ui/gl/gl_image_io_surface.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gl/gl_image_io_surface.h"
   6
   7 #include "ui/gl/gl_bindings.h"
   8 #include "ui/gl/gl_context.h"
   9
  10 // Note that this must be included after gl_bindings.h to avoid conflicts.
  11 #include <OpenGL/CGLIOSurface.h>
  12
  13 namespace gfx {
  14
  15 GLImageIOSurface::GLImageIOSurface(gfx::Size size)
  16     : size_(size) {}
  17
  18 GLImageIOSurface::~GLImageIOSurface() { Destroy(); }
  19
  20 bool GLImageIOSurface::Initialize(gfx::GpuMemoryBufferHandle buffer) {
  21   io_surface_.reset(IOSurfaceLookup(buffer.io_surface_id));
  22   if (!io_surface_) {
  23     LOG(ERROR) << "IOSurface lookup failed";
  24     return false;
  25   }
  26
  27   return true;
  28 }
  29
  30 gfx::Size GLImageIOSurface::GetSize() { return size_; }
  31
  32 bool GLImageIOSurface::BindTexImage(unsigned target) {
  33   if (target != GL_TEXTURE_RECTANGLE_ARB) {
  34     // This might be supported in the future. For now, perform strict
  35     // validation so we know what's going on.
  36     LOG(ERROR) << "IOSurface requires TEXTURE_RECTANGLE_ARB target";
  37     return false;
  38   }
  39
  40   CGLContextObj cgl_context =
  41       static_cast<CGLContextObj>(GLContext::GetCurrent()->GetHandle());
  42
  43   DCHECK(io_surface_);
  44   CGLError cgl_error = CGLTexImageIOSurface2D(cgl_context,
  45                                               target,
  46                                               GL_RGBA,
  47                                               size_.width(),
  48                                               size_.height(),
  49                                               GL_BGRA,
  50                                               GL_UNSIGNED_INT_8_8_8_8_REV,
  51                                               io_surface_.get(),
  52                                               0);
  53   if (cgl_error != kCGLNoError) {
  54     LOG(ERROR) << "Error in CGLTexImageIOSurface2D";
  55     return false;
  56   }
  57
  58   return true;
  59 }
  60
  61 }  // namespace gfx