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chromium / chromium / src / 7aa12b976402ffce6084fb9b053867a506048b5a / . / components / viz / service / display / software_renderer.cc
blob: 6726cf71f1fd1c162e5ee81de2520e94a5f09b2c [file] [log] [blame]
// Copyright 2012 The Chromium 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 "components/viz/service/display/software_renderer.h"
#include "base/trace_event/trace_event.h"
#include "cc/base/math_util.h"
#include "cc/paint/image_provider.h"
#include "cc/paint/render_surface_filters.h"
#include "components/viz/common/display/renderer_settings.h"
#include "components/viz/common/frame_sinks/copy_output_request.h"
#include "components/viz/common/frame_sinks/copy_output_util.h"
#include "components/viz/common/quads/debug_border_draw_quad.h"
#include "components/viz/common/quads/picture_draw_quad.h"
#include "components/viz/common/quads/render_pass_draw_quad.h"
#include "components/viz/common/quads/solid_color_draw_quad.h"
#include "components/viz/common/quads/texture_draw_quad.h"
#include "components/viz/common/quads/tile_draw_quad.h"
#include "components/viz/service/display/output_surface.h"
#include "components/viz/service/display/output_surface_frame.h"
#include "components/viz/service/display/renderer_utils.h"
#include "components/viz/service/display/software_output_device.h"
#include "skia/ext/image_operations.h"
#include "skia/ext/opacity_filter_canvas.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkColor.h"
#include "third_party/skia/include/core/SkColorSpaceXformCanvas.h"
#include "third_party/skia/include/core/SkImageFilter.h"
#include "third_party/skia/include/core/SkMatrix.h"
#include "third_party/skia/include/core/SkPath.h"
#include "third_party/skia/include/core/SkPoint.h"
#include "third_party/skia/include/core/SkShader.h"
#include "third_party/skia/include/effects/SkShaderMaskFilter.h"
#include "ui/gfx/geometry/axis_transform2d.h"
#include "ui/gfx/geometry/rect_conversions.h"
#include "ui/gfx/skia_util.h"
#include "ui/gfx/transform.h"
namespace viz {
namespace {
class AnimatedImagesProvider : public cc::ImageProvider {
public:
AnimatedImagesProvider(
const PictureDrawQuad::ImageAnimationMap* image_animation_map)
: image_animation_map_(image_animation_map) {}
~AnimatedImagesProvider() override = default;
ScopedDecodedDrawImage GetDecodedDrawImage(
const cc::DrawImage& draw_image) override {
const auto& paint_image = draw_image.paint_image();
auto it = image_animation_map_->find(paint_image.stable_id());
size_t frame_index = it == image_animation_map_->end()
? cc::PaintImage::kDefaultFrameIndex
: it->second;
return ScopedDecodedDrawImage(cc::DecodedDrawImage(
paint_image.GetSkImageForFrame(
frame_index, cc::PaintImage::kDefaultGeneratorClientId),
SkSize::Make(0, 0), SkSize::Make(1.f, 1.f), draw_image.filter_quality(),
true /* is_budgeted */));
}
private:
const PictureDrawQuad::ImageAnimationMap* image_animation_map_;
};
} // namespace
SoftwareRenderer::SoftwareRenderer(const RendererSettings* settings,
OutputSurface* output_surface,
DisplayResourceProvider* resource_provider)
: DirectRenderer(settings, output_surface, resource_provider),
output_device_(output_surface->software_device()) {}
SoftwareRenderer::~SoftwareRenderer() {}
bool SoftwareRenderer::CanPartialSwap() {
return true;
}
void SoftwareRenderer::BeginDrawingFrame() {
TRACE_EVENT0("viz", "SoftwareRenderer::BeginDrawingFrame");
root_canvas_ = output_device_->BeginPaint(current_frame()->root_damage_rect);
}
void SoftwareRenderer::FinishDrawingFrame() {
TRACE_EVENT0("viz", "SoftwareRenderer::FinishDrawingFrame");
current_framebuffer_canvas_.reset();
current_canvas_ = nullptr;
root_canvas_ = nullptr;
output_device_->EndPaint();
}
void SoftwareRenderer::SwapBuffers(std::vector<ui::LatencyInfo> latency_info) {
DCHECK(visible_);
TRACE_EVENT0("viz", "SoftwareRenderer::SwapBuffers");
OutputSurfaceFrame output_frame;
output_frame.latency_info = std::move(latency_info);
output_surface_->SwapBuffers(std::move(output_frame));
}
bool SoftwareRenderer::FlippedFramebuffer() const {
return false;
}
void SoftwareRenderer::EnsureScissorTestEnabled() {
is_scissor_enabled_ = true;
}
void SoftwareRenderer::EnsureScissorTestDisabled() {
is_scissor_enabled_ = false;
}
void SoftwareRenderer::BindFramebufferToOutputSurface() {
DCHECK(!output_surface_->HasExternalStencilTest());
current_framebuffer_canvas_.reset();
current_canvas_ = root_canvas_;
}
void SoftwareRenderer::BindFramebufferToTexture(
const RenderPassId render_pass_id) {
auto it = render_pass_bitmaps_.find(render_pass_id);
DCHECK(it != render_pass_bitmaps_.end());
SkBitmap& bitmap = it->second;
current_framebuffer_canvas_ = std::make_unique<SkCanvas>(bitmap);
current_canvas_ = current_framebuffer_canvas_.get();
}
void SoftwareRenderer::SetScissorTestRect(const gfx::Rect& scissor_rect) {
is_scissor_enabled_ = true;
scissor_rect_ = scissor_rect;
}
void SoftwareRenderer::SetClipRect(const gfx::Rect& rect) {
if (!current_canvas_)
return;
// Skia applies the current matrix to clip rects so we reset it temporary.
