3 files changed, 91 insertions, 2 deletions
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 75b4031a7..7b6240e65 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -446,7 +446,32 @@ void RasterizerOpenGL::BindTextures() {
     }
 }
 
-void RasterizerOpenGL::NotifyMaxwellRegisterChanged(u32 id) {}
+void RasterizerOpenGL::NotifyMaxwellRegisterChanged(u32 method) {
+    const auto& regs = Core::System().GetInstance().GPU().Maxwell3D().regs;
+    switch (method) {
+    case MAXWELL3D_REG_INDEX(blend.separate_alpha):
+        ASSERT_MSG(false, "unimplemented");
+        break;
+    case MAXWELL3D_REG_INDEX(blend.equation_rgb):
+        state.blend.rgb_equation = MaxwellToGL::BlendEquation(regs.blend.equation_rgb);
+        break;
+    case MAXWELL3D_REG_INDEX(blend.factor_source_rgb):
+        state.blend.src_rgb_func = MaxwellToGL::BlendFunc(regs.blend.factor_source_rgb);
+        break;
+    case MAXWELL3D_REG_INDEX(blend.factor_dest_rgb):
+        state.blend.dst_rgb_func = MaxwellToGL::BlendFunc(regs.blend.factor_dest_rgb);
+        break;
+    case MAXWELL3D_REG_INDEX(blend.equation_a):
+        state.blend.a_equation = MaxwellToGL::BlendEquation(regs.blend.equation_a);
+        break;
+    case MAXWELL3D_REG_INDEX(blend.factor_source_a):
+        state.blend.src_a_func = MaxwellToGL::BlendFunc(regs.blend.factor_source_a);
+        break;
+    case MAXWELL3D_REG_INDEX(blend.factor_dest_a):
+        state.blend.dst_a_func = MaxwellToGL::BlendFunc(regs.blend.factor_dest_a);
+        break;
+    }
+}
 
 void RasterizerOpenGL::FlushAll() {
     MICROPROFILE_SCOPE(OpenGL_CacheManagement);
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.h b/src/video_core/renderer_opengl/gl_rasterizer.h
index fb5d99ba2..9ece415f7 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.h
+++ b/src/video_core/renderer_opengl/gl_rasterizer.h
@@ -32,7 +32,7 @@ public:
     ~RasterizerOpenGL() override;
 
     void DrawArrays() override;
-    void NotifyMaxwellRegisterChanged(u32 id) override;
+    void NotifyMaxwellRegisterChanged(u32 method) override;
     void FlushAll() override;
     void FlushRegion(VAddr addr, u64 size) override;
     void InvalidateRegion(VAddr addr, u64 size) override;
diff --git a/src/video_core/renderer_opengl/maxwell_to_gl.h b/src/video_core/renderer_opengl/maxwell_to_gl.h
index aa5026cce..a49265b38 100644
--- a/src/video_core/renderer_opengl/maxwell_to_gl.h
+++ b/src/video_core/renderer_opengl/maxwell_to_gl.h
@@ -102,4 +102,68 @@ inline GLenum WrapMode(Tegra::Texture::WrapMode wrap_mode) {
     return {};
 }
 
+inline GLenum BlendEquation(Maxwell::Blend::Equation equation) {
+    switch (equation) {
+    case Maxwell::Blend::Equation::Add:
+        return GL_FUNC_ADD;
+    case Maxwell::Blend::Equation::Subtract:
+        return GL_FUNC_SUBTRACT;
+    case Maxwell::Blend::Equation::ReverseSubtract:
+        return GL_FUNC_REVERSE_SUBTRACT;
+    case Maxwell::Blend::Equation::Min:
+        return GL_MIN;
+    case Maxwell::Blend::Equation::Max:
+        return GL_MAX;
+    }
+    NGLOG_CRITICAL(Render_OpenGL, "Unimplemented blend equation={}", static_cast<u32>(equation));
+    UNREACHABLE();
+    return {};
+}
+
+inline GLenum BlendFunc(Maxwell::Blend::Factor factor) {
+    switch (factor) {
+    case Maxwell::Blend::Factor::Zero:
+        return GL_ZERO;
+    case Maxwell::Blend::Factor::One:
+        return GL_ONE;
+    case Maxwell::Blend::Factor::SourceColor:
+        return GL_SRC_COLOR;
+    case Maxwell::Blend::Factor::OneMinusSourceColor:
+        return GL_ONE_MINUS_SRC_COLOR;
+    case Maxwell::Blend::Factor::SourceAlpha:
+        return GL_SRC_ALPHA;
+    case Maxwell::Blend::Factor::OneMinusSourceAlpha:
+        return GL_ONE_MINUS_SRC_ALPHA;
+    case Maxwell::Blend::Factor::DestAlpha:
+        return GL_DST_ALPHA;
+    case Maxwell::Blend::Factor::OneMinusDestAlpha:
+        return GL_ONE_MINUS_DST_ALPHA;
+    case Maxwell::Blend::Factor::DestColor:
+        return GL_DST_COLOR;
+    case Maxwell::Blend::Factor::OneMinusDestColor:
+        return GL_ONE_MINUS_DST_COLOR;
+    case Maxwell::Blend::Factor::SourceAlphaSaturate:
+        return GL_SRC_ALPHA_SATURATE;
+    case Maxwell::Blend::Factor::Source1Color:
+        return GL_SRC1_COLOR;
+    case Maxwell::Blend::Factor::OneMinusSource1Color:
+        return GL_ONE_MINUS_SRC1_COLOR;
+    case Maxwell::Blend::Factor::Source1Alpha:
+        return GL_SRC1_ALPHA;
+    case Maxwell::Blend::Factor::OneMinusSource1Alpha:
+        return GL_ONE_MINUS_SRC1_ALPHA;
+    case Maxwell::Blend::Factor::ConstantColor:
+        return GL_CONSTANT_COLOR;
+    case Maxwell::Blend::Factor::OneMinusConstantColor:
+        return GL_ONE_MINUS_CONSTANT_COLOR;
+    case Maxwell::Blend::Factor::ConstantAlpha:
+        return GL_CONSTANT_ALPHA;
+    case Maxwell::Blend::Factor::OneMinusConstantAlpha:
+        return GL_ONE_MINUS_CONSTANT_ALPHA;
+    }
+    NGLOG_CRITICAL(Render_OpenGL, "Unimplemented blend factor={}", static_cast<u32>(factor));
+    UNREACHABLE();
+    return {};
+}
+
 } // namespace MaxwellToGL