refa Use Push constants for sprites and rectangles

1 files changed, 57 insertions, 0 deletions

diff --git a/glsl/shader_2d_solid.vert.glsl b/glsl/shader_2d_solid.vert.glsl
new file mode 100644
index 0000000..bf0e237
--- /dev/null
+++ b/glsl/shader_2d_solid.vert.glsl
@@ -0,0 +1,57 @@
+/*
+ * 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 UBOView2D
+{
+  mat4 proj;
+} ubo_view;
+
+layout(push_constant) uniform PCSprite
+{
+  vec4 position;
+} sprite;
+
+void
+main()
+{
+  vec2 coordinate;
+
+  out_texture_coord = in_texture_coord;
+
+  switch(gl_VertexIndex)
+  {
+  case 0:
+    coordinate = vec2(sprite.position.x, sprite.position.y);
+    break;
+  case 1:
+    coordinate = vec2(sprite.position.x, sprite.position.w);
+    break;
+  case 2:
+    coordinate = vec2(sprite.position.z, sprite.position.y);
+    break;
+  case 3:
+    coordinate = vec2(sprite.position.z, sprite.position.w);
+    break;
+  }
+  gl_Position = ubo_view.proj * vec4(coordinate, 0.0, 1.0);
+}