gl_state: Remove blend state tracking

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -442,7 +442,9 @@ void RasterizerOpenGL::Clear() {
     }
 
     // TODO: Signal state tracker about these changes
+    // TODO(Rodrigo): Find out if these changes affect clearing
     glClipControl(GL_LOWER_LEFT, GL_ZERO_TO_ONE);
+    glDisablei(GL_BLEND, 0);
 
     UNIMPLEMENTED_IF(regs.clear_flags.viewport);
 
@@ -1049,37 +1051,34 @@ void RasterizerOpenGL::SyncBlendState() {
 
     glBlendColor(regs.blend_color.r, regs.blend_color.g, regs.blend_color.b, regs.blend_color.a);
 
-    state.independant_blend.enabled = regs.independent_blend_enable;
-    if (!state.independant_blend.enabled) {
-        auto& blend = state.blend[0];
+    if (!regs.independent_blend_enable) {
         const auto& src = regs.blend;
-        blend.enabled = src.enable[0] != 0;
-        if (blend.enabled) {
-            blend.rgb_equation = MaxwellToGL::BlendEquation(src.equation_rgb);
-            blend.src_rgb_func = MaxwellToGL::BlendFunc(src.factor_source_rgb);
-            blend.dst_rgb_func = MaxwellToGL::BlendFunc(src.factor_dest_rgb);
-            blend.a_equation = MaxwellToGL::BlendEquation(src.equation_a);
-            blend.src_a_func = MaxwellToGL::BlendFunc(src.factor_source_a);
-            blend.dst_a_func = MaxwellToGL::BlendFunc(src.factor_dest_a);
-        }
-        for (std::size_t i = 1; i < Tegra::Engines::Maxwell3D::Regs::NumRenderTargets; i++) {
-            state.blend[i].enabled = false;
+        oglEnable(GL_BLEND, src.enable[0]);
+        if (!src.enable[0]) {
+            return;
         }
+        glBlendFuncSeparate(MaxwellToGL::BlendFunc(src.factor_source_rgb),
+                            MaxwellToGL::BlendFunc(src.factor_dest_rgb),
+                            MaxwellToGL::BlendFunc(src.factor_source_a),
+                            MaxwellToGL::BlendFunc(src.factor_dest_a));
+        glBlendEquationSeparate(MaxwellToGL::BlendEquation(src.equation_rgb),
+                                MaxwellToGL::BlendEquation(src.equation_a));
         return;
     }
 
-    for (std::size_t i = 0; i < Tegra::Engines::Maxwell3D::Regs::NumRenderTargets; i++) {
-        auto& blend = state.blend[i];
-        const auto& src = regs.independent_blend[i];
-        blend.enabled = regs.blend.enable[i] != 0;
-        if (!blend.enabled)
+    for (std::size_t i = 0; i < Maxwell::NumRenderTargets; ++i) {
+        oglEnablei(GL_BLEND, regs.blend.enable[i], static_cast<GLuint>(i));
+        if (!regs.blend.enable[i]) {
             continue;
-        blend.rgb_equation = MaxwellToGL::BlendEquation(src.equation_rgb);
-        blend.src_rgb_func = MaxwellToGL::BlendFunc(src.factor_source_rgb);
-        blend.dst_rgb_func = MaxwellToGL::BlendFunc(src.factor_dest_rgb);
-        blend.a_equation = MaxwellToGL::BlendEquation(src.equation_a);
-        blend.src_a_func = MaxwellToGL::BlendFunc(src.factor_source_a);
-        blend.dst_a_func = MaxwellToGL::BlendFunc(src.factor_dest_a);
+        }
+        const auto& src = regs.independent_blend[i];
+        glBlendFuncSeparatei(static_cast<GLuint>(i), MaxwellToGL::BlendFunc(src.factor_source_rgb),
+                             MaxwellToGL::BlendFunc(src.factor_dest_rgb),
+                             MaxwellToGL::BlendFunc(src.factor_source_a),
+                             MaxwellToGL::BlendFunc(src.factor_dest_a));
+        glBlendEquationSeparatei(static_cast<GLuint>(i),
+                                 MaxwellToGL::BlendEquation(src.equation_rgb),
+                                 MaxwellToGL::BlendEquation(src.equation_a));
     }
 }
 

