Canvas refactoring part 2....

gfx/canvas_skia.cc

 // 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 "gfx/canvas.h"
 
 #include <limits>
 
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
+#include "gfx/canvas.h"
 #include "gfx/font.h"
 #include "gfx/rect.h"
 #include "third_party/skia/include/core/SkShader.h"
 
 #if defined(OS_WIN)
 #include "gfx/canvas_paint.h"
 #endif
 
 namespace gfx {
 
-bool Canvas::GetClipRect(gfx::Rect* r) {
+Canvas* CanvasSkia::AsCanvas() {
+    return this;
+}
+
+bool CanvasSkia::GetClipRect(gfx::Rect* r) {
   SkRect clip;
   if (!getClipBounds(&clip)) {
     if (r)
       r->SetRect(0, 0, 0, 0);
     return false;
   }
   r->SetRect(SkScalarRound(clip.fLeft), SkScalarRound(clip.fTop),
              SkScalarRound(clip.fRight - clip.fLeft),
              SkScalarRound(clip.fBottom - clip.fTop));
   return true;
 }
 
-bool Canvas::ClipRectInt(int x, int y, int w, int h) {
+bool CanvasSkia::ClipRectInt(int x, int y, int w, int h) {
   SkRect new_clip;
   new_clip.set(SkIntToScalar(x), SkIntToScalar(y),
                SkIntToScalar(x + w), SkIntToScalar(y + h));
   return clipRect(new_clip);
 }
 
-bool Canvas::IntersectsClipRectInt(int x, int y, int w, int h) {
+bool CanvasSkia::IntersectsClipRectInt(int x, int y, int w, int h) {
   SkRect clip;
   return getClipBounds(&clip) &&
       clip.intersect(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(x + w),
                      SkIntToScalar(y + h));
 }
 
-void Canvas::TranslateInt(int x, int y) {
+void CanvasSkia::TranslateInt(int x, int y) {
   translate(SkIntToScalar(x), SkIntToScalar(y));
 }
 
-void Canvas::ScaleInt(int x, int y) {
+void CanvasSkia::ScaleInt(int x, int y) {
   scale(SkIntToScalar(x), SkIntToScalar(y));
 }
 
-void Canvas::FillRectInt(const SkColor& color, int x, int y, int w, int h) {
+void CanvasSkia::FillRectInt(const SkColor& color, int x, int y, int w, int h) {
   SkPaint paint;
   paint.setColor(color);
   paint.setStyle(SkPaint::kFill_Style);
   paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
   FillRectInt(x, y, w, h, paint);
 }
 
-void Canvas::FillRectInt(int x, int y, int w, int h, const SkPaint& paint) {
+void CanvasSkia::FillRectInt(int x, int y, int w, int h, const SkPaint& paint) {
   SkIRect rc = {x, y, x + w, y + h};
   drawIRect(rc, paint);
 }
 
-void Canvas::DrawRectInt(const SkColor& color, int x, int y, int w, int h) {
+void CanvasSkia::DrawRectInt(const SkColor& color, int x, int y, int w, int h) {
   DrawRectInt(color, x, y, w, h, SkXfermode::kSrcOver_Mode);
 }
 
-void Canvas::DrawRectInt(const SkColor& color, int x, int y, int w, int h,
-                         SkXfermode::Mode mode) {
+void CanvasSkia::DrawRectInt(const SkColor& color, int x, int y, int w, int h,
+                             SkXfermode::Mode mode) {
   SkPaint paint;
   paint.setColor(color);
   paint.setStyle(SkPaint::kStroke_Style);
   // Set a stroke width of 0, which will put us down the stroke rect path.  If
   // we set a stroke width of 1, for example, this will internally create a
   // path and fill it, which causes problems near the edge of the canvas.
   paint.setStrokeWidth(SkIntToScalar(0));
   paint.setXfermodeMode(mode);
 
   SkIRect rc = {x, y, x + w, y + h};
   drawIRect(rc, paint);
 }
 
-void Canvas::DrawLineInt(const SkColor& color, int x1, int y1, int x2, int y2) {
+void CanvasSkia::DrawLineInt(const SkColor& color, int x1, int y1, int x2,
+                             int y2) {
   SkPaint paint;
   paint.setColor(color);
   paint.setStrokeWidth(SkIntToScalar(1));
   drawLine(SkIntToScalar(x1), SkIntToScalar(y1), SkIntToScalar(x2),
            SkIntToScalar(y2), paint);
 }
 
-void Canvas::DrawFocusRect(int x, int y, int width, int height) {
+void CanvasSkia::DrawFocusRect(int x, int y, int width, int height) {
   // Create a 2D bitmap containing alternating on/off pixels - we do this
   // so that you never get two pixels of the same color around the edges
   // of the focus rect (this may mean that opposing edges of the rect may
   // have a dot pattern out of phase to each other).
   static SkBitmap* dots = NULL;
   if (!dots) {
     int col_pixels = 32;
     int row_pixels = 32;
 
     dots = new SkBitmap;
@@ skipping 33 matching lines @@
   drawRect(rect, paint);
 
   rect.set(SkIntToScalar(x), SkIntToScalar(y),
            SkIntToScalar(x + 1), SkIntToScalar(y + height));
   drawRect(rect, paint);
   rect.set(SkIntToScalar(x + width - 1), SkIntToScalar(y),
            SkIntToScalar(x + width), SkIntToScalar(y + height));
   drawRect(rect, paint);
 }
 
