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direct_renderer.cc
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direct_renderer.cc
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// Copyright 2012 The Chromium Authors
// 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/direct_renderer.h"
#include <limits.h>
#include <stddef.h>
#include <utility>
#include <vector>
#include "base/auto_reset.h"
#include "base/containers/circular_deque.h"
#include "base/logging.h"
#include "base/metrics/histogram_macros.h"
#include "base/numerics/safe_conversions.h"
#include "base/timer/elapsed_timer.h"
#include "base/trace_event/trace_event.h"
#include "build/build_config.h"
#include "cc/base/math_util.h"
#include "cc/paint/filter_operations.h"
#include "components/viz/common/display/renderer_settings.h"
#include "components/viz/common/features.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/aggregated_render_pass_draw_quad.h"
#include "components/viz/common/quads/compositor_render_pass_draw_quad.h"
#include "components/viz/common/quads/draw_quad.h"
#include "components/viz/common/quads/solid_color_draw_quad.h"
#include "components/viz/common/resources/platform_color.h"
#include "components/viz/common/viz_utils.h"
#include "components/viz/service/display/bsp_tree.h"
#include "components/viz/service/display/bsp_walk_action.h"
#include "components/viz/service/display/output_surface.h"
#include "components/viz/service/display/skia_output_surface.h"
#include "gpu/command_buffer/common/capabilities.h"
#include "media/base/video_util.h"
#include "ui/gfx/geometry/quad_f.h"
#include "ui/gfx/geometry/rect_conversions.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/geometry/transform.h"
#include "ui/gfx/geometry/transform_util.h"
namespace {
// Returns the bounding box that contains the specified rounded corner.
gfx::RectF ComputeRoundedCornerBoundingBox(const gfx::RRectF& rrect,
const gfx::RRectF::Corner corner) {
auto radii = rrect.GetCornerRadii(corner);
gfx::RectF bounding_box(radii.x(), radii.y());
switch (corner) {
case gfx::RRectF::Corner::kUpperLeft:
bounding_box.Offset(rrect.rect().x(), rrect.rect().y());
break;
case gfx::RRectF::Corner::kUpperRight:
bounding_box.Offset(rrect.rect().right() - radii.x(), rrect.rect().y());
break;
case gfx::RRectF::Corner::kLowerRight:
bounding_box.Offset(rrect.rect().right() - radii.x(),
rrect.rect().bottom() - radii.y());
break;
case gfx::RRectF::Corner::kLowerLeft:
bounding_box.Offset(rrect.rect().x(), rrect.rect().bottom() - radii.y());
break;
}
return bounding_box;
}
} // namespace
namespace viz {
DirectRenderer::DrawingFrame::DrawingFrame() = default;
DirectRenderer::DrawingFrame::~DrawingFrame() = default;
DirectRenderer::SwapFrameData::SwapFrameData() = default;
DirectRenderer::SwapFrameData::~SwapFrameData() = default;
DirectRenderer::SwapFrameData::SwapFrameData(SwapFrameData&&) = default;
DirectRenderer::SwapFrameData& DirectRenderer::SwapFrameData::operator=(
SwapFrameData&&) = default;
DirectRenderer::DirectRenderer(const RendererSettings* settings,
const DebugRendererSettings* debug_settings,
OutputSurface* output_surface,
DisplayResourceProvider* resource_provider,
OverlayProcessorInterface* overlay_processor)
: settings_(settings),
debug_settings_(debug_settings),
output_surface_(output_surface),
resource_provider_(resource_provider),
overlay_processor_(overlay_processor),
allow_undamaged_nonroot_render_pass_to_skip_(base::FeatureList::IsEnabled(
features::kAllowUndamagedNonrootRenderPassToSkip)) {
DCHECK(output_surface_);
}
DirectRenderer::~DirectRenderer() = default;
void DirectRenderer::Initialize() {
use_partial_swap_ = settings_->partial_swap_enabled && CanPartialSwap();
allow_empty_swap_ =
use_partial_swap_ ||
output_surface_->capabilities().supports_commit_overlay_planes;
initialized_ = true;
}
// static
gfx::RectF DirectRenderer::QuadVertexRect() {
return gfx::RectF(-0.5f, -0.5f, 1.f, 1.f);
}
// static
void DirectRenderer::QuadRectTransform(gfx::Transform* quad_rect_transform,
const gfx::Transform& quad_transform,
const gfx::RectF& quad_rect) {
*quad_rect_transform = quad_transform;
quad_rect_transform->Translate(0.5 * quad_rect.width() + quad_rect.x(),
0.5 * quad_rect.height() + quad_rect.y());
quad_rect_transform->Scale(quad_rect.width(), quad_rect.height());
}
void DirectRenderer::InitializeViewport(DrawingFrame* frame,
const gfx::Rect& draw_rect,
const gfx::Rect& viewport_rect,
const gfx::Size& surface_size) {
DCHECK_GE(viewport_rect.x(), 0);
DCHECK_GE(viewport_rect.y(), 0);
DCHECK_LE(viewport_rect.right(), surface_size.width());
DCHECK_LE(viewport_rect.bottom(), surface_size.height());
bool flip_y = FlippedFramebuffer();
if (flip_y) {
frame->target_to_device_transform = gfx::OrthoProjectionTransform(
draw_rect.x(), draw_rect.right(), draw_rect.bottom(), draw_rect.y());
} else {
frame->target_to_device_transform = gfx::OrthoProjectionTransform(
