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- /*
- * Copyright 2019 Google LLC
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkScalar.h"
- #include "src/gpu/geometry/GrQuad.h"
- #include "src/gpu/geometry/GrQuadUtils.h"
- #include "tests/Test.h"
- #define ASSERT(cond) REPORTER_ASSERT(r, cond)
- #define ASSERTF(cond, ...) REPORTER_ASSERT(r, cond, __VA_ARGS__)
- #define TEST(name) DEF_TEST(GrQuadCrop##name, r)
- #define ASSERT_NEARLY_EQUAL(expected, actual) \
- ASSERTF(SkScalarNearlyEqual(expected, actual), "expected: %f, actual: %f", \
- expected, actual)
- // Make the base rect contain the origin and have unique edge values so that each transform
- // produces a different axis-aligned rectangle.
- static const SkRect kDrawRect = SkRect::MakeLTRB(-5.f, -6.f, 10.f, 11.f);
- static void run_crop_axis_aligned_test(skiatest::Reporter* r, const SkRect& clipRect, GrAA clipAA,
- const SkMatrix& viewMatrix, const SkMatrix* localMatrix) {
- // Should use run_crop_fully_covers_test for non-rect matrices
- SkASSERT(viewMatrix.rectStaysRect());
- GrQuad drawQuad = GrQuad::MakeFromRect(kDrawRect, viewMatrix);
- GrQuad localQuad = GrQuad::MakeFromRect(kDrawRect, localMatrix ? *localMatrix : SkMatrix::I());
- GrQuad* localQuadPtr = localMatrix ? &localQuad : nullptr;
- GrQuadAAFlags edgeFlags = clipAA == GrAA::kYes ? GrQuadAAFlags::kNone : GrQuadAAFlags::kAll;
- bool exact = GrQuadUtils::CropToRect(clipRect, clipAA, &edgeFlags, &drawQuad, localQuadPtr);
- ASSERTF(exact, "Expected exact crop");
- ASSERTF(drawQuad.quadType() == GrQuad::Type::kAxisAligned,
- "Expected quad to remain axis-aligned");
- // Since we remained a rectangle, the bounds will exactly match the coordinates
- SkRect expectedBounds = viewMatrix.mapRect(kDrawRect);
- SkAssertResult(expectedBounds.intersect(clipRect));
- SkRect actualBounds = drawQuad.bounds();
- ASSERT_NEARLY_EQUAL(expectedBounds.fLeft, actualBounds.fLeft);
- ASSERT_NEARLY_EQUAL(expectedBounds.fTop, actualBounds.fTop);
- ASSERT_NEARLY_EQUAL(expectedBounds.fRight, actualBounds.fRight);
- ASSERT_NEARLY_EQUAL(expectedBounds.fBottom, actualBounds.fBottom);
- // Confirm that local coordinates match up with clipped edges and the transform
- SkMatrix invViewMatrix;
- SkAssertResult(viewMatrix.invert(&invViewMatrix));
- if (localMatrix) {
- SkMatrix toLocal = SkMatrix::Concat(*localMatrix, invViewMatrix);
- for (int p = 0; p < 4; ++p) {
- SkPoint expectedPoint = drawQuad.point(p);
- toLocal.mapPoints(&expectedPoint, 1);
- SkPoint actualPoint = localQuad.point(p);
- ASSERT_NEARLY_EQUAL(expectedPoint.fX, actualPoint.fX);
- ASSERT_NEARLY_EQUAL(expectedPoint.fY, actualPoint.fY);
- }
- }
- // Confirm that the edge flags match, by mapping clip rect to drawRect space and
- // comparing to the original draw rect edges
- SkRect drawClip = invViewMatrix.mapRect(clipRect);
- if (drawClip.fLeft > kDrawRect.fLeft) {
- if (clipAA == GrAA::kYes) {
- ASSERTF(edgeFlags & GrQuadAAFlags::kLeft, "Expected left edge AA set");
- } else {
- ASSERTF(!(edgeFlags & GrQuadAAFlags::kLeft), "Expected left edge AA unset");
- }
- }
- if (drawClip.fRight < kDrawRect.fRight) {
- if (clipAA == GrAA::kYes) {
- ASSERTF(edgeFlags & GrQuadAAFlags::kRight, "Expected right edge AA set");
- } else {
- ASSERTF(!(edgeFlags & GrQuadAAFlags::kRight), "Expected right edge AA unset");
- }
- }
- if (drawClip.fTop > kDrawRect.fTop) {
- if (clipAA == GrAA::kYes) {
- ASSERTF(edgeFlags & GrQuadAAFlags::kTop, "Expected top edge AA set");
- } else {
- ASSERTF(!(edgeFlags & GrQuadAAFlags::kTop), "Expected top edge AA unset");
- }
- }
- if (drawClip.fBottom < kDrawRect.fBottom) {
- if (clipAA == GrAA::kYes) {
- ASSERTF(edgeFlags & GrQuadAAFlags::kBottom, "Expected bottom edge AA set");
- } else {
- ASSERTF(!(edgeFlags & GrQuadAAFlags::kBottom), "Expected bottom edge AA unset");
- }
- }
- }
- static void run_crop_fully_covered_test(skiatest::Reporter* r, GrAA clipAA,
- const SkMatrix& viewMatrix, const SkMatrix* localMatrix) {
- // Should use run_crop_axis_aligned for rect transforms since that verifies more behavior
- SkASSERT(!viewMatrix.rectStaysRect());
- // Test what happens when the geometry fully covers the crop rect. Given a fixed crop,
- // use the provided view matrix to derive the "input" geometry that we know covers the crop.
