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From bdd76190e54e6a0e11343dd19e4bf1d06956fa48 Mon Sep 17 00:00:00 2001
From: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>
Date: Wed, 13 Feb 2019 01:02:27 +0000
Subject: [PATCH] BaseRenderingContext2D: Use base::CheckMul and simplify code
in putImageData()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Follow-up to commit e0b3253a56 ("Fix image conversion truncation issues").
The current code does not build with GCC due to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89287:
../../third_party/blink/renderer/modules/canvas/canvas2d/base_rendering_context_2d.cc: In member function ‘void blink::BaseRenderingContext2D::putImageData(blink::ImageData*, int, int, int, int, int, int, blink::ExceptionState&)’:
../../third_party/blink/renderer/modules/canvas/canvas2d/base_rendering_context_2d.cc:1777:44: error: default type conversion can't deduce template argument for ‘template<class Dst, typename std::enable_if<base::internal::IsNumericRangeContained<Dst, long unsigned int, void>::value, void>::type* <anonymous> > constexpr base::internal::StrictNumeric<T>::operator Dst() const [with Dst = Dst; typename std::enable_if<base::internal::IsNumericRangeContained<Dst, T>::value>::type* <anonymous> = <enumerator>; T = long unsigned int]’
new uint8_t[data_length.ValueOrDie()]);
^
Work around it by using the more idiomatic base::CheckMul() with
AssignIfValid, so that we can have |data_length| be a size_t again and not
leave it to the compiler to figure out the type we want when creating the
|converted_pixels| array.
Bug: 819294
Change-Id: Id124cc4f3d749b45def4708e21e4badafd708578
Reviewed-on: https://chromium-review.googlesource.com/c/1467201
Auto-Submit: Raphael Kubo da Costa <raphael.kubo.da.costa@intel.com>
Commit-Queue: Kentaro Hara <haraken@chromium.org>
Reviewed-by: Kentaro Hara <haraken@chromium.org>
Cr-Commit-Position: refs/heads/master@{#631472}
---
.../canvas/canvas2d/base_rendering_context_2d.cc | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/third_party/blink/renderer/modules/canvas/canvas2d/base_rendering_context_2d.cc b/third_party/blink/renderer/modules/canvas/canvas2d/base_rendering_context_2d.cc
index d9fa696c9a9d..34a8a202bfd3 100644
--- a/third_party/blink/renderer/modules/canvas/canvas2d/base_rendering_context_2d.cc
+++ b/third_party/blink/renderer/modules/canvas/canvas2d/base_rendering_context_2d.cc
@@ -1769,12 +1769,12 @@ void BaseRenderingContext2D::putImageData(ImageData* data,
CanvasColorParams(ColorParams().ColorSpace(), PixelFormat(), kNonOpaque);
if (data_color_params.NeedsColorConversion(context_color_params) ||
PixelFormat() == kF16CanvasPixelFormat) {
- base::CheckedNumeric<size_t> data_length = data->Size().Area();
- data_length *= context_color_params.BytesPerPixel();
- if (!data_length.IsValid())
+ size_t data_length;
+ if (!base::CheckMul(data->Size().Area(),
+ context_color_params.BytesPerPixel())
+ .AssignIfValid(&data_length))
return;
- std::unique_ptr<uint8_t[]> converted_pixels(
- new uint8_t[data_length.ValueOrDie()]);
+ std::unique_ptr<uint8_t[]> converted_pixels(new uint8_t[data_length]);
if (data->ImageDataInCanvasColorSettings(
ColorParams().ColorSpace(), PixelFormat(), converted_pixels.get(),
kRGBAColorType)) {
--
2.20.1
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