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/*
* 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 (kN32_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 SkISize::Make(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);
}
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