2a475eae62
Many tests and examples use drawText with a guess of how long the text is in bytes, or a call to strlen(). Add a helper to SkCanvas to simplify these examples. Add another helper for SkString. R=reed@google.com Change-Id: I0204a31e938f065606f08ee7cd9a6b36db791ee2 Reviewed-on: https://skia-review.googlesource.com/13642 Commit-Queue: Cary Clark <caryclark@google.com> Reviewed-by: Cary Clark <caryclark@google.com> Reviewed-by: Mike Reed <reed@google.com> Reviewed-by: Cary Clark <caryclark@skia.org>
93 lines
3.0 KiB
C++
93 lines
3.0 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 "sk_tool_utils.h"
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#include "SkShader.h"
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// Inspired by svg/as-border-image/svg-as-border-image.html. Draws a four-color checker board bitmap
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// such that it is stretched and repeat tiled with different filter qualities. It is testing whether
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// the bmp filter respects the repeat mode at the tile seams.
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class BmpFilterQualityRepeat : public skiagm::GM {
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public:
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BmpFilterQualityRepeat() { this->setBGColor(sk_tool_utils::color_to_565(0xFFCCBBAA)); }
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protected:
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void onOnceBeforeDraw() override {
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fBmp.allocN32Pixels(40, 40, true);
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SkCanvas canvas(fBmp);
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SkBitmap colorBmp;
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colorBmp.allocN32Pixels(20, 20, true);
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colorBmp.eraseColor(0xFFFF0000);
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canvas.drawBitmap(colorBmp, 0, 0);
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colorBmp.eraseColor(sk_tool_utils::color_to_565(0xFF008200));
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canvas.drawBitmap(colorBmp, 20, 0);
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colorBmp.eraseColor(sk_tool_utils::color_to_565(0xFFFF9000));
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canvas.drawBitmap(colorBmp, 0, 20);
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colorBmp.eraseColor(sk_tool_utils::color_to_565(0xFF2000FF));
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canvas.drawBitmap(colorBmp, 20, 20);
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}
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SkString onShortName() override { return SkString("bmp_filter_quality_repeat"); }
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SkISize onISize() override { return SkISize::Make(1000, 400); }
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void onDraw(SkCanvas* canvas) override {
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this->drawAll(canvas, 2.5f);
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canvas->translate(0, 250);
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canvas->scale(0.5, 0.5);
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this->drawAll(canvas, 1);
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}
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private:
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void drawAll(SkCanvas* canvas, SkScalar scaleX) const {
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constexpr struct {
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SkFilterQuality fQuality;
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const char* fName;
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} kQualities[] = {
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{kNone_SkFilterQuality, "none"},
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{kLow_SkFilterQuality, "low"},
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{kMedium_SkFilterQuality, "medium"},
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{kHigh_SkFilterQuality, "high"},
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};
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SkRect rect = SkRect::MakeLTRB(20, 60, 220, 210);
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SkMatrix lm = SkMatrix::I();
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lm.setScaleX(scaleX);
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lm.setTranslateX(423);
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lm.setTranslateY(330);
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SkPaint textPaint;
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sk_tool_utils::set_portable_typeface(&textPaint);
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textPaint.setAntiAlias(true);
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SkPaint bmpPaint(textPaint);
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SkAutoCanvasRestore acr(canvas, true);
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for (size_t q = 0; q < SK_ARRAY_COUNT(kQualities); ++q) {
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constexpr SkShader::TileMode kTM = SkShader::kRepeat_TileMode;
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bmpPaint.setShader(SkShader::MakeBitmapShader(fBmp, kTM, kTM, &lm));
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bmpPaint.setFilterQuality(kQualities[q].fQuality);
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canvas->drawRect(rect, bmpPaint);
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canvas->drawString(kQualities[q].fName, 20, 40, textPaint);
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canvas->translate(250, 0);
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}
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}
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SkBitmap fBmp;
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typedef skiagm::GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new BmpFilterQualityRepeat;)
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