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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "src/gpu/GrCaps.h"
#include "include/gpu/GrBackendSurface.h"
#include "include/gpu/GrContextOptions.h"
#include "include/private/GrTypesPriv.h"
#include "src/gpu/GrBackendUtils.h"
#include "src/gpu/GrRenderTargetProxy.h"
#include "src/gpu/GrSurface.h"
#include "src/gpu/GrSurfaceProxy.h"
#include "src/gpu/GrWindowRectangles.h"
#include "src/utils/SkJSONWriter.h"
GrCaps::GrCaps(const GrContextOptions& options) {
fMipmapSupport = false;
fNPOTTextureTileSupport = false;
fReuseScratchTextures = true;
fReuseScratchBuffers = true;
fGpuTracingSupport = false;
fOversizedStencilSupport = false;
fTextureBarrierSupport = false;
fSampleLocationsSupport = false;
fMultisampleDisableSupport = false;
fDrawInstancedSupport = false;
fNativeDrawIndirectSupport = false;
fUseClientSideIndirectBuffers = false;
fConservativeRasterSupport = false;
fWireframeSupport = false;
fMSAAResolvesAutomatically = false;
fUsePrimitiveRestart = false;
fPreferClientSideDynamicBuffers = false;
fPreferFullscreenClears = false;
fTwoSidedStencilRefsAndMasksMustMatch = false;
fMustClearUploadedBufferData = false;
fShouldInitializeTextures = false;
fSupportsAHardwareBufferImages = false;
fFenceSyncSupport = false;
fSemaphoreSupport = false;
fCrossContextTextureSupport = false;
fHalfFloatVertexAttributeSupport = false;
fDynamicStateArrayGeometryProcessorTextureSupport = false;
fPerformPartialClearsAsDraws = false;
fPerformColorClearsAsDraws = false;
fAvoidLargeIndexBufferDraws = false;
fPerformStencilClearsAsDraws = false;
fTransferFromBufferToTextureSupport = false;
fTransferFromSurfaceToBufferSupport = false;
fWritePixelsRowBytesSupport = false;
fTransferPixelsToRowBytesSupport = false;
fReadPixelsRowBytesSupport = false;
fShouldCollapseSrcOverToSrcWhenAble = false;
fMustSyncGpuDuringAbandon = true;
fDriverDisableMSAAClipAtlas = false;
fDisableTessellationPathRenderer = false;
fBlendEquationSupport = kBasic_BlendEquationSupport;
fAdvBlendEqDisableFlags = 0;
fMapBufferFlags = kNone_MapFlags;
fMaxVertexAttributes = 0;
fMaxRenderTargetSize = 1;
fMaxPreferredRenderTargetSize = 1;
fMaxTextureSize = 1;
fMaxWindowRectangles = 0;
fInternalMultisampleCount = 0;
fSuppressPrints = options.fSuppressPrints;
#if GR_TEST_UTILS
fWireframeMode = options.fWireframeMode;
#else
fWireframeMode = false;
#endif
fBufferMapThreshold = options.fBufferMapThreshold;
fAvoidStencilBuffers = false;
fAvoidWritePixelsFastPath = false;
fRequiresManualFBBarrierAfterTessellatedStencilDraw = false;
fNativeDrawIndexedIndirectIsBroken = false;
fAvoidReorderingRenderTasks = false;
fPreferVRAMUseOverFlushes = true;
// Default to true, allow older versions of OpenGL to disable explicitly
fClampToBorderSupport = true;
fDriverBugWorkarounds = options.fDriverBugWorkarounds;
}
void GrCaps::finishInitialization(const GrContextOptions& options) {
if (!fNativeDrawIndirectSupport) {
// We will implement indirect draws with a polyfill, so the commands need to reside in CPU
// memory.
