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
39 // Touch ring border width. This is doubled if the ring is not pressed
40 #define RING_BORDER_WIDTH 1
41
GLExtras()42 GLExtras::GLExtras()
43 : m_drawExtra(0)
44 , m_visibleContentRect()
45 {
46 }
47
~GLExtras()48 GLExtras::~GLExtras()
49 {
50 }
51
drawRing(SkRect & srcRect,Color color,const TransformationMatrix * drawMat)52 void GLExtras::drawRing(SkRect& srcRect, Color color, const TransformationMatrix* drawMat)
53 {
54 if (srcRect.fRight <= srcRect.fLeft || srcRect.fBottom <= srcRect.fTop) {
55 // Invalid rect, reject it
56 return;
57 }
58 ALOGV("drawQuad [%fx%f, %f, %f]", srcRect.fLeft, srcRect.fTop,
59 srcRect.width(), srcRect.height());
60 // Pull the alpha out of the color so that the shader applies it correctly.
61 // Otherwise we either don't have blending enabled, or the alpha will get
62 // double applied
63 Color colorWithoutAlpha(0xFF000000 | color.rgb());
64 float alpha = color.alpha() / (float) 255;
65
66 PureColorQuadData data(colorWithoutAlpha, drawMat ? LayerQuad : BaseQuad,
67 drawMat, &srcRect, alpha, false);
68 TilesManager::instance()->shader()->drawQuad(&data);
69 }
70
drawRegion(const SkRegion & region,bool fill,bool drawBorder,const TransformationMatrix * drawMat,Color color)71 void GLExtras::drawRegion(const SkRegion& region, bool fill, bool drawBorder,
72 const TransformationMatrix* drawMat, Color color)
73 {
74 if (region.isEmpty())
75 return;
76 if (fill) {
77 SkRegion::Iterator rgnIter(region);
78 while (!rgnIter.done()) {
79 const SkIRect& ir = rgnIter.rect();
80 SkRect r;
81 r.set(ir.fLeft, ir.fTop, ir.fRight, ir.fBottom);
82 drawRing(r, color, drawMat);
83 rgnIter.next();
84 }
85 }
86 if (fill && !drawBorder)
87 return;
88 SkPath path;
89 if (!region.getBoundaryPath(&path))
90 return;
91 SkPath::Iter iter(path, true);
92 SkPath::Verb verb;
93 SkPoint pts[4];
94 SkRegion clip;
95 SkIRect startRect;
96 while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
97 if (verb == SkPath::kLine_Verb) {
98 SkRect r;
99 r.set(pts, 2);
100 SkIRect line;
101 int borderWidth = RING_BORDER_WIDTH;
102 if (!fill)
103 borderWidth *= 2;
104 line.fLeft = r.fLeft - borderWidth;
105 line.fRight = r.fRight + borderWidth;
106 line.fTop = r.fTop - borderWidth;
107 line.fBottom = r.fBottom + borderWidth;
108 if (clip.intersects(line)) {
109 clip.op(line, SkRegion::kReverseDifference_Op);
110 if (clip.isEmpty())
111 continue; // Nothing to draw, continue
112 line = clip.getBounds();
113 if (SkIRect::Intersects(startRect, line)) {
114 clip.op(startRect, SkRegion::kDifference_Op);
115 if (clip.isEmpty())
116 continue; // Nothing to draw, continue
117 line = clip.getBounds();
118 }
119 } else {
120 clip.setRect(line);
121 }
122 r.set(line.fLeft, line.fTop, line.fRight, line.fBottom);
123 drawRing(r, color, drawMat);
124 if (startRect.isEmpty()) {
125 startRect.set(line.fLeft, line.fTop, line.fRight, line.fBottom);
126 }
127 }
128 if (verb == SkPath::kMove_Verb) {
129 startRect.setEmpty();
130 }
131 }
132 }
133
drawGL(const LayerAndroid * layer)134 void GLExtras::drawGL(const LayerAndroid* layer)
135 {
136 if (m_drawExtra)
137 m_drawExtra->drawGL(this, layer);
138 }
139