From 6cebd826920f2a8164e759bbc02eab67fb2dc1b2 Mon Sep 17 00:00:00 2001
From: Jaakko Keränen <jaakko.keranen@iki.fi>
Date: Wed, 31 Mar 2021 09:16:13 +0300
Subject: Text: Preserve alpha when caching glyphs

Ensure no blending is done. Glyphs are supposed to be cached as-is.
---
 src/ui/text.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src')

diff --git a/src/ui/text.c b/src/ui/text.c
index 325a201f..674e2a72 100644
--- a/src/ui/text.c
+++ b/src/ui/text.c
@@ -481,10 +481,12 @@ static SDL_Surface *rasterizeGlyph_Font_(const iFont *d, uint32_t glyphIndex, fl
         &d->font, d->xScale, d->yScale, xShift, 0.0f, glyphIndex, &w, &h, 0, 0);
     SDL_Surface *surface8 =
         SDL_CreateRGBSurfaceWithFormatFrom(bmp, w, h, 8, w, SDL_PIXELFORMAT_INDEX8);
+    SDL_SetSurfaceBlendMode(surface8, SDL_BLENDMODE_NONE);
     SDL_SetSurfacePalette(surface8, text_.grayscale);
 #if LAGRANGE_RASTER_DEPTH != 8
     /* Convert to the cache format. */
     SDL_Surface *surf = SDL_ConvertSurfaceFormat(surface8, LAGRANGE_RASTER_FORMAT, 0);
+    SDL_SetSurfaceBlendMode(surf, SDL_BLENDMODE_NONE);
     free(bmp);
     SDL_FreeSurface(surface8);
     return surf;
@@ -728,6 +730,7 @@ void cacheTextGlyphs_Font_(iFont *d, const iRangecc text) {
                                 0, bufSize.x, bufSize.y,
                                 LAGRANGE_RASTER_DEPTH,
                                 LAGRANGE_RASTER_FORMAT);
+                    SDL_SetSurfaceBlendMode(buf, SDL_BLENDMODE_NONE);
                     SDL_SetSurfacePalette(buf, text_.grayscale);
                 }
                 SDL_Surface *surfaces[2] = {
-- 
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