SkMatrix current_matrix = current_canvas_->getTotalMatrix();
current_canvas_->resetMatrix();
// SetClipRect is assumed to be applied temporarily, on an
// otherwise-unclipped canvas.
DCHECK_EQ(current_canvas_->getDeviceClipBounds().width(),
current_canvas_->imageInfo().width());
DCHECK_EQ(current_canvas_->getDeviceClipBounds().height(),
current_canvas_->imageInfo().height());
current_canvas_->clipRect(gfx::RectToSkRect(rect));
current_canvas_->setMatrix(current_matrix);
}
void SoftwareRenderer::ClearCanvas(SkColor color) {
if (!current_canvas_)
return;
if (is_scissor_enabled_) {
// The same paint used by SkCanvas::clear, but applied to the scissor rect.
SkPaint clear_paint;
clear_paint.setColor(color);
clear_paint.setBlendMode(SkBlendMode::kSrc);
current_canvas_->drawRect(gfx::RectToSkRect(scissor_rect_), clear_paint);
} else {
current_canvas_->clear(color);
}
}
void SoftwareRenderer::ClearFramebuffer() {
if (current_frame()->current_render_pass->has_transparent_background) {
ClearCanvas(SkColorSetARGB(0, 0, 0, 0));
} else {
#ifndef NDEBUG
// On DEBUG builds, opaque render passes are cleared to blue
// to easily see regions that were not drawn on the screen.
ClearCanvas(SkColorSetARGB(255, 0, 0, 255));
#endif
}
}
void SoftwareRenderer::PrepareSurfaceForPass(
SurfaceInitializationMode initialization_mode,
const gfx::Rect& render_pass_scissor) {
switch (initialization_mode) {
case SURFACE_INITIALIZATION_MODE_PRESERVE:
EnsureScissorTestDisabled();
return;
case SURFACE_INITIALIZATION_MODE_FULL_SURFACE_CLEAR:
EnsureScissorTestDisabled();
ClearFramebuffer();
break;
case SURFACE_INITIALIZATION_MODE_SCISSORED_CLEAR:
SetScissorTestRect(render_pass_scissor);
ClearFramebuffer();
break;
}
}
bool SoftwareRenderer::IsSoftwareResource(ResourceId resource_id) const {
return resource_provider_->IsResourceSoftwareBacked(resource_id);
}
void SoftwareRenderer::DoDrawQuad(const DrawQuad* quad,
const gfx::QuadF* draw_region) {
if (!current_canvas_)
return;
TRACE_EVENT0("viz", "SoftwareRenderer::DoDrawQuad");
bool do_save = draw_region || is_scissor_enabled_;
SkAutoCanvasRestore canvas_restore(current_canvas_, do_save);
if (is_scissor_enabled_) {
SetClipRect(scissor_rect_);
}
gfx::Transform quad_rect_matrix;
QuadRectTransform(&quad_rect_matrix,
quad->shared_quad_state->quad_to_target_transform,
gfx::RectF(quad->rect));
gfx::Transform contents_device_transform =
current_frame()->window_matrix * current_frame()->projection_matrix *
quad_rect_matrix;
contents_device_transform.FlattenTo2d();
SkMatrix sk_device_matrix;
gfx::TransformToFlattenedSkMatrix(contents_device_transform,
&sk_device_matrix);
current_canvas_->setMatrix(sk_device_matrix);
current_paint_.reset();
if (settings_->force_antialiasing ||
!IsScaleAndIntegerTranslate(sk_device_matrix)) {
// TODO(danakj): Until we can enable AA only on exterior edges of the
// layer, disable AA if any interior edges are present. crbug.com/248175
bool all_four_edges_are_exterior =
quad->IsTopEdge() && quad->IsLeftEdge() && quad->IsBottomEdge() &&
quad->IsRightEdge();
if (settings_->allow_antialiasing &&
(settings_->force_antialiasing || all_four_edges_are_exterior))
current_paint_.setAntiAlias(true);
current_paint_.setFilterQuality(kLow_SkFilterQuality);
}
if (quad->ShouldDrawWithBlending() ||
quad->shared_quad_state->blend_mode != SkBlendMode::kSrcOver) {
current_paint_.setAlpha(quad->shared_quad_state->opacity * 255);
