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skia2/gm/fontmgr.cpp
Ben Wagner 7fde8e1728 IWYU for gms. 
This almost gets gms to be iwyu clean. The last bit is around gm.cpp
and the tracing framework and its use of atomic. Will also need a way
of keeping things from regressing, which is difficult due to needing to
do this outside-in.

Change-Id: I1393531e99da8b0f1a29f55c53c86d53f459af7d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211593
Reviewed-by: Herb Derby <herb@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2019-05-02 17:48:53 +00:00

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/*
* 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/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontMetrics.h"
#include "include/core/SkFontMgr.h"
#include "include/core/SkFontStyle.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkGraphics.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "src/core/SkFontPriv.h"
#include "src/utils/SkMetaData.h"
#include "tools/ToolUtils.h"
#include <utility>
// 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 SkFont& font) {
canvas->drawString(text, x, y, font, SkPaint());
return x + font.measureText(text.c_str(), text.size(), kUTF8_SkTextEncoding);
}
static SkScalar drawCharacter(SkCanvas* canvas, uint32_t character, SkScalar x,
SkScalar y, const SkFont& origFont, SkFontMgr* fm,
const char* fontName, const char* bcp47[], int bcp47Count,
const SkFontStyle& fontStyle) {
SkFont font = origFont;
// 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));
font.setTypeface(typeface);
x = drawString(canvas, ch, x, y, font) + 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);
font.setTypeface(fm->legacyMakeTypeface(familyName.c_str(), typeface->fontStyle()));
return drawString(canvas, ch, x, y, font) + 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();
}
protected:
SkString onShortName() override {
return fName;
}
SkISize onISize() override {
return SkISize::Make(1536, 768);
}
void onDraw(SkCanvas* canvas) override {
SkScalar y = 20;
SkFont font;
font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
font.setSubpixel(true);
font.setSize(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);
font.setTypeface(nullptr);
(void)drawString(canvas, familyName, 20, y, font);
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());
font.setTypeface(sk_sp<SkTypeface>(set->createTypeface(j)));
x = drawString(canvas, sname, x, y, font) + 20;
// check to see that we get different glyphs in japanese and chinese
x = drawCharacter(canvas, 0x5203, x, y, font, fm, familyName.c_str(), &zh, 1, fs);
x = drawCharacter(canvas, 0x5203, x, y, font, fm, familyName.c_str(), &ja, 1, fs);
// check that emoji characters are found
x = drawCharacter(canvas, 0x1f601, x, y, font, 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 {
return SkString("fontmgr_match");
}
SkISize onISize() override {
return SkISize::Make(640, 1024);
}
void iterateFamily(SkCanvas* canvas, const SkFont& font, SkFontStyleSet* fset) {
SkFont f(font);
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());
f.setTypeface(sk_sp<SkTypeface>(fset->createTypeface(j)));
(void)drawString(canvas, sname, 0, y, f);
y += 24;
}
}
void exploreFamily(SkCanvas* canvas, const SkFont& font, SkFontStyleSet* fset) {
SkFont f(font);
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());
f.setTypeface(std::move(face));
(void)drawString(canvas, str, 0, y, f);
y += 24;
}
}
}
}
DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
SkFont font;
font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
font.setSubpixel(true);
font.setSize(17);
const char* gNames[] = {
"Helvetica Neue", "Arial", "sans"
};
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()) {
*errorMsg = "No SkFontStyleSet";
return DrawResult::kFail;
}
canvas->translate(20, 40);
this->exploreFamily(canvas, font, fset.get());
canvas->translate(150, 0);
