d1701ba884
There is still a bit of manual mucking about with iwyu output to get things nice, but the checker seems to be doing ok and the process is now a bit easier. Will see how it goes. This also pointed out the amount of code behind ifdefs should be minimized by using the build system and 'constexpr if' when possible. Change-Id: Ic63fa33c65e5ff40b58858e15fc51f27d862e20d Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211349 Commit-Queue: Ben Wagner <bungeman@google.com> Reviewed-by: Mike Klein <mtklein@google.com>
125 lines
4.0 KiB
C++
125 lines
4.0 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/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkFilterQuality.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/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTypes.h"
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namespace skiagm {
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// This GM exercises HighQuality anisotropic filtering.
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class AnisotropicGM : public GM {
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public:
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AnisotropicGM() : fFilterQuality(kHigh_SkFilterQuality) {
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this->setBGColor(0xFFCCCCCC);
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}
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protected:
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SkString onShortName() override { return SkString("anisotropic_hq"); }
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SkISize onISize() override {
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return SkISize::Make(2*kImageSize + 3*kSpacer,
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kNumVertImages*kImageSize + (kNumVertImages+1)*kSpacer);
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}
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// Create an image consisting of lines radiating from its center
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void onOnceBeforeDraw() override {
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constexpr int kNumLines = 100;
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constexpr SkScalar kAngleStep = 360.0f / kNumLines;
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constexpr int kInnerOffset = 10;
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fBM.allocN32Pixels(kImageSize, kImageSize, true);
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SkCanvas canvas(fBM);
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canvas.clear(SK_ColorWHITE);
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SkPaint p;
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p.setAntiAlias(true);
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SkScalar angle = 0.0f, sin, cos;
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canvas.translate(kImageSize/2.0f, kImageSize/2.0f);
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for (int i = 0; i < kNumLines; ++i, angle += kAngleStep) {
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sin = SkScalarSin(angle);
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cos = SkScalarCos(angle);
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canvas.drawLine(cos * kInnerOffset, sin * kInnerOffset,
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cos * kImageSize/2, sin * kImageSize/2, p);
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}
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}
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void draw(SkCanvas* canvas, int x, int y, int xSize, int ySize) {
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SkRect r = SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
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SkIntToScalar(xSize), SkIntToScalar(ySize));
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SkPaint p;
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p.setFilterQuality(fFilterQuality);
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canvas->drawBitmapRect(fBM, r, &p);
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}
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void onDraw(SkCanvas* canvas) override {
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SkScalar gScales[] = { 0.9f, 0.8f, 0.75f, 0.6f, 0.5f, 0.4f, 0.25f, 0.2f, 0.1f };
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SkASSERT(kNumVertImages-1 == (int)SK_ARRAY_COUNT(gScales)/2);
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// Minimize vertically
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for (int i = 0; i < (int)SK_ARRAY_COUNT(gScales); ++i) {
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int height = SkScalarFloorToInt(fBM.height() * gScales[i]);
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int yOff;
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if (i <= (int)SK_ARRAY_COUNT(gScales)/2) {
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yOff = kSpacer + i * (fBM.height() + kSpacer);
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} else {
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// Position the more highly squashed images with their less squashed counterparts
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yOff = (SK_ARRAY_COUNT(gScales) - i) * (fBM.height() + kSpacer) - height;
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}
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this->draw(canvas, kSpacer, yOff, fBM.width(), height);
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}
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// Minimize horizontally
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for (int i = 0; i < (int)SK_ARRAY_COUNT(gScales); ++i) {
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int width = SkScalarFloorToInt(fBM.width() * gScales[i]);
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int xOff, yOff;
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if (i <= (int)SK_ARRAY_COUNT(gScales)/2) {
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xOff = fBM.width() + 2*kSpacer;
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yOff = kSpacer + i * (fBM.height() + kSpacer);
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} else {
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// Position the more highly squashed images with their less squashed counterparts
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xOff = fBM.width() + 2*kSpacer + fBM.width() - width;
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yOff = kSpacer + (SK_ARRAY_COUNT(gScales) - i - 1) * (fBM.height() + kSpacer);
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}
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this->draw(canvas, xOff, yOff, width, fBM.height());
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}
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}
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private:
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static constexpr int kImageSize = 256;
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static constexpr int kSpacer = 10;
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static constexpr int kNumVertImages = 5;
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SkBitmap fBM;
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SkFilterQuality fFilterQuality;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new AnisotropicGM;)
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}
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