draw_rect.x(), draw_rect.right(), draw_rect.y(), draw_rect.bottom());
}
gfx::Rect window_rect = viewport_rect;
if (flip_y)
window_rect.set_y(surface_size.height() - viewport_rect.bottom());
frame->target_to_device_transform.PostConcat(
gfx::WindowTransform(window_rect.x(), window_rect.y(),
window_rect.width(), window_rect.height()));
current_draw_rect_ = draw_rect;
current_viewport_rect_ = viewport_rect;
current_surface_size_ = surface_size;
current_window_space_viewport_ = window_rect;
}
gfx::Rect DirectRenderer::MoveFromDrawToWindowSpace(
const gfx::Rect& draw_rect) const {
gfx::Rect window_rect = draw_rect;
window_rect -= current_draw_rect_.OffsetFromOrigin();
window_rect += current_viewport_rect_.OffsetFromOrigin();
if (FlippedFramebuffer())
window_rect.set_y(current_surface_size_.height() - window_rect.bottom());
return window_rect;
}
const DrawQuad* DirectRenderer::CanPassBeDrawnDirectly(
const AggregatedRenderPass* pass) {
return nullptr;
}
void DirectRenderer::SetVisible(bool visible) {
DCHECK(initialized_);
if (visible_ == visible)
return;
visible_ = visible;
DidChangeVisibility();
}
void DirectRenderer::ReallocatedFrameBuffers() {
next_frame_needs_full_frame_redraw_ = true;
}
void DirectRenderer::Reshape(
const OutputSurface::ReshapeParams& reshape_params) {
output_surface_->Reshape(reshape_params);
}
void DirectRenderer::DecideRenderPassAllocationsForFrame(
const AggregatedRenderPassList& render_passes_in_draw_order) {
DCHECK(render_pass_bypass_quads_.empty());
auto& root_render_pass = render_passes_in_draw_order.back();
base::flat_map<AggregatedRenderPassId, RenderPassRequirements>
render_passes_in_frame;
for (const auto& pass : render_passes_in_draw_order) {
// If there's a copy request, we need an explicit renderpass backing so
// only try to draw directly if there are no copy requests.
bool is_root = pass == root_render_pass;
if (!is_root && pass->copy_requests.empty()) {
if (const DrawQuad* quad = CanPassBeDrawnDirectly(pass.get())) {
// If the render pass is drawn directly, it will not be drawn from as
// a render pass so it's not added to the map.
render_pass_bypass_quads_[pass->id] = quad;
continue;
}
}
gfx::Size size = pass->output_rect.size();
// We should not change the buffer size for the root render pass.
// The requirement is used for non-root render pass only.
if (!is_root) {
size = CalculateTextureSizeForRenderPass(pass.get());
}
auto color_space = RenderPassColorSpace(pass.get());
auto format = GetColorSpaceResourceFormat(color_space);
render_passes_in_frame[pass->id] = {size, pass->generate_mipmap, format,
color_space};
}
UMA_HISTOGRAM_COUNTS_1000(
"Compositing.Display.FlattenedRenderPassCount",
base::saturated_cast<int>(render_passes_in_draw_order.size() -
render_pass_bypass_quads_.size()));
UpdateRenderPassTextures(render_passes_in_draw_order, render_passes_in_frame);
}
void DirectRenderer::DrawFrame(
AggregatedRenderPassList* render_passes_in_draw_order,
float device_scale_factor,
const gfx::Size& device_viewport_size,
const gfx::DisplayColorSpaces& display_color_spaces,
SurfaceDamageRectList surface_damage_rect_list) {
DCHECK(visible_);
TRACE_EVENT0("viz,benchmark", "DirectRenderer::DrawFrame");
UMA_HISTOGRAM_COUNTS_1M(
"Renderer4.renderPassCount",
base::saturated_cast<int>(render_passes_in_draw_order->size()));
auto* root_render_pass = render_passes_in_draw_order->back().get();
DCHECK(root_render_pass);
current_frame_valid_ = true;
current_frame_ = DrawingFrame();
current_frame()->render_passes_in_draw_order = render_passes_in_draw_order;
current_frame()->root_render_pass = root_render_pass;
current_frame()->root_damage_rect = root_render_pass->damage_rect;
if (overlay_processor_) {
current_frame()->root_damage_rect.Union(
overlay_processor_->GetAndResetOverlayDamage());
}
if (auto* ink_renderer =
GetDelegatedInkPointRenderer(/*create_if_necessary=*/false)) {
// The path must be finalized before GetDamageRect() can return an accurate
// rect that will allow the old trail to be removed and the new trail to
// be drawn at the same time.
ink_renderer->FinalizePathForDraw();
gfx::Rect delegated_ink_damage_rect = ink_renderer->GetDamageRect();
// The viewport could have changed size since the presentation area was
// created and propagated, such as if is window was resized. Intersect the
// viewport here to ensure the damage rect doesn't extend beyond the current
// viewport.
delegated_ink_damage_rect.Intersect(gfx::Rect(device_viewport_size));
current_frame()->root_damage_rect.Union(delegated_ink_damage_rect);
}
current_frame()->root_damage_rect.Intersect(gfx::Rect(device_viewport_size));
current_frame()->device_viewport_size = device_viewport_size;
current_frame()->display_color_spaces = display_color_spaces;
// DecideRenderPassAllocationsForFrame needs
// current_frame()->display_color_spaces to decide the color space
// of each render pass.
