cb6f53efbc
Future CLs will migrate all callers to use SkFontMetrics, so we can remove the SkPaint typedef. Next migrate the world to use SkFont::getMetrics() instead Bug: skia:2664 Change-Id: I2aa45cd88762c3d3589c12f5074974af7fb85410 Reviewed-on: https://skia-review.googlesource.com/c/168641 Reviewed-by: Herb Derby <herb@google.com> Commit-Queue: Mike Reed <reed@google.com>
368 lines
12 KiB
C++
368 lines
12 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "sk_tool_utils.h"
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#include "SkCanvas.h"
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#include "SkCommonFlags.h"
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#include "SkFontMgr.h"
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#include "SkPath.h"
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#include "SkGraphics.h"
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#include "SkTypeface.h"
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// limit this just so we don't take too long to draw
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#define MAX_FAMILIES 30
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static SkScalar drawString(SkCanvas* canvas, const SkString& text, SkScalar x,
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SkScalar y, const SkPaint& paint) {
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canvas->drawString(text, x, y, paint);
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return x + paint.measureText(text.c_str(), text.size());
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}
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static SkScalar drawCharacter(SkCanvas* canvas, uint32_t character, SkScalar x,
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SkScalar y, SkPaint& paint, SkFontMgr* fm,
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const char* fontName, const char* bcp47[], int bcp47Count,
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const SkFontStyle& fontStyle) {
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// find typeface containing the requested character and draw it
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SkString ch;
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ch.appendUnichar(character);
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sk_sp<SkTypeface> typeface(fm->matchFamilyStyleCharacter(fontName, fontStyle,
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bcp47, bcp47Count, character));
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paint.setTypeface(typeface);
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x = drawString(canvas, ch, x, y, paint) + 20;
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if (nullptr == typeface) {
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return x;
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}
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// repeat the process, but this time use the family name of the typeface
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// from the first pass. This emulates the behavior in Blink where it
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// it expects to get the same glyph when following this pattern.
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SkString familyName;
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typeface->getFamilyName(&familyName);
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paint.setTypeface(fm->legacyMakeTypeface(familyName.c_str(), typeface->fontStyle()));
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return drawString(canvas, ch, x, y, paint) + 20;
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}
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static const char* zh = "zh";
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static const char* ja = "ja";
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class FontMgrGM : public skiagm::GM {
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public:
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FontMgrGM() {
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SkGraphics::SetFontCacheLimit(16 * 1024 * 1024);
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fName.set("fontmgr_iter");
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fFM = SkFontMgr::RefDefault();
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fName.append(sk_tool_utils::platform_font_manager());
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}
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protected:
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SkString onShortName() override {
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return fName;
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}
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SkISize onISize() override {
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return SkISize::Make(1536, 768);
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}
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void onDraw(SkCanvas* canvas) override {
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SkScalar y = 20;
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setLCDRenderText(true);
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paint.setSubpixelText(true);
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paint.setTextSize(17);
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SkFontMgr* fm = fFM.get();
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int count = SkMin32(fm->countFamilies(), MAX_FAMILIES);
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for (int i = 0; i < count; ++i) {
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SkString familyName;
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fm->getFamilyName(i, &familyName);
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paint.setTypeface(nullptr);
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(void)drawString(canvas, familyName, 20, y, paint);
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SkScalar x = 220;
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sk_sp<SkFontStyleSet> set(fm->createStyleSet(i));
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for (int j = 0; j < set->count(); ++j) {
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SkString sname;
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SkFontStyle fs;
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set->getStyle(j, &fs, &sname);
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sname.appendf(" [%d %d %d]", fs.weight(), fs.width(), fs.slant());
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paint.setTypeface(sk_sp<SkTypeface>(set->createTypeface(j)));
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x = drawString(canvas, sname, x, y, paint) + 20;
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// check to see that we get different glyphs in japanese and chinese
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x = drawCharacter(canvas, 0x5203, x, y, paint, fm, familyName.c_str(), &zh, 1, fs);
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x = drawCharacter(canvas, 0x5203, x, y, paint, fm, familyName.c_str(), &ja, 1, fs);
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// check that emoji characters are found
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x = drawCharacter(canvas, 0x1f601, x, y, paint, fm, familyName.c_str(), nullptr,0, fs);
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}
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y += 24;
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}
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}
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private:
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sk_sp<SkFontMgr> fFM;
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SkString fName;
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typedef GM INHERITED;
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};
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class FontMgrMatchGM : public skiagm::GM {
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sk_sp<SkFontMgr> fFM;
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public:
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FontMgrMatchGM() : fFM(SkFontMgr::RefDefault()) {