src/video_core/renderer_opengl/gl_state.cpp

@@ -106,66 +106,6 @@ void OpenGLState::ApplyProgramPipeline() {
     }
 }
 
-void OpenGLState::ApplyGlobalBlending() {
-    const Blend& updated = blend[0];
-    Blend& current = cur_state.blend[0];
-
-    Enable(GL_BLEND, current.enabled, updated.enabled);
-
-    if (current.src_rgb_func != updated.src_rgb_func ||
-        current.dst_rgb_func != updated.dst_rgb_func || current.src_a_func != updated.src_a_func ||
-        current.dst_a_func != updated.dst_a_func) {
-        current.src_rgb_func = updated.src_rgb_func;
-        current.dst_rgb_func = updated.dst_rgb_func;
-        current.src_a_func = updated.src_a_func;
-        current.dst_a_func = updated.dst_a_func;
-        glBlendFuncSeparate(updated.src_rgb_func, updated.dst_rgb_func, updated.src_a_func,
-                            updated.dst_a_func);
-    }
-
-    if (current.rgb_equation != updated.rgb_equation || current.a_equation != updated.a_equation) {
-        current.rgb_equation = updated.rgb_equation;
-        current.a_equation = updated.a_equation;
-        glBlendEquationSeparate(updated.rgb_equation, updated.a_equation);
-    }
-}
-
-void OpenGLState::ApplyTargetBlending(std::size_t target, bool force) {
-    const Blend& updated = blend[target];
-    Blend& current = cur_state.blend[target];
-
-    if (current.enabled != updated.enabled || force) {
-        current.enabled = updated.enabled;
-        Enable(GL_BLEND, static_cast<GLuint>(target), updated.enabled);
-    }
-
-    if (UpdateTie(std::tie(current.src_rgb_func, current.dst_rgb_func, current.src_a_func,
-                           current.dst_a_func),
-                  std::tie(updated.src_rgb_func, updated.dst_rgb_func, updated.src_a_func,
-                           updated.dst_a_func))) {
-        glBlendFuncSeparatei(static_cast<GLuint>(target), updated.src_rgb_func,
-                             updated.dst_rgb_func, updated.src_a_func, updated.dst_a_func);
-    }
-
-    if (UpdateTie(std::tie(current.rgb_equation, current.a_equation),
-                  std::tie(updated.rgb_equation, updated.a_equation))) {
-        glBlendEquationSeparatei(static_cast<GLuint>(target), updated.rgb_equation,
-                                 updated.a_equation);
-    }
-}
-
-void OpenGLState::ApplyBlending() {
-    if (independant_blend.enabled) {
-        const bool force = independant_blend.enabled != cur_state.independant_blend.enabled;
-        for (std::size_t target = 0; target < Maxwell::NumRenderTargets; ++target) {
-            ApplyTargetBlending(target, force);
-        }
-    } else {
-        ApplyGlobalBlending();
-    }
-    cur_state.independant_blend.enabled = independant_blend.enabled;
-}
-
 void OpenGLState::ApplyRenderBuffer() {
     if (cur_state.renderbuffer != renderbuffer) {
         cur_state.renderbuffer = renderbuffer;
@@ -206,7 +146,6 @@ void OpenGLState::Apply() {
     ApplyFramebufferState();
     ApplyShaderProgram();
     ApplyProgramPipeline();
-    ApplyBlending();
     ApplyTextures();
     ApplySamplers();
     ApplyImages();

src/video_core/renderer_opengl/gl_state.h

@@ -13,21 +13,6 @@ namespace OpenGL {
 
 class OpenGLState {
 public:
-    struct Blend {
-        bool enabled = false;              // GL_BLEND
-        GLenum rgb_equation = GL_FUNC_ADD; // GL_BLEND_EQUATION_RGB
-        GLenum a_equation = GL_FUNC_ADD;   // GL_BLEND_EQUATION_ALPHA
-        GLenum src_rgb_func = GL_ONE;      // GL_BLEND_SRC_RGB
-        GLenum dst_rgb_func = GL_ZERO;     // GL_BLEND_DST_RGB
-        GLenum src_a_func = GL_ONE;        // GL_BLEND_SRC_ALPHA
-        GLenum dst_a_func = GL_ZERO;       // GL_BLEND_DST_ALPHA
-    };
-    std::array<Blend, Tegra::Engines::Maxwell3D::Regs::NumRenderTargets> blend;
-
-    struct {
-        bool enabled = false;
-    } independant_blend;
-
     static constexpr std::size_t NumSamplers = 32 * 5;
     static constexpr std::size_t NumImages = 8 * 5;
     std::array<GLuint, NumSamplers> textures = {};
@@ -56,9 +41,6 @@ public:
     void ApplyFramebufferState();
     void ApplyShaderProgram();
     void ApplyProgramPipeline();
-    void ApplyTargetBlending(std::size_t target, bool force);
-    void ApplyGlobalBlending();
-    void ApplyBlending();
     void ApplyTextures();
     void ApplySamplers();
     void ApplyImages();

src/video_core/renderer_opengl/gl_texture_cache.cpp

@@ -537,8 +537,11 @@ void TextureCacheOpenGL::ImageBlit(View& src_view, View& dst_view,
         glDisable(GL_FRAMEBUFFER_SRGB);
     }
     // TODO(Rodrigo): Find out if rasterizer discard affects blits
+    // TODO(Rodrigo): Find out if blending affects blits
+    // TODO(Rodrigo): Find out if clip control affects blits
     glDisable(GL_RASTERIZER_DISCARD);
     glDisablei(GL_SCISSOR_TEST, 0);
+    glDisablei(GL_BLEND, 0);
     glClipControl(GL_LOWER_LEFT, GL_ZERO_TO_ONE);
 
     u32 buffers{};

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -582,6 +582,7 @@ void RendererOpenGL::DrawScreen(const Layout::FramebufferLayout& layout) {
     glDisable(GL_STENCIL_TEST);
     glDisable(GL_POLYGON_OFFSET_FILL);
     glDisable(GL_RASTERIZER_DISCARD);
+    glDisablei(GL_BLEND, 0);
     glDisablei(GL_SCISSOR_TEST, 0);
     glCullFace(GL_BACK);
     glFrontFace(GL_CW);