current_paint_.setBlendMode(quad->shared_quad_state->blend_mode);
} else {
current_paint_.setBlendMode(SkBlendMode::kSrc);
}
if (draw_region) {
gfx::QuadF local_draw_region(*draw_region);
SkPath draw_region_clip_path;
local_draw_region -=
gfx::Vector2dF(quad->visible_rect.x(), quad->visible_rect.y());
local_draw_region.Scale(1.0f / quad->visible_rect.width(),
1.0f / quad->visible_rect.height());
local_draw_region -= gfx::Vector2dF(0.5f, 0.5f);
SkPoint clip_points[4];
QuadFToSkPoints(local_draw_region, clip_points);
draw_region_clip_path.addPoly(clip_points, 4, true);
current_canvas_->clipPath(draw_region_clip_path);
}
switch (quad->material) {
case DrawQuad::DEBUG_BORDER:
DrawDebugBorderQuad(DebugBorderDrawQuad::MaterialCast(quad));
break;
case DrawQuad::PICTURE_CONTENT:
DrawPictureQuad(PictureDrawQuad::MaterialCast(quad));
break;
case DrawQuad::RENDER_PASS:
DrawRenderPassQuad(RenderPassDrawQuad::MaterialCast(quad));
break;
case DrawQuad::SOLID_COLOR:
DrawSolidColorQuad(SolidColorDrawQuad::MaterialCast(quad));
break;
case DrawQuad::TEXTURE_CONTENT:
DrawTextureQuad(TextureDrawQuad::MaterialCast(quad));
break;
case DrawQuad::TILED_CONTENT:
DrawTileQuad(TileDrawQuad::MaterialCast(quad));
break;
case DrawQuad::SURFACE_CONTENT:
// Surface content should be fully resolved to other quad types before
// reaching a direct renderer.
NOTREACHED();
break;
case DrawQuad::INVALID:
case DrawQuad::YUV_VIDEO_CONTENT:
case DrawQuad::STREAM_VIDEO_CONTENT:
DrawUnsupportedQuad(quad);
NOTREACHED();
break;
}
current_canvas_->resetMatrix();
}
void SoftwareRenderer::DrawDebugBorderQuad(const DebugBorderDrawQuad* quad) {
// We need to apply the matrix manually to have pixel-sized stroke width.
SkPoint vertices[4];
gfx::RectFToSkRect(QuadVertexRect()).toQuad(vertices);
SkPoint transformed_vertices[4];
current_canvas_->getTotalMatrix().mapPoints(transformed_vertices, vertices,
4);
current_canvas_->resetMatrix();
current_paint_.setColor(quad->color);
current_paint_.setAlpha(quad->shared_quad_state->opacity *
SkColorGetA(quad->color));
current_paint_.setStyle(SkPaint::kStroke_Style);
current_paint_.setStrokeWidth(quad->width);
current_canvas_->drawPoints(SkCanvas::kPolygon_PointMode, 4,
transformed_vertices, current_paint_);
}
void SoftwareRenderer::DrawPictureQuad(const PictureDrawQuad* quad) {
SkMatrix content_matrix;
content_matrix.setRectToRect(gfx::RectFToSkRect(quad->tex_coord_rect),
gfx::RectFToSkRect(QuadVertexRect()),
SkMatrix::kFill_ScaleToFit);
current_canvas_->concat(content_matrix);
const bool needs_transparency =
SkScalarRoundToInt(quad->shared_quad_state->opacity * 255) < 255;
const bool disable_image_filtering =
disable_picture_quad_image_filtering_ || quad->nearest_neighbor;
TRACE_EVENT0("viz", "SoftwareRenderer::DrawPictureQuad");
SkCanvas* raster_canvas = current_canvas_;
std::unique_ptr<SkCanvas> color_transform_canvas;
// TODO(enne): color transform needs to be replicated in gles2_cmd_decoder
color_transform_canvas = SkCreateColorSpaceXformCanvas(
current_canvas_, gfx::ColorSpace::CreateSRGB().ToSkColorSpace());
raster_canvas = color_transform_canvas.get();
base::Optional<skia::OpacityFilterCanvas> opacity_canvas;
if (needs_transparency || disable_image_filtering) {
// TODO(aelias): This isn't correct in all cases. We should detect these
// cases and fall back to a persistent bitmap backing
// (http://crbug.com/280374).