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SkGraphics::SetFontCacheLimit(16 * 1024 * 1024);
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}
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protected:
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SkString onShortName() override {
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SkString name("fontmgr_match");
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name.append(sk_tool_utils::platform_font_manager());
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return name;
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}
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SkISize onISize() override {
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return SkISize::Make(640, 1024);
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}
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void iterateFamily(SkCanvas* canvas, const SkPaint& paint,
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SkFontStyleSet* fset) {
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SkPaint p(paint);
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SkScalar y = 0;
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for (int j = 0; j < fset->count(); ++j) {
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SkString sname;
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SkFontStyle fs;
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fset->getStyle(j, &fs, &sname);
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sname.appendf(" [%d %d]", fs.weight(), fs.width());
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p.setTypeface(sk_sp<SkTypeface>(fset->createTypeface(j)));
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(void)drawString(canvas, sname, 0, y, p);
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y += 24;
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}
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}
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void exploreFamily(SkCanvas* canvas, const SkPaint& paint,
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SkFontStyleSet* fset) {
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SkPaint p(paint);
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SkScalar y = 0;
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for (int weight = 100; weight <= 900; weight += 200) {
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for (int width = 1; width <= 9; width += 2) {
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SkFontStyle fs(weight, width, SkFontStyle::kUpright_Slant);
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sk_sp<SkTypeface> face(fset->matchStyle(fs));
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if (face) {
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SkString str;
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str.printf("request [%d %d]", fs.weight(), fs.width());
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p.setTypeface(std::move(face));
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(void)drawString(canvas, str, 0, y, p);
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y += 24;
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}
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}
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}
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setLCDRenderText(true);
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paint.setSubpixelText(true);
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paint.setTextSize(17);
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const char* gNames[] = {
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"Helvetica Neue", "Arial", "sans"
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};
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sk_sp<SkFontStyleSet> fset;
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for (size_t i = 0; i < SK_ARRAY_COUNT(gNames); ++i) {
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fset.reset(fFM->matchFamily(gNames[i]));
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if (fset->count() > 0) {
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break;
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}
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}
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if (nullptr == fset.get()) {
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return;
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}
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canvas->translate(20, 40);
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this->exploreFamily(canvas, paint, fset.get());
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canvas->translate(150, 0);
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this->iterateFamily(canvas, paint, fset.get());
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}
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private:
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typedef GM INHERITED;
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};
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class FontMgrBoundsGM : public skiagm::GM {
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public:
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FontMgrBoundsGM(double scale, double skew)
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: fScaleX(SkDoubleToScalar(scale))
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, fSkewX(SkDoubleToScalar(skew))
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{
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fName.set("fontmgr_bounds");
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if (scale != 1 || skew != 0) {
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fName.appendf("_%g_%g", scale, skew);
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}
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fName.append(sk_tool_utils::platform_font_manager());
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fFM = SkFontMgr::RefDefault();
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}
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static void show_bounds(SkCanvas* canvas, const SkPaint& paint, SkScalar x, SkScalar y,
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SkColor boundsColor)
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{
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SkPaint glyphPaint(paint);
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SkRect fontBounds = glyphPaint.getFontBounds();
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fontBounds.offset(x, y);
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SkPaint boundsPaint(glyphPaint);
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boundsPaint.setColor(boundsColor);
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boundsPaint.setStyle(SkPaint::kStroke_Style);
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canvas->drawRect(fontBounds, boundsPaint);
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SkFontMetrics fm;
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glyphPaint.getFontMetrics(&fm);
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SkPaint metricsPaint(boundsPaint);
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metricsPaint.setStyle(SkPaint::kFill_Style);
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metricsPaint.setAlpha(0x40);
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if ((fm.fFlags & SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag) &&
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(fm.fFlags & SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag))
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{
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SkRect underline{ fontBounds.fLeft, fm.fUnderlinePosition+y,
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fontBounds.fRight, fm.fUnderlinePosition+y + fm.fUnderlineThickness };
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canvas->drawRect(underline, metricsPaint);
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}
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if ((fm.fFlags & SkPaint::FontMetrics::kStrikeoutPositionIsValid_Flag) &&
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(fm.fFlags & SkPaint::FontMetrics::kStrikeoutPositionIsValid_Flag))
