1 /*
2 * Copyright 2011, The Android Open Source Project
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #define LOG_TAG "GLExtras"
27 #define LOG_NDEBUG 1
28
29 #include "config.h"
30
31 #include "AndroidLog.h"
32 #include "DrawExtra.h"
33 #include "DrawQuadData.h"
34 #include "GLExtras.h"
35 #include "IntRect.h"
36 #include "SkPath.h"
37 #include "TilesManager.h"
38 #include "android_graphics.h"
39
40 // Touch ring border width. This is doubled if the ring is not pressed
41 #define RING_BORDER_WIDTH 1
42
GLExtras()43 GLExtras::GLExtras()
44 : m_drawExtra(0)
45 , m_visibleContentRect()
46 {
47 }
48
~GLExtras()49 GLExtras::~GLExtras()
50 {
51 }
52
drawRing(SkRect & srcRect,Color color,const TransformationMatrix * drawMat)53 void GLExtras::drawRing(SkRect& srcRect, Color color, const TransformationMatrix* drawMat)
54 {
55 if (srcRect.fRight <= srcRect.fLeft || srcRect.fBottom <= srcRect.fTop) {
56 // Invalid rect, reject it
57 return;
58 }
59 ALOGV("drawQuad [%fx%f, %f, %f]", srcRect.fLeft, srcRect.fTop,
60 srcRect.width(), srcRect.height());
61 // Pull the alpha out of the color so that the shader applies it correctly.
62 // Otherwise we either don't have blending enabled, or the alpha will get
63 // double applied
64 Color colorWithoutAlpha(0xFF000000 | color.rgb());
65 float alpha = color.alpha() / (float) 255;
66
67 PureColorQuadData data(colorWithoutAlpha, drawMat ? LayerQuad : BaseQuad,
68 drawMat, &srcRect, alpha, false);
69 TilesManager::instance()->shader()->drawQuad(&data);
70 }
71
drawRegion(const SkRegion & region,bool fill,bool drawBorder,const TransformationMatrix * drawMat,Color color)72 void GLExtras::drawRegion(const SkRegion& region, bool fill, bool drawBorder,
73 const TransformationMatrix* drawMat, Color color)
74 {
75 if (region.isEmpty())
76 return;
77 if (fill) {
78 SkRegion::Iterator rgnIter(region);
79 while (!rgnIter.done()) {
80 const SkIRect& ir = rgnIter.rect();
81 SkRect r;
82 r.set(ir.fLeft, ir.fTop, ir.fRight, ir.fBottom);
83 drawRing(r, color, drawMat);
84 rgnIter.next();
85 }
86 }
87 if (fill && !drawBorder)
88 return;
89 SkPath path;
90 if (!region.getBoundaryPath(&path))
91 return;
92 SkPath::Iter iter(path, true);
93 SkPath::Verb verb;
94 SkPoint pts[4];
95 SkRegion clip;
96 SkIRect startRect;
97 while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
98 if (verb == SkPath::kLine_Verb) {
99 SkRect r;
100 r.set(pts, 2);
101 SkIRect line;
102 int borderWidth = RING_BORDER_WIDTH;
103 if (!fill)
104 borderWidth *= 2;
105 line.fLeft = r.fLeft - borderWidth;
106 line.fRight = r.fRight + borderWidth;
107 line.fTop = r.fTop - borderWidth;
108 line.fBottom = r.fBottom + borderWidth;
109 if (clip.intersects(line)) {
110 clip.op(line, SkRegion::kReverseDifference_Op);
111 if (clip.isEmpty())
112 continue; // Nothing to draw, continue
113 line = clip.getBounds();
114 if (SkIRect::Intersects(startRect, line)) {
115 clip.op(startRect, SkRegion::kDifference_Op);
116 if (clip.isEmpty())
117 continue; // Nothing to draw, continue
118 line = clip.getBounds();
119 }
120 } else {
121 clip.setRect(line);
122 }
123 r.set(line.fLeft, line.fTop, line.fRight, line.fBottom);
124 drawRing(r, color, drawMat);
125 if (startRect.isEmpty()) {
126 startRect.set(line.fLeft, line.fTop, line.fRight, line.fBottom);
127 }
128 }
129 if (verb == SkPath::kMove_Verb) {
130 startRect.setEmpty();
131 }
132 }
133 }
134
drawGL(const LayerAndroid * layer)135 void GLExtras::drawGL(const LayerAndroid* layer)
136 {
137 if (m_drawExtra)
138 m_drawExtra->drawGL(this, layer);
139 }
140