first commit

source/sprite.c

@@ -0,0 +1,93 @@
+#include "sprite.h"
+
+#include <tonc.h>
+#include <stdlib.h>
+
+#define MAX_SPRITES 128
+#define MAX_AFFINES 32
+
+OBJ_ATTR obj_buffer[MAX_SPRITES];
+OBJ_AFFINE *obj_aff_buffer = (OBJ_AFFINE*)obj_buffer;
+
+static Sprite *free_sprites[MAX_SPRITES] = {NULL};
+static bool free_affines[MAX_AFFINES] = {false};
+
+// Sprite methods
+Sprite *sprite_new(u16 a0, u16 a1, u32 tid, u32 pb, int sprite_index)
+{
+    Sprite *sprite = malloc(sizeof(Sprite));
+
+    sprite->obj = NULL;
+    sprite->aff = NULL;
+
+    if(!free_sprites[sprite_index])
+    {
+        free_sprites[sprite_index] = sprite;
+    }
+    else
+    {
+        free(sprite);
+        return NULL;
+    }
+
+    if (a0 & ATTR0_AFF)
+    {
+        int aff_index = MAX_AFFINES;
+
+        for(int i = 0; i < MAX_AFFINES; i++)
+        {
+            if(!free_affines[i])
+            {
+                free_affines[i] = true;
+                aff_index = i;
+                break;
+            }
+        }
+
+        if (aff_index == MAX_AFFINES)
+        {
+            free(sprite);
+            return NULL;
+        }
+
+        a1 = a1 | ATTR1_AFF_ID(aff_index);
+
+        sprite->obj = &obj_buffer[sprite_index];
+        sprite->aff = &obj_aff_buffer[aff_index];
+        obj_set_attr(sprite->obj, a0, a1, ATTR2_PALBANK(pb) | tid);
+        obj_aff_identity(&obj_aff_buffer[aff_index]);
+        return sprite;
+    }
+    else
+    {
+        sprite->obj = &obj_buffer[sprite_index];
+        obj_set_attr(sprite->obj, a0, a1, ATTR2_PALBANK(pb) | tid);
+        return sprite;
+    }
+}
+
+void sprite_destroy(Sprite **sprite)
+{
+    if (*sprite == NULL) return;
+    obj_hide((*sprite)->obj);
+    free_sprites[(*sprite)->obj - obj_buffer] = NULL;
+    if ((*sprite)->aff != NULL)
+    {
+        free_affines[(*sprite)->aff - obj_aff_buffer] = false;
+    }
+    free(*sprite);
+    *sprite = NULL;
+}
+
+// Sprite functions
+void sprite_init()
+{
+    oam_init(obj_buffer, MAX_SPRITES); 
+}
+
+void sprite_draw()
+{
+    obj_copy(obj_mem, obj_buffer, MAX_SPRITES);
+    obj_aff_copy(obj_aff_mem, obj_aff_buffer, MAX_AFFINES);
+    oam_copy(oam_mem, obj_buffer, MAX_SPRITES);
+}