Move PlatformCanvas and PlatformDevice from base/gfx to webkit/port. I left h...

base/gfx/bitmap_platform_device_mac.cc

Index: base/gfx/bitmap_platform_device_mac.cc
===================================================================
--- base/gfx/bitmap_platform_device_mac.cc	(revision 5678)
+++ base/gfx/bitmap_platform_device_mac.cc	(working copy)
@@ -1,289 +0,0 @@
-// Copyright (c) 2006-2008 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 <time.h>
-
-#include "SkMatrix.h"
-#include "SkRegion.h"
-#include "SkUtils.h"
-
-#include "base/gfx/bitmap_platform_device_mac.h"
-#include "base/gfx/skia_utils_mac.h"
-#include "base/logging.h"
-
-namespace gfx {
-
-namespace {
-
-// Constrains position and size to fit within available_size. If |size| is -1,
-// all the |available_size| is used. Returns false if the position is out of
-// |available_size|.
-bool Constrain(int available_size, int* position, int *size) {
-  if (*size < -2)
-    return false;
-  
-  if (*position < 0) {
-    if (*size != -1)
-      *size += *position;
-    *position = 0;
-  }
-  if (*size == 0 || *position >= available_size)
-    return false;
-  
-  if (*size > 0) {
-    int overflow = (*position + *size) - available_size;
-    if (overflow > 0) {
-      *size -= overflow;
-    }
-  } else {
-    // Fill up available size.
-    *size = available_size - *position;
-  }
-  return true;
-}
-
-} // namespace
-
-class BitmapPlatformDeviceMac::BitmapPlatformDeviceMacData
-    : public base::RefCounted<BitmapPlatformDeviceMacData> {
- public:
-  explicit BitmapPlatformDeviceMacData(CGContextRef bitmap);
-
-  // Create/destroy CoreGraphics context for our bitmap data.
-  CGContextRef GetBitmapContext() {
-    LoadConfig();
-    return bitmap_context_;
-  }
-
-  void ReleaseBitmapContext() {
-    DCHECK(bitmap_context_);
-    CGContextRelease(bitmap_context_);
-    bitmap_context_ = NULL;
-  }
-
-  // Sets the transform and clip operations. This will not update the CGContext,
-  // but will mark the config as dirty. The next call of LoadConfig will
-  // pick up these changes.
-  void SetMatrixClip(const SkMatrix& transform, const SkRegion& region);
-
-  // Loads the current transform and clip into the DC. Can be called even when
-  // |bitmap_context_| is NULL (will be a NOP).
-  void LoadConfig();
-
-  // Lazily-created graphics context used to draw into the bitmap.
-  CGContextRef bitmap_context_;
-
-  // True when there is a transform or clip that has not been set to the
-  // CGContext.  The CGContext is retrieved for every text operation, and the
-  // transform and clip do not change as much. We can save time by not loading
-  // the clip and transform for every one.
-  bool config_dirty_;
-
-  // Translation assigned to the CGContext: we need to keep track of this
-  // separately so it can be updated even if the CGContext isn't created yet.
-  SkMatrix transform_;
-
-  // The current clipping
-  SkRegion clip_region_;
-
- private:
-  friend class base::RefCounted<BitmapPlatformDeviceMacData>;
-  ~BitmapPlatformDeviceMacData() {
-    if (bitmap_context_)
-      CGContextRelease(bitmap_context_);
-  }
-
-  DISALLOW_COPY_AND_ASSIGN(BitmapPlatformDeviceMacData);
-};
-
-BitmapPlatformDeviceMac::\
-    BitmapPlatformDeviceMacData::BitmapPlatformDeviceMacData(
-    CGContextRef bitmap)
-    : bitmap_context_(bitmap),
-      config_dirty_(true) {  // Want to load the config next time.
-  DCHECK(bitmap_context_);
-  // Initialize the clip region to the entire bitmap.  
-  
-  SkIRect rect;
-  rect.set(0, 0,
-           CGBitmapContextGetWidth(bitmap_context_),
-           CGBitmapContextGetHeight(bitmap_context_));
-  clip_region_ = SkRegion(rect);
-  transform_.reset();
-  CGContextRetain(bitmap_context_);
-}
-
-void BitmapPlatformDeviceMac::BitmapPlatformDeviceMacData::SetMatrixClip(
-    const SkMatrix& transform,
-    const SkRegion& region) {
-  transform_ = transform;
-  clip_region_ = region;
-  config_dirty_ = true;
-}
-
-void BitmapPlatformDeviceMac::BitmapPlatformDeviceMacData::LoadConfig() {
-  if (!config_dirty_ || !bitmap_context_)
-    return;  // Nothing to do.
-  config_dirty_ = false;
-
-  // Transform.
-  SkMatrix t(transform_);
-  LoadTransformToCGContext(bitmap_context_, t);
-  t.setTranslateX(-t.getTranslateX());
-  t.setTranslateY(-t.getTranslateY());
-  LoadClippingRegionToCGContext(bitmap_context_, clip_region_, t);
-}
-
-
-// We use this static factory function instead of the regular constructor so
-// that we can create the pixel data before calling the constructor. This is
-// required so that we can call the base class' constructor with the pixel
-// data.
-BitmapPlatformDeviceMac* BitmapPlatformDeviceMac::Create(CGContextRef context,
-                                                         int width,
-                                                         int height,
-                                                         bool is_opaque) {
-  void* data = malloc(height * width * 4);
-  if (!data) return NULL;
-
-  SkBitmap bitmap;
-  bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
-  bitmap.setPixels(data);
-  
-  // Note: The Windows implementation clears the Bitmap later on.
