetWindow(EmuWindow* window) override;
+
+    /// Converts the triangle verts to hardware data format and adds them to the current batch
+    void AddTriangle(const Pica::VertexShader::OutputVertex& v0,
+                     const Pica::VertexShader::OutputVertex& v1,
+                     const Pica::VertexShader::OutputVertex& v2) override;
+
+    /// Draw the current batch of triangles
+    void DrawTriangles() override;
+
+    /// Notify rasterizer that a copy within 3ds memory will occur after this notification
+    void NotifyPreCopy(u32 src_paddr, u32 size) override;
+
+    /// Notify rasterizer that a 3ds memory region has been changed
+    void NotifyFlush(u32 paddr, u32 size) override;
+
+private:
+    /// Structure used for managing texture environment states
+    struct TEVConfigUniforms {
+        GLuint color_sources;
+        GLuint alpha_sources;
+        GLuint color_modifiers;
+        GLuint alpha_modifiers;
+        GLuint color_alpha_op;
+        GLuint color_alpha_multiplier;
+        GLuint const_color;
+        GLuint updates_combiner_buffer_color_alpha;
+    };
+
+    /// Structure used for storing information about color textures
+    struct TextureInfo {
+        OGLTexture texture;
+        GLsizei width;
+        GLsizei height;
+        u32 format;
+        GLenum gl_format;
+        GLenum gl_type;
+    };
+
+    /// Structure used for storing information about depth textures
+    struct DepthTextureInfo {
+        OGLTexture texture;
+        GLsizei width;
+        GLsizei height;
+        Pica::Regs::DepthFormat format;
+        GLenum gl_format;
+        GLenum gl_type;
+    };
+
+    ///Structure that the hardware rendered vertices are composed of
+    struct HardwareVertex {
+        HardwareVertex(const Pica::VertexShader::OutputVertex& v) {
+            position[0] = v.pos.x.ToFloat32();
+            position[1] = v.pos.y.ToFloat32();
+            position[2] = v.pos.z.ToFloat32();
+            position[3] = v.pos.w.ToFloat32();
+            color[0] = v.color.x.ToFloat32();
+            color[1] = v.color.y.ToFloat32();
+            color[2] = v.color.z.ToFloat32();
+            color[3] = v.color.w.ToFloat32();
+            tex_coord0[0] = v.tc0.x.ToFloat32();
+            tex_coord0[1] = v.tc0.y.ToFloat32();
+            tex_coord1[0] = v.tc1.x.ToFloat32();
+            tex_coord1[1] = v.tc1.y.ToFloat32();
+            tex_coord2[0] = v.tc2.x.ToFloat32();
+            tex_coord2[1] = v.tc2.y.ToFloat32();
+        }
+
+        GLfloat position[4];
+        GLfloat color[4];
+        GLfloat tex_coord0[2];
+        GLfloat tex_coord1[2];
+        GLfloat tex_coord2[2];
+    };
+
+    /// Reconfigure the OpenGL color texture to use the given format and dimensions
+    void ReconfigColorTexture(TextureInfo& texture, u32 format, u32 width, u32 height);
+
+    /// Reconfigure the OpenGL depth texture to use the given format and dimensions
+    void ReconfigDepthTexture(DepthTextureInfo& texture, Pica::Regs::DepthFormat format, u32 width, u32 height);
+
+    /// Syncs the state and contents of the OpenGL framebuffer to match the current PICA framebuffer
+    void SyncFramebuffer();
+
+    /// Syncs the OpenGL drawing state to match the current PICA state
+    void SyncDrawState();
+
+    /// Copies the 3ds color framebuffer into the OpenGL color framebuffer texture
+    void ReloadColorBuffer();
+
+    /// Copies the 3ds depth framebuffer into the OpenGL depth framebuffer texture
+    void ReloadDepthBuffer();
+
+    /**
+    * Save the current OpenGL framebuffer to the current PICA framebuffer in 3ds memory
+    * Loads the OpenGL framebuffer textures into temporary buffers
+    * Then copies into the 3ds framebuffer using proper Morton order
+    */
+    void CommitFramebuffer();
+
+    EmuWindow* render_window;
+    RasterizerCacheOpenGL res_cache;
+
+    std::vector<HardwareVertex> vertex_batch;
+
+    OpenGLState state;
+
+    PAddr last_fb_color_addr;
+    PAddr last_fb_depth_addr;
+
+    // Hardware rasterizer
+    TextureInfo fb_color_texture;
+    DepthTextureInfo fb_depth_texture;
+    OGLShader shader;
+    OGLVertexArray vertex_array;
+    OGLBuffer vertex_buffer;
+    OGLFramebuffer framebuffer;
+
+    // Hardware vertex shader
+    GLuint attrib_position;
+    GLuint attrib_color;
+    GLuint attrib_texcoords;
+
+    // Hardware fragment shader
+    GLuint uniform_alphatest_func;
+    GLuint uniform_alphatest_ref;
+    GLuint uniform_tex;
+    TEVConfigUniforms uniform_tev_cfgs[6];
+    GLuint uniform_out_maps;
+    GLuint uniform_tex_envs;
+};