DecideRenderPassAllocationsForFrame(*render_passes_in_draw_order);
output_surface_->SetNeedsMeasureNextDrawLatency();
BeginDrawingFrame();
// RenderPass owns filters, backdrop_filters, etc., and will outlive this
// function call. So it is safe to store pointers in these maps.
for (const auto& pass : *render_passes_in_draw_order) {
if (!pass->filters.IsEmpty()) {
render_pass_filters_[pass->id] = &pass->filters;
if (pass->filters.HasFilterThatMovesPixels())
has_pixel_moving_foreground_filters_ = true;
}
if (!pass->backdrop_filters.IsEmpty()) {
render_pass_backdrop_filters_[pass->id] = &pass->backdrop_filters;
render_pass_backdrop_filter_bounds_[pass->id] =
pass->backdrop_filter_bounds;
if (pass->backdrop_filters.HasFilterThatMovesPixels()) {
backdrop_filter_output_rects_[pass->id] =
cc::MathUtil::MapEnclosingClippedRect(
pass->transform_to_root_target, pass->output_rect);
}
}
}
bool frame_has_alpha =
current_frame()->root_render_pass->has_transparent_background;
gfx::ColorSpace frame_color_space = RootRenderPassColorSpace();
gfx::BufferFormat frame_buffer_format =
current_frame()->display_color_spaces.GetOutputBufferFormat(
current_frame()->root_render_pass->content_color_usage,
frame_has_alpha);
gfx::Size surface_resource_size =
CalculateSizeForOutputSurface(device_viewport_size);
if (overlay_processor_) {
// Display transform and viewport size are needed for overlay validator on
// Android SurfaceControl, and viewport size is need on Windows. These need
// to be called before ProcessForOverlays.
overlay_processor_->SetDisplayTransformHint(
output_surface_->GetDisplayTransform());
overlay_processor_->SetViewportSize(device_viewport_size);
// Before ProcessForOverlay calls into the hardware to ask about whether the
// overlay setup can be handled, we need to set up the primary plane.
OverlayProcessorInterface::OutputSurfaceOverlayPlane* primary_plane =
nullptr;
if (output_surface_->IsDisplayedAsOverlayPlane()) {
current_frame()->output_surface_plane =
overlay_processor_->ProcessOutputSurfaceAsOverlay(
device_viewport_size, surface_resource_size, frame_buffer_format,
frame_color_space, frame_has_alpha, 1.0f /*opacity*/,
GetPrimaryPlaneOverlayTestingMailbox());
primary_plane = &(current_frame()->output_surface_plane.value());
}
// Attempt to replace some or all of the quads of the root render pass with
// overlays.
base::ElapsedTimer overlay_processing_timer;
overlay_processor_->ProcessForOverlays(
resource_provider_, render_passes_in_draw_order,
output_surface_->color_matrix(), render_pass_filters_,
render_pass_backdrop_filters_, std::move(surface_damage_rect_list),
primary_plane, ¤t_frame()->overlay_list,
¤t_frame()->root_damage_rect,
¤t_frame()->root_content_bounds);
auto overlay_processing_time = overlay_processing_timer.Elapsed();
constexpr auto kMinTime = base::Microseconds(5);
constexpr auto kMaxTime = base::Milliseconds(10);
constexpr int kTimeBuckets = 50;
UMA_HISTOGRAM_CUSTOM_MICROSECONDS_TIMES(
"Compositing.DirectRenderer.OverlayProcessingUs",
overlay_processing_time, kMinTime, kMaxTime, kTimeBuckets);
// If we promote any quad to an underlay then the main plane must support
// alpha.
// TODO(ccameron): We should update |frame_color_space|, and
// |frame_buffer_format| based on the change in |frame_has_alpha|.
if (current_frame()->output_surface_plane) {
frame_has_alpha |= current_frame()->output_surface_plane->enable_blending;
root_render_pass->has_transparent_background = frame_has_alpha;
}
overlay_processor_->AdjustOutputSurfaceOverlay(
&(current_frame()->output_surface_plane));
}
// Only reshape when we know we are going to draw. Otherwise, the reshape
// can leave the window at the wrong size if we never draw and the proper
// viewport size is never set.
