/*
* Copyright 2013 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 "sk_tool_utils.h"
#include "SkCanvas.h"
#include "SkFontMgr.h"
#include "SkGraphics.h"
#include "SkTypeface.h"
// limit this just so we don't take too long to draw
#define MAX_FAMILIES 30
static SkScalar drawString(SkCanvas* canvas, const SkString& text, SkScalar x,
SkScalar y, const SkPaint& paint) {
canvas->drawString(text, x, y, paint);
return x + paint.measureText(text.c_str(), text.size());
}
static SkScalar drawCharacter(SkCanvas* canvas, uint32_t character, SkScalar x,
SkScalar y, SkPaint& paint, SkFontMgr* fm,
const char* fontName, const char* bcp47[], int bcp47Count,
const SkFontStyle& fontStyle) {
// find typeface containing the requested character and draw it
SkString ch;
ch.appendUnichar(character);
sk_sp<SkTypeface> typeface(fm->matchFamilyStyleCharacter(fontName, fontStyle,
bcp47, bcp47Count, character));
paint.setTypeface(typeface);
x = drawString(canvas, ch, x, y, paint) + 20;
if (nullptr == typeface) {
return x;
}
// repeat the process, but this time use the family name of the typeface
// from the first pass. This emulates the behavior in Blink where it
// it expects to get the same glyph when following this pattern.
SkString familyName;
typeface->getFamilyName(&familyName);
paint.setTypeface(fm->legacyMakeTypeface(familyName.c_str(), typeface->fontStyle()));
return drawString(canvas, ch, x, y, paint) + 20;
}
static const char* zh = "zh";
static const char* ja = "ja";
class FontMgrGM : public skiagm::GM {
public:
FontMgrGM() {
SkGraphics::SetFontCacheLimit(16 * 1024 * 1024);
fName.set("fontmgr_iter");
fFM = SkFontMgr::RefDefault();
fName.append(sk_tool_utils::platform_font_manager());
}
protected:
SkString onShortName() override {
return fName;
}
SkISize onISize() override {
return SkISize::Make(1536, 768);
}
void onDraw(SkCanvas* canvas) override {
SkScalar y = 20;
SkPaint paint;
paint.setAntiAlias(true);
paint.setLCDRenderText(true);
paint.setSubpixelText(true);
paint.setTextSize(17);
SkFontMgr* fm = fFM.get();
int count = SkMin32(fm->countFamilies(), MAX_FAMILIES);
for (int i = 0; i < count; ++i) {
SkString familyName;
fm->getFamilyName(i, &familyName);
paint.setTypeface(nullptr);
(void)drawString(canvas, familyName, 20, y, paint);
SkScalar x = 220;
sk_sp<SkFontStyleSet> set(fm->createStyleSet(i));
for (int j = 0; j < set->count(); ++j) {
SkString sname;
SkFontStyle fs;
set->getStyle(j, &fs, &sname);
sname.appendf(" [%d %d %d]", fs.weight(), fs.width(), fs.slant());
paint.setTypeface(sk_sp<SkTypeface>(set->createTypeface(j)));
x = drawString(canvas, sname, x, y, paint) + 20;
// check to see that we get different glyphs in japanese and chinese
x = drawCharacter(canvas, 0x5203, x, y, paint, fm, familyName.c_str(), &zh, 1, fs);
x = drawCharacter(canvas, 0x5203, x, y, paint, fm, familyName.c_str(), &ja, 1, fs);
// check that emoji characters are found
x = drawCharacter(canvas, 0x1f601, x, y, paint, fm, familyName.c_str(), nullptr,0, fs);
}
y += 24;
}
}
private:
sk_sp<SkFontMgr> fFM;
SkString fName;
typedef GM INHERITED;
};
class FontMgrMatchGM : public skiagm::GM {
sk_sp<SkFontMgr> fFM;
public:
FontMgrMatchGM() : fFM(SkFontMgr::RefDefault()) {
SkGraphics::SetFontCacheLimit(16 * 1024 * 1024);
}
protected:
SkString onShortName() override {
SkString name("fontmgr_match");
name.append(sk_tool_utils::platform_font_manager());
return name;
}
SkISize onISize() override {
return SkISize::Make(640, 1024);
}
void iterateFamily(SkCanvas* canvas, const SkPaint& paint,
SkFontStyleSet* fset) {
SkPaint p(paint);
SkScalar y = 0;
for (int j = 0; j < fset->count(); ++j) {
SkString sname;
SkFontStyle fs;
fset->getStyle(j, &fs, &sname);
sname.appendf(" [%d %d]", fs.weight(), fs.width());
p.setTypeface(sk_sp<SkTypeface>(fset->createTypeface(j)));
(void)drawString(canvas, sname, 0, y, p);
y += 24;
}
}
void exploreFamily(SkCanvas* canvas, const SkPaint& paint,
SkFontStyleSet* fset) {
SkPaint p(paint);
SkScalar y = 0;
for (int weight = 100; weight <= 900; weight += 200) {
for (int width = 1; width <= 9; width += 2) {
SkFontStyle fs(weight, width, SkFontStyle::kUpright_Slant);
sk_sp<SkTypeface> face(fset->matchStyle(fs));
if (face) {
SkString str;
str.printf("request [%d %d]", fs.weight(), fs.width());
p.setTypeface(std::move(face));
(void)drawString(canvas, str, 0, y, p);
y += 24;
}
}
}
