archivemuh

archive/dusksdl2/display/spritebatch/spritebatch.c

@@ -0,0 +1,75 @@
+/**
+ * Copyright (c) 2025 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "spritebatch.h"
+#include "assert/assert.h"
+#include "util/memory.h"
+#include "console/console.h"
+
+spritebatch_t SPRITEBATCH;
+
+void spriteBatchInit() {
+  SPRITEBATCH.spriteCount = 0;
+  SPRITEBATCH.currentTexture = NULL;
+  
+  meshInit(
+    &SPRITEBATCH.mesh,
+    GL_TRIANGLES,
+    SPRITEBATCH_VERTEX_COUNT,
+    &SPRITEBATCH.vertices[0]
+  );
+}
+
+void spriteBatchPush(
+  texture_t *texture,
+  const float_t minX,
+  const float_t minY,
+  const float_t maxX,
+  const float_t maxY,
+  const uint8_t r,
+  const uint8_t g,
+  const uint8_t b,
+  const uint8_t a,
+  const float_t u0,
+  const float_t v0,
+  const float_t u1,
+  const float_t v1
+) {
+  // Need to flush?
+  if(
+    SPRITEBATCH.currentTexture != texture ||
+    SPRITEBATCH.spriteCount >= SPRITEBATCH_SPRITES_MAX
+  ) {
+    spriteBatchFlush();
+    SPRITEBATCH.currentTexture = texture;
+  }
+
+  quadBuffer(
+    &SPRITEBATCH.vertices[SPRITEBATCH.spriteCount * QUAD_VERTEX_COUNT],
+    minX, minY, maxX, maxY,
+    r, g, b, a,
+    u0, v0, u1, v1
+  );
+
+  SPRITEBATCH.spriteCount++;
+}
+
+void spriteBatchClear() {
+  SPRITEBATCH.spriteCount = 0;
+  SPRITEBATCH.currentTexture = NULL;
+}
+
+void spriteBatchFlush() {
+  if(SPRITEBATCH.spriteCount == 0) return;
+  textureBind(SPRITEBATCH.currentTexture);
+  meshDraw(&SPRITEBATCH.mesh, 0, QUAD_VERTEX_COUNT * SPRITEBATCH.spriteCount);
+  spriteBatchClear();
+}
+
+void spriteBatchDispose() {
+  meshDispose(&SPRITEBATCH.mesh);
+}