SkMatrix SkPDFDevice::setTransform(const SkMatrix& m) {
SkMatrix old = fGraphicStack[fGraphicStackIndex].fTransform;
if (old == m)
return old;
if (old.getType() != SkMatrix::kIdentity_Mask) {
SkASSERT(fGraphicStackIndex > 0);
SkASSERT(fGraphicStack[fGraphicStackIndex - 1].fTransform.getType() ==
SkMatrix::kIdentity_Mask);
SkASSERT(fGraphicStack[fGraphicStackIndex].fClip ==
fGraphicStack[fGraphicStackIndex - 1].fClip);
popGS();
}
if (m.getType() == SkMatrix::kIdentity_Mask)
return old;
if (fGraphicStackIndex == 0 || fGraphicStack[fGraphicStackIndex].fClip !=
fGraphicStack[fGraphicStackIndex - 1].fClip)
pushGS();
SkScalar transform[6];
SkAssertResult(m.pdfTransform(transform));
for (size_t i = 0; i < SK_ARRAY_COUNT(transform); i++) {
SkPDFScalar::Append(transform[i], &fContent);
fContent.writeText(" ");
}
fContent.writeText("cm\n");
fGraphicStack[fGraphicStackIndex].fTransform = m;
return old;
}
static void test_matrix_recttorect(skiatest::Reporter* reporter) {
SkRect src, dst;
SkMatrix matrix;
src.set(0, 0, SK_Scalar1*10, SK_Scalar1*10);
dst = src;
matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
REPORTER_ASSERT(reporter, SkMatrix::kIdentity_Mask == matrix.getType());
REPORTER_ASSERT(reporter, matrix.rectStaysRect());
dst.offset(SK_Scalar1, SK_Scalar1);
matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
REPORTER_ASSERT(reporter, SkMatrix::kTranslate_Mask == matrix.getType());
REPORTER_ASSERT(reporter, matrix.rectStaysRect());
dst.fRight += SK_Scalar1;
matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
REPORTER_ASSERT(reporter,
(SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask) == matrix.getType());
REPORTER_ASSERT(reporter, matrix.rectStaysRect());
dst = src;
dst.fRight = src.fRight * 2;
matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
REPORTER_ASSERT(reporter, SkMatrix::kScale_Mask == matrix.getType());
REPORTER_ASSERT(reporter, matrix.rectStaysRect());
}
void SkDeferredCanvas::Rec::setConcat(const SkMatrix& m) {
SkASSERT(m.getType() <= (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask));
if (m.getType() <= SkMatrix::kTranslate_Mask) {
fType = kTrans_Type;
fData.fTranslate.set(m.getTranslateX(), m.getTranslateY());
} else {
fType = kScaleTrans_Type;
fData.fScaleTrans.fScale.set(m.getScaleX(), m.getScaleY());
fData.fScaleTrans.fTrans.set(m.getTranslateX(), m.getTranslateY());
}
}
/**
* For the purposes of drawing bitmaps, if a matrix is "almost" translate
* go ahead and treat it as if it were, so that subsequent code can go fast.
*/
static bool just_trans_clamp(const SkMatrix& matrix, const SkBitmap& bitmap) {
SkASSERT(matrix_only_scale_translate(matrix));
if (matrix.getType() & SkMatrix::kScale_Mask) {
SkRect src, dst;
bitmap.getBounds(&src);
// Can't call mapRect(), since that will fix up inverted rectangles,
// e.g. when scale is negative, and we don't want to return true for
// those.
matrix.mapPoints(SkTCast<SkPoint*>(&dst),
SkTCast<const SkPoint*>(&src),
2);
// Now round all 4 edges to device space, and then compare the device
// width/height to the original. Note: we must map all 4 and subtract
// rather than map the "width" and compare, since we care about the
// phase (in pixel space) that any translate in the matrix might impart.
SkIRect idst;
dst.round(&idst);
return idst.width() == bitmap.width() && idst.height() == bitmap.height();
}
// if we got here, we're either kTranslate_Mask or identity
return true;
}
/**
* Determine if the matrix can be treated as integral-only-translate,
* for the purpose of filtering.
