Add support for GL_EXT_raster_multisample

include/gpu/GrCaps.h

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef GrCaps_DEFINED
 #define GrCaps_DEFINED
 
@@ skipping 193 matching lines @@
     int maxRenderTargetSize() const { return fMaxRenderTargetSize; }
     int maxTextureSize() const { return fMaxTextureSize; }
     /** This is the maximum tile size to use by GPU devices for rendering sw-backed images/bitmaps.
         It is usually the max texture size, unless we're overriding it for testing. */
     int maxTileSize() const { SkASSERT(fMaxTileSize <= fMaxTextureSize); return fMaxTileSize; }
 
     // Will be 0 if MSAA is not supported
     int maxColorSampleCount() const { return fMaxColorSampleCount; }
     // Will be 0 if MSAA is not supported
     int maxStencilSampleCount() const { return fMaxStencilSampleCount; }
+    // Will be 0 if raster multisample is not supported. Raster multisample is a special HW mode
+    // where the rasterizer runs with more samples than are in the target framebuffer.
+    int maxRasterSamples() const { return fMaxRasterSamples; }
     // We require the sample count to be less than maxColorSampleCount and maxStencilSampleCount.
     // If we are using mixed samples, we only care about stencil.
     int maxSampleCount() const {
         if (this->usesMixedSamples()) {
             return this->maxStencilSampleCount();
         } else {
             return SkTMin(this->maxColorSampleCount(), this->maxStencilSampleCount());
         }
     }
 
@@ skipping 60 matching lines @@
     GR_STATIC_ASSERT(kLast_GrBlendEquation < 32);
 
     uint32_t fMapBufferFlags;
     int fGeometryBufferMapThreshold;
 
     int fMaxRenderTargetSize;
     int fMaxTextureSize;
     int fMaxTileSize;
     int fMaxColorSampleCount;
     int fMaxStencilSampleCount;
+    int fMaxRasterSamples;
 
 private:
     virtual void onApplyOptionsOverrides(const GrContextOptions&) {};
 
     bool fSuppressPrints : 1;
     bool fImmediateFlush: 1;
     bool fDrawPathMasksToCompressedTextureSupport : 1;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif