Remove some unused sample count caps

Change-Id: I4acb620b4b7b4c5bd83d7c7d65808ca8ebbd6804
Reviewed-on: https://skia-review.googlesource.com/101360
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>

include/gpu/GrCaps.h

@@ -241,8 +241,6 @@ protected:
     int fMaxVertexAttributes;
     int fMaxTextureSize;
     int fMaxTileSize;
-    int fMaxColorSampleCount;
-    int fMaxStencilSampleCount;
     int fMaxRasterSamples;
     int fMaxWindowRectangles;
     int fMaxClipAnalyticFPs;

src/gpu/GrCaps.cpp

@@ -70,8 +70,6 @@ GrCaps::GrCaps(const GrContextOptions& options) {
     fMaxVertexAttributes = 0;
     fMaxRenderTargetSize = 1;
     fMaxTextureSize = 1;
-    fMaxColorSampleCount = 0;
-    fMaxStencilSampleCount = 0;
     fMaxRasterSamples = 0;
     fMaxWindowRectangles = 0;
 
@@ -180,8 +178,6 @@ void GrCaps::dumpJSON(SkJSONWriter* writer) const {
     writer->appendS32("Max Vertex Attributes", fMaxVertexAttributes);
     writer->appendS32("Max Texture Size", fMaxTextureSize);
     writer->appendS32("Max Render Target Size", fMaxRenderTargetSize);
-    writer->appendS32("Max Color Sample Count", fMaxColorSampleCount);
-    writer->appendS32("Max Stencil Sample Count", fMaxStencilSampleCount);
     writer->appendS32("Max Raster Samples", fMaxRasterSamples);
     writer->appendS32("Max Window Rectangles", fMaxWindowRectangles);
     writer->appendS32("Max Clip Analytic Fragment Processors", fMaxClipAnalyticFPs);

src/gpu/gl/GrGLCaps.cpp

@@ -1012,19 +1012,10 @@ void GrGLCaps::initFSAASupport(const GrContextOptions& contextOptions, const GrG
         fMSFBOType = kNone_MSFBOType;
     }
 
-    if (GrGLCaps::kES_IMG_MsToTexture_MSFBOType == fMSFBOType) {
-        GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES_IMG, &fMaxStencilSampleCount);
-    } else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) {
-        GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &fMaxStencilSampleCount);
-    }
     // We only have a use for raster multisample if there is coverage modulation from mixed samples.
     if (fUsesMixedSamples && ctxInfo.hasExtension("GL_EXT_raster_multisample")) {
         GR_GL_GetIntegerv(gli, GR_GL_MAX_RASTER_SAMPLES, &fMaxRasterSamples);
-        // This is to guard against platforms that may not support as many samples for
-        // glRasterSamples as they do for framebuffers.
-        fMaxStencilSampleCount = SkTMin(fMaxStencilSampleCount, fMaxRasterSamples);
     }
-    fMaxColorSampleCount = fMaxStencilSampleCount;
 }
 
 void GrGLCaps::initBlendEqationSupport(const GrGLContextInfo& ctxInfo) {
@@ -1989,10 +1980,19 @@ void GrGLCaps::initConfigTable(const GrContextOptions& contextOptions,
                     delete[] temp;
                 }
             } else {
-                static const int kDefaultSamples[] = {0,1,2,4,8};
+                // Fake out the table using some semi-standard counts up to the max allowed sample
+                // count.
+                int maxSampleCnt = 0;
+                if (GrGLCaps::kES_IMG_MsToTexture_MSFBOType == fMSFBOType) {
+                    GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES_IMG, &maxSampleCnt);
+                } else if (GrGLCaps::kNone_MSFBOType != fMSFBOType) {
+                    GR_GL_GetIntegerv(gli, GR_GL_MAX_SAMPLES, &maxSampleCnt);
+                }
+
+                static constexpr int kDefaultSamples[] = {0, 1, 2, 4, 8};
                 int count = SK_ARRAY_COUNT(kDefaultSamples);
                 for (; count > 0; --count) {
-                    if (kDefaultSamples[count-1] <= fMaxColorSampleCount) {
+                    if (kDefaultSamples[count - 1] <= maxSampleCnt) {
                         break;
                     }
                 }

src/gpu/mtl/GrMtlCaps.h

@@ -70,7 +70,6 @@ private:
 
     void initGrCaps(const id<MTLDevice> device);
     void initShaderCaps();
-    void initSampleCount();
     void initConfigTable();
 
     struct ConfigInfo {

src/gpu/mtl/GrMtlCaps.mm

@@ -162,9 +162,6 @@ void GrMtlCaps::initGrCaps(const id<MTLDevice> device) {
 
     fFenceSyncSupport = true;   // always available in Metal
     fCrossContextTextureSupport = false;
-
-    fMaxColorSampleCount = 4; // minimum required by spec
-    fMaxStencilSampleCount = 4; // minimum required by spec
 }
 
 int GrMtlCaps::getSampleCount(int requestedCount, GrPixelConfig config) const {

src/gpu/vk/GrVkCaps.cpp

@@ -46,8 +46,6 @@ GrVkCaps::GrVkCaps(const GrContextOptions& contextOptions, const GrVkInterface*
 
     fMaxRenderTargetSize = 4096; // minimum required by spec
     fMaxTextureSize = 4096; // minimum required by spec
-    fMaxColorSampleCount = 4; // minimum required by spec
-    fMaxStencilSampleCount = 4; // minimum required by spec
 
     fShaderCaps.reset(new GrShaderCaps(contextOptions));
 
@@ -148,17 +146,6 @@ int get_max_sample_count(VkSampleCountFlags flags) {
     return 64;
 }
 
-void GrVkCaps::initSampleCount(const VkPhysicalDeviceProperties& properties) {
-    VkSampleCountFlags colorSamples = properties.limits.framebufferColorSampleCounts;
-    VkSampleCountFlags stencilSamples = properties.limits.framebufferStencilSampleCounts;
-
-    fMaxColorSampleCount = get_max_sample_count(colorSamples);
-    if (kImagination_VkVendor == properties.vendorID) {
-        fMaxColorSampleCount = 0;
-    }
-    fMaxStencilSampleCount = get_max_sample_count(stencilSamples);
-}
-
 void GrVkCaps::initGrCaps(const VkPhysicalDeviceProperties& properties,
                           const VkPhysicalDeviceMemoryProperties& memoryProperties,
                           uint32_t featureFlags) {
@@ -178,8 +165,6 @@ void GrVkCaps::initGrCaps(const VkPhysicalDeviceProperties& properties,
     fMaxRenderTargetSize = SkTMin(properties.limits.maxImageDimension2D, (uint32_t)INT_MAX);
     fMaxTextureSize = SkTMin(properties.limits.maxImageDimension2D, (uint32_t)INT_MAX);
 
-    this->initSampleCount(properties);
-
     // Assuming since we will always map in the end to upload the data we might as well just map
     // from the get go. There is no hard data to suggest this is faster or slower.
     fBufferMapThreshold = 0;

src/gpu/vk/GrVkCaps.h

@@ -130,8 +130,6 @@ private:
                     const VkPhysicalDeviceMemoryProperties&,
                     uint32_t featureFlags);
     void initShaderCaps(const VkPhysicalDeviceProperties&, uint32_t featureFlags);
-    void initSampleCount(const VkPhysicalDeviceProperties& properties);
-
 
     void initConfigTable(const GrVkInterface*, VkPhysicalDevice, const VkPhysicalDeviceProperties&);
     void initStencilFormat(const GrVkInterface* iface, VkPhysicalDevice physDev);