skipped_render_pass_ids_.clear();
bool needs_full_frame_redraw = false;
auto display_transform = output_surface_->GetDisplayTransform();
OutputSurface::ReshapeParams reshape_params;
reshape_params.size = surface_resource_size;
reshape_params.device_scale_factor = device_scale_factor;
reshape_params.color_space = frame_color_space;
reshape_params.sdr_white_level = CurrentFrameSDRWhiteLevel();
reshape_params.format = frame_buffer_format;
reshape_params.alpha_type =
frame_has_alpha ? kPremul_SkAlphaType : kOpaque_SkAlphaType;
if (next_frame_needs_full_frame_redraw_ ||
reshape_params != reshape_params_ ||
display_transform != reshape_display_transform_) {
next_frame_needs_full_frame_redraw_ = false;
reshape_params_ = reshape_params;
reshape_display_transform_ = display_transform;
Reshape(reshape_params);
#if BUILDFLAG(IS_APPLE)
// For Mac, all render passes will be promoted to CALayer, the redraw full
// frame is for the main surface only.
// TODO(penghuang): verify this logic with SkiaRenderer.
if (!output_surface_->capabilities().supports_surfaceless)
needs_full_frame_redraw = true;
#else
// The entire surface has to be redrawn if reshape is requested.
needs_full_frame_redraw = true;
#endif
}
// Draw all non-root render passes except for the root render pass.
for (const auto& pass : *render_passes_in_draw_order) {
if (pass.get() == root_render_pass)
break;
DrawRenderPassAndExecuteCopyRequests(pass.get());
}
bool skip_drawing_root_render_pass =
current_frame()->root_damage_rect.IsEmpty() && allow_empty_swap_ &&
!needs_full_frame_redraw;
// If partial swap is not used, and the frame can not be skipped, the whole
// frame has to be redrawn.
if (!use_partial_swap_ && !skip_drawing_root_render_pass)
needs_full_frame_redraw = true;
// If we need to redraw the frame, the whole output should be considered
// damaged.
if (needs_full_frame_redraw)
current_frame()->root_damage_rect = gfx::Rect(device_viewport_size);
if (!skip_drawing_root_render_pass)
DrawRenderPassAndExecuteCopyRequests(root_render_pass);
if (overlay_processor_)
overlay_processor_->TakeOverlayCandidates(¤t_frame()->overlay_list);
FinishDrawingFrame();
if (overlay_processor_)
overlay_processor_->ScheduleOverlays(resource_provider_);
// Total non-root render pass count, excluding root render pass and bypassed
// render passes.
auto nonroot_render_pass_count = render_passes_in_draw_order->size() - 1 -
render_pass_bypass_quads_.size();
if (nonroot_render_pass_count > 0) {
UMA_HISTOGRAM_BOOLEAN(
"Compositing.DirectRenderer.SkipAllNonRootRenderPassesPerFrame",
skipped_render_pass_ids_.size() == nonroot_render_pass_count);
}
// The current drawing frame is valid only during the duration of this
// function. Clear the pointers held inside to avoid holding dangling
// pointers.
current_frame()->render_passes_in_draw_order = nullptr;
current_frame()->root_render_pass = nullptr;
render_passes_in_draw_order->clear();
render_pass_filters_.clear();
render_pass_backdrop_filters_.clear();
render_pass_backdrop_filter_bounds_.clear();
render_pass_bypass_quads_.clear();
backdrop_filter_output_rects_.clear();
has_pixel_moving_foreground_filters_ = false;
current_frame_valid_ = false;
}
gfx::Rect DirectRenderer::GetCurrentFramebufferDamage() const {
return output_surface_->GetCurrentFramebufferDamage();
}
gfx::Rect DirectRenderer::GetTargetDamageBoundingRect() const {
gfx::Rect bounding_rect = GetCurrentFramebufferDamage();
if (overlay_processor_) {
bounding_rect.Union(
overlay_processor_->GetPreviousFrameOverlaysBoundingRect());
}
return bounding_rect;
}
gfx::Rect DirectRenderer::DeviceViewportRectInDrawSpace() const {
gfx::Rect device_viewport_rect(current_frame()->device_viewport_size);
device_viewport_rect -= current_viewport_rect_.OffsetFromOrigin();
device_viewport_rect += current_draw_rect_.OffsetFromOrigin();
return device_viewport_rect;
}
gfx::Rect DirectRenderer::OutputSurfaceRectInDrawSpace() const {
if (current_frame()->current_render_pass ==
current_frame()->root_render_pass) {
return DeviceViewportRectInDrawSpace();
} else {
return current_frame()->current_render_pass->output_rect;
}
}
bool DirectRenderer::ShouldSkipQuad(const DrawQuad& quad,
const gfx::Rect& render_pass_scissor) {
if (render_pass_scissor.IsEmpty())
return true;
gfx::Rect target_rect = cc::MathUtil::MapEnclosingClippedRect(
quad.shared_quad_state->quad_to_target_transform, quad.visible_rect);
if (quad.shared_quad_state->clip_rect)
target_rect.Intersect(*quad.shared_quad_state->clip_rect);
target_rect.Intersect(render_pass_scissor);
return target_rect.IsEmpty();
}
void DirectRenderer::SetScissorStateForQuad(
const DrawQuad& quad,
const gfx::Rect& render_pass_scissor,
bool use_render_pass_scissor) {
if (use_render_pass_scissor) {
gfx::Rect quad_scissor_rect = render_pass_scissor;
if (quad.shared_quad_state->clip_rect)
quad_scissor_rect.Intersect(*quad.shared_quad_state->clip_rect);
SetScissorTestRectInDrawSpace(quad_scissor_rect);
return;
} else if (quad.shared_quad_state->clip_rect) {
SetScissorTestRectInDrawSpace(*quad.shared_quad_state->clip_rect);
return;
}
EnsureScissorTestDisabled();
}
void DirectRenderer::SetScissorTestRectInDrawSpace(
const gfx::Rect& draw_space_rect) {
gfx::Rect window_space_rect = MoveFromDrawToWindowSpace(draw_space_rect);
SetScissorTestRect(window_space_rect);
}
void DirectRenderer::DoDrawPolygon(const DrawPolygon& poly,
const gfx::Rect& render_pass_scissor,
bool use_render_pass_scissor) {
SetScissorStateForQuad(*poly.original_ref(), render_pass_scissor,
use_render_pass_scissor);
// If the poly has not been split, then it is just a normal DrawQuad,
// and we should save any extra processing that would have to be done.