src/video_core/renderer_opengl/gl_rasterizer_cache.cpp

@@ -0,0 +1,82 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/mem_map.h"
+#include "video_core/renderer_opengl/gl_pica_to_gl.h"
+#include "video_core/renderer_opengl/gl_rasterizer_cache.h"
+#include "video_core/debug_utils/debug_utils.h"
+#include "video_core/math.h"
+
+RasterizerCacheOpenGL::~RasterizerCacheOpenGL() {
+    FullFlush();
+}
+
+/// Loads a texture from 3ds memory to OpenGL and caches it (if not already cached)
+void RasterizerCacheOpenGL::LoadAndBindTexture(OpenGLState &state, int texture_unit, const Pica::Regs::FullTextureConfig& config) {
+    PAddr tex_paddr = config.config.GetPhysicalAddress();
+
+    auto cached_texture = texture_cache.find(tex_paddr);
+
+    if (cached_texture != texture_cache.end()) {
+        state.texture_unit[texture_unit].texture_2d = cached_texture->second->texture.GetHandle();
+        state.Apply();
+    } else {
+        std::shared_ptr<CachedTexture> new_texture(new CachedTexture());
+
+        new_texture->texture.Create();
+        state.texture_unit[texture_unit].texture_2d = new_texture->texture.GetHandle();
+        state.Apply();
+
+        // TODO: Need to choose filters that correspond to PICA once register is declared
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, PicaToGL::WrapMode(config.config.wrap_s.Value()));
+        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, PicaToGL::WrapMode(config.config.wrap_t.Value()));
+
+        auto info = Pica::DebugUtils::TextureInfo::FromPicaRegister(config.config, config.format);
+
+        new_texture->width = info.width;
+        new_texture->height = info.height;
+        new_texture->size = info.width * info.height * Pica::Regs::NibblesPerPixel(info.format);
+
+        Math::Vec4<u8>* rgba_tex = new Math::Vec4<u8>[info.width * info.height];
+
+        for (int i = 0; i < info.width; i++)
+        {
+            for (int j = 0; j < info.height; j++)
+            {
+                rgba_tex[i + info.width * j] = Pica::DebugUtils::LookupTexture(Memory::GetPhysicalPointer(tex_paddr), i, info.height - 1 - j, info);
+            }
+        }
+
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, info.width, info.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, rgba_tex);
+
+        delete[] rgba_tex;
+
+        texture_cache.emplace(tex_paddr, new_texture);
+    }
+}
+
+/// Flush any cached resource that touches the flushed region
+void RasterizerCacheOpenGL::NotifyFlush(u32 paddr, u32 size) {
+    // Flush any texture that falls in the flushed region
+    for (auto it = texture_cache.begin(); it != texture_cache.end();) {
+        u32 max_lower = std::max(paddr, it->first);
+        u32 min_upper = std::min(paddr + size, it->first + it->second->size);
+
+        if (max_lower <= min_upper) {
+            it = texture_cache.erase(it);
+        } else {
+            ++it;
+        }
+    }
+}
+
+/// Flush all cached resources
+void RasterizerCacheOpenGL::FullFlush() {
+    for (auto it = texture_cache.begin(); it != texture_cache.end();) {
+        it = texture_cache.erase(it);
+    }
+}

src/video_core/renderer_opengl/gl_rasterizer_cache.h

@@ -0,0 +1,36 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "gl_state.h"
+#include "gl_resource_manager.h"
+#include "video_core/pica.h"
+
+#include <memory>
+#include <map>
+
+class RasterizerCacheOpenGL : NonCopyable {
+public:
+    ~RasterizerCacheOpenGL();
+
+    /// Loads a texture from 3ds memory to OpenGL and caches it (if not already cached)
+    void LoadAndBindTexture(OpenGLState &state, int texture_unit, const Pica::Regs::FullTextureConfig& config);
+
+    /// Flush any cached resource that touches the flushed region
+    void NotifyFlush(u32 paddr, u32 size);
+
+    /// Flush all cached OpenGL resources tracked by this cache manager
+    void FullFlush();
+
+private:
+    struct CachedTexture {
+        OGLTexture texture;
+        GLuint width;
+        GLuint height;
+        u32 size;
+    };
+
+    std::map<u32, std::shared_ptr<CachedTexture>> texture_cache;
+};

src/video_core/renderer_opengl/gl_resource_manager.cpp

@@ -0,0 +1,109 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "video_core/renderer_opengl/gl_resource_manager.h"
+#include "video_core/renderer_opengl/gl_shader_util.h"
+
+// OGLResource base class
+OGLResource::OGLResource() : handle(0) {
+    
+}
+
+OGLResource::~OGLResource() {
+
+}
+
+void OGLResource::Release() {
+    
+}
+
+// Textures
+OGLTexture::~OGLTexture() {
+    Release();
+}
+
+void OGLTexture::Create() {
+    if (handle != 0) {
+        return;
+    }
+
+    glGenTextures(1, &handle);
+}
+
+void OGLTexture::Release() {
+    glDeleteTextures(1, &handle);
+    handle = 0;
+}
+
+// Shaders
+OGLShader::~OGLShader() {
+    Release();
+}
+
+void OGLShader::Create(const char* vert_shader, const char* frag_shader) {
+    if (handle != 0) {
+        return;
+    }
+
+    handle = ShaderUtil::LoadShaders(vert_shader, frag_shader);
+}
+
+void OGLShader::Release() {
+    glDeleteProgram(handle);
+    handle = 0;
+}
+
+// Buffer objects
+OGLBuffer::~OGLBuffer() {
+    Release();
+}
+
+void OGLBuffer::Create() {
+    if (handle != 0) {
+        return;
+    }
+
+    glGenBuffers(1, &handle);
+}
+
+void OGLBuffer::Release() {
+    glDeleteBuffers(1, &handle);
+    handle = 0;
+}
+
+// Vertex array objects
+OGLVertexArray::~OGLVertexArray() {
+    Release();
+}
+
+void OGLVertexArray::Create() {
+    if (handle != 0) {
+        return;
+    }
+
+    glGenVertexArrays(1, &handle);
+}
+
+void OGLVertexArray::Release() {
+    glDeleteVertexArrays(1, &handle);
+    handle = 0;
+}
+
+// Framebuffers
+OGLFramebuffer::~OGLFramebuffer() {
+    Release();
+}
+
+void OGLFramebuffer::Create() {
+    if (handle != 0) {
+        return;
+    }
+
+    glGenFramebuffers(1, &handle);
+}
+
+void OGLFramebuffer::Release() {
+    glDeleteFramebuffers(1, &handle);
+    handle = 0;
+}