- SkMatrix invViewMatrix;
- SkAssertResult(viewMatrix.invert(&invViewMatrix));
- SkRect containsCrop = kDrawRect; // Use kDrawRect as the crop rect for this test
- containsCrop.outset(10.f, 10.f);
- SkRect drawRect = invViewMatrix.mapRect(containsCrop);
- GrQuad drawQuad = GrQuad::MakeFromRect(drawRect, viewMatrix);
- GrQuadAAFlags edgeFlags = clipAA == GrAA::kYes ? GrQuadAAFlags::kNone : GrQuadAAFlags::kAll;
- if (localMatrix) {
- GrQuad localQuad = GrQuad::MakeFromRect(drawRect, *localMatrix);
- GrQuad originalDrawQuad = drawQuad;
- GrQuad originalLocalQuad = localQuad;
- GrQuadAAFlags originalEdgeFlags = edgeFlags;
- bool exact = GrQuadUtils::CropToRect(kDrawRect, clipAA, &edgeFlags, &drawQuad, &localQuad);
- // Currently non-rect matrices don't know how to update local coordinates, so the crop
- // doesn't know how to restrict itself and should leave the inputs unmodified
- ASSERTF(!exact, "Expected crop to be not exact");
- ASSERTF(edgeFlags == originalEdgeFlags, "Expected edge flags not to be modified");
- for (int i = 0; i < 4; ++i) {
- ASSERT_NEARLY_EQUAL(originalDrawQuad.x(i), drawQuad.x(i));
- ASSERT_NEARLY_EQUAL(originalDrawQuad.y(i), drawQuad.y(i));
- ASSERT_NEARLY_EQUAL(originalDrawQuad.w(i), drawQuad.w(i));
- ASSERT_NEARLY_EQUAL(originalLocalQuad.x(i), localQuad.x(i));
- ASSERT_NEARLY_EQUAL(originalLocalQuad.y(i), localQuad.y(i));
- ASSERT_NEARLY_EQUAL(originalLocalQuad.w(i), localQuad.w(i));
- }
- } else {
- // Since no local coordinates were provided, and the input draw geometry is known to
- // fully cover the crop rect, the quad should be updated to match cropRect exactly
- bool exact = GrQuadUtils::CropToRect(kDrawRect, clipAA, &edgeFlags, &drawQuad, nullptr);
- ASSERTF(exact, "Expected crop to be exact");
- GrQuadAAFlags expectedFlags = clipAA == GrAA::kYes ? GrQuadAAFlags::kAll
- : GrQuadAAFlags::kNone;
- ASSERTF(expectedFlags == edgeFlags, "Expected edge flags do not match clip AA setting");
- ASSERTF(drawQuad.quadType() == GrQuad::Type::kAxisAligned, "Unexpected quad type");
- ASSERT_NEARLY_EQUAL(kDrawRect.fLeft, drawQuad.x(0));
- ASSERT_NEARLY_EQUAL(kDrawRect.fTop, drawQuad.y(0));
- ASSERT_NEARLY_EQUAL(1.f, drawQuad.w(0));
- ASSERT_NEARLY_EQUAL(kDrawRect.fLeft, drawQuad.x(1));
- ASSERT_NEARLY_EQUAL(kDrawRect.fBottom, drawQuad.y(1));
- ASSERT_NEARLY_EQUAL(1.f, drawQuad.w(1));
- ASSERT_NEARLY_EQUAL(kDrawRect.fRight, drawQuad.x(2));
- ASSERT_NEARLY_EQUAL(kDrawRect.fTop, drawQuad.y(2));
- ASSERT_NEARLY_EQUAL(1.f, drawQuad.w(2));
- ASSERT_NEARLY_EQUAL(kDrawRect.fRight, drawQuad.x(3));
- ASSERT_NEARLY_EQUAL(kDrawRect.fBottom, drawQuad.y(3));
- ASSERT_NEARLY_EQUAL(1.f, drawQuad.w(3));
- }
- }
- static void test_axis_aligned_all_clips(skiatest::Reporter* r, const SkMatrix& viewMatrix,
- const SkMatrix* localMatrix) {
- static const float kInsideEdge = SkScalarAbs(kDrawRect.fLeft) - 1.f;
- static const float kOutsideEdge = SkScalarAbs(kDrawRect.fBottom) + 1.f;
- static const float kIntersectEdge = SkScalarAbs(kDrawRect.fTop) + 1.f;
- static const SkRect kInsideClipRect = SkRect::MakeLTRB(-kInsideEdge, -kInsideEdge,
- kInsideEdge, kInsideEdge);
- static const SkRect kContainsClipRect = SkRect::MakeLTRB(-kOutsideEdge, -kOutsideEdge,
- kOutsideEdge, kOutsideEdge);
- static const SkRect kXYAxesClipRect = SkRect::MakeLTRB(-kIntersectEdge, -kIntersectEdge,
- kIntersectEdge, kIntersectEdge);
