| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "gfx/canvas.h" | |
| 6 | |
| 7 #include <limits> | |
| 8 | |
| 9 #include "base/i18n/rtl.h" | |
| 10 #include "base/logging.h" | |
| 11 #include "gfx/font.h" | |
| 12 #include "gfx/rect.h" | |
| 13 #include "third_party/skia/include/core/SkShader.h" | |
| 14 | |
| 15 #if defined(OS_WIN) | |
| 16 #include "gfx/canvas_paint.h" | |
| 17 #endif | |
| 18 | |
| 19 namespace gfx { | |
| 20 | |
| 21 bool Canvas::GetClipRect(gfx::Rect* r) { | |
| 22 SkRect clip; | |
| 23 if (!getClipBounds(&clip)) { | |
| 24 if (r) | |
| 25 r->SetRect(0, 0, 0, 0); | |
| 26 return false; | |
| 27 } | |
| 28 r->SetRect(SkScalarRound(clip.fLeft), SkScalarRound(clip.fTop), | |
| 29 SkScalarRound(clip.fRight - clip.fLeft), | |
| 30 SkScalarRound(clip.fBottom - clip.fTop)); | |
| 31 return true; | |
| 32 } | |
| 33 | |
| 34 bool Canvas::ClipRectInt(int x, int y, int w, int h) { | |
| 35 SkRect new_clip; | |
| 36 new_clip.set(SkIntToScalar(x), SkIntToScalar(y), | |
| 37 SkIntToScalar(x + w), SkIntToScalar(y + h)); | |
| 38 return clipRect(new_clip); | |
| 39 } | |
| 40 | |
| 41 bool Canvas::IntersectsClipRectInt(int x, int y, int w, int h) { | |
| 42 SkRect clip; | |
| 43 return getClipBounds(&clip) && | |
| 44 clip.intersect(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(x + w), | |
| 45 SkIntToScalar(y + h)); | |
| 46 } | |
| 47 | |
| 48 void Canvas::TranslateInt(int x, int y) { | |
| 49 translate(SkIntToScalar(x), SkIntToScalar(y)); | |
| 50 } | |
| 51 | |
| 52 void Canvas::ScaleInt(int x, int y) { | |
| 53 scale(SkIntToScalar(x), SkIntToScalar(y)); | |
| 54 } | |
| 55 | |
| 56 void Canvas::FillRectInt(const SkColor& color, int x, int y, int w, int h) { | |
| 57 SkPaint paint; | |
| 58 paint.setColor(color); | |
| 59 paint.setStyle(SkPaint::kFill_Style); | |
| 60 paint.setXfermodeMode(SkXfermode::kSrcOver_Mode); | |
| 61 FillRectInt(x, y, w, h, paint); | |
| 62 } | |
| 63 | |
| 64 void Canvas::FillRectInt(int x, int y, int w, int h, const SkPaint& paint) { | |
| 65 SkIRect rc = {x, y, x + w, y + h}; | |
| 66 drawIRect(rc, paint); | |
| 67 } | |
| 68 | |
| 69 void Canvas::DrawRectInt(const SkColor& color, int x, int y, int w, int h) { | |
| 70 DrawRectInt(color, x, y, w, h, SkXfermode::kSrcOver_Mode); | |
| 71 } | |
| 72 | |
| 73 void Canvas::DrawRectInt(const SkColor& color, int x, int y, int w, int h, | |
| 74 SkXfermode::Mode mode) { | |
| 75 SkPaint paint; | |
| 76 paint.setColor(color); | |
| 77 paint.setStyle(SkPaint::kStroke_Style); | |
| 78 // Set a stroke width of 0, which will put us down the stroke rect path. If | |
| 79 // we set a stroke width of 1, for example, this will internally create a | |
| 80 // path and fill it, which causes problems near the edge of the canvas. | |
| 81 paint.setStrokeWidth(SkIntToScalar(0)); | |
| 82 paint.setXfermodeMode(mode); | |
| 83 | |
| 84 SkIRect rc = {x, y, x + w, y + h}; | |
| 85 drawIRect(rc, paint); | |
| 86 } | |
| 87 | |
| 88 void Canvas::DrawLineInt(const SkColor& color, int x1, int y1, int x2, int y2) { | |
| 89 SkPaint paint; | |
| 90 paint.setColor(color); | |
| 91 paint.setStrokeWidth(SkIntToScalar(1)); | |
