Simplify shaders, enable coloring of primitives

Dengine.vcxproj

@@ -126,6 +126,7 @@
     <ClCompile Include="src\Common.c" />
     <ClCompile Include="src\Debug.c" />
     <ClCompile Include="src\dengine.c" />
+    <ClCompile Include="src\Entity.c" />
     <ClCompile Include="src\MemoryArena.c" />
     <ClCompile Include="src\Platform.c" />
     <ClCompile Include="src\Renderer.c" />

Dengine.vcxproj.filters

@@ -54,6 +54,9 @@
     <ClCompile Include="src\Asteroid.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\Entity.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <None Include="data\shaders\default.vert.glsl" />

data/shaders/default.frag.glsl

@@ -1,12 +0,0 @@
-#version 330 core
-in vec3 OurColor;
-in vec2 TexCoord;
-
-out vec4 color;
-
-uniform sampler2D ourTexture1;
-
-void main()
-{
-	color = texture(ourTexture1, TexCoord);
-}

data/shaders/default.vert.glsl

@@ -1,19 +1,9 @@
 #version 330 core
+layout(location = 0) in vec4 data; // (vec2)pos, (vec2)texCoord
 
-layout (location = 0) in vec3 position;
-layout (location = 1) in vec3 color;
-layout (location = 2) in vec2 texCoord;
-
-out vec3 OurColor;
-out vec2 TexCoord;
-
-uniform mat4 model;
-uniform mat4 view;
 uniform mat4 projection;
 
 void main()
 {
-	gl_Position = projection * view * model * vec4(position, 1.0f);
-	OurColor = color;
-	TexCoord = texCoord;
+	gl_Position = projection * vec4(data.xy, 0.0f, 1.0f);
 }

data/shaders/default_no_tex.frag.glsl

@@ -0,0 +1,8 @@
+#version 330 core
+out vec4 color;
+uniform vec4 spriteColor;
+
+void main()
+{
+	color = spriteColor;
+}

data/shaders/default_no_tex.vert.glsl

@@ -0,0 +1,9 @@
+#version 330 core
+layout(location = 0) in vec4 data; // (vec2)pos, (vec2)texCoord
+
+uniform mat4 projection;
+
+void main()
+{
+	gl_Position = projection * vec4(data.xy, 0.0f, 1.0f);
+}

src/AssetManager.c

@@ -918,40 +918,42 @@ INTERNAL GLuint createShaderFromPath(MemoryArena_ *arena, const char *const path
 	return result;
 }
 
-INTERNAL i32 shaderLoadProgram(Shader *const shader, const GLuint vertexShader,
+INTERNAL u32 shaderLoadProgram(const GLuint vertexShader,
                                const GLuint fragmentShader)
 {
-	shader->id = glCreateProgram();
-	glAttachShader(shader->id, vertexShader);
-	glAttachShader(shader->id, fragmentShader);
-	glLinkProgram(shader->id);
+	u32 result = glCreateProgram();
+	glAttachShader(result, vertexShader);
+	glAttachShader(result, fragmentShader);
+	glLinkProgram(result);
+	GL_CHECK_ERROR();
 
 	glDeleteShader(fragmentShader);
 	glDeleteShader(vertexShader);
+	GL_CHECK_ERROR();
 
 	GLint success;
 	GLchar infoLog[512];
-	glGetProgramiv(shader->id, GL_LINK_STATUS, &success);
-	if (!success)
+	glGetProgramiv(result, GL_LINK_STATUS, &success);
+	GL_CHECK_ERROR();
+	if (result == 0)
 	{
-		glGetProgramInfoLog(shader->id, 512, NULL, infoLog);
+		glGetProgramInfoLog(result, 512, NULL, infoLog);
 		printf("glLinkProgram failed: %s\n", infoLog);
-		return -1;
+		ASSERT(TRUE);
 	}
+	GL_CHECK_ERROR();
 
-	return 0;
+	return result;
 }
 
-Shader *const asset_getShader(AssetManager *assetManager,
-                              const enum ShaderList type)
+u32 asset_getShader(AssetManager *assetManager, const enum ShaderList type)
 {
-	if (type < shaderlist_count)
-		return &assetManager->shaders[type];
+	if (type < shaderlist_count) return assetManager->shaders[type];
 
 #ifdef DENGINE_DEBUG
 	ASSERT(INVALID_CODE_PATH);
 #endif
-	return NULL;
+	return -1;
 }
 
 const i32 asset_loadShaderFiles(AssetManager *assetManager, MemoryArena_ *arena,
@@ -963,12 +965,10 @@ const i32 asset_loadShaderFiles(AssetManager *assetManager, MemoryArena_ *arena,
 	GLuint fragmentShader =
 	    createShaderFromPath(arena, fragmentPath, GL_FRAGMENT_SHADER);
 
