From 90ae5cdba22681488f2cb638e8abedaebbd29be1 Mon Sep 17 00:00:00 2001
From: Jonathan Bradley <jcb@pikum.xyz>
Date: Tue, 15 Aug 2023 17:01:01 -0400
Subject: add shaders

---
 assets/shaders/present.frag | 16 ++++++++++++++++
 assets/shaders/present.vert | 14 ++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 assets/shaders/present.frag
 create mode 100644 assets/shaders/present.vert

(limited to 'assets')

diff --git a/assets/shaders/present.frag b/assets/shaders/present.frag
new file mode 100644
index 0000000..695f7bd
--- /dev/null
+++ b/assets/shaders/present.frag
@@ -0,0 +1,16 @@
+#version 450
+
+layout (binding = 0) uniform sampler2D samplerColor;
+
+layout (location = 0) in vec2 inUV;
+
+layout (location = 0) out vec4 outFragColor;
+
+void main()
+{
+  vec4 color = texture(samplerColor, inUV);
+  if (color.w == 0) {
+    discard;
+  }
+  outFragColor = color;
+}
\ No newline at end of file
diff --git a/assets/shaders/present.vert b/assets/shaders/present.vert
new file mode 100644
index 0000000..5423fcf
--- /dev/null
+++ b/assets/shaders/present.vert
@@ -0,0 +1,14 @@
+#version 450
+
+layout (location = 0) out vec2 outUV;
+
+out gl_PerVertex
+{
+  vec4 gl_Position;
+};
+
+void main() 
+{
+  outUV = vec2((gl_VertexIndex << 1) & 2, gl_VertexIndex & 2);
+  gl_Position = vec4(outUV * 2.0f - 1.0f, 0.0f, 1.0f);
+}
\ No newline at end of file
-- 
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