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAntiAlias(true);
paint.setLCDRenderText(true);
paint.setSubpixelText(true);
paint.setTextSize(17);
const char* gNames[] = {
"Helvetica Neue", "Arial"
};
sk_sp<SkFontStyleSet> fset;
for (size_t i = 0; i < SK_ARRAY_COUNT(gNames); ++i) {
fset.reset(fFM->matchFamily(gNames[i]));
if (fset->count() > 0) {
break;
}
}
if (nullptr == fset.get()) {
return;
}
canvas->translate(20, 40);
this->exploreFamily(canvas, paint, fset.get());
canvas->translate(150, 0);
this->iterateFamily(canvas, paint, fset.get());
}
private:
typedef GM INHERITED;
};
class FontMgrBoundsGM : public skiagm::GM {
public:
FontMgrBoundsGM(double scale, double skew)
: fScaleX(SkDoubleToScalar(scale))
, fSkewX(SkDoubleToScalar(skew))
{
fName.set("fontmgr_bounds");
if (scale != 1 || skew != 0) {
fName.appendf("_%g_%g", scale, skew);
}
fName.append(sk_tool_utils::platform_font_manager());
fFM = SkFontMgr::RefDefault();
}
static void show_bounds(SkCanvas* canvas, const SkPaint& paint, SkScalar x, SkScalar y,
SkColor boundsColor)
{
SkPaint glyphPaint(paint);
SkRect fontBounds = glyphPaint.getFontBounds();
fontBounds.offset(x, y);
SkPaint boundsPaint(glyphPaint);
boundsPaint.setColor(boundsColor);
canvas->drawRect(fontBounds, boundsPaint);
SkPaint::FontMetrics fm;
glyphPaint.getFontMetrics(&fm);
SkPaint metricsPaint(boundsPaint);
metricsPaint.setStyle(SkPaint::kFill_Style);
metricsPaint.setAlpha(0x40);
if ((fm.fFlags & SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag) &&
(fm.fFlags & SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag))
{
SkRect underline{ fontBounds.fLeft, fm.fUnderlinePosition+y,
fontBounds.fRight, fm.fUnderlinePosition+y + fm.fUnderlineThickness };
canvas->drawRect(underline, metricsPaint);
}
if ((fm.fFlags & SkPaint::FontMetrics::kStrikeoutPositionIsValid_Flag) &&
(fm.fFlags & SkPaint::FontMetrics::kStrikeoutPositionIsValid_Flag))
{
SkRect strikeout{ fontBounds.fLeft, fm.fStrikeoutPosition+y - fm.fStrikeoutThickness,
fontBounds.fRight, fm.fStrikeoutPosition+y };
canvas->drawRect(strikeout, metricsPaint);
}
SkGlyphID left = 0, right = 0, top = 0, bottom = 0;
{
int numGlyphs = glyphPaint.getTypeface()->countGlyphs();
SkRect min = {0, 0, 0, 0};
glyphPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
for (int i = 0; i < numGlyphs; ++i) {
SkGlyphID glyphId = i;
SkRect cur;
glyphPaint.measureText(&glyphId, sizeof(glyphId), &cur);
if (cur.fLeft < min.fLeft ) { min.fLeft = cur.fLeft; left = i; }
if (cur.fTop < min.fTop ) { min.fTop = cur.fTop ; top = i; }
if (min.fRight < cur.fRight ) { min.fRight = cur.fRight; right = i; }
if (min.fBottom < cur.fBottom) { min.fBottom = cur.fBottom; bottom = i; }
}
}
SkGlyphID str[] = { left, right, top, bottom };
for (size_t i = 0; i < SK_ARRAY_COUNT(str); ++i) {
canvas->drawText(&str[i], sizeof(str[0]), x, y, glyphPaint);
}
}
protected:
SkString onShortName() override {
return fName;
}
SkISize onISize() override {
return SkISize::Make(1024, 850);
}
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
paint.setAntiAlias(true);
paint.setSubpixelText(true);
paint.setTextSize(100);
paint.setStyle(SkPaint::kStroke_Style);
paint.setTextScaleX(fScaleX);
paint.setTextSkewX(fSkewX);
const SkColor boundsColors[2] = { SK_ColorRED, SK_ColorBLUE };
SkFontMgr* fm = fFM.get();
int count = SkMin32(fm->countFamilies(), 32);
int index = 0;
SkScalar x = 0, y = 0;
canvas->translate(10, 120);
for (int i = 0; i < count; ++i) {
sk_sp<SkFontStyleSet> set(fm->createStyleSet(i));
for (int j = 0; j < set->count() && j < 3; ++j) {
paint.setTypeface(sk_sp<SkTypeface>(set->createTypeface(j)));
// Fonts with lots of glyphs are interesting, but can take a long time to find
// the glyphs which make up the maximum extent.
if (paint.getTypeface() && paint.getTypeface()->countGlyphs() < 1000) {
SkRect fontBounds = paint.getFontBounds();
x -= fontBounds.fLeft;
show_bounds(canvas, paint, x, y, boundsColors[index & 1]);
x += fontBounds.fRight + 20;
index += 1;
if (x > 900) {
x = 0;
y += 160;
}
if (y >= 700) {
return;
}
}
}
}
}
private:
sk_sp<SkFontMgr> fFM;
SkString fName;
SkScalar fScaleX, fSkewX;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
DEF_GM(return new FontMgrGM;)
DEF_GM(return new FontMgrMatchGM;)
DEF_GM(return new FontMgrBoundsGM(1.0, 0);)
DEF_GM(return new FontMgrBoundsGM(0.75, 0);)
DEF_GM(return new FontMgrBoundsGM(1.0, -0.25);)