*/
static bool just_trans_integral(const SkMatrix& m) {
static constexpr SkScalar tol = SK_Scalar1 / 256;
return m.getType() <= SkMatrix::kTranslate_Mask
&& SkScalarNearlyEqual(m.getTranslateX(), SkScalarRoundToScalar(m.getTranslateX()), tol)
&& SkScalarNearlyEqual(m.getTranslateY(), SkScalarRoundToScalar(m.getTranslateY()), tol);
}
void Matrix4::load(const SkMatrix& v) {
memset(data, 0, sizeof(data));
data[kScaleX] = v[SkMatrix::kMScaleX];
data[kSkewX] = v[SkMatrix::kMSkewX];
data[kTranslateX] = v[SkMatrix::kMTransX];
data[kSkewY] = v[SkMatrix::kMSkewY];
data[kScaleY] = v[SkMatrix::kMScaleY];
data[kTranslateY] = v[SkMatrix::kMTransY];
data[kPerspective0] = v[SkMatrix::kMPersp0];
data[kPerspective1] = v[SkMatrix::kMPersp1];
data[kPerspective2] = v[SkMatrix::kMPersp2];
data[kScaleZ] = 1.0f;
// NOTE: The flags are compatible between SkMatrix and this class.
// However, SkMatrix::getType() does not return the flag
// kRectStaysRect. The return value is masked with 0xF
// so we need the extra rectStaysRect() check
mType = v.getType();
if (v.rectStaysRect()) {
mType |= kTypeRectToRect;
}
}
bool shouldDrawAntiAliased(const GraphicsContext* context, const SkRect& destRect)
{
if (!context->shouldAntialias())
return false;
const SkMatrix totalMatrix = context->getTotalMatrix();
// Don't disable anti-aliasing if we're rotated or skewed.
if (!totalMatrix.rectStaysRect())
return true;
// Disable anti-aliasing for scales or n*90 degree rotations.
// Allow to opt out of the optimization though for "hairline" geometry
// images - using the shouldAntialiasHairlineImages() GraphicsContext flag.
if (!context->shouldAntialiasHairlineImages())
return false;
// Check if the dimensions of the destination are "small" (less than one
// device pixel). To prevent sudden drop-outs. Since we know that
// kRectStaysRect_Mask is set, the matrix either has scale and no skew or
// vice versa. We can query the kAffine_Mask flag to determine which case
// it is.
// FIXME: This queries the CTM while drawing, which is generally
// discouraged. Always drawing with AA can negatively impact performance
// though - that's why it's not always on.
SkScalar widthExpansion, heightExpansion;
if (totalMatrix.getType() & SkMatrix::kAffine_Mask)
widthExpansion = totalMatrix[SkMatrix::kMSkewY], heightExpansion = totalMatrix[SkMatrix::kMSkewX];
else
widthExpansion = totalMatrix[SkMatrix::kMScaleX], heightExpansion = totalMatrix[SkMatrix::kMScaleY];
return destRect.width() * fabs(widthExpansion) < 1 || destRect.height() * fabs(heightExpansion) < 1;
}
template <typename T> void write_sparse_matrix(T* writer, const SkMatrix& matrix) {
SkMatrix::TypeMask tm = matrix.getType();
SkScalar tmp[9];
if (tm & SkMatrix::kPerspective_Mask) {
matrix.get9(tmp);
writer->write(tmp, 9 * sizeof(SkScalar));
} else if (tm & SkMatrix::kAffine_Mask) {
tmp[0] = matrix[SkMatrix::kMScaleX];
tmp[1] = matrix[SkMatrix::kMSkewX];
tmp[2] = matrix[SkMatrix::kMTransX];
tmp[3] = matrix[SkMatrix::kMScaleY];
tmp[4] = matrix[SkMatrix::kMSkewY];
tmp[5] = matrix[SkMatrix::kMTransY];
writer->write(tmp, 6 * sizeof(SkScalar));
} else if (tm & SkMatrix::kScale_Mask) {
tmp[0] = matrix[SkMatrix::kMScaleX];
tmp[1] = matrix[SkMatrix::kMTransX];
tmp[2] = matrix[SkMatrix::kMScaleY];
tmp[3] = matrix[SkMatrix::kMTransY];
writer->write(tmp, 4 * sizeof(SkScalar));
} else if (tm & SkMatrix::kTranslate_Mask) {
tmp[0] = matrix[SkMatrix::kMTransX];
tmp[1] = matrix[SkMatrix::kMTransY];
writer->write(tmp, 2 * sizeof(SkScalar));
}
// else write nothing for Identity
}
static inline bool CanApplyDstMatrixAsCTM(const SkMatrix& m, const SkPaint& paint) {
if (!paint.getMaskFilter()) {
return true;
}
// Some mask filters parameters (sigma) depend on the CTM/scale.
