94efbf51f5
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=5121 Change-Id: If8d13638f80f42161cbc766a2666c5789e5772c8 Reviewed-on: https://skia-review.googlesource.com/5121 Reviewed-by: Ethan Nicholas <ethannicholas@google.com> Commit-Queue: Brian Salomon <bsalomon@google.com>
256 lines
10 KiB
C++
256 lines
10 KiB
C++
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/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrCaps_DEFINED
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#define GrCaps_DEFINED
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#include "GrTypes.h"
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#include "GrTypesPriv.h"
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#include "GrBlend.h"
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#include "GrShaderVar.h"
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#include "GrShaderCaps.h"
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#include "SkRefCnt.h"
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#include "SkString.h"
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struct GrContextOptions;
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/**
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* Represents the capabilities of a GrContext.
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*/
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class GrCaps : public SkRefCnt {
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public:
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GrCaps(const GrContextOptions&);
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virtual SkString dump() const;
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const GrShaderCaps* shaderCaps() const { return fShaderCaps.get(); }
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bool npotTextureTileSupport() const { return fNPOTTextureTileSupport; }
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/** To avoid as-yet-unnecessary complexity we don't allow any partial support of MIP Maps (e.g.
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only for POT textures) */
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bool mipMapSupport() const { return fMipMapSupport; }
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/**
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* Skia convention is that a device only has sRGB support if it supports sRGB formats for both
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* textures and framebuffers. In addition:
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* Decoding to linear of an sRGB texture can be disabled.
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*/
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bool srgbSupport() const { return fSRGBSupport; }
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/**
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* Is there support for enabling/disabling sRGB writes for sRGB-capable color buffers?
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*/
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bool srgbWriteControl() const { return fSRGBWriteControl; }
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bool twoSidedStencilSupport() const { return fTwoSidedStencilSupport; }
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bool stencilWrapOpsSupport() const { return fStencilWrapOpsSupport; }
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bool discardRenderTargetSupport() const { return fDiscardRenderTargetSupport; }
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bool gpuTracingSupport() const { return fGpuTracingSupport; }
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bool compressedTexSubImageSupport() const { return fCompressedTexSubImageSupport; }
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bool oversizedStencilSupport() const { return fOversizedStencilSupport; }
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bool textureBarrierSupport() const { return fTextureBarrierSupport; }
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bool sampleLocationsSupport() const { return fSampleLocationsSupport; }
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bool multisampleDisableSupport() const { return fMultisampleDisableSupport; }
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bool usesMixedSamples() const { return fUsesMixedSamples; }
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bool preferClientSideDynamicBuffers() const { return fPreferClientSideDynamicBuffers; }
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bool useDrawInsteadOfClear() const { return fUseDrawInsteadOfClear; }
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bool useDrawInsteadOfPartialRenderTargetWrite() const {
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return fUseDrawInsteadOfPartialRenderTargetWrite;
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}
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bool useDrawInsteadOfAllRenderTargetWrites() const {
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return fUseDrawInsteadOfAllRenderTargetWrites;
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}
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bool preferVRAMUseOverFlushes() const { return fPreferVRAMUseOverFlushes; }
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/**
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* Indicates the level of support for gr_instanced::* functionality. A higher level includes
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* all functionality from the levels below it.
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*/
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enum class InstancedSupport {
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kNone,
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kBasic,
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kMultisampled,
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kMixedSampled
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};
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InstancedSupport instancedSupport() const { return fInstancedSupport; }
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bool avoidInstancedDrawsToFPTargets() const { return fAvoidInstancedDrawsToFPTargets; }
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/**
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* Indicates the capabilities of the fixed function blend unit.
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*/
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enum BlendEquationSupport {
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kBasic_BlendEquationSupport, //<! Support to select the operator that
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// combines src and dst terms.
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kAdvanced_BlendEquationSupport, //<! Additional fixed function support for specific
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// SVG/PDF blend modes. Requires blend barriers.
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kAdvancedCoherent_BlendEquationSupport, //<! Advanced blend equation support that does not
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// require blend barriers, and permits overlap.
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kLast_BlendEquationSupport = kAdvancedCoherent_BlendEquationSupport
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};
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BlendEquationSupport blendEquationSupport() const { return fBlendEquationSupport; }
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bool advancedBlendEquationSupport() const {
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return fBlendEquationSupport >= kAdvanced_BlendEquationSupport;
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}
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bool advancedCoherentBlendEquationSupport() const {
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return kAdvancedCoherent_BlendEquationSupport == fBlendEquationSupport;
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}
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bool canUseAdvancedBlendEquation(GrBlendEquation equation) const {
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SkASSERT(GrBlendEquationIsAdvanced(equation));
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return SkToBool(fAdvBlendEqBlacklist & (1 << equation));
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}
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/**
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* Indicates whether GPU->CPU memory mapping for GPU resources such as vertex buffers and
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* textures allows partial mappings or full mappings.
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*/
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enum MapFlags {
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kNone_MapFlags = 0x0, //<! Cannot map the resource.
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kCanMap_MapFlag = 0x1, //<! The resource can be mapped. Must be set for any of
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// the other flags to have meaning.k
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kSubset_MapFlag = 0x2, //<! The resource can be partially mapped.
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};
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uint32_t mapBufferFlags() const { return fMapBufferFlags; }
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// Scratch textures not being reused means that those scratch textures
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// that we upload to (i.e., don't have a render target) will not be
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// recycled in the texture cache. This is to prevent ghosting by drivers
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// (in particular for deferred architectures).
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bool reuseScratchTextures() const { return fReuseScratchTextures; }
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bool reuseScratchBuffers() const { return fReuseScratchBuffers; }
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/// maximum number of attribute values per vertex
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int maxVertexAttributes() const { return fMaxVertexAttributes; }
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int maxRenderTargetSize() const { return fMaxRenderTargetSize; }
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int maxTextureSize() const { return fMaxTextureSize; }
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/** This is the maximum tile size to use by GPU devices for rendering sw-backed images/bitmaps.
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It is usually the max texture size, unless we're overriding it for testing. */
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int maxTileSize() const { SkASSERT(fMaxTileSize <= fMaxTextureSize); return fMaxTileSize; }
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// Will be 0 if MSAA is not supported
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int maxColorSampleCount() const { return fMaxColorSampleCount; }
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// Will be 0 if MSAA is not supported
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int maxStencilSampleCount() const { return fMaxStencilSampleCount; }
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// Will be 0 if raster multisample is not supported. Raster multisample is a special HW mode
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// where the rasterizer runs with more samples than are in the target framebuffer.
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int maxRasterSamples() const { return fMaxRasterSamples; }
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// We require the sample count to be less than maxColorSampleCount and maxStencilSampleCount.
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// If we are using mixed samples, we only care about stencil.
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int maxSampleCount() const {
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if (this->usesMixedSamples()) {
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return this->maxStencilSampleCount();
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} else {
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return SkTMin(this->maxColorSampleCount(), this->maxStencilSampleCount());
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}
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}
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int maxWindowRectangles() const { return fMaxWindowRectangles; }
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virtual bool isConfigTexturable(GrPixelConfig config) const = 0;
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virtual bool isConfigRenderable(GrPixelConfig config, bool withMSAA) const = 0;
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virtual bool canConfigBeImageStorage(GrPixelConfig config) const = 0;
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bool suppressPrints() const { return fSuppressPrints; }
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bool immediateFlush() const { return fImmediateFlush; }
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size_t bufferMapThreshold() const {
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SkASSERT(fBufferMapThreshold >= 0);
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return fBufferMapThreshold;
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}
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bool fullClearIsFree() const { return fFullClearIsFree; }
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/** True in environments that will issue errors if memory uploaded to buffers
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is not initialized (even if not read by draw calls). */
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bool mustClearUploadedBufferData() const { return fMustClearUploadedBufferData; }
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bool sampleShadingSupport() const { return fSampleShadingSupport; }
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bool fenceSyncSupport() const { return fFenceSyncSupport; }
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protected:
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/** Subclasses must call this at the end of their constructors in order to apply caps
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overrides requested by the client. Note that overrides will only reduce the caps never
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expand them. */
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void applyOptionsOverrides(const GrContextOptions& options);
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sk_sp<GrShaderCaps> fShaderCaps;
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bool fNPOTTextureTileSupport : 1;
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bool fMipMapSupport : 1;
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bool fSRGBSupport : 1;
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bool fSRGBWriteControl : 1;
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bool fTwoSidedStencilSupport : 1;
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bool fStencilWrapOpsSupport : 1;
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bool fDiscardRenderTargetSupport : 1;
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bool fReuseScratchTextures : 1;
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bool fReuseScratchBuffers : 1;
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bool fGpuTracingSupport : 1;
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bool fCompressedTexSubImageSupport : 1;
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bool fOversizedStencilSupport : 1;
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bool fTextureBarrierSupport : 1;
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bool fSampleLocationsSupport : 1;
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bool fMultisampleDisableSupport : 1;
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bool fUsesMixedSamples : 1;
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bool fPreferClientSideDynamicBuffers : 1;
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bool fFullClearIsFree : 1;
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bool fMustClearUploadedBufferData : 1;
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// Driver workaround
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bool fUseDrawInsteadOfClear : 1;
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bool fUseDrawInsteadOfPartialRenderTargetWrite : 1;
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bool fUseDrawInsteadOfAllRenderTargetWrites : 1;
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bool fAvoidInstancedDrawsToFPTargets : 1;
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// ANGLE workaround
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bool fPreferVRAMUseOverFlushes : 1;
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bool fSampleShadingSupport : 1;
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// TODO: this may need to be an enum to support different fence types
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bool fFenceSyncSupport : 1;
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InstancedSupport fInstancedSupport;
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BlendEquationSupport fBlendEquationSupport;
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uint32_t fAdvBlendEqBlacklist;
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GR_STATIC_ASSERT(kLast_GrBlendEquation < 32);
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uint32_t fMapBufferFlags;
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int fBufferMapThreshold;
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int fMaxRenderTargetSize;
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int fMaxVertexAttributes;
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int fMaxTextureSize;
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int fMaxTileSize;
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int fMaxColorSampleCount;
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int fMaxStencilSampleCount;
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int fMaxRasterSamples;
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int fMaxWindowRectangles;
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private:
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virtual void onApplyOptionsOverrides(const GrContextOptions&) {}
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bool fSuppressPrints : 1;
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bool fImmediateFlush: 1;
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typedef SkRefCnt INHERITED;
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};
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#endif
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