diff options
author | robertphillips <robertphillips@google.com> | 2015-04-28 07:42:04 -0700 |
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committer | Commit bot <commit-bot@chromium.org> | 2015-04-28 07:42:04 -0700 |
commit | 7272935744670aebf82699c2f91aaff3cd4c3172 (patch) | |
tree | 5eb8b4ed512b7ce12d144c9cdcb04f942023b42c /gm/convex_all_line_paths.cpp | |
parent | 8f94bb2b25a30917746c5180614e58253c76ae77 (diff) |
Add new GM/bench for line-only convex paths
BUG=472723
Review URL: https://codereview.chromium.org/1112603002
Diffstat (limited to 'gm/convex_all_line_paths.cpp')
-rw-r--r-- | gm/convex_all_line_paths.cpp | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/gm/convex_all_line_paths.cpp b/gm/convex_all_line_paths.cpp new file mode 100644 index 0000000000..d56325b7db --- /dev/null +++ b/gm/convex_all_line_paths.cpp @@ -0,0 +1,321 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "gm.h" + +static void create_ngon(int n, SkPoint* pts, SkScalar width, SkScalar height) { + float angleStep = 360.0f / n, angle = 0.0f, sin, cos; + if ((n % 2) == 1) { + angle = angleStep/2.0f; + } + + for (int i = 0; i < n; ++i) { + sin = SkScalarSinCos(SkDegreesToRadians(angle), &cos); + pts[i].fX = -sin * width; + pts[i].fY = cos * height; + angle += angleStep; + } +} + +namespace skiagm { + +// This GM is intended to exercise Ganesh's handling of convex line-only +// paths +class ConvexLineOnlyPathsGM : public GM { +public: + ConvexLineOnlyPathsGM() { + fOffset.set(0, SkScalarHalf(kMaxPathHeight)); + this->setBGColor(0xFFFFFFFF); + } + +protected: + SkString onShortName() override { return SkString("convex-lineonly-paths"); } + SkISize onISize() override { return SkISize::Make(kGMWidth, kGMHeight); } + bool runAsBench() const override { return true; } + + static SkPath GetPath(int index, int offset, SkPath::Direction dir) { + // narrow rect + const SkPoint gPoints0[] = { + { -1.5f, -50.0f }, + { 1.5f, -50.0f }, + { 1.5f, 50.0f }, + { -1.5f, 50.0f } + }; + // narrow rect on an angle + const SkPoint gPoints1[] = { + { -50.0f, -49.0f }, + { -49.0f, -50.0f }, + { 50.0f, 49.0f }, + { 49.0f, 50.0f } + }; + // trap - narrow on top - wide on bottom + const SkPoint gPoints2[] = { + { -10.0f, -50.0f }, + { 10.0f, -50.0f }, + { 50.0f, 50.0f }, + { -50.0f, 50.0f } + }; + // wide skewed rect + const SkPoint gPoints3[] = { + { -50.0f, -50.0f }, + { 0.0f, -50.0f }, + { 50.0f, 50.0f }, + { 0.0f, 50.0f } + }; + // thin rect with colinear-ish lines + const SkPoint gPoints4[] = { + { -6.0f, -50.0f }, + { 4.0f, -50.0f }, + { 5.0f, -25.0f }, + { 6.0f, 0.0f }, + { 5.0f, 25.0f }, + { 4.0f, 50.0f }, + { -4.0f, 50.0f } + }; + // degenerate + const SkPoint gPoints5[] = { + { -0.025f, -0.025f }, + { 0.025f, -0.025f }, + { 0.025f, 0.025f }, + { -0.025f, 0.025f } + }; + // Triangle in which the first point should fuse with last + const SkPoint gPoints6[] = { + { -20.0f, -13.0f }, + { -20.0f, -13.05f }, + { 20.0f, -13.0f }, + { 20.0f, 27.0f } + }; + // thin rect with colinear lines + const SkPoint gPoints7[] = { + { -10.0f, -50.0f }, + { 10.0f, -50.0f }, + { 10.0f, -25.0f }, + { 10.0f, 0.0f }, + { 10.0f, 25.0f }, + { 10.0f, 50.0f }, + { -10.0f, 50.0f } + }; + // capped teardrop + const SkPoint gPoints8[] = { + { 50.00f, 50.00f }, + { 0.00f, 50.00f }, + { -15.45f, 47.55f }, + { -29.39f, 40.45f }, + { -40.45f, 29.39f }, + { -47.55f, 15.45f }, + { -50.00f, 0.00f }, + { -47.55f, -15.45f }, + { -40.45f, -29.39f }, + { -29.39f, -40.45f }, + { -15.45f, -47.55f }, + { 0.00f, -50.00f }, + { 50.00f, -50.00f } + }; + // teardrop + const SkPoint gPoints9[] = { + { 4.39f, 40.45f }, + { -9.55f, 47.55f }, + { -25.00f, 50.00f }, + { -40.45f, 47.55f }, + { -54.39f, 40.45f }, + { -65.45f, 29.39f }, + { -72.55f, 15.45f }, + { -75.00f, 0.00f }, + { -72.55f, -15.45f }, + { -65.45f, -29.39f }, + { -54.39f, -40.45f }, + { -40.45f, -47.55f }, + { -25.0f, -50.0f }, + { -9.55f, -47.55f }, + { 4.39f, -40.45f }, + { 75.00f, 0.00f } + }; + // clipped triangle + const SkPoint gPoints10[] = { + { -10.0f, -50.0f }, + { 10.0f, -50.0f }, + { 50.0f, 31.0f }, + { 40.0f, 50.0f }, + { -40.0f, 50.0f }, + { -50.0f, 31.0f }, + }; + + const