-void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int x, int y) {
+void CanvasSkia::DrawBitmapInt(const SkBitmap& bitmap, int x, int y) {
   drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y));
 }
 
-void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int x, int y,
-                           const SkPaint& paint) {
+void CanvasSkia::DrawBitmapInt(const SkBitmap& bitmap, int x, int y,
+                               const SkPaint& paint) {
   drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y), &paint);
 }
 
-void Canvas::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) {
+void CanvasSkia::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) {
   SkPaint p;
   DrawBitmapInt(bitmap, src_x, src_y, src_w, src_h, dest_x, dest_y,
                 dest_w, dest_h, filter, p);
 }
 
-void Canvas::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) {
+void CanvasSkia::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) {
   DLOG_ASSERT(src_x + src_w < std::numeric_limits<int16_t>::max() &&
               src_y + src_h < std::numeric_limits<int16_t>::max());
   if (src_w <= 0 || src_h <= 0 || dest_w <= 0 || dest_h <= 0) {
     NOTREACHED() << "Attempting to draw bitmap to/from an empty rect!";
     return;
   }
 
   if (!IntersectsClipRectInt(dest_x, dest_y, dest_w, dest_h))
     return;
 
@@ skipping 28 matching lines @@
   // by the paint).
   SkPaint p(paint);
   p.setFilterBitmap(filter);
   p.setShader(shader);
   shader->unref();
 
   // The rect will be filled by the bitmap.
   drawRect(dest_rect, p);
 }
 
-void Canvas::DrawStringInt(const std::wstring& text,
-                           const gfx::Font& font,
-                           const SkColor& color,
-                           int x, int y, int w, int h) {
+void CanvasSkia::DrawStringInt(const std::wstring& text,
+                               const gfx::Font& font,
+                               const SkColor& color,
+                               int x, int y, int w, int h) {
   DrawStringInt(text, font, color, x, y, w, h,
-                gfx::Canvas::DefaultCanvasTextAlignment());
+                gfx::CanvasSkia::DefaultCanvasTextAlignment());
 }
 
-void Canvas::DrawStringInt(const std::wstring& text,
-                           const gfx::Font& font,
-                           const SkColor& color,
-                           const gfx::Rect& display_rect) {
+void CanvasSkia::DrawStringInt(const std::wstring& text,
+                               const gfx::Font& font,
+                               const SkColor& color,
+                               const gfx::Rect& display_rect) {
   DrawStringInt(text, font, color, display_rect.x(), display_rect.y(),
                 display_rect.width(), display_rect.height());
 }
 
-void Canvas::TileImageInt(const SkBitmap& bitmap, int x, int y, int w, int h) {
+void CanvasSkia::TileImageInt(const SkBitmap& bitmap, int x, int y, int w,
+                              int h) {
   TileImageInt(bitmap, 0, 0, x, y, w, h);
 }
 
-void Canvas::TileImageInt(const SkBitmap& bitmap, int src_x, int src_y,
-                          int dest_x, int dest_y, int w, int h) {
+void CanvasSkia::TileImageInt(const SkBitmap& bitmap, int src_x, int src_y,
+                              int dest_x, int dest_y, int w, int h) {
   if (!IntersectsClipRectInt(dest_x, dest_y, w, h))
     return;
 
   SkPaint paint;
 
   SkShader* shader = SkShader::CreateBitmapShader(bitmap,
                                                   SkShader::kRepeat_TileMode,
                                                   SkShader::kRepeat_TileMode);
   paint.setShader(shader);
   paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
 
   // CreateBitmapShader returns a Shader with a reference count of one, we
   // need to unref after paint takes ownership of the shader.
   shader->unref();
   save();
   translate(SkIntToScalar(dest_x - src_x), SkIntToScalar(dest_y - src_y));
   ClipRectInt(src_x, src_y, w, h);
   drawPaint(paint);
   restore();
 }
 
-SkBitmap Canvas::ExtractBitmap() const {
+SkBitmap CanvasSkia::ExtractBitmap() const {
   const SkBitmap& device_bitmap = getDevice()->accessBitmap(false);
 
   // Make a bitmap to return, and a canvas to draw into it. We don't just want
   // to call extractSubset or the copy constuctor, since we want an actual copy
   // of the bitmap.
   SkBitmap result;
   device_bitmap.copyTo(&result, SkBitmap::kARGB_8888_Config);
   return result;
 }
 
-Canvas* Canvas::AsCanvas() {
+CanvasSkia* CanvasSkia::AsCanvasSkia() {
   return this;
 }
 
 // static
-int Canvas::DefaultCanvasTextAlignment() {
+int CanvasSkia::DefaultCanvasTextAlignment() {
   if (!base::i18n::IsRTL())
     return gfx::Canvas::TEXT_ALIGN_LEFT;
   return gfx::Canvas::TEXT_ALIGN_RIGHT;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Canvas2, public:
 
 Canvas2* Canvas2::CreateCanvas() {
   return new Canvas;
@@ skipping 26 matching lines @@
 
 CanvasPaint2* CanvasPaint2::CreateCanvasPaint(gfx::NativeView view) {
 #if defined(OS_WIN)
   return new CanvasPaintWin(view);
 #else
   return NULL;
 #endif
 }
 
 }  // namespace gfx