src/video_core/renderer_opengl/gl_resource_manager.h

@@ -0,0 +1,81 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+#include "generated/gl_3_2_core.h"
+
+class OGLResource : NonCopyable {
+public:
+    OGLResource();
+    virtual ~OGLResource();
+
+    /// Returns the internal OpenGL resource handle for this resource
+    inline GLuint GetHandle() {
+        return handle;
+    }
+
+    /// Deletes the internal OpenGL resource
+    virtual void Release();
+
+protected:
+    GLuint handle;
+};
+
+class OGLTexture : public OGLResource {
+public:
+    ~OGLTexture() override;
+
+    /// Creates a new internal OpenGL resource and stores the handle
+    void Create();
+
+    /// Deletes the internal OpenGL resource
+    void Release() override;
+};
+
+class OGLShader : public OGLResource {
+public:
+    ~OGLShader() override;
+
+    /// Creates a new internal OpenGL resource and stores the handle
+    void Create(const char* vert_shader, const char* frag_shader);
+
+    /// Deletes the internal OpenGL resource
+    void Release() override;
+};
+
+class OGLBuffer : public OGLResource {
+public:
+    ~OGLBuffer() override;
+
+    /// Creates a new internal OpenGL resource and stores the handle
+    void Create();
+
+    /// Deletes the internal OpenGL resource
+    void Release() override;
+};
+
+class OGLVertexArray : public OGLResource {
+public:
+    ~OGLVertexArray() override;
+
+    /// Creates a new internal OpenGL resource and stores the handle
+    void Create();
+
+    /// Deletes the internal OpenGL resource
+    void Release() override;
+};
+
+class OGLFramebuffer : public OGLResource {
+public:
+    ~OGLFramebuffer() override;
+
+    /// Creates a new internal OpenGL resource and stores the handle
+    void Create();
+
+    /// Deletes the internal OpenGL resource
+    void Release() override;
+};

src/video_core/renderer_opengl/gl_shaders.h

@@ -42,4 +42,296 @@ void main() {
 }
 )";
 