-  // This bears mentioning since removal of this line makes the
-  // unit tests only fail periodically (or when MallocPreScribble is set).
-  bitmap.eraseARGB(0, 0, 0, 0);
-  
-  bitmap.setIsOpaque(is_opaque);
-
-  if (is_opaque) {
-#ifndef NDEBUG
-    // To aid in finding bugs, we set the background color to something
-    // obviously wrong so it will be noticable when it is not cleared
-    bitmap.eraseARGB(255, 0, 255, 128);  // bright bluish green
-#endif
-  }
-  
-  CGColorSpaceRef color_space =
-    CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
-  // allocate a bitmap context with 4 components per pixel (RGBA):
-  CGContextRef bitmap_context =
-    CGBitmapContextCreate(data, width, height, 8, width*4,
-                          color_space, kCGImageAlphaPremultipliedLast);
-  
-  // Change the coordinate system to match WebCore's
-  CGContextTranslateCTM(bitmap_context, 0, height);
-  CGContextScaleCTM(bitmap_context, 1.0, -1.0);
-  CGColorSpaceRelease(color_space);
-
-  // The device object will take ownership of the graphics context.
-  return new BitmapPlatformDeviceMac(
-      new BitmapPlatformDeviceMacData(bitmap_context), bitmap);
-}
-
-// The device will own the bitmap, which corresponds to also owning the pixel
-// data. Therefore, we do not transfer ownership to the SkDevice's bitmap.
-BitmapPlatformDeviceMac::BitmapPlatformDeviceMac(
-    BitmapPlatformDeviceMacData* data, const SkBitmap& bitmap)
-    : PlatformDeviceMac(bitmap),
-      data_(data) {
-}
-
-// The copy constructor just adds another reference to the underlying data.
-// We use a const cast since the default Skia definitions don't define the
-// proper constedness that we expect (accessBitmap should really be const).
-BitmapPlatformDeviceMac::BitmapPlatformDeviceMac(
-    const BitmapPlatformDeviceMac& other)
-    : PlatformDeviceMac(
-          const_cast<BitmapPlatformDeviceMac&>(other).accessBitmap(true)),
-      data_(other.data_) {
-}
-
-BitmapPlatformDeviceMac::~BitmapPlatformDeviceMac() {
-}
-
-BitmapPlatformDeviceMac& BitmapPlatformDeviceMac::operator=(
-    const BitmapPlatformDeviceMac& other) {
-  data_ = other.data_;
-  return *this;
-}
-
-CGContextRef BitmapPlatformDeviceMac::GetBitmapContext() {
-  return data_->GetBitmapContext();
-}
-
-void BitmapPlatformDeviceMac::setMatrixClip(const SkMatrix& transform, 
-                                            const SkRegion& region) {
-  data_->SetMatrixClip(transform, region);
-}
-
-void BitmapPlatformDeviceMac::DrawToContext(CGContextRef context, int x, int y,
-                                            const CGRect* src_rect) {
-  bool created_dc = false;
-  if (!data_->bitmap_context_) {
-    created_dc = true;
-    GetBitmapContext();
-  }
-
-  // this should not make a copy of the bits, since we're not doing
-  // anything to trigger copy on write
-  CGImageRef image = CGBitmapContextCreateImage(data_->bitmap_context_);
-  CGRect bounds;
-  if (src_rect) {
-    bounds = *src_rect;
-    bounds.origin.x = x;
-    bounds.origin.y = y;
-    CGImageRef sub_image = CGImageCreateWithImageInRect(image, *src_rect);
-    CGContextDrawImage(context, bounds, sub_image);
-    CGImageRelease(sub_image);
-  } else {
-    bounds.origin.x = 0;
-    bounds.origin.y = 0;
-    bounds.size.width = width();
-    bounds.size.height = height();
-    CGContextDrawImage(context, bounds, image);
-  }
-  CGImageRelease(image);
-
-  if (created_dc)
-    data_->ReleaseBitmapContext();
-}
-  
-// Returns the color value at the specified location.
-SkColor BitmapPlatformDeviceMac::getColorAt(int x, int y) {
-  const SkBitmap& bitmap = accessBitmap(true);
-  SkAutoLockPixels lock(bitmap);
-  uint32_t* data = bitmap.getAddr32(0, 0);
-  return static_cast<SkColor>(data[x + y * width()]);
-}
-
-void BitmapPlatformDeviceMac::onAccessBitmap(SkBitmap*) {
-  // Not needed in CoreGraphics
-}
-
-void BitmapPlatformDeviceMac::processPixels(int x, int y,
-                                            int width, int height, 
-                                            adjustAlpha adjustor) {
-  const SkBitmap& bitmap = accessBitmap(true);
-  SkMatrix& matrix = data_->transform_;
-  int bitmap_start_x = SkScalarRound(matrix.getTranslateX()) + x;
-  int bitmap_start_y = SkScalarRound(matrix.getTranslateY()) + y;
-
-  SkAutoLockPixels lock(bitmap);
-  if (Constrain(bitmap.width(), &bitmap_start_x, &width) &&
-      Constrain(bitmap.height(), &bitmap_start_y, &height)) {
-    uint32_t* data = bitmap.getAddr32(0, 0);
-    size_t row_words = bitmap.rowBytes() / 4;
-    for (int i = 0; i < height; i++) {
-      size_t offset = (i + bitmap_start_y) * row_words + bitmap_start_x;
-      for (int j = 0; j < width; j++) {
-        adjustor(data + offset + j);
-      }
-    }
-  }
-}
-
-}  // namespace gfx
-