prog

2026-06-18 20:25:54 -05:00
parent 730a5b2b10
commit 57b2cdb9d1
111 changed files with 865 additions and 3328 deletions
@@ -0,0 +1,179 @@
+/**
+ * Copyright (c) 2026 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 "util/math.h"
+#include "display/shader/shadermaterial.h"
+
+meshvertex_t SPRITEBATCH_VERTICES[SPRITEBATCH_VERTEX_COUNT];
+spritebatch_t SPRITEBATCH;
+
+errorret_t spriteBatchInit() {
+  memoryZero(&SPRITEBATCH, sizeof(spritebatch_t));
+  errorChain(meshInit(
+    &SPRITEBATCH.mesh,
+    QUAD_PRIMITIVE_TYPE,
+    SPRITEBATCH_VERTEX_COUNT,
+    SPRITEBATCH_VERTICES
+  ));
+  errorOk();
+}
+
+errorret_t spriteBatchBuffer(
+  const spritebatchsprite_t *sprites,
+  const uint32_t count,
+  shader_t *shader,
+  const shadermaterial_t material
+) {
+  assertNotNull(sprites, "Sprites cannot be null");
+  assertTrue(count > 0, "Count must be greater than zero");
+  assertNotNull(shader, "Shader cannot be null");
+
+  // Did the shader or material data change?
+  if(shader != SPRITEBATCH.shader) {
+    errorChain(spriteBatchFlush());
+    SPRITEBATCH.shader = shader;
+    SPRITEBATCH.material = material;
+  } else if(memoryCompare(
+    &material, &SPRITEBATCH.material, sizeof(shadermaterial_t)
+  ) != 0) {
+    // Did the material data change?
+    errorChain(spriteBatchFlush());
+    SPRITEBATCH.shader = shader;
+    SPRITEBATCH.material = material;
+  }
+
+  // Buffer the vertices.
+  uint32_t remaining = count;
+  do {
+    uint32_t spritesBeforeFlush = (
+      SPRITEBATCH_SPRITES_MAX_PER_FLUSH - SPRITEBATCH.spriteCount
+    );
+
+    if(spritesBeforeFlush == 0) {
+      // Flush if we have no capacity before flushing.
+      errorChain(spriteBatchFlush());
+      spritesBeforeFlush = SPRITEBATCH_SPRITES_MAX_PER_FLUSH;
+    }
+
+    // Many we buffering?
+    const uint32_t batchCount = mathMin(
+      remaining,
+      spritesBeforeFlush
+    );
+
+    // Destination
+    meshvertex_t *v = &SPRITEBATCH_VERTICES[
+      (SPRITEBATCH.spriteCount + (SPRITEBATCH.spriteFlush *
+      SPRITEBATCH_SPRITES_MAX_PER_FLUSH)) * QUAD_VERTEX_COUNT
+    ];
+
+    // Buffer to the mesh vertices.
+    spriteBatchBufferToMesh(
+      sprites, batchCount, v, batchCount * QUAD_VERTEX_COUNT
+    );
+    SPRITEBATCH.spriteCount += batchCount;
+    remaining -= batchCount;
+  } while(remaining > 0);
+  
+  errorOk();
+}
+
+void spriteBatchBufferToMesh(
+  const spritebatchsprite_t *sprites,
+  const uint32_t count,
+  meshvertex_t *vertices,
+  const uint32_t verticesSize
+) {
+  assertNotNull(sprites, "Sprites cannot be null");
+  assertTrue(count > 0, "Count must be greater than zero");
+  assertNotNull(vertices, "Vertices cannot be null");
+  assertTrue(
+    verticesSize >= count * QUAD_VERTEX_COUNT, "Vertices array too small"
+  );
+  
+  for(uint32_t i = 0; i < count; i++ ){
+    spritebatchsprite_t sprite = sprites[i];
+    meshvertex_t *v = &vertices[i * QUAD_VERTEX_COUNT];
+    
+    // Buffer the quad
+    v[0].pos[0] = sprite.min[0];
+    v[0].pos[1] = sprite.min[1];
+    v[0].pos[2] = sprite.min[2];
+    v[0].uv[0] = sprite.uvMin[0];
+    v[0].uv[1] = sprite.uvMin[1];
+
+    v[1].pos[0] = sprite.max[0];
+    v[1].pos[1] = sprite.min[1];
+    v[1].pos[2] = sprite.min[2];
+    v[1].uv[0] = sprite.uvMax[0];
+    v[1].uv[1] = sprite.uvMin[1];
+
+    v[2].pos[0] = sprite.max[0];
+    v[2].pos[1] = sprite.max[1];
+    v[2].pos[2] = sprite.max[2];
+    v[2].uv[0] = sprite.uvMax[0];
+    v[2].uv[1] = sprite.uvMax[1];
+
+    v[3].pos[0] = sprite.min[0];
+    v[3].pos[1] = sprite.min[1];
+    v[3].pos[2] = sprite.min[2];
+    v[3].uv[0] = sprite.uvMin[0];
+    v[3].uv[1] = sprite.uvMin[1];
+
+    v[4].pos[0] = sprite.max[0];
+    v[4].pos[1] = sprite.max[1];
+    v[4].pos[2] = sprite.max[2];
+    v[4].uv[0] = sprite.uvMax[0];
+    v[4].uv[1] = sprite.uvMax[1];
+
+    v[5].pos[0] = sprite.min[0];
+    v[5].pos[1] = sprite.max[1];
+    v[5].pos[2] = sprite.max[2];
+    v[5].uv[0] = sprite.uvMin[0];
+    v[5].uv[1] = sprite.uvMax[1];
+  }
+}
+
+void spriteBatchClear() {
+  SPRITEBATCH.spriteCount = 0;
+  SPRITEBATCH.spriteFlush = 0;
+  SPRITEBATCH.shader = NULL;
+  memoryZero(&SPRITEBATCH.material, sizeof(shadermaterial_t));
+}
+
+errorret_t spriteBatchFlush() {
+  if(SPRITEBATCH.spriteCount == 0) {
+    errorOk();
+  }
+
+  size_t vertexCount = QUAD_VERTEX_COUNT * SPRITEBATCH.spriteCount;
+  size_t vertexOffset = (
+    SPRITEBATCH.spriteFlush * SPRITEBATCH_SPRITES_MAX_PER_FLUSH *
+    QUAD_VERTEX_COUNT
+  );
+
+  errorChain(shaderBind(SPRITEBATCH.shader));
+  errorChain(shaderSetMaterial(SPRITEBATCH.shader, &SPRITEBATCH.material));
+  errorChain(meshFlush(&SPRITEBATCH.mesh, vertexOffset, vertexCount));
+  errorChain(meshDraw(&SPRITEBATCH.mesh, vertexOffset, vertexCount));
+
+  SPRITEBATCH.spriteFlush++;
+  if(SPRITEBATCH.spriteFlush >= SPRITEBATCH_FLUSH_COUNT) {
+    SPRITEBATCH.spriteFlush = 0;
+  }
+  SPRITEBATCH.spriteCount = 0;
+
+  errorOk();
+}
+
+errorret_t spriteBatchDispose() {
+  errorChain(meshDispose(&SPRITEBATCH.mesh));
+  errorOk();
+}