0087c83a7c
Previously we didn't do this at all for multiple-texture ops. Improve the test detecting when filtering can be disabled. Make draw_image_set GM create tiles with pixel of overlap for correct filtering. Add draw_image_set_rect_to_rect to exercise filtering/aa disablement in combination with tiling. Makes SkGpuDevice filter out inverted src rects (as is done implicitly in SkBaseDevice by relying on drawImageRect). Puts GrTextureOp::fFilter in bitfield. Change-Id: Iee96cb54d665877c7f4aee422a3a7af2b249b1d6 Reviewed-on: https://skia-review.googlesource.com/c/161641 Commit-Queue: Brian Salomon <bsalomon@google.com> Reviewed-by: Michael Ludwig <michaelludwig@google.com>
253 lines
11 KiB
C++
253 lines
11 KiB
C++
/*
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* Copyright 2018 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 <algorithm>
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#include "SkGradientShader.h"
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#include "SkSurface.h"
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// Makes a set of m x n tiled images to be drawn with SkCanvas::experimental_drawImageSetV0().
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static void make_image_tiles(int tileW, int tileH, int m, int n, const SkColor colors[4],
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SkCanvas::ImageSetEntry set[]) {
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const int w = tileW * m;
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const int h = tileH * n;
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auto surf = SkSurface::MakeRaster(
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SkImageInfo::Make(w, h, kRGBA_8888_SkColorType, kPremul_SkAlphaType));
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surf->getCanvas()->clear(SK_ColorLTGRAY);
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static constexpr SkScalar kStripeW = 10;
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static constexpr SkScalar kStripeSpacing = 30;
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SkPaint paint;
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SkPoint pts1[] = {{0.f, 0.f}, {(SkScalar)w, (SkScalar)h}};
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auto grad = SkGradientShader::MakeLinear(pts1, colors, nullptr, 2, SkShader::kClamp_TileMode);
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paint.setShader(std::move(grad));
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paint.setAntiAlias(true);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(kStripeW);
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SkPoint stripePts[] = {{-w - kStripeW, -kStripeW}, {kStripeW, h + kStripeW}};
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while (stripePts[0].fX <= w) {
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surf->getCanvas()->drawPoints(SkCanvas::kLines_PointMode, 2, stripePts, paint);
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stripePts[0].fX += kStripeSpacing;
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stripePts[1].fX += kStripeSpacing;
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}
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SkPoint pts2[] = {{0.f, (SkScalar)h}, {(SkScalar)w, 0.f}};
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grad = SkGradientShader::MakeLinear(pts2, colors + 2, nullptr, 2, SkShader::kClamp_TileMode);
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paint.setShader(std::move(grad));
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paint.setBlendMode(SkBlendMode::kMultiply);
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stripePts[0] = {-w - kStripeW, h + kStripeW};
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stripePts[1] = {kStripeW, -kStripeW};
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while (stripePts[0].fX <= w) {
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surf->getCanvas()->drawPoints(SkCanvas::kLines_PointMode, 2, stripePts, paint);
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stripePts[0].fX += kStripeSpacing;
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stripePts[1].fX += kStripeSpacing;
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}
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auto fullImage = surf->makeImageSnapshot();
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for (int y = 0; y < n; ++y) {
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for (int x = 0; x < m; ++x) {
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// Images will have 1 pixel of overlap at interior seams for filtering continuity.
