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// Copyright 2016 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 "third_party/blink/renderer/platform/graphics/paint/raster_invalidation_tracking.h"
#include "SkImageFilter.h"
#include "third_party/blink/renderer/platform/geometry/geometry_as_json.h"
#include "third_party/blink/renderer/platform/geometry/layout_rect.h"
#include "third_party/blink/renderer/platform/graphics/color.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_canvas.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_recorder.h"
namespace blink {
static bool g_simulate_raster_under_invalidations = false;
void RasterInvalidationTracking::SimulateRasterUnderInvalidations(bool enable) {
g_simulate_raster_under_invalidations = enable;
}
void RasterInvalidationTracking::AddInvalidation(
const DisplayItemClient* client,
const String& debug_name,
const IntRect& rect,
PaintInvalidationReason reason) {
if (rect.IsEmpty())
return;
RasterInvalidationInfo info;
info.client = client;
info.client_debug_name = debug_name;
info.rect = rect;
info.reason = reason;
invalidations_.push_back(info);
// TODO(crbug.com/496260): Some antialiasing effects overflow the paint
// invalidation rect.
IntRect r = rect;
r.Inflate(1);
invalidation_region_since_last_paint_.Unite(r);
}
static bool CompareRasterInvalidationInfo(const RasterInvalidationInfo& a,
const RasterInvalidationInfo& b) {
// Sort by rect first, bigger rects before smaller ones.
if (a.rect.Width() != b.rect.Width())
return a.rect.Width() > b.rect.Width();
if (a.rect.Height() != b.rect.Height())
return a.rect.Height() > b.rect.Height();
if (a.rect.X() != b.rect.X())
return a.rect.X() > b.rect.X();
if (a.rect.Y() != b.rect.Y())
return a.rect.Y() > b.rect.Y();
// Then compare clientDebugName, in alphabetic order.
int name_compare_result =
CodePointCompare(a.client_debug_name, b.client_debug_name);
if (name_compare_result != 0)
return name_compare_result < 0;
return a.reason < b.reason;
}
void RasterInvalidationTracking::AsJSON(JSONObject* json) {
if (!invalidations_.IsEmpty()) {
std::sort(invalidations_.begin(), invalidations_.end(),
&CompareRasterInvalidationInfo);
std::unique_ptr<JSONArray> paint_invalidations_json = JSONArray::Create();
for (auto& info : invalidations_) {
std::unique_ptr<JSONObject> info_json = JSONObject::Create();
info_json->SetString("object", info.client_debug_name);
if (!info.rect.IsEmpty()) {
if (info.rect == LayoutRect::InfiniteIntRect())
info_json->SetString("rect", "infinite");
else
info_json->SetArray("rect", RectAsJSONArray(info.rect));
}
info_json->SetString("reason",
PaintInvalidationReasonToString(info.reason));
paint_invalidations_json->PushObject(std::move(info_json));
}
json->SetArray("paintInvalidations", std::move(paint_invalidations_json));
}
if (!under_invalidations_.IsEmpty()) {
std::unique_ptr<JSONArray> under_paint_invalidations_json =
JSONArray::Create();
for (auto& under_paint_invalidation : under_invalidations_) {
std::unique_ptr<JSONObject> under_paint_invalidation_json =
JSONObject::Create();
under_paint_invalidation_json->SetDouble("x", under_paint_invalidation.x);
under_paint_invalidation_json->SetDouble("y", under_paint_invalidation.y);
under_paint_invalidation_json->SetString(
"oldPixel",
Color(under_paint_invalidation.old_pixel).NameForLayoutTreeAsText());
under_paint_invalidation_json->SetString(
"newPixel",
Color(under_paint_invalidation.new_pixel).NameForLayoutTreeAsText());
under_paint_invalidations_json->PushObject(
std::move(under_paint_invalidation_json));
}
json->SetArray("underPaintInvalidations",
std::move(under_paint_invalidations_json));
}
}
static bool PixelComponentsDiffer(int c1, int c2) {
// Compare strictly for saturated values.
if (c1 == 0 || c1 == 255 || c2 == 0 || c2 == 255)
return c1 != c2;
// Tolerate invisible differences that may occur in gradients etc.
