| /* |
| * 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 GrGLGpu; |
| |
| 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; |
| GrGLuint fTexFBOID; |
| GrGLuint fMSColorRenderbufferID; |
| GrGpuResource::LifeCycle fLifeCycle; |
| }; |
| |
| GrGLRenderTarget(GrGLGpu*, const GrSurfaceDesc&, const IDDesc&); |
| |
| 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 multisampled, and different IDs when |
| // it is. |
| // 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 |
| GrBackendObject getRenderTargetHandle() const SK_OVERRIDE { return this->renderFBOID(); } |
| GrBackendObject getRenderTargetResolvedHandle() const SK_OVERRIDE { return this->textureFBOID(); } |
| ResolveType getResolveType() const SK_OVERRIDE { |
| if (!this->isMultisampled() || |
| fRTFBOID == fTexFBOID) { |
| // catches FBO 0 and non MSAA case |
| return kAutoResolves_ResolveType; |
| } else if (kUnresolvableFBOID == fTexFBOID) { |
| return kCantResolve_ResolveType; |
| } else { |
| return kCanResolve_ResolveType; |
| } |
| } |
| |
| protected: |
| // The public constructor registers this object with the cache. However, only the most derived |
| // class should register with the cache. This constructor does not do the registration and |
| // rather moves that burden onto the derived class. |
| enum Derived { kDerived }; |
| GrGLRenderTarget(GrGLGpu*, const GrSurfaceDesc&, const IDDesc&, Derived); |
| |
| void init(const GrSurfaceDesc&, const IDDesc&); |
| |
| void onAbandon() SK_OVERRIDE; |
| void onRelease() SK_OVERRIDE; |
| |
| // In protected because subclass GrGLTextureRenderTarget calls this version. |
| size_t onGpuMemorySize() const SK_OVERRIDE; |
| |
| private: |
| GrGLuint fRTFBOID; |
| GrGLuint fTexFBOID; |
| GrGLuint fMSColorRenderbufferID; |
| |
| // We track this separately from GrGpuResource because this may be both a texture and a render |
| // target, and the texture may be wrapped while the render target is not. |
| bool fIsWrapped; |
| |
| // 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; |
| |
| // onGpuMemorySize() needs to know what how many color values are owned per pixel. However, |
| // abandon and release zero out the IDs and the cache needs to know the size even after those |
| // actions. |
| uint8_t fColorValuesPerPixel; |
| |
| typedef GrRenderTarget INHERITED; |
| }; |
| |
| #endif |