Merge pull request #1592 from bunnei/prim-restart

gl_rasterizer: Implement primitive restart.

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -570,6 +570,7 @@ void RasterizerOpenGL::DrawArrays() {
     SyncBlendState();
     SyncLogicOpState();
     SyncCullMode();
+    SyncPrimitiveRestart();
     SyncDepthRange();
     SyncScissorTest();
     // Alpha Testing is synced on shaders.
@@ -924,6 +925,13 @@ void RasterizerOpenGL::SyncCullMode() {
     }
 }
 
+void RasterizerOpenGL::SyncPrimitiveRestart() {
+    const auto& regs = Core::System::GetInstance().GPU().Maxwell3D().regs;
+
+    state.primitive_restart.enabled = regs.primitive_restart.enabled;
+    state.primitive_restart.index = regs.primitive_restart.index;
+}
+
 void RasterizerOpenGL::SyncDepthRange() {
     const auto& regs = Core::System::GetInstance().GPU().Maxwell3D().regs;
 

src/video_core/renderer_opengl/gl_rasterizer.h

@@ -144,6 +144,9 @@ private:
     /// Syncs the cull mode to match the guest state
     void SyncCullMode();
 
+    /// Syncs the primitve restart to match the guest state
+    void SyncPrimitiveRestart();
+
     /// Syncs the depth range to match the guest state
     void SyncDepthRange();
 

src/video_core/renderer_opengl/gl_state.cpp

@@ -24,6 +24,9 @@ OpenGLState::OpenGLState() {
     depth.depth_range_near = 0.0f;
     depth.depth_range_far = 1.0f;
 
+    primitive_restart.enabled = false;
+    primitive_restart.index = 0;
+
     color_mask.red_enabled = GL_TRUE;
     color_mask.green_enabled = GL_TRUE;
     color_mask.blue_enabled = GL_TRUE;
@@ -127,6 +130,18 @@ void OpenGLState::Apply() const {
         glDepthRange(depth.depth_range_near, depth.depth_range_far);
     }
 
+    // Primitive restart
+    if (primitive_restart.enabled != cur_state.primitive_restart.enabled) {
+        if (primitive_restart.enabled) {
+            glEnable(GL_PRIMITIVE_RESTART);
+        } else {
+            glDisable(GL_PRIMITIVE_RESTART);
+        }
+    }
+    if (primitive_restart.index != cur_state.primitive_restart.index) {
+        glPrimitiveRestartIndex(primitive_restart.index);
+    }
+
     // Color mask
     if (color_mask.red_enabled != cur_state.color_mask.red_enabled ||
         color_mask.green_enabled != cur_state.color_mask.green_enabled ||

src/video_core/renderer_opengl/gl_state.h

@@ -49,6 +49,11 @@ public:
         GLfloat depth_range_far;  // GL_DEPTH_RANGE
     } depth;
 
+    struct {
+        bool enabled;
+        GLuint index;
+    } primitive_restart; // GL_PRIMITIVE_RESTART
+
     struct {
         GLboolean red_enabled;
         GLboolean green_enabled;