+const char g_vertex_shader_hw[] = R"(
+#version 150 core
+
+in vec4 vert_position;
+in vec4 vert_color;
+in vec2 vert_texcoords[3];
+
+out vec4 o[7];
+
+uniform int out_maps[7*4];
+
+void SetVal(int map_idx, float val) {
+    o[out_maps[map_idx] / 4][out_maps[map_idx] % 4] = val;
+}
+
+void main() {
+    SetVal(8, vert_color.x);
+    SetVal(9, vert_color.y);
+    SetVal(10, vert_color.z);
+    SetVal(11, vert_color.w);
+    SetVal(12, vert_texcoords[0].x);
+    SetVal(13, vert_texcoords[0].y);
+
+    // TODO: These seem like the wrong map indices
+    SetVal(14, vert_texcoords[1].x);
+    SetVal(15, vert_texcoords[1].y);
+    SetVal(16, vert_texcoords[2].x);
+    SetVal(17, vert_texcoords[2].y);
+
+    gl_Position = vec4(vert_position.x, -vert_position.y, -vert_position.z, vert_position.w);
+}
+)";
+
+// TODO: Create a shader constructor and cache that builds this program with minimal conditionals instead of using tev_cfg uniforms
+const char g_fragment_shader_hw[] = R"(
+#version 150 core
+
+in vec4 o[7];
+out vec4 color;
+
+uniform int alphatest_func;
+uniform float alphatest_ref;
+
+uniform sampler2D tex[3];
+
+struct TEVConfig
+{
+    ivec3 color_sources;
+    ivec3 alpha_sources;
+    ivec3 color_modifiers;
+    ivec3 alpha_modifiers;
+    ivec2 color_alpha_op;
+    vec2 color_alpha_multiplier;
+    vec4 const_color;
+    bvec2 updates_combiner_buffer_color_alpha;
+};
+
+uniform TEVConfig tev_cfgs[6];
+
+uniform int out_maps[7*4];
+
+vec4 g_combiner_buffer;
+vec4 g_last_tex_env_out;
+vec4 g_const_color;
+
+float GetVal(int map_idx) {
+    return o[out_maps[map_idx] / 4][out_maps[map_idx] % 4];
+}
+
+vec4 GetSource(int source) {
+    if (source == 0) {
+        // HACK: Should use values 8/9/10/11 but hurts framerate
+        return o[out_maps[8] >> 2];
+    }
+    else if (source == 1) {
+        return o[out_maps[8] >> 2];
+    }
+    else if (source == 3) {
+        return texture(tex[0], vec2(GetVal(12), GetVal(13)));
+    }
+    else if (source == 4) {
+        return texture(tex[1], vec2(GetVal(14), GetVal(15)));
+    }
+    else if (source == 5) {
+        // TODO: Unverified
+        return texture(tex[2], vec2(GetVal(16), GetVal(17)));
+    }
+    else if (source == 6) {
+        // TODO: no 4th texture?
+    }
+    else if (source == 13) {
+        return g_combiner_buffer;
+    }
+    else if (source == 14) {
+        return g_const_color;
+    }
+    else if (source == 15) {
+        return g_last_tex_env_out;
+    }
+
+    return vec4(0.0, 0.0, 0.0, 0.0);
+}
+
+vec3 GetColorModifier(int factor, vec4 color) {
+    if (factor == 0) {
+        return color.rgb;
+    }
+    else if (factor == 1) {
+        return vec3(1.0, 1.0, 1.0) - color.rgb;
+    }
+    else if (factor == 2) {
+        return color.aaa;
+    }
+    else if (factor == 3) {
+        return vec3(1.0, 1.0, 1.0) - color.aaa;
+    }
+    else if (factor == 4) {
+        return color.rrr;
+    }
+    else if (factor == 5) {
+        return vec3(1.0, 1.0, 1.0) - color.rrr;
+    }
+    else if (factor == 8) {
+        return color.ggg;
+    }
+    else if (factor == 9) {
+        return vec3(1.0, 1.0, 1.0) - color.ggg;
+    }
+    else if (factor == 12) {
+        return color.bbb;
+    }
+    else if (factor == 13) {
+        return vec3(1.0, 1.0, 1.0) - color.bbb;
+    }
+
+    return vec3(0.0, 0.0, 0.0);
+}
+
+float GetAlphaModifier(int factor, vec4 color) {
+    if (factor == 0) {
+        return color.a;
+    }
+    else if (factor == 1) {
+        return 1.0 - color.a;
+    }
+    else if (factor == 2) {
+        return color.r;
+    }
+    else if (factor == 3) {
+        return 1.0 - color.r;
+    }
+    else if (factor == 4) {
+        return color.g;
+    }
+    else if (factor == 5) {
+        return 1.0 - color.g;
+    }
+    else if (factor == 6) {
+        return color.b;
+    }
+    else if (factor == 7) {
+        return 1.0 - color.b;
+    }
+
+    return 0.0;
+}
+
+vec3 ColorCombine(int op, vec3 color[3]) {
+    if (op == 0) {
+        return color[0];
+    }
+    else if (op == 1) {
+        return color[0] * color[1];
+    }
+    else if (op == 2) {
+        return min(color[0] + color[1], 1.0);
+    }
+    else if (op == 3) {
+        return color[0] + color[1] - vec3(0.5, 0.5, 0.5);
+    }
+    else if (op == 4) {
+        return color[0] * color[2] + color[1] * (vec3(1.0, 1.0, 1.0) - color[2]);
+    }
+    else if (op == 5) {
+        return max(color[0] - color[1], 0.0);
+    }
+    else if (op == 8) {
+        return min(color[0] * color[1] + color[2], 1.0);
+    }
+    else if (op == 9) {
+        return min(color[0] + color[1], 1.0) * color[2];
+    }
+
+    return vec3(0.0, 0.0, 0.0);
+}
+
+float AlphaCombine(int op, float alpha[3]) {
+    if (op == 0) {
+        return alpha[0];
+    }
+    else if (op == 1) {
+        return alpha[0] * alpha[1];
+    }
+    else if (op == 2) {
+        return min(alpha[0] + alpha[1], 1.0);
+    }
+    else if (op == 3) {
+        return alpha[0] + alpha[1] - 0.5;
+    }
+    else if (op == 4) {
+        return alpha[0] * alpha[2] + alpha[1] * (1.0 - alpha[2]);
+    }
+    else if (op == 5) {
+        return max(alpha[0] - alpha[1], 0.0);
+    }
+    else if (op == 8) {
+        return min(alpha[0] * alpha[1] + alpha[2], 1.0);
+    }
+    else if (op == 9) {
+        return min(alpha[0] + alpha[1], 1.0) * alpha[2];
+    }
+
+    return 0.0;
+}
+
+void ProcessTexEnv(int tex_env_idx) {
+    g_const_color = tev_cfgs[tex_env_idx].const_color;
+
+    vec3 color_results[3] = vec3[3](GetColorModifier(tev_cfgs[tex_env_idx].color_modifiers.x, GetSource(tev_cfgs[tex_env_idx].color_sources.x)),
+                                    GetColorModifier(tev_cfgs[tex_env_idx].color_modifiers.y, GetSource(tev_cfgs[tex_env_idx].color_sources.y)),
+                                    GetColorModifier(tev_cfgs[tex_env_idx].color_modifiers.z, GetSource(tev_cfgs[tex_env_idx].color_sources.z)));
+    vec3 color_output = ColorCombine(tev_cfgs[tex_env_idx].color_alpha_op.x, color_results);
+
+    float alpha_results[3] = float[3](GetAlphaModifier(tev_cfgs[tex_env_idx].alpha_modifiers.x, GetSource(tev_cfgs[tex_env_idx].alpha_sources.x)),
+                                      GetAlphaModifier(tev_cfgs[tex_env_idx].alpha_modifiers.y, GetSource(tev_cfgs[tex_env_idx].alpha_sources.y)),
+                                      GetAlphaModifier(tev_cfgs[tex_env_idx].alpha_modifiers.z, GetSource(tev_cfgs[tex_env_idx].alpha_sources.z)));
+    float alpha_output = AlphaCombine(tev_cfgs[tex_env_idx].color_alpha_op.y, alpha_results);
+
+    g_last_tex_env_out = vec4(min(color_output * tev_cfgs[tex_env_idx].color_alpha_multiplier.x, 1.0), min(alpha_output * tev_cfgs[tex_env_idx].color_alpha_multiplier.y, 1.0));
+
+    if (tev_cfgs[tex_env_idx].updates_combiner_buffer_color_alpha.x) {
+        g_combiner_buffer.rgb = g_last_tex_env_out.rgb;
+    }
+
+    if (tev_cfgs[tex_env_idx].updates_combiner_buffer_color_alpha.y) {
+        g_combiner_buffer.a = g_last_tex_env_out.a;
+    }
+}
+
+void main(void) {
+    for (int i = 0; i < 6; ++i) {
+        ProcessTexEnv(i);
+    }
+
+    if (alphatest_func == 0) {
+        discard;
+    }
+    else if (alphatest_func == 2) {
+        if (g_last_tex_env_out.a != alphatest_ref) {
+            discard;
+        }
+    }
+    else if (alphatest_func == 3) {
+        if (g_last_tex_env_out.a == alphatest_ref) {
+            discard;
+        }
+    }
+    else if (alphatest_func == 4) {
+        if (g_last_tex_env_out.a > alphatest_ref) {
+            discard;
+        }
+    }
+    else if (alphatest_func == 5) {
+        if (g_last_tex_env_out.a >= alphatest_ref) {
+            discard;
+        }
+    }
+    else if (alphatest_func == 6) {
+        if (g_last_tex_env_out.a < alphatest_ref) {
+            discard;
+        }
+    }
+    else if (alphatest_func == 7) {
+        if (g_last_tex_env_out.a <= alphatest_ref) {
+            discard;
+        }
+    }
+
+    color = g_last_tex_env_out;
+}
+)";
+
 }