if (!poly.is_split()) {
DoDrawQuad(poly.original_ref(), nullptr);
return;
}
std::vector<gfx::QuadF> quads;
poly.ToQuads2D(&quads);
for (size_t i = 0; i < quads.size(); ++i) {
DoDrawQuad(poly.original_ref(), &quads[i]);
}
}
const cc::FilterOperations* DirectRenderer::FiltersForPass(
AggregatedRenderPassId render_pass_id) const {
auto it = render_pass_filters_.find(render_pass_id);
return it == render_pass_filters_.end() ? nullptr : it->second;
}
const cc::FilterOperations* DirectRenderer::BackdropFiltersForPass(
AggregatedRenderPassId render_pass_id) const {
auto it = render_pass_backdrop_filters_.find(render_pass_id);
return it == render_pass_backdrop_filters_.end() ? nullptr : it->second;
}
const absl::optional<gfx::RRectF> DirectRenderer::BackdropFilterBoundsForPass(
AggregatedRenderPassId render_pass_id) const {
auto it = render_pass_backdrop_filter_bounds_.find(render_pass_id);
return it == render_pass_backdrop_filter_bounds_.end()
? absl::optional<gfx::RRectF>()
: it->second;
}
void DirectRenderer::FlushPolygons(
base::circular_deque<std::unique_ptr<DrawPolygon>>* poly_list,
const gfx::Rect& render_pass_scissor,
bool use_render_pass_scissor) {
if (poly_list->empty()) {
return;
}
BspTree bsp_tree(poly_list);
BspWalkActionDrawPolygon action_handler(this, render_pass_scissor,
use_render_pass_scissor);
bsp_tree.TraverseWithActionHandler(&action_handler);
DCHECK(poly_list->empty());
}
void DirectRenderer::DrawRenderPassAndExecuteCopyRequests(
AggregatedRenderPass* render_pass) {
if (render_pass_bypass_quads_.find(render_pass->id) !=
render_pass_bypass_quads_.end()) {
return;
}
// Repeated draw to simulate a slower device for the evaluation of performance
// improvements in UI effects.
for (int i = 0; i < settings_->slow_down_compositing_scale_factor; ++i)
DrawRenderPass(render_pass);
for (auto& request : render_pass->copy_requests) {
// Finalize the source subrect (output_rect, result_bounds,
// sampling_bounds), as the entirety of the RenderPass's output optionally
// clamped to the requested copy area. Then, compute the result rect
// (result_selection), 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 = render_pass->output_rect;
if (request->has_area())
output_rect.Intersect(request->area());
copy_output::RenderPassGeometry geometry;
geometry.result_bounds =
request->is_scaled() ? copy_output::ComputeResultRect(
gfx::Rect(output_rect.size()),
request->scale_from(), request->scale_to())
: gfx::Rect(output_rect.size());
// Result bounds may not satisfy the pixel format requirements for the
// CopyOutputRequest - we need to adjust them to something that will be
// compatible. Formats other than RGBA have this restriction.
geometry.result_selection =
request->result_format() == CopyOutputRequest::ResultFormat::RGBA
? geometry.result_bounds
: media::MinimallyShrinkRectForI420(geometry.result_bounds);
if (request->has_result_selection())
geometry.result_selection.Intersect(request->result_selection());
if (geometry.result_selection.IsEmpty())
continue;
geometry.sampling_bounds = MoveFromDrawToWindowSpace(output_rect);
geometry.readback_offset =
MoveFromDrawToWindowSpace(geometry.result_selection +
output_rect.OffsetFromOrigin())
.OffsetFromOrigin();
CopyDrawnRenderPass(geometry, std::move(request));
}
}
void DirectRenderer::DrawRenderPass(const AggregatedRenderPass* render_pass) {
TRACE_EVENT0("viz", "DirectRenderer::DrawRenderPass");
bool can_skip_rp = CanSkipRenderPass(render_pass);
if (render_pass != current_frame()->root_render_pass) {
UMA_HISTOGRAM_BOOLEAN("Compositing.DirectRenderer.SkipNonRootRenderPass",
can_skip_rp);
}
if (can_skip_rp) {
skipped_render_pass_ids_.insert(render_pass->id);
return;
}
UseRenderPass(render_pass);
// TODO(crbug.com/582554): This change applies only when Vulkan is enabled and
// it will be removed once SkiaRenderer has complete support for Vulkan.