fUseClientSideIndirectBuffers = true;
}
this->applyOptionsOverrides(options);
// Our render targets are always created with textures as the color attachment, hence this min:
fMaxRenderTargetSize = std::min(fMaxRenderTargetSize, fMaxTextureSize);
fMaxPreferredRenderTargetSize = std::min(fMaxPreferredRenderTargetSize, fMaxRenderTargetSize);
}
void GrCaps::applyOptionsOverrides(const GrContextOptions& options) {
fShaderCaps->applyOptionsOverrides(options);
this->onApplyOptionsOverrides(options);
if (options.fDisableDriverCorrectnessWorkarounds) {
SkASSERT(!fDriverDisableMSAAClipAtlas);
SkASSERT(!fDisableTessellationPathRenderer);
SkASSERT(!fAvoidStencilBuffers);
SkASSERT(!fAvoidWritePixelsFastPath);
SkASSERT(!fRequiresManualFBBarrierAfterTessellatedStencilDraw);
SkASSERT(!fNativeDrawIndexedIndirectIsBroken);
SkASSERT(!fAdvBlendEqDisableFlags);
SkASSERT(!fPerformColorClearsAsDraws);
SkASSERT(!fPerformStencilClearsAsDraws);
// Don't check the partial-clear workaround, since that is a backend limitation, not a
// driver workaround (it just so happens the fallbacks are the same).
}
if (GrContextOptions::Enable::kNo == options.fUseDrawInsteadOfClear) {
fPerformColorClearsAsDraws = false;
fPerformStencilClearsAsDraws = false;
} else if (GrContextOptions::Enable::kYes == options.fUseDrawInsteadOfClear) {
fPerformColorClearsAsDraws = true;
fPerformStencilClearsAsDraws = true;
}
fMaxTextureSize = std::min(fMaxTextureSize, options.fMaxTextureSizeOverride);
#if GR_TEST_UTILS
if (options.fSuppressAdvancedBlendEquations) {
fBlendEquationSupport = kBasic_BlendEquationSupport;
}
if (options.fClearAllTextures) {
fShouldInitializeTextures = true;
}
if (options.fDisallowWriteAndTransferPixelRowBytes) {
fWritePixelsRowBytesSupport = false;
fTransferPixelsToRowBytesSupport = false;
}
if (options.fAlwaysPreferHardwareTessellation) {
fMinPathVerbsForHwTessellation = fMinStrokeVerbsForHwTessellation = 0;
}
#endif
if (options.fSuppressMipmapSupport) {
fMipmapSupport = false;
}
if (fMaxWindowRectangles > GrWindowRectangles::kMaxWindows) {
SkDebugf("WARNING: capping window rectangles at %i. HW advertises support for %i.\n",
GrWindowRectangles::kMaxWindows, fMaxWindowRectangles);
fMaxWindowRectangles = GrWindowRectangles::kMaxWindows;
}
fInternalMultisampleCount = options.fInternalMultisampleCount;
fAvoidStencilBuffers = options.fAvoidStencilBuffers;
fDriverBugWorkarounds.applyOverrides(options.fDriverBugWorkarounds);
}
#ifdef SK_ENABLE_DUMP_GPU
#include "src/gpu/GrTestUtils.h"
static SkString map_flags_to_string(uint32_t flags) {
SkString str;
if (GrCaps::kNone_MapFlags == flags) {
str = "none";
} else {
SkASSERT(GrCaps::kCanMap_MapFlag & flags);
SkDEBUGCODE(flags &= ~GrCaps::kCanMap_MapFlag);
str = "can_map";
if (GrCaps::kSubset_MapFlag & flags) {
str.append(" partial");
} else {
str.append(" full");
}
SkDEBUGCODE(flags &= ~GrCaps::kSubset_MapFlag);
if (GrCaps::kAsyncRead_MapFlag & flags) {
str.append(" async_read");
} else {
str.append(" sync_read");
}
SkDEBUGCODE(flags &= ~GrCaps::kAsyncRead_MapFlag);
}
SkASSERT(0 == flags); // Make sure we handled all the flags.