SkPoint* gPoints[] = { + gPoints0, gPoints1, gPoints2, gPoints3, gPoints4, gPoints5, gPoints6, + gPoints7, gPoints8, gPoints9, gPoints10, + }; + + const size_t gSizes[] = { + SK_ARRAY_COUNT(gPoints0), + SK_ARRAY_COUNT(gPoints1), + SK_ARRAY_COUNT(gPoints2), + SK_ARRAY_COUNT(gPoints3), + SK_ARRAY_COUNT(gPoints4), + SK_ARRAY_COUNT(gPoints5), + SK_ARRAY_COUNT(gPoints6), + SK_ARRAY_COUNT(gPoints7), + SK_ARRAY_COUNT(gPoints8), + SK_ARRAY_COUNT(gPoints9), + SK_ARRAY_COUNT(gPoints10), + }; + SK_COMPILE_ASSERT(SK_ARRAY_COUNT(gSizes) == SK_ARRAY_COUNT(gPoints), array_mismatch); + + SkAutoTDelete<SkPoint> data; + const SkPoint* points; + int numPts; + if (index < (int) SK_ARRAY_COUNT(gPoints)) { + // manually specified + points = gPoints[index]; + numPts = (int) gSizes[index]; + } else { + // procedurally generated + SkScalar width = kMaxPathHeight/2; + SkScalar height = kMaxPathHeight/2; + switch (index-SK_ARRAY_COUNT(gPoints)) { + case 0: + numPts = 3; + break; + case 1: + numPts = 4; + break; + case 2: + numPts = 5; + break; + case 3: // squashed pentagon + numPts = 5; + width = kMaxPathHeight/5; + break; + case 4: + numPts = 6; + break; + case 5: + numPts = 8; + break; + case 6: // squashed octogon + numPts = 8; + width = kMaxPathHeight/5; + break; + case 7: + numPts = 20; + break; + case 8: + numPts = 100; + break; + default: + numPts = 3; + break; + } + + data.reset(SkNEW_ARRAY(SkPoint, numPts)); + + create_ngon(numPts, data.get(), width, height); + points = data.get(); + } + + SkPath path; + + if (SkPath::kCW_Direction == dir) { + path.moveTo(points[0]); + for (int i = 1; i < numPts; ++i) { + path.lineTo(points[i]); + } + } else { + path.moveTo(points[numPts-1]); + for (int i = numPts-2; i >= 0; --i) { + path.lineTo(points[i]); + } + } + + path.close(); +#ifdef SK_DEBUG + // Each path this method returns should be convex, only composed of + // lines, wound the right direction, and short enough to fit in one + // of the GMs rows. + SkASSERT(path.isConvex()); + SkASSERT(SkPath::kLine_SegmentMask == path.getSegmentMasks()); + SkPath::Direction actualDir; + SkASSERT(path.cheapComputeDirection(&actualDir)); + SkASSERT(dir == actualDir); + SkRect bounds = path.getBounds(); + SkASSERT(SkScalarNearlyEqual(bounds.centerX(), 0.0f)); + SkASSERT(bounds.height() <= kMaxPathHeight); +#endif + return path; + } + + // Draw a single path several times, shrinking it, flipping its direction + // and changing its start vertex each time. + void drawPath(SkCanvas* canvas, int index) { + + SkPoint center; + { + SkPath path = GetPath(index, 0, SkPath::kCW_Direction); + if (fOffset.fX+path.getBounds().width() > kGMWidth) { + fOffset.fX = 0; + fOffset.fY += kMaxPathHeight; + } + center = { fOffset.fX + SkScalarHalf(path.getBounds().width()), fOffset.fY}; + fOffset.fX += path.getBounds().width(); + } + + const SkColor colors[2] = { SK_ColorBLACK, SK_ColorWHITE }; + const SkPath::Direction dirs[2] = { SkPath::kCW_Direction, SkPath::kCCW_Direction }; + const float scales[] = { 1.0f, 0.75f, 0.5f, 0.25f, 0.1f, 0.01f, 0.001f }; + + SkPaint paint; + paint.setAntiAlias(true); + + for (size_t i = 0; i < SK_ARRAY_COUNT(scales); ++i) { + SkPath path = GetPath(index, (int) i, dirs[i%2]); + + canvas->save(); + canvas->translate(center.fX, center.fY); + canvas->scale(scales[i], scales[i]); + paint.setColor(colors[i%2]); + canvas->drawPath(path, paint); + canvas->restore(); + } + } + + void onDraw(SkCanvas* canvas) override { + for (int i = 0; i < kNumPaths; ++i) { + this->drawPath(canvas, i); + } + + // Repro for crbug.com/472723 (Missing AA on portions of graphic with GPU rasterization) + { + canvas->translate(356.0f, 50.0f); + + SkPaint p; + p.setAntiAlias(true); + + SkPath p1; + p1.moveTo(60.8522949f, 364.671021f); + p1.lineTo(59.4380493f, 364.671021f); + p1.lineTo(385.414276f, 690.647217f); + p1.lineTo(386.121399f, 689.940125f); + canvas->drawPath(p1, p); + } + } + +private: + static const int kNumPaths = 20; + static const int kMaxPathHeight = 100; + static const int kGMWidth = 512; + static const int kGMHeight = 512; + + SkPoint fOffset; // the right edge of the last drawn path + + typedef GM INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +DEF_GM( return SkNEW(ConvexLineOnlyPathsGM); ) + +} |