Revert 50784 - Canvas refactoring part 3....

gfx/canvas.h

 // Copyright (c) 2010 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.
 
 #ifndef GFX_CANVAS_H_
 #define GFX_CANVAS_H_
 
-#include <string>
-
-#include "gfx/native_widget_types.h"
-// TODO(beng): remove this include when we no longer depend on SkTypes.
-#include "skia/ext/platform_canvas.h"
+#include "gfx/canvas_skia.h"
 
 namespace gfx {
 
-class CanvasSkia;
-class Font;
-class Rect;
+// Temporary compatibility shim, remove once Canvas2->Canvas.
+class Canvas : public CanvasSkia {
+ public:
+  Canvas(int width, int height, bool is_opaque)
+      : CanvasSkia(width, height, is_opaque) {
+  }
+  Canvas() : CanvasSkia() {}
 
-// TODO(beng): documentation.
-class Canvas {
- public:
-  // Specifies the alignment for text rendered with the DrawStringInt method.
-  enum {
-    TEXT_ALIGN_LEFT = 1,
-    TEXT_ALIGN_CENTER = 2,
-    TEXT_ALIGN_RIGHT = 4,
-    TEXT_VALIGN_TOP = 8,
-    TEXT_VALIGN_MIDDLE = 16,
-    TEXT_VALIGN_BOTTOM = 32,
+  // Overridden from Canvas2:
+  Canvas* AsCanvas() {
+    return this;
+  }
 