| 92 drawLine(SkIntToScalar(x1), SkIntToScalar(y1), SkIntToScalar(x2), | |
| 93 SkIntToScalar(y2), paint); | |
| 94 } | |
| 95 | |
| 96 void Canvas::DrawFocusRect(int x, int y, int width, int height) { | |
| 97 // Create a 2D bitmap containing alternating on/off pixels - we do this | |
| 98 // so that you never get two pixels of the same color around the edges | |
| 99 // of the focus rect (this may mean that opposing edges of the rect may | |
| 100 // have a dot pattern out of phase to each other). | |
| 101 static SkBitmap* dots = NULL; | |
| 102 if (!dots) { | |
| 103 int col_pixels = 32; | |
| 104 int row_pixels = 32; | |
| 105 | |
| 106 dots = new SkBitmap; | |
| 107 dots->setConfig(SkBitmap::kARGB_8888_Config, col_pixels, row_pixels); | |
| 108 dots->allocPixels(); | |
| 109 dots->eraseARGB(0, 0, 0, 0); | |
| 110 | |
| 111 uint32_t* dot = dots->getAddr32(0, 0); | |
| 112 for (int i = 0; i < row_pixels; i++) { | |
| 113 for (int u = 0; u < col_pixels; u++) { | |
| 114 if ((u % 2 + i % 2) % 2 != 0) { | |
| 115 dot[i * row_pixels + u] = SK_ColorGRAY; | |
| 116 } | |
| 117 } | |
| 118 } | |
| 119 } | |
| 120 | |
| 121 // First the horizontal lines. | |
| 122 | |
| 123 // Make a shader for the bitmap with an origin of the box we'll draw. This | |
| 124 // shader is refcounted and will have an initial refcount of 1. | |
| 125 SkShader* shader = SkShader::CreateBitmapShader( | |
| 126 *dots, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); | |
| 127 // Assign the shader to the paint & release our reference. The paint will | |
| 128 // now own the shader and the shader will be destroyed when the paint goes | |
| 129 // out of scope. | |
| 130 SkPaint paint; | |
| 131 paint.setShader(shader); | |
| 132 shader->unref(); | |
| 133 | |
| 134 SkRect rect; | |
| 135 rect.set(SkIntToScalar(x), SkIntToScalar(y), | |
| 136 SkIntToScalar(x + width), SkIntToScalar(y + 1)); | |
| 137 drawRect(rect, paint); | |
| 138 rect.set(SkIntToScalar(x), SkIntToScalar(y + height - 1), | |
| 139 SkIntToScalar(x + width), SkIntToScalar(y + height)); | |
| 140 drawRect(rect, paint); | |
| 141 | |
| 142 rect.set(SkIntToScalar(x), SkIntToScalar(y), | |
| 143 SkIntToScalar(x + 1), SkIntToScalar(y + height)); | |
| 144 drawRect(rect, paint); | |
| 145 rect.set(SkIntToScalar(x + width - 1), SkIntToScalar(y), | |
| 146 SkIntToScalar(x + width), SkIntToScalar(y + height)); | |
| 147 drawRect(rect, paint); | |
| 148 } | |
| 149 | |
| 150 void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int x, int y) { | |
| 151 drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y)); | |
| 152 } | |
| 153 | |
| 154 void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int x, int y, | |
| 155 const SkPaint& paint) { | |
| 156 drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y), &paint); | |
| 157 } | |
| 158 | |
| 159 void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int src_x, int src_y, | |
| 160 int src_w, int src_h, int dest_x, int dest_y, | |
| 161 int dest_w, int dest_h, | |
| 162 bool filter) { | |
| 163 SkPaint p; | |
| 164 DrawBitmapInt(bitmap, src_x, src_y, src_w, src_h, dest_x, dest_y, | |
| 165 dest_w, dest_h, filter, p); | |
