1 files changed, 40 insertions, 0 deletions
diff --git a/include/kitchensink/internal/subtitle/kitatlas.h b/include/kitchensink/internal/subtitle/kitatlas.h
new file mode 100644
index 0000000..2058f65
--- /dev/null
+++ b/include/kitchensink/internal/subtitle/kitatlas.h
@@ -0,0 +1,40 @@
+#ifndef KITATLAS_H
+#define KITATLAS_H
+
+#include <stdbool.h>
+#include <SDL2/SDL_rect.h>
+#include <SDL2/SDL_surface.h>
+#include <SDL2/SDL_render.h>
+
+#include "kitchensink/kitconfig.h"
+
+#define MAX_SHELVES 256
+
+typedef struct Kit_TextureAtlasItem {
+    int cur_shelf; //< Current shelf number in cache
+    int cur_slot; //< Current slot on shelf in cache
+    bool is_copied; //< Is copied to cache surface
+    SDL_Rect source; //< Source coordinates on cache surface
+    SDL_Rect target; //< Target coordinates on output surface
+    SDL_Surface *surface; //< Current item surface
+} Kit_TextureAtlasItem;
+
+typedef struct Kit_TextureAtlas {
+    int cur_items; //< Current items count
+    int max_items; //< Maximum items count
+    int w; //< Current atlas width
+    int h; //< Current atlas height
+    Kit_TextureAtlasItem *items; //< Cached items
+    uint16_t shelf[MAX_SHELVES][3]; //< Atlas current shelf width, height, item count
+} Kit_TextureAtlas;
+
+KIT_LOCAL Kit_TextureAtlas* Kit_CreateAtlas(int w, int h);
+KIT_LOCAL void Kit_FreeAtlas(Kit_TextureAtlas *atlas);
+KIT_LOCAL void Kit_RefreshAtlas(Kit_TextureAtlas *atlas, double current_pts);
+KIT_LOCAL void Kit_ClearAtlasContent(Kit_TextureAtlas *atlas);
+KIT_LOCAL int Kit_UpdateAtlasTexture(Kit_TextureAtlas *atlas, SDL_Texture *texture);
+KIT_LOCAL int Kit_GetAtlasItems(const Kit_TextureAtlas *atlas, SDL_Rect *sources, SDL_Rect *targets, int limit);
+KIT_LOCAL int Kit_AddAtlasItem(Kit_TextureAtlas *atlas, SDL_Surface *surface, SDL_Rect *target);
+KIT_LOCAL void Kit_FreeAtlasItem(Kit_TextureAtlas *atlas, int item_id);
+
+#endif // KITATLAS_H