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Unified Diff: app/gfx/canvas.h

Issue 1132006: Move app/gfx/canvas and app/gfx/font to gfx/. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: Created 10 years, 9 months ago
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Index: app/gfx/canvas.h
===================================================================
--- app/gfx/canvas.h (revision 42303)
+++ app/gfx/canvas.h (working copy)
@@ -1,238 +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.
-
-#ifndef APP_GFX_CANVAS_H_
-#define APP_GFX_CANVAS_H_
-
-#if defined(OS_WIN)
-#include <windows.h>
-#endif
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "skia/ext/platform_canvas.h"
-
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
-typedef struct _cairo cairo_t;
-typedef struct _GdkPixbuf GdkPixbuf;
-#endif
-
-namespace gfx {
-
-class Font;
-class Rect;
-
-// Canvas is a SkCanvas subclass that provides a number of methods for common
-// operations used throughout an application built using base/gfx and app/gfx.
-//
-// All methods that take integer arguments (as is used throughout views)
-// end with Int. If you need to use methods provided by the superclass
-// you'll need to do a conversion. In particular you'll need to use
-// macro SkIntToScalar(xxx), or if converting from a scalar to an integer
-// SkScalarRound.
-//
-// A handful of methods in this class are overloaded providing an additional
-// argument of type SkXfermode::Mode. SkXfermode::Mode specifies how the
-// source and destination colors are combined. Unless otherwise specified,
-// the variant that does not take a SkXfermode::Mode uses a transfer mode
-// of kSrcOver_Mode.
-class Canvas : public skia::PlatformCanvas {
- 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,
-
- // 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,
- };
-
- // Creates an empty Canvas. Callers must use initialize before using the
- // canvas.
- Canvas();
-
- Canvas(int width, int height, bool is_opaque);
-
- virtual ~Canvas();
-
- // Retrieves the clip rectangle and sets it in the specified rectangle if any.
- // Returns true if the clip rect is non-empty.
- bool GetClipRect(gfx::Rect* clip_rect);
-
- // Wrapper function that takes integer arguments.
- // Returns true if the clip is non-empty.
- // See clipRect for specifics.
- bool ClipRectInt(int x, int y, int w, int h);
-
- // Test whether the provided rectangle intersects the current clip rect.
- bool IntersectsClipRectInt(int x, int y, int w, int h);
-
- // Wrapper function that takes integer arguments.
- // See translate() for specifics.
- void TranslateInt(int x, int y);
-
- // Wrapper function that takes integer arguments.
- // See scale() for specifics.
- void ScaleInt(int x, int y);
-
- // Fills the given rectangle with the given paint's parameters.
- void FillRectInt(int x, int y, int w, int h, const SkPaint& paint);
-
- // Fills the specified region with the specified color using a transfer
- // mode of SkXfermode::kSrcOver_Mode.
- void FillRectInt(const SkColor& color, int x, int y, int w, int h);
-
- // 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.
- void DrawRectInt(const SkColor& color, int x, int y, int w, int h);
-
- // 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.
- void DrawRectInt(const SkColor& color, int x, int y, int w, int h,
- SkXfermode::Mode mode);
-
- // Draws a single pixel line with the specified color.
- void DrawLineInt(const SkColor& color, int x1, int y1, int x2, int y2);
-
- // Draws a bitmap with the origin at the specified location. The upper left
- // corner of the bitmap is rendered at the specified location.
- void DrawBitmapInt(const SkBitmap& bitmap, int x, int y);
-
- // 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.
- void DrawBitmapInt(const SkBitmap& bitmap, int x, int y,
- const SkPaint& paint);
-
- // 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.
- 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);
- 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);
-
- // 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.
- void DrawStringInt(const std::wstring& text, const gfx::Font& font,
- const SkColor& color, int x, int y, int w, int h);
- void DrawStringInt(const std::wstring& text, const gfx::Font& font,
- const SkColor& color, const gfx::Rect& display_rect);
-
- // 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.
- void DrawStringInt(const std::wstring& text, const gfx::Font& font,
- const SkColor& color, int x, int y, int w, int h,
- int flags);
-
-#ifdef OS_WIN // Only implemented on Windows for now.
- // Draws text with a 1-pixel halo around it of the given color. It allows
- // ClearType to be drawn to an otherwise transparenct bitmap for drag images.
- // Drag images have only 1-bit of transparency, so we don't do any fancy
- // blurring.
- void DrawStringWithHalo(const std::wstring& text, const gfx::Font& font,
- const SkColor& text_color, const SkColor& halo_color,
- int x, int y, int w, int h, int flags);
-#endif
-
- // Draws a dotted gray rectangle used for focus purposes.
- void DrawFocusRect(int x, int y, int width, int height);
-
- // Tiles the image in the specified region.
- void TileImageInt(const SkBitmap& bitmap, int x, int y, int w, int h);
- void TileImageInt(const SkBitmap& bitmap, int src_x, int src_y,
- int dest_x, int dest_y, int w, int h);
-
- // Extracts a bitmap from the contents of this canvas.
- SkBitmap ExtractBitmap() const;
-
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
- // Applies current matrix on the canvas to the cairo context. This should be
- // invoked anytime you plan on drawing directly to the cairo context. Be
- // sure and set the matrix back to the identity when done.
- void ApplySkiaMatrixToCairoContext(cairo_t* cr);
-
- // Draw the pixbuf in its natural size at (x, y).
- void DrawGdkPixbuf(GdkPixbuf* pixbuf, int x, int y);
-#endif
-
- // Compute the size required to draw some text with the provided font.
- // Attempts to fit the text with the provided width and height. Increases
- // height and then width as needed to make the text fit. This method
- // supports multiple lines.
- static void SizeStringInt(const std::wstring& test, const gfx::Font& font,
- int *width, int* height, int flags);
-
- // Returns the default text alignment to be used when drawing text on a
- // gfx::Canvas based on the directionality of the system locale language. This
- // function is used by gfx::Canvas::DrawStringInt when the text alignment is
- // not specified.
- //
- // This function returns either gfx::Canvas::TEXT_ALIGN_LEFT or
- // gfx::Canvas::TEXT_ALIGN_RIGHT.
- static int DefaultCanvasTextAlignment();
-
- private:
-#if defined(OS_WIN)
- // 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.
- void DrawStringInt(const std::wstring& text, HFONT font,
- const SkColor& color, int x, int y, int w, int h,
- int flags);
-#endif
-
- DISALLOW_COPY_AND_ASSIGN(Canvas);
-};
-
-} // namespace gfx;
-
-#endif // APP_GFX_CANVAS_H_
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