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| 1 // Copyright (c) 2010 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_skia.h" | |
| 6 | |
| 7 #include <limits> | |
| 8 | |
| 9 #include "base/i18n/rtl.h" | |
| 10 #include "base/logging.h" | |
| 11 #include "gfx/brush.h" | |
| 12 #include "gfx/font.h" | |
| 13 #include "gfx/rect.h" | |
| 14 #include "third_party/skia/include/effects/SkGradientShader.h" | |
| 15 | |
| 16 #if defined(OS_WIN) | |
| 17 #include "gfx/canvas_skia_paint.h" | |
| 18 #endif | |
| 19 | |
| 20 namespace { | |
| 21 | |
| 22 // A platform wrapper for a Skia shader that makes sure the underlying | |
| 23 // SkShader object is unref'ed when this object is destroyed. | |
| 24 class SkiaShader : public gfx::Brush { | |
| 25 public: | |
| 26 explicit SkiaShader(SkShader* shader) : shader_(shader) { | |
| 27 } | |
| 28 virtual ~SkiaShader() { | |
| 29 shader_->unref(); | |
| 30 } | |
| 31 | |
| 32 // Accessor for shader, so it can be associated with a SkPaint. | |
| 33 SkShader* shader() const { return shader_; } | |
| 34 | |
| 35 private: | |
| 36 SkShader* shader_; | |
| 37 | |
| 38 DISALLOW_COPY_AND_ASSIGN(SkiaShader); | |
| 39 }; | |
| 40 | |
| 41 | |
| 42 } // namespace | |
| 43 | |
| 44 namespace gfx { | |
| 45 | |
| 46 //////////////////////////////////////////////////////////////////////////////// | |
| 47 // CanvasSkia, public: | |
| 48 | |
| 49 // static | |
| 50 int CanvasSkia::DefaultCanvasTextAlignment() { | |
| 51 if (!base::i18n::IsRTL()) | |
| 52 return gfx::Canvas::TEXT_ALIGN_LEFT; | |
| 53 return gfx::Canvas::TEXT_ALIGN_RIGHT; | |
| 54 } | |
| 55 | |
| 56 SkBitmap CanvasSkia::ExtractBitmap() const { | |
| 57 const SkBitmap& device_bitmap = getDevice()->accessBitmap(false); | |
| 58 | |
| 59 // Make a bitmap to return, and a canvas to draw into it. We don't just want | |
| 60 // to call extractSubset or the copy constructor, since we want an actual copy | |
| 61 // of the bitmap. | |
| 62 SkBitmap result; | |
| 63 device_bitmap.copyTo(&result, SkBitmap::kARGB_8888_Config); | |
| 64 return result; | |
| 65 } | |
| 66 | |
| 67 //////////////////////////////////////////////////////////////////////////////// | |
| 68 // CanvasSkia, Canvas implementation: | |
| 69 | |
| 70 void CanvasSkia::Save() { | |
| 71 save(); | |
| 72 } | |
| 73 | |
| 74 void CanvasSkia::SaveLayerAlpha(uint8 alpha) { | |
| 75 saveLayerAlpha(NULL, alpha); | |
| 76 } | |
| 77 | |
| 78 | |
| 79 void CanvasSkia::SaveLayerAlpha(uint8 alpha, const gfx::Rect& layer_bounds) { | |
| 80 SkRect bounds; | |
| 81 bounds.set(SkIntToScalar(layer_bounds.x()), | |
| 82 SkIntToScalar(layer_bounds.y()), | |
| 83 SkIntToScalar(layer_bounds.right()), | |
| 84 SkIntToScalar(layer_bounds.bottom())); | |
| 85 saveLayerAlpha(&bounds, alpha); | |
| 86 } | |
| 87 | |
| 88 void CanvasSkia::Restore() { | |
| 89 restore(); | |
| 90 } | |
| 91 | |
| 92 bool CanvasSkia::ClipRectInt(int x, int y, int w, int h) { | |
