SDL: Added color scale info for the GPU renderer TODO item

SDL Commits
1 
From e2254b1045dfa9d164b8baad360a75d3bb89d92a Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Sun, 20 Oct 2024 18:37:21 -0700
Subject: [PATCH] Added color scale info for the GPU renderer TODO item

---
 src/render/gpu/SDL_render_gpu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/render/gpu/SDL_render_gpu.c b/src/render/gpu/SDL_render_gpu.c
index 1ecc0ae97b3f5..c36784ce9e865 100644
--- a/src/render/gpu/SDL_render_gpu.c
+++ b/src/render/gpu/SDL_render_gpu.c
@@ -432,6 +432,7 @@ static bool GPU_QueueGeometry(SDL_Renderer *renderer, SDL_RenderCommand *cmd, SD
         }
 
         // FIXME: The Vulkan backend doesn't multiply by color_scale. GL does. I'm not sure which one is wrong.
+        // ANSWER: The color scale should be applied in linear space when using the scRGB colorspace. This is done in shaders in the Vulkan backend.
         *(verts++) = col_.r * color_scale;
         *(verts++) = col_.g * color_scale;
         *(verts++) = col_.b * color_scale;