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reed@google.comed3ee642012-02-14 16:12:49 +00001/*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "gm.h"
9#include "SkCanvas.h"
10#include "SkPath.h"
11#include "SkGradientShader.h"
12#include "SkTypeface.h"
13
14static SkShader* make_heatGradient(const SkPoint pts[2]) {
caryclark@google.com13130862012-06-06 12:10:45 +000015#if 0 // UNUSED
reed@google.comed3ee642012-02-14 16:12:49 +000016 const SkColor colors[] = {
17 SK_ColorBLACK, SK_ColorBLUE, SK_ColorCYAN, SK_ColorGREEN,
18 SK_ColorYELLOW, SK_ColorRED, SK_ColorWHITE
19 };
caryclark@google.com13130862012-06-06 12:10:45 +000020#endif
reed@google.comed3ee642012-02-14 16:12:49 +000021 const SkColor bw[] = { SK_ColorBLACK, SK_ColorWHITE };
22
23 return SkGradientShader::CreateLinear(pts, bw, NULL,
24 SK_ARRAY_COUNT(bw),
25 SkShader::kClamp_TileMode);
26}
27
28static bool setFont(SkPaint* paint, const char name[]) {
29 SkTypeface* tf = SkTypeface::CreateFromName(name, SkTypeface::kNormal);
30 if (tf) {
31 paint->setTypeface(tf)->unref();
32 return true;
33 }
reed@google.comce151d02012-03-08 16:10:57 +000034 return false;
reed@google.comed3ee642012-02-14 16:12:49 +000035}
36
37#ifdef SK_BUILD_FOR_MAC
38#import <ApplicationServices/ApplicationServices.h>
39#define BITMAP_INFO_RGB (kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host)
40
41static CGContextRef makeCG(const SkBitmap& bm) {
42 if (SkBitmap::kARGB_8888_Config != bm.config() ||
43 NULL == bm.getPixels()) {
44 return NULL;
45 }
46 CGColorSpaceRef space = CGColorSpaceCreateDeviceRGB();
47 CGContextRef cg = CGBitmapContextCreate(bm.getPixels(), bm.width(), bm.height(),
48 8, bm.rowBytes(), space, BITMAP_INFO_RGB);
49 CFRelease(space);
scroggo@google.com19c28942012-08-01 20:53:33 +000050
reed@google.comed3ee642012-02-14 16:12:49 +000051 CGContextSetAllowsFontSubpixelQuantization(cg, false);
52 CGContextSetShouldSubpixelQuantizeFonts(cg, false);
rmistry@google.comd6176b02012-08-23 18:14:13 +000053
reed@google.comed3ee642012-02-14 16:12:49 +000054 return cg;
55}
56
57extern CTFontRef SkTypeface_GetCTFontRef(const SkTypeface* face);
58
59static CGFontRef typefaceToCGFont(const SkTypeface* face) {
60 if (NULL == face) {
61 return 0;
62 }
63
64 CTFontRef ct = SkTypeface_GetCTFontRef(face);
65 return CTFontCopyGraphicsFont(ct, NULL);
66}
67
68static void cgSetPaintForText(CGContextRef cg, const SkPaint& paint) {
69 SkColor c = paint.getColor();
70 CGFloat rgba[] = {
caryclark@google.com13130862012-06-06 12:10:45 +000071 SkColorGetB(c) / 255.0f,
72 SkColorGetG(c) / 255.0f,
73 SkColorGetR(c) / 255.0f,
74 SkColorGetA(c) / 255.0f,
reed@google.comed3ee642012-02-14 16:12:49 +000075 };
76 CGContextSetRGBFillColor(cg, rgba[0], rgba[1], rgba[2], rgba[3]);
77
78 CGContextSetTextDrawingMode(cg, kCGTextFill);
79 CGContextSetFont(cg, typefaceToCGFont(paint.getTypeface()));
80 CGContextSetFontSize(cg, SkScalarToFloat(paint.getTextSize()));
81
82 CGContextSetAllowsFontSubpixelPositioning(cg, paint.isSubpixelText());
83 CGContextSetShouldSubpixelPositionFonts(cg, paint.isSubpixelText());
rmistry@google.comd6176b02012-08-23 18:14:13 +000084
reed@google.comed3ee642012-02-14 16:12:49 +000085 CGContextSetShouldAntialias(cg, paint.isAntiAlias());
86 CGContextSetShouldSmoothFonts(cg, paint.isLCDRenderText());
87}
88
89static void cgDrawText(CGContextRef cg, const void* text, size_t len,
90 float x, float y, const SkPaint& paint) {
91 if (cg) {
92 cgSetPaintForText(cg, paint);
93
94 uint16_t glyphs[200];
95 int count = paint.textToGlyphs(text, len, glyphs);
96
97 CGContextShowGlyphsAtPoint(cg, x, y, glyphs, count);
98 }
99}
100#endif
101
102namespace skiagm {
103
104/**
105 Test a set of clipping problems discovered while writing blitAntiRect,
106 and test all the code paths through the clipping blitters.
