Built sprite batch

src/engine/display/spritebatch.c

@@ -0,0 +1,59 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "spritebatch.h"
+
+spritebatch_t * spriteBatchCreate(int32_t maxSprites) {
+  spritebatch_t *batch = malloc(sizeof(spritebatch_t));
+  if(batch == NULL) return NULL;
+
+  batch->maxSprites = maxSprites;
+  batch->currentSprite = 0;
+
+  batch->primitive = primitiveCreate(
+    maxSprites*QUAD_VERTICE_COUNT, maxSprites*QUAD_INDICE_COUNT
+  );
+  if(batch == NULL) {
+    free(batch);
+    return NULL;
+  }
+
+  return batch;
+}
+
+void spriteBatchQuad(spritebatch_t *spriteBatch, int32_t index,
+  float x, float y, float width, float height,
+  float u0, float v0, float u1, float v1
+) {
+  if(index == -1) {
+    index = spriteBatch->currentSprite++;
+  } else {
+    spriteBatch->currentSprite = max(index, spriteBatch->currentSprite);
+  }
+  
+  quadBuffer(spriteBatch->primitive,
+    x, y, u0, v0,
+    x+width, y+height, u1, v1,
+    index*QUAD_VERTICE_COUNT, index*QUAD_INDICE_COUNT
+  );
+}
+
+void spriteBatchFlush(spritebatch_t *spriteBatch) {
+  spriteBatch->currentSprite = 0;
+}
+
+void spriteBatchDraw(spritebatch_t *spriteBatch, int32_t index, int32_t count) {
+  if(count == -1) count = spriteBatch->currentSprite;
+  primitiveDraw(spriteBatch->primitive,
+    index*QUAD_INDICE_COUNT, count*QUAD_INDICE_COUNT
+  );
+}
+
+void spriteBatchDispose(spritebatch_t *spriteBatch) {
+  primitiveDispose(spriteBatch);
+  free(spriteBatch);
+}