1 /*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "GrGLRenderTarget.h"
9
10 #include "GrGLGpu.h"
11
12 #define GPUGL static_cast<GrGLGpu*>(this->getGpu())
13 #define GL_CALL(X) GR_GL_CALL(GPUGL->glInterface(), X)
14
15 // Because this class is virtually derived from GrSurface we must explicitly call its constructor.
GrGLRenderTarget(GrGLGpu * gpu,const GrSurfaceDesc & desc,const IDDesc & idDesc)16 GrGLRenderTarget::GrGLRenderTarget(GrGLGpu* gpu, const GrSurfaceDesc& desc, const IDDesc& idDesc)
17 : GrSurface(gpu, idDesc.fLifeCycle, desc)
18 , INHERITED(gpu, idDesc.fLifeCycle, desc) {
19 this->init(desc, idDesc);
20 this->registerWithCache();
21 }
22
GrGLRenderTarget(GrGLGpu * gpu,const GrSurfaceDesc & desc,const IDDesc & idDesc,Derived)23 GrGLRenderTarget::GrGLRenderTarget(GrGLGpu* gpu, const GrSurfaceDesc& desc, const IDDesc& idDesc,
24 Derived)
25 : GrSurface(gpu, idDesc.fLifeCycle, desc)
26 , INHERITED(gpu, idDesc.fLifeCycle, desc) {
27 this->init(desc, idDesc);
28 }
29
init(const GrSurfaceDesc & desc,const IDDesc & idDesc)30 void GrGLRenderTarget::init(const GrSurfaceDesc& desc, const IDDesc& idDesc) {
31 fRTFBOID = idDesc.fRTFBOID;
32 fTexFBOID = idDesc.fTexFBOID;
33 fMSColorRenderbufferID = idDesc.fMSColorRenderbufferID;
34 fIsWrapped = kWrapped_LifeCycle == idDesc.fLifeCycle;
35
36 fViewport.fLeft = 0;
37 fViewport.fBottom = 0;
38 fViewport.fWidth = desc.fWidth;
39 fViewport.fHeight = desc.fHeight;
40
41 // We own one color value for each MSAA sample.
42 int colorValuesPerPixel = SkTMax(1, fDesc.fSampleCnt);
43 if (fTexFBOID != fRTFBOID) {
44 // If we own the resolve buffer then that is one more sample per pixel.
45 colorValuesPerPixel += 1;
46 } else if (fTexFBOID != 0) {
47 // For auto-resolving FBOs, the MSAA buffer is free.
48 colorValuesPerPixel = 1;
49 }
50 SkASSERT(kUnknown_GrPixelConfig != fDesc.fConfig);
51 SkASSERT(!GrPixelConfigIsCompressed(fDesc.fConfig));
52 size_t colorBytes = GrBytesPerPixel(fDesc.fConfig);
53 SkASSERT(colorBytes > 0);
54 fGpuMemorySize = colorValuesPerPixel * fDesc.fWidth * fDesc.fHeight * colorBytes;
55 }
56
onGpuMemorySize() const57 size_t GrGLRenderTarget::onGpuMemorySize() const {
58 return fGpuMemorySize;
59 }
60
onRelease()61 void GrGLRenderTarget::onRelease() {
62 if (!fIsWrapped) {
63 if (fTexFBOID) {
64 GL_CALL(DeleteFramebuffers(1, &fTexFBOID));
65 }
66 if (fRTFBOID && fRTFBOID != fTexFBOID) {
67 GL_CALL(DeleteFramebuffers(1, &fRTFBOID));
68 }
69 if (fMSColorRenderbufferID) {
70 GL_CALL(DeleteRenderbuffers(1, &fMSColorRenderbufferID));
71 }
72 }
73 fRTFBOID = 0;
74 fTexFBOID = 0;
75 fMSColorRenderbufferID = 0;
76 fIsWrapped = false;
77 INHERITED::onRelease();
78 }
79
onAbandon()80 void GrGLRenderTarget::onAbandon() {
81 fRTFBOID = 0;
82 fTexFBOID = 0;
83 fMSColorRenderbufferID = 0;
84 fIsWrapped = false;
85 INHERITED::onAbandon();
86 }
87