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commit cb591075af3a7f698dbc6918e6c8125a2a341879
Author: Carsten Haitzler <ras...@rasterman.com>
AuthorDate: Wed May 4 18:12:24 2022 +0100
evas - png loader - work around libpng arm bug where rgb > a on decode
on arm when a is 0 ... per pixel rgb can be > 0 which violates premul
rgb leading to junk rendering. this now is worked around in the png
loader and forces rgb to 0 when a is 0 per pixel.
@fix
---
.../evas/image_loaders/png/evas_image_load_png.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/src/modules/evas/image_loaders/png/evas_image_load_png.c b/src/modules/evas/image_loaders/png/evas_image_load_png.c
index 9e5073cc5b..7180e0ce22 100644
--- a/src/modules/evas/image_loaders/png/evas_image_load_png.c
+++ b/src/modules/evas/image_loaders/png/evas_image_load_png.c
@@ -596,6 +596,17 @@ evas_image_load_file_head_with_data_png(void *loader_data,
}
free(pixels2);
+ if ((epi.hasa) && (pack_offset == sizeof(DATA32)))
+ {
+ DATA32 *dst_ptr = (DATA32 *) surface;
+ int total = w * h;
+
+ for (i = 0; i < total; i++)
+ {
+ if (A_VAL(dst_ptr) == 0) *dst_ptr = 0;
+ dst_ptr++;
+ }
+ }
prop->info.premul = EINA_TRUE;
*error = EVAS_LOAD_ERROR_NONE;
@@ -882,6 +893,17 @@ evas_image_load_file_data_png(void *loader_data,
}
}
+ if ((epi.hasa) && (pack_offset == sizeof(DATA32)))
+ {
+ DATA32 *dst_ptr = (DATA32 *) surface;
+ int total = w * h;
+
+ for (i = 0; i < total; i++)
+ {
+ if (A_VAL(dst_ptr) == 0) *dst_ptr = 0;
+ dst_ptr++;
+ }
+ }
prop->info.premul = EINA_TRUE;
*error = EVAS_LOAD_ERROR_NONE;
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