this->iterateFamily(canvas, font, fset.get());
return DrawResult::kOk;
}
private:
typedef GM INHERITED;
};
class FontMgrBoundsGM : public skiagm::GM {
public:
FontMgrBoundsGM(double scale, double skew)
: fFM(SkFontMgr::RefDefault())
, fName("fontmgr_bounds")
, fScaleX(SkDoubleToScalar(scale))
, fSkewX(SkDoubleToScalar(skew))
, fLabelBounds(false)
{
if (scale != 1 || skew != 0) {
fName.appendf("_%g_%g", scale, skew);
}
}
bool onGetControls(SkMetaData* controls) override {
controls->setBool("Label Bounds", fLabelBounds);
return true;
}
void onSetControls(const SkMetaData& controls) override {
controls.findBool("Label Bounds", &fLabelBounds);
}
static void show_bounds(SkCanvas* canvas, const SkFont& font, SkScalar x, SkScalar y,
SkColor boundsColor, bool labelBounds)
{
SkRect fontBounds = SkFontPriv::GetFontBounds(font).makeOffset(x, y);
SkPaint boundsPaint;
boundsPaint.setAntiAlias(true);
boundsPaint.setColor(boundsColor);
boundsPaint.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(fontBounds, boundsPaint);
SkFontMetrics fm;
font.getMetrics(&fm);
SkPaint metricsPaint(boundsPaint);
metricsPaint.setStyle(SkPaint::kFill_Style);
metricsPaint.setAlphaf(0.25f);
if ((fm.fFlags & SkFontMetrics::kUnderlinePositionIsValid_Flag) &&
(fm.fFlags & SkFontMetrics::kUnderlineThicknessIsValid_Flag))
{
SkRect underline{ fontBounds.fLeft, fm.fUnderlinePosition+y,
fontBounds.fRight, fm.fUnderlinePosition+y + fm.fUnderlineThickness };
canvas->drawRect(underline, metricsPaint);
}
if ((fm.fFlags & SkFontMetrics::kStrikeoutPositionIsValid_Flag) &&
(fm.fFlags & SkFontMetrics::kStrikeoutThicknessIsValid_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 = font.getTypefaceOrDefault()->countGlyphs();
SkRect min = {0, 0, 0, 0};
for (int i = 0; i < numGlyphs; ++i) {
SkGlyphID glyphId = i;
SkRect cur;
font.getBounds(&glyphId, 1, &cur, nullptr);
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 };
SkPoint location[] = {
{fontBounds.left(), fontBounds.centerY()},
{fontBounds.right(), fontBounds.centerY()},
{fontBounds.centerX(), fontBounds.top()},
{fontBounds.centerX(), fontBounds.bottom()}
};
SkFont labelFont;
labelFont.setEdging(SkFont::Edging::kAntiAlias);
labelFont.setTypeface(ToolUtils::create_portable_typeface());
if (labelBounds) {
SkString name;
font.getTypefaceOrDefault()->getFamilyName(&name);
canvas->drawString(name, fontBounds.fLeft, fontBounds.fBottom, labelFont, SkPaint());
}
for (size_t i = 0; i < SK_ARRAY_COUNT(str); ++i) {
SkPath path;
font.getPath(str[i], &path);
path.offset(x, y);
SkPaint::Style style = path.isEmpty() ? SkPaint::kFill_Style : SkPaint::kStroke_Style;
SkPaint glyphPaint;
glyphPaint.setStyle(style);
canvas->drawSimpleText(&str[i], sizeof(str[0]), kGlyphID_SkTextEncoding, x, y, font, glyphPaint);
if (labelBounds) {
SkString glyphStr;
glyphStr.appendS32(str[i]);
canvas->drawString(glyphStr, location[i].fX, location[i].fY, labelFont, SkPaint());
}
}
}
protected:
SkString onShortName() override {
return fName;
}
SkISize onISize() override {
return SkISize::Make(1024, 850);
}
void onDraw(SkCanvas* canvas) override {
SkFont font;
font.setEdging(SkFont::Edging::kAntiAlias);
font.setSubpixel(true);
font.setSize(100);
font.setScaleX(fScaleX);
font.setSkewX(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) {
font.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 (font.getTypefaceOrDefault() && font.getTypefaceOrDefault()->countGlyphs() < 1000) {
SkRect fontBounds = SkFontPriv::GetFontBounds(font);
x -= fontBounds.fLeft;
show_bounds(canvas, font, x, y, boundsColors[index & 1], fLabelBounds);
x += fontBounds.fRight + 20;
index += 1;
if (x > 900) {
x = 0;
y += 160;
}
if (y >= 700) {
return;
}
}
}
}
}
private:
const sk_sp<SkFontMgr> fFM;
SkString fName;
const SkScalar fScaleX;
const SkScalar fSkewX;
bool fLabelBounds;
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);)
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