src/video_core/renderer_opengl/gl_state.cpp

@@ -0,0 +1,162 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "video_core/renderer_opengl/gl_state.h"
+
+OpenGLState OpenGLState::cur_state;
+
+OpenGLState::OpenGLState()
+{
+    // These all match default OpenGL values
+    cull.enabled = false;
+    cull.mode = GL_BACK;
+
+    depth.test_enabled = false;
+    depth.test_func = GL_LESS;
+    depth.write_mask = GL_TRUE;
+
+    stencil.test_enabled = false;
+    stencil.test_func = GL_ALWAYS;
+    stencil.test_ref = 0;
+    stencil.test_mask = -1;
+    stencil.write_mask = -1;
+
+    blend.enabled = false;
+    blend.src_rgb_func = GL_ONE;
+    blend.dst_rgb_func = GL_ZERO;
+    blend.src_a_func = GL_ONE;
+    blend.dst_a_func = GL_ZERO;
+    blend.color.red = 0.0f;
+    blend.color.green = 0.0f;
+    blend.color.blue = 0.0f;
+    blend.color.alpha = 0.0f;
+
+    for (int i = 0; i < 3; i++) {
+        texture_unit[i].enabled_2d = false;
+        texture_unit[i].texture_2d = 0;
+    }
+
+    draw.framebuffer = 0;
+    draw.vertex_array = 0;
+    draw.vertex_buffer = 0;
+    draw.shader_program = 0;
+}
+
+/// Apply this state as the current OpenGL state
+void OpenGLState::Apply() {
+    // Culling
+    if (cull.enabled) {
+        if (cull.enabled != cur_state.cull.enabled) {
+            glEnable(GL_CULL_FACE);
+        }
+
+        if (cull.mode != cur_state.cull.mode) {
+            glCullFace(cull.mode);
+        }
+    } else if (cull.enabled != cur_state.cull.enabled) {
+        glDisable(GL_CULL_FACE);
+    }
+
+    //Depth test
+    if (depth.test_enabled) {
+        if (depth.test_enabled != cur_state.depth.test_enabled) {
+            glEnable(GL_DEPTH_TEST);
+        }
+
+        if (depth.test_func != cur_state.depth.test_func) {
+            glDepthFunc(depth.test_func);
+        }
+    } else if (depth.test_enabled != cur_state.depth.test_enabled) {
+        glDisable(GL_DEPTH_TEST);
+    }
+
+    // Depth mask
+    if (depth.write_mask != cur_state.depth.write_mask) {
+        glDepthMask(depth.write_mask);
+    }
+
+    // Stencil test
+    if (stencil.test_enabled) {
+        if (stencil.test_enabled != cur_state.stencil.test_enabled) {
+            glEnable(GL_STENCIL_TEST);
+        }
+
+        if (stencil.test_func != cur_state.stencil.test_func ||
+            stencil.test_ref != cur_state.stencil.test_ref ||
+            stencil.test_mask != cur_state.stencil.test_mask) {
+            glStencilFunc(stencil.test_func, stencil.test_ref, stencil.test_mask);
+        }
+    } else if (stencil.test_enabled != cur_state.stencil.test_enabled) {
+        glDisable(GL_STENCIL_TEST);
+    }
+
+    // Stencil mask
+    if (stencil.write_mask != cur_state.stencil.write_mask) {
+        glStencilMask(stencil.write_mask);
+    }
+
+    // Blending
+    if (blend.enabled) {
+        if (blend.enabled != cur_state.blend.enabled) {
+            glEnable(GL_BLEND);
+        }
+
+        if (blend.color.red != cur_state.blend.color.red ||
+            blend.color.green != cur_state.blend.color.green ||
+            blend.color.blue != cur_state.blend.color.blue ||
+            blend.color.alpha != cur_state.blend.color.alpha) {
+            glBlendColor(blend.color.red, blend.color.green, blend.color.blue, blend.color.alpha);
+        }
+
+        if (blend.src_rgb_func != cur_state.blend.src_rgb_func ||
+            blend.dst_rgb_func != cur_state.blend.dst_rgb_func ||
+            blend.src_a_func != cur_state.blend.src_a_func ||
+            blend.dst_a_func != cur_state.blend.dst_a_func) {
+            glBlendFuncSeparate(blend.src_rgb_func, blend.dst_rgb_func, blend.src_a_func, blend.dst_a_func);
+        }
+    } else if (blend.enabled != cur_state.blend.enabled) {
+        glDisable(GL_BLEND);
+    }
+
+    // Textures
+    for (int i = 0; i < 3; i++) {
+        if (texture_unit[i].enabled_2d) {
+            if (texture_unit[i].enabled_2d != texture_unit[i].enabled_2d) {
+                glActiveTexture(GL_TEXTURE0 + i);
+                glEnable(GL_TEXTURE_2D);
+            }
+
+            if (texture_unit[i].texture_2d != cur_state.texture_unit[i].texture_2d) {
+                glActiveTexture(GL_TEXTURE0 + i);
+                glBindTexture(GL_TEXTURE_2D, texture_unit[i].texture_2d);
+            }
+        }
+        else if (texture_unit[i].enabled_2d != cur_state.texture_unit[i].enabled_2d) {
+            glActiveTexture(GL_TEXTURE0 + i);
+            glDisable(GL_TEXTURE_2D);
+        }
+    }
+
+    // Framebuffer
+    if (draw.framebuffer != cur_state.draw.framebuffer) {
+        glBindFramebuffer(GL_FRAMEBUFFER, draw.framebuffer);
+    }
+
+    // Vertex array
+    if (draw.vertex_array != cur_state.draw.vertex_array) {
+        glBindVertexArray(draw.vertex_array);
+    }
+
+    // Vertex buffer
+    if (draw.vertex_buffer != cur_state.draw.vertex_buffer) {
+        glBindBuffer(GL_ARRAY_BUFFER, draw.vertex_buffer);
+    }
+
+    // Shader program
+    if (draw.shader_program != cur_state.draw.shader_program) {
+        glUseProgram(draw.shader_program);
+    }
+
+    cur_state = *this;
+}

