xbmc/cores/VideoPlayer/VideoRenderers/FrameBufferObject.cpp

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "FrameBufferObject.h"
  10
  11 #include "ServiceBroker.h"
  12 #include "rendering/RenderSystem.h"
  13 #include "utils/GLUtils.h"
  14 #include "utils/log.h"
  15
  16 //////////////////////////////////////////////////////////////////////
  17 // CFrameBufferObject
  18 //////////////////////////////////////////////////////////////////////
  19
  20 CFrameBufferObject::CFrameBufferObject()
  21 {
  22   m_valid = false;
  23   m_supported = false;
  24   m_bound = false;
  25 }
  26
  27 bool CFrameBufferObject::IsSupported()
  28 {
  29   if(CServiceBroker::GetRenderSystem()->IsExtSupported("GL_EXT_framebuffer_object"))
  30     m_supported = true;
  31   else
  32     m_supported = false;
  33   return m_supported;
  34 }
  35
  36 bool CFrameBufferObject::Initialize()
  37 {
  38   if (!IsSupported())
  39     return false;
  40
  41   Cleanup();
  42
  43   glGenFramebuffers(1, &m_fbo);
  44   VerifyGLState();
  45
  46   if (!m_fbo)
  47     return false;
  48
  49   m_valid = true;
  50   return true;
  51 }
  52
  53 void CFrameBufferObject::Cleanup()
  54 {
  55   if (!IsValid())
  56     return;
  57
  58   if (m_fbo)
  59     glDeleteFramebuffers(1, &m_fbo);
  60
  61   if (m_texid)
  62     glDeleteTextures(1, &m_texid);
  63
  64   m_texid = 0;
  65   m_fbo = 0;
  66   m_valid = false;
  67   m_bound = false;
  68 }
  69
  70 bool CFrameBufferObject::CreateAndBindToTexture(GLenum target, int width, int height, GLenum format, GLenum type,
  71                                                 GLenum filter, GLenum clampmode)
  72 {
  73   if (!IsValid())
  74     return false;
  75
  76   if (m_texid)
  77     glDeleteTextures(1, &m_texid);
  78
  79   glGenTextures(1, &m_texid);
  80   glBindTexture(target, m_texid);
  81   glTexImage2D(target, 0, format,  width, height, 0, GL_RGBA, type, NULL);
  82   glTexParameteri(target, GL_TEXTURE_WRAP_S, clampmode);
  83   glTexParameteri(target, GL_TEXTURE_WRAP_T, clampmode);
  84   glTexParameteri(target, GL_TEXTURE_MAG_FILTER, filter);
  85   glTexParameteri(target, GL_TEXTURE_MIN_FILTER, filter);
  86   VerifyGLState();
  87
  88   m_bound = false;
  89   glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
  90   glBindTexture(target, m_texid);
  91   glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, target, m_texid, 0);
  92   VerifyGLState();
  93   GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
  94   glBindFramebuffer(GL_FRAMEBUFFER, 0);
  95   if (status != GL_FRAMEBUFFER_COMPLETE)
  96   {
  97     VerifyGLState();
  98     return false;
  99   }
 100   m_bound = true;
 101   return true;
 102 }
 103
 104 void CFrameBufferObject::SetFiltering(GLenum target, GLenum mode)
 105 {
 106   glBindTexture(target, m_texid);
 107   glTexParameteri(target, GL_TEXTURE_MAG_FILTER, mode);
 108   glTexParameteri(target, GL_TEXTURE_MIN_FILTER, mode);
 109 }
 110
 111 // Begin rendering to FBO
 112 bool CFrameBufferObject::BeginRender()
 113 {
 114   if (IsValid() && IsBound())
 115   {
 116     glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
 117     return true;
 118   }
 119   return false;
 120 }
 121
 122 // Finish rendering to FBO
 123 void CFrameBufferObject::EndRender() const
 124 {
 125   if (IsValid())
 126     glBindFramebuffer(GL_FRAMEBUFFER, 0);
 127 }