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https://git.shylie.info/shylie/glerminal.git
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Add AMD_vertex_shader_layer support
This commit is contained in:
Shylie
parent
c125a36cf0
commit
2be0aeaf99
@ -1,22 +1,22 @@
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/*
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OpenGL loader generated by glad 0.1.36 on Sun May 26 12:09:35 2024.
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OpenGL loader generated by glad 0.1.36 on Sun May 26 16:07:25 2024.
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Language/Generator: C/C++
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Specification: gl
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APIs: gl=4.5
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Profile: core
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Extensions:
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GL_AMD_vertex_shader_layer
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Loader: True
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Local files: False
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Omit khrplatform: False
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Reproducible: False
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Commandline:
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--profile="core" --api="gl=4.5" --generator="c" --spec="gl" --extensions=""
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--profile="core" --api="gl=4.5" --generator="c" --spec="gl" --extensions="GL_AMD_vertex_shader_layer"
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Online:
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https://glad.dav1d.de/#profile=core&language=c&specification=gl&loader=on&api=gl%3D4.5
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https://glad.dav1d.de/#profile=core&language=c&specification=gl&loader=on&api=gl%3D4.5&extensions=GL_AMD_vertex_shader_layer
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*/
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#include <stdio.h>
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@ -968,6 +968,7 @@ PFNGLVIEWPORTARRAYVPROC glad_glViewportArrayv = NULL;
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PFNGLVIEWPORTINDEXEDFPROC glad_glViewportIndexedf = NULL;
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PFNGLVIEWPORTINDEXEDFVPROC glad_glViewportIndexedfv = NULL;
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PFNGLWAITSYNCPROC glad_glWaitSync = NULL;
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int GLAD_GL_AMD_vertex_shader_layer = 0;
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static void load_GL_VERSION_1_0(GLADloadproc load) {
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if(!GLAD_GL_VERSION_1_0) return;
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glad_glCullFace = (PFNGLCULLFACEPROC)load("glCullFace");
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@ -1723,7 +1724,7 @@ static void load_GL_VERSION_4_5(GLADloadproc load) {
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}
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static int find_extensionsGL(void) {
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if (!get_exts()) return 0;
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(void)&has_ext;
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GLAD_GL_AMD_vertex_shader_layer = has_ext("GL_AMD_vertex_shader_layer");
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free_exts();
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return 1;
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}
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@ -1,22 +1,22 @@
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/*
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OpenGL loader generated by glad 0.1.36 on Sun May 26 12:09:35 2024.
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OpenGL loader generated by glad 0.1.36 on Sun May 26 16:07:25 2024.
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Language/Generator: C/C++
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Specification: gl
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APIs: gl=4.5
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Profile: core
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Extensions:
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GL_AMD_vertex_shader_layer
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Loader: True
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Local files: False
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Omit khrplatform: False
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Reproducible: False
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Commandline:
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--profile="core" --api="gl=4.5" --generator="c" --spec="gl" --extensions=""
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--profile="core" --api="gl=4.5" --generator="c" --spec="gl" --extensions="GL_AMD_vertex_shader_layer"
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Online:
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https://glad.dav1d.de/#profile=core&language=c&specification=gl&loader=on&api=gl%3D4.5
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https://glad.dav1d.de/#profile=core&language=c&specification=gl&loader=on&api=gl%3D4.5&extensions=GL_AMD_vertex_shader_layer
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*/
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@ -3648,6 +3648,10 @@ typedef void (APIENTRYP PFNGLTEXTUREBARRIERPROC)(void);
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GLAPI PFNGLTEXTUREBARRIERPROC glad_glTextureBarrier;
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#define glTextureBarrier glad_glTextureBarrier
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#endif
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#ifndef GL_AMD_vertex_shader_layer
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#define GL_AMD_vertex_shader_layer 1
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GLAPI int GLAD_GL_AMD_vertex_shader_layer;
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#endif
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#ifdef __cplusplus
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}
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@ -7,6 +7,7 @@
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#include <glad/glad.h>
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#include <GLFW/glfw3.h>
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#include <iostream>
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#include <fstream>
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#include <stdexcept>
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@ -52,7 +52,36 @@ namespace
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" gl_Position = vec4(scaled_offset.x + temp.x, scaled_offset.y - temp.y, 0, 1);\n"
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"}";
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// note: AMD_vertex_shader_layer support required
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constexpr char VERTEX_SHADER_AMD_SOURCE[] =
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"#version 450 core\n"
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"#extension GL_AMD_vertex_shader_layer : enable\n"
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"layout (location = 0) in vec2 position;\n"
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"layout (location = 1) in vec2 offset;\n"
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"layout (location = 2) in int sprite;\n"
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"uniform vec4 " GRID_SIZE_UNIFORM_NAME ";\n"
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"layout (std430, binding = 0) buffer LayerScales"
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"{\n"
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" float scales[];\n"
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"} lss;\n"
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"out VS_OUT {\n"
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" flat int sprite;\n"
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" vec2 texcoord;\n"
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"} vs_out;\n"
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"void main()\n"
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"{\n"
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" const int layer = int(floor(gl_InstanceID / " GRID_SIZE_UNIFORM_NAME ".y));\n"
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" gl_Layer = layer;\n"
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" vec2 scaled_offset = 2 * offset * " GRID_SIZE_UNIFORM_NAME ".zw;\n"
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" vs_out.sprite = sprite;\n"
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" vs_out.texcoord = vec2(position.x + 1, -position.y);\n"
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" vec2 cell_position = vec2(lss.scales[layer] + (gl_InstanceID % int(" GRID_SIZE_UNIFORM_NAME ".y)) - " GRID_SIZE_UNIFORM_NAME ".x * floor((gl_InstanceID % int(" GRID_SIZE_UNIFORM_NAME ".y)) * " GRID_SIZE_UNIFORM_NAME ".z), -floor((gl_InstanceID % int(" GRID_SIZE_UNIFORM_NAME ".y)) * " GRID_SIZE_UNIFORM_NAME ".z));\n"
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" vec2 temp = ((position + vec2(-0.5, 0.5)) * lss.scales[layer] + cell_position + vec2(0.5, -0.5)) * " GRID_SIZE_UNIFORM_NAME ".zw * 2 + vec2(-1, 1);\n"
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" gl_Position = vec4(scaled_offset.x + temp.x, scaled_offset.y - temp.y, 0, 1);\n"
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"}";
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constexpr const char* VERTEX_SHADER_SOURCE_PTR = VERTEX_SHADER_SOURCE;
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constexpr const char* VERTEX_SHADER_AMD_SOURCE_PTR = VERTEX_SHADER_AMD_SOURCE;
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constexpr char GEOMETRY_SHADER_SOURCE[] =
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"#version 450 core\n"
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@ -98,7 +127,22 @@ namespace
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" FragColor = texture(" SPRITES_UNIFORM_NAME ", vec3(texcoord, sprite));\n"
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"}";
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// note: AMD_vertex_shader_layer support required
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constexpr char FRAGMENT_SHADER_AMD_SOURCE[] =
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"#version 450 core\n"
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"in VS_OUT {\n"
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" flat int sprite;\n"
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" vec2 texcoord;\n"
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"} fs_in;\n"
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"layout (binding = 0) uniform sampler2DArray " SPRITES_UNIFORM_NAME ";\n"
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"out vec4 FragColor;\n"
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"void main()\n"
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"{\n"
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" FragColor = texture(" SPRITES_UNIFORM_NAME ", vec3(fs_in.texcoord, fs_in.sprite));\n"
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"}";
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constexpr const char* FRAGMENT_SHADER_SOURCE_PTR = FRAGMENT_SHADER_SOURCE;
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constexpr const char* FRAGMENT_SHADER_AMD_SOURCE_PTR = FRAGMENT_SHADER_AMD_SOURCE;
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constexpr char SCREEN_VERTEX_SHADER_SOURCE[] =
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"#version 450 core\n"
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@ -215,14 +259,12 @@ namespace glerminal
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update_layer_colors();
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update_layer_scales();
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glViewport(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
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glUseProgram(m_program);
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glBindFramebuffer(GL_FRAMEBUFFER, m_framebuffer);
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glBindVertexArray(m_vao);
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glClear(GL_COLOR_BUFFER_BIT);
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glDrawArraysInstanced(GL_TRIANGLES, 0, 6, GRID_AREA * LAYER_COUNT);
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glViewport(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
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glUseProgram(m_screen_program);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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glBindVertexArray(m_screen_vao);
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@ -399,6 +441,7 @@ namespace glerminal
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glDisable(GL_DEPTH_TEST);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glViewport(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
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// -- setup vertex data --
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// create vertex buffer object
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@ -450,9 +493,12 @@ namespace glerminal
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glBindBufferBase(GL_SHADER_STORAGE_BUFFER, 1, m_layer_colors_buffer);
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// -- setup shader program --
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// test for features
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const bool vertex_shader_layer_supported = glfwExtensionSupported("GL_AMD_vertex_shader_layer");
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// compile
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const unsigned int vertex_shader = glCreateShader(GL_VERTEX_SHADER);
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glShaderSource(vertex_shader, 1, &VERTEX_SHADER_SOURCE_PTR, nullptr);
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glShaderSource(vertex_shader, 1, &(vertex_shader_layer_supported ? VERTEX_SHADER_AMD_SOURCE_PTR : VERTEX_SHADER_SOURCE_PTR), nullptr);
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glCompileShader(vertex_shader);
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const unsigned int geometry_shader = glCreateShader(GL_GEOMETRY_SHADER);
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@ -460,7 +506,7 @@ namespace glerminal
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glCompileShader(geometry_shader);
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const unsigned int fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(fragment_shader, 1, &FRAGMENT_SHADER_SOURCE_PTR, nullptr);
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glShaderSource(fragment_shader, 1, &(vertex_shader_layer_supported ? FRAGMENT_SHADER_AMD_SOURCE_PTR : FRAGMENT_SHADER_SOURCE_PTR), nullptr);
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glCompileShader(fragment_shader);
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constexpr int INFO_LOG_SIZE = 512;
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@ -507,7 +553,11 @@ namespace glerminal
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// link
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m_program = glCreateProgram();
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glAttachShader(m_program, vertex_shader);
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glAttachShader(m_program, geometry_shader);
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// only need geometry shader if AMD_vertex_shader_layer is not supported
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if (!vertex_shader_layer_supported)
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{
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glAttachShader(m_program, geometry_shader);
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}
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glAttachShader(m_program, fragment_shader);
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glLinkProgram(m_program);
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glDeleteShader(vertex_shader);
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@ -518,6 +568,8 @@ namespace glerminal
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glGetProgramiv(m_program, GL_LINK_STATUS, &success);
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if (!success)
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{
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glGetProgramInfoLog(m_program, INFO_LOG_SIZE, nullptr, info_log);
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glDeleteProgram(m_program);
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throw std::runtime_error("Could not link shader program.");
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@ -673,7 +725,7 @@ void glerminal_run(glerminal_init_cb init, glerminal_main_cb main)
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}
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catch (const std::runtime_error& e)
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{
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e.what();
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std::cout << e.what() << std::endl;
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}
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}
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