return m.getType() <= SkMatrix::kTranslate_Mask;
}
void SkPictureRecord::recordScale(const SkMatrix& m) {
SkASSERT(SkMatrix::kScale_Mask == m.getType());
// op + sx + sy
size_t size = 1 * kUInt32Size + 2 * sizeof(SkScalar);
size_t initialOffset = this->addDraw(SCALE, &size);
this->addScalar(m.getScaleX());
this->addScalar(m.getScaleY());
this->validate(initialOffset, size);
}
void SkPictureRecord::recordTranslate(const SkMatrix& m) {
SkASSERT(SkMatrix::kTranslate_Mask == m.getType());
// op + dx + dy
size_t size = 1 * kUInt32Size + 2 * sizeof(SkScalar);
size_t initialOffset = this->addDraw(TRANSLATE, &size);
this->addScalar(m.getTranslateX());
this->addScalar(m.getTranslateY());
this->validate(initialOffset, size);
}
SkShader::MatrixClass SkShader::ComputeMatrixClass(const SkMatrix& mat) {
MatrixClass mc = kLinear_MatrixClass;
if (mat.getType() & SkMatrix::kPerspective_Mask) {
if (mat.fixedStepInX(0, NULL, NULL)) {
mc = kFixedStepInX_MatrixClass;
} else {
mc = kPerspective_MatrixClass;
}
}
return mc;
}
static void do_concat(SkWStream* stream, const SkMatrix& matrix, bool isSetMatrix) {
unsigned mtype = matrix.getType();
SkASSERT(0 == (mtype & ~kTypeMask_ConcatMask));
unsigned extra = mtype;
if (isSetMatrix) {
extra |= kSetMatrix_ConcatMask;
}
if (mtype || isSetMatrix) {
stream->write32(pack_verb(SkPipeVerb::kConcat, extra));
write_sparse_matrix(stream, matrix);
}
}
sk_sp<SkImageFilter> SkLocalMatrixImageFilter::Make(const SkMatrix& localM,
sk_sp<SkImageFilter> input) {
if (!input) {
return nullptr;
}
if (localM.getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) {
return nullptr;
}
if (localM.isIdentity()) {
return input;
}
return sk_sp<SkImageFilter>(new SkLocalMatrixImageFilter(localM, input));
}
void SkPictureRecord::didConcat(const SkMatrix& matrix) {
switch (matrix.getType()) {
case SkMatrix::kTranslate_Mask:
this->recordTranslate(matrix);
break;
case SkMatrix::kScale_Mask:
this->recordScale(matrix);
break;
default:
this->recordConcat(matrix);
break;
}
this->INHERITED::didConcat(matrix);
}
static bool just_trans_general(const SkMatrix& matrix) {
SkASSERT(matrix_only_scale_translate(matrix));
if (matrix.getType() & SkMatrix::kScale_Mask) {
const SkScalar tol = SK_Scalar1 / 32768;
if (!SkScalarNearlyZero(matrix[SkMatrix::kMScaleX] - SK_Scalar1, tol)) {
return false;
}
if (!SkScalarNearlyZero(matrix[SkMatrix::kMScaleY] - SK_Scalar1, tol)) {
return false;
}
}
// if we got here, treat us as either kTranslate_Mask or identity
return true;
}
/**
* For the purposes of drawing bitmaps, if a matrix is "almost" translate
* go ahead and treat it as if it were, so that subsequent code can go fast.
