| /* |
| * Copyright 2011 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| |
| #ifndef GrGLRenderTarget_DEFINED |
| #define GrGLRenderTarget_DEFINED |
| |
| #include "GrGLIRect.h" |
| #include "GrRenderTarget.h" |
| #include "SkScalar.h" |
| |
| class GrGLCaps; |
| class GrGLGpu; |
| class GrGLStencilAttachment; |
| |
| class GrGLRenderTarget : public GrRenderTarget { |
| public: |
| // set fTexFBOID to this value to indicate that it is multisampled but |
| // Gr doesn't know how to resolve it. |
| enum { kUnresolvableFBOID = 0 }; |
| |
| struct IDDesc { |
| GrGLuint fRTFBOID; |
| GrBackendObjectOwnership fRTFBOOwnership; |
| GrGLuint fTexFBOID; |
| GrGLuint fMSColorRenderbufferID; |
| bool fIsMixedSampled; |
| }; |
| |
| static sk_sp<GrGLRenderTarget> MakeWrapped(GrGLGpu*, |
| const GrSurfaceDesc&, |
| const IDDesc&, |
| int stencilBits); |
| |
| void setViewport(const GrGLIRect& rect) { fViewport = rect; } |
| const GrGLIRect& getViewport() const { return fViewport; } |
| |
| // The following two functions return the same ID when a texture/render target is not |
| // multisampled, and different IDs when it is multisampled. |
| // FBO ID used to render into |
| GrGLuint renderFBOID() const { return fRTFBOID; } |
| // FBO ID that has texture ID attached. |
| GrGLuint textureFBOID() const { return fTexFBOID; } |
| |
| // override of GrRenderTarget |
| ResolveType getResolveType() const override { |
| if (GrFSAAType::kUnifiedMSAA != this->fsaaType() || fRTFBOID == fTexFBOID) { |
| // catches FBO 0 and non unified-MSAA case |
| return kAutoResolves_ResolveType; |
| } else if (kUnresolvableFBOID == fTexFBOID) { |
| return kCantResolve_ResolveType; |
| } else { |
| return kCanResolve_ResolveType; |
| } |
| } |
| |
| GrBackendObject getRenderTargetHandle() const override { return fRTFBOID; } |
| |
| bool canAttemptStencilAttachment() const override; |
| |
| // GrGLRenderTarget overrides dumpMemoryStatistics so it can log its texture and renderbuffer |
| // components seperately. |
| void dumpMemoryStatistics(SkTraceMemoryDump* traceMemoryDump) const override; |
| |
| protected: |
| // Constructor for subclasses. |
| GrGLRenderTarget(GrGLGpu*, const GrSurfaceDesc&, const IDDesc&); |
| |
| void init(const GrSurfaceDesc&, const IDDesc&); |
| |
| void onAbandon() override; |
| void onRelease() override; |
| |
| int numSamplesOwnedPerPixel() const { return fNumSamplesOwnedPerPixel; } |
| |
| private: |
| // Constructor for instances wrapping backend objects. |
| GrGLRenderTarget(GrGLGpu*, const GrSurfaceDesc&, const IDDesc&, GrGLStencilAttachment*); |
| |
| static GrRenderTargetFlags ComputeFlags(const GrGLCaps&, const IDDesc&); |
| |
| GrGLGpu* getGLGpu() const; |
| bool completeStencilAttachment() override; |
| |
| size_t onGpuMemorySize() const override; |
| |
| int msaaSamples() const; |
| // The number total number of samples, including both MSAA and resolve texture samples. |
| int totalSamples() const; |
| |
| GrGLuint fRTFBOID; |
| GrGLuint fTexFBOID; |
| GrGLuint fMSColorRenderbufferID; |
| |
| GrBackendObjectOwnership fRTFBOOwnership; |
| |
| // when we switch to this render target we want to set the viewport to |
| // only render to content area (as opposed to the whole allocation) and |
| // we want the rendering to be at top left (GL has origin in bottom left) |
| GrGLIRect fViewport; |
| |
| // The RenderTarget needs to be able to report its VRAM footprint even after abandon and |
| // release have potentially zeroed out the IDs (e.g., so the cache can reset itself). Since |
| // the IDs are just required for the computation in totalSamples we cache that result here. |
| int fNumSamplesOwnedPerPixel; |
| |
| typedef GrRenderTarget INHERITED; |
| }; |
| |
| #endif |