src/video_core/renderer_opengl/gl_state.h

@@ -0,0 +1,69 @@
+// Copyright 2015 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "generated/gl_3_2_core.h"
+
+class OpenGLState {
+public:
+    struct {
+        bool enabled; // GL_CULL_FACE
+        GLenum mode; // GL_CULL_FACE_MODE
+    } cull;
+
+    struct {
+        bool test_enabled; // GL_DEPTH_TEST
+        GLenum test_func; // GL_DEPTH_FUNC
+        GLboolean write_mask; // GL_DEPTH_WRITEMASK
+    } depth;
+
+    struct {
+        bool test_enabled; // GL_STENCIL_TEST
+        GLenum test_func; // GL_STENCIL_FUNC
+        GLint test_ref; // GL_STENCIL_REF
+        GLuint test_mask; // GL_STENCIL_VALUE_MASK
+        GLuint write_mask; // GL_STENCIL_WRITEMASK
+    } stencil;
+
+    struct {
+        bool enabled; // GL_BLEND
+        GLenum src_rgb_func; // GL_BLEND_SRC_RGB
+        GLenum dst_rgb_func; // GL_BLEND_DST_RGB
+        GLenum src_a_func; // GL_BLEND_SRC_ALPHA
+        GLenum dst_a_func; // GL_BLEND_DST_ALPHA
+
+        struct {
+            GLclampf red;
+            GLclampf green;
+            GLclampf blue;
+            GLclampf alpha;
+        } color; // GL_BLEND_COLOR
+    } blend;
+
+    struct {
+        bool enabled_2d; // GL_TEXTURE_2D
+        GLuint texture_2d; // GL_TEXTURE_BINDING_2D
+    } texture_unit[3];
+
+    struct {
+        GLuint framebuffer; // GL_DRAW_FRAMEBUFFER_BINDING
+        GLuint vertex_array; // GL_VERTEX_ARRAY_BINDING
+        GLuint vertex_buffer; // GL_ARRAY_BUFFER_BINDING
+        GLuint shader_program; // GL_CURRENT_PROGRAM
+    } draw;
+
+    OpenGLState();
+
+    /// Get the currently active OpenGL state
+    static OpenGLState GetCurState() {
+        return cur_state;
+    }
+    
+    /// Apply this state as the current OpenGL state
+    void Apply();
+
+private:
+    static OpenGLState cur_state;
+};

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -53,18 +53,22 @@ static std::array<GLfloat, 3*2> MakeOrthographicMatrix(const float width, const
 
 /// RendererOpenGL constructor
 RendererOpenGL::RendererOpenGL() {
+    hw_rasterizer = new RasterizerOpenGL();
     resolution_width  = std::max(VideoCore::kScreenTopWidth, VideoCore::kScreenBottomWidth);
     resolution_height = VideoCore::kScreenTopHeight + VideoCore::kScreenBottomHeight;
 }
 