- static const SkRect kXAxisClipRect = SkRect::MakeLTRB(-kIntersectEdge, -kOutsideEdge,
- kIntersectEdge, kOutsideEdge);
- static const SkRect kYAxisClipRect = SkRect::MakeLTRB(-kOutsideEdge, -kIntersectEdge,
- kOutsideEdge, kIntersectEdge);
- run_crop_axis_aligned_test(r, kInsideClipRect, GrAA::kNo, viewMatrix, localMatrix);
- run_crop_axis_aligned_test(r, kContainsClipRect, GrAA::kNo, viewMatrix, localMatrix);
- run_crop_axis_aligned_test(r, kXYAxesClipRect, GrAA::kNo, viewMatrix, localMatrix);
- run_crop_axis_aligned_test(r, kXAxisClipRect, GrAA::kNo, viewMatrix, localMatrix);
- run_crop_axis_aligned_test(r, kYAxisClipRect, GrAA::kNo, viewMatrix, localMatrix);
- run_crop_axis_aligned_test(r, kInsideClipRect, GrAA::kYes, viewMatrix, localMatrix);
- run_crop_axis_aligned_test(r, kContainsClipRect, GrAA::kYes, viewMatrix, localMatrix);
- run_crop_axis_aligned_test(r, kXYAxesClipRect, GrAA::kYes, viewMatrix, localMatrix);
- run_crop_axis_aligned_test(r, kXAxisClipRect, GrAA::kYes, viewMatrix, localMatrix);
- run_crop_axis_aligned_test(r, kYAxisClipRect, GrAA::kYes, viewMatrix, localMatrix);
- }
- static void test_axis_aligned(skiatest::Reporter* r, const SkMatrix& viewMatrix) {
- test_axis_aligned_all_clips(r, viewMatrix, nullptr);
- SkMatrix normalized = SkMatrix::MakeRectToRect(kDrawRect, SkRect::MakeWH(1.f, 1.f),
- SkMatrix::kFill_ScaleToFit);
- test_axis_aligned_all_clips(r, viewMatrix, &normalized);
- SkMatrix rotated;
- rotated.setRotate(45.f);
- test_axis_aligned_all_clips(r, viewMatrix, &rotated);
- SkMatrix perspective;
- perspective.setPerspY(0.001f);
- perspective.setSkewX(8.f / 25.f);
- test_axis_aligned_all_clips(r, viewMatrix, &perspective);
- }
- static void test_crop_fully_covered(skiatest::Reporter* r, const SkMatrix& viewMatrix) {
- run_crop_fully_covered_test(r, GrAA::kNo, viewMatrix, nullptr);
- run_crop_fully_covered_test(r, GrAA::kYes, viewMatrix, nullptr);
- SkMatrix normalized = SkMatrix::MakeRectToRect(kDrawRect, SkRect::MakeWH(1.f, 1.f),
- SkMatrix::kFill_ScaleToFit);
- run_crop_fully_covered_test(r, GrAA::kNo, viewMatrix, &normalized);
- run_crop_fully_covered_test(r, GrAA::kYes, viewMatrix, &normalized);
- SkMatrix rotated;
- rotated.setRotate(45.f);
- run_crop_fully_covered_test(r, GrAA::kNo, viewMatrix, &rotated);
- run_crop_fully_covered_test(r, GrAA::kYes, viewMatrix, &rotated);
- SkMatrix perspective;
- perspective.setPerspY(0.001f);
- perspective.setSkewX(8.f / 25.f);
- run_crop_fully_covered_test(r, GrAA::kNo, viewMatrix, &perspective);
- run_crop_fully_covered_test(r, GrAA::kYes, viewMatrix, &perspective);
- }
- TEST(AxisAligned) {
- test_axis_aligned(r, SkMatrix::I());
- test_axis_aligned(r, SkMatrix::MakeScale(-1.f, 1.f));
- test_axis_aligned(r, SkMatrix::MakeScale(1.f, -1.f));
- SkMatrix rotation;
- rotation.setRotate(90.f);
- test_axis_aligned(r, rotation);
- rotation.setRotate(180.f);
- test_axis_aligned(r, rotation);
- rotation.setRotate(270.f);
- test_axis_aligned(r, rotation);
- }
- TEST(FullyCovered) {
- SkMatrix rotation;
- rotation.setRotate(34.f);
- test_crop_fully_covered(r, rotation);
- SkMatrix skew;
- skew.setSkewX(0.3f);
- skew.setSkewY(0.04f);
- test_crop_fully_covered(r, skew);
- SkMatrix perspective;
- perspective.setPerspX(0.001f);
- perspective.setSkewY(8.f / 25.f);
- test_crop_fully_covered(r, perspective);
- }
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