Initial lua API

.gitmodules

@@ -1,3 +1,6 @@
 [submodule "glfw"]
 	path = glfw
 	url = https://git.shylie.info/shylie/glfw.git
+[submodule "Lua"]
+	path = Lua
+	url = https://git.shylie.info/shylie/Lua.git

CMakeLists.txt

@@ -15,11 +15,13 @@ set(GLERMINAL_CELL_SCALE 4 CACHE STRING "")
 configure_file(source/glerminal-config.h.in glerminal-config.h @ONLY)
 
 add_subdirectory(glfw)
+add_subdirectory(Lua)
 
-add_library(glerminal STATIC
+add_library(glerminallib STATIC
 	${CMAKE_CURRENT_BINARY_DIR}/glerminal-config.h
 	include/glerminal.h
 
+	source/stb_image.h
 	source/glerminal-private.h
 	source/glerminal.cpp
 
@@ -28,12 +30,12 @@ add_library(glerminal STATIC
 	source/glad.c
 )
 
-set_target_properties(glerminal
+set_target_properties(glerminallib
 	PROPERTIES
 		CXX_STANDARD 11
 )
 
-target_include_directories(glerminal
+target_include_directories(glerminallib
 	PUBLIC
 		include
 		${CMAKE_CURRENT_BINARY_DIR}
@@ -41,12 +43,12 @@ target_include_directories(glerminal
 		source
 )
 
-target_link_libraries(glerminal
+target_link_libraries(glerminallib
-	PRIVATE
+	PUBLIC
 		glfw
 )
 
-target_compile_definitions(glerminal
+target_compile_definitions(glerminallib
 	PUBLIC
 		GLERMINAL_VERSION=${PROJECT_VERSION}
 		GLERMINAL_VERSION_MAJOR=${PROJECT_VERSION_MAJOR}
@@ -55,12 +57,22 @@ target_compile_definitions(glerminal
 )
 
 if (MSVC)
-	target_link_options(glerminal
+	target_link_options(glerminallib
 		PUBLIC
 			"/ENTRY:mainCRTStartup"
 	)
 endif()
 
+add_executable(glerminal WIN32
+	source/glerminal-main.cpp
+)
+
+target_link_libraries(glerminal
+	PRIVATE
+		glerminallib
+		lua_static
+)	
+
 if (PROJECT_IS_TOP_LEVEL)
 	add_subdirectory(examples examples)
 endif()

Lua

@@ -0,0 +1 @@
+Subproject commit 88246d621abf7b6fba9332f49229d507f020e450

examples/CMakeLists.txt

@@ -12,10 +12,12 @@ file(GLOB_RECURSE
 
 foreach(RESOURCE_FILE ${EXAMPLE_RESOURCES})
 	add_custom_command(
-		OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_FILE}
+		OUTPUT
-		COMMAND ${CMAKE_COMMAND} -E copy
-			${CMAKE_CURRENT_SOURCE_DIR}/${RESOURCE_FILE}
 			${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_FILE}
+		COMMAND
+			${CMAKE_COMMAND} -E copy
+				${CMAKE_CURRENT_SOURCE_DIR}/${RESOURCE_FILE}
+				${CMAKE_CURRENT_BINARY_DIR}/${RESOURCE_FILE}
 		DEPENDS
 			${CMAKE_CURRENT_SOURCE_DIR}/${RESOURCE_FILE}
 	)
@@ -34,5 +36,5 @@ list(TRANSFORM EXAMPLE_RESOURCES PREPEND ${CMAKE_CURRENT_BINARY_DIR}/)
 foreach(SOURCE_FILE ${EXAMPLE_SOURCES})
 	get_filename_component(SOURCE_FILENAME ${SOURCE_FILE} NAME_WLE)
 	add_executable(${SOURCE_FILENAME} WIN32 ${SOURCE_FILE} ${EXAMPLE_RESOURCES})
-	target_link_libraries(${SOURCE_FILENAME} PRIVATE glerminal)
+	target_link_libraries(${SOURCE_FILENAME} PRIVATE glerminallib)
 endforeach()

lua-examples/basic/main.lua

@@ -0,0 +1,29 @@
+local time = 0
+
+function glerminal.init()
+    if not glerminal.sprites('sprites.png') then
+        print('failed to load sprites')
+    end
+
+    for i = 1, 40 do
+        for j = 1, 25 do
+            glerminal.set(i, j, 1, 2)
+        end
+    end
+
+    glerminal.tint(1, 0xA0FFFFFF)
+
+    glerminal.flush()
+end
+
+function glerminal.main(dt)
+    time = time + dt / 2
+
+    for i = 1, 40 do
+        for j = 1, 25 do
+            glerminal.offset(i, j, 1, math.cos(time * i / math.pi), math.sin(time * j / math.pi))
+        end
+    end
+
+    glerminal.flush()
+end

