git.sesse.net Git - casparcg/blob - accelerator/ogl/util/texture.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "../../StdAfx.h"
  23
  24 #include "texture.h"
  25
  26 #include "buffer.h"
  27
  28 #include <common/except.h>
  29 #include <common/gl/gl_check.h>
  30
  31 #include <GL/glew.h>
  32
  33 #include <tbb/atomic.h>
  34
  35 #include <boost/thread/future.hpp>
  36
  37 namespace caspar { namespace accelerator { namespace ogl {
  38
  39 static GLenum FORMAT[] = {0, GL_RED, GL_RG, GL_BGR, GL_BGRA};
  40 static GLenum INTERNAL_FORMAT[] = {0, GL_R8, GL_RG8, GL_RGB8, GL_RGBA8};
  41 static GLenum TYPE[]                    = { 0, GL_UNSIGNED_BYTE, GL_UNSIGNED_BYTE, GL_UNSIGNED_BYTE, GL_UNSIGNED_BYTE };
  42 static GLenum READPIXELS_TYPE[] = { 0, GL_UNSIGNED_BYTE, GL_UNSIGNED_BYTE, GL_UNSIGNED_BYTE, GL_UNSIGNED_INT_8_8_8_8_REV };
  43
  44 static tbb::atomic<int>                 g_total_count;
  45 static tbb::atomic<std::size_t> g_total_size;
  46
  47 struct texture::impl : boost::noncopyable
  48 {
  49         GLuint  id_;
  50
  51         const int       width_;
  52         const int       height_;
  53         const int       stride_;
  54         const bool      mipmapped_;
  55 public:
  56         impl(int width, int height, int stride, bool mipmapped)
  57                 : width_(width)
  58                 , height_(height)
  59                 , stride_(stride)
  60                 , mipmapped_(mipmapped)
  61         {
  62                 GL(glGenTextures(1, &id_));
  63                 GL(glBindTexture(GL_TEXTURE_2D, id_));
  64                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, (mipmapped ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR)));
  65                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
  66                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE));
  67                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE));
  68                 GL(glTexImage2D(GL_TEXTURE_2D, 0, INTERNAL_FORMAT[stride_], width_, height_, 0, FORMAT[stride_], TYPE[stride_], NULL));
  69
  70                 if (mipmapped)
  71                 {
  72                         enable_anosotropic_filtering_if_available();
  73                         GL(glGenerateMipmap(GL_TEXTURE_2D));
  74                 }
  75
  76                 GL(glBindTexture(GL_TEXTURE_2D, 0));
  77                 g_total_count++;
  78                 g_total_size += static_cast<std::size_t>(width * height * stride * (mipmapped ? 1.33 : 1.0));
  79                 //CASPAR_LOG(trace) << "[texture] [" << ++g_total_count << L"] allocated size:" << width*height*stride;
  80         }
  81
  82         void enable_anosotropic_filtering_if_available()
  83         {
  84                 static auto AVAILABLE = glewIsSupported("GL_EXT_texture_filter_anisotropic");
  85
  86                 if (!AVAILABLE)
  87                         return;
  88
  89                 static GLfloat MAX_ANISOTROPY = []() -> GLfloat
  90                 {
  91                         GLfloat anisotropy;
  92                         glGetFloatv(GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &anisotropy);
  93                         return anisotropy;
  94                 }();
  95
  96                 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, MAX_ANISOTROPY);
  97         }
  98
  99         ~impl()
 100         {
 101                 glDeleteTextures(1, &id_);
 102                 g_total_size -= static_cast<std::size_t>(width_ * height_ * stride_ * (mipmapped_ ? 1.33 : 1.0));
 103                 g_total_count--;
 104         }
 105
 106         void bind()
 107         {
 108                 GL(glBindTexture(GL_TEXTURE_2D, id_));
 109         }
 110
 111         void bind(int index)
 112         {
 113                 GL(glActiveTexture(GL_TEXTURE0+index));
 114                 bind();
 115         }
 116
 117         void unbind()
 118         {
 119                 GL(glBindTexture(GL_TEXTURE_2D, 0));
 120         }
 121
 122         void attach()
 123         {
 124                 GL(glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + 0, GL_TEXTURE_2D, id_, 0));
 125         }
 126
 127         void clear()
 128         {
 129                 attach();
 130                 GL(glClear(GL_COLOR_BUFFER_BIT));
 131         }
 132
 133         void copy_from(buffer& source)
 134         {
 135                 source.unmap();
 136                 source.bind();
 137                 GL(glBindTexture(GL_TEXTURE_2D, id_));
 138                 GL(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width_, height_, FORMAT[stride_], TYPE[stride_], NULL));
 139
 140                 if (mipmapped_)
 141                         GL(glGenerateMipmap(GL_TEXTURE_2D));
 142
 143                 GL(glBindTexture(GL_TEXTURE_2D, 0));
 144                 source.unbind();
 145                 source.map(); // Just map it back since map will orphan buffer.
 146         }
 147
 148         void copy_to(buffer& dest)
 149         {
 150                 dest.unmap();
 151                 dest.bind();
 152                 GL(glBindTexture(GL_TEXTURE_2D, id_));
 153                 GL(glReadBuffer(GL_COLOR_ATTACHMENT0));
 154                 GL(glReadPixels(0, 0, width_, height_, FORMAT[stride_], READPIXELS_TYPE[stride_], NULL));
 155                 GL(glBindTexture(GL_TEXTURE_2D, 0));
 156                 dest.unbind();
 157                 GL(glFlush());
 158         }
 159 };
 160
 161 texture::texture(int width, int height, int stride, bool mipmapped) : impl_(new impl(width, height, stride, mipmapped)){}
 162 texture::texture(texture&& other) : impl_(std::move(other.impl_)){}
 163 texture::~texture(){}
 164 texture& texture::operator=(texture&& other){impl_ = std::move(other.impl_); return *this;}
 165 void texture::bind(int index){impl_->bind(index);}
 166 void texture::unbind(){impl_->unbind();}
 167 void texture::attach(){impl_->attach();}
 168 void texture::clear(){impl_->clear();}
 169 void texture::copy_from(buffer& source){impl_->copy_from(source);}
 170 void texture::copy_to(buffer& dest){impl_->copy_to(dest);}
 171 int texture::width() const { return impl_->width_; }
 172 int texture::height() const { return impl_->height_; }
 173 int texture::stride() const { return impl_->stride_; }
 174 bool texture::mipmapped() const { return impl_->mipmapped_; }
 175 std::size_t texture::size() const { return static_cast<std::size_t>(impl_->width_*impl_->height_*impl_->stride_); }
 176 int texture::id() const{ return impl_->id_;}
 177
 178 boost::property_tree::wptree texture::info()
 179 {
 180         boost::property_tree::wptree info;
 181
 182         info.add(L"total_count", g_total_count);
 183         info.add(L"total_size", g_total_size);
 184
 185         return info;
 186 }
 187
 188 }}}