Implemented glColorMask

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -652,6 +652,10 @@ void RasterizerOpenGL::SyncDepthTest() {
     const auto& regs = Pica::g_state.regs;
     state.depth.test_enabled = (regs.output_merger.depth_test_enable == 1);
     state.depth.test_func = PicaToGL::CompareFunc(regs.output_merger.depth_test_func);
+    state.color_mask.red_enabled = regs.output_merger.red_enable;
+    state.color_mask.green_enabled = regs.output_merger.green_enable;
+    state.color_mask.blue_enabled = regs.output_merger.blue_enable;
+    state.color_mask.alpha_enabled = regs.output_merger.alpha_enable;
     state.depth.write_mask = regs.output_merger.depth_write_enable ? GL_TRUE : GL_FALSE;
 }
 

src/video_core/renderer_opengl/gl_state.cpp

@@ -16,6 +16,11 @@ OpenGLState::OpenGLState() {
     depth.test_func = GL_LESS;
     depth.write_mask = GL_TRUE;
 
+    color_mask.red_enabled = GL_TRUE;
+    color_mask.green_enabled = GL_TRUE;
+    color_mask.blue_enabled = GL_TRUE;
+    color_mask.alpha_enabled = GL_TRUE;
+
     stencil.test_enabled = false;
     stencil.test_func = GL_ALWAYS;
     stencil.test_ref = 0;
@@ -77,6 +82,14 @@ void OpenGLState::Apply() {
         glDepthMask(depth.write_mask);
     }
 
+    // Color mask
+    if (color_mask.red_enabled != cur_state.color_mask.red_enabled ||
+        color_mask.green_enabled != cur_state.color_mask.green_enabled ||
+        color_mask.blue_enabled != cur_state.color_mask.blue_enabled ||
+        color_mask.alpha_enabled != cur_state.color_mask.alpha_enabled) {
+        glColorMask(color_mask.red_enabled, color_mask.green_enabled, color_mask.blue_enabled, color_mask.alpha_enabled);
+    }
+
     // Stencil test
     if (stencil.test_enabled != cur_state.stencil.test_enabled) {
         if (stencil.test_enabled) {

src/video_core/renderer_opengl/gl_state.h

@@ -19,6 +19,13 @@ public:
         GLboolean write_mask; // GL_DEPTH_WRITEMASK
     } depth;
 
+    struct {
+        GLboolean red_enabled;
+        GLboolean green_enabled;
+        GLboolean blue_enabled;
+        GLboolean alpha_enabled;
+    } color_mask; // GL_COLOR_WRITEMASK
+
     struct {
         bool test_enabled; // GL_STENCIL_TEST
         GLenum test_func; // GL_STENCIL_FUNC