Canvas refactoring part 2....

gfx/canvas.cc

Index: gfx/canvas.cc
===================================================================
--- gfx/canvas.cc	(revision 50557)
+++ gfx/canvas.cc	(working copy)
@@ -1,325 +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 "gfx/canvas.h"
-
-#include <limits>
-
-#include "base/i18n/rtl.h"
-#include "base/logging.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) {
-  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) {
-  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) {
-  SkRect clip;
-  return getClipBounds(&clip) &&
-      clip.intersect(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(x + w),
-                     SkIntToScalar(y + h));
-}
-
-void Canvas::TranslateInt(int x, int y) {
-  translate(SkIntToScalar(x), SkIntToScalar(y));
-}
-
-void Canvas::ScaleInt(int x, int y) {
-  scale(SkIntToScalar(x), SkIntToScalar(y));
-}
-
-void Canvas::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) {
-  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) {
-  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) {
-  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) {
-  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) {
-  // 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;
-    dots->setConfig(SkBitmap::kARGB_8888_Config, col_pixels, row_pixels);
-    dots->allocPixels();
-    dots->eraseARGB(0, 0, 0, 0);
-
-    uint32_t* dot = dots->getAddr32(0, 0);
-    for (int i = 0; i < row_pixels; i++) {
-      for (int u = 0; u < col_pixels; u++) {
-        if ((u % 2 + i % 2) % 2 != 0) {
-          dot[i * row_pixels + u] = SK_ColorGRAY;
-        }
-      }
-    }
-  }
-
-  // First the horizontal lines.
-
-  // Make a shader for the bitmap with an origin of the box we'll draw. This
-  // shader is refcounted and will have an initial refcount of 1.
-  SkShader* shader = SkShader::CreateBitmapShader(
-      *dots, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode);
-  // Assign the shader to the paint & release our reference. The paint will
-  // now own the shader and the shader will be destroyed when the paint goes
-  // out of scope.
-  SkPaint paint;
-  paint.setShader(shader);
-  shader->unref();
-
-  SkRect rect;
-  rect.set(SkIntToScalar(x), SkIntToScalar(y),
-           SkIntToScalar(x + width), SkIntToScalar(y + 1));
-  drawRect(rect, paint);
-  rect.set(SkIntToScalar(x), SkIntToScalar(y + height - 1),
-           SkIntToScalar(x + width), SkIntToScalar(y + height));
-  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) {
-  drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y));
-}
-
-void Canvas::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) {
-  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) {
-  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;
-
-  SkRect dest_rect = { SkIntToScalar(dest_x),
-                       SkIntToScalar(dest_y),
-                       SkIntToScalar(dest_x + dest_w),
-                       SkIntToScalar(dest_y + dest_h) };
-
-  if (src_w == dest_w && src_h == dest_h) {
-    // Workaround for apparent bug in Skia that causes image to occasionally
-    // shift.
-    SkIRect src_rect = { src_x, src_y, src_x + src_w, src_y + src_h };
-    drawBitmapRect(bitmap, &src_rect, dest_rect, &paint);
-    return;
-  }
-
-  // Make a bitmap shader that contains the bitmap we want to draw. This is
-  // basically what SkCanvas.drawBitmap does internally, but it gives us
-  // more control over quality and will use the mipmap in the source image if
-  // it has one, whereas drawBitmap won't.
-  SkShader* shader = SkShader::CreateBitmapShader(bitmap,
-                                                  SkShader::kRepeat_TileMode,
-                                                  SkShader::kRepeat_TileMode);
-  SkMatrix shader_scale;
-  shader_scale.setScale(SkFloatToScalar(static_cast<float>(dest_w) / src_w),
-                        SkFloatToScalar(static_cast<float>(dest_h) / src_h));
-  shader_scale.preTranslate(SkIntToScalar(-src_x), SkIntToScalar(-src_y));
-  shader_scale.postTranslate(SkIntToScalar(dest_x), SkIntToScalar(dest_y));
-  shader->setLocalMatrix(shader_scale);
-
-  // Set up our paint to use the shader & release our reference (now just owned
-  // 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) {
-  DrawStringInt(text, font, color, x, y, w, h,
-                gfx::Canvas::DefaultCanvasTextAlignment());
-}
-
-void Canvas::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) {
-  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) {
-  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 {
-  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() {
-  return this;
-}
-
-// static
-int Canvas::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;
-}
-
-Canvas2* Canvas2::CreateCanvas(int width, int height, bool is_opaque) {
-  return new Canvas(width, height, is_opaque);
-}
-
-#if defined(OS_WIN)
-// TODO(beng): move to canvas_win.cc, etc.
-class CanvasPaintWin : public CanvasPaint, public CanvasPaint2 {
- public:
-  CanvasPaintWin(gfx::NativeView view) : CanvasPaint(view) {}
-
-  // Overridden from CanvasPaint2:
-  virtual bool IsValid() const {
-    return isEmpty();
-  }
-
-  virtual gfx::Rect GetInvalidRect() const {
-    return gfx::Rect(paintStruct().rcPaint);
-  }
-
-  virtual Canvas2* AsCanvas2() {
-    return this;
-  }
-};
-#endif
-
-CanvasPaint2* CanvasPaint2::CreateCanvasPaint(gfx::NativeView view) {
-#if defined(OS_WIN)
-  return new CanvasPaintWin(view);
-#else
-  return NULL;
-#endif
-}
-
-}  // namespace gfx