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1 /* | |
2 * Copyright (c) 2008, Google Inc. All rights reserved. | |
3 * | |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
29 */ | |
30 | |
31 #include "config.h" | |
32 #include "platform/fonts/win/SkiaFontWin.h" | |
33 | |
34 #include "platform/fonts/SimpleFontData.h" | |
35 #include "platform/fonts/win/FontPlatformDataWin.h" | |
36 #include "platform/graphics/Gradient.h" | |
37 #include "platform/graphics/GraphicsContext.h" | |
38 #include "platform/graphics/Pattern.h" | |
39 #include "platform/transforms/AffineTransform.h" | |
40 #include "third_party/skia/include/core/SkCanvas.h" | |
41 #include "third_party/skia/include/core/SkDevice.h" | |
42 #include "third_party/skia/include/core/SkPaint.h" | |
43 #include "third_party/skia/include/core/SkShader.h" | |
44 #include "third_party/skia/include/core/SkTemplates.h" | |
45 #include "wtf/RefPtr.h" | |
46 | |
47 namespace WebCore { | |
48 | |
49 static void skiaDrawText(GraphicsContext* context, | |
50 const SkPoint& point, | |
51 const SkRect& textRect, | |
52 SkPaint* paint, | |
53 const WORD* glyphs, | |
54 const int* advances, | |
55 const GOFFSET* offsets, | |
56 unsigned numGlyphs) | |
57 { | |
58 // Reserve space for 64 SkPoints on the stack. If numGlyphs is larger, the a
rray | |
59 // will dynamically allocate it space for numGlyph glyphs. This is used to s
tore | |
60 // the computed x,y locations. In the case where offsets==null, then we use
it | |
61 // to store (twice as many) SkScalars for x[] | |
62 static const size_t kLocalGlyphMax = 64; | |
63 | |
64 SkScalar x = point.fX; | |
65 SkScalar y = point.fY; | |
66 if (offsets) { | |
67 SkAutoSTArray<kLocalGlyphMax, SkPoint> storage(numGlyphs); | |
68 SkPoint* pos = storage.get(); | |
69 for (unsigned i = 0; i < numGlyphs; i++) { | |
70 // GDI has dv go up, so we negate it | |
71 pos[i].set(x + SkIntToScalar(offsets[i].du), y + -SkIntToScalar(offs
ets[i].dv)); | |
72 x += SkIntToScalar(advances[i]); | |
73 } | |
74 context->drawPosText(glyphs, numGlyphs * sizeof(uint16_t), pos, textRect
, *paint); | |
75 } else { | |
76 SkAutoSTArray<kLocalGlyphMax * 2, SkScalar> storage(numGlyphs); | |
77 SkScalar* xpos = storage.get(); | |
78 for (unsigned i = 0; i < numGlyphs; i++) { | |
79 xpos[i] = x; | |
80 x += SkIntToScalar(advances[i]); | |
81 } | |
82 context->drawPosTextH(glyphs, numGlyphs * sizeof(uint16_t), xpos, y, tex
tRect, *paint); | |
83 } | |
84 } | |
85 | |
86 void paintSkiaText(GraphicsContext* context, | |
87 const FontPlatformData& data, | |
88 unsigned numGlyphs, | |
89 const WORD* glyphs, | |
90 const int* advances, | |
91 const GOFFSET* offsets, | |
92 const SkPoint& origin, | |
93 const SkRect& textRect) | |
94 { | |
95 TextDrawingModeFlags textMode = context->textDrawingMode(); | |
96 | |
97 // Filling (if necessary). This is the common case. | |
98 SkPaint paint; | |
99 context->setupPaintForFilling(&paint); | |
100 paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); | |
101 data.setupPaint(&paint, context); | |
102 | |
103 bool didFill = false; | |
104 | |
105 if ((textMode & TextModeFill) && (SkColorGetA(paint.getColor()) || paint.get
Looper())) { | |
106 skiaDrawText(context, origin, textRect, &paint, &glyphs[0], &advances[0]
, &offsets[0], numGlyphs); | |
107 didFill = true; | |
108 } | |
109 | |
110 // Stroking on top (if necessary). | |
111 if ((textMode & TextModeStroke) | |
112 && context->strokeStyle() != NoStroke | |
113 && context->strokeThickness() > 0) { | |
114 | |
115 paint.reset(); | |
116 context->setupPaintForStroking(&paint); | |
117 paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); | |
118 data.setupPaint(&paint, context); | |
119 | |
120 if (didFill) { | |
121 // If there is a shadow and we filled above, there will already be | |
122 // a shadow. We don't want to draw it again or it will be too dark | |
123 // and it will go on top of the fill. | |
124 // | |
125 // Note that this isn't strictly correct, since the stroke could be | |
126 // very thick and the shadow wouldn't account for this. The "right" | |
127 // thing would be to draw to a new layer and then draw that layer | |
128 // with a shadow. But this is a lot of extra work for something | |
129 // that isn't normally an issue. | |
130 paint.setLooper(0); | |
131 } | |
132 | |
133 skiaDrawText(context, origin, textRect, &paint, &glyphs[0], &advances[0]
, &offsets[0], numGlyphs); | |
134 } | |
135 } | |
136 | |
137 } // namespace WebCore | |
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