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SkIRect subset = SkIRect::MakeXYWH(x * tileW - 1, y * tileH - 1, tileW + 2, tileH + 2);
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set[y * m + x].fAAFlags = SkCanvas::kNone_QuadAAFlags;
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if (x == 0) {
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subset.fLeft = 0;
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set[y * m + x].fAAFlags |= SkCanvas::kLeft_QuadAAFlag;
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}
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if (x == m - 1) {
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subset.fRight = w;
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set[y * m + x].fAAFlags |= SkCanvas::kRight_QuadAAFlag;
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}
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if (y == 0) {
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subset.fTop = 0;
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set[y * m + x].fAAFlags |= SkCanvas::kTop_QuadAAFlag;
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}
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if (y == n - 1) {
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subset.fBottom = h;
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set[y * m + x].fAAFlags |= SkCanvas::kBottom_QuadAAFlag;
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}
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set[y * m + x].fImage = fullImage->makeSubset(subset);
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set[y * m + x].fSrcRect =
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SkRect::MakeXYWH(x == 0 ? 0 : 1, y == 0 ? 0 : 1, tileW, tileH);
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set[y * m + x].fDstRect = SkRect::MakeXYWH(x * tileW, y * tileH, tileW, tileH);
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SkASSERT(set[y * m + x].fImage);
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}
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}
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}
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namespace skiagm {
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class DrawImageSetGM : public GM {
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private:
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SkString onShortName() final { return SkString("draw_image_set"); }
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SkISize onISize() override { return SkISize::Make(1000, 725); }
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void onOnceBeforeDraw() override {
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static constexpr SkColor kColors[] = {SK_ColorCYAN, SK_ColorBLACK,
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SK_ColorMAGENTA, SK_ColorBLACK};
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make_image_tiles(kTileW, kTileH, kM, kN, kColors, fSet);
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}
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void onDraw(SkCanvas* canvas) override {
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SkScalar d = SkVector{kM * kTileW, kN * kTileH}.length();
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SkMatrix matrices[4];
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// rotation
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matrices[0].setRotate(30);
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matrices[0].postTranslate(d / 3, 0);
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// perespective
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SkPoint src[4];
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SkRect::MakeWH(kM * kTileW, kN * kTileH).toQuad(src);
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SkPoint dst[4] = {{0, 0},
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{kM * kTileW + 10.f, -5.f},
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{kM * kTileW - 28.f, kN * kTileH + 40.f},
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{45.f, kN * kTileH - 25.f}};
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SkAssertResult(matrices[1].setPolyToPoly(src, dst, 4));
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matrices[1].postTranslate(d, 50.f);
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// skew
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matrices[2].setRotate(-60.f);
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matrices[2].postSkew(0.5f, -1.15f);
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matrices[2].postScale(0.6f, 1.05f);
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matrices[2].postTranslate(d, 2.6f * d);
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// perspective + mirror in x.
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dst[1] = {-.25 * kM * kTileW, 0};
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dst[0] = {5.f / 4.f * kM * kTileW, 0};
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dst[3] = {2.f / 3.f * kM * kTileW, 1 / 2.f * kN * kTileH};
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dst[2] = {1.f / 3.f * kM * kTileW, 1 / 2.f * kN * kTileH - 0.1f * kTileH};
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SkAssertResult(matrices[3].setPolyToPoly(src, dst, 4));
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matrices[3].postTranslate(100.f, d);
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for (auto fm : {kNone_SkFilterQuality, kLow_SkFilterQuality}) {
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for (size_t m = 0; m < SK_ARRAY_COUNT(matrices); ++m) {
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// Draw grid of red lines at interior tile boundaries.
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static constexpr SkScalar kLineOutset = 10.f;
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(SK_ColorRED);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(0.f);
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for (int x = 1; x < kM; ++x) {
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SkPoint pts[] = {{x * kTileW, 0}, {x * kTileW, kN * kTileH}};
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matrices[m].mapPoints(pts, 2);
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SkVector v = pts[1] - pts[0];
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v.setLength(v.length() + kLineOutset);
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canvas->drawLine(pts[1] - v, pts[0] + v, paint);
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}
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for (int y = 1; y < kN; ++y) {
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SkPoint pts[] = {{0, y * kTileH}, {kTileW * kM, y * kTileH}};
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matrices[m].mapPoints(pts, 2);
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SkVector v = pts[1] - pts[0];
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v.setLength(v.length() + kLineOutset);
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canvas->drawLine(pts[1] - v, pts[0] + v, paint);
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}
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canvas->save();
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canvas->concat(matrices[m]);
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canvas->experimental_DrawImageSetV0(fSet, kM * kN, 1.f, fm, SkBlendMode::kSrcOver);
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canvas->restore();
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}
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// A more exotic case with an unusual blend mode, all aa flags set, and alpha,
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// subsets the image
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SkCanvas::ImageSetEntry entry;
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entry.fSrcRect = SkRect::MakeWH(kTileW, kTileH).makeInset(kTileW / 4.f, kTileH / 4.f);
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entry.fDstRect = SkRect::MakeWH(2 * kTileW, 2 * kTileH).makeOffset(d / 4, 2 * d);
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entry.fImage = fSet[0].fImage;
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entry.fAAFlags = SkCanvas::kAll_QuadAAFlags;
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canvas->save();
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canvas->rotate(3.f);
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canvas->experimental_DrawImageSetV0(&entry, 1, 0.7f, fm, SkBlendMode::kExclusion);
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canvas->restore();
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canvas->translate(2 * d, 0);
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}
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}
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static constexpr int kM = 4;
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static constexpr int kN = 3;
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static constexpr SkScalar kTileW = 30;
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static constexpr SkScalar kTileH = 60;
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SkCanvas::ImageSetEntry fSet[kM * kN];
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};
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// This GM exercises rect-stays-rect type matrices to test that filtering and antialiasing are not
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// incorrectly disabled.