| 93 SkRect new_clip; | |
| 94 new_clip.set(SkIntToScalar(x), SkIntToScalar(y), | |
| 95 SkIntToScalar(x + w), SkIntToScalar(y + h)); | |
| 96 return clipRect(new_clip); | |
| 97 } | |
| 98 | |
| 99 void CanvasSkia::TranslateInt(int x, int y) { | |
| 100 translate(SkIntToScalar(x), SkIntToScalar(y)); | |
| 101 } | |
| 102 | |
| 103 void CanvasSkia::ScaleInt(int x, int y) { | |
| 104 scale(SkIntToScalar(x), SkIntToScalar(y)); | |
| 105 } | |
| 106 | |
| 107 void CanvasSkia::FillRectInt(const SkColor& color, int x, int y, int w, int h) { | |
| 108 FillRectInt(color, x, y, w, h, SkXfermode::kSrcOver_Mode); | |
| 109 } | |
| 110 | |
| 111 void CanvasSkia::FillRectInt(const SkColor& color, | |
| 112 int x, int y, int w, int h, | |
| 113 SkXfermode::Mode mode) { | |
| 114 SkPaint paint; | |
| 115 paint.setColor(color); | |
| 116 paint.setStyle(SkPaint::kFill_Style); | |
| 117 paint.setXfermodeMode(mode); | |
| 118 DrawRectInt(x, y, w, h, paint); | |
| 119 } | |
| 120 | |
| 121 void CanvasSkia::FillRectInt(const gfx::Brush* brush, | |
| 122 int x, int y, int w, int h) { | |
| 123 const SkiaShader* shader = static_cast<const SkiaShader*>(brush); | |
| 124 SkPaint paint; | |
| 125 paint.setShader(shader->shader()); | |
| 126 // TODO(beng): set shader transform to match canvas transform. | |
| 127 DrawRectInt(x, y, w, h, paint); | |
| 128 } | |
| 129 | |
| 130 void CanvasSkia::DrawRectInt(const SkColor& color, int x, int y, int w, int h) { | |
| 131 DrawRectInt(color, x, y, w, h, SkXfermode::kSrcOver_Mode); | |
| 132 } | |
| 133 | |
| 134 void CanvasSkia::DrawRectInt(const SkColor& color, | |
| 135 int x, int y, int w, int h, | |
| 136 SkXfermode::Mode mode) { | |
| 137 SkPaint paint; | |
| 138 paint.setColor(color); | |
| 139 paint.setStyle(SkPaint::kStroke_Style); | |
| 140 // Set a stroke width of 0, which will put us down the stroke rect path. If | |
| 141 // we set a stroke width of 1, for example, this will internally create a | |
| 142 // path and fill it, which causes problems near the edge of the canvas. | |
| 143 paint.setStrokeWidth(SkIntToScalar(0)); | |
| 144 paint.setXfermodeMode(mode); | |
| 145 | |
| 146 DrawRectInt(x, y, w, h, paint); | |
| 147 } | |
| 148 | |
| 149 void CanvasSkia::DrawRectInt(int x, int y, int w, int h, const SkPaint& paint) { | |
| 150 SkIRect rc = { x, y, x + w, y + h }; | |
| 151 drawIRect(rc, paint); | |
| 152 } | |
| 153 | |
| 154 void CanvasSkia::DrawLineInt(const SkColor& color, | |
| 155 int x1, int y1, | |
| 156 int x2, int y2) { | |
| 157 SkPaint paint; | |
| 158 paint.setColor(color); | |
| 159 paint.setStrokeWidth(SkIntToScalar(1)); | |
| 160 drawLine(SkIntToScalar(x1), SkIntToScalar(y1), SkIntToScalar(x2), | |
| 161 SkIntToScalar(y2), paint); | |
| 162 } | |
| 163 | |
| 164 void CanvasSkia::DrawFocusRect(int x, int y, int width, int height) { | |
| 165 // Create a 2D bitmap containing alternating on/off pixels - we do this | |
