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commit 98e6b9332a05261a7a773204b32e6d1ef5cc9c44
Author: [email protected] <[email protected]>
AuthorDate: Mon Aug 10 21:07:54 2026 -0600
fix(evas_ector_gl): flush before reusing span textures across passes
eng_ector_begin resets the collector counts but keeps the collectors, so a
second pass on the same ector surface reuses slot 0 and its
Evas_GL_Texture, overwriting it in place. Uploads happen before the flush,
so on a surface rendered twice in one frame the second pass's span data
reached GL ahead of the draw that was supposed to read the first pass's -
the first pass then sampled the wrong spans.
Drain pending draws when a pass starts on a surface that still has live
collectors. In the ordinary single-pass case eng_ector_end has already
flushed via target_surface_set, so this costs a check that stops at the
first empty pipe.
---
src/modules/evas/engines/gl_generic/evas_engine.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/src/modules/evas/engines/gl_generic/evas_engine.c b/src/modules/evas/engines/gl_generic/evas_engine.c
index a6c54d0a75..089de72ed5 100644
--- a/src/modules/evas/engines/gl_generic/evas_engine.c
+++ b/src/modules/evas/engines/gl_generic/evas_engine.c
@@ -2856,6 +2856,23 @@ eng_ector_begin(void *engine, void *surface,
Ector_Software_Surface_Data *pd = efl_data_scope_get(ector, ECTOR_SOFTWARE_SURFACE_CLASS);
if (!pd) return EINA_FALSE;
+ /* Collectors survive across passes and their Evas_GL_Textures are
+ * overwritten in place by span_collector_upload_textures. If this
+ * surface already ran a pass whose draws are still queued, those
+ * uploads would land in the GL stream ahead of the draw that reads
+ * them, and the earlier pass would sample this pass's spans.
+ * Drain first. In the normal single-pass case eng_ector_end's
+ * target_surface_set has already flushed, so this is a cheap
+ * no-op: evas_gl_common_context_flush stops at the first empty
+ * pipe. */
+ if (pd->span_collectors_fill_count > 0 ||
+ pd->span_collectors_stroke_count > 0)
+ {
+ Evas_Engine_GL_Context *fgc =
+ gl_generic_context_find(engine, EINA_FALSE);
+ if (fgc) evas_gl_common_context_flush(fgc);
+ }
+
/* Reset counts — existing collectors are reused by the alloc cb. */
pd->span_collectors_fill_count = 0;
pd->span_collectors_stroke_count = 0;
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