return str;
}
void GrCaps::dumpJSON(SkJSONWriter* writer) const {
writer->beginObject();
writer->appendBool("MIP Map Support", fMipmapSupport);
writer->appendBool("NPOT Texture Tile Support", fNPOTTextureTileSupport);
writer->appendBool("Reuse Scratch Textures", fReuseScratchTextures);
writer->appendBool("Reuse Scratch Buffers", fReuseScratchBuffers);
writer->appendBool("Gpu Tracing Support", fGpuTracingSupport);
writer->appendBool("Oversized Stencil Support", fOversizedStencilSupport);
writer->appendBool("Texture Barrier Support", fTextureBarrierSupport);
writer->appendBool("Sample Locations Support", fSampleLocationsSupport);
writer->appendBool("Multisample disable support", fMultisampleDisableSupport);
writer->appendBool("Draw Instanced Support", fDrawInstancedSupport);
writer->appendBool("Native Draw Indirect Support", fNativeDrawIndirectSupport);
writer->appendBool("Use client side indirect buffers", fUseClientSideIndirectBuffers);
writer->appendBool("Conservative Raster Support", fConservativeRasterSupport);
writer->appendBool("Wireframe Support", fWireframeSupport);
writer->appendBool("MSAA Resolves Automatically", fMSAAResolvesAutomatically);
writer->appendBool("Use primitive restart", fUsePrimitiveRestart);
writer->appendBool("Prefer client-side dynamic buffers", fPreferClientSideDynamicBuffers);
writer->appendBool("Prefer fullscreen clears (and stencil discard)", fPreferFullscreenClears);
writer->appendBool("Two-sided Stencil Refs And Masks Must Match",
fTwoSidedStencilRefsAndMasksMustMatch);
writer->appendBool("Must clear buffer memory", fMustClearUploadedBufferData);
writer->appendBool("Should initialize textures", fShouldInitializeTextures);
writer->appendBool("Supports importing AHardwareBuffers", fSupportsAHardwareBufferImages);
writer->appendBool("Fence sync support", fFenceSyncSupport);
writer->appendBool("Semaphore support", fSemaphoreSupport);
writer->appendBool("Cross context texture support", fCrossContextTextureSupport);
writer->appendBool("Half float vertex attribute support", fHalfFloatVertexAttributeSupport);
writer->appendBool("Specify GeometryProcessor textures as a dynamic state array",
fDynamicStateArrayGeometryProcessorTextureSupport);
writer->appendBool("Use draws for partial clears", fPerformPartialClearsAsDraws);
writer->appendBool("Use draws for color clears", fPerformColorClearsAsDraws);
writer->appendBool("Avoid Large IndexBuffer Draws", fAvoidLargeIndexBufferDraws);
writer->appendBool("Use draws for stencil clip clears", fPerformStencilClearsAsDraws);
writer->appendBool("Supports transfers from buffers to textures",
fTransferFromBufferToTextureSupport);
writer->appendBool("Supports transfers from textures to buffers",
fTransferFromSurfaceToBufferSupport);
writer->appendBool("Write pixels row bytes support", fWritePixelsRowBytesSupport);
writer->appendBool("Transfer pixels to row bytes support", fTransferPixelsToRowBytesSupport);
writer->appendBool("Read pixels row bytes support", fReadPixelsRowBytesSupport);
writer->appendBool("Disable msaa clip mask atlas on current driver [workaround]",
fDriverDisableMSAAClipAtlas);
writer->appendBool("Disable GrTessellationPathRenderer current driver [workaround]",
fDisableTessellationPathRenderer);
writer->appendBool("Clamp-to-border", fClampToBorderSupport);
writer->appendBool("Prefer VRAM Use over flushes [workaround]", fPreferVRAMUseOverFlushes);
writer->appendBool("Avoid stencil buffers [workaround]", fAvoidStencilBuffers);
writer->appendBool("Avoid writePixels fast path [workaround]", fAvoidWritePixelsFastPath);
writer->appendBool("Requires manual FB barrier after tessellated stencilDraw [workaround]",
fRequiresManualFBBarrierAfterTessellatedStencilDraw);
writer->appendBool("Native draw indexed indirect is broken [workaround]",
fNativeDrawIndexedIndirectIsBroken);
writer->appendBool("Avoid DAG reordering [workaround]", fAvoidReorderingRenderTasks);
if (this->advancedBlendEquationSupport()) {
