25e371f7ee
An FcConfig has the concept of a sysroot against which file names should be resolved. Add support for this so that it is possible to use relocatable FcConfigs. Also adds a test that this works. Change-Id: I523d5fb1233830434a88dc52b27728aaf83bb5a5 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/206278 Commit-Queue: Ben Wagner <bungeman@google.com> Reviewed-by: Herb Derby <herb@google.com>
104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
/*
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* Copyright 2014 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 "Resources.h"
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#include "SkCanvas.h"
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#include "SkFont.h"
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#include "SkFontMgr.h"
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#include "SkFontMgr_fontconfig.h"
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#include "SkTypeface.h"
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#include "Test.h"
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#include <fontconfig/fontconfig.h>
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static bool bitmap_compare(const SkBitmap& ref, const SkBitmap& test) {
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for (int y = 0; y < test.height(); ++y) {
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for (int x = 0; x < test.width(); ++x) {
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SkColor testColor = test.getColor(x, y);
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SkColor refColor = ref.getColor(x, y);
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if (refColor != testColor) {
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return false;
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}
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}
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}
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return true;
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}
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DEF_TEST(FontMgrFontConfig, reporter) {
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FcConfig* config = FcConfigCreate();
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// FontConfig may modify the passed path (make absolute or other).
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FcConfigSetSysRoot(config, reinterpret_cast<const FcChar8*>(GetResourcePath("").c_str()));
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// FontConfig will lexically compare paths against its version of the sysroot.
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SkString distortablePath(reinterpret_cast<const char*>(FcConfigGetSysRoot(config)));
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distortablePath += "/fonts/Distortable.ttf";
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FcConfigAppFontAddFile(config, reinterpret_cast<const FcChar8*>(distortablePath.c_str()));
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FcConfigBuildFonts(config);
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sk_sp<SkFontMgr> fontMgr(SkFontMgr_New_FontConfig(config));
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sk_sp<SkTypeface> typeface(fontMgr->legacyMakeTypeface("Distortable", SkFontStyle()));
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if (!typeface) {
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ERRORF(reporter, "Could not find typeface. FcVersion: %d", FcGetVersion());
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return;
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}
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SkBitmap bitmapStream;
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bitmapStream.allocN32Pixels(64, 64);
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SkCanvas canvasStream(bitmapStream);
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canvasStream.drawColor(SK_ColorWHITE);
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SkBitmap bitmapClone;
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bitmapClone.allocN32Pixels(64, 64);
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SkCanvas canvasClone(bitmapClone);
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canvasStream.drawColor(SK_ColorWHITE);
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SkPaint paint;
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paint.setColor(SK_ColorGRAY);
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constexpr float kTextSize = 20;
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std::unique_ptr<SkStreamAsset> distortableStream(
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GetResourceAsStream("fonts/Distortable.ttf"));
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if (!distortableStream) {
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return;
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}
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SkPoint point = SkPoint::Make(20.0f, 20.0f);
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SkFourByteTag tag = SkSetFourByteTag('w', 'g', 'h', 't');
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for (int i = 0; i < 10; ++i) {
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SkScalar styleValue =
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SkDoubleToScalar(0.5 + i * ((2.0 - 0.5) / 10));
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SkFontArguments::VariationPosition::Coordinate
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coordinates[] = {{tag, styleValue}};
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SkFontArguments::VariationPosition
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position = {coordinates, SK_ARRAY_COUNT(coordinates)};
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SkFont fontStream(
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fontMgr->makeFromStream(distortableStream->duplicate(),
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SkFontArguments().setVariationDesignPosition(position)),
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kTextSize);
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fontStream.setEdging(SkFont::Edging::kSubpixelAntiAlias);
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SkFont fontClone(
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typeface->makeClone(SkFontArguments().setVariationDesignPosition(position)), kTextSize);
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fontClone.setEdging(SkFont::Edging::kSubpixelAntiAlias);
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constexpr char text[] = "abc";
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canvasStream.drawColor(SK_ColorWHITE);
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canvasStream.drawString(text, point.fX, point.fY, fontStream, paint);
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canvasClone.drawColor(SK_ColorWHITE);
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canvasClone.drawString(text, point.fX, point.fY, fontClone, paint);
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bool success = bitmap_compare(bitmapStream, bitmapClone);
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REPORTER_ASSERT(reporter, success);
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}
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}
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