1
2/*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "SkParsePaint.h"
9#include "SkTSearch.h"
10#include "SkParse.h"
11#include "SkImageDecoder.h"
12#include "SkGradientShader.h"
13
14static SkShader* inflate_shader(const SkDOM& dom, const SkDOM::Node* node)
15{
16    if ((node = dom.getFirstChild(node, "shader")) == NULL)
17        return NULL;
18
19    const char* str;
20
21    if (dom.hasAttr(node, "type", "linear-gradient"))
22    {
23        SkColor        colors[2];
24        SkPoint        pts[2];
25
26        colors[0] = colors[1] = SK_ColorBLACK;    // need to initialized the alpha to opaque, since FindColor doesn't set it
27        if ((str = dom.findAttr(node, "c0")) != NULL &&
28            SkParse::FindColor(str, &colors[0]) &&
29            (str = dom.findAttr(node, "c1")) != NULL &&
30            SkParse::FindColor(str, &colors[1]) &&
31            dom.findScalars(node, "p0", &pts[0].fX, 2) &&
32            dom.findScalars(node, "p1", &pts[1].fX, 2))
33        {
34            SkShader::TileMode    mode = SkShader::kClamp_TileMode;
35            int                    index;
36
37            if ((index = dom.findList(node, "tile-mode", "clamp,repeat,mirror")) >= 0)
38                mode = (SkShader::TileMode)index;
39            return SkGradientShader::CreateLinear(pts, colors, NULL, 2, mode);
40        }
41    }
42    else if (dom.hasAttr(node, "type", "bitmap"))
43    {
44        if ((str = dom.findAttr(node, "src")) == NULL)
45            return NULL;
46
47        SkBitmap    bm;
48
49        if (SkImageDecoder::DecodeFile(str, &bm))
50        {
51            SkShader::TileMode    mode = SkShader::kRepeat_TileMode;
52            int                    index;
53
54            if ((index = dom.findList(node, "tile-mode", "clamp,repeat,mirror")) >= 0)
55                mode = (SkShader::TileMode)index;
56
57            return SkShader::CreateBitmapShader(bm, mode, mode);
58        }
59    }
60    return NULL;
61}
62
63void SkPaint_Inflate(SkPaint* paint, const SkDOM& dom, const SkDOM::Node* node)
64{
65    SkASSERT(paint);
66    SkASSERT(&dom);
67    SkASSERT(node);
68
69    SkScalar x;
70
71    if (dom.findScalar(node, "stroke-width", &x))
72        paint->setStrokeWidth(x);
73    if (dom.findScalar(node, "text-size", &x))
74        paint->setTextSize(x);
75
76    bool    b;
77
78    SkASSERT("legacy: use is-stroke" && !dom.findBool(node, "is-frame", &b));
79
80    if (dom.findBool(node, "is-stroke", &b))
81        paint->setStyle(b ? SkPaint::kStroke_Style : SkPaint::kFill_Style);
82    if (dom.findBool(node, "is-antialias", &b))
83        paint->setAntiAlias(b);
84    if (dom.findBool(node, "is-lineartext", &b))
85        paint->setLinearText(b);
86
87    const char* str = dom.findAttr(node, "color");
88    if (str)
89    {
90        SkColor    c = paint->getColor();
91        if (SkParse::FindColor(str, &c))
92            paint->setColor(c);
93    }
94
95    // do this AFTER parsing for the color
96    if (dom.findScalar(node, "opacity", &x))
97    {
98        x = SkMaxScalar(0, SkMinScalar(x, SK_Scalar1));
99        paint->setAlpha(SkScalarRoundToInt(x * 255));
100    }
101
102    int    index = dom.findList(node, "text-anchor", "left,center,right");
103    if (index >= 0)
104        paint->setTextAlign((SkPaint::Align)index);
105
106    SkShader* shader = inflate_shader(dom, node);
107    if (shader)
108        paint->setShader(shader)->unref();
109}
110