writer->appendHexU32("Advanced Blend Equation Disable Flags", fAdvBlendEqDisableFlags);
}
writer->appendS32("Max Vertex Attributes", fMaxVertexAttributes);
writer->appendS32("Max Texture Size", fMaxTextureSize);
writer->appendS32("Max Render Target Size", fMaxRenderTargetSize);
writer->appendS32("Max Preferred Render Target Size", fMaxPreferredRenderTargetSize);
writer->appendS32("Max Window Rectangles", fMaxWindowRectangles);
writer->appendS32("Sample Count for Internal MSAA", fInternalMultisampleCount);
writer->appendS32("Min Path Verbs for HW Tessellation", fMinPathVerbsForHwTessellation);
writer->appendS32("Min Stroke Verbs for HW Tessellation", fMinStrokeVerbsForHwTessellation);
static const char* kBlendEquationSupportNames[] = {
"Basic",
"Advanced",
"Advanced Coherent",
};
static_assert(0 == kBasic_BlendEquationSupport);
static_assert(1 == kAdvanced_BlendEquationSupport);
static_assert(2 == kAdvancedCoherent_BlendEquationSupport);
static_assert(SK_ARRAY_COUNT(kBlendEquationSupportNames) == kLast_BlendEquationSupport + 1);
writer->appendString("Blend Equation Support",
kBlendEquationSupportNames[fBlendEquationSupport]);
writer->appendString("Map Buffer Support", map_flags_to_string(fMapBufferFlags).c_str());
this->onDumpJSON(writer);
writer->appendName("shaderCaps");
this->shaderCaps()->dumpJSON(writer);
writer->endObject();
}
#else
void GrCaps::dumpJSON(SkJSONWriter* writer) const { }
#endif
bool GrCaps::surfaceSupportsWritePixels(const GrSurface* surface) const {
return surface->readOnly() ? false : this->onSurfaceSupportsWritePixels(surface);
}
bool GrCaps::canCopySurface(const GrSurfaceProxy* dst, const GrSurfaceProxy* src,
const SkIRect& srcRect, const SkIPoint& dstPoint) const {
if (dst->readOnly()) {
return false;
}
if (dst->backendFormat() != src->backendFormat()) {
return false;
}
return this->onCanCopySurface(dst, src, srcRect, dstPoint);
}
bool GrCaps::validateSurfaceParams(const SkISize& dimensions, const GrBackendFormat& format,
GrRenderable renderable, int renderTargetSampleCnt,
GrMipmapped mipped) const {
if (!this->isFormatTexturable(format)) {
return false;
}
if (GrMipmapped::kYes == mipped && !this->mipmapSupport()) {
return false;
}
if (dimensions.width() < 1 || dimensions.height() < 1) {
return false;
}
if (renderable == GrRenderable::kYes) {
if (!this->isFormatRenderable(format, renderTargetSampleCnt)) {
return false;
}
int maxRTSize = this->maxRenderTargetSize();
if (dimensions.width() > maxRTSize || dimensions.height() > maxRTSize) {
return false;
}
} else {
// We currently do not support multisampled textures
if (renderTargetSampleCnt != 1) {
return false;
}
int maxSize = this->maxTextureSize();
if (dimensions.width() > maxSize || dimensions.height() > maxSize) {
return false;
}
}
return true;
}
GrCaps::SupportedRead GrCaps::supportedReadPixelsColorType(GrColorType srcColorType,
const GrBackendFormat& srcFormat,
GrColorType dstColorType) const {
SupportedRead read = this->onSupportedReadPixelsColorType(srcColorType, srcFormat,
dstColorType);
// There are known problems with 24 vs 32 bit BPP with this color type. Just fail for now if
// using a transfer buffer.
if (GrColorType::kRGB_888x == read.fColorType) {
read.fOffsetAlignmentForTransferBuffer = 0;
}
// It's very convenient to access 1 byte-per-channel 32 bit color types as uint32_t on the CPU.
// Make those aligned reads out of the buffer even if the underlying API doesn't require it.
auto channelFlags = GrColorTypeChannelFlags(read.fColorType);
if ((channelFlags == kRGBA_SkColorChannelFlags || channelFlags == kRGB_SkColorChannelFlags ||
channelFlags == kAlpha_SkColorChannelFlag || channelFlags == kGray_SkColorChannelFlag) &&
GrColorTypeBytesPerPixel(read.fColorType) == 4) {
switch (read.fOffsetAlignmentForTransferBuffer & 0b11) {
// offset alignment already a multiple of 4
case 0:
break;
// offset alignment is a multiple of 2 but not 4.
case 2:
read.fOffsetAlignmentForTransferBuffer *= 2;
break;
// offset alignment is not a multiple of 2.
