f460eeec99
Now that no one is using the linear metrics flag directly, change the meaning from 'no-hinting and subpixel positioning at an odd size when measuring and just no-hinting when drawing' to meaning 'use linear metrics'. This also changes the font hosts to no longer use subpixel positioning as a proxy for this value. This fixes outstanding bugs in Chromium about getting the right metrics for hinted fonts. Change-Id: I033b3d5ad431eba906a89cc0fefc59cd6702a02c Reviewed-on: https://skia-review.googlesource.com/c/skia/+/209174 Commit-Queue: Ben Wagner <bungeman@google.com> Reviewed-by: Mike Reed <reed@google.com> Reviewed-by: Herb Derby <herb@google.com>
105 lines
3.6 KiB
C++
105 lines
3.6 KiB
C++
/*
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* Copyright 2015 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/gm.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkFontMgr.h"
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#include "include/core/SkTypeface.h"
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#include "include/private/SkFixed.h"
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#include "src/core/SkFontDescriptor.h"
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#include "tools/Resources.h"
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namespace skiagm {
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class FontScalerDistortableGM : public GM {
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public:
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FontScalerDistortableGM() {
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this->setBGColor(0xFFFFFFFF);
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}
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protected:
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SkString onShortName() override {
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return SkString("fontscalerdistortable");
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}
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SkISize onISize() override {
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return SkISize::Make(550, 700);
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}
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DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
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SkPaint paint;
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paint.setAntiAlias(true);
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SkFont font;
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font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
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sk_sp<SkFontMgr> fontMgr(SkFontMgr::RefDefault());
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std::unique_ptr<SkStreamAsset> distortableStream(GetResourceAsStream("fonts/Distortable.ttf"));
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sk_sp<SkTypeface> distortable(MakeResourceAsTypeface("fonts/Distortable.ttf"));
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if (!distortableStream) {
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*errorMsg = "No distortableStream";
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return DrawResult::kFail;
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}
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const char* text = "abc";
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const size_t textLen = strlen(text);
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for (int j = 0; j < 2; ++j) {
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for (int i = 0; i < 5; ++i) {
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SkScalar x = SkIntToScalar(10);
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SkScalar y = SkIntToScalar(20);
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SkFourByteTag tag = SkSetFourByteTag('w','g','h','t');
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SkScalar styleValue = SkDoubleToScalar(0.5 + (5 * j + i) * ((2.0 - 0.5) / (2 * 5)));
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SkFontArguments::VariationPosition::Coordinate coordinates[] = {{tag, styleValue}};
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SkFontArguments::VariationPosition position =
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{ coordinates, SK_ARRAY_COUNT(coordinates) };
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if (j == 0 && distortable) {
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sk_sp<SkTypeface> clone = distortable->makeClone(
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SkFontArguments().setVariationDesignPosition(position));
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font.setTypeface(clone ? std::move(clone) : distortable);
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} else {
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font.setTypeface(fontMgr->makeFromStream(
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distortableStream->duplicate(),
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SkFontArguments().setVariationDesignPosition(position)));
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}
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SkAutoCanvasRestore acr(canvas, true);
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canvas->translate(SkIntToScalar(30 + i * 100), SkIntToScalar(20));
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canvas->rotate(SkIntToScalar(i * 5), x, y * 10);
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{
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SkPaint p;
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p.setAntiAlias(true);
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SkRect r;
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r.set(x - SkIntToScalar(3), SkIntToScalar(15),
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x - SkIntToScalar(1), SkIntToScalar(280));
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canvas->drawRect(r, p);
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}
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for (int ps = 6; ps <= 22; ps++) {
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font.setSize(SkIntToScalar(ps));
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canvas->drawSimpleText(text, textLen, kUTF8_SkTextEncoding, x, y, font, paint);
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y += font.getMetrics(nullptr);
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}
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}
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canvas->translate(0, SkIntToScalar(360));
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font.setSubpixel(true);
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font.setLinearMetrics(true);
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}
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return DrawResult::kOk;
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}
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private:
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new FontScalerDistortableGM; )
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}
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