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{
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SkRect strikeout{ fontBounds.fLeft, fm.fStrikeoutPosition+y - fm.fStrikeoutThickness,
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fontBounds.fRight, fm.fStrikeoutPosition+y };
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canvas->drawRect(strikeout, metricsPaint);
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}
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SkGlyphID left = 0, right = 0, top = 0, bottom = 0;
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{
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int numGlyphs = glyphPaint.getTypeface()->countGlyphs();
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SkRect min = {0, 0, 0, 0};
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glyphPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
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for (int i = 0; i < numGlyphs; ++i) {
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SkGlyphID glyphId = i;
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SkRect cur;
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glyphPaint.measureText(&glyphId, sizeof(glyphId), &cur);
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if (cur.fLeft < min.fLeft ) { min.fLeft = cur.fLeft; left = i; }
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if (cur.fTop < min.fTop ) { min.fTop = cur.fTop ; top = i; }
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if (min.fRight < cur.fRight ) { min.fRight = cur.fRight; right = i; }
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if (min.fBottom < cur.fBottom) { min.fBottom = cur.fBottom; bottom = i; }
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}
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}
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SkGlyphID str[] = { left, right, top, bottom };
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SkPoint location[] = {
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{fontBounds.left(), fontBounds.centerY()},
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{fontBounds.right(), fontBounds.centerY()},
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{fontBounds.centerX(), fontBounds.top()},
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{fontBounds.centerX(), fontBounds.bottom()}
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};
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SkPaint labelPaint;
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labelPaint.setAntiAlias(true);
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sk_tool_utils::set_portable_typeface(&labelPaint);
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if (FLAGS_veryVerbose) {
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SkString name;
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paint.getTypeface()->getFamilyName(&name);
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canvas->drawText(name.c_str(), name.size(),
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fontBounds.fLeft, fontBounds.fBottom, labelPaint);
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}
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for (size_t i = 0; i < SK_ARRAY_COUNT(str); ++i) {
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SkPath path;
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glyphPaint.getTextPath(&str[i], sizeof(str[0]), x, y, &path);
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SkPaint::Style style = path.isEmpty() ? SkPaint::kFill_Style : SkPaint::kStroke_Style;
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glyphPaint.setStyle(style);
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canvas->drawText(&str[i], sizeof(str[0]), x, y, glyphPaint);
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if (FLAGS_veryVerbose) {
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SkString glyphStr;
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glyphStr.appendS32(str[i]);
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canvas->drawText(glyphStr.c_str(), glyphStr.size(),
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location[i].fX, location[i].fY, labelPaint);
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}
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}
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}
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protected:
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SkString onShortName() override {
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return fName;
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}
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SkISize onISize() override {
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return SkISize::Make(1024, 850);
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setSubpixelText(true);
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paint.setTextSize(100);
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paint.setTextScaleX(fScaleX);
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paint.setTextSkewX(fSkewX);
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const SkColor boundsColors[2] = { SK_ColorRED, SK_ColorBLUE };
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SkFontMgr* fm = fFM.get();
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int count = SkMin32(fm->countFamilies(), 32);
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int index = 0;
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SkScalar x = 0, y = 0;
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canvas->translate(10, 120);
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for (int i = 0; i < count; ++i) {
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sk_sp<SkFontStyleSet> set(fm->createStyleSet(i));
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for (int j = 0; j < set->count() && j < 3; ++j) {
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paint.setTypeface(sk_sp<SkTypeface>(set->createTypeface(j)));
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// Fonts with lots of glyphs are interesting, but can take a long time to find
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// the glyphs which make up the maximum extent.
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if (paint.getTypeface() && paint.getTypeface()->countGlyphs() < 1000) {
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SkRect fontBounds = paint.getFontBounds();
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x -= fontBounds.fLeft;
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show_bounds(canvas, paint, x, y, boundsColors[index & 1]);
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x += fontBounds.fRight + 20;
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index += 1;
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if (x > 900) {
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x = 0;
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y += 160;
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}
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if (y >= 700) {
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return;
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}
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}
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}
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}
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}
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private:
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sk_sp<SkFontMgr> fFM;
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SkString fName;
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SkScalar fScaleX, fSkewX;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new FontMgrGM;)
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DEF_GM(return new FontMgrMatchGM;)
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DEF_GM(return new FontMgrBoundsGM(1.0, 0);)
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DEF_GM(return new FontMgrBoundsGM(0.75, 0);)
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DEF_GM(return new FontMgrBoundsGM(1.0, -0.25);)
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