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class DrawImageSetRectToRectGM : public GM {
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private:
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SkString onShortName() final { return SkString("draw_image_set_rect_to_rect"); }
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SkISize onISize() override { return SkISize::Make(1250, 850); }
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void onOnceBeforeDraw() override {
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static constexpr SkColor kColors[] = {SK_ColorBLUE, SK_ColorWHITE,
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SK_ColorRED, SK_ColorWHITE};
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make_image_tiles(kTileW, kTileH, kM, kN, kColors, fSet);
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}
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void onDraw(SkCanvas* canvas) override {
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static constexpr SkScalar kW = kM * kTileW;
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static constexpr SkScalar kH = kN * kTileH;
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SkMatrix matrices[5];
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// Identity
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matrices[0].reset();
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// 90 degree rotation
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matrices[1].setRotate(90, kW / 2.f, kH / 2.f);
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// Scaling
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matrices[2].setScale(2.f, 0.5f);
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// Mirror in x and y
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matrices[3].setScale(-1.f, -1.f);
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matrices[3].postTranslate(kW, kH);
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// Mirror in y, rotate, and scale.
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matrices[4].setScale(1.f, -1.f);
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matrices[4].postTranslate(0, kH);
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matrices[4].postRotate(90, kW / 2.f, kH / 2.f);
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matrices[4].postScale(2.f, 0.5f);
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static constexpr SkScalar kTranslate = SkTMax(kW, kH) * 2.f + 10.f;
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canvas->translate(5.f, 5.f);
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canvas->save();
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for (SkScalar frac : {0.f, 0.5f}) {
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canvas->save();
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canvas->translate(frac, frac);
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for (size_t m = 0; m < SK_ARRAY_COUNT(matrices); ++m) {
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canvas->save();
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canvas->concat(matrices[m]);
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canvas->experimental_DrawImageSetV0(fSet, kM * kN, 1.f, kLow_SkFilterQuality,
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SkBlendMode::kSrcOver);
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canvas->restore();
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canvas->translate(kTranslate, 0);
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}
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canvas->restore();
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canvas->restore();
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canvas->translate(0, kTranslate);
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canvas->save();
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}
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for (SkVector scale : {SkVector{2.f, 0.5f}, SkVector{0.5, 2.f}}) {
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SkCanvas::ImageSetEntry scaledSet[kM * kN];
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std::copy_n(fSet, kM * kN, scaledSet);
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for (int i = 0; i < kM * kN; ++i) {
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scaledSet[i].fDstRect.fLeft *= scale.fX;
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scaledSet[i].fDstRect.fTop *= scale.fY;
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scaledSet[i].fDstRect.fRight *= scale.fX;
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scaledSet[i].fDstRect.fBottom *= scale.fY;
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}
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for (size_t m = 0; m < SK_ARRAY_COUNT(matrices); ++m) {
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canvas->save();
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canvas->concat(matrices[m]);
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canvas->experimental_DrawImageSetV0(scaledSet, kM * kN, 1.f, kLow_SkFilterQuality,
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SkBlendMode::kSrcOver);
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canvas->restore();
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canvas->translate(kTranslate, 0);
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}
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canvas->restore();
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canvas->translate(0, kTranslate);
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canvas->save();
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}
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}
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static constexpr int kM = 2;
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static constexpr int kN = 2;
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static constexpr int kTileW = 40;
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static constexpr int kTileH = 50;
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SkCanvas::ImageSetEntry fSet[kM * kN];
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};
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DEF_GM(return new DrawImageSetGM();)
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DEF_GM(return new DrawImageSetRectToRectGM();)
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} // namespace skiagm
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