107 Each region should show as a blue center surrounded by a 2px green
108 border, with no red.
109*/
rmistry@google.comd6176b02012-08-23 18:14:13 +0000110
reed@google.comed3ee642012-02-14 16:12:49 +0000111#define HEIGHT 480
112
113class GammaTextGM : public GM {
114public:
115 GammaTextGM() {
116
117 }
118
119protected:
120 virtual SkString onShortName() {
121 return SkString("gammatext");
122 }
123
124 virtual SkISize onISize() {
125 return make_isize(1024, HEIGHT);
126 }
127
128 static void drawGrad(SkCanvas* canvas) {
vandebo@chromium.orgc39c8672012-04-17 21:46:18 +0000129 SkPoint pts[] = { { 0, 0 }, { 0, SkIntToScalar(HEIGHT) } };
reed@google.comed3ee642012-02-14 16:12:49 +0000130#if 0
131 const SkColor colors[] = { SK_ColorBLACK, SK_ColorWHITE };
132 SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
133#else
134 SkShader* s = make_heatGradient(pts);
135#endif
rmistry@google.comd6176b02012-08-23 18:14:13 +0000136
reed@google.comed3ee642012-02-14 16:12:49 +0000137 canvas->clear(SK_ColorRED);
138 SkPaint paint;
139 paint.setShader(s)->unref();
vandebo@chromium.orgc39c8672012-04-17 21:46:18 +0000140 SkRect r = { 0, 0, SkIntToScalar(1024), SkIntToScalar(HEIGHT) };
reed@google.comed3ee642012-02-14 16:12:49 +0000141 canvas->drawRect(r, paint);
142 }
143
144 virtual void onDraw(SkCanvas* canvas) {
145#ifdef SK_BUILD_FOR_MAC
146 CGContextRef cg = makeCG(canvas->getDevice()->accessBitmap(false));
147#endif
rmistry@google.comd6176b02012-08-23 18:14:13 +0000148
reed@google.comed3ee642012-02-14 16:12:49 +0000149 drawGrad(canvas);
150
151 const SkColor fg[] = {
152 0xFFFFFFFF,
153 0xFFFFFF00, 0xFFFF00FF, 0xFF00FFFF,
154 0xFFFF0000, 0xFF00FF00, 0xFF0000FF,
155 0xFF000000,
156 };
rmistry@google.comd6176b02012-08-23 18:14:13 +0000157
reed@google.comed3ee642012-02-14 16:12:49 +0000158 const char* text = "Hamburgefons";
159 size_t len = strlen(text);
160
161 SkPaint paint;
162 setFont(&paint, "Times");
163 paint.setTextSize(SkIntToScalar(16));
164 paint.setAntiAlias(true);
165 paint.setLCDRenderText(true);
166
vandebo@chromium.orgc39c8672012-04-17 21:46:18 +0000167 SkScalar x = SkIntToScalar(10);
reed@google.comed3ee642012-02-14 16:12:49 +0000168 for (size_t i = 0; i < SK_ARRAY_COUNT(fg); ++i) {
169 paint.setColor(fg[i]);
rmistry@google.comd6176b02012-08-23 18:14:13 +0000170
vandebo@chromium.orgc39c8672012-04-17 21:46:18 +0000171 SkScalar y = SkIntToScalar(40);
172 SkScalar stopy = SkIntToScalar(HEIGHT);
reed@google.comed3ee642012-02-14 16:12:49 +0000173 while (y < stopy) {
caryclark@google.com13130862012-06-06 12:10:45 +0000174 if (true) {
175 canvas->drawText(text, len, x, y, paint);
rmistry@google.comd6176b02012-08-23 18:14:13 +0000176 }
caryclark@google.com13130862012-06-06 12:10:45 +0000177#ifdef SK_BUILD_FOR_MAC
178 else {
179 cgDrawText(cg, text, len, SkScalarToFloat(x),
180 static_cast<float>(HEIGHT) - SkScalarToFloat(y),
181 paint);
182 }
reed@google.comed3ee642012-02-14 16:12:49 +0000183#endif
184 y += paint.getTextSize() * 2;
185 }
186 x += SkIntToScalar(1024) / SK_ARRAY_COUNT(fg);
187 }
scroggo@google.com19c28942012-08-01 20:53:33 +0000188#ifdef SK_BUILD_FOR_MAC
189 CGContextRelease(cg);
190#endif
reed@google.comed3ee642012-02-14 16:12:49 +0000191 }
192
193private:
194 typedef GM INHERITED;
195};
196
197//////////////////////////////////////////////////////////////////////////////
198
199static GM* MyFactory(void*) { return new GammaTextGM; }
200static GMRegistry reg(MyFactory);
201
202}