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      1 //
      2 // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
      3 // Use of this source code is governed by a BSD-style license that can be
      4 // found in the LICENSE file.
      5 //
      6 
      7 // Framebuffer.h: Defines the gl::Framebuffer class. Implements GL framebuffer
      8 // objects and related functionality. [OpenGL ES 2.0.24] section 4.4 page 105.
      9 
     10 #ifndef LIBGLESV2_FRAMEBUFFER_H_
     11 #define LIBGLESV2_FRAMEBUFFER_H_
     12 
     13 #include <vector>
     14 
     15 #include "common/angleutils.h"
     16 #include "common/RefCountObject.h"
     17 #include "constants.h"
     18 
     19 namespace rx
     20 {
     21 class Renderer;
     22 }
     23 
     24 namespace gl
     25 {
     26 class FramebufferAttachment;
     27 class Colorbuffer;
     28 class Depthbuffer;
     29 class Stencilbuffer;
     30 class DepthStencilbuffer;
     31 struct Caps;
     32 
     33 typedef std::vector<FramebufferAttachment *> ColorbufferInfo;
     34 
     35 class Framebuffer
     36 {
     37   public:
     38     Framebuffer(rx::Renderer *renderer, GLuint id);
     39 
     40     virtual ~Framebuffer();
     41 
     42     GLuint id() const { return mId; }
     43 
     44     void setColorbuffer(unsigned int colorAttachment, GLenum type, GLuint colorbuffer, GLint level, GLint layer);
     45     void setDepthbuffer(GLenum type, GLuint depthbuffer, GLint level, GLint layer);
     46     void setStencilbuffer(GLenum type, GLuint stencilbuffer, GLint level, GLint layer);
     47     void setDepthStencilBuffer(GLenum type, GLuint depthStencilBuffer, GLint level, GLint layer);
     48 
     49     void detachTexture(GLuint texture);
     50     void detachRenderbuffer(GLuint renderbuffer);
     51 
     52     FramebufferAttachment *getColorbuffer(unsigned int colorAttachment) const;
     53     FramebufferAttachment *getDepthbuffer() const;
     54     FramebufferAttachment *getStencilbuffer() const;
     55     FramebufferAttachment *getDepthStencilBuffer() const;
     56     FramebufferAttachment *getDepthOrStencilbuffer() const;
     57     FramebufferAttachment *getReadColorbuffer() const;
     58     GLenum getReadColorbufferType() const;
     59     FramebufferAttachment *getFirstColorbuffer() const;
     60 
     61     virtual FramebufferAttachment *getAttachment(GLenum attachment) const;
     62 
     63     GLenum getDrawBufferState(unsigned int colorAttachment) const;
     64     void setDrawBufferState(unsigned int colorAttachment, GLenum drawBuffer);
     65 
     66     bool isEnabledColorAttachment(unsigned int colorAttachment) const;
     67     bool hasEnabledColorAttachment() const;
     68     bool hasStencil() const;
     69     int getSamples() const;
     70     bool usingExtendedDrawBuffers() const;
     71 
     72     virtual GLenum completeness() const;
     73     bool hasValidDepthStencil() const;
     74 
     75     void invalidate(const Caps &caps, GLsizei numAttachments, const GLenum *attachments);
     76     void invalidateSub(const Caps &caps, GLsizei numAttachments, const GLenum *attachments,
     77                        GLint x, GLint y, GLsizei width, GLsizei height);
     78 
     79     // Use this method to retrieve the color buffer map when doing rendering.
     80     // It will apply a workaround for poor shader performance on some systems
     81     // by compacting the list to skip NULL values.
     82     ColorbufferInfo getColorbuffersForRender() const;
     83 
     84   protected:
     85     rx::Renderer *mRenderer;
     86 
     87     GLuint mId;
     88 
     89     FramebufferAttachment *mColorbuffers[IMPLEMENTATION_MAX_DRAW_BUFFERS];
     90     GLenum mDrawBufferStates[IMPLEMENTATION_MAX_DRAW_BUFFERS];
     91     GLenum mReadBufferState;
     92 
     93     FramebufferAttachment *mDepthbuffer;
     94     FramebufferAttachment *mStencilbuffer;
     95 
     96   private:
     97     DISALLOW_COPY_AND_ASSIGN(Framebuffer);
     98 
     99     FramebufferAttachment *createAttachment(GLenum binding, GLenum type, GLuint handle, GLint level, GLint layer) const;
    100 };
    101 
    102 class DefaultFramebuffer : public Framebuffer
    103 {
    104   public:
    105     DefaultFramebuffer(rx::Renderer *Renderer, Colorbuffer *colorbuffer, DepthStencilbuffer *depthStencil);
    106 
    107     virtual GLenum completeness() const;
    108     virtual FramebufferAttachment *getAttachment(GLenum attachment) const;
    109 
    110   private:
    111     DISALLOW_COPY_AND_ASSIGN(DefaultFramebuffer);
    112 };
    113 
    114 }
    115 
    116 namespace rx
    117 {
    118 class RenderTarget;
    119 
    120 // TODO: place this in FramebufferD3D.h
    121 RenderTarget *GetAttachmentRenderTarget(gl::FramebufferAttachment *attachment);
    122 unsigned int GetAttachmentSerial(gl::FramebufferAttachment *attachment);
    123 
    124 }
    125 
    126 #endif   // LIBGLESV2_FRAMEBUFFER_H_
    127