*/
static bool just_trans_clamp(const SkMatrix& matrix, const SkBitmap& bitmap) {
SkMatrix::TypeMask mask = matrix.getType();
if (mask & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) {
return false;
}
if (mask & SkMatrix::kScale_Mask) {
SkScalar sx = matrix[SkMatrix::kMScaleX];
SkScalar sy = matrix[SkMatrix::kMScaleY];
int w = bitmap.width();
int h = bitmap.height();
int sw = SkScalarRound(SkScalarMul(sx, SkIntToScalar(w)));
int sh = SkScalarRound(SkScalarMul(sy, SkIntToScalar(h)));
return sw == w && sh == h;
}
// if we got here, we're either kTranslate_Mask or identity
return true;
}
void SkGPipeCanvas::didConcat(const SkMatrix& matrix) {
if (!matrix.isIdentity()) {
NOTIFY_SETUP(this);
switch (matrix.getType()) {
case SkMatrix::kTranslate_Mask:
this->recordTranslate(matrix);
break;
case SkMatrix::kScale_Mask:
this->recordScale(matrix);
break;
default:
this->recordConcat(matrix);
break;
}
}
this->INHERITED::didConcat(matrix);
}
void SkJSONCanvas::didConcat(const SkMatrix& matrix) {
Json::Value command(Json::objectValue);
switch (matrix.getType()) {
case SkMatrix::kTranslate_Mask:
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_TRANSLATE);
command[SKJSONCANVAS_ATTRIBUTE_X] = Json::Value(matrix.get(SkMatrix::kMTransX));
command[SKJSONCANVAS_ATTRIBUTE_Y] = Json::Value(matrix.get(SkMatrix::kMTransY));
break;
case SkMatrix::kScale_Mask:
command[SKJSONCANVAS_COMMAND] = Json::Value(SKJSONCANVAS_COMMAND_SCALE);
command[SKJSONCANVAS_ATTRIBUTE_X] = Json::Value(matrix.get(SkMatrix::kMScaleX));
command[SKJSONCANVAS_ATTRIBUTE_Y] = Json::Value(matrix.get(SkMatrix::kMScaleY));
break;
default:
this->didSetMatrix(this->getTotalMatrix());
return;
}
fCommands.append(command);
}
static bool just_trans_general(const SkMatrix& matrix) {
SkMatrix::TypeMask mask = matrix.getType();
if (mask & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) {
return false;
}
if (mask & SkMatrix::kScale_Mask) {
const SkScalar tol = SK_Scalar1 / 32768;
if (!SkScalarNearlyZero(matrix[SkMatrix::kMScaleX] - SK_Scalar1, tol)) {
return false;
}
if (!SkScalarNearlyZero(matrix[SkMatrix::kMScaleY] - SK_Scalar1, tol)) {
return false;
}
}
// if we got here, treat us as either kTranslate_Mask or identity
return true;
}
bool SkDeferredCanvas::push_concat(const SkMatrix& mat) {
if (mat.getType() > (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)) {
return false;
}
// At the moment, we don't know which ops can scale and which can also flip, so
// we reject negative scales for now
if (mat.getScaleX() < 0 || mat.getScaleY() < 0) {
return false;
}
int index = fRecs.count() - 1;
SkMatrix m;
if (index >= 0 && fRecs[index].isConcat(&m)) {
m.preConcat(mat);
fRecs[index].setConcat(m);
} else {
fRecs.append()->setConcat(mat);
}
return true;
}
void SkDumpCanvas::didConcat(const SkMatrix& matrix) {
SkString str;
switch (matrix.getType()) {
case SkMatrix::kTranslate_Mask:
this->dump(kMatrix_Verb, nullptr, "translate(%g %g)",
SkScalarToFloat(matrix.getTranslateX()),
SkScalarToFloat(matrix.getTranslateY()));
break;
case SkMatrix::kScale_Mask:
this->dump(kMatrix_Verb, nullptr, "scale(%g %g)",
SkScalarToFloat(matrix.getScaleX()),
SkScalarToFloat(matrix.getScaleY()));
break;
default:
matrix.toString(&str);
this->dump(kMatrix_Verb, nullptr, "concat(%s)", str.c_str());
break;
}
this->INHERITED::didConcat(matrix);
}
