From 466e608c19c5bd70392bd4f4049fc7ba9963a14c Mon Sep 17 00:00:00 2001
From: Yuri Kunde Schlesner <yuriks@yuriks.net>
Date: Sun, 30 Aug 2015 09:15:35 -0300
Subject: [PATCH] OpenGL: Remove ugly and endian-unsafe color pointer casts

---
 src/video_core/pica.h                                  |  4 ++++
 src/video_core/renderer_opengl/gl_rasterizer.cpp       |  6 +++---
 src/video_core/renderer_opengl/gl_rasterizer_cache.cpp |  2 +-
 src/video_core/renderer_opengl/pica_to_gl.h            | 10 +++++-----
 4 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/src/video_core/pica.h b/src/video_core/pica.h
index 855cb442e1..c1dca5087c 100644
--- a/src/video_core/pica.h
+++ b/src/video_core/pica.h
@@ -135,6 +135,7 @@ struct Regs {
         };
 
         union {
+            u32 raw;
             BitField< 0, 8, u32> r;
             BitField< 8, 8, u32> g;
             BitField<16, 8, u32> b;
@@ -339,6 +340,7 @@ struct Regs {
         };
 
         union {
+            u32 const_color;
             BitField< 0, 8, u32> const_r;
             BitField< 8, 8, u32> const_g;
             BitField<16, 8, u32> const_b;
@@ -389,6 +391,7 @@ struct Regs {
     TevStageConfig tev_stage5;
 
     union {
+        u32 raw;
         BitField< 0, 8, u32> r;
         BitField< 8, 8, u32> g;
         BitField<16, 8, u32> b;
@@ -473,6 +476,7 @@ struct Regs {
         };
 
         union {
+            u32 raw;
             BitField< 0, 8, u32> r;
             BitField< 8, 8, u32> g;
             BitField<16, 8, u32> b;
diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 80e7737283..b556ea65b6 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -658,7 +658,7 @@ void RasterizerOpenGL::SyncBlendFuncs() {
 }
 
 void RasterizerOpenGL::SyncBlendColor() {
-    auto blend_color = PicaToGL::ColorRGBA8((u8*)&Pica::g_state.regs.output_merger.blend_const.r);
+    auto blend_color = PicaToGL::ColorRGBA8(Pica::g_state.regs.output_merger.blend_const.raw);
     state.blend.color.red = blend_color[0];
     state.blend.color.green = blend_color[1];
     state.blend.color.blue = blend_color[2];
@@ -728,7 +728,7 @@ void RasterizerOpenGL::SyncTevOps(unsigned stage_index, const Pica::Regs::TevSta
 }
 
 void RasterizerOpenGL::SyncTevColor(unsigned stage_index, const Pica::Regs::TevStageConfig& config) {
-    auto const_color = PicaToGL::ColorRGBA8((u8*)&config.const_r);
+    auto const_color = PicaToGL::ColorRGBA8(config.const_color);
     glUniform4fv(uniform_tev_cfgs[stage_index].const_color, 1, const_color.data());
 }
 
@@ -737,7 +737,7 @@ void RasterizerOpenGL::SyncTevMultipliers(unsigned stage_index, const Pica::Regs
 }
 
 void RasterizerOpenGL::SyncCombinerColor() {
-    auto combiner_color = PicaToGL::ColorRGBA8((u8*)&Pica::g_state.regs.tev_combiner_buffer_color.r);
+    auto combiner_color = PicaToGL::ColorRGBA8(Pica::g_state.regs.tev_combiner_buffer_color.raw);
     glUniform4fv(uniform_tev_combiner_buffer_color, 1, combiner_color.data());
 }
 
diff --git a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
index 1e38c2e6d3..5d9a80cd43 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer_cache.cpp
@@ -46,7 +46,7 @@ void RasterizerCacheOpenGL::LoadAndBindTexture(OpenGLState &state, unsigned text
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrap_t);
 
         if (wrap_s == GL_CLAMP_TO_BORDER || wrap_t == GL_CLAMP_TO_BORDER) {
-            auto border_color = PicaToGL::ColorRGBA8((u8*)&config.config.border_color.r);
+            auto border_color = PicaToGL::ColorRGBA8(config.config.border_color.raw);
             glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_BORDER_COLOR, border_color.data());
         }
 
diff --git a/src/video_core/renderer_opengl/pica_to_gl.h b/src/video_core/renderer_opengl/pica_to_gl.h
index 6344f467fa..04c1d1a347 100644
--- a/src/video_core/renderer_opengl/pica_to_gl.h
+++ b/src/video_core/renderer_opengl/pica_to_gl.h
@@ -175,11 +175,11 @@ inline GLenum StencilOp(Pica::Regs::StencilAction action) {
     return stencil_op_table[(unsigned)action];
 }
 
-inline std::array<GLfloat, 4> ColorRGBA8(const u8* bytes) {
-    return { { bytes[0] / 255.0f,
-               bytes[1] / 255.0f,
-               bytes[2] / 255.0f,
-               bytes[3] / 255.0f
+inline std::array<GLfloat, 4> ColorRGBA8(const u32 color) {
+    return { { (color >>  0 & 0xFF) / 255.0f,
+               (color >>  8 & 0xFF) / 255.0f,
+               (color >> 16 & 0xFF) / 255.0f,
+               (color >> 24 & 0xFF) / 255.0f
            } };
 }