// TODO(vmpstr): Fold this canvas into playback and have raster source
// accept a set of settings on playback that will determine which canvas to
// apply. (http://crbug.com/594679)
opacity_canvas.emplace(raster_canvas, quad->shared_quad_state->opacity,
disable_image_filtering);
raster_canvas = &*opacity_canvas;
}
// Treat all subnormal values as zero for performance.
cc::ScopedSubnormalFloatDisabler disabler;
// Use an image provider to select the correct frame for animated images.
AnimatedImagesProvider image_provider(&quad->image_animation_map);
raster_canvas->save();
raster_canvas->translate(-quad->content_rect.x(), -quad->content_rect.y());
raster_canvas->clipRect(gfx::RectToSkRect(quad->content_rect));
raster_canvas->scale(quad->contents_scale, quad->contents_scale);
quad->display_item_list->Raster(raster_canvas, &image_provider);
raster_canvas->restore();
}
void SoftwareRenderer::DrawSolidColorQuad(const SolidColorDrawQuad* quad) {
gfx::RectF visible_quad_vertex_rect = cc::MathUtil::ScaleRectProportional(
QuadVertexRect(), gfx::RectF(quad->rect), gfx::RectF(quad->visible_rect));
current_paint_.setColor(quad->color);
current_paint_.setAlpha(quad->shared_quad_state->opacity *
SkColorGetA(quad->color));
current_canvas_->drawRect(gfx::RectFToSkRect(visible_quad_vertex_rect),
current_paint_);
}
void SoftwareRenderer::DrawTextureQuad(const TextureDrawQuad* quad) {
if (!IsSoftwareResource(quad->resource_id())) {
DrawUnsupportedQuad(quad);
return;
}
// TODO(skaslev): Add support for non-premultiplied alpha.
DisplayResourceProvider::ScopedReadLockSkImage lock(resource_provider_,
quad->resource_id());
if (!lock.valid())
return;
const SkImage* image = lock.sk_image();
gfx::RectF uv_rect = gfx::ScaleRect(
gfx::BoundingRect(quad->uv_top_left, quad->uv_bottom_right),
image->width(), image->height());
gfx::RectF visible_uv_rect = cc::MathUtil::ScaleRectProportional(
uv_rect, gfx::RectF(quad->rect), gfx::RectF(quad->visible_rect));
SkRect sk_uv_rect = gfx::RectFToSkRect(visible_uv_rect);
gfx::RectF visible_quad_vertex_rect = cc::MathUtil::ScaleRectProportional(
QuadVertexRect(), gfx::RectF(quad->rect), gfx::RectF(quad->visible_rect));
SkRect quad_rect = gfx::RectFToSkRect(visible_quad_vertex_rect);
if (quad->y_flipped)
current_canvas_->scale(1, -1);
bool blend_background =
quad->background_color != SK_ColorTRANSPARENT && !image->isOpaque();
bool needs_layer = blend_background && (current_paint_.getAlpha() != 0xFF);
if (needs_layer) {
current_canvas_->saveLayerAlpha(&quad_rect, current_paint_.getAlpha());
current_paint_.setAlpha(0xFF);
}
if (blend_background) {
SkPaint background_paint;
background_paint.setColor(quad->background_color);
current_canvas_->drawRect(quad_rect, background_paint);
}
current_paint_.setFilterQuality(
quad->nearest_neighbor ? kNone_SkFilterQuality : kLow_SkFilterQuality);
current_canvas_->drawImageRect(image, sk_uv_rect, quad_rect, &current_paint_);
if (needs_layer)
current_canvas_->restore();
}
void SoftwareRenderer::DrawTileQuad(const TileDrawQuad* quad) {
// |resource_provider_| can be NULL in resourceless software draws, which
// should never produce tile quads in the first place.
