133 lines
3.9 KiB
C++
133 lines
3.9 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.h"
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#include "Resources.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.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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#include "../src/fonts/SkRandomScalerContext.h"
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#if SK_SUPPORT_GPU
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#include "GrContext.h"
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namespace skiagm {
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class TextBlobRandomFont : public GM {
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public:
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// This gm tests that textblobs can be translated and scaled with a font that returns random
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// but deterministic masks
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TextBlobRandomFont() { }
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protected:
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void onOnceBeforeDraw() override {
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SkTextBlobBuilder builder;
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const char* text = "The quick brown fox jumps over the lazy dog.";
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// make textbloben
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SkPaint paint;
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paint.setTextSize(32);
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paint.setLCDRenderText(true);
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// Setup our random scaler context
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SkAutoTUnref<SkTypeface> orig(sk_tool_utils::create_portable_typeface("sans-serif",
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SkTypeface::kBold));
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if (NULL == orig) {
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orig.reset(SkTypeface::RefDefault());
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}
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SkAutoTUnref<SkTypeface> random(SkNEW_ARGS(SkRandomTypeface, (orig, paint, false)));
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paint.setTypeface(random);
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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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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0);
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// A8
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paint.setSubpixelText(false);
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paint.setLCDRenderText(false);
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sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 32);
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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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return SkString("textblobrandomfont");
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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* canvas) override {
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// This GM exists to test a specific feature of the GPU backend.
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if (NULL == canvas->getGrContext()) {
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this->drawGpuOnlyMessage(canvas);
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return;
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}
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canvas->drawColor(sk_tool_utils::color_to_565(SK_ColorWHITE));
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SkImageInfo info = SkImageInfo::MakeN32Premul(kWidth, kHeight);
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SkSurfaceProps props(0, kUnknown_SkPixelGeometry);
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SkAutoTUnref<SkSurface> surface(canvas->newSurface(info, &props));
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if (surface) {
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SkPaint paint;
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paint.setAntiAlias(true);
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SkCanvas* c = surface->getCanvas();
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int stride = SkScalarCeilToInt(fBlob->bounds().height() / 2) + 10;
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int yOffset = stride;
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for (int i = 0; i < 10; i++) {
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// fiddle the canvas to force regen of textblobs
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canvas->rotate(i % 2 ? 0.0f : -0.05f);
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canvas->drawTextBlob(fBlob, 10.0f, SkIntToScalar(yOffset), paint);
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yOffset += stride;
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// This will draw as black boxes
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c->drawTextBlob(fBlob, 10, SkIntToScalar(yOffset), paint);
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surface->draw(canvas, 0, 0, nullptr);
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// free gpu resources and verify
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yOffset += stride;
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canvas->getGrContext()->freeGpuResources();
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canvas->drawTextBlob(fBlob, 10, SkIntToScalar(yOffset), paint);
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yOffset += stride;
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}
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} else {
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const char* text = "This test requires a surface";
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size_t len = strlen(text);
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SkPaint paint;
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canvas->drawText(text, len, 10, 100, paint);
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}
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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 = 1000;
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static const int kHeight = 1000;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return SkNEW(TextBlobRandomFont); )
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}
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#endif
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