144 lines
5.1 KiB
C++
144 lines
5.1 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/SkCanvas.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkFontArguments.h"
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#include "include/core/SkFontMgr.h"
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#include "include/core/SkFontTypes.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkStream.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTypeface.h"
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#include "include/core/SkTypes.h"
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#include "tools/Resources.h"
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#include <string.h>
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#include <memory>
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#include <utility>
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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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private:
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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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inline static constexpr int rows = 2;
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inline static constexpr int cols = 5;
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sk_sp<SkTypeface> typeface[rows][cols];
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void onOnceBeforeDraw() override {
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sk_sp<SkFontMgr> fontMgr(SkFontMgr::RefDefault());
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constexpr SkFourByteTag wght = SkSetFourByteTag('w','g','h','t');
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//constexpr SkFourByteTag wdth = SkSetFourByteTag('w','d','t','h');
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struct {
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sk_sp<SkTypeface> distortable;
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SkFourByteTag axisTag;
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SkScalar axisMin;
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SkScalar axisMax;
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} info = {
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MakeResourceAsTypeface("fonts/Distortable.ttf"), wght, 0.5f, 2.0f
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//SkTypeface::MakeFromFile("/Library/Fonts/Skia.ttf"), wght, 0.48f, 3.2f
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//SkTypeface::MakeFromName("Skia", SkFontStyle()), wdth, 0.62f, 1.3f
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//SkTypeface::MakeFromFile("/System/Library/Fonts/SFNS.ttf"), wght, 100.0f, 900.0f
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//SkTypeface::MakeFromName(".SF NS", SkFontStyle()), wght, 100.0f, 900.0f
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};
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std::unique_ptr<SkStreamAsset> distortableStream( info.distortable
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? info.distortable->openStream(nullptr)
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: nullptr);
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for (int row = 0; row < rows; ++row) {
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for (int col = 0; col < cols; ++col) {
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SkScalar styleValue = SkScalarInterp(info.axisMin, info.axisMax,
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SkScalar(row * cols + col) / (rows * cols));
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SkFontArguments::VariationPosition::Coordinate coordinates[] = {
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{info.axisTag, styleValue},
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{info.axisTag, styleValue}
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};
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SkFontArguments::VariationPosition position = {
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coordinates, SK_ARRAY_COUNT(coordinates)
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};
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typeface[row][col] = [&]() -> sk_sp<SkTypeface> {
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if (row == 0 && info.distortable) {
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return info.distortable->makeClone(
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SkFontArguments().setVariationDesignPosition(position));
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}
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if (distortableStream) {
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return fontMgr->makeFromStream(distortableStream->duplicate(),
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SkFontArguments().setVariationDesignPosition(position));
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}
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return nullptr;
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}();
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}
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}
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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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const char* text = "abc";
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const size_t textLen = strlen(text);
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for (int row = 0; row < rows; ++row) {
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for (int col = 0; col < cols; ++col) {
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SkScalar x = SkIntToScalar(10);
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SkScalar y = SkIntToScalar(20);
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font.setTypeface(typeface[row][col] ? typeface[row][col] : nullptr);
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SkAutoCanvasRestore acr(canvas, true);
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canvas->translate(SkIntToScalar(30 + col * 100), SkIntToScalar(20));
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canvas->rotate(SkIntToScalar(col * 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.setLTRB(x - 3, 15, x - 1, 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, SkTextEncoding::kUTF8, 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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font.setBaselineSnap(false);
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}
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return DrawResult::kOk;
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}
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new FontScalerDistortableGM; )
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} // namespace skiagm
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