lua-examples/basic/sprites.png

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6dee3efcdfa72e54a602f69643907bb8e8a3328d2b40c2116dce22ff179d8892
+size 182

source/glerminal-main.cpp

@@ -0,0 +1,163 @@
+#include <glerminal.h>
+
+extern "C"
+{
+#include <lualib.h>
+#include <lauxlib.h>
+}
+
+#include <iostream>
+
+#ifdef _WIN32
+#define WINDOWS_LEAN_AND_MEAN
+#include <Windows.h>
+#define CHANGE_WORKING_DIRECTORY(path) !(SetCurrentDirectory(path))
+#else
+#include <unistd.h>
+#define CHANGE_WORKING_DIRECTORY(path) chdir(path)
+#endif
+
+namespace
+{
+	int lglerminal_quit(lua_State* L)
+	{
+		glerminal_quit();
+
+		return 0;
+	}
+
+	int lglerminal_flush(lua_State* L)
+	{
+		glerminal_flush();
+
+		return 0;
+	}
+
+	int lglerminal_set(lua_State* L)
+	{
+		const unsigned char x = luaL_checkinteger(L, 1) - 1;
+		const unsigned char y = luaL_checkinteger(L, 2) - 1;
+		const unsigned char layer = luaL_checkinteger(L, 3) - 1;
+		const unsigned char sprite = luaL_checkinteger(L, 4) - 1;
+		glerminal_set(x, y, layer, sprite);
+
+		return 0;
+	}
+
+	int lglerminal_get(lua_State* L)
+	{
+		const unsigned char x = luaL_checkinteger(L, 1) - 1;
+		const unsigned char y = luaL_checkinteger(L, 2) - 1;
+		const unsigned char layer = luaL_checkinteger(L, 3) - 1;
+		lua_pushnumber(L, glerminal_get(x, y, layer) + 1);
+
+		return 1;
+	}
+
+	int lglerminal_offset(lua_State* L)
+	{
+		const unsigned char x = luaL_checkinteger(L, 1) - 1;
+		const unsigned char y = luaL_checkinteger(L, 2) - 1;
+		const unsigned char layer = luaL_checkinteger(L, 3) - 1;
+		const float ox = luaL_checknumber(L, 4);
+		const float oy = luaL_checknumber(L, 5);
+		glerminal_offset(x, y, layer, ox, oy);
+
+		return 0;
+	}
+
+	int lglerminal_layer_color(lua_State* L)
+	{
+		const unsigned char layer = luaL_checkinteger(L, 1) - 1;
+		const unsigned int color = luaL_checkinteger(L, 2);
+		glerminal_layer_color(layer, color);
+
+		return 0;
+	}
+
+	int lglerminal_layer_scale(lua_State* L)
+	{
+		const unsigned char layer = luaL_checkinteger(L, 1) - 1;
+		const float scale = luaL_checknumber(L, 2);
+		glerminal_layer_scale(layer, scale);
+
+		return 0;
+	}
+
+	int lglerminal_load_sprites_file(lua_State* L)
+	{
+		const char* path = luaL_checkstring(L, 1);
+		lua_pushboolean(L, glerminal_load_sprites_file(path));
+
+		return 1;
+	}
+
+	const luaL_Reg lglerminal_methods[] =
+	{
+		{ "quit",    lglerminal_quit },
+		{ "flush",   lglerminal_flush },
+		{ "set",     lglerminal_set },
+		{ "get",     lglerminal_get },
+		{ "offset",  lglerminal_offset },
+		{ "tint",    lglerminal_layer_color },
+		{ "scale",   lglerminal_layer_scale },
+		{ "sprites", lglerminal_load_sprites_file },
+		{ nullptr,   nullptr }
+	};
+
+	lua_State* L;
+
+	void init()
+	{
+		lua_getglobal(L, "glerminal");
+		lua_getfield(L, -1, "init");
+		lua_remove(L, -2);
+		if (lua_pcall(L, 0, 0, 0) != LUA_OK)
+		{
+			// ignore error for now
+			lua_remove(L, -1);
+		}
+	}
+
+	void mainloop(float dt)
+	{
+		lua_getglobal(L, "glerminal");
+		lua_getfield(L, -1, "main");
+		lua_remove(L, -2);
+		lua_pushnumber(L, dt);
+		if (lua_pcall(L, 1, 0, 0) != LUA_OK)
+		{
+			// ignore error for now
+			lua_remove(L, -1);
+		}
+	}
+}
+
+int main(int argc, char** argv)
+{
+	if (argc == 1)
+	{
+		std::cout << "Usage: " << argv[0] << " <project directory>" << std::endl;
+		return 0;
+	}
+
+	if (CHANGE_WORKING_DIRECTORY(argv[1]))
+	{
+		std::cout << "Failed to find project directory" << std::endl;
+		return 1;
+	}
+
+	L = luaL_newstate();
+	luaL_openlibs(L);
+
+	luaL_newlib(L, lglerminal_methods);
+	lua_setglobal(L, "glerminal");
+
+	luaL_dofile(L, "main.lua");
+
+	glerminal_run(init, mainloop);
+
+	lua_close(L);
+
+	return 0;
+}