return abs(c1 - c2) > 2;
}
static bool PixelsDiffer(SkColor p1, SkColor p2) {
return PixelComponentsDiffer(SkColorGetA(p1), SkColorGetA(p2)) ||
PixelComponentsDiffer(SkColorGetR(p1), SkColorGetR(p2)) ||
PixelComponentsDiffer(SkColorGetG(p1), SkColorGetG(p2)) ||
PixelComponentsDiffer(SkColorGetB(p1), SkColorGetB(p2));
}
void RasterInvalidationTracking::CheckUnderInvalidations(
const String& layer_debug_name,
sk_sp<PaintRecord> new_record,
const IntRect& new_interest_rect) {
auto old_interest_rect = last_interest_rect_;
Region invalidation_region;
if (!g_simulate_raster_under_invalidations)
invalidation_region = invalidation_region_since_last_paint_;
auto old_record = std::move(last_painted_record_);
last_painted_record_ = new_record;
last_interest_rect_ = new_interest_rect;
invalidation_region_since_last_paint_ = Region();
if (!old_record)
return;
IntRect rect = Intersection(old_interest_rect, new_interest_rect);
// Avoid too big area as the following code is slow.
rect.Intersect(IntRect(rect.X(), rect.Y(), 1200, 6000));
if (rect.IsEmpty())
return;
SkBitmap old_bitmap;
old_bitmap.allocPixels(
SkImageInfo::MakeN32Premul(rect.Width(), rect.Height()));
{
SkiaPaintCanvas canvas(old_bitmap);
canvas.clear(SK_ColorTRANSPARENT);
canvas.translate(-rect.X(), -rect.Y());
canvas.drawPicture(std::move(old_record));
}
SkBitmap new_bitmap;
new_bitmap.allocPixels(
SkImageInfo::MakeN32Premul(rect.Width(), rect.Height()));
{
SkiaPaintCanvas canvas(new_bitmap);
canvas.clear(SK_ColorTRANSPARENT);
canvas.translate(-rect.X(), -rect.Y());
canvas.drawPicture(std::move(new_record));
}
int mismatching_pixels = 0;
static const int kMaxMismatchesToReport = 50;
for (int bitmap_y = 0; bitmap_y < rect.Height(); ++bitmap_y) {
int layer_y = bitmap_y + rect.Y();
for (int bitmap_x = 0; bitmap_x < rect.Width(); ++bitmap_x) {
int layer_x = bitmap_x + rect.X();
SkColor old_pixel = old_bitmap.getColor(bitmap_x, bitmap_y);
SkColor new_pixel = new_bitmap.getColor(bitmap_x, bitmap_y);
if (PixelsDiffer(old_pixel, new_pixel) &&
!invalidation_region.Contains(IntPoint(layer_x, layer_y))) {
if (mismatching_pixels < kMaxMismatchesToReport) {
RasterUnderInvalidation under_invalidation = {layer_x, layer_y,
old_pixel, new_pixel};
under_invalidations_.push_back(under_invalidation);
LOG(ERROR) << layer_debug_name
<< " Uninvalidated old/new pixels mismatch at " << layer_x
<< "," << layer_y << " old:" << std::hex << old_pixel
<< " new:" << new_pixel;
} else if (mismatching_pixels == kMaxMismatchesToReport) {
LOG(ERROR) << "and more...";
}
++mismatching_pixels;
*new_bitmap.getAddr32(bitmap_x, bitmap_y) =
SkColorSetARGB(0xFF, 0xA0, 0, 0); // Dark red.
} else {
*new_bitmap.getAddr32(bitmap_x, bitmap_y) = SK_ColorTRANSPARENT;
}
}
}
if (!mismatching_pixels)
return;
PaintRecorder recorder;
recorder.beginRecording(rect);
auto* canvas = recorder.getRecordingCanvas();
if (under_invalidation_record_)
canvas->drawPicture(std::move(under_invalidation_record_));
canvas->drawBitmap(new_bitmap, rect.X(), rect.Y());
under_invalidation_record_ = recorder.finishRecordingAsPicture();
}
} // namespace blink
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