From f7d3abddba774b775d6285e1dfb131a578900549 Mon Sep 17 00:00:00 2001
From: Sylvain <[EMAIL REDACTED]>
Date: Sat, 29 Jan 2022 10:19:08 +0100
Subject: [PATCH] Fixed bug #964 - SDL_RenderCopy stretch loses proportion on
viewport. Handle the case when there is blending
---
src/render/software/SDL_render_sw.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/src/render/software/SDL_render_sw.c b/src/render/software/SDL_render_sw.c
index 5afa4fa440e..b44d523331f 100644
--- a/src/render/software/SDL_render_sw.c
+++ b/src/render/software/SDL_render_sw.c
@@ -829,13 +829,31 @@ SW_RunCommandQueue(SDL_Renderer * renderer, SDL_RenderCommand *cmd, void *vertic
/* Scale to an intermediate surface, then blit */
if (tmp) {
SDL_Rect r;
+ SDL_BlendMode blendmode;
+ Uint8 alphaMod, rMod, gMod, bMod;
+
+ SDL_GetSurfaceBlendMode(src, &blendmode);
+ SDL_GetSurfaceAlphaMod(src, &alphaMod);
+ SDL_GetSurfaceColorMod(src, &rMod, &gMod, &bMod);
+
r.x = 0;
r.y = 0;
r.w = dstrect->w;
r.h = dstrect->h;
+
+ SDL_SetSurfaceBlendMode(src, SDL_BLENDMODE_NONE);
+ SDL_SetSurfaceColorMod(src, 255, 255, 255);
+ SDL_SetSurfaceAlphaMod(src, 255);
+
SDL_PrivateUpperBlitScaled(src, srcrect, tmp, &r, texture->scaleMode);
+
+ SDL_SetSurfaceColorMod(tmp, rMod, gMod, bMod);
+ SDL_SetSurfaceAlphaMod(tmp, alphaMod);
+ SDL_SetSurfaceBlendMode(tmp, blendmode);
+
SDL_BlitSurface(tmp, NULL, surface, dstrect);
SDL_FreeSurface(tmp);
+ /* No need to set back r/g/b/a/blendmode to 'src' since it's done in PrepTextureForCopy() */
}
} else{
SDL_PrivateUpperBlitScaled(src, srcrect, surface, dstrect, texture->scaleMode);