// Returns whether or not the gpu can fast path the dash line effect.
static bool can_fast_path_dash(const SkPoint pts[2], const GrStrokeInfo& strokeInfo,
const GrDrawTarget& target, const SkMatrix& viewMatrix) {
if (target.getDrawState().getRenderTarget()->isMultisampled()) {
return false;
}
// Pts must be either horizontal or vertical in src space
if (pts[0].fX != pts[1].fX && pts[0].fY != pts[1].fY) {
return false;
}
// May be able to relax this to include skew. As of now cannot do perspective
// because of the non uniform scaling of bloating a rect
if (!viewMatrix.preservesRightAngles()) {
return false;
}
if (!strokeInfo.isDashed() || 2 != strokeInfo.dashCount()) {
return false;
}
const SkPathEffect::DashInfo& info = strokeInfo.getDashInfo();
if (0 == info.fIntervals[0] && 0 == info.fIntervals[1]) {
return false;
}
SkPaint::Cap cap = strokeInfo.getStrokeRec().getCap();
// Current we do don't handle Round or Square cap dashes
if (SkPaint::kRound_Cap == cap && info.fIntervals[0] != 0.f) {
return false;
}
return true;
}
void draw(SkCanvas* canvas) {
SkPaint p;
p.setAntiAlias(true);
SkMatrix m;
int pos = 0;
for (SkScalar sx : { 1, 2 } ) {
for (SkScalar kx : { 0, 1 } ) {
m.setAll(sx, kx, 16, 0, 1, 32, 0, 0, 1);
bool isSimilarity = m.isSimilarity();
bool preservesRightAngles = m.preservesRightAngles();
SkString str;
str.printf("sx: %g kx: %g %s %s", sx, kx, isSimilarity ? "sim" : "",
preservesRightAngles ? "right" : "");
SkAutoCanvasRestore autoRestore(canvas, true);
canvas->concat(m);
canvas->drawString(str, 0, pos, p);
pos += 20;
}
}
}
inline bool InstancedRendering::selectAntialiasMode(const SkMatrix& viewMatrix, bool antialias,
const GrInstancedPipelineInfo& info,
bool* useHWAA, AntialiasMode* antialiasMode) {
SkASSERT(!info.fColorDisabled || info.fDrawingShapeToStencil);
SkASSERT(!info.fIsMixedSampled || info.fIsMultisampled);
if (!info.fIsMultisampled || fGpu->caps()->multisampleDisableSupport()) {
SkASSERT(fLastSupportedAAMode >= AntialiasMode::kCoverage);
if (!antialias) {
if (info.fDrawingShapeToStencil && !info.fCanDiscard) {
// We can't draw to the stencil buffer without discard (or sample mask if MSAA).
return false;
}
*antialiasMode = AntialiasMode::kNone;
*useHWAA = false;
return true;
}
if (info.canUseCoverageAA() && viewMatrix.preservesRightAngles()) {
*antialiasMode = AntialiasMode::kCoverage;
*useHWAA = false;
return true;
}
}
if (info.fIsMultisampled && fLastSupportedAAMode >= AntialiasMode::kMSAA) {
if (!info.fIsMixedSampled || info.fColorDisabled) {
*antialiasMode = AntialiasMode::kMSAA;
*useHWAA = true;
return true;
}
if (fLastSupportedAAMode >= AntialiasMode::kMixedSamples) {
*antialiasMode = AntialiasMode::kMixedSamples;
*useHWAA = true;
return true;
}
}
return false;
}
static bool apply_aa_to_rect(GrDrawTarget* target,
GrPipelineBuilder* pipelineBuilder,
SkRect* devBoundRect,
const SkRect& rect,
SkScalar strokeWidth,
const SkMatrix& combinedMatrix,
GrColor color) {
if (pipelineBuilder->getRenderTarget()->isUnifiedMultisampled()) {
return false;
}
#if defined(SHADER_AA_FILL_RECT) || !defined(IGNORE_ROT_AA_RECT_OPT)
if (strokeWidth >= 0) {
#endif
if (!combinedMatrix.preservesAxisAlignment()) {
return false;
}
#if defined(SHADER_AA_FILL_RECT) || !defined(IGNORE_ROT_AA_RECT_OPT)
} else {
if (!combinedMatrix.preservesRightAngles()) {
return false;
}
}
#endif
combinedMatrix.mapRect(devBoundRect, rect);
if (!combinedMatrix.rectStaysRect()) {
return true;
}
if (strokeWidth < 0) {
return !is_irect(*devBoundRect);
}
return true;
}
static inline bool view_matrix_ok_for_aa_fill_rect(const SkMatrix& viewMatrix) {
return viewMatrix.preservesRightAngles();
}
static void test_matrix_preserve_shape(skiatest::Reporter* reporter) {
SkMatrix mat;
// identity
mat.setIdentity();
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// translation only
mat.reset();