if (current_frame()->current_render_pass !=
current_frame()->root_render_pass &&
!IsRenderPassResourceAllocated(render_pass->id))
return;
const gfx::Rect surface_rect_in_draw_space = OutputSurfaceRectInDrawSpace();
gfx::Rect render_pass_scissor_in_draw_space = surface_rect_in_draw_space;
bool is_root_render_pass =
current_frame()->current_render_pass == current_frame()->root_render_pass;
if (use_partial_swap_) {
render_pass_scissor_in_draw_space.Intersect(
ComputeScissorRectForRenderPass(current_frame()->current_render_pass));
}
const bool render_pass_is_clipped =
!render_pass_scissor_in_draw_space.Contains(surface_rect_in_draw_space);
// The SetDrawRectangleCHROMIUM spec requires that the scissor bit is always
// set on the root framebuffer or else the rendering may modify something
// outside the damage rectangle, even if the damage rectangle is the size of
// the full backbuffer.
const bool supports_dc_layers =
output_surface_->capabilities().supports_dc_layers;
const bool render_pass_requires_scissor =
render_pass_is_clipped || (supports_dc_layers && is_root_render_pass);
const bool should_clear_surface =
!is_root_render_pass || settings_->should_clear_root_render_pass;
SurfaceInitializationMode mode;
if (should_clear_surface && render_pass_requires_scissor) {
mode = SURFACE_INITIALIZATION_MODE_SCISSORED_CLEAR;
} else if (should_clear_surface) {
mode = SURFACE_INITIALIZATION_MODE_FULL_SURFACE_CLEAR;
} else {
mode = SURFACE_INITIALIZATION_MODE_PRESERVE;
}
PrepareSurfaceForPass(
mode, MoveFromDrawToWindowSpace(render_pass_scissor_in_draw_space));
if (is_root_render_pass)
last_root_render_pass_scissor_rect_ = render_pass_scissor_in_draw_space;
const QuadList& quad_list = render_pass->quad_list;
base::circular_deque<std::unique_ptr<DrawPolygon>> poly_list;
int next_polygon_id = 0;
int last_sorting_context_id = 0;
for (auto it = quad_list.BackToFrontBegin(); it != quad_list.BackToFrontEnd();
++it) {
const DrawQuad& quad = **it;
if (render_pass_is_clipped &&
ShouldSkipQuad(quad, render_pass_scissor_in_draw_space)) {
continue;
}
if (last_sorting_context_id != quad.shared_quad_state->sorting_context_id) {
last_sorting_context_id = quad.shared_quad_state->sorting_context_id;
FlushPolygons(&poly_list, render_pass_scissor_in_draw_space,
render_pass_requires_scissor);
}
// This layer is in a 3D sorting context so we add it to the list of
// polygons to go into the BSP tree.
if (quad.shared_quad_state->sorting_context_id != 0) {
// TODO(danakj): It's sad to do a malloc here to compare. Maybe construct
// this on the stack and move it into the list.
auto new_polygon = std::make_unique<DrawPolygon>(
*it, gfx::RectF(quad.visible_rect),
quad.shared_quad_state->quad_to_target_transform, next_polygon_id++);
if (new_polygon->normal().LengthSquared() > 0.0) {
poly_list.push_back(std::move(new_polygon));
}
continue;
}
// We are not in a 3d sorting context, so we should draw the quad normally.
SetScissorStateForQuad(quad, render_pass_scissor_in_draw_space,
render_pass_requires_scissor);
if (OverlayCandidate::RequiresOverlay(&quad)) {
// We cannot composite this quad properly, replace it with solid black.
SolidColorDrawQuad solid_black;
solid_black.SetAll(quad.shared_quad_state, quad.rect, quad.rect,
/*needs_blending=*/false, SkColors::kBlack,
/*force_anti_aliasing_off=*/true);
DoDrawQuad(&solid_black, nullptr);
continue;
}
DoDrawQuad(&quad, nullptr);
}
FlushPolygons(&poly_list, render_pass_scissor_in_draw_space,
render_pass_requires_scissor);
FinishDrawingQuadList();
if (render_pass->generate_mipmap)
GenerateMipmap();
}
bool DirectRenderer::CanSkipRenderPass(
const AggregatedRenderPass* render_pass) const {
if (render_pass == current_frame()->root_render_pass)
return false;
// If the RenderPass wants to be cached, then we only draw it if we need to.