| 166 // so that you never get two pixels of the same color around the edges | |
| 167 // of the focus rect (this may mean that opposing edges of the rect may | |
| 168 // have a dot pattern out of phase to each other). | |
| 169 static SkBitmap* dots = NULL; | |
| 170 if (!dots) { | |
| 171 int col_pixels = 32; | |
| 172 int row_pixels = 32; | |
| 173 | |
| 174 dots = new SkBitmap; | |
| 175 dots->setConfig(SkBitmap::kARGB_8888_Config, col_pixels, row_pixels); | |
| 176 dots->allocPixels(); | |
| 177 dots->eraseARGB(0, 0, 0, 0); | |
| 178 | |
| 179 uint32_t* dot = dots->getAddr32(0, 0); | |
| 180 for (int i = 0; i < row_pixels; i++) { | |
| 181 for (int u = 0; u < col_pixels; u++) { | |
| 182 if ((u % 2 + i % 2) % 2 != 0) { | |
| 183 dot[i * row_pixels + u] = SK_ColorGRAY; | |
| 184 } | |
| 185 } | |
| 186 } | |
| 187 } | |
| 188 | |
| 189 // First the horizontal lines. | |
| 190 | |
| 191 // Make a shader for the bitmap with an origin of the box we'll draw. This | |
| 192 // shader is refcounted and will have an initial refcount of 1. | |
| 193 SkShader* shader = SkShader::CreateBitmapShader( | |
| 194 *dots, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); | |
| 195 // Assign the shader to the paint & release our reference. The paint will | |
| 196 // now own the shader and the shader will be destroyed when the paint goes | |
| 197 // out of scope. | |
| 198 SkPaint paint; | |
| 199 paint.setShader(shader); | |
| 200 shader->unref(); | |
| 201 | |
| 202 DrawRectInt(x, y, width, 1, paint); | |
| 203 DrawRectInt(x, y + height - 1, width, 1, paint); | |
| 204 DrawRectInt(x, y, 1, height, paint); | |
| 205 DrawRectInt(x + width - 1, y, 1, height, paint); | |
| 206 } | |
| 207 | |
| 208 void CanvasSkia::DrawBitmapInt(const SkBitmap& bitmap, int x, int y) { | |
| 209 drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y)); | |
| 210 } | |
| 211 | |
| 212 void CanvasSkia::DrawBitmapInt(const SkBitmap& bitmap, | |
| 213 int x, int y, | |
| 214 const SkPaint& paint) { | |
| 215 drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y), &paint); | |
| 216 } | |
| 217 | |
| 218 void CanvasSkia::DrawBitmapInt(const SkBitmap& bitmap, | |
| 219 int src_x, int src_y, int src_w, int src_h, | |
| 220 int dest_x, int dest_y, int dest_w, int dest_h, | |
| 221 bool filter) { | |
| 222 SkPaint p; | |
| 223 DrawBitmapInt(bitmap, src_x, src_y, src_w, src_h, dest_x, dest_y, | |
| 224 dest_w, dest_h, filter, p); | |
| 225 } | |
| 226 | |
| 227 void CanvasSkia::DrawBitmapInt(const SkBitmap& bitmap, | |
| 228 int src_x, int src_y, int src_w, int src_h, | |
| 229 int dest_x, int dest_y, int dest_w, int dest_h, | |
| 230 bool filter, | |
| 231 const SkPaint& paint) { | |
| 232 DLOG_ASSERT(src_x + src_w < std::numeric_limits<int16_t>::max() && | |
| 233 src_y + src_h < std::numeric_limits<int16_t>::max()); | |
| 234 if (src_w <= 0 || src_h <= 0 || dest_w <= 0 || dest_h <= 0) { | |
| 235 NOTREACHED() << "Attempting to draw bitmap to/from an empty rect!"; | |
