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// Copyright 2019 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/common/viz_utils.h"
#include <algorithm>
#include <vector>
#include "base/command_line.h"
#include "base/system/sys_info.h"
#include "build/build_config.h"
#include "cc/base/features.h"
#include "cc/base/math_util.h"
#include "components/viz/common/frame_sinks/copy_output_request.h"
#include "components/viz/common/quads/render_pass_draw_quad_internal.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/geometry/rect_conversions.h"
#include "ui/gfx/geometry/rrect_f.h"
#if BUILDFLAG(IS_ANDROID)
#include <array>
#include <string>
#include "base/android/build_info.h"
#endif
#if BUILDFLAG(IS_POSIX)
#include <poll.h>
#include <sys/resource.h>
#endif
namespace viz {
#if BUILDFLAG(IS_ANDROID)
bool PreferRGB565ResourcesForDisplay() {
return base::SysInfo::AmountOfPhysicalMemoryMB() <= 512;
}
#endif
#if BUILDFLAG(IS_ANDROID)
bool AlwaysUseWideColorGamut() {
// Full stack integration tests draw in sRGB and expect to read back in sRGB.
// WideColorGamut causes pixels to be drawn in P3, but read back doesn't tell
// us the color space. So disable WCG for tests.
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
static const char kDisableWCGForTest[] = "disable-wcg-for-test";
if (command_line.HasSwitch(kDisableWCGForTest))
return false;
// As it takes some work to compute this, cache the result.
static bool is_always_use_wide_color_gamut_enabled = [] {
const std::string& current_model =
base::android::BuildInfo::GetInstance()->model();
const std::array<std::string, 2> enabled_models = {
std::string{"Pixel 4"}, std::string{"Pixel 4 XL"}};
for (const std::string& model : enabled_models) {
if (model == current_model) {
return true;
}
}
return false;
}();
return is_always_use_wide_color_gamut_enabled;
}
#endif
bool GatherFDStats(base::TimeDelta* delta_time_taken,
int* fd_max,
int* active_fd_count,
int* rlim_cur) {
#if !BUILDFLAG(IS_POSIX)
return false;
#else // BUILDFLAG(IS_POSIX)
// https://stackoverflow.com/questions/7976769/
// getting-count-of-current-used-file-descriptors-from-c-code
base::ElapsedTimer timer;
rlimit limit_data;
getrlimit(RLIMIT_NOFILE, &limit_data);
std::vector<pollfd> poll_data;
constexpr int kMaxNumFDTested = 1 << 16;
// |rlim_cur| is the soft max but is likely the value we can rely on instead
// of the real max.
*rlim_cur = static_cast<int>(limit_data.rlim_cur);
*fd_max = std::max(1, std::min(*rlim_cur, kMaxNumFDTested));
poll_data.resize(*fd_max);
for (size_t i = 0; i < poll_data.size(); i++) {
auto& each = poll_data[i];
each.fd = static_cast<int>(i);
each.events = 0;
each.revents = 0;
}
poll(poll_data.data(), poll_data.size(), 0);
*active_fd_count = 0;
for (auto&& each : poll_data) {
if (each.revents != POLLNVAL)
(*active_fd_count)++;
}
*delta_time_taken = timer.Elapsed();
return true;
#endif // BUILDFLAG(IS_POSIX)
}
gfx::RectF ClippedQuadRectangleF(const DrawQuad* quad) {
gfx::RectF quad_rect = cc::MathUtil::MapClippedRect(
quad->shared_quad_state->quad_to_target_transform,
gfx::RectF(quad->rect));
if (quad->shared_quad_state->clip_rect)
quad_rect.Intersect(gfx::RectF(*quad->shared_quad_state->clip_rect));
return quad_rect;
}
gfx::Rect ClippedQuadRectangle(const DrawQuad* quad) {
return gfx::ToEnclosingRect(ClippedQuadRectangleF(quad));
}
gfx::Rect GetTargetExpandedRectForPixelMovingFilters(
const RenderPassDrawQuadInternal& rpdq,
const cc::FilterOperations& filters) {
const SharedQuadState* shared_quad_state = rpdq.shared_quad_state;
gfx::Rect expanded_rect = GetExpandedRectForPixelMovingFilters(rpdq, filters);
return cc::MathUtil::MapEnclosingClippedRect(
shared_quad_state->quad_to_target_transform, expanded_rect);
}
gfx::Rect GetExpandedRectForPixelMovingFilters(
const RenderPassDrawQuadInternal& rpdq,
const cc::FilterOperations& filters) {
if (!base::FeatureList::IsEnabled(features::kUseMapRectForPixelMovement)) {
// ExpandRectForPixelMovement() has several problems that
// GetExpandedRectForPixelMovingFilters() by calling MapRect instead.