DCHECK(resource_provider_);
DCHECK(IsSoftwareResource(quad->resource_id()));
DisplayResourceProvider::ScopedReadLockSkImage lock(resource_provider_,
quad->resource_id());
if (!lock.valid())
return;
gfx::RectF visible_tex_coord_rect = cc::MathUtil::ScaleRectProportional(
quad->tex_coord_rect, gfx::RectF(quad->rect),
gfx::RectF(quad->visible_rect));
gfx::RectF visible_quad_vertex_rect = cc::MathUtil::ScaleRectProportional(
QuadVertexRect(), gfx::RectF(quad->rect), gfx::RectF(quad->visible_rect));
SkRect uv_rect = gfx::RectFToSkRect(visible_tex_coord_rect);
current_paint_.setFilterQuality(
quad->nearest_neighbor ? kNone_SkFilterQuality : kLow_SkFilterQuality);
current_canvas_->drawImageRect(lock.sk_image(), uv_rect,
gfx::RectFToSkRect(visible_quad_vertex_rect),
&current_paint_);
}
void SoftwareRenderer::DrawRenderPassQuad(const RenderPassDrawQuad* quad) {
auto it = render_pass_bitmaps_.find(quad->render_pass_id);
if (it == render_pass_bitmaps_.end())
return;
SkBitmap& source_bitmap = it->second;
SkRect dest_rect = gfx::RectFToSkRect(QuadVertexRect());
SkRect dest_visible_rect =
gfx::RectFToSkRect(cc::MathUtil::ScaleRectProportional(
QuadVertexRect(), gfx::RectF(quad->rect),
gfx::RectF(quad->visible_rect)));
SkRect content_rect = RectFToSkRect(quad->tex_coord_rect);
sk_sp<SkImage> filter_image;
const cc::FilterOperations* filters = FiltersForPass(quad->render_pass_id);
if (filters) {
DCHECK(!filters->IsEmpty());
auto paint_filter = cc::RenderSurfaceFilters::BuildImageFilter(
*filters, gfx::SizeF(source_bitmap.width(), source_bitmap.height()));
auto image_filter =
paint_filter ? paint_filter->cached_sk_filter_ : nullptr;
if (image_filter) {
SkIRect result_rect;
// TODO(ajuma): Apply the filter in the same pass as the content where
// possible (e.g. when there's no origin offset). See crbug.com/308201.
filter_image = ApplyImageFilter(image_filter.get(), quad, source_bitmap,
&result_rect);
if (result_rect.isEmpty()) {
return;
}
if (filter_image) {
gfx::RectF rect = gfx::SkRectToRectF(SkRect::Make(result_rect));
dest_rect = dest_visible_rect =
gfx::RectFToSkRect(cc::MathUtil::ScaleRectProportional(
QuadVertexRect(), gfx::RectF(quad->rect), rect));
content_rect =
SkRect::MakeWH(result_rect.width(), result_rect.height());
}
}
}
SkMatrix content_mat;
content_mat.setRectToRect(content_rect, dest_rect,
SkMatrix::kFill_ScaleToFit);
sk_sp<SkShader> shader;
if (!filter_image) {
shader =
SkShader::MakeBitmapShader(source_bitmap, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode, &content_mat);
} else {
shader = filter_image->makeShader(SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode, &content_mat);
}
if (quad->mask_resource_id()) {
DisplayResourceProvider::ScopedReadLockSkImage mask_lock(
resource_provider_, quad->mask_resource_id());
if (!mask_lock.valid())
return;
// Scale normalized uv rect into absolute texel coordinates.
SkRect mask_rect = gfx::RectFToSkRect(
gfx::ScaleRect(quad->mask_uv_rect, quad->mask_texture_size.width(),
quad->mask_texture_size.height()));
SkMatrix mask_mat;
mask_mat.setRectToRect(mask_rect, dest_rect, SkMatrix::kFill_ScaleToFit);
current_paint_.setMaskFilter(
SkShaderMaskFilter::Make(mask_lock.sk_image()->makeShader(
SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, &mask_mat)));
}
// If we have a background filter shader, render its results first.