 /// RendererOpenGL destructor
 RendererOpenGL::~RendererOpenGL() {
+    delete hw_rasterizer;
 }
 
 /// Swap buffers (render frame)
 void RendererOpenGL::SwapBuffers() {
     render_window->MakeCurrent();
 
+    state.Apply();
+
     for(int i : {0, 1}) {
         const auto& framebuffer = GPU::g_regs.framebuffer_config[i];
 
@@ -75,7 +79,7 @@ void RendererOpenGL::SwapBuffers() {
         LCD::Read(color_fill.raw, lcd_color_addr);
 
         if (color_fill.is_enabled) {
-            LoadColorToActiveGLTexture(color_fill.color_r, color_fill.color_g, color_fill.color_b, textures[i]);
+            LoadColorToActiveGLTexture(state, color_fill.color_r, color_fill.color_g, color_fill.color_b, textures[i]);
 
             // Resize the texture in case the framebuffer size has changed
             textures[i].width = 1;
@@ -87,9 +91,9 @@ void RendererOpenGL::SwapBuffers() {
                 // Reallocate texture if the framebuffer size has changed.
                 // This is expected to not happen very often and hence should not be a
                 // performance problem.
-                ConfigureFramebufferTexture(textures[i], framebuffer);
+                ConfigureFramebufferTexture(state, textures[i], framebuffer);
             }
-            LoadFBToActiveGLTexture(framebuffer, textures[i]);
+            LoadFBToActiveGLTexture(state, framebuffer, textures[i]);
 
             // Resize the texture in case the framebuffer size has changed
             textures[i].width = framebuffer.width;
@@ -116,7 +120,7 @@ void RendererOpenGL::SwapBuffers() {
 /**
  * Loads framebuffer from emulated memory into the active OpenGL texture.
  */
-void RendererOpenGL::LoadFBToActiveGLTexture(const GPU::Regs::FramebufferConfig& framebuffer,
+void RendererOpenGL::LoadFBToActiveGLTexture(OpenGLState &state, const GPU::Regs::FramebufferConfig& framebuffer,
                                              const TextureInfo& texture) {
 
     const PAddr framebuffer_addr = framebuffer.active_fb == 0 ?
@@ -139,7 +143,11 @@ void RendererOpenGL::LoadFBToActiveGLTexture(const GPU::Regs::FramebufferConfig&
     // only allows rows to have a memory alignement of 4.
     ASSERT(pixel_stride % 4 == 0);
 
-    glBindTexture(GL_TEXTURE_2D, texture.handle);
+    state.texture_unit[0].enabled_2d = true;
+    state.texture_unit[0].texture_2d = texture.handle;
+    state.Apply();
+    
+    glActiveTexture(GL_TEXTURE0);
     glPixelStorei(GL_UNPACK_ROW_LENGTH, (GLint)pixel_stride);
 
     // Update existing texture
@@ -151,7 +159,6 @@ void RendererOpenGL::LoadFBToActiveGLTexture(const GPU::Regs::FramebufferConfig&
                     texture.gl_format, texture.gl_type, framebuffer_data);
 
     glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
-    glBindTexture(GL_TEXTURE_2D, 0);
 }
 
 /**
@@ -159,15 +166,17 @@ void RendererOpenGL::LoadFBToActiveGLTexture(const GPU::Regs::FramebufferConfig&
  * Since the color is solid, the texture can be 1x1 but will stretch across whatever it's rendered on.
  * This has the added benefit of being *really fast*.
  */
-void RendererOpenGL::LoadColorToActiveGLTexture(u8 color_r, u8 color_g, u8 color_b,
+void RendererOpenGL::LoadColorToActiveGLTexture(OpenGLState &state, u8 color_r, u8 color_g, u8 color_b,
                                                 const TextureInfo& texture) {
-    glBindTexture(GL_TEXTURE_2D, texture.handle);
+    state.texture_unit[0].enabled_2d = true;
+    state.texture_unit[0].texture_2d = texture.handle;
+    state.Apply();
 
+    glActiveTexture(GL_TEXTURE0);
     u8 framebuffer_data[3] = { color_r, color_g, color_b };
 
     // Update existing texture
     glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 1, 1, 0, GL_RGB, GL_UNSIGNED_BYTE, framebuffer_data);
-    glBindTexture(GL_TEXTURE_2D, 0);
 }
 
 /**
@@ -175,7 +184,8 @@ void RendererOpenGL::LoadColorToActiveGLTexture(u8 color_r, u8 color_g, u8 color
  */
 void RendererOpenGL::InitOpenGLObjects() {
     glClearColor(Settings::values.bg_red, Settings::values.bg_green, Settings::values.bg_blue, 0.0f);
-    glDisable(GL_DEPTH_TEST);
+    state.depth.test_enabled = false;
+    state.texture_unit[0].enabled_2d = true;
 
     // Link shaders and get variable locations
     program_id = ShaderUtil::LoadShaders(GLShaders::g_vertex_shader, GLShaders::g_fragment_shader);
@@ -189,10 +199,12 @@ void RendererOpenGL::InitOpenGLObjects() {
 
     // Generate VAO
     glGenVertexArrays(1, &vertex_array_handle);
-    glBindVertexArray(vertex_array_handle);
+
+    state.draw.vertex_array = vertex_array_handle;
+    state.draw.vertex_buffer = vertex_buffer_handle;
+    state.Apply();
 
