Write a gm to verify append large glyph as path works
BUG=chromium:522846 Review URL: https://codereview.chromium.org/1316443006
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gm/textblobmixedsizes.cpp
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191
gm/textblobmixedsizes.cpp
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/*
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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.h"
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#include "Resources.h"
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#include "SkBlurMask.h"
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#include "SkBlurMaskFilter.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkImage.h"
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#include "SkRandom.h"
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#include "SkStream.h"
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#include "SkSurface.h"
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#include "SkTextBlob.h"
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#include "SkTypeface.h"
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namespace skiagm {
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class TextBlobMixedSizes : public GM {
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public:
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// This gm tests that textblobs of mixed sizes with a large glyph will render properly
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TextBlobMixedSizes(bool useDFT) : fUseDFT(useDFT) {}
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protected:
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void onOnceBeforeDraw() override {
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SkAutoTUnref<SkTypeface> typeface(GetResourceAsTypeface("/fonts/HangingS.ttf"));
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SkTextBlobBuilder builder;
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// make textblob. To stress distance fields, we choose sizes appropriately
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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.setLCDRenderText(true);
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paint.setTypeface(typeface);
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const char* text = "Sk";
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// extra large
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paint.setTextSize(262);
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0);
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// large
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SkRect bounds;
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paint.measureText(text, strlen(text), &bounds);
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SkScalar yOffset = bounds.height();
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paint.setTextSize(162);
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset);
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// Medium
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paint.measureText(text, strlen(text), &bounds);
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yOffset += bounds.height();
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paint.setTextSize(72);
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset);
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// Small
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paint.measureText(text, strlen(text), &bounds);
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yOffset += bounds.height();
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paint.setTextSize(32);
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset);
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// micro (will fall out of distance field text even if distance field text is enabled)
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paint.measureText(text, strlen(text), &bounds);
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yOffset += bounds.height();
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paint.setTextSize(14);
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset);
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// build
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fBlob.reset(builder.build());
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}
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SkString onShortName() override {
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SkString name("textblobmixedsizes");
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if (fUseDFT) {
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name.appendf("_df");
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}
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return name;
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}
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SkISize onISize() override {
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return SkISize::Make(kWidth, kHeight);
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}
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void onDraw(SkCanvas* inputCanvas) override {
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SkCanvas* canvas = inputCanvas;
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SkAutoTUnref<SkSurface> surface;
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if (fUseDFT) {
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#if SK_SUPPORT_GPU
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// Create a new Canvas to enable DFT
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GrContext* ctx = inputCanvas->getGrContext();
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SkImageInfo info = SkImageInfo::MakeN32Premul(onISize());
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SkSurfaceProps props(SkSurfaceProps::kUseDistanceFieldFonts_Flag,
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SkSurfaceProps::kLegacyFontHost_InitType);
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surface.reset(SkSurface::NewRenderTarget(ctx, SkSurface::kNo_Budgeted, info, 0,
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&props));
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canvas = surface.get() ? surface->getCanvas() : inputCanvas;
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// init our new canvas with the old canvas's matrix
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canvas->setMatrix(inputCanvas->getTotalMatrix());
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#endif
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}
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canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorWHITE));
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SkRect bounds = fBlob->bounds();
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static const int kPadX = SkScalarFloorToInt(bounds.width() / 3);
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static const int kPadY = SkScalarFloorToInt(bounds.height() / 3);
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int rowCount = 0;
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canvas->translate(SkIntToScalar(kPadX), SkIntToScalar(kPadY));
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canvas->save();
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SkRandom random;
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SkPaint paint;
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if (!fUseDFT) {
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paint.setColor(sk_tool_utils::color_to_565(SK_ColorWHITE));
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}
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paint.setAntiAlias(false);
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static const SkScalar kSigma = SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(8));
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// setup blur paint
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SkPaint blurPaint(paint);
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blurPaint.setColor(sk_tool_utils::color_to_565(SK_ColorBLACK));
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SkAutoTUnref<SkMaskFilter> mf(SkBlurMaskFilter::Create(kNormal_SkBlurStyle, kSigma));
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blurPaint.setMaskFilter(mf);
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for (int i = 0; i < 4; i++) {
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canvas->save();
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switch (i % 2) {
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case 0:
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canvas->rotate(random.nextF() * 45.f);
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break;
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case 1:
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canvas->rotate(-random.nextF() * 45.f);
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break;
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}
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if (!fUseDFT) {
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canvas->drawTextBlob(fBlob, 0, 0, blurPaint);
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}
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canvas->drawTextBlob(fBlob, 0, 0, paint);
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canvas->restore();
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canvas->translate(bounds.width() + SK_Scalar1 * kPadX, 0);
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++rowCount;
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if ((bounds.width() + 2 * kPadX) * rowCount > kWidth) {
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canvas->restore();
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canvas->translate(0, bounds.height() + SK_Scalar1 * kPadY);
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canvas->save();
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rowCount = 0;
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}
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}
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canvas->restore();
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#if SK_SUPPORT_GPU
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// render offscreen buffer
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if (surface) {
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SkAutoCanvasRestore acr(inputCanvas, true);
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// since we prepended this matrix already, we blit using identity
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inputCanvas->resetMatrix();
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SkImage* image = surface->newImageSnapshot();
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inputCanvas->drawImage(image, 0, 0, NULL);
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image->unref();
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}
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#endif
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}
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private:
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SkAutoTUnref<const SkTextBlob> fBlob;
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static const int kWidth = 2000;
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static const int kHeight = 2000;
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bool fUseDFT;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return SkNEW_ARGS(TextBlobMixedSizes, (false)); )
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#if SK_SUPPORT_GPU
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DEF_GM( return SkNEW_ARGS(TextBlobMixedSizes, (true)); )
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#endif
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}
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