| 236 return; | |
| 237 } | |
| 238 | |
| 239 if (!IntersectsClipRectInt(dest_x, dest_y, dest_w, dest_h)) | |
| 240 return; | |
| 241 | |
| 242 SkRect dest_rect = { SkIntToScalar(dest_x), | |
| 243 SkIntToScalar(dest_y), | |
| 244 SkIntToScalar(dest_x + dest_w), | |
| 245 SkIntToScalar(dest_y + dest_h) }; | |
| 246 | |
| 247 if (src_w == dest_w && src_h == dest_h) { | |
| 248 // Workaround for apparent bug in Skia that causes image to occasionally | |
| 249 // shift. | |
| 250 SkIRect src_rect = { src_x, src_y, src_x + src_w, src_y + src_h }; | |
| 251 drawBitmapRect(bitmap, &src_rect, dest_rect, &paint); | |
| 252 return; | |
| 253 } | |
| 254 | |
| 255 // Make a bitmap shader that contains the bitmap we want to draw. This is | |
| 256 // basically what SkCanvas.drawBitmap does internally, but it gives us | |
| 257 // more control over quality and will use the mipmap in the source image if | |
| 258 // it has one, whereas drawBitmap won't. | |
| 259 SkShader* shader = SkShader::CreateBitmapShader(bitmap, | |
| 260 SkShader::kRepeat_TileMode, | |
| 261 SkShader::kRepeat_TileMode); | |
| 262 SkMatrix shader_scale; | |
| 263 shader_scale.setScale(SkFloatToScalar(static_cast<float>(dest_w) / src_w), | |
| 264 SkFloatToScalar(static_cast<float>(dest_h) / src_h)); | |
| 265 shader_scale.preTranslate(SkIntToScalar(-src_x), SkIntToScalar(-src_y)); | |
| 266 shader_scale.postTranslate(SkIntToScalar(dest_x), SkIntToScalar(dest_y)); | |
| 267 shader->setLocalMatrix(shader_scale); | |
| 268 | |
| 269 // Set up our paint to use the shader & release our reference (now just owned | |
| 270 // by the paint). | |
| 271 SkPaint p(paint); | |
| 272 p.setFilterBitmap(filter); | |
| 273 p.setShader(shader); | |
| 274 shader->unref(); | |
| 275 | |
| 276 // The rect will be filled by the bitmap. | |
| 277 drawRect(dest_rect, p); | |
| 278 } | |
| 279 | |
| 280 void CanvasSkia::DrawStringInt(const string16& text, | |
| 281 const gfx::Font& font, | |
| 282 const SkColor& color, | |
| 283 int x, int y, int w, int h) { | |
| 284 DrawStringInt(text, font, color, x, y, w, h, | |
| 285 gfx::CanvasSkia::DefaultCanvasTextAlignment()); | |
| 286 } | |
| 287 | |
| 288 void CanvasSkia::DrawStringInt(const string16& text, | |
| 289 const gfx::Font& font, | |
| 290 const SkColor& color, | |
| 291 const gfx::Rect& display_rect) { | |
| 292 DrawStringInt(text, font, color, display_rect.x(), display_rect.y(), | |
| 293 display_rect.width(), display_rect.height()); | |
| 294 } | |
| 295 | |
| 296 void CanvasSkia::TileImageInt(const SkBitmap& bitmap, | |
| 297 int x, int y, int w, int h) { | |
| 298 TileImageInt(bitmap, 0, 0, x, y, w, h); | |
| 299 } | |
| 300 | |
| 301 void CanvasSkia::TileImageInt(const SkBitmap& bitmap, | |
| 302 int src_x, int src_y, | |
| 303 int dest_x, int dest_y, int w, int h) { | |
| 304 if (!IntersectsClipRectInt(dest_x, dest_y, w, h)) | |
| 305 return; | |
| 306 | |
| 307 SkPaint paint; | |
| 308 | |