bool SkBitmapProcState::chooseProcs(const SkMatrix& inv, const SkPaint& paint) {
if (fOrigBitmap.width() == 0 || fOrigBitmap.height() == 0) {
return false;
}
const SkMatrix* m;
bool trivial_matrix = (inv.getType() & ~SkMatrix::kTranslate_Mask) == 0;
bool clamp_clamp = SkShader::kClamp_TileMode == fTileModeX &&
SkShader::kClamp_TileMode == fTileModeY;
if (clamp_clamp || trivial_matrix) {
m = &inv;
} else {
fUnitInvMatrix = inv;
fUnitInvMatrix.postIDiv(fOrigBitmap.width(), fOrigBitmap.height());
m = &fUnitInvMatrix;
}
fBitmap = &fOrigBitmap;
if (fOrigBitmap.hasMipMap()) {
int shift = fOrigBitmap.extractMipLevel(&fMipBitmap,
SkScalarToFixed(m->getScaleX()),
SkScalarToFixed(m->getSkewY()));
if (shift > 0) {
if (m != &fUnitInvMatrix) {
fUnitInvMatrix = *m;
m = &fUnitInvMatrix;
}
SkScalar scale = SkFixedToScalar(SK_Fixed1 >> shift);
fUnitInvMatrix.postScale(scale, scale);
// now point here instead of fOrigBitmap
fBitmap = &fMipBitmap;
}
}
void LoggingCanvas::didConcat(const SkMatrix& matrix)
{
AutoLogger logger(this);
RefPtr<JSONObject> params;
switch (matrix.getType()) {
case SkMatrix::kTranslate_Mask:
params = logger.logItemWithParams("translate");
params->setNumber("dx", matrix.getTranslateX());
params->setNumber("dy", matrix.getTranslateY());
break;
case SkMatrix::kScale_Mask:
params = logger.logItemWithParams("scale");
params->setNumber("scaleX", matrix.getScaleX());
params->setNumber("scaleY", matrix.getScaleY());
break;
default:
params = logger.logItemWithParams("concat");
params->setArray("matrix", arrayForSkMatrix(matrix));
}
this->SkCanvas::didConcat(matrix);
}
static ResamplingMode computeResamplingMode(const SkMatrix& matrix, const NativeImageSkia& bitmap, float srcWidth, float srcHeight, float destWidth, float destHeight)
{
// The percent change below which we will not resample. This usually means
// an off-by-one error on the web page, and just doing nearest neighbor
// sampling is usually good enough.
const float kFractionalChangeThreshold = 0.025f;
// Images smaller than this in either direction are considered "small" and
// are not resampled ever (see below).
const int kSmallImageSizeThreshold = 8;
// The amount an image can be stretched in a single direction before we
// say that it is being stretched so much that it must be a line or
// background that doesn't need resampling.
const float kLargeStretch = 3.0f;
// Figure out if we should resample this image. We try to prune out some
// common cases where resampling won't give us anything, since it is much
// slower than drawing stretched.
float diffWidth = fabs(destWidth - srcWidth);
float diffHeight = fabs(destHeight - srcHeight);
bool widthNearlyEqual = diffWidth < std::numeric_limits<float>::epsilon();
bool heightNearlyEqual = diffHeight < std::numeric_limits<float>::epsilon();
// We don't need to resample if the source and destination are the same.
if (widthNearlyEqual && heightNearlyEqual)
return RESAMPLE_NONE;
if (srcWidth <= kSmallImageSizeThreshold
|| srcHeight <= kSmallImageSizeThreshold
|| destWidth <= kSmallImageSizeThreshold
|| destHeight <= kSmallImageSizeThreshold) {
// Never resample small images. These are often used for borders and
// rules (think 1x1 images used to make lines).
return RESAMPLE_NONE;
}
if (srcHeight * kLargeStretch <= destHeight || srcWidth * kLargeStretch <= destWidth) {
// Large image detected.
