From 8f924a1d462f50240ca2143492c72fd3bca2e467 Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Wed, 23 Jan 2019 18:49:33 -0500
Subject: sprites.c: add comments
---
src/sdl/sprites.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/src/sdl/sprites.c b/src/sdl/sprites.c
index 4f3360d..6fe8df0 100644
--- a/src/sdl/sprites.c
+++ b/src/sdl/sprites.c
@@ -18,17 +18,18 @@ sprite_set_init(
const asset_id_t asset_id
) {
sprite_set_t set;
+
// get asset
const asset_t * const asset = asset_get(asset_id);
- // load image
+ // load backing image data
int im_w, im_h;
set.im_data = stbi_load_from_memory(asset->buf, asset->len, &im_w, &im_h, NULL, 4);
if (!set.im_data) {
die("stbi_load(): %s", stbi_failure_reason());
}
- // create surface
+ // create surface from backing image data
set.surface = SDL_CreateRGBSurfaceWithFormatFrom(set.im_data, im_w, im_h, 32, 4 * im_w, SDL_PIXELFORMAT_RGBA32);
if (!set.surface) {
die("SDLCreateRGBSurfaceFrom(): %s", SDL_GetError());
@@ -45,7 +46,7 @@ sprite_set_fini(
// free main surface
SDL_FreeSurface(set->surface);
- // free image data
+ // free backing image data
stbi_image_free(set->im_data);
}
--
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