shithub: choc

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VGA Porch border emulation

Set the renderer draw colour to the current palette's 0-index,
rather than just black. This means the pillars/letterboxes "flash"
when the palette changes (such as item pick up, being hurt, etc.)

This emulates the behaviour of the VGA "porch" region with Vanilla.

Fixes #832.

--- a/src/i_video.c

+++ b/src/i_video.c

@@ -740,6 +740,10 @@

     if (palette_to_set)

     {

         SDL_SetPaletteColors(screenbuffer->format->palette, palette, 0, 256);

+        // "flash" the pillars/letterboxes with palette changes, emulating

+        // VGA "porch" behaviour (GitHub issue #832)

+        SDL_SetRenderDrawColor(renderer, palette[0].r, palette[0].g,

+            palette[0].b, SDL_ALPHA_OPAQUE);

         palette_to_set = false;

     }