Built basic UI Grid.

src/display/shader.c

@@ -76,12 +76,14 @@ void shaderInit(shader_t *shader,
   shader->uniView = glGetUniformLocation(shader->shaderProgram,SHADER_UNI_VIEW);
   shader->uniText = glGetUniformLocation(shader->shaderProgram,SHADER_UNI_TEXT);
   shader->uniModl = glGetUniformLocation(shader->shaderProgram,SHADER_UNI_MODL);
+  shader->uniColr = glGetUniformLocation(shader->shaderProgram,SHADER_UNI_COLR);
 
   // Bind the shader
   shaderUse(shader);
 
   // Reset position
   shaderUsePosition(shader, 0, 0, 0, 0, 0, 0);
+  shaderUseColor(shader, PIXEL_COLOR_WHITE);
 }
 
 void shaderDispose(shader_t *shader) {
@@ -144,4 +146,13 @@ void shaderUsePositionAndScale(shader_t *shader,
   matrixScale(&matrix, scaleX, scaleY, scaleZ);
 
   shaderUseMatrix(shader, shader->uniModl, &matrix);
+}
+
+void shaderUseColor(shader_t *shader, pixel_t color) {
+  glUniform4f(shader->uniColr,
+    (float)color.r / 255.0f,
+    (float)color.g / 255.0f,
+    (float)color.b / 255.0f,
+    (float)color.a / 255.0f 
+  );
 }

src/display/shader.h

@@ -91,4 +91,7 @@ void shaderUsePositionAndScale(shader_t *shader,
   float x, float y, float z,
   float pitch, float yaw, float roll,
   float scaleX, float scaleY, float scaleZ
-);
+);
+
+
+void shaderUseColor(shader_t *shader, pixel_t color);