Add support for IMG's MSAA extension.

src/gpu/gl/GrGLCaps.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLCaps.h"
 #include "GrGLContext.h"
@@ skipping 233 matching lines @@
 void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
 
     fMSFBOType = kNone_MSFBOType;
     if (kDesktop_GrGLBinding != ctxInfo.binding()) {
        if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) {
            // chrome's extension is equivalent to the EXT msaa
            // and fbo_blit extensions.
            fMSFBOType = kDesktopEXT_MSFBOType;
        } else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) {
            fMSFBOType = kAppleES_MSFBOType;
+       } else if (ctxInfo.hasExtension("GL_IMG_multisampled_render_to_texture")) {
+           fMSFBOType = kImaginationES_MSFBOType;
        }
     } else {
         if ((ctxInfo.version() >= GR_GL_VER(3,0)) ||
             ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
             fMSFBOType = GrGLCaps::kDesktopARB_MSFBOType;
         } else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") &&
                    ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) {
             fMSFBOType = GrGLCaps::kDesktopEXT_MSFBOType;
         }
         // TODO: We could populate fMSAACoverageModes using GetInternalformativ
@@ skipping 149 matching lines @@
         GrPrintf("Stencil Format %d, stencil bits: %02d, total bits: %02d\n",
                  i,
                  fStencilFormats[i].fStencilBits,
                  fStencilFormats[i].fTotalBits);
     }
 
     GR_STATIC_ASSERT(0 == kNone_MSFBOType);
     GR_STATIC_ASSERT(1 == kDesktopARB_MSFBOType);
     GR_STATIC_ASSERT(2 == kDesktopEXT_MSFBOType);
     GR_STATIC_ASSERT(3 == kAppleES_MSFBOType);
+    GR_STATIC_ASSERT(4 == kImaginationES_MSFBOType);
     static const char* gMSFBOExtStr[] = {
         "None",
         "ARB",
         "EXT",
         "Apple",
+        "IMG",
     };
     GrPrintf("MSAA Type: %s\n", gMSFBOExtStr[fMSFBOType]);
     GrPrintf("Max FS Uniform Vectors: %d\n", fMaxFragmentUniformVectors);
     GrPrintf("Support RGBA8 Render Buffer: %s\n",
              (fRGBA8RenderbufferSupport ? "YES": "NO"));
     GrPrintf("BGRA is an internal format: %s\n",
              (fBGRAIsInternalFormat ? "YES": "NO"));
     GrPrintf("Support texture swizzle: %s\n",
              (fTextureSwizzleSupport ? "YES": "NO"));
     GrPrintf("Unpack Row length support: %s\n",
              (fUnpackRowLengthSupport ? "YES": "NO"));
     GrPrintf("Unpack Flip Y support: %s\n",
              (fUnpackFlipYSupport ? "YES": "NO"));
     GrPrintf("Pack Row length support: %s\n",
              (fPackRowLengthSupport ? "YES": "NO"));
     GrPrintf("Pack Flip Y support: %s\n",
              (fPackFlipYSupport ? "YES": "NO"));
     GrPrintf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
     GrPrintf("Fragment coord conventions support: %s\n", (fFragCoordsConventionSupport ? "YES": "NO"));
 }