Bug 1523228 - Use down scaling more often to avoid blurs on very large blur radii. r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D17797

--HG--
extra : moz-landing-system : lando

gfx/wr/webrender/src/render_task.rs

@@ -38,7 +38,7 @@ use webrender_api::DevicePixel;
 const RENDER_TASK_SIZE_SANITY_CHECK: i32 = 16000;
 const FLOATS_PER_RENDER_TASK_INFO: usize = 8;
 pub const MAX_BLUR_STD_DEVIATION: f32 = 4.0;
-pub const MIN_DOWNSCALING_RT_SIZE: i32 = 128;
+pub const MIN_DOWNSCALING_RT_SIZE: i32 = 8;
 
 fn render_task_sanity_check(size: &DeviceIntSize) {
     if size.width > RENDER_TASK_SIZE_SANITY_CHECK ||

layout/reftests/svg/filters/css-filter-chains/reftest.list

@@ -2,6 +2,6 @@
 # e.g. filter: blur(3px) grayscale(0.5) invert(0.2);
 
 # Some platforms render this complex filter chain a little differently, and that's ok.
-fuzzy(0-5,0-13638) fuzzy-if(/^Windows\x20NT\x2010\.0/.test(http.oscpu)&&layersGPUAccelerated,0-35,0-13638) fuzzy-if(webrender,4-6,12000-18946) == long-chain.html long-chain-ref.html # Win10: Bug 1258241
+fuzzy(0-5,0-13638) fuzzy-if(/^Windows\x20NT\x2010\.0/.test(http.oscpu)&&layersGPUAccelerated,0-35,0-13638) fuzzy-if(webrender,4-6,12000-19484) == long-chain.html long-chain-ref.html # Win10: Bug 1258241
 == moz-element.html moz-element-ref.html
 fuzzy-if(webrender,13-15,7682-7966) == same-filter.html same-filter-ref.html

layout/reftests/svg/filters/css-filters/reftest.list

@@ -6,7 +6,7 @@
 == blur-calc.html blur-calc-ref.html
 == blur-calc-negative.html blur-calc-negative-ref.html
 fuzzy-if(cocoaWidget&&webrender,0-1,0-2) skip-if(d2d) == blur-cap-large-radius-on-software.html blur-cap-large-radius-on-software-ref.html
-fuzzy-if(webrender,3-4,5760-6424) == blur-clip-rect.html ../feGaussianBlur-4-ref.svg
+fuzzy-if(webrender,3-5,5760-8168) == blur-clip-rect.html ../feGaussianBlur-4-ref.svg
 == blur-em-radius.html blur-em-radius-ref.html
 == blur-invalid-radius.html blur-invalid-radius-ref.html
 == blur-rem-radius.html blur-rem-radius-ref.html

layout/reftests/svg/filters/reftest.list

@@ -40,9 +40,9 @@ fuzzy-if(d2d,0-1,0-6400) fuzzy-if(skiaContent,0-1,0-1600)  == feFlood-1.svg feFl
 skip-if(d2d) fuzzy-if(skiaContent,0-1,0-6400) == feFlood-2.svg feFlood-2-ref.svg
 
 fuzzy(0-1,0-6400) fuzzy-if(skiaContent,0-1,0-6404) fuzzy-if(webrender,178-178,3036-3036) == feGaussianBlur-1.svg feGaussianBlur-1-ref.svg
-== feGaussianBlur-2.svg feGaussianBlur-2-ref.svg
+fuzzy-if(webrender,0-2,0-304) == feGaussianBlur-2.svg feGaussianBlur-2-ref.svg
 # != feGaussianBlur-3.svg feGaussianBlur-3-ref.svg
-fuzzy-if(webrender,3-4,5760-6424) == feGaussianBlur-4.svg feGaussianBlur-4-ref.svg
+fuzzy-if(webrender,3-5,5760-8168) == feGaussianBlur-4.svg feGaussianBlur-4-ref.svg
 == feGaussianBlur-5.svg feGaussianBlur-5-ref.svg
 == feGaussianBlur-6.svg feGaussianBlur-6-ref.svg
 skip-if(d2d) == feGaussianBlur-cap-large-directional-radius-on-software.html feGaussianBlur-cap-large-directional-radius-on-software-ref.html

layout/reftests/svg/filters/svg-filter-chains/reftest.list

@@ -4,7 +4,7 @@
 == clip-input.svg clip-input-ref.svg
 == clip-original-SourceGraphic.svg clip-original-SourceGraphic-ref.svg
 == clip-output.svg clip-output-ref.svg
-fuzzy-if(webrender,3-4,17844-18084) == default-subregion.svg default-subregion-ref.svg
+fuzzy-if(webrender,3-5,17844-19776) == default-subregion.svg default-subregion-ref.svg
 == different-FillPaint-filter-regions.svg different-FillPaint-filter-regions-ref.svg
 == different-StrokePaint-filter-regions.svg different-StrokePaint-filter-regions-ref.svg
 == dont-clip-previous-primitives.svg dont-clip-previous-primitives-ref.svg