// Don't resample if it is being stretched a lot in only one direction.
// This is trying to catch cases where somebody has created a border
// (which might be large) and then is stretching it to fill some part
// of the page.
if (widthNearlyEqual || heightNearlyEqual)
return RESAMPLE_NONE;
// The image is growing a lot and in more than one direction. Resampling
// is slow and doesn't give us very much when growing a lot.
return RESAMPLE_LINEAR;
}
if ((diffWidth / srcWidth < kFractionalChangeThreshold)
&& (diffHeight / srcHeight < kFractionalChangeThreshold)) {
// It is disappointingly common on the web for image sizes to be off by
// one or two pixels. We don't bother resampling if the size difference
// is a small fraction of the original size.
return RESAMPLE_NONE;
}
// When the image is not yet done loading, use linear. We don't cache the
// partially resampled images, and as they come in incrementally, it causes
// us to have to resample the whole thing every time.
if (!bitmap.isDataComplete())
return RESAMPLE_LINEAR;
// Everything else gets resampled.
// High quality interpolation only enabled for scaling and translation.
if (!(matrix.getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)))
return RESAMPLE_AWESOME;
return RESAMPLE_LINEAR;
}
void NativeImageSkia::draw(GraphicsContext* context, const SkRect& srcRect, const SkRect& destRect, PassRefPtr<SkXfermode> compOp) const
{
TRACE_EVENT0("skia", "NativeImageSkia::draw");
SkPaint paint;
paint.setXfermode(compOp.get());
paint.setColorFilter(context->colorFilter());
paint.setAlpha(context->getNormalizedAlpha());
paint.setLooper(context->drawLooper());
// only antialias if we're rotated or skewed
paint.setAntiAlias(hasNon90rotation(context));
ResamplingMode resampling;
if (context->isAccelerated()) {
resampling = LinearResampling;
} else if (context->printing()) {
resampling = NoResampling;
} else {
// Take into account scale applied to the canvas when computing sampling mode (e.g. CSS scale or page scale).
SkRect destRectTarget = destRect;
SkMatrix totalMatrix = context->getTotalMatrix();
if (!(totalMatrix.getType() & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)))
totalMatrix.mapRect(&destRectTarget, destRect);
resampling = computeResamplingMode(totalMatrix,
SkScalarToFloat(srcRect.width()), SkScalarToFloat(srcRect.height()),
SkScalarToFloat(destRectTarget.width()), SkScalarToFloat(destRectTarget.height()));
}
if (resampling == NoResampling) {
// FIXME: This is to not break tests (it results in the filter bitmap flag
// being set to true). We need to decide if we respect NoResampling
// being returned from computeResamplingMode.
resampling = LinearResampling;
}
resampling = limitResamplingMode(context, resampling);
paint.setFilterBitmap(resampling == LinearResampling);
bool isLazyDecoded = DeferredImageDecoder::isLazyDecoded(bitmap());
// FIXME: Bicubic filtering in Skia is only applied to defer-decoded images
// as an experiment. Once this filtering code path becomes stable we should
// turn this on for all cases, including non-defer-decoded images.
bool useBicubicFilter = resampling == AwesomeResampling && isLazyDecoded;
if (useBicubicFilter)
paint.setFilterLevel(SkPaint::kHigh_FilterLevel);
if (resampling == AwesomeResampling && !useBicubicFilter) {
// Resample the image and then draw the result to canvas with bilinear
// filtering.
drawResampledBitmap(context, paint, srcRect, destRect);
} else {
// We want to filter it if we decided to do interpolation above, or if
// there is something interesting going on with the matrix (like a rotation).
