Shaders adapted for Legacy GL

src/duskgl/display/shader/shadergl.h

@@ -16,6 +16,12 @@ typedef struct {
     GLuint vertexShaderId;
     GLuint fragmentShaderId;
   #endif
+
+  #if DUSK_OPENGL_LEGACY
+    mat4 view;
+    mat4 proj;
+    mat4 model;
+  #endif
 } shadergl_t;
 
 typedef struct {
@@ -27,6 +33,19 @@ typedef struct {
   #endif
 } shaderdefinitiongl_t;
 
+#if DUSK_OPENGL_LEGACY
+  typedef struct {
+    shadergl_t *boundShader;
+    uint_fast8_t dirty;
+  } shaderlegacygl_t;
+
+  extern shaderlegacygl_t SHADER_LEGACY;
+  
+  #define SHADER_LEGACY_DIRTY_PROJ (1 << 0)
+  #define SHADER_LEGACY_DIRTY_VIEW (1 << 1)
+  #define SHADER_LEGACY_DIRTY_MODEL (1 << 2)
+#endif
+
 /**
  * Initializes a shader.
  * 
@@ -69,7 +88,7 @@ errorret_t shaderParamGetLocationGL(
 errorret_t shaderSetMatrixGL(
   shadergl_t *shader,
   const char_t *name,
-  const mat4 matrix
+  mat4 matrix
 );
 
 /**
@@ -77,4 +96,14 @@ errorret_t shaderSetMatrixGL(
  * 
  * @param shader The shader to dispose.
  */
-errorret_t shaderDisposeGL(shadergl_t *shader);
+errorret_t shaderDisposeGL(shadergl_t *shader);
+
+#ifdef DUSK_OPENGL_LEGACY
+  /**
+   * During mesh rendering, this is requesting the legacy system to push all
+   * shaders necessary to render the currently bound shader's matrices.
+   * 
+   * @return Any error state.
+   */
+  errorret_t shaderLegacyMatrixUpdate();
+#endif