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dl_builder.cc
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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "flutter/display_list/dl_builder.h"
#include "flutter/display_list/display_list.h"
#include "flutter/display_list/dl_blend_mode.h"
#include "flutter/display_list/dl_op_flags.h"
#include "flutter/display_list/dl_op_records.h"
#include "flutter/display_list/effects/dl_color_source.h"
#include "flutter/display_list/utils/dl_bounds_accumulator.h"
#include "fml/logging.h"
#include "third_party/skia/include/core/SkScalar.h"
namespace flutter {
#define DL_BUILDER_PAGE 4096
// CopyV(dst, src,n, src,n, ...) copies any number of typed srcs into dst.
static void CopyV(void* dst) {}
template <typename S, typename... Rest>
static void CopyV(void* dst, const S* src, int n, Rest&&... rest) {
FML_DCHECK(((uintptr_t)dst & (alignof(S) - 1)) == 0)
<< "Expected " << dst << " to be aligned for at least " << alignof(S)
<< " bytes.";
// If n is 0, there is nothing to copy into dst from src.
if (n > 0) {
memcpy(dst, src, n * sizeof(S));
dst = reinterpret_cast<void*>(reinterpret_cast<uint8_t*>(dst) +
n * sizeof(S));
}
// Repeat for the next items, if any
CopyV(dst, std::forward<Rest>(rest)...);
}
static constexpr inline bool is_power_of_two(int value) {
return (value & (value - 1)) == 0;
}
template <typename T, typename... Args>
void* DisplayListBuilder::Push(size_t pod, int render_op_inc, Args&&... args) {
size_t size = SkAlignPtr(sizeof(T) + pod);
FML_DCHECK(size < (1 << 24));
if (used_ + size > allocated_) {
static_assert(is_power_of_two(DL_BUILDER_PAGE),
"This math needs updating for non-pow2.");
// Next greater multiple of DL_BUILDER_PAGE.
allocated_ = (used_ + size + DL_BUILDER_PAGE) & ~(DL_BUILDER_PAGE - 1);
storage_.realloc(allocated_);
FML_DCHECK(storage_.get());
memset(storage_.get() + used_, 0, allocated_ - used_);
}
FML_DCHECK(used_ + size <= allocated_);
auto op = reinterpret_cast<T*>(storage_.get() + used_);
used_ += size;
new (op) T{std::forward<Args>(args)...};
op->type = T::kType;
op->size = size;
render_op_count_ += render_op_inc;
op_index_++;
return op + 1;
}
sk_sp<DisplayList> DisplayListBuilder::Build() {
while (layer_stack_.size() > 1) {
restore();
}
size_t bytes = used_;
int count = render_op_count_;
size_t nested_bytes = nested_bytes_;
int nested_count = nested_op_count_;
bool compatible = current_layer_->is_group_opacity_compatible();
bool is_safe = is_ui_thread_safe_;
bool affects_transparency = current_layer_->affects_transparent_layer();
used_ = allocated_ = render_op_count_ = op_index_ = 0;
nested_bytes_ = nested_op_count_ = 0;
is_ui_thread_safe_ = true;
storage_.realloc(bytes);
layer_stack_.pop_back();
layer_stack_.emplace_back();
tracker_.reset();
current_ = DlPaint();
return sk_sp<DisplayList>(new DisplayList(
std::move(storage_), bytes, count, nested_bytes, nested_count, bounds(),
compatible, is_safe, affects_transparency, rtree()));
}
DisplayListBuilder::DisplayListBuilder(const SkRect& cull_rect,
bool prepare_rtree)
: tracker_(cull_rect, SkMatrix::I()) {
if (prepare_rtree) {
accumulator_ = std::make_unique<RTreeBoundsAccumulator>();
} else {
accumulator_ = std::make_unique<RectBoundsAccumulator>();
}
layer_stack_.emplace_back();
current_layer_ = &layer_stack_.back();
}
DisplayListBuilder::~DisplayListBuilder() {
uint8_t* ptr = storage_.get();
if (ptr) {
DisplayList::DisposeOps(ptr, ptr + used_);
}
}
SkISize DisplayListBuilder::GetBaseLayerSize() const {
return tracker_.base_device_cull_rect().roundOut().size();
}
SkImageInfo DisplayListBuilder::GetImageInfo() const {
SkISize size = GetBaseLayerSize();
return SkImageInfo::MakeUnknown(size.width(), size.height());
}
void DisplayListBuilder::onSetAntiAlias(bool aa) {
current_.setAntiAlias(aa);
Push<SetAntiAliasOp>(0, 0, aa);
}
void DisplayListBuilder::onSetDither(bool dither) {
current_.setDither(dither);
Push<SetDitherOp>(0, 0, dither);
}
void DisplayListBuilder::onSetInvertColors(bool invert) {
current_.setInvertColors(invert);
Push<SetInvertColorsOp>(0, 0, invert);
UpdateCurrentOpacityCompatibility();
}
void DisplayListBuilder::onSetStrokeCap(DlStrokeCap cap) {
current_.setStrokeCap(cap);
Push<SetStrokeCapOp>(0, 0, cap);
}
void DisplayListBuilder::onSetStrokeJoin(DlStrokeJoin join) {
current_.setStrokeJoin(join);
Push<SetStrokeJoinOp>(0, 0, join);
}
void DisplayListBuilder::onSetDrawStyle(DlDrawStyle style) {
current_.setDrawStyle(style);
Push<SetStyleOp>(0, 0, style);
}
void DisplayListBuilder::onSetStrokeWidth(float width) {
current_.setStrokeWidth(width);
Push<SetStrokeWidthOp>(0, 0, width);
}
void DisplayListBuilder::onSetStrokeMiter(float limit) {
current_.setStrokeMiter(limit);
Push<SetStrokeMiterOp>(0, 0, limit);
}
void DisplayListBuilder::onSetColor(DlColor color) {
current_.setColor(color);
Push<SetColorOp>(0, 0, color);
}
void DisplayListBuilder::onSetBlendMode(DlBlendMode mode) {
current_.setBlendMode(mode);
Push<SetBlendModeOp>(0, 0, mode);
UpdateCurrentOpacityCompatibility();
}
void DisplayListBuilder::onSetColorSource(const DlColorSource* source) {
if (source == nullptr) {
current_.setColorSource(nullptr);
Push<ClearColorSourceOp>(0, 0);
} else {
current_.setColorSource(source->shared());
is_ui_thread_safe_ = is_ui_thread_safe_ && source->isUIThreadSafe();
switch (source->type()) {
case DlColorSourceType::kColor: {
const DlColorColorSource* color_source = source->asColor();
current_.setColorSource(nullptr);
setColor(color_source->color());
break;
}
case DlColorSourceType::kImage: {
const DlImageColorSource* image_source = source->asImage();
FML_DCHECK(image_source);
Push<SetImageColorSourceOp>(0, 0, image_source);
break;
}
case DlColorSourceType::kLinearGradient: {
const DlLinearGradientColorSource* linear = source->asLinearGradient();
FML_DCHECK(linear);
void* pod = Push<SetPodColorSourceOp>(linear->size(), 0);
new (pod) DlLinearGradientColorSource(linear);
break;
}
case DlColorSourceType::kRadialGradient: {
const DlRadialGradientColorSource* radial = source->asRadialGradient();
FML_DCHECK(radial);
void* pod = Push<SetPodColorSourceOp>(radial->size(), 0);
new (pod) DlRadialGradientColorSource(radial);
break;
}
case DlColorSourceType::kConicalGradient: {
const DlConicalGradientColorSource* conical =
source->asConicalGradient();
FML_DCHECK(conical);
void* pod = Push<SetPodColorSourceOp>(conical->size(), 0);
new (pod) DlConicalGradientColorSource(conical);
break;
}
case DlColorSourceType::kSweepGradient: {
const DlSweepGradientColorSource* sweep = source->asSweepGradient();
FML_DCHECK(sweep);
void* pod = Push<SetPodColorSourceOp>(sweep->size(), 0);
new (pod) DlSweepGradientColorSource(sweep);
break;
}
case DlColorSourceType::kRuntimeEffect: {
const DlRuntimeEffectColorSource* effect = source->asRuntimeEffect();
FML_DCHECK(effect);
Push<SetRuntimeEffectColorSourceOp>(0, 0, effect);
break;
}
#ifdef IMPELLER_ENABLE_3D
case DlColorSourceType::kScene: {
const DlSceneColorSource* scene = source->asScene();
FML_DCHECK(scene);
Push<SetSceneColorSourceOp>(0, 0, scene);
break;
}
#endif // IMPELLER_ENABLE_3D
}
}
}
void DisplayListBuilder::onSetImageFilter(const DlImageFilter* filter) {
if (filter == nullptr) {
current_.setImageFilter(nullptr);
Push<ClearImageFilterOp>(0, 0);
} else {
current_.setImageFilter(filter->shared());
switch (filter->type()) {
case DlImageFilterType::kBlur: {
const DlBlurImageFilter* blur_filter = filter->asBlur();
FML_DCHECK(blur_filter);
void* pod = Push<SetPodImageFilterOp>(blur_filter->size(), 0);
new (pod) DlBlurImageFilter(blur_filter);
break;
}
case DlImageFilterType::kDilate: {
const DlDilateImageFilter* dilate_filter = filter->asDilate();
FML_DCHECK(dilate_filter);
void* pod = Push<SetPodImageFilterOp>(dilate_filter->size(), 0);
new (pod) DlDilateImageFilter(dilate_filter);
break;
}
case DlImageFilterType::kErode: {
const DlErodeImageFilter* erode_filter = filter->asErode();
FML_DCHECK(erode_filter);
void* pod = Push<SetPodImageFilterOp>(erode_filter->size(), 0);
new (pod) DlErodeImageFilter(erode_filter);
break;
}
case DlImageFilterType::kMatrix: {
const DlMatrixImageFilter* matrix_filter = filter->asMatrix();
FML_DCHECK(matrix_filter);
void* pod = Push<SetPodImageFilterOp>(matrix_filter->size(), 0);
new (pod) DlMatrixImageFilter(matrix_filter);
break;
}
case DlImageFilterType::kCompose:
case DlImageFilterType::kLocalMatrix:
case DlImageFilterType::kColorFilter: {
Push<SetSharedImageFilterOp>(0, 0, filter);
break;
}
}
}
}
void DisplayListBuilder::onSetColorFilter(const DlColorFilter* filter) {
if (filter == nullptr) {
current_.setColorFilter(nullptr);
Push<ClearColorFilterOp>(0, 0);
} else {
current_.setColorFilter(filter->shared());
switch (filter->type()) {
case DlColorFilterType::kBlend: {
const DlBlendColorFilter* blend_filter = filter->asBlend();
FML_DCHECK(blend_filter);
void* pod = Push<SetPodColorFilterOp>(blend_filter->size(), 0);
new (pod) DlBlendColorFilter(blend_filter);
break;
}
case DlColorFilterType::kMatrix: {
const DlMatrixColorFilter* matrix_filter = filter->asMatrix();
FML_DCHECK(matrix_filter);
void* pod = Push<SetPodColorFilterOp>(matrix_filter->size(), 0);
new (pod) DlMatrixColorFilter(matrix_filter);
break;
}
case DlColorFilterType::kSrgbToLinearGamma: {
void* pod = Push<SetPodColorFilterOp>(filter->size(), 0);
new (pod) DlSrgbToLinearGammaColorFilter();
break;
}
case DlColorFilterType::kLinearToSrgbGamma: {
void* pod = Push<SetPodColorFilterOp>(filter->size(), 0);
new (pod) DlLinearToSrgbGammaColorFilter();
break;
}
}
}
UpdateCurrentOpacityCompatibility();
}
void DisplayListBuilder::onSetPathEffect(const DlPathEffect* effect) {
if (effect == nullptr) {
current_.setPathEffect(nullptr);
Push<ClearPathEffectOp>(0, 0);
} else {
current_.setPathEffect(effect->shared());
switch (effect->type()) {
case DlPathEffectType::kDash: {
const DlDashPathEffect* dash_effect = effect->asDash();
void* pod = Push<SetPodPathEffectOp>(dash_effect->size(), 0);
new (pod) DlDashPathEffect(dash_effect);
break;
}
}
}
}
void DisplayListBuilder::onSetMaskFilter(const DlMaskFilter* filter) {
if (filter == nullptr) {
current_.setMaskFilter(nullptr);
Push<ClearMaskFilterOp>(0, 0);
} else {
current_.setMaskFilter(filter->shared());
switch (filter->type()) {
case DlMaskFilterType::kBlur: {
const DlBlurMaskFilter* blur_filter = filter->asBlur();
FML_DCHECK(blur_filter);
void* pod = Push<SetPodMaskFilterOp>(blur_filter->size(), 0);
new (pod) DlBlurMaskFilter(blur_filter);
break;
}
}
}
}
void DisplayListBuilder::SetAttributesFromPaint(
const DlPaint& paint,
const DisplayListAttributeFlags flags) {
if (flags.applies_anti_alias()) {
setAntiAlias(paint.isAntiAlias());
}
if (flags.applies_dither()) {
setDither(paint.isDither());
}
if (flags.applies_alpha_or_color()) {
setColor(paint.getColor().argb);
}
if (flags.applies_blend()) {
setBlendMode(paint.getBlendMode());
}
if (flags.applies_style()) {
setDrawStyle(paint.getDrawStyle());
}
if (flags.is_stroked(paint.getDrawStyle())) {
setStrokeWidth(paint.getStrokeWidth());
setStrokeMiter(paint.getStrokeMiter());
setStrokeCap(paint.getStrokeCap());
setStrokeJoin(paint.getStrokeJoin());
}
if (flags.applies_shader()) {
setColorSource(paint.getColorSource().get());
}
if (flags.applies_color_filter()) {
setInvertColors(paint.isInvertColors());
setColorFilter(paint.getColorFilter().get());
}
if (flags.applies_image_filter()) {
setImageFilter(paint.getImageFilter().get());
}
if (flags.applies_path_effect()) {
setPathEffect(paint.getPathEffect().get());
}
if (flags.applies_mask_filter()) {
setMaskFilter(paint.getMaskFilter().get());
}
}
void DisplayListBuilder::checkForDeferredSave() {
if (current_layer_->has_deferred_save_op_) {
size_t save_offset_ = used_;
Push<SaveOp>(0, 1);
current_layer_->save_offset_ = save_offset_;
current_layer_->has_deferred_save_op_ = false;
}
}
void DisplayListBuilder::Save() {
bool is_nop = current_layer_->is_nop_;
layer_stack_.emplace_back();
current_layer_ = &layer_stack_.back();
current_layer_->has_deferred_save_op_ = true;
current_layer_->is_nop_ = is_nop;
tracker_.save();
accumulator()->save();
}
void DisplayListBuilder::Restore() {
if (layer_stack_.size() > 1) {
SaveOpBase* op = reinterpret_cast<SaveOpBase*>(
storage_.get() + current_layer_->save_offset());
if (!current_layer_->has_deferred_save_op_) {
op->restore_index = op_index_;
Push<RestoreOp>(0, 1);
}
// Grab the current layer info before we push the restore
// on the stack.
LayerInfo layer_info = layer_stack_.back();
tracker_.restore();
layer_stack_.pop_back();
current_layer_ = &layer_stack_.back();
bool is_unbounded = layer_info.is_unbounded();
// Before we pop_back we will get the current layer bounds from the
// current accumulator and adjust it as required based on the filter.
std::shared_ptr<const DlImageFilter> filter = layer_info.filter();
if (filter) {
const SkRect clip = tracker_.device_cull_rect();
if (!accumulator()->restore(
[filter = filter, matrix = GetTransform()](const SkRect& input,
SkRect& output) {
SkIRect output_bounds;
bool ret = filter->map_device_bounds(input.roundOut(), matrix,
output_bounds);
output.set(output_bounds);
return ret;
},
&clip)) {
is_unbounded = true;
}
} else {
accumulator()->restore();
}
if (is_unbounded) {
AccumulateUnbounded();
}
if (layer_info.has_layer()) {
// Layers are never deferred for now, we need to update the
// following code if we ever do saveLayer culling...
FML_DCHECK(!layer_info.has_deferred_save_op_);
if (layer_info.is_group_opacity_compatible()) {
// We are now going to go back and modify the matching saveLayer
// call to add the option indicating it can distribute an opacity
// value to its children.
//
// Note that this operation cannot and does not change the size
// or structure of the SaveLayerOp record. It only sets an option
// flag on an existing field.
//
// Note that these kinds of modification operations on data already
// in the DisplayList are only allowed *during* the build phase.
// Once built, the DisplayList records must remain read only to
// ensure consistency of rendering and |Equals()| behavior.
op->options = op->options.with_can_distribute_opacity();
}
} else {
// For regular save() ops there was no protecting layer so we have to
// accumulate the values into the enclosing layer.
if (layer_info.cannot_inherit_opacity()) {
current_layer_->mark_incompatible();
} else if (layer_info.has_compatible_op()) {
current_layer_->add_compatible_op();
}
}
}
}
void DisplayListBuilder::RestoreToCount(int restore_count) {
FML_DCHECK(restore_count <= GetSaveCount());
while (restore_count < GetSaveCount() && GetSaveCount() > 1) {
restore();
}
}
void DisplayListBuilder::saveLayer(const SkRect* bounds,
const SaveLayerOptions in_options,
const DlImageFilter* backdrop) {
SaveLayerOptions options = in_options.without_optimizations();
DisplayListAttributeFlags flags = options.renders_with_attributes()
? kSaveLayerWithPaintFlags
: kSaveLayerFlags;
OpResult result = PaintResult(current_, flags);
if (result == OpResult::kNoEffect) {
save();
current_layer_->is_nop_ = true;
return;
}
size_t save_layer_offset = used_;
if (options.renders_with_attributes()) {
// The actual flood of the outer layer clip will occur after the
// (eventual) corresponding restore is called, but rather than
// remember this information in the LayerInfo until the restore
// method is processed, we just mark the unbounded state up front.
// Another reason to accumulate the clip here rather than in
// restore is so that this savelayer will be tagged in the rtree
// with its full bounds and the right op_index so that it doesn't
// get culled during rendering.
if (!paint_nops_on_transparency()) {
// We will fill the clip of the outer layer when we restore.
// Accumulate should always return true here because if the
// clip was empty then that would have been caught up above
// when we tested the PaintResult.
[[maybe_unused]] bool unclipped = AccumulateUnbounded();
FML_DCHECK(unclipped);
}
CheckLayerOpacityCompatibility(true);
layer_stack_.emplace_back(save_layer_offset, true,
current_.getImageFilter());
} else {
CheckLayerOpacityCompatibility(false);
layer_stack_.emplace_back(save_layer_offset, true, nullptr);
}
current_layer_ = &layer_stack_.back();
tracker_.save();
accumulator()->save();
if (backdrop) {
// A backdrop will affect up to the entire surface, bounded by the clip
// Accumulate should always return true here because if the
// clip was empty then that would have been caught up above
// when we tested the PaintResult.
[[maybe_unused]] bool unclipped = AccumulateUnbounded();
FML_DCHECK(unclipped);
bounds //
? Push<SaveLayerBackdropBoundsOp>(0, 1, options, *bounds, backdrop)
: Push<SaveLayerBackdropOp>(0, 1, options, backdrop);
} else {
bounds //
? Push<SaveLayerBoundsOp>(0, 1, options, *bounds)
: Push<SaveLayerOp>(0, 1, options);
}
if (options.renders_with_attributes()) {
// |current_opacity_compatibility_| does not take an ImageFilter into
// account because an individual primitive with an ImageFilter can apply
// opacity on top of it. But, if the layer is applying the ImageFilter
// then it cannot pass the opacity on.
if (!current_opacity_compatibility_ ||
current_.getImageFilter() != nullptr) {
UpdateLayerOpacityCompatibility(false);
}
}
UpdateLayerResult(result);
if (options.renders_with_attributes() && current_.getImageFilter()) {
// We use |resetCullRect| here because we will be accumulating bounds of
// primitives before applying the filter to those bounds. We might
// encounter a primitive whose bounds are clipped, but whose filtered
// bounds will not be clipped. If the individual rendering ops bounds
// are clipped, it will not contribute to the overall bounds which
// could lead to inaccurate (subset) bounds of the DisplayList.
// We need to reset the cull rect here to avoid this premature clipping.
// The filtered bounds will be clipped to the existing clip rect when
// this layer is restored.
// If bounds is null then the original cull_rect will be used.
tracker_.resetCullRect(bounds);
} else if (bounds) {
// Even though Skia claims that the bounds are only a hint, they actually
// use them as the temporary layer bounds during rendering the layer, so
// we set them as if a clip operation were performed.
tracker_.clipRect(*bounds, ClipOp::kIntersect, false);
}
}
void DisplayListBuilder::SaveLayer(const SkRect* bounds,
const DlPaint* paint,
const DlImageFilter* backdrop) {
if (paint != nullptr) {
SetAttributesFromPaint(*paint,
DisplayListOpFlags::kSaveLayerWithPaintFlags);
saveLayer(bounds, SaveLayerOptions::kWithAttributes, backdrop);
} else {
saveLayer(bounds, SaveLayerOptions::kNoAttributes, backdrop);
}
}
void DisplayListBuilder::Translate(SkScalar tx, SkScalar ty) {
if (SkScalarIsFinite(tx) && SkScalarIsFinite(ty) &&
(tx != 0.0 || ty != 0.0)) {
checkForDeferredSave();
Push<TranslateOp>(0, 1, tx, ty);
tracker_.translate(tx, ty);
}
}
void DisplayListBuilder::Scale(SkScalar sx, SkScalar sy) {
if (SkScalarIsFinite(sx) && SkScalarIsFinite(sy) &&
(sx != 1.0 || sy != 1.0)) {
checkForDeferredSave();
Push<ScaleOp>(0, 1, sx, sy);
tracker_.scale(sx, sy);
}
}
void DisplayListBuilder::Rotate(SkScalar degrees) {
if (SkScalarMod(degrees, 360.0) != 0.0) {
checkForDeferredSave();
Push<RotateOp>(0, 1, degrees);
tracker_.rotate(degrees);
}
}
void DisplayListBuilder::Skew(SkScalar sx, SkScalar sy) {
if (SkScalarIsFinite(sx) && SkScalarIsFinite(sy) &&
(sx != 0.0 || sy != 0.0)) {
checkForDeferredSave();
Push<SkewOp>(0, 1, sx, sy);
tracker_.skew(sx, sy);
}
}
// clang-format off
// 2x3 2D affine subset of a 4x4 transform in row major order
void DisplayListBuilder::Transform2DAffine(
SkScalar mxx, SkScalar mxy, SkScalar mxt,
SkScalar myx, SkScalar myy, SkScalar myt) {
if (SkScalarsAreFinite(mxx, myx) &&
SkScalarsAreFinite(mxy, myy) &&
SkScalarsAreFinite(mxt, myt)) {
if (mxx == 1 && mxy == 0 &&
myx == 0 && myy == 1) {
Translate(mxt, myt);
} else {
checkForDeferredSave();
Push<Transform2DAffineOp>(0, 1,
mxx, mxy, mxt,
myx, myy, myt);
tracker_.transform2DAffine(mxx, mxy, mxt,
myx, myy, myt);
}
}
}
// full 4x4 transform in row major order
void DisplayListBuilder::TransformFullPerspective(
SkScalar mxx, SkScalar mxy, SkScalar mxz, SkScalar mxt,
SkScalar myx, SkScalar myy, SkScalar myz, SkScalar myt,
SkScalar mzx, SkScalar mzy, SkScalar mzz, SkScalar mzt,
SkScalar mwx, SkScalar mwy, SkScalar mwz, SkScalar mwt) {
if ( mxz == 0 &&
myz == 0 &&
mzx == 0 && mzy == 0 && mzz == 1 && mzt == 0 &&
mwx == 0 && mwy == 0 && mwz == 0 && mwt == 1) {
Transform2DAffine(mxx, mxy, mxt,
myx, myy, myt);
} else if (SkScalarsAreFinite(mxx, mxy) && SkScalarsAreFinite(mxz, mxt) &&
SkScalarsAreFinite(myx, myy) && SkScalarsAreFinite(myz, myt) &&
SkScalarsAreFinite(mzx, mzy) && SkScalarsAreFinite(mzz, mzt) &&
SkScalarsAreFinite(mwx, mwy) && SkScalarsAreFinite(mwz, mwt)) {
checkForDeferredSave();
Push<TransformFullPerspectiveOp>(0, 1,
mxx, mxy, mxz, mxt,
myx, myy, myz, myt,
mzx, mzy, mzz, mzt,
mwx, mwy, mwz, mwt);
tracker_.transformFullPerspective(mxx, mxy, mxz, mxt,
myx, myy, myz, myt,
mzx, mzy, mzz, mzt,
mwx, mwy, mwz, mwt);
}
}
// clang-format on
void DisplayListBuilder::TransformReset() {
checkForDeferredSave();
Push<TransformResetOp>(0, 0);
tracker_.setIdentity();
}
void DisplayListBuilder::Transform(const SkMatrix* matrix) {
if (matrix != nullptr) {
Transform(SkM44(*matrix));
}
}
void DisplayListBuilder::Transform(const SkM44* m44) {
if (m44 != nullptr) {
transformFullPerspective(
m44->rc(0, 0), m44->rc(0, 1), m44->rc(0, 2), m44->rc(0, 3),
m44->rc(1, 0), m44->rc(1, 1), m44->rc(1, 2), m44->rc(1, 3),
m44->rc(2, 0), m44->rc(2, 1), m44->rc(2, 2), m44->rc(2, 3),
m44->rc(3, 0), m44->rc(3, 1), m44->rc(3, 2), m44->rc(3, 3));
}
}
void DisplayListBuilder::ClipRect(const SkRect& rect,
ClipOp clip_op,
bool is_aa) {
if (!rect.isFinite()) {
return;
}
tracker_.clipRect(rect, clip_op, is_aa);
if (current_layer_->is_nop_ || tracker_.is_cull_rect_empty()) {
current_layer_->is_nop_ = true;
return;
}
checkForDeferredSave();
switch (clip_op) {
case ClipOp::kIntersect:
Push<ClipIntersectRectOp>(0, 1, rect, is_aa);
break;
case ClipOp::kDifference:
Push<ClipDifferenceRectOp>(0, 1, rect, is_aa);
break;
}
}
void DisplayListBuilder::ClipRRect(const SkRRect& rrect,
ClipOp clip_op,
bool is_aa) {
if (rrect.isRect()) {
clipRect(rrect.rect(), clip_op, is_aa);
} else {
tracker_.clipRRect(rrect, clip_op, is_aa);
if (current_layer_->is_nop_ || tracker_.is_cull_rect_empty()) {
current_layer_->is_nop_ = true;
return;
}
checkForDeferredSave();
switch (clip_op) {
case ClipOp::kIntersect:
Push<ClipIntersectRRectOp>(0, 1, rrect, is_aa);
break;
case ClipOp::kDifference:
Push<ClipDifferenceRRectOp>(0, 1, rrect, is_aa);
break;
}
}
}
void DisplayListBuilder::ClipPath(const SkPath& path,
ClipOp clip_op,
bool is_aa) {
if (!path.isInverseFillType()) {
SkRect rect;
if (path.isRect(&rect)) {
this->clipRect(rect, clip_op, is_aa);
return;
}
SkRRect rrect;
if (path.isOval(&rect)) {
rrect.setOval(rect);
this->clipRRect(rrect, clip_op, is_aa);
return;
}
if (path.isRRect(&rrect)) {
this->clipRRect(rrect, clip_op, is_aa);
return;
}
}
tracker_.clipPath(path, clip_op, is_aa);
if (current_layer_->is_nop_ || tracker_.is_cull_rect_empty()) {
current_layer_->is_nop_ = true;
return;
}
checkForDeferredSave();
switch (clip_op) {
case ClipOp::kIntersect:
Push<ClipIntersectPathOp>(0, 1, path, is_aa);
break;
case ClipOp::kDifference:
Push<ClipDifferencePathOp>(0, 1, path, is_aa);
break;
}
}
bool DisplayListBuilder::QuickReject(const SkRect& bounds) const {
return tracker_.content_culled(bounds);
}
void DisplayListBuilder::drawPaint() {
OpResult result = PaintResult(current_, kDrawPaintFlags);
if (result != OpResult::kNoEffect && AccumulateUnbounded()) {
Push<DrawPaintOp>(0, 1);
CheckLayerOpacityCompatibility();
UpdateLayerResult(result);
}
}
void DisplayListBuilder::DrawPaint(const DlPaint& paint) {
SetAttributesFromPaint(paint, DisplayListOpFlags::kDrawPaintFlags);
drawPaint();
}
void DisplayListBuilder::DrawColor(DlColor color, DlBlendMode mode) {
OpResult result = PaintResult(DlPaint(color).setBlendMode(mode));
if (result != OpResult::kNoEffect && AccumulateUnbounded()) {
Push<DrawColorOp>(0, 1, color, mode);
CheckLayerOpacityCompatibility(mode);
UpdateLayerResult(result);
}
}
void DisplayListBuilder::drawLine(const SkPoint& p0, const SkPoint& p1) {
SkRect bounds = SkRect::MakeLTRB(p0.fX, p0.fY, p1.fX, p1.fY).makeSorted();
DisplayListAttributeFlags flags =
(bounds.width() > 0.0f && bounds.height() > 0.0f) ? kDrawLineFlags
: kDrawHVLineFlags;
OpResult result = PaintResult(current_, flags);
if (result != OpResult::kNoEffect && AccumulateOpBounds(bounds, flags)) {
Push<DrawLineOp>(0, 1, p0, p1);
CheckLayerOpacityCompatibility();
UpdateLayerResult(result);
}
}
void DisplayListBuilder::DrawLine(const SkPoint& p0,
const SkPoint& p1,
const DlPaint& paint) {
SetAttributesFromPaint(paint, DisplayListOpFlags::kDrawLineFlags);
drawLine(p0, p1);
}
void DisplayListBuilder::drawRect(const SkRect& rect) {
DisplayListAttributeFlags flags = kDrawRectFlags;
OpResult result = PaintResult(current_, flags);
if (result != OpResult::kNoEffect &&
AccumulateOpBounds(rect.makeSorted(), flags)) {
Push<DrawRectOp>(0, 1, rect);
CheckLayerOpacityCompatibility();
UpdateLayerResult(result);
}
}
void DisplayListBuilder::DrawRect(const SkRect& rect, const DlPaint& paint) {
SetAttributesFromPaint(paint, DisplayListOpFlags::kDrawRectFlags);
drawRect(rect);
}
void DisplayListBuilder::drawOval(const SkRect& bounds) {
DisplayListAttributeFlags flags = kDrawOvalFlags;
OpResult result = PaintResult(current_, flags);
if (result != OpResult::kNoEffect &&
AccumulateOpBounds(bounds.makeSorted(), flags)) {
Push<DrawOvalOp>(0, 1, bounds);
CheckLayerOpacityCompatibility();
UpdateLayerResult(result);
}
}
void DisplayListBuilder::DrawOval(const SkRect& bounds, const DlPaint& paint) {
SetAttributesFromPaint(paint, DisplayListOpFlags::kDrawOvalFlags);
drawOval(bounds);
}
void DisplayListBuilder::drawCircle(const SkPoint& center, SkScalar radius) {
DisplayListAttributeFlags flags = kDrawCircleFlags;
OpResult result = PaintResult(current_, flags);
if (result != OpResult::kNoEffect) {
SkRect bounds = SkRect::MakeLTRB(center.fX - radius, center.fY - radius,
center.fX + radius, center.fY + radius);
if (AccumulateOpBounds(bounds, flags)) {
Push<DrawCircleOp>(0, 1, center, radius);
CheckLayerOpacityCompatibility();
UpdateLayerResult(result);
}
}
}
void DisplayListBuilder::DrawCircle(const SkPoint& center,
SkScalar radius,
const DlPaint& paint) {
SetAttributesFromPaint(paint, DisplayListOpFlags::kDrawCircleFlags);
drawCircle(center, radius);
}
void DisplayListBuilder::drawRRect(const SkRRect& rrect) {
if (rrect.isRect()) {
drawRect(rrect.rect());
} else if (rrect.isOval()) {
drawOval(rrect.rect());
} else {
DisplayListAttributeFlags flags = kDrawRRectFlags;
OpResult result = PaintResult(current_, flags);
if (result != OpResult::kNoEffect &&
AccumulateOpBounds(rrect.getBounds(), flags)) {
Push<DrawRRectOp>(0, 1, rrect);
CheckLayerOpacityCompatibility();
UpdateLayerResult(result);
}
}
}
void DisplayListBuilder::DrawRRect(const SkRRect& rrect, const DlPaint& paint) {
SetAttributesFromPaint(paint, DisplayListOpFlags::kDrawRRectFlags);
drawRRect(rrect);
}
void DisplayListBuilder::drawDRRect(const SkRRect& outer,
const SkRRect& inner) {
DisplayListAttributeFlags flags = kDrawDRRectFlags;
OpResult result = PaintResult(current_, flags);
if (result != OpResult::kNoEffect &&
AccumulateOpBounds(outer.getBounds(), flags)) {
Push<DrawDRRectOp>(0, 1, outer, inner);
CheckLayerOpacityCompatibility();
UpdateLayerResult(result);
}
}
void DisplayListBuilder::DrawDRRect(const SkRRect& outer,
const SkRRect& inner,
const DlPaint& paint) {
SetAttributesFromPaint(paint, DisplayListOpFlags::kDrawDRRectFlags);
drawDRRect(outer, inner);
}
void DisplayListBuilder::drawPath(const SkPath& path) {
DisplayListAttributeFlags flags = kDrawPathFlags;
OpResult result = PaintResult(current_, flags);
if (result != OpResult::kNoEffect) {
bool is_visible = path.isInverseFillType()
? AccumulateUnbounded()
: AccumulateOpBounds(path.getBounds(), flags);
if (is_visible) {
Push<DrawPathOp>(0, 1, path);
CheckLayerOpacityHairlineCompatibility();
UpdateLayerResult(result);
}
}
}
void DisplayListBuilder::DrawPath(const SkPath& path, const DlPaint& paint) {
SetAttributesFromPaint(paint, DisplayListOpFlags::kDrawPathFlags);
drawPath(path);
}
void DisplayListBuilder::drawArc(const SkRect& bounds,
SkScalar start,
SkScalar sweep,
bool useCenter) {
DisplayListAttributeFlags flags = //
useCenter //
? kDrawArcWithCenterFlags
: kDrawArcNoCenterFlags;
OpResult result = PaintResult(current_, flags);
// This could be tighter if we compute where the start and end
// angles are and then also consider the quadrants swept and
// the center if specified.
if (result != OpResult::kNoEffect && AccumulateOpBounds(bounds, flags)) {
Push<DrawArcOp>(0, 1, bounds, start, sweep, useCenter);
if (useCenter) {
CheckLayerOpacityHairlineCompatibility();
} else {
CheckLayerOpacityCompatibility();
}
UpdateLayerResult(result);
}
}
void DisplayListBuilder::DrawArc(const SkRect& bounds,
SkScalar start,
SkScalar sweep,
bool useCenter,
const DlPaint& paint) {
SetAttributesFromPaint(
paint, useCenter ? kDrawArcWithCenterFlags : kDrawArcNoCenterFlags);
drawArc(bounds, start, sweep, useCenter);
}
DisplayListAttributeFlags DisplayListBuilder::FlagsForPointMode(
PointMode mode) {
switch (mode) {
case DlCanvas::PointMode::kPoints:
return kDrawPointsAsPointsFlags;
case PointMode::kLines:
return kDrawPointsAsLinesFlags;
case PointMode::kPolygon:
return kDrawPointsAsPolygonFlags;
}
FML_UNREACHABLE();
}
void DisplayListBuilder::drawPoints(PointMode mode,
uint32_t count,
const SkPoint pts[]) {
if (count == 0) {
return;
}
DisplayListAttributeFlags flags = FlagsForPointMode(mode);
OpResult result = PaintResult(current_, flags);
if (result == OpResult::kNoEffect) {
return;
}
FML_DCHECK(count < DlOpReceiver::kMaxDrawPointsCount);
int bytes = count * sizeof(SkPoint);
RectBoundsAccumulator ptBounds;
for (size_t i = 0; i < count; i++) {
ptBounds.accumulate(pts[i]);
}
SkRect point_bounds = ptBounds.bounds();
if (!AccumulateOpBounds(point_bounds, flags)) {
return;
}
void* data_ptr;
switch (mode) {
case PointMode::kPoints:
data_ptr = Push<DrawPointsOp>(bytes, 1, count);
break;
case PointMode::kLines:
data_ptr = Push<DrawLinesOp>(bytes, 1, count);
break;
case PointMode::kPolygon:
data_ptr = Push<DrawPolygonOp>(bytes, 1, count);
break;
default:
FML_UNREACHABLE();
return;
}
CopyV(data_ptr, pts, count);
// drawPoints treats every point or line (or segment of a polygon)
// as a completely separate operation meaning we cannot ensure
// distribution of group opacity without analyzing the mode and the
// bounds of every sub-primitive.
// See: https://fiddle.skia.org/c/228459001d2de8db117ce25ef5cedb0c
UpdateLayerOpacityCompatibility(false);