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(const gfx::Size& size) : size_(size) {
  16 }
  17
  18 GLImageIOSurface::~GLImageIOSurface() {
  19   DCHECK(thread_checker_.CalledOnValidThread());
  20   DCHECK(!io_surface_);
  21 }
  22
  23 bool GLImageIOSurface::Initialize(IOSurfaceRef io_surface) {
  24   DCHECK(thread_checker_.CalledOnValidThread());
  25   DCHECK(!io_surface_);
  26   io_surface_.reset(io_surface);
  27   return true;
  28 }
  29
  30 void GLImageIOSurface::Destroy(bool have_context) {
  31   DCHECK(thread_checker_.CalledOnValidThread());
  32   io_surface_.reset();
  33 }
  34
  35 gfx::Size GLImageIOSurface::GetSize() { return size_; }
  36
  37 bool GLImageIOSurface::BindTexImage(unsigned target) {
  38   DCHECK(thread_checker_.CalledOnValidThread());
  39   if (target != GL_TEXTURE_RECTANGLE_ARB) {
  40     // This might be supported in the future. For now, perform strict
  41     // validation so we know what's going on.
  42     LOG(ERROR) << "IOSurface requires TEXTURE_RECTANGLE_ARB target";
  43     return false;
  44   }
  45
  46   CGLContextObj cgl_context =
  47       static_cast<CGLContextObj>(GLContext::GetCurrent()->GetHandle());
  48
  49   DCHECK(io_surface_);
  50   CGLError cgl_error = CGLTexImageIOSurface2D(cgl_context,
  51                                               target,
  52                                               GL_RGBA,
  53                                               size_.width(),
  54                                               size_.height(),
  55                                               GL_BGRA,
  56                                               GL_UNSIGNED_INT_8_8_8_8_REV,
  57                                               io_surface_.get(),
  58                                               0);
  59   if (cgl_error != kCGLNoError) {
  60     LOG(ERROR) << "Error in CGLTexImageIOSurface2D";
  61     return false;
  62   }
  63
  64   return true;
  65 }
  66
  67 bool GLImageIOSurface::CopyTexImage(unsigned target) {
  68   return false;
  69 }
  70
  71 bool GLImageIOSurface::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
  72                                             int z_order,
  73                                             OverlayTransform transform,
  74                                             const Rect& bounds_rect,
  75                                             const RectF& crop_rect) {
  76   return false;
  77 }
  78
  79 }  // namespace gfx