1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/gpu/gl/GrGLRenderTarget.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,107 @@
1.4 +/*
1.5 + * Copyright 2011 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +
1.12 +#ifndef GrGLRenderTarget_DEFINED
1.13 +#define GrGLRenderTarget_DEFINED
1.14 +
1.15 +#include "GrGLIRect.h"
1.16 +#include "GrRenderTarget.h"
1.17 +#include "SkScalar.h"
1.18 +
1.19 +class GrGpuGL;
1.20 +class GrGLTexture;
1.21 +class GrGLTexID;
1.22 +
1.23 +class GrGLRenderTarget : public GrRenderTarget {
1.24 +
1.25 +public:
1.26 + // set fTexFBOID to this value to indicate that it is multisampled but
1.27 + // Gr doesn't know how to resolve it.
1.28 + enum { kUnresolvableFBOID = 0 };
1.29 +
1.30 + struct Desc {
1.31 + GrGLuint fRTFBOID;
1.32 + GrGLuint fTexFBOID;
1.33 + GrGLuint fMSColorRenderbufferID;
1.34 + bool fIsWrapped;
1.35 + GrPixelConfig fConfig;
1.36 + int fSampleCnt;
1.37 + GrSurfaceOrigin fOrigin;
1.38 + bool fCheckAllocation;
1.39 + };
1.40 +
1.41 + // creates a GrGLRenderTarget associated with a texture
1.42 + GrGLRenderTarget(GrGpuGL* gpu,
1.43 + const Desc& desc,
1.44 + const GrGLIRect& viewport,
1.45 + GrGLTexID* texID,
1.46 + GrGLTexture* texture);
1.47 +
1.48 + // creates an independent GrGLRenderTarget
1.49 + GrGLRenderTarget(GrGpuGL* gpu,
1.50 + const Desc& desc,
1.51 + const GrGLIRect& viewport);
1.52 +
1.53 + virtual ~GrGLRenderTarget() { this->release(); }
1.54 +
1.55 + void setViewport(const GrGLIRect& rect) { fViewport = rect; }
1.56 + const GrGLIRect& getViewport() const { return fViewport; }
1.57 +
1.58 + // The following two functions return the same ID when a
1.59 + // texture/render target is multisampled, and different IDs when
1.60 + // it is.
1.61 + // FBO ID used to render into
1.62 + GrGLuint renderFBOID() const { return fRTFBOID; }
1.63 + // FBO ID that has texture ID attached.
1.64 + GrGLuint textureFBOID() const { return fTexFBOID; }
1.65 +
1.66 + // override of GrRenderTarget
1.67 + virtual GrBackendObject getRenderTargetHandle() const {
1.68 + return this->renderFBOID();
1.69 + }
1.70 + virtual GrBackendObject getRenderTargetResolvedHandle() const {
1.71 + return this->textureFBOID();
1.72 + }
1.73 + virtual ResolveType getResolveType() const {
1.74 +
1.75 + if (!this->isMultisampled() ||
1.76 + fRTFBOID == fTexFBOID) {
1.77 + // catches FBO 0 and non MSAA case
1.78 + return kAutoResolves_ResolveType;
1.79 + } else if (kUnresolvableFBOID == fTexFBOID) {
1.80 + return kCantResolve_ResolveType;
1.81 + } else {
1.82 + return kCanResolve_ResolveType;
1.83 + }
1.84 + }
1.85 +
1.86 +protected:
1.87 + // override of GrResource
1.88 + virtual void onAbandon() SK_OVERRIDE;
1.89 + virtual void onRelease() SK_OVERRIDE;
1.90 +
1.91 +private:
1.92 + GrGLuint fRTFBOID;
1.93 + GrGLuint fTexFBOID;
1.94 +
1.95 + GrGLuint fMSColorRenderbufferID;
1.96 +
1.97 + // when we switch to this render target we want to set the viewport to
1.98 + // only render to to content area (as opposed to the whole allocation) and
1.99 + // we want the rendering to be at top left (GL has origin in bottom left)
1.100 + GrGLIRect fViewport;
1.101 +
1.102 + // non-NULL if this RT was created by Gr with an associated GrGLTexture.
1.103 + SkAutoTUnref<GrGLTexID> fTexIDObj;
1.104 +
1.105 + void init(const Desc& desc, const GrGLIRect& viewport, GrGLTexID* texID);
1.106 +
1.107 + typedef GrRenderTarget INHERITED;
1.108 +};
1.109 +
1.110 +#endif