-    // Specifies the text consists of multiple lines.
-    MULTI_LINE = 64,
-
-    // By default DrawStringInt does not process the prefix ('&') character
-    // specially. That is, the string "&foo" is rendered as "&foo". When
-    // rendering text from a resource that uses the prefix character for
-    // mnemonics, the prefix should be processed and can be rendered as an
-    // underline (SHOW_PREFIX), or not rendered at all (HIDE_PREFIX).
-    SHOW_PREFIX = 128,
-    HIDE_PREFIX = 256,
-
-    // Prevent ellipsizing
-    NO_ELLIPSIS = 512,
-
-    // Specifies if words can be split by new lines.
-    // This only works with MULTI_LINE.
-    CHARACTER_BREAK = 1024,
-
-    // Instructs DrawStringInt() to render the text using RTL directionality.
-    // In most cases, passing this flag is not necessary because information
-    // about the text directionality is going to be embedded within the string
-    // in the form of special Unicode characters. However, we don't insert
-    // directionality characters into strings if the locale is LTR because some
-    // platforms (for example, an English Windows XP with no RTL fonts
-    // installed) don't support these characters. Thus, this flag should be
-    // used to render text using RTL directionality when the locale is LTR.
-    FORCE_RTL_DIRECTIONALITY = 2048,
-  };
-
-  virtual ~Canvas() {}
-
-  // Creates an empty canvas. Must be initialized before it can be used.
-  static Canvas* CreateCanvas();
-
-  // Creates a canvas with the specified size.
-  static Canvas* CreateCanvas(int width, int height, bool is_opaque);
-
-  // Retrieves the clip rectangle and sets it in the specified rectangle if any.
-  // Returns true if the clip rect is non-empty.
-  virtual bool GetClipRect(gfx::Rect* clip_rect) = 0;
-
-  // Wrapper function that takes integer arguments.
-  // Returns true if the clip is non-empty.
-  // See clipRect for specifics.
-  virtual bool ClipRectInt(int x, int y, int w, int h) = 0;
-
-  // Test whether the provided rectangle intersects the current clip rect.
-  virtual bool IntersectsClipRectInt(int x, int y, int w, int h) = 0;
-
-  // Wrapper function that takes integer arguments.
-  // See translate() for specifics.
-  virtual void TranslateInt(int x, int y) = 0;
-
-  // Wrapper function that takes integer arguments.
-  // See scale() for specifics.
-  virtual void ScaleInt(int x, int y) = 0;
-
-  // Fills the given rectangle with the given paint's parameters.
-  virtual void FillRectInt(int x, int y, int w, int h,
-                           const SkPaint& paint) = 0;
-
-  // Fills the specified region with the specified color using a transfer
-  // mode of SkXfermode::kSrcOver_Mode.
-  virtual void FillRectInt(const SkColor& color, int x, int y, int w,
-                           int h) = 0;
-
-  // Draws a single pixel rect in the specified region with the specified
-  // color, using a transfer mode of SkXfermode::kSrcOver_Mode.
-  //
-  // NOTE: if you need a single pixel line, use DraLineInt.
-  virtual void DrawRectInt(const SkColor& color, int x, int y, int w,
-                           int h) = 0;
-
-  // Draws a single pixel rect in the specified region with the specified
-  // color and transfer mode.
-  //
-  // NOTE: if you need a single pixel line, use DraLineInt.
-  virtual void DrawRectInt(const SkColor& color, int x, int y, int w, int h,
-                           SkXfermode::Mode mode) = 0;
-
-  // Draws a single pixel line with the specified color.
-  virtual void DrawLineInt(const SkColor& color, int x1, int y1, int x2,
-                           int y2) = 0;
-
-  // Draws a bitmap with the origin at the specified location. The upper left
-  // corner of the bitmap is rendered at the specified location.
-  virtual void DrawBitmapInt(const SkBitmap& bitmap, int x, int y) = 0;
-
-  // Draws a bitmap with the origin at the specified location, using the
-  // specified paint. The upper left corner of the bitmap is rendered at the
-  // specified location.
-  virtual void DrawBitmapInt(const SkBitmap& bitmap, int x, int y,
-                             const SkPaint& paint) = 0;
-
-  // Draws a portion of a bitmap in the specified location. The src parameters
-  // correspond to the region of the bitmap to draw in the region defined
-  // by the dest coordinates.
-  //
-  // If the width or height of the source differs from that of the destination,
-  // the bitmap will be scaled. When scaling down, it is highly recommended
-  // that you call buildMipMap(false) on your bitmap to ensure that it has
-  // a mipmap, which will result in much higher-quality output. Set |filter|
-  // to use filtering for bitmaps, otherwise the nearest-neighbor algorithm
-  // is used for resampling.
-  //
-  // An optional custom SkPaint can be provided.
-  virtual void DrawBitmapInt(const SkBitmap& bitmap, int src_x, int src_y,
-                             int src_w, int src_h, int dest_x, int dest_y,
-                             int dest_w, int dest_h, bool filter) = 0;
-  virtual void DrawBitmapInt(const SkBitmap& bitmap, int src_x, int src_y,
-                             int src_w, int src_h, int dest_x, int dest_y,
-                             int dest_w, int dest_h, bool filter,
-                             const SkPaint& paint) = 0;
-
-  // Draws text with the specified color, font and location. The text is
-  // aligned to the left, vertically centered, clipped to the region. If the
-  // text is too big, it is truncated and '...' is added to the end.
-  virtual void DrawStringInt(const std::wstring& text, const gfx::Font& font,
-                             const SkColor& color, int x, int y, int w,
-                             int h) = 0;
-  virtual void DrawStringInt(const std::wstring& text, const gfx::Font& font,
-                             const SkColor& color,
-                             const gfx::Rect& display_rect) = 0;
-
-  // Draws text with the specified color, font and location. The last argument
-  // specifies flags for how the text should be rendered. It can be one of
-  // TEXT_ALIGN_CENTER, TEXT_ALIGN_RIGHT or TEXT_ALIGN_LEFT.
-  virtual void DrawStringInt(const std::wstring& text, const gfx::Font& font,
-                             const SkColor& color, int x, int y, int w, int h,
-                             int flags) = 0;
-
-  // Draws a dotted gray rectangle used for focus purposes.
-  virtual void DrawFocusRect(int x, int y, int width, int height) = 0;
-
-  // Tiles the image in the specified region.
-  virtual void TileImageInt(const SkBitmap& bitmap, int x, int y, int w,
-                            int h) = 0;
-  virtual void TileImageInt(const SkBitmap& bitmap, int src_x, int src_y,
-                            int dest_x, int dest_y, int w, int h) = 0;
-
-  // TODO(beng): remove this once we don't need to use any skia-specific methods
-  //             through this interface.
-  // A quick and dirty way to obtain the underlying SkCanvas.
-  virtual CanvasSkia* AsCanvasSkia() { return NULL; }
-  virtual const CanvasSkia* AsCanvasSkia() const { return NULL; }
+ private:
+  DISALLOW_COPY_AND_ASSIGN(Canvas);
 };
 
-class CanvasPaint {
- public:
-  virtual ~CanvasPaint() {}
-
-  // Creates a canvas that paints to |view| when it is destroyed. The canvas is
-  // sized to the client area of |view|.
-  static CanvasPaint* CreateCanvasPaint(gfx::NativeView view);
-
-  // Returns true if the canvas has an invalid rect that needs to be repainted.
-  virtual bool IsValid() const = 0;
-
-  // Returns the rectangle that is invalid.
-  virtual gfx::Rect GetInvalidRect() const = 0;
-
-  // Returns the underlying Canvas.
-  virtual Canvas* AsCanvas() = 0;
-};
-
-}  // namespace gfx;
+}
 
 #endif  // GFX_CANVAS_H_