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| 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 "app/gfx/canvas.h" | |
| 6 | |
| 7 #include <limits> | |
| 8 | |
| 9 #include "app/gfx/font.h" | |
| 10 #include "base/i18n/rtl.h" | |
| 11 #include "base/logging.h" | |
| 12 #include "gfx/rect.h" | |
| 13 #include "third_party/skia/include/core/SkShader.h" | |
| 14 | |
| 15 namespace gfx { | |
| 16 | |
| 17 bool Canvas::GetClipRect(gfx::Rect* r) { | |
| 18 SkRect clip; | |
| 19 if (!getClipBounds(&clip)) { | |
| 20 if (r) | |
| 21 r->SetRect(0, 0, 0, 0); | |
| 22 return false; | |
| 23 } | |
| 24 r->SetRect(SkScalarRound(clip.fLeft), SkScalarRound(clip.fTop), | |
| 25 SkScalarRound(clip.fRight - clip.fLeft), | |
| 26 SkScalarRound(clip.fBottom - clip.fTop)); | |
| 27 return true; | |
| 28 } | |
| 29 | |
| 30 bool Canvas::ClipRectInt(int x, int y, int w, int h) { | |
| 31 SkRect new_clip; | |
| 32 new_clip.set(SkIntToScalar(x), SkIntToScalar(y), | |
| 33 SkIntToScalar(x + w), SkIntToScalar(y + h)); | |
| 34 return clipRect(new_clip); | |
| 35 } | |
| 36 | |
| 37 bool Canvas::IntersectsClipRectInt(int x, int y, int w, int h) { | |
| 38 SkRect clip; | |
| 39 return getClipBounds(&clip) && | |
| 40 clip.intersect(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(x + w), | |
| 41 SkIntToScalar(y + h)); | |
| 42 } | |
| 43 | |
| 44 void Canvas::TranslateInt(int x, int y) { | |
| 45 translate(SkIntToScalar(x), SkIntToScalar(y)); | |
| 46 } | |
| 47 | |
| 48 void Canvas::ScaleInt(int x, int y) { | |
| 49 scale(SkIntToScalar(x), SkIntToScalar(y)); | |
| 50 } | |
| 51 | |
| 52 void Canvas::FillRectInt(const SkColor& color, int x, int y, int w, int h) { | |
| 53 SkPaint paint; | |
| 54 paint.setColor(color); | |
| 55 paint.setStyle(SkPaint::kFill_Style); | |
| 56 paint.setXfermodeMode(SkXfermode::kSrcOver_Mode); | |
| 57 FillRectInt(x, y, w, h, paint); | |
| 58 } | |
| 59 | |
| 60 void Canvas::FillRectInt(int x, int y, int w, int h, const SkPaint& paint) { | |
| 61 SkIRect rc = {x, y, x + w, y + h}; | |
| 62 drawIRect(rc, paint); | |
| 63 } | |
| 64 | |
| 65 void Canvas::DrawRectInt(const SkColor& color, int x, int y, int w, int h) { | |
| 66 DrawRectInt(color, x, y, w, h, SkXfermode::kSrcOver_Mode); | |
| 67 } | |
| 68 | |
| 69 void Canvas::DrawRectInt(const SkColor& color, int x, int y, int w, int h, | |
| 70 SkXfermode::Mode mode) { | |
| 71 SkPaint paint; | |
| 72 paint.setColor(color); | |
| 73 paint.setStyle(SkPaint::kStroke_Style); | |
| 74 // Set a stroke width of 0, which will put us down the stroke rect path. If | |
| 75 // we set a stroke width of 1, for example, this will internally create a | |
| 76 // path and fill it, which causes problems near the edge of the canvas. | |
| 77 paint.setStrokeWidth(SkIntToScalar(0)); | |
| 78 paint.setXfermodeMode(mode); | |
| 79 | |
| 80 SkIRect rc = {x, y, x + w, y + h}; | |
| 81 drawIRect(rc, paint); | |
| 82 } | |
| 83 | |
| 84 void Canvas::DrawLineInt(const SkColor& color, int x1, int y1, int x2, int y2) { | |
| 85 SkPaint paint; | |
| 86 paint.setColor(color); | |
| 87 paint.setStrokeWidth(SkIntToScalar(1)); | |
| 88 drawLine(SkIntToScalar(x1), SkIntToScalar(y1), SkIntToScalar(x2), | |
| 89 SkIntToScalar(y2), paint); | |
| 90 } | |
| 91 | |
| 92 void Canvas::DrawFocusRect(int x, int y, int width, int height) { | |
| 93 // Create a 2D bitmap containing alternating on/off pixels - we do this | |
| 94 // so that you never get two pixels of the same color around the edges | |
| 95 // of the focus rect (this may mean that opposing edges of the rect may | |
| 96 // have a dot pattern out of phase to each other). | |
| 97 static SkBitmap* dots = NULL; | |
| 98 if (!dots) { | |
| 99 int col_pixels = 32; | |
| 100 int row_pixels = 32; | |
| 101 | |