     // Attach vertex data to VAO
-    glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer_handle);
     glBufferData(GL_ARRAY_BUFFER, sizeof(ScreenRectVertex) * 4, nullptr, GL_STREAM_DRAW);
     glVertexAttribPointer(attrib_position,  2, GL_FLOAT, GL_FALSE, sizeof(ScreenRectVertex), (GLvoid*)offsetof(ScreenRectVertex, position));
     glVertexAttribPointer(attrib_tex_coord, 2, GL_FLOAT, GL_FALSE, sizeof(ScreenRectVertex), (GLvoid*)offsetof(ScreenRectVertex, tex_coord));
@@ -206,17 +218,22 @@ void RendererOpenGL::InitOpenGLObjects() {
         // Allocation of storage is deferred until the first frame, when we
         // know the framebuffer size.
 
-        glBindTexture(GL_TEXTURE_2D, texture.handle);
+        state.texture_unit[0].enabled_2d = true;
+        state.texture_unit[0].texture_2d = texture.handle;
+        state.Apply();
+
+        glActiveTexture(GL_TEXTURE0);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
     }
-    glBindTexture(GL_TEXTURE_2D, 0);
+
+    hw_rasterizer->InitObjects();
 }
 
-void RendererOpenGL::ConfigureFramebufferTexture(TextureInfo& texture,
+void RendererOpenGL::ConfigureFramebufferTexture(OpenGLState &state, TextureInfo& texture,
                                                  const GPU::Regs::FramebufferConfig& framebuffer) {
     GPU::Regs::PixelFormat format = framebuffer.color_format;
     GLint internal_format;
@@ -264,7 +281,11 @@ void RendererOpenGL::ConfigureFramebufferTexture(TextureInfo& texture,
         UNIMPLEMENTED();
     }
 
-    glBindTexture(GL_TEXTURE_2D, texture.handle);
+    state.texture_unit[0].enabled_2d = true;
+    state.texture_unit[0].texture_2d = texture.handle;
+    state.Apply();
+
+    glActiveTexture(GL_TEXTURE0);
     glTexImage2D(GL_TEXTURE_2D, 0, internal_format, texture.width, texture.height, 0,
             texture.gl_format, texture.gl_type, nullptr);
 }
@@ -280,8 +301,10 @@ void RendererOpenGL::DrawSingleScreenRotated(const TextureInfo& texture, float x
         ScreenRectVertex(x+w, y+h, 0.f, 1.f),
     };
 
-    glBindTexture(GL_TEXTURE_2D, texture.handle);
+    state.texture_unit[0].enabled_2d = true;
-    glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer_handle);
+    state.texture_unit[0].texture_2d = texture.handle;
+    state.Apply();
+
     glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices.data());
     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 }
@@ -295,7 +318,8 @@ void RendererOpenGL::DrawScreens() {
     glViewport(0, 0, layout.width, layout.height);
     glClear(GL_COLOR_BUFFER_BIT);
 
-    glUseProgram(program_id);
+    state.draw.shader_program = program_id;
+    state.Apply();
 
     // Set projection matrix
     std::array<GLfloat, 3 * 2> ortho_matrix = MakeOrthographicMatrix((float)layout.width,
@@ -324,6 +348,7 @@ void RendererOpenGL::UpdateFramerate() {
  */
 void RendererOpenGL::SetWindow(EmuWindow* window) {
     render_window = window;
+    hw_rasterizer->SetWindow(window);
 }
 
 /// Initialize the renderer

src/video_core/renderer_opengl/renderer_opengl.h

@@ -13,6 +13,8 @@
 #include "core/hw/gpu.h"
 
 #include "video_core/renderer_base.h"
+#include "video_core/renderer_opengl/gl_state.h"
+#include "video_core/renderer_opengl/gl_rasterizer.h"
 
 class EmuWindow;
 
@@ -49,17 +51,17 @@ private:
     };
 
     void InitOpenGLObjects();
-    static void ConfigureFramebufferTexture(TextureInfo& texture,
+    static void ConfigureFramebufferTexture(OpenGLState &state, TextureInfo& texture,
                                             const GPU::Regs::FramebufferConfig& framebuffer);
     void DrawScreens();
     void DrawSingleScreenRotated(const TextureInfo& texture, float x, float y, float w, float h);
     void UpdateFramerate();
 
     // Loads framebuffer from emulated memory into the active OpenGL texture.
-    static void LoadFBToActiveGLTexture(const GPU::Regs::FramebufferConfig& framebuffer,
+    static void LoadFBToActiveGLTexture(OpenGLState &state, const GPU::Regs::FramebufferConfig& framebuffer,
                                         const TextureInfo& texture);
     // Fills active OpenGL texture with the given RGB color.
-    static void LoadColorToActiveGLTexture(u8 color_r, u8 color_g, u8 color_b,
+    static void LoadColorToActiveGLTexture(OpenGLState &state, u8 color_r, u8 color_g, u8 color_b,
                                            const TextureInfo& texture);
 
     /// Computes the viewport rectangle
@@ -71,6 +73,8 @@ private:
     int resolution_width;                         ///< Current resolution width
     int resolution_height;                        ///< Current resolution height
 
+    OpenGLState state;
+
     // OpenGL object IDs
     GLuint vertex_array_handle;
     GLuint vertex_buffer_handle;