Mac Overlays: Wire up overlays on Mac

ui/gl/gl_image_io_surface.cc

-// Copyright 2013 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/gl/gl_image_io_surface.h"
-
-#include "ui/gl/gl_bindings.h"
-#include "ui/gl/gl_context.h"
-
-// Note that this must be included after gl_bindings.h to avoid conflicts.
-#include <OpenGL/CGLIOSurface.h>
-
-namespace gfx {
-namespace {
-
-bool ValidInternalFormat(unsigned internalformat) {
-  switch (internalformat) {
-    case GL_R8:
-    case GL_BGRA_EXT:
-      return true;
-    default:
-      return false;
-  }
-}
-
-bool ValidFormat(GpuMemoryBuffer::Format format) {
-  switch (format) {
-    case GpuMemoryBuffer::R_8:
-    case GpuMemoryBuffer::BGRA_8888:
-      return true;
-    case GpuMemoryBuffer::ATC:
-    case GpuMemoryBuffer::ATCIA:
-    case GpuMemoryBuffer::DXT1:
-    case GpuMemoryBuffer::DXT5:
-    case GpuMemoryBuffer::ETC1:
-    case GpuMemoryBuffer::RGBA_4444:
-    case GpuMemoryBuffer::RGBA_8888:
-    case GpuMemoryBuffer::RGBX_8888:
-    case GpuMemoryBuffer::YUV_420:
-      return false;
-  }
-
-  NOTREACHED();
-  return false;
-}
-
-GLenum TextureFormat(GpuMemoryBuffer::Format format) {
-  switch (format) {
-    case GpuMemoryBuffer::R_8:
-      return GL_RED;
-    case GpuMemoryBuffer::BGRA_8888:
-      return GL_RGBA;
-    case GpuMemoryBuffer::ATC:
-    case GpuMemoryBuffer::ATCIA:
-    case GpuMemoryBuffer::DXT1:
-    case GpuMemoryBuffer::DXT5:
-    case GpuMemoryBuffer::ETC1:
-    case GpuMemoryBuffer::RGBA_4444:
-    case GpuMemoryBuffer::RGBA_8888:
-    case GpuMemoryBuffer::RGBX_8888:
-    case GpuMemoryBuffer::YUV_420:
-      NOTREACHED();
-      return 0;
-  }
-
-  NOTREACHED();
-  return 0;
-}
-
-GLenum DataFormat(GpuMemoryBuffer::Format format) {
-  switch (format) {
-    case GpuMemoryBuffer::R_8:
-      return GL_RED;
-    case GpuMemoryBuffer::BGRA_8888:
-      return GL_BGRA;
-    case GpuMemoryBuffer::ATC:
-    case GpuMemoryBuffer::ATCIA:
-    case GpuMemoryBuffer::DXT1:
-    case GpuMemoryBuffer::DXT5:
-    case GpuMemoryBuffer::ETC1:
-    case GpuMemoryBuffer::RGBA_4444:
-    case GpuMemoryBuffer::RGBA_8888:
-    case GpuMemoryBuffer::RGBX_8888:
-    case GpuMemoryBuffer::YUV_420:
-      NOTREACHED();
-      return 0;
-  }
-
-  NOTREACHED();
-  return 0;
-}
-
-GLenum DataType(GpuMemoryBuffer::Format format) {
-  switch (format) {
-    case GpuMemoryBuffer::R_8:
-      return GL_UNSIGNED_BYTE;
-    case GpuMemoryBuffer::BGRA_8888:
-      return GL_UNSIGNED_INT_8_8_8_8_REV;
-    case GpuMemoryBuffer::ATC:
-    case GpuMemoryBuffer::ATCIA:
-    case GpuMemoryBuffer::DXT1:
-    case GpuMemoryBuffer::DXT5:
-    case GpuMemoryBuffer::ETC1:
-    case GpuMemoryBuffer::RGBA_4444:
-    case GpuMemoryBuffer::RGBA_8888:
-    case GpuMemoryBuffer::RGBX_8888:
-    case GpuMemoryBuffer::YUV_420:
-      NOTREACHED();
-      return 0;
-  }
-
-  NOTREACHED();
-  return 0;
-}
-
-}  // namespace
-
-GLImageIOSurface::GLImageIOSurface(const gfx::Size& size,
-                                   unsigned internalformat)
-    : size_(size),
-      internalformat_(internalformat),
-      format_(GpuMemoryBuffer::RGBA_8888) {
-}
-
-GLImageIOSurface::~GLImageIOSurface() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(!io_surface_);
-}
-
-bool GLImageIOSurface::Initialize(IOSurfaceRef io_surface,
-                                  GpuMemoryBuffer::Format format) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(!io_surface_);
-
-  if (!ValidInternalFormat(internalformat_)) {
-    LOG(ERROR) << "Invalid internalformat: " << internalformat_;
-    return false;
-  }
-
-  if (!ValidFormat(format)) {
-    LOG(ERROR) << "Invalid format: " << format;
-    return false;
-  }
-
-  format_ = format;
-  io_surface_.reset(io_surface, base::scoped_policy::RETAIN);
-  return true;
-}
-
-void GLImageIOSurface::Destroy(bool have_context) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  io_surface_.reset();
-}
-
-gfx::Size GLImageIOSurface::GetSize() { return size_; }
-
-unsigned GLImageIOSurface::GetInternalFormat() { return internalformat_; }
-
-bool GLImageIOSurface::BindTexImage(unsigned target) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (target != GL_TEXTURE_RECTANGLE_ARB) {
-    // This might be supported in the future. For now, perform strict
-    // validation so we know what's going on.
-    LOG(ERROR) << "IOSurface requires TEXTURE_RECTANGLE_ARB target";
-    return false;
-  }
-
-  CGLContextObj cgl_context =
-      static_cast<CGLContextObj>(GLContext::GetCurrent()->GetHandle());
-
-  DCHECK(io_surface_);
-  CGLError cgl_error =
-      CGLTexImageIOSurface2D(cgl_context, target, TextureFormat(format_),
-                             size_.width(), size_.height(), DataFormat(format_),
-                             DataType(format_), io_surface_.get(), 0);
-  if (cgl_error != kCGLNoError) {
-    LOG(ERROR) << "Error in CGLTexImageIOSurface2D";
-    return false;
-  }
-
-  return true;
-}
-
-bool GLImageIOSurface::CopyTexSubImage(unsigned target,
-                                       const Point& offset,
-                                       const Rect& rect) {
-  return false;
-}
-
-bool GLImageIOSurface::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
-                                            int z_order,
-                                            OverlayTransform transform,
-                                            const Rect& bounds_rect,
-                                            const RectF& crop_rect) {
-  return false;
-}
-
-}  // namespace gfx