// When damage is present, then we can't skip the RenderPass. Or if the
// texture does not exist (first frame, or was deleted) then we can't skip
// the RenderPass.
if (render_pass->cache_render_pass ||
allow_undamaged_nonroot_render_pass_to_skip_) {
// TODO(crbug.com/1346502): Fix CopyOutputRequest and allow the render pass
// with copy request to skip.
if (render_pass->has_damage_from_contributing_content ||
!render_pass->copy_requests.empty()) {
return false;
}
return IsRenderPassResourceAllocated(render_pass->id);
}
return false;
}
void DirectRenderer::UseRenderPass(const AggregatedRenderPass* render_pass) {
bool is_root = render_pass == current_frame()->root_render_pass;
current_frame()->current_render_pass = render_pass;
// The root render pass will be either bound to the buffer allocated by
// the SkiaOutputSurface, or if the renderer allocatates images then the root
// render pass buffer will be allocated in
// AllocateRenderPassResourceIfNeeded(), and bound in
// BindFramebufferToTexture().
if (is_root && !output_surface_->capabilities().renderer_allocates_images) {
BindFramebufferToOutputSurface();
if (output_surface_->capabilities().supports_dc_layers)
output_surface_->SetDrawRectangle(current_frame()->root_damage_rect);
InitializeViewport(current_frame(), render_pass->output_rect,
gfx::Rect(current_frame()->device_viewport_size),
current_frame()->device_viewport_size);
return;
}
gfx::Size size = render_pass->output_rect.size();
// We should not change the buffer size for the root render pass.
if (!is_root) {
size = CalculateTextureSizeForRenderPass(render_pass);
size.Enlarge(enlarge_pass_texture_amount_.width(),
enlarge_pass_texture_amount_.height());
}
auto color_space = CurrentRenderPassColorSpace();
auto format = GetColorSpaceResourceFormat(color_space);
AllocateRenderPassResourceIfNeeded(
render_pass->id,
{size, render_pass->generate_mipmap, format, color_space});
// TODO(crbug.com/582554): This change applies only when Vulkan is enabled and
// it will be removed once SkiaRenderer has complete support for Vulkan.
if (!IsRenderPassResourceAllocated(render_pass->id))
return;
BindFramebufferToTexture(render_pass->id);
InitializeViewport(current_frame(), render_pass->output_rect,
gfx::Rect(render_pass->output_rect.size()),
// If the render pass backing is cached, we might have
// bigger size comparing to the size that was generated.
GetRenderPassBackingPixelSize(render_pass->id));
}
gfx::Rect DirectRenderer::ComputeScissorRectForRenderPass(
const AggregatedRenderPass* render_pass) const {
const AggregatedRenderPass* root_render_pass =
current_frame()->root_render_pass;
gfx::Rect root_damage_rect = current_frame()->root_damage_rect;
// If |frame_buffer_damage|, which is carried over from the previous frame
// when we want to preserve buffer content, is not empty, we should add it
// to both root and non-root render passes.
gfx::Rect frame_buffer_damage = GetCurrentFramebufferDamage();
if (render_pass == root_render_pass) {
base::CheckedNumeric<int64_t> display_area =
current_frame()->device_viewport_size.GetCheckedArea();
base::CheckedNumeric<int64_t> root_damage_area =
root_damage_rect.size().GetCheckedArea();
if (display_area.IsValid() && root_damage_area.IsValid()) {
DCHECK_GT(static_cast<int64_t>(display_area.ValueOrDie()), 0);
{
base::CheckedNumeric<int64_t> frame_buffer_damage_area =
frame_buffer_damage.size().GetCheckedArea();
int64_t percentage = ((frame_buffer_damage_area * 100ll) / display_area)
.ValueOrDefault(INT_MAX);
UMA_HISTOGRAM_PERCENTAGE(
"Compositing.DirectRenderer.PartialSwap.FrameBufferDamage",
percentage);
}
{
int64_t percentage =
((root_damage_area * 100ll) / display_area).ValueOrDie();
UMA_HISTOGRAM_PERCENTAGE(
"Compositing.DirectRenderer.PartialSwap.RootDamage", percentage);
}
root_damage_rect.Union(frame_buffer_damage);
// If the root damage rect intersects any child render pass that has a
// pixel-moving backdrop filter, expand the damage to include the entire
// child pass. See crbug.com/986206 for context.
if ((!backdrop_filter_output_rects_.empty() ||
has_pixel_moving_foreground_filters_) &&
!root_damage_rect.IsEmpty()) {
for (auto* quad : root_render_pass->quad_list) {
// Sanity check: we should not have a Compositor
// CompositorRenderPassDrawQuad here.
