Rip out CSAA support

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"
 #include "SkTSearch.h"
 #include "SkTSort.h"
 
 SK_DEFINE_INST_COUNT(GrGLCaps)
 
 GrGLCaps::GrGLCaps() {
     this->reset();
 }
 
 void GrGLCaps::reset() {
     INHERITED::reset();
 
     fVerifiedColorConfigs.reset();
     fStencilFormats.reset();
     fStencilVerifiedColorConfigs.reset();
     fMSFBOType = kNone_MSFBOType;
-    fCoverageAAType = kNone_CoverageAAType;
     fFBFetchType = kNone_FBFetchType;
     fMaxFragmentUniformVectors = 0;
     fMaxVertexAttributes = 0;
     fMaxFragmentTextureUnits = 0;
     fMaxFixedFunctionTextureCoords = 0;
     fRGBA8RenderbufferSupport = false;
     fBGRAFormatSupport = false;
     fBGRAIsInternalFormat = false;
     fTextureSwizzleSupport = false;
     fUnpackRowLengthSupport = false;
@@ skipping 20 matching lines @@
 GrGLCaps& GrGLCaps::operator = (const GrGLCaps& caps) {
     INHERITED::operator=(caps);
     fVerifiedColorConfigs = caps.fVerifiedColorConfigs;
     fStencilFormats = caps.fStencilFormats;
     fStencilVerifiedColorConfigs = caps.fStencilVerifiedColorConfigs;
     fMaxFragmentUniformVectors = caps.fMaxFragmentUniformVectors;
     fMaxVertexAttributes = caps.fMaxVertexAttributes;
     fMaxFragmentTextureUnits = caps.fMaxFragmentTextureUnits;
     fMaxFixedFunctionTextureCoords = caps.fMaxFixedFunctionTextureCoords;
     fMSFBOType = caps.fMSFBOType;
-    fCoverageAAType = caps.fCoverageAAType;
-    fMSAACoverageModes = caps.fMSAACoverageModes;
     fFBFetchType = caps.fFBFetchType;
     fRGBA8RenderbufferSupport = caps.fRGBA8RenderbufferSupport;
     fBGRAFormatSupport = caps.fBGRAFormatSupport;
     fBGRAIsInternalFormat = caps.fBGRAIsInternalFormat;
     fTextureSwizzleSupport = caps.fTextureSwizzleSupport;
     fUnpackRowLengthSupport = caps.fUnpackRowLengthSupport;
     fUnpackFlipYSupport = caps.fUnpackFlipYSupport;
     fPackRowLengthSupport = caps.fPackRowLengthSupport;
     fPackFlipYSupport = caps.fPackFlipYSupport;
     fTextureUsageSupport = caps.fTextureUsageSupport;
@@ skipping 281 matching lines @@
                       GR_GL_IMPLEMENTATION_COLOR_READ_FORMAT,
                       &otherFormat);
 
     GR_GL_GetIntegerv(intf,
                       GR_GL_IMPLEMENTATION_COLOR_READ_TYPE,
                       &otherType);
 
     return (GrGLenum)otherFormat == format && (GrGLenum)otherType == type;
 }
 
-namespace {
-bool cov_mode_less(const GrGLCaps::MSAACoverageMode& left,
-                   const GrGLCaps::MSAACoverageMode& right) {
-    if (left.fCoverageSampleCnt < right.fCoverageSampleCnt) {
-        return true;
-    } else if (right.fCoverageSampleCnt < left.fCoverageSampleCnt) {
-        return false;
-    } else if (left.fColorSampleCnt < right.fColorSampleCnt) {
-        return true;
-    }
-    return false;
-}
-}
-
 void GrGLCaps::initFSAASupport(const GrGLContextInfo& ctxInfo, const GrGLInterface* gli) {
 
     fMSFBOType = kNone_MSFBOType;
     if (kDesktop_GrGLBinding != ctxInfo.binding()) {
         // We prefer the EXT/IMG extension over ES3 MSAA because we've observed
         // ES3 driver bugs on at least one device with a tiled GPU (N10).
         if (ctxInfo.hasExtension("GL_EXT_multisampled_render_to_texture")) {
             fMSFBOType = kES_EXT_MsToTexture_MSFBOType;
         } else if (ctxInfo.hasExtension("GL_IMG_multisampled_render_to_texture")) {
             fMSFBOType = kES_IMG_MsToTexture_MSFBOType;
         } else if (!GR_GL_IGNORE_ES3_MSAA && ctxInfo.version() >= GR_GL_VER(3,0)) {
             fMSFBOType = GrGLCaps::kES_3_0_MSFBOType;
         } else if (ctxInfo.hasExtension("GL_CHROMIUM_framebuffer_multisample")) {
             // chrome's extension is equivalent to the EXT msaa
             // and fbo_blit extensions.
             fMSFBOType = kDesktop_EXT_MSFBOType;
         } else if (ctxInfo.hasExtension("GL_APPLE_framebuffer_multisample")) {
             fMSFBOType = kES_Apple_MSFBOType;
         }
     } else {
         if ((ctxInfo.version() >= GR_GL_VER(3,0)) ||
             ctxInfo.hasExtension("GL_ARB_framebuffer_object")) {
             fMSFBOType = GrGLCaps::kDesktop_ARB_MSFBOType;
         } else if (ctxInfo.hasExtension("GL_EXT_framebuffer_multisample") &&
                    ctxInfo.hasExtension("GL_EXT_framebuffer_blit")) {
             fMSFBOType = GrGLCaps::kDesktop_EXT_MSFBOType;
         }
-        // TODO: We could populate fMSAACoverageModes using GetInternalformativ
-        // on GL 4.2+. It's format-specific, though. See also
-        // http://code.google.com/p/skia/issues/detail?id=470 about using actual
-        // rather than requested sample counts in cache key.
-        if (ctxInfo.hasExtension("GL_NV_framebuffer_multisample_coverage")) {
-            fCoverageAAType = kNVDesktop_CoverageAAType;
-            GrGLint count;
-            GR_GL_GetIntegerv(gli,
-                              GR_GL_MAX_MULTISAMPLE_COVERAGE_MODES,
-                              &count);
-            fMSAACoverageModes.setCount(count);
-            GR_GL_GetIntegerv(gli,
-                              GR_GL_MULTISAMPLE_COVERAGE_MODES,
-                              (int*)&fMSAACoverageModes[0]);
-            // The NV driver seems to return the modes already sorted but the
-            // spec doesn't require this. So we sort.
-            typedef SkTLessFunctionToFunctorAdaptor<MSAACoverageMode, cov_mode_less> SortFunctor;
-            SortFunctor sortFunctor;
-            SkTQSort<MSAACoverageMode, SortFunctor>(fMSAACoverageModes.begin(),
-                                                    fMSAACoverageModes.end() - 1,
-                                                    sortFunctor);
-        }
     }
 }
 
-const GrGLCaps::MSAACoverageMode& GrGLCaps::getMSAACoverageMode(int desiredSampleCount) const {
-    static const MSAACoverageMode kNoneMode = {0, 0};
-    if (0 == fMSAACoverageModes.count()) {
-        return kNoneMode;
-    } else {
-        SkASSERT(kNone_CoverageAAType != fCoverageAAType);
-        int max = (fMSAACoverageModes.end() - 1)->fCoverageSampleCnt;
-        desiredSampleCount = GrMin(desiredSampleCount, max);
-        MSAACoverageMode desiredMode = {desiredSampleCount, 0};
-        int idx = SkTSearch<const MSAACoverageMode, cov_mode_less>(&fMSAACoverageModes[0],
-                                                                   fMSAACoverageModes.count(),
-                                                                   desiredMode,
-                                                                   sizeof(MSAACoverageMode));
-        if (idx < 0) {
-            idx = ~idx;
-        }
-        SkASSERT(idx >= 0 && idx < fMSAACoverageModes.count());
-        return fMSAACoverageModes[idx];
-    }
-}
-
 namespace {
 const GrGLuint kUnknownBitCount = GrGLStencilBuffer::kUnknownBitCount;
 }
 
 void GrGLCaps::initStencilFormats(const GrGLContextInfo& ctxInfo) {
 
     // Build up list of legal stencil formats (though perhaps not supported on
     // the particular gpu/driver) from most preferred to least.
 
     // these consts are in order of most preferred to least preferred
@@ skipping 154 matching lines @@
     GrPrintf("GL_R support: %s\n", (fTextureRedSupport ? "YES": "NO"));
     GrPrintf("GL_ARB_imaging support: %s\n", (fImagingSupport ? "YES": "NO"));
     GrPrintf("Two Format Limit: %s\n", (fTwoFormatLimit ? "YES": "NO"));
     GrPrintf("Fragment coord conventions support: %s\n",
              (fFragCoordsConventionSupport ? "YES": "NO"));
     GrPrintf("Vertex array object support: %s\n", (fVertexArrayObjectSupport ? "YES": "NO"));
     GrPrintf("Use non-VBO for dynamic data: %s\n",
              (fUseNonVBOVertexAndIndexDynamicData ? "YES" : "NO"));
     GrPrintf("Discard FrameBuffer support: %s\n", (fDiscardFBSupport ? "YES" : "NO"));
 }