// 1. ExpandRectForPixelMovement's bounds propagation logic does not
// perfectly match how the underlying SkImageFilters compose together.
// 2. It doesn't handle reference image filters, and assumes a fixed outset.
// 3. It is unaware of the RPDQ's filters_origin and filters_scale, which
// define the matrix that must be passed into MapRect.
//
// When the MapRect feature is disabled, this preserves historic behavior
// for callsites that used to call ExpandRectForPixelMovement directly, or
// for callers of GetExpandedRectWithPixelMovingForegroundFilter (which is
// now equivalent to GetTargetExpandedRectForPixelMovingFilters).
return filters.ExpandRectForPixelMovement(rpdq.rect);
}
SkMatrix local_matrix =
SkMatrix::Translate(rpdq.filters_origin.x(), rpdq.filters_origin.y());
local_matrix.postScale(rpdq.filters_scale.x(), rpdq.filters_scale.y());
return filters.MapRect(rpdq.visible_rect, local_matrix);
}
gfx::Transform GetViewTransitionTransform(
gfx::Rect shared_element_quad,
gfx::Rect view_transition_content_output) {
gfx::Transform view_transition_transform;
view_transition_transform.Translate(shared_element_quad.x(),
shared_element_quad.y());
view_transition_transform.Scale(
shared_element_quad.width() /
static_cast<SkScalar>(view_transition_content_output.width()),
shared_element_quad.height() /
static_cast<SkScalar>(view_transition_content_output.height()));
view_transition_transform.Translate(-view_transition_content_output.x(),
-view_transition_content_output.y());
return view_transition_transform;
}
bool QuadRoundedCornersBoundsIntersects(const DrawQuad* quad,
const gfx::RectF& target_quad) {
const SharedQuadState* sqs = quad->shared_quad_state;
const gfx::MaskFilterInfo& mask_filter_info = sqs->mask_filter_info;
// There is no rounded corner set.
if (!mask_filter_info.HasRoundedCorners()) {
return false;
}
const gfx::RRectF& rounded_corner_bounds =
mask_filter_info.rounded_corner_bounds();
const gfx::RRectF::Corner corners[] = {
gfx::RRectF::Corner::kUpperLeft, gfx::RRectF::Corner::kUpperRight,
gfx::RRectF::Corner::kLowerRight, gfx::RRectF::Corner::kLowerLeft};
for (auto c : corners) {
if (rounded_corner_bounds.CornerBoundingRect(c).Intersects(target_quad)) {
return true;
}
}
return false;
}
void SetCopyOutputRequestResultSize(CopyOutputRequest* request,
const gfx::Rect& src_rect,
const gfx::Size& output_size,
const gfx::Size& surface_size_in_pixels) {
CHECK(request);
if (!src_rect.IsEmpty()) {
request->set_area(src_rect);
}
if (output_size.IsEmpty()) {
return;
}
// The CopyOutputRequest API does not allow fixing the output size. Instead
// we have the set area and scale in such a way that it would result in the
// desired output size.
if (!request->has_area()) {
request->set_area(gfx::Rect(surface_size_in_pixels));
}
request->set_result_selection(gfx::Rect(output_size));
const gfx::Rect& area = request->area();
// Viz would normally return an empty result for an empty area.
// However, this guard here is still necessary to protect against setting
// an illegal scaling ratio.
if (area.IsEmpty()) {
return;
}
request->SetScaleRatio(
gfx::Vector2d(area.width(), area.height()),
gfx::Vector2d(output_size.width(), output_size.height()));
}
} // namespace viz
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