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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 "GrGpuGL.h"
11 
12 #define GPUGL static_cast<GrGpuGL*>(getGpu())
13 
14 #define GL_CALL(X) GR_GL_CALL(GPUGL->glInterface(), X)
15 
init(const Desc & desc,const GrGLIRect & viewport,GrGLTexID * texID)16 void GrGLRenderTarget::init(const Desc& desc,
17                             const GrGLIRect& viewport,
18                             GrGLTexID* texID) {
19     fRTFBOID                = desc.fRTFBOID;
20     fTexFBOID               = desc.fTexFBOID;
21     fMSColorRenderbufferID  = desc.fMSColorRenderbufferID;
22     fViewport               = viewport;
23     fTexIDObj.reset(SkSafeRef(texID));
24     this->registerWithCache();
25 }
26 
27 namespace {
MakeDesc(GrTextureFlags flags,int width,int height,GrPixelConfig config,int sampleCnt,GrSurfaceOrigin origin)28 GrTextureDesc MakeDesc(GrTextureFlags flags,
29                        int width, int height,
30                        GrPixelConfig config, int sampleCnt,
31                        GrSurfaceOrigin origin) {
32     GrTextureDesc temp;
33     temp.fFlags = flags;
34     temp.fWidth = width;
35     temp.fHeight = height;
36     temp.fConfig = config;
37     temp.fSampleCnt = sampleCnt;
38     temp.fOrigin = origin;
39     return temp;
40 }
41 
42 };
43 
GrGLRenderTarget(GrGpuGL * gpu,const Desc & desc,const GrGLIRect & viewport,GrGLTexID * texID,GrGLTexture * texture)44 GrGLRenderTarget::GrGLRenderTarget(GrGpuGL* gpu,
45                                    const Desc& desc,
46                                    const GrGLIRect& viewport,
47                                    GrGLTexID* texID,
48                                    GrGLTexture* texture)
49     : INHERITED(gpu,
50                 desc.fIsWrapped,
51                 texture,
52                 MakeDesc(kNone_GrTextureFlags,
53                          viewport.fWidth, viewport.fHeight,
54                          desc.fConfig, desc.fSampleCnt,
55                          desc.fOrigin)) {
56     SkASSERT(texID);
57     SkASSERT(texture);
58     // FBO 0 can't also be a texture, right?
59     SkASSERT(0 != desc.fRTFBOID);
60     SkASSERT(0 != desc.fTexFBOID);
61 
62     // we assume this is true, TODO: get rid of viewport as a param.
63     SkASSERT(viewport.fWidth == texture->width());
64     SkASSERT(viewport.fHeight == texture->height());
65 
66     this->init(desc, viewport, texID);
67 }
68 
GrGLRenderTarget(GrGpuGL * gpu,const Desc & desc,const GrGLIRect & viewport)69 GrGLRenderTarget::GrGLRenderTarget(GrGpuGL* gpu,
70                                    const Desc& desc,
71                                    const GrGLIRect& viewport)
72     : INHERITED(gpu,
73                 desc.fIsWrapped,
74                 NULL,
75                 MakeDesc(kNone_GrTextureFlags,
76                          viewport.fWidth, viewport.fHeight,
77                          desc.fConfig, desc.fSampleCnt,
78                          desc.fOrigin)) {
79     this->init(desc, viewport, NULL);
80 }
81 
onRelease()82 void GrGLRenderTarget::onRelease() {
83     if (!this->isWrapped()) {
84         if (fTexFBOID) {
85             GL_CALL(DeleteFramebuffers(1, &fTexFBOID));
86         }
87         if (fRTFBOID && fRTFBOID != fTexFBOID) {
88             GL_CALL(DeleteFramebuffers(1, &fRTFBOID));
89         }
90         if (fMSColorRenderbufferID) {
91             GL_CALL(DeleteRenderbuffers(1, &fMSColorRenderbufferID));
92         }
93     }
94     fRTFBOID                = 0;
95     fTexFBOID               = 0;
96     fMSColorRenderbufferID  = 0;
97     fTexIDObj.reset(NULL);
98     INHERITED::onRelease();
99 }
100 
onAbandon()101 void GrGLRenderTarget::onAbandon() {
102     fRTFBOID                = 0;
103     fTexFBOID               = 0;
104     fMSColorRenderbufferID  = 0;
105     if (fTexIDObj.get()) {
106         fTexIDObj->abandon();
107         fTexIDObj.reset(NULL);
108     }
109     INHERITED::onAbandon();
110 }
111