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Fix support for premultiplied alpha in gaussian blur for now (Cairo surfaces are always premultiplied)

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This commit is contained in:
Joshua Granick
2018-07-20 14:09:44 -07:00
parent 19b745313c
commit c70d864c02
1 changed files with 13 additions and 4 deletions
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17
src/lime/_internal/graphics/ImageDataUtil.hx
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@@ -511,11 +511,17 @@ class ImageDataUtil {
// TODO: Support sourceRect better, do not modify sourceImage, create C++ implementation for native // TODO: Support sourceRect better, do not modify sourceImage, create C++ implementation for native
if (image.buffer.premultiplied || sourceImage.buffer.premultiplied) { // TODO: Faster approach
// TODO: Better handling of premultiplied alpha var imagePremultiplied = image.premultiplied;
throw "Pre-multiplied bitmaps are not supported"; var sourceImagePremultiplied = sourceImage.premultiplied;
if (imagePremultiplied) image.premultiplied = false;
if (sourceImagePremultiplied) sourceImage.premultiplied = false;
} // if (image.buffer.premultiplied || sourceImage.buffer.premultiplied) {
// // TODO: Better handling of premultiplied alpha
// throw "Pre-multiplied bitmaps are not supported";
// }
var boxesForGauss = function (sigma:Float, n:Int):Array<Float> { var boxesForGauss = function (sigma:Float, n:Int):Array<Float> {
var wIdeal = Math.sqrt((12*sigma*sigma/n)+1); // Ideal averaging filter width var wIdeal = Math.sqrt((12*sigma*sigma/n)+1); // Ideal averaging filter width
@@ -665,6 +671,9 @@ class ImageDataUtil {
image.version++; image.version++;
sourceImage.dirty = true; sourceImage.dirty = true;
sourceImage.version++; sourceImage.version++;
if (imagePremultiplied) image.premultiplied = true;
if (sourceImagePremultiplied) sourceImage.premultiplied = true;
if (imgB == image.data) return image; if (imgB == image.data) return image;
return sourceImage; return sourceImage;