mat.setTranslate(SkIntToScalar(100), SkIntToScalar(100));
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// scale with same size
mat.reset();
mat.setScale(SkIntToScalar(15), SkIntToScalar(15));
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// scale with one negative
mat.reset();
mat.setScale(SkIntToScalar(-15), SkIntToScalar(15));
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// scale with different size
mat.reset();
mat.setScale(SkIntToScalar(15), SkIntToScalar(20));
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// scale with same size at a pivot point
mat.reset();
mat.setScale(SkIntToScalar(15), SkIntToScalar(15),
SkIntToScalar(2), SkIntToScalar(2));
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// scale with different size at a pivot point
mat.reset();
mat.setScale(SkIntToScalar(15), SkIntToScalar(20),
SkIntToScalar(2), SkIntToScalar(2));
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// skew with same size
mat.reset();
mat.setSkew(SkIntToScalar(15), SkIntToScalar(15));
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, !mat.preservesRightAngles());
// skew with different size
mat.reset();
mat.setSkew(SkIntToScalar(15), SkIntToScalar(20));
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, !mat.preservesRightAngles());
// skew with same size at a pivot point
mat.reset();
mat.setSkew(SkIntToScalar(15), SkIntToScalar(15),
SkIntToScalar(2), SkIntToScalar(2));
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, !mat.preservesRightAngles());
// skew with different size at a pivot point
mat.reset();
mat.setSkew(SkIntToScalar(15), SkIntToScalar(20),
SkIntToScalar(2), SkIntToScalar(2));
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, !mat.preservesRightAngles());
// perspective x
mat.reset();
mat.setPerspX(SK_Scalar1 / 2);
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, !mat.preservesRightAngles());
// perspective y
mat.reset();
mat.setPerspY(SK_Scalar1 / 2);
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, !mat.preservesRightAngles());
// rotate
for (int angle = 0; angle < 360; ++angle) {
mat.reset();
mat.setRotate(SkIntToScalar(angle));
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
}
// see if there are any accumulated precision issues
mat.reset();
for (int i = 1; i < 360; i++) {
mat.postRotate(SkIntToScalar(1));
}
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// rotate + translate
mat.reset();
mat.setRotate(SkIntToScalar(30));
mat.postTranslate(SkIntToScalar(10), SkIntToScalar(20));
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// rotate + uniform scale
mat.reset();
mat.setRotate(SkIntToScalar(30));
mat.postScale(SkIntToScalar(2), SkIntToScalar(2));
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// rotate + non-uniform scale
mat.reset();
mat.setRotate(SkIntToScalar(30));
mat.postScale(SkIntToScalar(3), SkIntToScalar(2));
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, !mat.preservesRightAngles());
// non-uniform scale + rotate
mat.reset();
mat.setScale(SkIntToScalar(3), SkIntToScalar(2));
mat.postRotate(SkIntToScalar(30));
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// all zero
mat.setAll(0, 0, 0, 0, 0, 0, 0, 0, 0);
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, !mat.preservesRightAngles());
// all zero except perspective
mat.reset();
mat.setAll(0, 0, 0, 0, 0, 0, 0, 0, SK_Scalar1);
REPORTER_ASSERT(reporter, !mat.isSimilarity());
REPORTER_ASSERT(reporter, !mat.preservesRightAngles());
// scales zero, only skews (rotation)
mat.setAll(0, SK_Scalar1, 0,
-SK_Scalar1, 0, 0,
0, 0, SkMatrix::I()[8]);
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
// scales zero, only skews (reflection)
mat.setAll(0, SK_Scalar1, 0,
SK_Scalar1, 0, 0,
0, 0, SkMatrix::I()[8]);
REPORTER_ASSERT(reporter, mat.isSimilarity());
REPORTER_ASSERT(reporter, mat.preservesRightAngles());
}