| 102 dots = new SkBitmap; | |
| 103 dots->setConfig(SkBitmap::kARGB_8888_Config, col_pixels, row_pixels); | |
| 104 dots->allocPixels(); | |
| 105 dots->eraseARGB(0, 0, 0, 0); | |
| 106 | |
| 107 uint32_t* dot = dots->getAddr32(0, 0); | |
| 108 for (int i = 0; i < row_pixels; i++) { | |
| 109 for (int u = 0; u < col_pixels; u++) { | |
| 110 if ((u % 2 + i % 2) % 2 != 0) { | |
| 111 dot[i * row_pixels + u] = SK_ColorGRAY; | |
| 112 } | |
| 113 } | |
| 114 } | |
| 115 } | |
| 116 | |
| 117 // First the horizontal lines. | |
| 118 | |
| 119 // Make a shader for the bitmap with an origin of the box we'll draw. This | |
| 120 // shader is refcounted and will have an initial refcount of 1. | |
| 121 SkShader* shader = SkShader::CreateBitmapShader( | |
| 122 *dots, SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode); | |
| 123 // Assign the shader to the paint & release our reference. The paint will | |
| 124 // now own the shader and the shader will be destroyed when the paint goes | |
| 125 // out of scope. | |
| 126 SkPaint paint; | |
| 127 paint.setShader(shader); | |
| 128 shader->unref(); | |
| 129 | |
| 130 SkRect rect; | |
| 131 rect.set(SkIntToScalar(x), SkIntToScalar(y), | |
| 132 SkIntToScalar(x + width), SkIntToScalar(y + 1)); | |
| 133 drawRect(rect, paint); | |
| 134 rect.set(SkIntToScalar(x), SkIntToScalar(y + height - 1), | |
| 135 SkIntToScalar(x + width), SkIntToScalar(y + height)); | |
| 136 drawRect(rect, paint); | |
| 137 | |
| 138 rect.set(SkIntToScalar(x), SkIntToScalar(y), | |
| 139 SkIntToScalar(x + 1), SkIntToScalar(y + height)); | |
| 140 drawRect(rect, paint); | |
| 141 rect.set(SkIntToScalar(x + width - 1), SkIntToScalar(y), | |
| 142 SkIntToScalar(x + width), SkIntToScalar(y + height)); | |
| 143 drawRect(rect, paint); | |
| 144 } | |
| 145 | |
| 146 void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int x, int y) { | |
| 147 drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y)); | |
| 148 } | |
| 149 | |
| 150 void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int x, int y, | |
| 151 const SkPaint& paint) { | |
| 152 drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y), &paint); | |
| 153 } | |
| 154 | |
| 155 void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int src_x, int src_y, | |
| 156 int src_w, int src_h, int dest_x, int dest_y, | |
| 157 int dest_w, int dest_h, | |
| 158 bool filter) { | |
| 159 SkPaint p; | |
| 160 DrawBitmapInt(bitmap, src_x, src_y, src_w, src_h, dest_x, dest_y, | |
| 161 dest_w, dest_h, filter, p); | |
| 162 } | |
| 163 | |
| 164 void Canvas::DrawBitmapInt(const SkBitmap& bitmap, int src_x, int src_y, | |
| 165 int src_w, int src_h, int dest_x, int dest_y, | |
| 166 int dest_w, int dest_h, | |
| 167 bool filter, const SkPaint& paint) { | |
| 168 DLOG_ASSERT(src_x + src_w < std::numeric_limits<int16_t>::max() && | |
| 169 src_y + src_h < std::numeric_limits<int16_t>::max()); | |
| 170 if (src_w <= 0 || src_h <= 0 || dest_w <= 0 || dest_h <= 0) { | |
| 171 NOTREACHED() << "Attempting to draw bitmap to/from an empty rect!"; | |
| 172 return; | |
| 173 } | |
| 174 | |
| 175 if (!IntersectsClipRectInt(dest_x, dest_y, dest_w, dest_h)) | |
| 176 return; | |
| 177 | |
| 178 SkRect dest_rect = { SkIntToScalar(dest_x), | |
| 179 SkIntToScalar(dest_y), | |
| 180 SkIntToScalar(dest_x + dest_w), | |
| 181 SkIntToScalar(dest_y + dest_h) }; | |
| 182 | |
| 183 if (src_w == dest_w && src_h == dest_h) { | |
| 184 // Workaround for apparent bug in Skia that causes image to occasionally | |
| 185 // shift. | |
| 186 SkIRect src_rect = { src_x, src_y, src_x + src_w, src_y + src_h }; | |
| 187 drawBitmapRect(bitmap, &src_rect, dest_rect, &paint); | |
| 188 return; | |
| 189 } | |
| 190 | |
| 191 // Make a bitmap shader that contains the bitmap we want to draw. This is | |