source/glerminal.cpp

@@ -35,9 +35,14 @@ namespace
 		"{\n"
 		"	float scales[];\n"
 		"} lss;\n"
+		"layout (std430, binding = 1) buffer LayerColors"
+		"{\n"
+		"	vec4 colors[];\n"
+		"} lcs;\n"
 		"out VS_OUT {\n"
 		"	flat int sprite;\n"
 		"	flat int layer;\n"
+		"	flat vec4 layer_color;\n"
 		"	vec2 texcoord;\n"
 		"} vs_out;\n"
 		"void main()\n"
@@ -46,6 +51,7 @@ namespace
 		"	vec2 scaled_offset = 2 * offset * " GRID_SIZE_UNIFORM_NAME ".zw;\n"
 		"	vs_out.sprite = sprite;\n"
 		"	vs_out.layer = layer;\n"
+		"	vs_out.layer_color = lcs.colors[layer];\n"
 		"	vs_out.texcoord = vec2(position.x + 1, -position.y);\n"
 		"	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"
 		"	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"
@@ -65,8 +71,13 @@ namespace
 		"{\n"
 		"	float scales[];\n"
 		"} lss;\n"
+		"layout (std430, binding = 1) buffer LayerColors"
+		"{\n"
+		"	vec4 colors[];\n"
+		"} lcs;\n"
 		"out VS_OUT {\n"
 		"	flat int sprite;\n"
+		"	flat vec4 layer_color;\n"
 		"	vec2 texcoord;\n"
 		"} vs_out;\n"
 		"void main()\n"
@@ -76,6 +87,7 @@ namespace
 		"	vec2 scaled_offset = 2 * offset * " GRID_SIZE_UNIFORM_NAME ".zw;\n"
 		"	vs_out.sprite = sprite;\n"
 		"	vs_out.texcoord = vec2(position.x + 1, -position.y);\n"
+		"	vs_out.layer_color = lcs.colors[layer];\n"
 		"	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"
 		"	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"
 		"	gl_Position = vec4(scaled_offset.x + temp.x, scaled_offset.y - temp.y, 0, 1);\n"
@@ -91,25 +103,30 @@ namespace
 		"in VS_OUT {\n"
 		"	flat int sprite;\n"
 		"	flat int layer;\n"
+		"	flat vec4 layer_color;\n"
 		"	vec2 texcoord;\n"
 		"} gs_in[];\n"
 		"flat out int sprite;\n"
+		"flat vec4 layer_color;\n"
 		"out vec2 texcoord;\n"
 		"void main()\n"
 		"{\n"
 		"	gl_Layer = gs_in[0].layer;\n"
 		"	gl_Position = gl_in[0].gl_Position;\n"
 		"	sprite = gs_in[0].sprite;\n"
+		"	layer_color = gs_in[0].layer_color;\n"
 		"	texcoord = gs_in[0].texcoord;\n"
 		"	EmitVertex();\n"
 		"	gl_Layer = gs_in[1].layer;\n"
 		"	gl_Position = gl_in[1].gl_Position;\n"
 		"	sprite = gs_in[1].sprite;\n"
+		"	layer_color = gs_in[1].layer_color;\n"
 		"	texcoord = gs_in[1].texcoord;\n"
 		"	EmitVertex();\n"
 		"	gl_Layer = gs_in[2].layer;\n"
 		"	gl_Position = gl_in[2].gl_Position;\n"
 		"	sprite = gs_in[2].sprite;\n"
+		"	layer_color = gs_in[2].layer_color;\n"
 		"	texcoord = gs_in[2].texcoord;\n"
 		"	EmitVertex();\n"
 		"	EndPrimitive();\n"
@@ -119,13 +136,14 @@ namespace
 