default:
read.fOffsetAlignmentForTransferBuffer *= 4;
break;
}
}
return read;
}
GrBackendFormat GrCaps::getDefaultBackendFormat(GrColorType colorType,
GrRenderable renderable) const {
// Unknown color types are always an invalid format, so early out before calling virtual.
if (colorType == GrColorType::kUnknown) {
return {};
}
auto format = this->onGetDefaultBackendFormat(colorType);
if (!this->isFormatTexturable(format)) {
return {};
}
if (!this->areColorTypeAndFormatCompatible(colorType, format)) {
return {};
}
// Currently we require that it be possible to write pixels into the "default" format. Perhaps,
// that could be a separate requirement from the caller. It seems less necessary if
// renderability was requested.
if (this->supportedWritePixelsColorType(colorType, format, colorType).fColorType ==
GrColorType::kUnknown) {
return {};
}
if (renderable == GrRenderable::kYes &&
!this->isFormatAsColorTypeRenderable(colorType, format)) {
return {};
}
return format;
}
bool GrCaps::areColorTypeAndFormatCompatible(GrColorType grCT,
const GrBackendFormat& format) const {
if (GrColorType::kUnknown == grCT) {
return false;
}
SkImage::CompressionType compression = GrBackendFormatToCompressionType(format);
if (compression != SkImage::CompressionType::kNone) {
return grCT == (SkCompressionTypeIsOpaque(compression) ? GrColorType::kRGB_888x
: GrColorType::kRGBA_8888);
}
return this->onAreColorTypeAndFormatCompatible(grCT, format);
}
GrSwizzle GrCaps::getReadSwizzle(const GrBackendFormat& format, GrColorType colorType) const {
SkImage::CompressionType compression = GrBackendFormatToCompressionType(format);
if (compression != SkImage::CompressionType::kNone) {
if (colorType == GrColorType::kRGB_888x || colorType == GrColorType::kRGBA_8888) {
return GrSwizzle::RGBA();
}
SkDEBUGFAILF("Illegal color type (%d) and compressed format (%d) combination.",
(int)colorType, (int)compression);
return {};
}
return this->onGetReadSwizzle(format, colorType);
}
bool GrCaps::isFormatCompressed(const GrBackendFormat& format) const {
return GrBackendFormatToCompressionType(format) != SkImage::CompressionType::kNone;
}
GrDstSampleFlags GrCaps::getDstSampleFlagsForProxy(const GrRenderTargetProxy* rt,
bool drawUsesMSAA) const {
SkASSERT(rt);
if (this->textureBarrierSupport() && (!drawUsesMSAA || this->msaaResolvesAutomatically())) {
return this->onGetDstSampleFlagsForProxy(rt);
}
return GrDstSampleFlags::kNone;
}
bool GrCaps::supportsDynamicMSAA(const GrRenderTargetProxy* rtProxy) const {
return rtProxy->numSamples() == 1 &&
this->internalMultisampleCount(rtProxy->backendFormat()) > 1 &&
this->onSupportsDynamicMSAA(rtProxy);
}
static inline GrColorType color_type_fallback(GrColorType ct) {
switch (ct) {
// kRGBA_8888 is our default fallback for many color types that may not have renderable
// backend formats.
case GrColorType::kAlpha_8:
case GrColorType::kBGR_565:
case GrColorType::kABGR_4444:
case GrColorType::kBGRA_8888:
case GrColorType::kRGBA_1010102:
case GrColorType::kBGRA_1010102:
case GrColorType::kRGBA_F16:
case GrColorType::kRGBA_F16_Clamped:
return GrColorType::kRGBA_8888;
case GrColorType::kAlpha_F16:
return GrColorType::kRGBA_F16;
case GrColorType::kGray_8:
return GrColorType::kRGB_888x;
default:
return GrColorType::kUnknown;
}
}
std::tuple<GrColorType, GrBackendFormat> GrCaps::getFallbackColorTypeAndFormat(
GrColorType ct,
int sampleCnt) const {
do {
auto format = this->getDefaultBackendFormat(ct, GrRenderable::kYes);
// We continue to the fallback color type if there no default renderable format or we
// requested msaa and the format doesn't support msaa.
if (format.isValid() && this->isFormatRenderable(format, sampleCnt)) {
return {ct, format};
}
ct = color_type_fallback(ct);
} while (ct != GrColorType::kUnknown);
return {GrColorType::kUnknown, {}};
}