Shader material ECS example

src/duskgl/display/shader/shadergl.c

@@ -20,6 +20,8 @@ errorret_t shaderInitGL(shadergl_t *shader, const shaderdefinitiongl_t *def) {
   assertNotNull(def, "Shader definition cannot be null");
   memoryZero(shader, sizeof(shadergl_t));
 
+  shader->definition = def;
+
   #ifdef DUSK_OPENGL_LEGACY
     glm_mat4_identity(shader->view);
     glm_mat4_identity(shader->proj);
@@ -31,8 +33,6 @@ errorret_t shaderInitGL(shadergl_t *shader, const shaderdefinitiongl_t *def) {
     assertNotNull(def->vert, "Vertex shader source cannot be null");
     assertNotNull(def->frag, "Fragment shader source cannot be null");
 
-    shader->setTexture = def->setTexture;
-
     // Create vertex shader
     shader->vertexShaderId = glCreateShader(GL_VERTEX_SHADER);
     errorret_t err = errorGLCheck();
@@ -237,10 +237,36 @@ errorret_t shaderSetTextureGL(
     errorChain(errorGLCheck());
 
   #else
-    if(shader->setTexture == NULL) {
-      assertUnreachable("Shader does not support setting textures.");
-    }
-    errorChain(shader->setTexture(shader, name, texture));
+    assertNotNull(shader->definition, "Shader definition cannot be null");
+    assertNotNull(shader->definition->setTexture, "Shader cannot do textures.");
+    errorChain(shader->definition->setTexture(shader, name, texture));
+  #endif
+
+  errorOk();
+}
+
+errorret_t shaderSetColorGL(
+  shadergl_t *shader,
+  const char_t *name,
+  color_t color
+) {
+  assertNotNull(shader, "Shader cannot be null");
+  assertStrLenMin(name, 1, "Uniform name cannot be empty");
+
+  #ifdef DUSK_OPENGL_LEGACY
+    glColor4ub(color.r, color.g, color.b, color.a);
+    errorChain(errorGLCheck());
+  #else
+    GLint location;
+    errorChain(shaderParamGetLocationGL(shader, name, &location));
+    glUniform4f(
+      location,
+      color.r / 255.0f,
+      color.g / 255.0f,
+      color.b / 255.0f,
+      color.a / 255.0f
+    );
+    errorChain(errorGLCheck());
   #endif
 
   errorOk();