| 166 } | |
| 167 | |
| 168 void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int src_x, int src_y, | |
| 169 int src_w, int src_h, int dest_x, int dest_y, | |
| 170 int dest_w, int dest_h, | |
| 171 bool filter, const SkPaint& paint) { | |
| 172 DLOG_ASSERT(src_x + src_w < std::numeric_limits<int16_t>::max() && | |
| 173 src_y + src_h < std::numeric_limits<int16_t>::max()); | |
| 174 if (src_w <= 0 || src_h <= 0 || dest_w <= 0 || dest_h <= 0) { | |
| 175 NOTREACHED() << "Attempting to draw bitmap to/from an empty rect!"; | |
| 176 return; | |
| 177 } | |
| 178 | |
| 179 if (!IntersectsClipRectInt(dest_x, dest_y, dest_w, dest_h)) | |
| 180 return; | |
| 181 | |
| 182 SkRect dest_rect = { SkIntToScalar(dest_x), | |
| 183 SkIntToScalar(dest_y), | |
| 184 SkIntToScalar(dest_x + dest_w), | |
| 185 SkIntToScalar(dest_y + dest_h) }; | |
| 186 | |
| 187 if (src_w == dest_w && src_h == dest_h) { | |
| 188 // Workaround for apparent bug in Skia that causes image to occasionally | |
| 189 // shift. | |
| 190 SkIRect src_rect = { src_x, src_y, src_x + src_w, src_y + src_h }; | |
| 191 drawBitmapRect(bitmap, &src_rect, dest_rect, &paint); | |
| 192 return; | |
| 193 } | |
| 194 | |
| 195 // Make a bitmap shader that contains the bitmap we want to draw. This is | |
| 196 // basically what SkCanvas.drawBitmap does internally, but it gives us | |
| 197 // more control over quality and will use the mipmap in the source image if | |
| 198 // it has one, whereas drawBitmap won't. | |
| 199 SkShader* shader = SkShader::CreateBitmapShader(bitmap, | |
| 200 SkShader::kRepeat_TileMode, | |
| 201 SkShader::kRepeat_TileMode); | |
| 202 SkMatrix shader_scale; | |
| 203 shader_scale.setScale(SkFloatToScalar(static_cast<float>(dest_w) / src_w), | |
| 204 SkFloatToScalar(static_cast<float>(dest_h) / src_h)); | |
| 205 shader_scale.preTranslate(SkIntToScalar(-src_x), SkIntToScalar(-src_y)); | |
| 206 shader_scale.postTranslate(SkIntToScalar(dest_x), SkIntToScalar(dest_y)); | |
| 207 shader->setLocalMatrix(shader_scale); | |
| 208 | |
| 209 // Set up our paint to use the shader & release our reference (now just owned | |
| 210 // by the paint). | |
| 211 SkPaint p(paint); | |
| 212 p.setFilterBitmap(filter); | |
| 213 p.setShader(shader); | |
| 214 shader->unref(); | |
| 215 | |
| 216 // The rect will be filled by the bitmap. | |
| 217 drawRect(dest_rect, p); | |
| 218 } | |
| 219 | |
| 220 void Canvas::DrawStringInt(const std::wstring& text, | |
| 221 const gfx::Font& font, | |
| 222 const SkColor& color, | |
| 223 int x, int y, int w, int h) { | |
| 224 DrawStringInt(text, font, color, x, y, w, h, | |
| 225 gfx::Canvas::DefaultCanvasTextAlignment()); | |
| 226 } | |
| 227 | |
| 228 void Canvas::DrawStringInt(const std::wstring& text, | |
| 229 const gfx::Font& font, | |
| 230 const SkColor& color, | |
| 231 const gfx::Rect& display_rect) { | |
| 232 DrawStringInt(text, font, color, display_rect.x(), display_rect.y(), | |
| 233 display_rect.width(), display_rect.height()); | |
| 234 } | |
| 235 | |
| 236 void Canvas::TileImageInt(const SkBitmap& bitmap, int x, int y, int w, int h) { | |
| 237 TileImageInt(bitmap, 0, 0, x, y, w, h); | |
