Add command buffer support for EXT_sRGB_write_control

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 4290 matching lines @@
     return false;
 
   if (!features().chromium_framebuffer_multisample)
     OnUseFramebuffer();
 
   UpdateFramebufferSRGB(framebuffer);
   return true;
 }
 
 void GLES2DecoderImpl::UpdateFramebufferSRGB(Framebuffer* framebuffer) {
+  // Manually set the value of FRAMEBUFFER_SRGB based on the state that was set
+  // by the client.
+  bool needs_enable_disable_framebuffer_srgb = false;
+  bool enable_framebuffer_srgb = true;
+  if (feature_info_->feature_flags().ext_srgb_write_control) {
+    needs_enable_disable_framebuffer_srgb = true;
+    enable_framebuffer_srgb &= state_.GetEnabled(GL_FRAMEBUFFER_SRGB);
+  }
   // On desktop, enable FRAMEBUFFER_SRGB only if the framebuffer contains sRGB
   // attachments. In theory, we can just leave FRAMEBUFFER_SRGB enabled,
   // however,
   // many drivers behave incorrectly when no attachments are sRGB. When at
   // least one attachment is sRGB, then they behave correctly.
   if (feature_info_->feature_flags().desktop_srgb_support) {
+    needs_enable_disable_framebuffer_srgb = true;
     // Assume that the default fbo does not have an sRGB image.
-    bool enable_framebuffer_srgb =
-        framebuffer && framebuffer->HasSRGBAttachments();
+    enable_framebuffer_srgb &= framebuffer && framebuffer->HasSRGBAttachments();
+  }
+  if (needs_enable_disable_framebuffer_srgb)
     state_.EnableDisableFramebufferSRGB(enable_framebuffer_srgb);
-  }
 }
 
 bool GLES2DecoderImpl::CheckBoundReadFramebufferValid(
     const char* func_name, GLenum gl_error) {
   GLenum target = features().chromium_framebuffer_multisample ?
       GL_READ_FRAMEBUFFER : GL_FRAMEBUFFER;
   Framebuffer* framebuffer = GetFramebufferInfoForTarget(target);
   bool valid = CheckFramebufferValid(
       framebuffer, target, gl_error, func_name);
   return valid;
@@ skipping 3094 matching lines @@
 }
 
 void GLES2DecoderImpl::DoDisable(GLenum cap) {
   if (SetCapabilityState(cap, false)) {
     if (cap == GL_PRIMITIVE_RESTART_FIXED_INDEX &&
         feature_info_->feature_flags().emulate_primitive_restart_fixed_index) {
       // Enable and Disable PRIMITIVE_RESTART only before and after
       // DrawElements* for old desktop GL.
       return;
     }
+    if (cap == GL_FRAMEBUFFER_SRGB) {
+      // Enable and Disable GL_FRAMEBUFFER_SRGB is done manually in
+      // CheckBoundDrawFramebufferValid.
+      return;
+    }
     glDisable(cap);
   }
 }
 
 void GLES2DecoderImpl::DoEnable(GLenum cap) {
   if (SetCapabilityState(cap, true)) {
     if (cap == GL_PRIMITIVE_RESTART_FIXED_INDEX &&
         feature_info_->feature_flags().emulate_primitive_restart_fixed_index) {
       // Enable and Disable PRIMITIVE_RESTART only before and after
       // DrawElements* for old desktop GL.
       return;
     }
+    if (cap == GL_FRAMEBUFFER_SRGB) {
+      // Enable and Disable GL_FRAMEBUFFER_SRGB is done manually in
+      // CheckBoundDrawFramebufferValid.
+      return;
+    }
     glEnable(cap);
   }
 }
 
 void GLES2DecoderImpl::DoDepthRangef(GLclampf znear, GLclampf zfar) {
   state_.z_near = std::min(1.0f, std::max(0.0f, znear));
   state_.z_far = std::min(1.0f, std::max(0.0f, zfar));
   glDepthRange(znear, zfar);
 }
 
@@ skipping 11457 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu