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LibWeb/Painting: Introduce PaintingCommandExecutor
Decoupling painting command executor from RecordingPainter allows to introduce painters other than CPU Gfx::Painter :)
This commit is contained in:
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1682e46df9
commit
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8 changed files with 627 additions and 477 deletions
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@ -4,441 +4,26 @@
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGfx/Filters/StackBlurFilter.h>
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#include <LibGfx/StylePainter.h>
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#include <LibWeb/Painting/BorderRadiusCornerClipper.h>
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#include <LibWeb/Painting/FilterPainting.h>
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#include <LibWeb/Painting/RecordingPainter.h>
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#include <LibWeb/Painting/ShadowPainting.h>
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namespace Web::Painting {
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struct CommandExecutionState {
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struct StackingContext {
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Gfx::Painter painter;
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Gfx::IntRect destination;
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float opacity;
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};
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[[nodiscard]] Gfx::Painter const& painter() const { return stacking_contexts.last().painter; }
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[[nodiscard]] Gfx::Painter& painter() { return stacking_contexts.last().painter; }
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[[nodiscard]] bool would_be_fully_clipped_by_painter(Gfx::IntRect rect) const
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{
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return !painter().clip_rect().intersects(rect.translated(painter().translation()));
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}
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Vector<StackingContext> stacking_contexts;
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};
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CommandResult FillRectWithRoundedCorners::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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Gfx::AntiAliasingPainter aa_painter(painter);
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if (aa_translation.has_value())
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aa_painter.translate(*aa_translation);
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aa_painter.fill_rect_with_rounded_corners(
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rect,
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color,
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top_left_radius,
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top_right_radius,
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bottom_right_radius,
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bottom_left_radius);
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return CommandResult::Continue;
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}
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CommandResult DrawText::execute(CommandExecutionState& state) const
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{
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if (state.would_be_fully_clipped_by_painter(rect))
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return CommandResult::Continue;
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auto& painter = state.painter();
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if (font.has_value()) {
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painter.draw_text(rect, raw_text, *font, alignment, color, elision, wrapping);
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} else {
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painter.draw_text(rect, raw_text, alignment, color, elision, wrapping);
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}
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return CommandResult::Continue;
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}
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CommandResult DrawTextRun::execute(CommandExecutionState& state) const
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{
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if (state.would_be_fully_clipped_by_painter(rect))
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return CommandResult::Continue;
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auto& painter = state.painter();
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painter.draw_text_run(baseline_start, Utf8View(string), font, color);
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return CommandResult::Continue;
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}
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CommandResult FillPathUsingColor::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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Gfx::AntiAliasingPainter aa_painter(painter);
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if (aa_translation.has_value())
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aa_painter.translate(*aa_translation);
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aa_painter.fill_path(path, color, winding_rule);
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return CommandResult::Continue;
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}
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CommandResult FillPathUsingPaintStyle::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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Gfx::AntiAliasingPainter aa_painter(painter);
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if (aa_translation.has_value())
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aa_painter.translate(*aa_translation);
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aa_painter.fill_path(path, paint_style, opacity, winding_rule);
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return CommandResult::Continue;
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}
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CommandResult StrokePathUsingColor::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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Gfx::AntiAliasingPainter aa_painter(painter);
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if (aa_translation.has_value())
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aa_painter.translate(*aa_translation);
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aa_painter.stroke_path(path, color, thickness);
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return CommandResult::Continue;
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}
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CommandResult StrokePathUsingPaintStyle::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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Gfx::AntiAliasingPainter aa_painter(painter);
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if (aa_translation.has_value())
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aa_painter.translate(*aa_translation);
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aa_painter.stroke_path(path, paint_style, thickness, opacity);
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return CommandResult::Continue;
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}
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CommandResult FillRect::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.fill_rect(rect, color);
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return CommandResult::Continue;
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}
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CommandResult DrawScaledBitmap::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.draw_scaled_bitmap(dst_rect, bitmap, src_rect, opacity, scaling_mode);
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return CommandResult::Continue;
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}
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CommandResult SetClipRect::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.clear_clip_rect();
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painter.add_clip_rect(rect);
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return CommandResult::Continue;
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}
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CommandResult ClearClipRect::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.clear_clip_rect();
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return CommandResult::Continue;
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}
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CommandResult SetFont::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.set_font(font);
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return CommandResult::Continue;
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}
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CommandResult PushStackingContext::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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if (semitransparent_or_has_non_identity_transform) {
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auto destination_rect = transformed_destination_rect.to_rounded<int>();
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// FIXME: We should find a way to scale the paintable, rather than paint into a separate bitmap,
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// then scale it. This snippet now copies the background at the destination, then scales it down/up
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// to the size of the source (which could add some artefacts, though just scaling the bitmap already does that).
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// We need to copy the background at the destination because a bunch of our rendering effects now rely on
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// being able to sample the painter (see border radii, shadows, filters, etc).
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Gfx::FloatPoint destination_clipped_fixup {};
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auto try_get_scaled_destination_bitmap = [&]() -> ErrorOr<NonnullRefPtr<Gfx::Bitmap>> {
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Gfx::IntRect actual_destination_rect;
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auto bitmap = TRY(painter.get_region_bitmap(destination_rect, Gfx::BitmapFormat::BGRA8888, actual_destination_rect));
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// get_region_bitmap() may clip to a smaller region if the requested rect goes outside the painter, so we need to account for that.
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destination_clipped_fixup = Gfx::FloatPoint { destination_rect.location() - actual_destination_rect.location() };
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destination_rect = actual_destination_rect;
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if (source_rect.size() != transformed_destination_rect.size()) {
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auto sx = static_cast<float>(source_rect.width()) / transformed_destination_rect.width();
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auto sy = static_cast<float>(source_rect.height()) / transformed_destination_rect.height();
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bitmap = TRY(bitmap->scaled(sx, sy));
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destination_clipped_fixup.scale_by(sx, sy);
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}
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return bitmap;
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};
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auto bitmap_or_error = try_get_scaled_destination_bitmap();
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if (bitmap_or_error.is_error()) {
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// NOTE: If the creation of the bitmap fails, we need to skip all painting commands that belong to this stacking context.
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// We don't interrupt the execution of painting commands because get_region_bitmap() returns an error if the requested
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// region is outside of the viewport (mmap fails to allocate a zero-size region), which means we can safely proceed
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// with execution of commands outside of this stacking context.
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// FIXME: Change the get_region_bitmap() API to return ErrorOr<Optional<Bitmap>> and exit the execution of commands here
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// if we run out of memory.
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return CommandResult::SkipStackingContext;
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}
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auto bitmap = bitmap_or_error.release_value_but_fixme_should_propagate_errors();
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Gfx::Painter stacking_context_painter(bitmap);
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stacking_context_painter.translate(painter_location + destination_clipped_fixup.to_type<int>());
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state.stacking_contexts.append(CommandExecutionState::StackingContext {
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.painter = stacking_context_painter,
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.destination = destination_rect,
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.opacity = opacity,
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});
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} else {
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state.painter().save();
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}
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return CommandResult::Continue;
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}
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CommandResult PopStackingContext::execute(CommandExecutionState& state) const
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{
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if (semitransparent_or_has_non_identity_transform) {
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auto stacking_context = state.stacking_contexts.take_last();
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auto bitmap = stacking_context.painter.target();
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auto destination_rect = stacking_context.destination;
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if (destination_rect.size() == bitmap->size()) {
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state.painter().blit(destination_rect.location(), *bitmap, bitmap->rect(), stacking_context.opacity);
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} else {
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state.painter().draw_scaled_bitmap(destination_rect, *bitmap, bitmap->rect(), stacking_context.opacity, scaling_mode);
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}
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} else {
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state.painter().restore();
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}
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return CommandResult::Continue;
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}
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CommandResult PushStackingContextWithMask::execute(CommandExecutionState& state) const
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{
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auto bitmap_or_error = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, paint_rect.size());
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if (bitmap_or_error.is_error())
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return CommandResult::Continue;
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auto bitmap = bitmap_or_error.release_value();
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Gfx::Painter stacking_context_painter(bitmap);
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stacking_context_painter.translate(-paint_rect.location());
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state.stacking_contexts.append(CommandExecutionState::StackingContext {
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.painter = stacking_context_painter,
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.destination = {},
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.opacity = 1,
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});
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return CommandResult::Continue;
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}
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CommandResult PopStackingContextWithMask::execute(CommandExecutionState& state) const
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{
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auto stacking_context = state.stacking_contexts.take_last();
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auto bitmap = stacking_context.painter.target();
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if (mask_bitmap)
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bitmap->apply_mask(*mask_bitmap, mask_kind);
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state.painter().blit(paint_rect.location(), *bitmap, bitmap->rect(), opacity);
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return CommandResult::Continue;
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}
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CommandResult PaintLinearGradient::execute(CommandExecutionState& state) const
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{
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auto const& data = linear_gradient_data;
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state.painter().fill_rect_with_linear_gradient(
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gradient_rect, data.color_stops.list,
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data.gradient_angle, data.color_stops.repeat_length);
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return CommandResult::Continue;
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}
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CommandResult PaintRadialGradient::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.fill_rect_with_radial_gradient(rect, radial_gradient_data.color_stops.list, center, size, radial_gradient_data.color_stops.repeat_length);
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return CommandResult::Continue;
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}
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CommandResult PaintConicGradient::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.fill_rect_with_conic_gradient(rect, conic_gradient_data.color_stops.list, position, conic_gradient_data.start_angle, conic_gradient_data.color_stops.repeat_length);
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return CommandResult::Continue;
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}
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Gfx::IntRect PaintOuterBoxShadow::bounding_rect() const
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{
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return get_outer_box_shadow_bounding_rect(outer_box_shadow_params);
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}
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CommandResult PaintOuterBoxShadow::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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paint_outer_box_shadow(painter, outer_box_shadow_params);
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return CommandResult::Continue;
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}
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CommandResult PaintInnerBoxShadow::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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paint_inner_box_shadow(painter, outer_box_shadow_params);
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return CommandResult::Continue;
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}
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CommandResult PaintTextShadow::execute(CommandExecutionState& state) const
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{
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// FIXME: Figure out the maximum bitmap size for all shadows and then allocate it once and reuse it?
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auto maybe_shadow_bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, shadow_bounding_rect.size());
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if (maybe_shadow_bitmap.is_error()) {
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dbgln("Unable to allocate temporary bitmap {} for text-shadow rendering: {}", shadow_bounding_rect.size(), maybe_shadow_bitmap.error());
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return CommandResult::Continue;
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}
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auto shadow_bitmap = maybe_shadow_bitmap.release_value();
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Gfx::Painter shadow_painter { *shadow_bitmap };
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// FIXME: "Spread" the shadow somehow.
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Gfx::IntPoint baseline_start(text_rect.x(), text_rect.y() + fragment_baseline);
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shadow_painter.draw_text_run(baseline_start, Utf8View(text), font, color);
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// Blur
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Gfx::StackBlurFilter filter(*shadow_bitmap);
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filter.process_rgba(blur_radius, color);
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auto& painter = state.painter();
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painter.blit(draw_location, *shadow_bitmap, shadow_bounding_rect);
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return CommandResult::Continue;
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}
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CommandResult DrawEllipse::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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Gfx::AntiAliasingPainter aa_painter(painter);
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aa_painter.draw_ellipse(rect, color, thickness);
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return CommandResult::Continue;
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}
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CommandResult FillElipse::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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Gfx::AntiAliasingPainter aa_painter(painter);
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aa_painter.fill_ellipse(rect, color, blend_mode);
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return CommandResult::Continue;
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}
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CommandResult DrawLine::execute(CommandExecutionState& state) const
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{
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if (style == Gfx::Painter::LineStyle::Dotted) {
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Gfx::AntiAliasingPainter aa_painter(state.painter());
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aa_painter.draw_line(from, to, color, thickness, style, alternate_color);
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} else {
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state.painter().draw_line(from, to, color, thickness, style, alternate_color);
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}
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return CommandResult::Continue;
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}
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CommandResult DrawSignedDistanceField::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.draw_signed_distance_field(rect, color, sdf, smoothing);
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return CommandResult::Continue;
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}
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CommandResult PaintProgressbar::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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Gfx::StylePainter::paint_progressbar(painter, progress_rect, palette, min, max, value, text);
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Gfx::StylePainter::paint_frame(painter, frame_rect, palette, Gfx::FrameStyle::RaisedBox);
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return CommandResult::Continue;
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}
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CommandResult PaintFrame::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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Gfx::StylePainter::paint_frame(painter, rect, palette, style);
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return CommandResult::Continue;
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}
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CommandResult ApplyBackdropFilter::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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// This performs the backdrop filter operation: https://drafts.fxtf.org/filter-effects-2/#backdrop-filter-operation
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// Note: The region bitmap can be smaller than the backdrop_region if it's at the edge of canvas.
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// Note: This is in DevicePixels, but we use an IntRect because `get_region_bitmap()` below writes to it.
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// FIXME: Go through the steps to find the "Backdrop Root Image"
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// https://drafts.fxtf.org/filter-effects-2/#BackdropRoot
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// 1. Copy the Backdrop Root Image into a temporary buffer, such as a raster image. Call this buffer T’.
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Gfx::IntRect actual_region {};
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auto maybe_backdrop_bitmap = painter.get_region_bitmap(backdrop_region, Gfx::BitmapFormat::BGRA8888, actual_region);
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if (actual_region.is_empty())
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return CommandResult::Continue;
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if (maybe_backdrop_bitmap.is_error()) {
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dbgln("Failed get region bitmap for backdrop-filter");
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return CommandResult::Continue;
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}
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auto backdrop_bitmap = maybe_backdrop_bitmap.release_value();
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// 2. Apply the backdrop-filter’s filter operations to the entire contents of T'.
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apply_filter_list(*backdrop_bitmap, backdrop_filter.filters);
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// FIXME: 3. If element B has any transforms (between B and the Backdrop Root), apply the inverse of those transforms to the contents of T’.
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// 4. Apply a clip to the contents of T’, using the border box of element B, including border-radius if specified. Note that the children of B are not considered for the sizing or location of this clip.
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// FIXME: 5. Draw all of element B, including its background, border, and any children elements, into T’.
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// FXIME: 6. If element B has any transforms, effects, or clips, apply those to T’.
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// 7. Composite the contents of T’ into element B’s parent, using source-over compositing.
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painter.blit(actual_region.location(), *backdrop_bitmap, backdrop_bitmap->rect());
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return CommandResult::Continue;
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}
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CommandResult DrawRect::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.draw_rect(rect, color, rough);
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return CommandResult::Continue;
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}
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CommandResult DrawTriangleWave::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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painter.draw_triangle_wave(p1, p2, color, amplitude, thickness);
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return CommandResult::Continue;
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}
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Gfx::IntRect SampleUnderCorners::bounding_rect() const
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{
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return corner_clipper->border_rect().to_type<int>();
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}
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CommandResult SampleUnderCorners::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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corner_clipper->sample_under_corners(painter);
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return CommandResult::Continue;
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}
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Gfx::IntRect BlitCornerClipping::bounding_rect() const
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{
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return corner_clipper->border_rect().to_type<int>();
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}
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CommandResult BlitCornerClipping::execute(CommandExecutionState& state) const
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{
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auto& painter = state.painter();
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corner_clipper->blit_corner_clipping(painter);
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return CommandResult::Continue;
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}
|
||||
|
||||
void RecordingPainter::sample_under_corners(NonnullRefPtr<BorderRadiusCornerClipper> corner_clipper)
|
||||
{
|
||||
push_command(SampleUnderCorners { corner_clipper });
|
||||
|
@ -825,22 +410,117 @@ static Optional<Gfx::IntRect> command_bounding_rectangle(PaintingCommand const&
|
|||
});
|
||||
}
|
||||
|
||||
void RecordingPainter::execute(Gfx::Bitmap& bitmap)
|
||||
void RecordingPainter::execute(PaintingCommandExecutor& executor)
|
||||
{
|
||||
CommandExecutionState state;
|
||||
state.stacking_contexts.append(CommandExecutionState::StackingContext {
|
||||
.painter = Gfx::Painter(bitmap),
|
||||
.destination = Gfx::IntRect { 0, 0, 0, 0 },
|
||||
.opacity = 1,
|
||||
});
|
||||
|
||||
size_t next_command_index = 0;
|
||||
while (next_command_index < m_painting_commands.size()) {
|
||||
auto& command = m_painting_commands[next_command_index++];
|
||||
auto bounding_rect = command_bounding_rectangle(command);
|
||||
if (bounding_rect.has_value() && state.would_be_fully_clipped_by_painter(*bounding_rect))
|
||||
if (bounding_rect.has_value() && executor.would_be_fully_clipped_by_painter(*bounding_rect)) {
|
||||
continue;
|
||||
auto result = command.visit([&](auto const& command) { return command.execute(state); });
|
||||
}
|
||||
|
||||
auto result = command.visit(
|
||||
[&](DrawTextRun const& command) {
|
||||
return executor.draw_text_run(command.color, command.baseline_start, command.string, command.font);
|
||||
},
|
||||
[&](DrawText const& command) {
|
||||
return executor.draw_text(command.rect, command.raw_text, command.alignment, command.color, command.elision, command.wrapping, command.font);
|
||||
},
|
||||
[&](FillRect const& command) {
|
||||
return executor.fill_rect(command.rect, command.color);
|
||||
},
|
||||
[&](DrawScaledBitmap const& command) {
|
||||
return executor.draw_scaled_bitmap(command.dst_rect, command.bitmap, command.src_rect, command.opacity, command.scaling_mode);
|
||||
},
|
||||
[&](SetClipRect const& command) {
|
||||
return executor.set_clip_rect(command.rect);
|
||||
},
|
||||
[&](ClearClipRect const&) {
|
||||
return executor.clear_clip_rect();
|
||||
},
|
||||
[&](SetFont const& command) {
|
||||
return executor.set_font(command.font);
|
||||
},
|
||||
[&](PushStackingContext const& command) {
|
||||
return executor.push_stacking_context(command.semitransparent_or_has_non_identity_transform, command.opacity, command.source_rect, command.transformed_destination_rect, command.painter_location);
|
||||
},
|
||||
[&](PopStackingContext const& command) {
|
||||
return executor.pop_stacking_context(command.semitransparent_or_has_non_identity_transform, command.scaling_mode);
|
||||
},
|
||||
[&](PushStackingContextWithMask const& command) {
|
||||
return executor.push_stacking_context_with_mask(command.paint_rect);
|
||||
},
|
||||
[&](PopStackingContextWithMask const& command) {
|
||||
return executor.pop_stacking_context_with_mask(command.paint_rect, command.mask_bitmap, command.mask_kind, command.opacity);
|
||||
},
|
||||
[&](PaintLinearGradient const& command) {
|
||||
return executor.paint_linear_gradient(command.gradient_rect, command.linear_gradient_data);
|
||||
},
|
||||
[&](PaintRadialGradient const& command) {
|
||||
return executor.paint_radial_gradient(command.rect, command.radial_gradient_data, command.center, command.size);
|
||||
},
|
||||
[&](PaintConicGradient const& command) {
|
||||
return executor.paint_conic_gradient(command.rect, command.conic_gradient_data, command.position);
|
||||
},
|
||||
[&](PaintOuterBoxShadow const& command) {
|
||||
return executor.paint_outer_box_shadow(command.outer_box_shadow_params);
|
||||
},
|
||||
[&](PaintInnerBoxShadow const& command) {
|
||||
return executor.paint_inner_box_shadow(command.outer_box_shadow_params);
|
||||
},
|
||||
[&](PaintTextShadow const& command) {
|
||||
return executor.paint_text_shadow(command.blur_radius, command.shadow_bounding_rect, command.text_rect, command.text, command.font, command.color, command.fragment_baseline, command.draw_location);
|
||||
},
|
||||
[&](FillRectWithRoundedCorners const& command) {
|
||||
return executor.fill_rect_with_rounded_corners(command.rect, command.color, command.top_left_radius, command.top_right_radius, command.bottom_left_radius, command.bottom_right_radius, command.aa_translation);
|
||||
},
|
||||
[&](FillPathUsingColor const& command) {
|
||||
return executor.fill_path_using_color(command.path, command.color, command.winding_rule, command.aa_translation);
|
||||
},
|
||||
[&](FillPathUsingPaintStyle const& command) {
|
||||
return executor.fill_path_using_paint_style(command.path, command.paint_style, command.winding_rule, command.opacity, command.aa_translation);
|
||||
},
|
||||
[&](StrokePathUsingColor const& command) {
|
||||
return executor.stroke_path_using_color(command.path, command.color, command.thickness, command.aa_translation);
|
||||
},
|
||||
[&](StrokePathUsingPaintStyle const& command) {
|
||||
return executor.stroke_path_using_paint_style(command.path, command.paint_style, command.thickness, command.opacity, command.aa_translation);
|
||||
},
|
||||
[&](DrawEllipse const& command) {
|
||||
return executor.draw_ellipse(command.rect, command.color, command.thickness);
|
||||
},
|
||||
[&](FillElipse const& command) {
|
||||
return executor.fill_ellipse(command.rect, command.color, command.blend_mode);
|
||||
},
|
||||
[&](DrawLine const& command) {
|
||||
return executor.draw_line(command.color, command.from, command.to, command.thickness, command.style, command.alternate_color);
|
||||
},
|
||||
[&](DrawSignedDistanceField const& command) {
|
||||
return executor.draw_signed_distance_field(command.rect, command.color, command.sdf, command.smoothing);
|
||||
},
|
||||
[&](PaintProgressbar const& command) {
|
||||
return executor.paint_progressbar(command.frame_rect, command.progress_rect, command.palette, command.min, command.max, command.value, command.text);
|
||||
},
|
||||
[&](PaintFrame const& command) {
|
||||
return executor.paint_frame(command.rect, command.palette, command.style);
|
||||
},
|
||||
[&](ApplyBackdropFilter const& command) {
|
||||
return executor.apply_backdrop_filter(command.backdrop_region, command.backdrop_filter);
|
||||
},
|
||||
[&](DrawRect const& command) {
|
||||
return executor.draw_rect(command.rect, command.color, command.rough);
|
||||
},
|
||||
[&](DrawTriangleWave const& command) {
|
||||
return executor.draw_triangle_wave(command.p1, command.p2, command.color, command.amplitude, command.thickness);
|
||||
},
|
||||
[&](SampleUnderCorners const& command) {
|
||||
return executor.sample_under_corners(command.corner_clipper);
|
||||
},
|
||||
[&](BlitCornerClipping const& command) {
|
||||
return executor.blit_corner_clipping(command.corner_clipper);
|
||||
});
|
||||
|
||||
if (result == CommandResult::SkipStackingContext) {
|
||||
auto stacking_context_nesting_level = 1;
|
||||
while (next_command_index < m_painting_commands.size()) {
|
||||
|
@ -857,8 +537,6 @@ void RecordingPainter::execute(Gfx::Bitmap& bitmap)
|
|||
}
|
||||
}
|
||||
}
|
||||
|
||||
VERIFY(state.stacking_contexts.size() == 1);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue