| // Copyright (c) 2012 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 "base/logging.h" |
| #include "ui/gl/gl_bindings.h" |
| #include "ui/gl/gl_context.h" |
| #include "ui/gl/gl_surface_osmesa.h" |
| |
| namespace gfx { |
| |
| GLSurfaceOSMesa::GLSurfaceOSMesa(unsigned format, const gfx::Size& size) |
| : format_(format), |
| size_(size) { |
| } |
| |
| bool GLSurfaceOSMesa::Initialize() { |
| return Resize(size_); |
| } |
| |
| void GLSurfaceOSMesa::Destroy() { |
| buffer_.reset(); |
| } |
| |
| bool GLSurfaceOSMesa::Resize(const gfx::Size& new_size) { |
| GLContext* current_context = GLContext::GetCurrent(); |
| bool was_current = current_context && current_context->IsCurrent(this); |
| if (was_current) |
| current_context->ReleaseCurrent(this); |
| |
| // Preserve the old buffer. |
| scoped_array<int32> old_buffer(buffer_.release()); |
| |
| // Allocate a new one. |
| buffer_.reset(new int32[new_size.GetArea()]); |
| memset(buffer_.get(), 0, new_size.GetArea() * sizeof(buffer_[0])); |
| |
| // Copy the old back buffer into the new buffer. |
| if (old_buffer.get()) { |
| int copy_width = std::min(size_.width(), new_size.width()); |
| int copy_height = std::min(size_.height(), new_size.height()); |
| for (int y = 0; y < copy_height; ++y) { |
| for (int x = 0; x < copy_width; ++x) { |
| buffer_[y * new_size.width() + x] = old_buffer[y * size_.width() + x]; |
| } |
| } |
| } |
| |
| size_ = new_size; |
| |
| if (was_current) |
| return current_context->MakeCurrent(this); |
| |
| return true; |
| } |
| |
| bool GLSurfaceOSMesa::IsOffscreen() { |
| return true; |
| } |
| |
| bool GLSurfaceOSMesa::SwapBuffers() { |
| NOTREACHED() << "Should not call SwapBuffers on an GLSurfaceOSMesa."; |
| return false; |
| } |
| |
| gfx::Size GLSurfaceOSMesa::GetSize() { |
| return size_; |
| } |
| |
| void* GLSurfaceOSMesa::GetHandle() { |
| return buffer_.get(); |
| } |
| |
| unsigned GLSurfaceOSMesa::GetFormat() { |
| return format_; |
| } |
| |
| GLSurfaceOSMesa::~GLSurfaceOSMesa() { |
| Destroy(); |
| } |
| |
| } // namespace gfx |