sk_sp<SkShader> background_filter_shader =
GetBackgroundFilterShader(quad, SkShader::kClamp_TileMode);
if (background_filter_shader) {
SkPaint paint;
paint.setShader(std::move(background_filter_shader));
paint.setMaskFilter(current_paint_.refMaskFilter());
current_canvas_->drawRect(dest_visible_rect, paint);
}
current_paint_.setShader(std::move(shader));
current_canvas_->drawRect(dest_visible_rect, current_paint_);
}
void SoftwareRenderer::DrawUnsupportedQuad(const DrawQuad* quad) {
#ifdef NDEBUG
current_paint_.setColor(SK_ColorWHITE);
#else
current_paint_.setColor(SK_ColorMAGENTA);
#endif
current_paint_.setAlpha(quad->shared_quad_state->opacity * 255);
current_canvas_->drawRect(gfx::RectFToSkRect(QuadVertexRect()),
current_paint_);
}
void SoftwareRenderer::CopyDrawnRenderPass(
std::unique_ptr<CopyOutputRequest> request) {
// Finalize the source subrect, as the entirety of the RenderPass's output
// optionally clamped to the requested copy area. Then, compute the result
// rect, which is the selection clamped to the maximum possible result bounds.
// If there will be zero pixels of output or the scaling ratio was not
// reasonable, do not proceed.
gfx::Rect output_rect = current_frame()->current_render_pass->output_rect;
if (request->has_area())
output_rect.Intersect(request->area());
const gfx::Rect result_bounds =
request->is_scaled() ? copy_output::ComputeResultRect(
gfx::Rect(output_rect.size()),
request->scale_from(), request->scale_to())
: gfx::Rect(output_rect.size());
gfx::Rect result_rect = result_bounds;
if (request->has_result_selection())
result_rect.Intersect(request->result_selection());
if (result_rect.IsEmpty())
return;
SkBitmap bitmap;
if (request->is_scaled()) {
// Resolve the source for the scaling input: Initialize a SkPixmap that
// selects the current RenderPass's output rect within the current canvas
// and provides access to its pixels.
SkPixmap render_pass_output;
if (!current_canvas_->peekPixels(&render_pass_output))
return;
{
const gfx::Rect subrect = MoveFromDrawToWindowSpace(output_rect);
render_pass_output = SkPixmap(
render_pass_output.info().makeWH(subrect.width(), subrect.height()),
render_pass_output.addr(subrect.x(), subrect.y()),
render_pass_output.rowBytes());
}
// Execute the scaling: For downscaling, use the RESIZE_BETTER strategy
// (appropriate for thumbnailing); and, for upscaling, use the RESIZE_BEST
// strategy. Note that processing is only done on the subset of the
// RenderPass output that contributes to the result.
using skia::ImageOperations;
const bool is_downscale_in_both_dimensions =
request->scale_to().x() < request->scale_from().x() &&
request->scale_to().y() < request->scale_from().y();
const ImageOperations::ResizeMethod method =
is_downscale_in_both_dimensions ? ImageOperations::RESIZE_BETTER
: ImageOperations::RESIZE_BEST;
bitmap = ImageOperations::Resize(
render_pass_output, method, result_bounds.width(),
result_bounds.height(),
SkIRect{result_rect.x(), result_rect.y(), result_rect.right(),
result_rect.bottom()});
} else /* if (!request->is_scaled()) */ {
const gfx::Rect window_copy_rect =
MoveFromDrawToWindowSpace(result_rect + output_rect.OffsetFromOrigin());
bitmap.allocPixels(SkImageInfo::MakeN32Premul(
window_copy_rect.width(), window_copy_rect.height(),
current_canvas_->imageInfo().refColorSpace()));
if (!current_canvas_->readPixels(bitmap, window_copy_rect.x(),
window_copy_rect.y()))
return;
}
// Deliver the result. SoftwareRenderer supports RGBA_BITMAP and I420_PLANES
// only. For legacy reasons, if a RGBA_TEXTURE request is being made, clients
// are prepared to accept RGBA_BITMAP results.
//
// TODO(crbug/754872): Get rid of the legacy behavior and send empty results
// for RGBA_TEXTURE requests once tab capture is moved into VIZ.
const CopyOutputResult::Format result_format =
(request->result_format() == CopyOutputResult::Format::RGBA_TEXTURE)
? CopyOutputResult::Format::RGBA_BITMAP
: request->result_format();
// Note: The CopyOutputSkBitmapResult automatically provides I420 format
// conversion, if needed.