| 238 } | |
| 239 | |
| 240 void Canvas::TileImageInt(const SkBitmap& bitmap, int src_x, int src_y, | |
| 241 int dest_x, int dest_y, int w, int h) { | |
| 242 if (!IntersectsClipRectInt(dest_x, dest_y, w, h)) | |
| 243 return; | |
| 244 | |
| 245 SkPaint paint; | |
| 246 | |
| 247 SkShader* shader = SkShader::CreateBitmapShader(bitmap, | |
| 248 SkShader::kRepeat_TileMode, | |
| 249 SkShader::kRepeat_TileMode); | |
| 250 paint.setShader(shader); | |
| 251 paint.setXfermodeMode(SkXfermode::kSrcOver_Mode); | |
| 252 | |
| 253 // CreateBitmapShader returns a Shader with a reference count of one, we | |
| 254 // need to unref after paint takes ownership of the shader. | |
| 255 shader->unref(); | |
| 256 save(); | |
| 257 translate(SkIntToScalar(dest_x - src_x), SkIntToScalar(dest_y - src_y)); | |
| 258 ClipRectInt(src_x, src_y, w, h); | |
| 259 drawPaint(paint); | |
| 260 restore(); | |
| 261 } | |
| 262 | |
| 263 SkBitmap Canvas::ExtractBitmap() const { | |
| 264 const SkBitmap& device_bitmap = getDevice()->accessBitmap(false); | |
| 265 | |
| 266 // Make a bitmap to return, and a canvas to draw into it. We don't just want | |
| 267 // to call extractSubset or the copy constuctor, since we want an actual copy | |
| 268 // of the bitmap. | |
| 269 SkBitmap result; | |
| 270 device_bitmap.copyTo(&result, SkBitmap::kARGB_8888_Config); | |
| 271 return result; | |
| 272 } | |
| 273 | |
| 274 Canvas* Canvas::AsCanvas() { | |
| 275 return this; | |
| 276 } | |
| 277 | |
| 278 // static | |
| 279 int Canvas::DefaultCanvasTextAlignment() { | |
| 280 if (!base::i18n::IsRTL()) | |
| 281 return gfx::Canvas::TEXT_ALIGN_LEFT; | |
| 282 return gfx::Canvas::TEXT_ALIGN_RIGHT; | |
| 283 } | |
| 284 | |
| 285 //////////////////////////////////////////////////////////////////////////////// | |
| 286 // Canvas2, public: | |
| 287 | |
| 288 Canvas2* Canvas2::CreateCanvas() { | |
| 289 return new Canvas; | |
| 290 } | |
| 291 | |
| 292 Canvas2* Canvas2::CreateCanvas(int width, int height, bool is_opaque) { | |
| 293 return new Canvas(width, height, is_opaque); | |
| 294 } | |
| 295 | |
| 296 #if defined(OS_WIN) | |
| 297 // TODO(beng): move to canvas_win.cc, etc. | |
| 298 class CanvasPaintWin : public CanvasPaint, public CanvasPaint2 { | |
| 299 public: | |
| 300 CanvasPaintWin(gfx::NativeView view) : CanvasPaint(view) {} | |
| 301 | |
| 302 // Overridden from CanvasPaint2: | |
| 303 virtual bool IsValid() const { | |
| 304 return isEmpty(); | |
| 305 } | |
| 306 | |
| 307 virtual gfx::Rect GetInvalidRect() const { | |
| 308 return gfx::Rect(paintStruct().rcPaint); | |
| 309 } | |
| 310 | |
| 311 virtual Canvas2* AsCanvas2() { | |
| 312 return this; | |
| 313 } | |
| 314 }; | |
| 315 #endif | |
| 316 | |
| 317 CanvasPaint2* CanvasPaint2::CreateCanvasPaint(gfx::NativeView view) { | |
| 318 #if defined(OS_WIN) | |
| 319 return new CanvasPaintWin(view); | |
| 320 #else | |
| 321 return NULL; | |
| 322 #endif | |
| 323 } | |
| 324 | |
| 325 } // namespace gfx | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2862025:
Canvas refactoring part 2.... (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/