DCHECK_NE(quad->material, DrawQuad::Material::kCompositorRenderPass);
if (quad->material == DrawQuad::Material::kAggregatedRenderPass) {
const auto* rpdq = AggregatedRenderPassDrawQuad::MaterialCast(quad);
// For render pass with pixel moving backdrop filters.
if (auto iter =
backdrop_filter_output_rects_.find(rpdq->render_pass_id);
iter != backdrop_filter_output_rects_.end()) {
gfx::Rect this_output_rect = iter->second;
if (root_damage_rect.Intersects(this_output_rect))
root_damage_rect.Union(this_output_rect);
}
// For render pass with pixel moving foreground filters.
const cc::FilterOperations* foreground_filters =
FiltersForPass(rpdq->render_pass_id);
if (foreground_filters &&
foreground_filters->HasFilterThatMovesPixels()) {
gfx::Rect expanded_rect =
GetExpandedRectWithPixelMovingForegroundFilter(
*rpdq, *foreground_filters);
if (root_damage_rect.Intersects(expanded_rect))
root_damage_rect.Union(expanded_rect);
}
}
}
}
// Total damage after all adjustments.
base::CheckedNumeric<int64_t> total_damage_area =
root_damage_rect.size().GetCheckedArea();
{
int64_t percentage = ((total_damage_area * 100ll) / display_area)
.ValueOrDefault(INT_MAX);
UMA_HISTOGRAM_PERCENTAGE(
"Compositing.DirectRenderer.PartialSwap.TotalDamage", percentage);
}
{
int64_t percentage =
(((total_damage_area - root_damage_area) * 100ll) / display_area)
.ValueOrDefault(INT_MAX);
UMA_HISTOGRAM_PERCENTAGE(
"Compositing.DirectRenderer.PartialSwap.ExtraDamage", percentage);
}
}
return root_damage_rect;
}
// If the root damage rect has been expanded due to overlays, all the other
// damage rect calculations are incorrect.
if (!root_render_pass->damage_rect.Contains(root_damage_rect))
return render_pass->output_rect;
DCHECK(render_pass->copy_requests.empty() ||
(render_pass->damage_rect == render_pass->output_rect));
// For the non-root render pass.
gfx::Rect damage_rect = render_pass->damage_rect;
if (!frame_buffer_damage.IsEmpty()) {
gfx::Transform inverse_transform;
if (render_pass->transform_to_root_target.GetInverse(&inverse_transform)) {
// |frame_buffer_damage| is in the root target space. Transform the damage
// from the root to the non-root space before it's added.
gfx::Rect frame_buffer_damage_in_render_pass_space =
cc::MathUtil::MapEnclosingClippedRect(inverse_transform,
frame_buffer_damage);
damage_rect.Union(frame_buffer_damage_in_render_pass_space);
}
}
return damage_rect;
}
gfx::Size DirectRenderer::CalculateTextureSizeForRenderPass(
const AggregatedRenderPass* render_pass) {
// Round the size of the render pass backings to a multiple of 64 pixels. This
// reduces memory fragmentation. https://crbug.com/146070. This also allows
// backings to be more easily reused during a resize operation.
int width = render_pass->output_rect.width();
int height = render_pass->output_rect.height();
if (!settings_->dont_round_texture_sizes_for_pixel_tests) {
constexpr int multiple = 64;
width = cc::MathUtil::CheckedRoundUp(width, multiple);
height = cc::MathUtil::CheckedRoundUp(height, multiple);
}
return gfx::Size(width, height);
}
// TODO(fangzhoug): There should be metrics recording the amount of unused
// buffer area and number of reallocations to quantify the trade-off.
gfx::Size DirectRenderer::CalculateSizeForOutputSurface(
const gfx::Size& requested_viewport_size) {
// We're not able to clip back buffers if output surface does not support
// clipping.
if (requested_viewport_size == surface_size_for_swap_buffers() ||
!output_surface_->capabilities().supports_viewporter ||
settings_->dont_round_texture_sizes_for_pixel_tests) {
device_viewport_size_ = requested_viewport_size;
return requested_viewport_size;
}
// If 1 second has passed since last |device_viewport_size_| change, shrink
// OutputSurface size to |device_viewport_size_|.
if (device_viewport_size_ == requested_viewport_size &&
(base::TimeTicks::Now() - last_viewport_resize_time_) >=
base::Seconds(1)) {
return requested_viewport_size;
}
// Round the size of the output surface to a multiple of 256 pixels. This
// allows backings to be more easily reused during a resize operation.
const int request_width = requested_viewport_size.width();
const int request_height = requested_viewport_size.height();
int surface_width = surface_size_for_swap_buffers().width();
int surface_height = surface_size_for_swap_buffers().height();
constexpr int multiple = 256;
// If |request_width| or |request_height| is already a multiple of |multiple|,
// round up extra |multiple| pixels s.t. we always have some amount of
// padding.
if (request_width > surface_width)
surface_width =
cc::MathUtil::CheckedRoundUp(request_width + multiple - 1, multiple);
if (request_height > surface_height)
surface_height =
cc::MathUtil::CheckedRoundUp(request_height + multiple - 1, multiple);
if (requested_viewport_size != device_viewport_size_)
last_viewport_resize_time_ = base::TimeTicks::Now();
// Width & height mustn't be more than max texture size.
if (surface_width > output_surface_->capabilities().max_texture_size) {
auto old_width = surface_width;
surface_width = output_surface_->capabilities().max_texture_size;
LOG_IF(ERROR, surface_width < request_width)
<< "Reduced surface width from " << old_width << " to "
<< surface_width;
}
if (surface_height > output_surface_->capabilities().max_texture_size) {
auto old_height = surface_height;
surface_height = output_surface_->capabilities().max_texture_size;
LOG_IF(ERROR, surface_height < request_height)