bsalomon@google.com | aa5b673 | 2011-07-29 15:13:20 +0000 | [diff] [blame^] | 1 | |
| 2 | /* |
| 3 | * Copyright 2011 Google Inc. |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
| 9 | |
| 10 | #ifndef GrGLRenderTarget_DEFINED |
| 11 | #define GrGLRenderTarget_DEFINED |
| 12 | |
| 13 | #include "GrGLIRect.h" |
| 14 | #include "GrRenderTarget.h" |
| 15 | #include "GrScalar.h" |
| 16 | |
| 17 | class GrGpuGL; |
| 18 | class GrGLTexture; |
| 19 | class GrGLTexID; |
| 20 | |
| 21 | class GrGLRenderTarget : public GrRenderTarget { |
| 22 | |
| 23 | public: |
| 24 | // set fTexFBOID to this value to indicate that it is multisampled but |
| 25 | // Gr doesn't know how to resolve it. |
| 26 | enum { kUnresolvableFBOID = 0 }; |
| 27 | |
| 28 | struct GLRenderTargetIDs { |
| 29 | GrGLuint fRTFBOID; |
| 30 | GrGLuint fTexFBOID; |
| 31 | GrGLuint fStencilRenderbufferID; |
| 32 | GrGLuint fMSColorRenderbufferID; |
| 33 | bool fOwnIDs; |
| 34 | void reset() { memset(this, 0, sizeof(GLRenderTargetIDs)); } |
| 35 | }; |
| 36 | |
| 37 | GrGLRenderTarget(GrGpuGL* gpu, |
| 38 | const GLRenderTargetIDs& ids, |
| 39 | GrGLTexID* texID, |
| 40 | GrPixelConfig config, |
| 41 | GrGLuint stencilBits, |
| 42 | bool isMultisampled, |
| 43 | const GrGLIRect& fViewport, |
| 44 | GrGLTexture* texture); |
| 45 | |
| 46 | virtual ~GrGLRenderTarget() { this->release(); } |
| 47 | |
| 48 | void setViewport(const GrGLIRect& rect) { fViewport = rect; } |
| 49 | const GrGLIRect& getViewport() const { return fViewport; } |
| 50 | |
| 51 | // The following two functions return the same ID when a |
| 52 | // texture-rendertarget is multisampled, and different IDs when |
| 53 | // it is. |
| 54 | // FBO ID used to render into |
| 55 | GrGLuint renderFBOID() const { return fRTFBOID; } |
| 56 | // FBO ID that has texture ID attached. |
| 57 | GrGLuint textureFBOID() const { return fTexFBOID; } |
| 58 | |
| 59 | // override of GrRenderTarget |
| 60 | virtual intptr_t getRenderTargetHandle() const { |
| 61 | return this->renderFBOID(); |
| 62 | } |
| 63 | virtual intptr_t getRenderTargetResolvedHandle() const { |
| 64 | return this->textureFBOID(); |
| 65 | } |
| 66 | virtual ResolveType getResolveType() const { |
| 67 | if (fRTFBOID == fTexFBOID) { |
| 68 | // catches FBO 0 and non MSAA case |
| 69 | return kAutoResolves_ResolveType; |
| 70 | } else if (kUnresolvableFBOID == fTexFBOID) { |
| 71 | return kCantResolve_ResolveType; |
| 72 | } else { |
| 73 | return kCanResolve_ResolveType; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | protected: |
| 78 | // override of GrResource |
| 79 | virtual void onAbandon(); |
| 80 | virtual void onRelease(); |
| 81 | |
| 82 | private: |
| 83 | GrGLuint fRTFBOID; |
| 84 | GrGLuint fTexFBOID; |
| 85 | GrGLuint fStencilRenderbufferID; |
| 86 | GrGLuint fMSColorRenderbufferID; |
| 87 | |
| 88 | // Should this object delete IDs when it is destroyed or does someone |
| 89 | // else own them. |
| 90 | bool fOwnIDs; |
| 91 | |
| 92 | // when we switch to this rendertarget we want to set the viewport to |
| 93 | // only render to to content area (as opposed to the whole allocation) and |
| 94 | // we want the rendering to be at top left (GL has origin in bottom left) |
| 95 | GrGLIRect fViewport; |
| 96 | |
| 97 | // non-NULL if this RT was created by Gr with an associated GrGLTexture. |
| 98 | GrGLTexID* fTexIDObj; |
| 99 | |
| 100 | typedef GrRenderTarget INHERITED; |
| 101 | }; |
| 102 | |
| 103 | #endif |