-	Shader shader;
-	i32 result = shaderLoadProgram(&shader, vertexShader, fragmentShader);
-	if (result)
-		return result;
+	u32 shaderId = shaderLoadProgram(vertexShader, fragmentShader);
+	if (shaderId == 0) return -1;
 
-	assetManager->shaders[type] = shader;
+	assetManager->shaders[type] = shaderId;
 	return 0;
 }
 

src/Asteroid.c

@@ -32,9 +32,13 @@ void initAssetManager(GameState *state)
 	*tex         = texture_gen(1, 1, 4, CAST(u8 *)(&bitmap));
 
 	/* Load shaders */
-	asset_loadShaderFiles(assetManager, arena, "data/shaders/sprite.vert.glsl",
-	                      "data/shaders/sprite.frag.glsl",
-	                      shaderlist_sprite);
+	asset_loadShaderFiles(
+	    assetManager, arena, "data/shaders/default_tex.vert.glsl",
+	    "data/shaders/default_tex.frag.glsl", shaderlist_default);
+
+	asset_loadShaderFiles(
+	    assetManager, arena, "data/shaders/default_no_tex.vert.glsl",
+	    "data/shaders/default_no_tex.frag.glsl", shaderlist_default_no_tex);
 
 	i32 result =
 	    asset_loadTTFont(assetManager, arena, "C:/Windows/Fonts/Arialbd.ttf");
@@ -52,12 +56,19 @@ void initRenderer(GameState *state, v2 windowSize) {
 	// NOTE(doyle): Value to map a screen coordinate to NDC coordinate
 	renderer->vertexNdcFactor =
 	    V2(1.0f / renderer->size.w, 1.0f / renderer->size.h);
-	renderer->shader = asset_getShader(assetManager, shaderlist_sprite);
-	shader_use(renderer->shader);
 
 	const mat4 projection =
 	    mat4_ortho(0.0f, renderer->size.w, 0.0f, renderer->size.h, 0.0f, 1.0f);
-	shader_uniformSetMat4fv(renderer->shader, "projection", projection);
+	for (i32 i = 0; i < shaderlist_count; i++)
+	{
+		renderer->shaderList[i] = asset_getShader(assetManager, i);
+		shader_use(renderer->shaderList[i]);
+		shader_uniformSetMat4fv(renderer->shaderList[i], "projection",
+		                        projection);
+		GL_CHECK_ERROR();
+	}
+
+	renderer->activeShaderId = renderer->shaderList[shaderlist_default];
 	GL_CHECK_ERROR();
 
 	/* Create buffers */

src/Renderer.c

@@ -285,12 +285,23 @@ createDefaultTexQuad(Renderer *renderer, RenderTex *renderTex)
 INTERNAL void renderGLBufferedData(Renderer *renderer, RenderGroup *group)
 {
 	ASSERT(group->mode < rendermode_invalid);
-	/* Load transformation matrix */
-	shader_use(renderer->shader);
-	GL_CHECK_ERROR();
+
+	u32 drawMethod = GL_TRIANGLE_STRIP;
+	if (group->flags & renderflag_wireframe)
+	{
+		drawMethod = GL_LINE_LOOP;
+		renderer->activeShaderId =
+		    renderer->shaderList[shaderlist_default_no_tex];
+	}
+	else
+	{
+		renderer->activeShaderId = renderer->shaderList[shaderlist_default];
+	}
+
+	shader_use(renderer->activeShaderId);
 
 	/* Set color modulation value */
-	shader_uniformSetVec4f(renderer->shader, "spriteColor",
+	shader_uniformSetVec4f(renderer->activeShaderId, "spriteColor",
 	                       group->color);
 	GL_CHECK_ERROR();
 
@@ -299,17 +310,10 @@ INTERNAL void renderGLBufferedData(Renderer *renderer, RenderGroup *group)
 	{
 		glActiveTexture(GL_TEXTURE0);
 		glBindTexture(GL_TEXTURE_2D, tex->id);
-		shader_uniformSet1i(renderer->shader, "tex", 0);
+		shader_uniformSet1i(renderer->activeShaderId, "tex", 0);
 	}
 
 	glBindVertexArray(renderer->vao[group->mode]);
-
-	u32 drawMethod = GL_TRIANGLE_STRIP;
-	if (group->flags & renderflag_wireframe)
-	{
-		drawMethod = GL_LINE_LOOP;
-	}
-
 	glDrawArrays(drawMethod, 0, renderer->numVertexesInVbo);
 	GL_CHECK_ERROR();
 	debug_countIncrement(debugcount_drawArrays);

src/Shader.c

@@ -1,25 +1,27 @@
 #include "Dengine/Shader.h"
 
