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1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //    http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 // Framebuffer.h: Defines the Framebuffer class. Implements GL framebuffer
16 // objects and related functionality. [OpenGL ES 2.0.24] section 4.4 page 105.
17 
18 #ifndef LIBGLESV2_FRAMEBUFFER_H_
19 #define LIBGLESV2_FRAMEBUFFER_H_
20 
21 #include "Context.h"
22 #include "common/Object.hpp"
23 #include "common/Image.hpp"
24 
25 #include <GLES2/gl2.h>
26 
27 namespace es2
28 {
29 class Renderbuffer;
30 class Colorbuffer;
31 class Depthbuffer;
32 class Stencilbuffer;
33 class DepthStencilbuffer;
34 
35 class Framebuffer
36 {
37 public:
38 	Framebuffer();
39 
40 	virtual ~Framebuffer();
41 
42 	void setColorbuffer(GLenum type, GLuint colorbuffer, GLuint index, GLint level = 0, GLint layer = 0);
43 	void setDepthbuffer(GLenum type, GLuint depthbuffer, GLint level = 0, GLint layer = 0);
44 	void setStencilbuffer(GLenum type, GLuint stencilbuffer, GLint level = 0, GLint layer = 0);
45 
46 	void setReadBuffer(GLenum buf);
47 	void setDrawBuffer(GLuint index, GLenum buf);
48 	GLenum getReadBuffer() const;
49 	GLenum getDrawBuffer(GLuint index) const;
50 
51 	void detachTexture(GLuint texture);
52 	void detachRenderbuffer(GLuint renderbuffer);
53 
54 	egl::Image *getRenderTarget(GLuint index);
55 	egl::Image *getReadRenderTarget();
56 	egl::Image *getDepthBuffer();
57 	egl::Image *getStencilBuffer();
58 
59 	Renderbuffer *getColorbuffer(GLuint index) const;
60 	Renderbuffer *getReadColorbuffer() const;
61 	Renderbuffer *getDepthbuffer() const;
62 	Renderbuffer *getStencilbuffer() const;
63 
64 	GLenum getReadBufferType();
65 	GLenum getColorbufferType(GLuint index);
66 	GLenum getDepthbufferType();
67 	GLenum getStencilbufferType();
68 
69 	GLuint getColorbufferName(GLuint index);
70 	GLuint getDepthbufferName();
71 	GLuint getStencilbufferName();
72 
73 	GLint getColorbufferLayer(GLuint index);
74 	GLint getDepthbufferLayer();
75 	GLint getStencilbufferLayer();
76 
77 	bool hasStencil();
78 
79 	GLenum completeness();
80 	GLenum completeness(int &width, int &height, int &samples);
81 
82 	GLenum getImplementationColorReadFormat() const;
83 	GLenum getImplementationColorReadType() const;
84 	GLenum getDepthReadFormat() const;
85 	GLenum getDepthReadType() const;
86 
isDefaultFramebuffer()87 	virtual bool isDefaultFramebuffer() const { return false; }
88 
89 	static bool IsRenderbuffer(GLenum type);
90 
91 protected:
92 	GLuint getReadBufferIndex() const;
93 
94 	GLenum readBuffer;
95 	GLenum drawBuffer[MAX_COLOR_ATTACHMENTS];
96 
97 	GLenum mColorbufferType[MAX_COLOR_ATTACHMENTS];
98 	gl::BindingPointer<Renderbuffer> mColorbufferPointer[MAX_COLOR_ATTACHMENTS];
99 	GLint mColorbufferLayer[MAX_COLOR_ATTACHMENTS];
100 
101 	GLenum mDepthbufferType;
102 	gl::BindingPointer<Renderbuffer> mDepthbufferPointer;
103 	GLint mDepthbufferLayer;
104 
105 	GLenum mStencilbufferType;
106 	gl::BindingPointer<Renderbuffer> mStencilbufferPointer;
107 	GLint mStencilbufferLayer;
108 
109 private:
110 	Renderbuffer *lookupRenderbuffer(GLenum type, GLuint handle, GLint level) const;
111 };
112 
113 class DefaultFramebuffer : public Framebuffer
114 {
115 public:
116 	DefaultFramebuffer();
117 	DefaultFramebuffer(Colorbuffer *colorbuffer, DepthStencilbuffer *depthStencil);
118 
isDefaultFramebuffer()119 	bool isDefaultFramebuffer() const override { return true; }
120 };
121 
122 }
123 
124 #endif   // LIBGLESV2_FRAMEBUFFER_H_
125