1 files changed, 53 insertions, 0 deletions
diff --git a/glsl/shader_2d.vert.glsl b/glsl/shader_2d.vert.glsl
new file mode 100644
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+++ b/glsl/shader_2d.vert.glsl
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2022 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#version 450
+#extension GL_ARB_separate_shader_objects : enable
+
+layout(location = 0) in vec2 in_texture_coord;
+
+layout(location = 0) out vec2 out_texture_coord;
+
+layout(set = 0, binding = 0) uniform UBOSpritePositions
+{
+  vec4 positions[128];
+} ubo_sprite_positions;
+
+void
+main()
+{
+  vec2 coordinate;
+  vec4 position = ubo_sprite_positions.positions[gl_InstanceIndex];
+
+  out_texture_coord = in_texture_coord;
+
+  switch(gl_VertexIndex)
+  {
+  case 0:
+    coordinate = vec2(position.x, position.y);
+    break;
+  case 1:
+    coordinate = vec2(position.x, position.w);
+    break;
+  case 2:
+    coordinate = vec2(position.z, position.y);
+    break;
+  case 3:
+    coordinate = vec2(position.z, position.w);
+    break;
+  }
+  gl_Position = vec4(coordinate, 0.0, 1.0);
+}