-void shader_uniformSet1i(Shader *const shader, const GLchar *name,
+void shader_uniformSet1i(u32 shaderId, const GLchar *name,
                          const GLuint data)
 {
-	GLint uniformLoc = glGetUniformLocation(shader->id, name);
+	GLint uniformLoc = glGetUniformLocation(shaderId, name);
 	glUniform1i(uniformLoc, data);
 }
 
-void shader_uniformSetMat4fv(Shader *const shader, const GLchar *name,
+void shader_uniformSetMat4fv(u32 shaderId, const GLchar *name,
                              mat4 data)
 {
-	GLint uniformLoc = glGetUniformLocation(shader->id, name);
+	GLint uniformLoc = glGetUniformLocation(shaderId, name);
+	GL_CHECK_ERROR();
 	glUniformMatrix4fv(uniformLoc, 1, GL_FALSE, data.e[0]);
+	GL_CHECK_ERROR();
 }
 
-void shader_uniformSetVec4f(Shader *const shader, const GLchar *name,
+void shader_uniformSetVec4f(u32 shaderId, const GLchar *name,
                             v4 data)
 {
-	GLint uniformLoc = glGetUniformLocation(shader->id, name);
+	GLint uniformLoc = glGetUniformLocation(shaderId, name);
 	glUniform4f(uniformLoc, data.e[0], data.e[1], data.e[2], data.e[3]);
 }
 
 
-void shader_use(const Shader *const shader) { glUseProgram(shader->id); }
+void shader_use(u32 shaderId) { glUseProgram(shaderId); }

src/include/Dengine/AssetManager.h

@@ -18,7 +18,7 @@ typedef struct AssetManager
 	HashTable audio;
 
 	/* Primitive Array */
-	Shader shaders[2];
+	u32 shaders[shaderlist_count];
 	Font font;
 } AssetManager;
 
@@ -72,7 +72,7 @@ const i32 asset_loadXmlFile(AssetManager *const assetManager,
                             MemoryArena_ *const arena,
                             const PlatformFileRead *const fileRead);
 
-Shader *const asset_getShader(AssetManager *assetManager, const enum ShaderList type);
+u32 asset_getShader(AssetManager *assetManager, const enum ShaderList type);
 const i32 asset_loadShaderFiles(AssetManager *assetManager, MemoryArena_ *arena,
                                 const char *const vertexPath,
                                 const char *const fragmentPath,

src/include/Dengine/Assets.h

@@ -44,7 +44,8 @@ typedef struct XmlNode
 
 enum ShaderList
 {
-	shaderlist_sprite,
+	shaderlist_default,
+	shaderlist_default_no_tex,
 	shaderlist_count,
 };
 

src/include/Dengine/Renderer.h

@@ -3,6 +3,7 @@
 
 #include "Dengine/Common.h"
 #include "Dengine/Math.h"
+#include "Dengine/Assets.h"
 
 /* Forward Declaration */
 typedef struct AssetManager AssetManager;
@@ -57,7 +58,8 @@ typedef struct RenderGroup
 
 typedef struct Renderer
 {
-	Shader *shader;
+	u32 shaderList[shaderlist_count];
+	u32 activeShaderId;
 
 	u32 vao[rendermode_count];
 	u32 vbo[rendermode_count];

src/include/Dengine/Shader.h

@@ -4,18 +4,13 @@
 #include "Dengine/Math.h"
 #include "Dengine/OpenGL.h"
 
-typedef struct Shader
-{
-	GLuint id;
-} Shader;
-
-void shader_uniformSet1i(Shader *const shader, const GLchar *name,
+void shader_uniformSet1i(u32 shaderId, const GLchar *name,
                          const GLuint data);
-void shader_uniformSetMat4fv(Shader *const shader, const GLchar *name,
+void shader_uniformSetMat4fv(u32 shaderId, const GLchar *name,
                              mat4 data);
-void shader_uniformSetVec4f(Shader *const shader, const GLchar *name,
+void shader_uniformSetVec4f(u32 shaderId, const GLchar *name,
                             v4 data);
 
-void shader_use(const Shader *const shader);
+void shader_use(u32 shaderId);
 
 #endif