Added --deepColor option to SampleApp, triggers creation of a ten-bit/channel buffer on Windows.

src/views/win/SkOSWindow_win.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkTypes.h"
 
 #if defined(SK_BUILD_FOR_WIN)
 
@@ skipping 321 matching lines @@
     }
     if (delay)
     {
         gTimer = SetTimer(NULL, 0, delay, sk_timer_proc);
         //SkDebugf("SetTimer of %d returned %d\n", delay, gTimer);
     }
 }
 
 #if SK_SUPPORT_GPU
 
-bool SkOSWindow::attachGL(int msaaSampleCount, AttachmentInfo* info) {
+bool SkOSWindow::attachGL(int msaaSampleCount, bool deepColor, AttachmentInfo* info) {
     HDC dc = GetDC((HWND)fHWND);
     if (NULL == fHGLRC) {
-        fHGLRC = SkCreateWGLContext(dc, msaaSampleCount,
+        fHGLRC = SkCreateWGLContext(dc, msaaSampleCount, deepColor,
                 kGLPreferCompatibilityProfile_SkWGLContextRequest);
         if (NULL == fHGLRC) {
             return false;
         }
         glClearStencil(0);
         glClearColor(0, 0, 0, 0);
         glStencilMask(0xffffffff);
         glClear(GL_STENCIL_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
     }
     if (wglMakeCurrent(dc, (HGLRC)fHGLRC)) {
-        // use DescribePixelFormat to get the stencil bit depth.
+        // use DescribePixelFormat to get the stencil and color bit depth.
         int pixelFormat = GetPixelFormat(dc);
         PIXELFORMATDESCRIPTOR pfd;
         DescribePixelFormat(dc, pixelFormat, sizeof(pfd), &pfd);
         info->fStencilBits = pfd.cStencilBits;
+        // pfd.cColorBits includes alpha, so it will be 32 in 8/8/8/8 and 10/10/10/2
+        info->fColorBits = pfd.cRedBits + pfd.cGreenBits + pfd.cBlueBits;
 
         // Get sample count if the MSAA WGL extension is present
         SkWGLExtensions extensions;
         if (extensions.hasExtension(dc, "WGL_ARB_multisample")) {
             static const int kSampleCountAttr = SK_WGL_SAMPLES;
             extensions.getPixelFormatAttribiv(dc,
                                               pixelFormat,
                                               0,
                                               1,
                                               &kSampleCountAttr,
@@ skipping 273 matching lines @@
 }
 
 void SkOSWindow::presentCommandBuffer() {
     fCommandBuffer->presentCommandBuffer();
 }
 #endif // SK_COMMAND_BUFFER
 
 #endif // SK_SUPPORT_GPU
 
 // return true on success
-bool SkOSWindow::attach(SkBackEndTypes attachType, int msaaSampleCount, AttachmentInfo* info) {
+bool SkOSWindow::attach(SkBackEndTypes attachType, int msaaSampleCount, bool deepColor,
+                        AttachmentInfo* info) {
 
     // attach doubles as "windowResize" so we need to allo
     // already bound states to pass through again
     // TODO: split out the resize functionality
 //    SkASSERT(kNone_BackEndType == fAttached);
     bool result = true;
 
     switch (attachType) {
     case kNone_BackEndType:
         // nothing to do
         break;
 #if SK_SUPPORT_GPU
     case kNativeGL_BackEndType:
-        result = attachGL(msaaSampleCount, info);
+        result = attachGL(msaaSampleCount, deepColor, info);
         break;
 #if SK_ANGLE
     case kANGLE_BackEndType:
         result = attachANGLE(msaaSampleCount, info);
         break;
 #endif // SK_ANGLE
 #if SK_COMMAND_BUFFER
     case kCommandBuffer_BackEndType:
         result = attachCommandBuffer(msaaSampleCount, info);
         break;
@@ skipping 147 matching lines @@
 }
 
 void SkOSWindow::closeWindow() {
     DestroyWindow((HWND)fHWND);
     if (fFullscreen) {
         DestroyWindow((HWND)fSavedWindowState.fHWND);
     }
     gHwndToOSWindowMap.remove(fHWND);
 }
 #endif