 	constexpr char FRAGMENT_SHADER_SOURCE[] =
 		"#version 450 core\n"
-		"in vec2 texcoord;\n"
 		"flat in int sprite;\n"
+		"flat vec4 layer_color;\n"
+		"in vec2 texcoord;\n"
 		"layout (binding = 0) uniform sampler2DArray " SPRITES_UNIFORM_NAME ";\n"
 		"out vec4 FragColor;\n"
 		"void main()\n"
 		"{\n"
-		"	FragColor = texture(" SPRITES_UNIFORM_NAME ", vec3(texcoord, sprite));\n"
+		"	FragColor = layer_color * texture(" SPRITES_UNIFORM_NAME ", vec3(texcoord, sprite));\n"
 		"}";
 
 	// note: AMD_vertex_shader_layer support required
@@ -133,13 +151,14 @@ namespace
 		"#version 450 core\n"
 		"in VS_OUT {\n"
 		"	flat int sprite;\n"
+		"	flat vec4 layer_color;\n"
 		"	vec2 texcoord;\n"
 		"} fs_in;\n"
 		"layout (binding = 0) uniform sampler2DArray " SPRITES_UNIFORM_NAME ";\n"
 		"out vec4 FragColor;\n"
 		"void main()\n"
 		"{\n"
-		"	FragColor = texture(" SPRITES_UNIFORM_NAME ", vec3(fs_in.texcoord, fs_in.sprite));\n"
+		"	FragColor = fs_in.layer_color * texture(" SPRITES_UNIFORM_NAME ", vec3(fs_in.texcoord, fs_in.sprite));\n"
 		"}";
 
 	constexpr const char* FRAGMENT_SHADER_SOURCE_PTR = FRAGMENT_SHADER_SOURCE;
@@ -161,10 +180,6 @@ namespace
 		"#version 450 core\n"
 		"in vec2 texcoord;\n"
 		"layout (binding = 1) uniform sampler2DArray " LAYERS_UNIFORM_NAME ";\n"
-		"layout (std430, binding = 1) buffer LayerColors"
-		"{\n"
-		"	vec4 colors[];\n"
-		"} lcs;\n"
 		"uniform int " LAYER_COUNT_UNIFORM_NAME ";\n"
 		"out vec4 FragColor;\n"
 		"void main()\n"
@@ -172,7 +187,7 @@ namespace
 		"	vec3 current_color = vec3(0);\n"
 		"	for (int i = 0; i < " LAYER_COUNT_UNIFORM_NAME "; i++)\n"
 		"	{\n"
-		"		vec4 texsample = lcs.colors[i] * texture(" LAYERS_UNIFORM_NAME ", vec3(texcoord, i));\n"
+		"		vec4 texsample = texture(" LAYERS_UNIFORM_NAME ", vec3(texcoord, i));\n"
 		"		current_color = mix(current_color, texsample.rgb, texsample.a);\n"
 		"	}\n"
 		"	FragColor = vec4(current_color, 1);\n"
@@ -222,6 +237,8 @@ namespace glerminal
 		GLERMINAL_G = this;
 
 		init();
+
+		glerminal_flush();
 	}
 
 	glerminal::~glerminal()
@@ -527,8 +544,8 @@ namespace glerminal
 			glDeleteShader(geometry_shader);
 			glDeleteShader(fragment_shader);
 
-			log(GL_DEBUG_TYPE_ERROR, 0, 0, "Could not compile vertex shader.");
+			log(GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, "Could not compile vertex shader.");
-			log(GL_DEBUG_TYPE_ERROR, 0, 0, info_log);
+			log(GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, info_log);
 			throw std::runtime_error("Could not compile vertex shader.");
 		}
 
@@ -541,8 +558,8 @@ namespace glerminal
 			glDeleteShader(geometry_shader);
 			glDeleteShader(fragment_shader);
 
-			log(GL_DEBUG_TYPE_ERROR, 1, 0, "Could not compile geometry shader.");
+			log(GL_DEBUG_TYPE_ERROR, 1, GL_DEBUG_SEVERITY_HIGH, "Could not compile geometry shader.");
-			log(GL_DEBUG_TYPE_ERROR, 1, 0, info_log);
+			log(GL_DEBUG_TYPE_ERROR, 1, GL_DEBUG_SEVERITY_HIGH, info_log);
 			throw std::runtime_error("Could not compile geometry shader.");
 		}
 