| 192 // basically what SkCanvas.drawBitmap does internally, but it gives us | |
| 193 // more control over quality and will use the mipmap in the source image if | |
| 194 // it has one, whereas drawBitmap won't. | |
| 195 SkShader* shader = SkShader::CreateBitmapShader(bitmap, | |
| 196 SkShader::kRepeat_TileMode, | |
| 197 SkShader::kRepeat_TileMode); | |
| 198 SkMatrix shader_scale; | |
| 199 shader_scale.setScale(SkFloatToScalar(static_cast<float>(dest_w) / src_w), | |
| 200 SkFloatToScalar(static_cast<float>(dest_h) / src_h)); | |
| 201 shader_scale.preTranslate(SkIntToScalar(-src_x), SkIntToScalar(-src_y)); | |
| 202 shader_scale.postTranslate(SkIntToScalar(dest_x), SkIntToScalar(dest_y)); | |
| 203 shader->setLocalMatrix(shader_scale); | |
| 204 | |
| 205 // Set up our paint to use the shader & release our reference (now just owned | |
| 206 // by the paint). | |
| 207 SkPaint p(paint); | |
| 208 p.setFilterBitmap(filter); | |
| 209 p.setShader(shader); | |
| 210 shader->unref(); | |
| 211 | |
| 212 // The rect will be filled by the bitmap. | |
| 213 drawRect(dest_rect, p); | |
| 214 } | |
| 215 | |
| 216 void Canvas::DrawStringInt(const std::wstring& text, | |
| 217 const gfx::Font& font, | |
| 218 const SkColor& color, | |
| 219 int x, int y, int w, int h) { | |
| 220 DrawStringInt(text, font, color, x, y, w, h, | |
| 221 gfx::Canvas::DefaultCanvasTextAlignment()); | |
| 222 } | |
| 223 | |
| 224 void Canvas::DrawStringInt(const std::wstring& text, | |
| 225 const gfx::Font& font, | |
| 226 const SkColor& color, | |
| 227 const gfx::Rect& display_rect) { | |
| 228 DrawStringInt(text, font, color, display_rect.x(), display_rect.y(), | |
| 229 display_rect.width(), display_rect.height()); | |
| 230 } | |
| 231 | |
| 232 void Canvas::TileImageInt(const SkBitmap& bitmap, int x, int y, int w, int h) { | |
| 233 TileImageInt(bitmap, 0, 0, x, y, w, h); | |
| 234 } | |
| 235 | |
| 236 void Canvas::TileImageInt(const SkBitmap& bitmap, int src_x, int src_y, | |
| 237 int dest_x, int dest_y, int w, int h) { | |
| 238 if (!IntersectsClipRectInt(dest_x, dest_y, w, h)) | |
| 239 return; | |
| 240 | |
| 241 SkPaint paint; | |
| 242 | |
| 243 SkShader* shader = SkShader::CreateBitmapShader(bitmap, | |
| 244 SkShader::kRepeat_TileMode, | |
| 245 SkShader::kRepeat_TileMode); | |
| 246 paint.setShader(shader); | |
| 247 paint.setXfermodeMode(SkXfermode::kSrcOver_Mode); | |
| 248 | |
| 249 // CreateBitmapShader returns a Shader with a reference count of one, we | |
| 250 // need to unref after paint takes ownership of the shader. | |
| 251 shader->unref(); | |
| 252 save(); | |
| 253 translate(SkIntToScalar(dest_x - src_x), SkIntToScalar(dest_y - src_y)); | |
| 254 ClipRectInt(src_x, src_y, w, h); | |
| 255 drawPaint(paint); | |
| 256 restore(); | |
| 257 } | |
| 258 | |
| 259 SkBitmap Canvas::ExtractBitmap() const { | |
| 260 const SkBitmap& device_bitmap = getDevice()->accessBitmap(false); | |
| 261 | |
| 262 // Make a bitmap to return, and a canvas to draw into it. We don't just want | |
| 263 // to call extractSubset or the copy constuctor, since we want an actual copy | |
| 264 // of the bitmap. | |
| 265 SkBitmap result; | |
| 266 device_bitmap.copyTo(&result, SkBitmap::kARGB_8888_Config); | |
| 267 return result; | |
| 268 } | |
| 269 | |
| 270 // static | |
| 271 int Canvas::DefaultCanvasTextAlignment() { | |
| 272 if (!base::i18n::IsRTL()) | |
| 273 return gfx::Canvas::TEXT_ALIGN_LEFT; | |
| 274 return gfx::Canvas::TEXT_ALIGN_RIGHT; | |
| 275 } | |
| 276 | |
| 277 } // namespace gfx | |
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Chromium Code Reviews
Issue 1132006:
Move app/gfx/canvas and app/gfx/font to gfx/. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/