// Note: for serialization, we will want to subset the bitmap first so we
// don't send extra pixels.
context->drawBitmapRect(bitmap(), &srcRect, destRect, &paint);
}
if (isLazyDecoded)
PlatformInstrumentation::didDrawLazyPixelRef(bitmap().getGenerationID());
context->didDrawRect(destRect, paint, &bitmap());
}
void GrGLGeometryProcessor::emitTransforms(GrGLGPBuilder* pb,
const GrShaderVar& posVar,
const char* localCoords,
const SkMatrix& localMatrix,
const TransformsIn& tin,
TransformsOut* tout) {
GrGLVertexBuilder* vb = pb->getVertexShaderBuilder();
tout->push_back_n(tin.count());
fInstalledTransforms.push_back_n(tin.count());
for (int i = 0; i < tin.count(); i++) {
const ProcCoords& coordTransforms = tin[i];
fInstalledTransforms[i].push_back_n(coordTransforms.count());
for (int t = 0; t < coordTransforms.count(); t++) {
SkString strUniName("StageMatrix");
strUniName.appendf("_%i_%i", i, t);
GrSLType varyingType;
GrCoordSet coordType = coordTransforms[t]->sourceCoords();
uint32_t type = coordTransforms[t]->getMatrix().getType();
if (kLocal_GrCoordSet == coordType) {
type |= localMatrix.getType();
}
varyingType = SkToBool(SkMatrix::kPerspective_Mask & type) ? kVec3f_GrSLType :
kVec2f_GrSLType;
GrSLPrecision precision = coordTransforms[t]->precision();
const char* uniName;
fInstalledTransforms[i][t].fHandle =
pb->addUniform(GrGLProgramBuilder::kVertex_Visibility,
kMat33f_GrSLType, precision,
strUniName.c_str(),
&uniName).toShaderBuilderIndex();
SkString strVaryingName("MatrixCoord");
strVaryingName.appendf("_%i_%i", i, t);
GrGLVertToFrag v(varyingType);
pb->addVarying(strVaryingName.c_str(), &v, precision);
SkASSERT(kVec2f_GrSLType == varyingType || kVec3f_GrSLType == varyingType);
SkNEW_APPEND_TO_TARRAY(&(*tout)[i], GrGLProcessor::TransformedCoords,
(SkString(v.fsIn()), varyingType));
// varying = matrix * coords (logically)
if (kDevice_GrCoordSet == coordType) {
if (kVec2f_GrSLType == varyingType) {
if (kVec2f_GrSLType == posVar.getType()) {
vb->codeAppendf("%s = (%s * vec3(%s, 1)).xy;",
v.vsOut(), uniName, posVar.c_str());
} else {
// The brackets here are just to scope the temp variable
vb->codeAppendf("{ vec3 temp = %s * %s;", uniName, posVar.c_str());
vb->codeAppendf("%s = vec2(temp.x/temp.z, temp.y/temp.z); }", v.vsOut());
}
} else {
if (kVec2f_GrSLType == posVar.getType()) {
vb->codeAppendf("%s = %s * vec3(%s, 1);",
v.vsOut(), uniName, posVar.c_str());
} else {
vb->codeAppendf("%s = %s * %s;", v.vsOut(), uniName, posVar.c_str());
}
}
} else {
if (kVec2f_GrSLType == varyingType) {
vb->codeAppendf("%s = (%s * vec3(%s, 1)).xy;", v.vsOut(), uniName, localCoords);
} else {
vb->codeAppendf("%s = %s * vec3(%s, 1);", v.vsOut(), uniName, localCoords);
}
}
}
}
}
// true iff the matrix has a scale and no more than an optional translate.
static bool matrix_only_scale_translate(const SkMatrix& m) {
return (m.getType() & ~SkMatrix::kTranslate_Mask) == SkMatrix::kScale_Mask;
}
static bool only_scale_and_translate(const SkMatrix& matrix) {
unsigned mask = SkMatrix::kTranslate_Mask | SkMatrix::kScale_Mask;
return (matrix.getType() & ~mask) == 0;
}
// true iff the matrix contains, at most, scale and translate elements
static bool matrix_only_scale_translate(const SkMatrix& m) {
return m.getType() <= (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask);
}