request->SendResult(std::make_unique<CopyOutputSkBitmapResult>(
result_format, result_rect, bitmap));
}
void SoftwareRenderer::SetEnableDCLayers(bool enable) {
NOTIMPLEMENTED();
}
void SoftwareRenderer::DidChangeVisibility() {
if (visible_)
output_surface_->EnsureBackbuffer();
else
output_surface_->DiscardBackbuffer();
}
void SoftwareRenderer::GenerateMipmap() {
NOTIMPLEMENTED();
}
bool SoftwareRenderer::ShouldApplyBackgroundFilters(
const RenderPassDrawQuad* quad,
const cc::FilterOperations* backdrop_filters) const {
if (!backdrop_filters)
return false;
DCHECK(!backdrop_filters->IsEmpty());
return true;
}
// If non-null, auto_bounds will be filled with the automatically-computed
// destination bounds. If null, the output will be the same size as the
// input bitmap.
sk_sp<SkImage> SoftwareRenderer::ApplyImageFilter(
SkImageFilter* filter,
const RenderPassDrawQuad* quad,
const SkBitmap& to_filter,
SkIRect* auto_bounds) const {
if (!filter)
return nullptr;
SkMatrix local_matrix;
local_matrix.setTranslate(quad->filters_origin.x(), quad->filters_origin.y());
local_matrix.postScale(quad->filters_scale.x(), quad->filters_scale.y());
SkIRect dst_rect;
if (auto_bounds) {
dst_rect =
filter->filterBounds(gfx::RectToSkIRect(quad->rect), local_matrix,
SkImageFilter::kForward_MapDirection);
*auto_bounds = dst_rect;
} else {
dst_rect = to_filter.bounds();
}
SkImageInfo dst_info =
SkImageInfo::MakeN32Premul(dst_rect.width(), dst_rect.height());
sk_sp<SkSurface> surface = SkSurface::MakeRaster(dst_info);
if (!surface) {
return nullptr;
}
SkPaint paint;
// Treat subnormal float values as zero for performance.
cc::ScopedSubnormalFloatDisabler disabler;
paint.setImageFilter(filter->makeWithLocalMatrix(local_matrix));
surface->getCanvas()->translate(-dst_rect.x(), -dst_rect.y());
surface->getCanvas()->drawBitmap(to_filter, quad->rect.x(), quad->rect.y(),
&paint);
return surface->makeImageSnapshot();
}
SkBitmap SoftwareRenderer::GetBackdropBitmap(
const gfx::Rect& bounding_rect) const {
SkBitmap bitmap;
bitmap.allocPixels(SkImageInfo::MakeN32Premul(bounding_rect.width(),
bounding_rect.height()));
if (!current_canvas_->readPixels(bitmap, bounding_rect.x(),
bounding_rect.y()))
bitmap.reset();
return bitmap;
}
gfx::Rect SoftwareRenderer::GetBackdropBoundingBoxForRenderPassQuad(
const RenderPassDrawQuad* quad,
const gfx::Transform& contents_device_transform,
const cc::FilterOperations* backdrop_filters,
gfx::Rect* unclipped_rect) const {
DCHECK(ShouldApplyBackgroundFilters(quad, backdrop_filters));
gfx::Rect backdrop_rect = gfx::ToEnclosingRect(cc::MathUtil::MapClippedRect(
contents_device_transform, QuadVertexRect()));
SkMatrix matrix;
matrix.setScale(quad->filters_scale.x(), quad->filters_scale.y());
backdrop_rect = backdrop_filters->MapRectReverse(backdrop_rect, matrix);
*unclipped_rect = backdrop_rect;
backdrop_rect.Intersect(MoveFromDrawToWindowSpace(
current_frame()->current_render_pass->output_rect));
return backdrop_rect;
}
sk_sp<SkShader> SoftwareRenderer::GetBackgroundFilterShader(
const RenderPassDrawQuad* quad,
SkShader::TileMode content_tile_mode) const {
const cc::FilterOperations* backdrop_filters =
BackgroundFiltersForPass(quad->render_pass_id);
const cc::FilterOperations* regular_filters =
FiltersForPass(quad->render_pass_id);
if (!ShouldApplyBackgroundFilters(quad, backdrop_filters))
return nullptr;
gfx::Transform quad_rect_matrix;
QuadRectTransform(&quad_rect_matrix,
quad->shared_quad_state->quad_to_target_transform,
gfx::RectF(quad->rect));
gfx::Transform contents_device_transform =
current_frame()->window_matrix * current_frame()->projection_matrix *
quad_rect_matrix;
contents_device_transform.FlattenTo2d();
gfx::Rect unclipped_rect;
gfx::Rect backdrop_rect = GetBackdropBoundingBoxForRenderPassQuad(
quad, contents_device_transform, backdrop_filters, &unclipped_rect);
// Figure out the transformations to move it back to pixel space.
gfx::Transform contents_device_transform_inverse;
if (!contents_device_transform.GetInverse(&contents_device_transform_inverse))
return nullptr;
SkMatrix filter_backdrop_transform =
contents_device_transform_inverse.matrix();
filter_backdrop_transform.preTranslate(backdrop_rect.x(), backdrop_rect.y());
// Draw what's behind, and apply the filter to it.
