1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkCanvas.h"
#include "SkPath.h"
#include "SkGradientShader.h"
#include "SkTypeface.h"
static SkShader* make_heatGradient(const SkPoint pts[2]) {
#if 0 // UNUSED
const SkColor colors[] = {
SK_ColorBLACK, SK_ColorBLUE, SK_ColorCYAN, SK_ColorGREEN,
SK_ColorYELLOW, SK_ColorRED, SK_ColorWHITE
};
#endif
const SkColor bw[] = { SK_ColorBLACK, SK_ColorWHITE };
return SkGradientShader::CreateLinear(pts, bw, NULL,
SK_ARRAY_COUNT(bw),
SkShader::kClamp_TileMode);
}
static bool setFont(SkPaint* paint, const char name[]) {
SkTypeface* tf = SkTypeface::CreateFromName(name, SkTypeface::kNormal);
if (tf) {
paint->setTypeface(tf)->unref();
return true;
}
return false;
}
#ifdef SK_BUILD_FOR_MAC
#import <ApplicationServices/ApplicationServices.h>
#define BITMAP_INFO_RGB (kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host)
static CGContextRef makeCG(const SkImageInfo& info, const void* addr,
size_t rowBytes) {
if (kPMColor_SkColorType != info.colorType() || NULL == addr) {
return NULL;
}
CGColorSpaceRef space = CGColorSpaceCreateDeviceRGB();
CGContextRef cg = CGBitmapContextCreate((void*)addr, info.width(), info.height(),
8, rowBytes, space, BITMAP_INFO_RGB);
CFRelease(space);
CGContextSetAllowsFontSubpixelQuantization(cg, false);
CGContextSetShouldSubpixelQuantizeFonts(cg, false);
return cg;
}
extern CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face);
static CGFontRef typefaceToCGFont(const SkTypeface* face) {
if (NULL == face) {
return 0;
}
CTFontRef ct = SkTypeface_GetCTFontRef(face);
return CTFontCopyGraphicsFont(ct, NULL);
}
static void cgSetPaintForText(CGContextRef cg, const SkPaint& paint) {
SkColor c = paint.getColor();
CGFloat rgba[] = {
SkColorGetB(c) / 255.0f,
SkColorGetG(c) / 255.0f,
SkColorGetR(c) / 255.0f,
SkColorGetA(c) / 255.0f,
};
CGContextSetRGBFillColor(cg, rgba[0], rgba[1], rgba[2], rgba[3]);
CGContextSetTextDrawingMode(cg, kCGTextFill);
CGContextSetFont(cg, typefaceToCGFont(paint.getTypeface()));
CGContextSetFontSize(cg, SkScalarToFloat(paint.getTextSize()));
CGContextSetAllowsFontSubpixelPositioning(cg, paint.isSubpixelText());
CGContextSetShouldSubpixelPositionFonts(cg, paint.isSubpixelText());
CGContextSetShouldAntialias(cg, paint.isAntiAlias());
CGContextSetShouldSmoothFonts(cg, paint.isLCDRenderText());
}
static void cgDrawText(CGContextRef cg, const void* text, size_t len,
float x, float y, const SkPaint& paint) {
if (cg) {
cgSetPaintForText(cg, paint);
uint16_t glyphs[200];
int count = paint.textToGlyphs(text, len, glyphs);
CGContextShowGlyphsAtPoint(cg, x, y, glyphs, count);
}
}
#endif
namespace skiagm {
/**
Test a set of clipping problems discovered while writing blitAntiRect,
and test all the code paths through the clipping blitters.
Each region should show as a blue center surrounded by a 2px green
border, with no red.
*/
#define HEIGHT 480
class GammaTextGM : public GM {
public:
GammaTextGM() {
}
protected:
virtual SkString onShortName() {
return SkString("gammatext");
}
virtual SkISize onISize() {
return make_isize(1024, HEIGHT);
}
static void drawGrad(SkCanvas* canvas) {
SkPoint pts[] = { { 0, 0 }, { 0, SkIntToScalar(HEIGHT) } };
#if 0
const SkColor colors[] = { SK_ColorBLACK, SK_ColorWHITE };
SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
#else
SkShader* s = make_heatGradient(pts);
#endif
canvas->clear(SK_ColorRED);
SkPaint paint;
paint.setShader(s)->unref();
SkRect r = { 0, 0, SkIntToScalar(1024), SkIntToScalar(HEIGHT) };
canvas->drawRect(r, paint);
}
virtual void onDraw(SkCanvas* canvas) {
#ifdef SK_BUILD_FOR_MAC
CGContextRef cg = 0;
{
SkImageInfo info;
size_t rowBytes;
const void* addr = canvas->peekPixels(&info, &rowBytes);
if (addr) {
cg = makeCG(info, addr, rowBytes);
}
}
#endif
drawGrad(canvas);
const SkColor fg[] = {
0xFFFFFFFF,
0xFFFFFF00, 0xFFFF00FF, 0xFF00FFFF,
0xFFFF0000, 0xFF00FF00, 0xFF0000FF,
0xFF000000,
};
const char* text = "Hamburgefons";
size_t len = strlen(text);
SkPaint paint;
setFont(&paint, "Times");
paint.setTextSize(SkIntToScalar(16));
paint.setAntiAlias(true);
paint.setLCDRenderText(true);
SkScalar x = SkIntToScalar(10);
for (size_t i = 0; i < SK_ARRAY_COUNT(fg); ++i) {
paint.setColor(fg[i]);
SkScalar y = SkIntToScalar(40);
SkScalar stopy = SkIntToScalar(HEIGHT);
while (y < stopy) {
if (true) {
canvas->drawText(text, len, x, y, paint);
}
#ifdef SK_BUILD_FOR_MAC
else {
cgDrawText(cg, text, len, SkScalarToFloat(x),
static_cast<float>(HEIGHT) - SkScalarToFloat(y),
paint);
}
#endif
y += paint.getTextSize() * 2;
}
x += SkIntToScalar(1024) / SK_ARRAY_COUNT(fg);
}
#ifdef SK_BUILD_FOR_MAC
CGContextRelease(cg);
#endif
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new GammaTextGM; }
static GMRegistry reg(MyFactory);
}
|
