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/*
* Copyright 2019 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontStyle.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkPaint.h"
#include "include/core/SkScalar.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include <string.h>
#include <initializer_list>
#ifdef SK_BUILD_FOR_MAC
#include "include/core/SkSurface.h"
#import <ApplicationServices/ApplicationServices.h>
static void std_cg_setup(CGContextRef ctx) {
CGContextSetAllowsFontSubpixelQuantization(ctx, false);
CGContextSetShouldSubpixelQuantizeFonts(ctx, false);
// Because CG always draws from the horizontal baseline,
// if there is a non-integral translation from the horizontal origin to the vertical origin,
// then CG cannot draw the glyph in the correct location without subpixel positioning.
CGContextSetAllowsFontSubpixelPositioning(ctx, true);
CGContextSetShouldSubpixelPositionFonts(ctx, true);
CGContextSetAllowsFontSmoothing(ctx, true);
CGContextSetShouldAntialias(ctx, true);
CGContextSetTextDrawingMode(ctx, kCGTextFill);
// Draw black on white to create mask. (Special path exists to speed this up in CG.)
CGContextSetGrayFillColor(ctx, 0.0f, 1.0f);
}
static CGContextRef make_cg_ctx(const SkPixmap& pm) {
CGBitmapInfo info;
CGColorSpaceRef cs;
switch (pm.colorType()) {
case kRGBA_8888_SkColorType:
info = kCGBitmapByteOrder32Host | (CGBitmapInfo)kCGImageAlphaNoneSkipFirst;
cs = CGColorSpaceCreateDeviceRGB();
break;
case kGray_8_SkColorType:
info = kCGImageAlphaNone;
cs = CGColorSpaceCreateDeviceGray();
break;
case kAlpha_8_SkColorType:
info = kCGImageAlphaOnly;
cs = nullptr;
break;
default:
return nullptr;
}
auto ctx = CGBitmapContextCreate(pm.writable_addr(), pm.width(), pm.height(), 8, pm.rowBytes(),
cs, info);
std_cg_setup(ctx);
return ctx;
}
static void test_mac_fonts(SkCanvas* canvas, SkScalar size, SkScalar xpos) {
int w = 32;
int h = 32;
canvas->scale(10, 10);
SkScalar y = 1;
for (SkColorType ct : {kRGBA_8888_SkColorType, kGray_8_SkColorType, kAlpha_8_SkColorType}) {
SkImageInfo ii = SkImageInfo::Make(w, h, ct, kPremul_SkAlphaType);
auto surf = SkSurface::MakeRaster(ii);
SkPixmap pm;
surf->peekPixels(&pm);
CGContextRef ctx = make_cg_ctx(pm);
CGContextSelectFont(ctx, "Times", size, kCGEncodingMacRoman);
SkScalar x = 1;
for (bool smooth : {false, true}) {
surf->getCanvas()->clear(ct == kAlpha_8_SkColorType ? 0 : 0xFFFFFFFF);
CGContextSetShouldSmoothFonts(ctx, smooth);
CGContextShowTextAtPoint(ctx, 2 + xpos, 2, "A", 1);
surf->draw(canvas, x, y);
x += pm.width();
}
y += pm.height();
}
}
class MacAAFontsGM : public skiagm::GM {
SkScalar fSize = 16;
SkScalar fXPos = 0;
public:
MacAAFontsGM() {}
~MacAAFontsGM() override {}
protected:
DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
test_mac_fonts(canvas, fSize, fXPos);
return DrawResult::kOk;
}
SkISize onISize() override { return { 1024, 768 }; }
SkString onShortName() override { return SkString("macaatest"); }
bool onChar(SkUnichar uni) override {
switch (uni) {
case 'i': fSize += 1; return true;
case 'k': fSize -= 1; return true;
case 'j': fXPos -= 1.0f/16; return true;
case 'l': fXPos += 1.0f/16; return true;
default: break;
}
return false;
}
};
DEF_GM(return new MacAAFontsGM;)
#endif
DEF_SIMPLE_GM(macaa_colors, canvas, 800, 500) {
const SkColor GRAY = 0xFF808080;
const SkColor colors[] = {
SK_ColorBLACK, SK_ColorWHITE,
SK_ColorBLACK, GRAY,
SK_ColorWHITE, SK_ColorBLACK,
SK_ColorWHITE, GRAY,
};
const SkScalar sizes[] = {10, 12, 15, 18, 24};
const SkScalar width = 200;
const SkScalar height = 500;
const char str[] = "Hamburgefons";
const size_t len = strlen(str);
SkFont font;
font.setTypeface(SkTypeface::MakeFromName("Times", SkFontStyle()));
for (size_t i = 0; i < std::size(colors); i += 2) {
canvas->save();
SkPaint paint;
paint.setColor(colors[i+1]);
canvas->drawRect({0, 0, width, height}, paint);
paint.setColor(colors[i]);
SkScalar y = 10;
SkScalar x = 10;
for (SkScalar ps : sizes) {
font.setSize(ps);
for (bool lcd : {false, true}) {
font.setEdging(lcd ? SkFont::Edging::kSubpixelAntiAlias
: SkFont::Edging::kAntiAlias);
for (auto h : {SkFontHinting::kNone, SkFontHinting::kNormal}) {
font.setHinting(h);
y += font.getSpacing() + 2;
canvas->drawSimpleText(str, len, SkTextEncoding::kUTF8, x, y, font, paint);
}
}
y += 8;
}
canvas->restore();
canvas->translate(width, 0);
}
}