@@ -555,8 +572,8 @@ namespace glerminal
 			glDeleteShader(geometry_shader);
 			glDeleteShader(fragment_shader);
 
-			log(GL_DEBUG_TYPE_ERROR, 2, 0, "Could not compile fragment shader.");
+			log(GL_DEBUG_TYPE_ERROR, 2, GL_DEBUG_SEVERITY_HIGH, "Could not compile fragment shader.");
-			log(GL_DEBUG_TYPE_ERROR, 2, 0, info_log);
+			log(GL_DEBUG_TYPE_ERROR, 2, GL_DEBUG_SEVERITY_HIGH, info_log);
 			throw std::runtime_error("Could not compile fragment shader.");
 		}
 
@@ -582,8 +599,8 @@ namespace glerminal
 
 			glDeleteProgram(m_program);
 
-			log(GL_DEBUG_TYPE_ERROR, 3, 0, "Could not link shader program.");
+			log(GL_DEBUG_TYPE_ERROR, 3, GL_DEBUG_SEVERITY_HIGH, "Could not link shader program.");
-			log(GL_DEBUG_TYPE_ERROR, 3, 0, info_log);
+			log(GL_DEBUG_TYPE_ERROR, 3, GL_DEBUG_SEVERITY_HIGH, info_log);
 			throw std::runtime_error("Could not link shader program.");
 		}
 
@@ -611,8 +628,8 @@ namespace glerminal
 			glDeleteShader(screen_vertex_shader);
 			glDeleteShader(screen_fragment_shader);
 
-			log(GL_DEBUG_TYPE_ERROR, 4, 0, "Could not compile screen vertex shader.");
+			log(GL_DEBUG_TYPE_ERROR, 4, GL_DEBUG_SEVERITY_HIGH, "Could not compile screen vertex shader.");
-			log(GL_DEBUG_TYPE_ERROR, 4, 0, info_log);
+			log(GL_DEBUG_TYPE_ERROR, 4, GL_DEBUG_SEVERITY_HIGH, info_log);
 			throw std::runtime_error("Could not compile screen vertex shader.");
 		}
 
@@ -624,8 +641,8 @@ namespace glerminal
 			glDeleteShader(screen_vertex_shader);
 			glDeleteShader(screen_fragment_shader);
 
-			log(GL_DEBUG_TYPE_ERROR, 5, 0, "Could not compile screen fragment shader.");
+			log(GL_DEBUG_TYPE_ERROR, 5, GL_DEBUG_SEVERITY_HIGH, "Could not compile screen fragment shader.");
-			log(GL_DEBUG_TYPE_ERROR, 5, 0, info_log);
+			log(GL_DEBUG_TYPE_ERROR, 5, GL_DEBUG_SEVERITY_HIGH, info_log);
 			throw std::runtime_error("Could not compile screen fragment shader.");
 		}
 
@@ -643,8 +660,8 @@ namespace glerminal
 		{
 			glDeleteProgram(m_screen_program);
 
-			log(GL_DEBUG_TYPE_ERROR, 6, 0, "Could not link screen shader program.");
+			log(GL_DEBUG_TYPE_ERROR, 6, GL_DEBUG_SEVERITY_HIGH, "Could not link screen shader program.");
-			log(GL_DEBUG_TYPE_ERROR, 6, 0, info_log);
+			log(GL_DEBUG_TYPE_ERROR, 6, GL_DEBUG_SEVERITY_HIGH, info_log);
 			throw std::runtime_error("Could not link screen shader program.");
 		}
 

tests/CMakeLists.txt

@@ -52,5 +52,5 @@ list(TRANSFORM TEST_RESOURCES PREPEND ${CMAKE_CURRENT_BINARY_DIR}/)
 foreach(SOURCE_FILE ${TEST_SOURCES})
 	get_filename_component(SOURCE_FILENAME ${SOURCE_FILE} NAME_WLE)
 	add_executable(test-${SOURCE_FILENAME} WIN32 ${SOURCE_FILE} ${TEST_RESOURCES})
-	target_link_libraries(test-${SOURCE_FILENAME} PRIVATE glerminal test-common)
+	target_link_libraries(test-${SOURCE_FILENAME} PRIVATE glerminallib test-common)
 endforeach()