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Start abstracting the rendering backend away to make it easier to switch to GPU rendering later

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This commit is contained in:
Andrew Kesterson
2026-05-24 21:59:29 -04:00
parent 8f613397d6
commit 6314ad7f26
13 changed files with 159 additions and 82 deletions
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16
src/tilemap.c
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@@ -135,7 +135,7 @@ akerr_ErrorContext *akgl_tilemap_load_tilesets_each(json_t *tileset, akgl_Tilema
} PROCESS(e) {
} FINISH(e, true);
dest->tilesets[tsidx].texture = IMG_LoadTexture(renderer, (char *)&dest->tilesets[tsidx].imagefilename);
dest->tilesets[tsidx].texture = IMG_LoadTexture(renderer.sdl_renderer, (char *)&dest->tilesets[tsidx].imagefilename);
FAIL_ZERO_RETURN(e, dest->tilesets[tsidx].texture, AKERR_NULLPOINTER, "Failed loading tileset image : %s", SDL_GetError());
SUCCEED_RETURN(e);
@@ -372,7 +372,7 @@ akerr_ErrorContext *akgl_tilemap_load_layer_image(akgl_Tilemap *dest, json_t *ro
);
RESTORE_GCC_WARNINGS
dest->layers[layerid].texture = IMG_LoadTexture(renderer, (char *)fpath->data);
dest->layers[layerid].texture = IMG_LoadTexture(renderer.sdl_renderer, (char *)fpath->data);
FAIL_ZERO_BREAK(errctx, dest->layers[layerid].texture, AKGL_ERR_SDL, "%s", SDL_GetError());
dest->layers[layerid].width = dest->layers[layerid].texture->w;
dest->layers[layerid].height = dest->layers[layerid].texture->h;
@@ -500,7 +500,7 @@ akerr_ErrorContext *akgl_tilemap_load(char *fname, akgl_Tilemap *dest)
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext *akgl_tilemap_draw(SDL_Renderer *renderer, akgl_Tilemap *map, SDL_FRect *viewport, int layeridx)
akerr_ErrorContext *akgl_tilemap_draw(akgl_Tilemap *map, SDL_FRect *viewport, int layeridx)
{
PREPARE_ERROR(errctx);
SDL_FRect dest = {.x = 0, .y = 0, .w = 0, .h = 0};;
@@ -556,7 +556,7 @@ akerr_ErrorContext *akgl_tilemap_draw(SDL_Renderer *renderer, akgl_Tilemap *map,
src.h = map->layers[layeridx].height;
dest.w = map->layers[layeridx].width;
dest.h = map->layers[layeridx].height;
SDL_RenderTexture(renderer, map->layers[layeridx].texture, &src, &dest);
PASS(errctx, renderer.draw_texture(&renderer, map->layers[layeridx].texture, &src, &dest, 0, NULL, SDL_FLIP_NONE));
SUCCEED_RETURN(errctx);
}
@@ -611,7 +611,7 @@ akerr_ErrorContext *akgl_tilemap_draw(SDL_Renderer *renderer, akgl_Tilemap *map,
dest.y,
dest.w,
dest.h);*/
SDL_RenderTexture(renderer, map->tilesets[tilesetidx].texture, &src, &dest);
PASS(errctx, renderer.draw_texture(&renderer, map->tilesets[tilesetidx].texture, &src, &dest, 0, NULL, SDL_FLIP_NONE));
}
}
dest.x += map->tilewidth;
@@ -621,14 +621,14 @@ akerr_ErrorContext *akgl_tilemap_draw(SDL_Renderer *renderer, akgl_Tilemap *map,
SUCCEED_RETURN(errctx);
}
akerr_ErrorContext *akgl_tilemap_draw_tileset(SDL_Renderer *renderer, akgl_Tilemap *map, int tilesetidx)
akerr_ErrorContext *akgl_tilemap_draw_tileset(akgl_Tilemap *map, int tilesetidx)
{
PREPARE_ERROR(errctx);
SDL_FRect dest;
SDL_FRect src;
int tilenum = 0;
/*
* Render every tile in a tileset to the given renderer
* Render every tile in a tileset to the default renderer
* (this is a debugging tool that shows that the recorded tile offsets are correct,
* by proving that we can reconstruct the original tileset image)
*/
@@ -666,7 +666,7 @@ akerr_ErrorContext *akgl_tilemap_draw_tileset(SDL_Renderer *renderer, akgl_Tilem
dest.y,
dest.w,
dest.h);*/
SDL_RenderTexture(renderer, map->tilesets[tilesetidx].texture, &src, &dest);
PASS(errctx, renderer.draw_texture(&renderer, map->tilesets[tilesetidx].texture, &src, &dest, 0, NULL, SDL_FLIP_NONE));
}
SUCCEED_RETURN(errctx);
}