| 309 SkShader* shader = SkShader::CreateBitmapShader(bitmap, | |
| 310 SkShader::kRepeat_TileMode, | |
| 311 SkShader::kRepeat_TileMode); | |
| 312 paint.setShader(shader); | |
| 313 paint.setXfermodeMode(SkXfermode::kSrcOver_Mode); | |
| 314 | |
| 315 // CreateBitmapShader returns a Shader with a reference count of one, we | |
| 316 // need to unref after paint takes ownership of the shader. | |
| 317 shader->unref(); | |
| 318 save(); | |
| 319 translate(SkIntToScalar(dest_x - src_x), SkIntToScalar(dest_y - src_y)); | |
| 320 ClipRectInt(src_x, src_y, w, h); | |
| 321 drawPaint(paint); | |
| 322 restore(); | |
| 323 } | |
| 324 | |
| 325 gfx::NativeDrawingContext CanvasSkia::BeginPlatformPaint() { | |
| 326 return beginPlatformPaint(); | |
| 327 } | |
| 328 | |
| 329 void CanvasSkia::EndPlatformPaint() { | |
| 330 endPlatformPaint(); | |
| 331 } | |
| 332 | |
| 333 CanvasSkia* CanvasSkia::AsCanvasSkia() { | |
| 334 return this; | |
| 335 } | |
| 336 | |
| 337 const CanvasSkia* CanvasSkia::AsCanvasSkia() const { | |
| 338 return this; | |
| 339 } | |
| 340 | |
| 341 //////////////////////////////////////////////////////////////////////////////// | |
| 342 // CanvasSkia, private: | |
| 343 | |
| 344 bool CanvasSkia::IntersectsClipRectInt(int x, int y, int w, int h) { | |
| 345 SkRect clip; | |
| 346 return getClipBounds(&clip) && | |
| 347 clip.intersect(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(x + w), | |
| 348 SkIntToScalar(y + h)); | |
| 349 } | |
| 350 | |
| 351 //////////////////////////////////////////////////////////////////////////////// | |
| 352 // Canvas, public: | |
| 353 | |
| 354 Canvas* Canvas::CreateCanvas() { | |
| 355 return new CanvasSkia; | |
| 356 } | |
| 357 | |
| 358 Canvas* Canvas::CreateCanvas(int width, int height, bool is_opaque) { | |
| 359 return new CanvasSkia(width, height, is_opaque); | |
| 360 } | |
| 361 | |
| 362 #if defined(OS_WIN) | |
| 363 // TODO(beng): move to canvas_win.cc, etc. | |
| 364 class CanvasPaintWin : public CanvasSkiaPaint, public CanvasPaint { | |
| 365 public: | |
| 366 CanvasPaintWin(gfx::NativeView view) : CanvasSkiaPaint(view) {} | |
| 367 | |
| 368 // Overridden from CanvasPaint2: | |
| 369 virtual bool IsValid() const { | |
| 370 return isEmpty(); | |
| 371 } | |
| 372 | |
| 373 virtual gfx::Rect GetInvalidRect() const { | |
| 374 return gfx::Rect(paintStruct().rcPaint); | |
| 375 } | |
| 376 | |
| 377 virtual Canvas* AsCanvas() { | |
| 378 return this; | |
| 379 } | |
| 380 }; | |
| 381 #endif | |
| 382 | |
| 383 CanvasPaint* CanvasPaint::CreateCanvasPaint(gfx::NativeView view) { | |
| 384 #if defined(OS_WIN) | |
| 385 return new CanvasPaintWin(view); | |
| 386 #else | |
| 387 return NULL; | |
| 388 #endif | |
| 389 } | |
| 390 | |
| 391 } // namespace gfx | |
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Chromium Code Reviews
Issue 6246027:
Move src/gfx/ to src/ui/gfx... (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/