SkBitmap backdrop_bitmap = GetBackdropBitmap(backdrop_rect);
gfx::Vector2dF clipping_offset =
(unclipped_rect.top_right() - backdrop_rect.top_right()) +
(backdrop_rect.bottom_left() - unclipped_rect.bottom_left());
// Update the backdrop filter to include "regular" filters and opacity.
cc::FilterOperations backdrop_filters_plus_effects = *backdrop_filters;
if (regular_filters) {
for (const auto& filter_op : regular_filters->operations())
backdrop_filters_plus_effects.Append(filter_op);
}
if (quad->shared_quad_state->opacity < 1.0) {
backdrop_filters_plus_effects.Append(
cc::FilterOperation::CreateOpacityFilter(
quad->shared_quad_state->opacity));
}
sk_sp<SkImageFilter> filter =
cc::RenderSurfaceFilters::BuildImageFilter(
backdrop_filters_plus_effects,
gfx::SizeF(backdrop_bitmap.width(), backdrop_bitmap.height()),
clipping_offset)
->cached_sk_filter_;
sk_sp<SkImage> filter_backdrop_image =
ApplyImageFilter(filter.get(), quad, backdrop_bitmap, nullptr);
if (!filter_backdrop_image)
return nullptr;
return filter_backdrop_image->makeShader(content_tile_mode, content_tile_mode,
&filter_backdrop_transform);
}
void SoftwareRenderer::UpdateRenderPassTextures(
const RenderPassList& render_passes_in_draw_order,
const base::flat_map<RenderPassId, RenderPassRequirements>&
render_passes_in_frame) {
std::vector<RenderPassId> passes_to_delete;
for (const auto& pair : render_pass_bitmaps_) {
auto render_pass_it = render_passes_in_frame.find(pair.first);
if (render_pass_it == render_passes_in_frame.end()) {
passes_to_delete.push_back(pair.first);
continue;
}
gfx::Size required_size = render_pass_it->second.size;
// The RenderPassRequirements have a hint, which is only used for gpu
// compositing so it is ignored here.
const SkBitmap& bitmap = pair.second;
bool size_appropriate = bitmap.width() >= required_size.width() &&
bitmap.height() >= required_size.height();
if (!size_appropriate)
passes_to_delete.push_back(pair.first);
}
// Delete RenderPass bitmaps from the previous frame that will not be used
// again.
for (const RenderPassId& id : passes_to_delete)
render_pass_bitmaps_.erase(id);
}
void SoftwareRenderer::AllocateRenderPassResourceIfNeeded(
const RenderPassId& render_pass_id,
const RenderPassRequirements& requirements) {
auto it = render_pass_bitmaps_.find(render_pass_id);
if (it != render_pass_bitmaps_.end())
return;
// The |requirements.mipmap| is only used for gpu-based rendering, so not used
// here.
//
// ColorSpace correctness for software compositing is a performance nightmare,
// so we don't do it. If we did, then the color space of the current frame's
// |current_render_pass| should be stored somewhere, but we should not set it
// on the bitmap itself. Instead, we'd use it with a SkColorSpaceXformCanvas
// that wraps the SkCanvas drawing into the bitmap.
SkImageInfo info =
SkImageInfo::MakeN32(requirements.size.width(),
requirements.size.height(), kPremul_SkAlphaType);
SkBitmap bitmap;
bitmap.allocPixels(info);
render_pass_bitmaps_.emplace(render_pass_id, std::move(bitmap));
}
bool SoftwareRenderer::IsRenderPassResourceAllocated(
const RenderPassId& render_pass_id) const {
auto it = render_pass_bitmaps_.find(render_pass_id);
return it != render_pass_bitmaps_.end();
}
gfx::Size SoftwareRenderer::GetRenderPassBackingPixelSize(
const RenderPassId& render_pass_id) {
auto it = render_pass_bitmaps_.find(render_pass_id);
DCHECK(it != render_pass_bitmaps_.end());
SkBitmap& bitmap = it->second;
return gfx::Size(bitmap.width(), bitmap.height());
}
} // namespace viz