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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/gfx/gl/gl_surface_cgl.h"
#include "base/basictypes.h"
#include "base/logging.h"
#include "ui/gfx/gl/gl_bindings.h"
namespace gfx {
namespace {
CGLPixelFormatObj g_pixel_format;
}
GLSurfaceCGL::GLSurfaceCGL() {
}
GLSurfaceCGL::~GLSurfaceCGL() {
}
bool GLSurfaceCGL::InitializeOneOff() {
static bool initialized = false;
if (initialized)
return true;
static const CGLPixelFormatAttribute attribs[] = {
(CGLPixelFormatAttribute) kCGLPFAPBuffer,
(CGLPixelFormatAttribute) 0
};
CGLPixelFormatObj pixel_format;
GLint num_pixel_formats;
if (CGLChoosePixelFormat(attribs,
&g_pixel_format,
&num_pixel_formats) != kCGLNoError) {
LOG(ERROR) << "Error choosing pixel format.";
return false;
}
if (num_pixel_formats == 0) {
LOG(ERROR) << "num_pixel_formats == 0.";
return false;
}
if (!g_pixel_format) {
LOG(ERROR) << "pixel_format == 0.";
return false;
}
initialized = true;
return true;
}
void* GLSurfaceCGL::GetPixelFormat() {
return g_pixel_format;
}
PbufferGLSurfaceCGL::PbufferGLSurfaceCGL(const gfx::Size& size)
: size_(size),
pbuffer_(NULL) {
}
PbufferGLSurfaceCGL::~PbufferGLSurfaceCGL() {
Destroy();
}
bool PbufferGLSurfaceCGL::Initialize() {
if (CGLCreatePBuffer(size_.width(),
size_.height(),
GL_TEXTURE_2D,
GL_RGBA,
0,
reinterpret_cast<CGLPBufferObj*>(&pbuffer_))
!= kCGLNoError) {
LOG(ERROR) << "Error creating pbuffer.";
Destroy();
return false;
}
return true;
}
void PbufferGLSurfaceCGL::Destroy() {
if (pbuffer_) {
CGLDestroyPBuffer(static_cast<CGLPBufferObj>(pbuffer_));
pbuffer_ = NULL;
}
}
bool PbufferGLSurfaceCGL::IsOffscreen() {
return true;
}
bool PbufferGLSurfaceCGL::SwapBuffers() {
NOTREACHED() << "Cannot call SwapBuffers on a PbufferGLSurfaceCGL.";
return false;
}
gfx::Size PbufferGLSurfaceCGL::GetSize() {
return size_;
}
void* PbufferGLSurfaceCGL::GetHandle() {
return pbuffer_;
}
} // namespace gfx
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