From 0b33b2cf9ceadb30da6f9eea7ba196f3f4b9e37a Mon Sep 17 00:00:00 2001
From: hizzlekizzle <hizzlekizzle@users.noreply.github.com>
Date: Tue, 18 Apr 2023 08:27:18 -0500
Subject: [PATCH] add img-flip param to metaCRT

for use with hardware-rendered cores
---
 crt/shaders/metacrt/Image.slang | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/crt/shaders/metacrt/Image.slang b/crt/shaders/metacrt/Image.slang
index fed304d..1e6a031 100644
--- a/crt/shaders/metacrt/Image.slang
+++ b/crt/shaders/metacrt/Image.slang
@@ -6,6 +6,7 @@ layout(push_constant) uniform Push
 	vec4 OriginalSize;
 	vec4 OutputSize;
 	uint FrameCount;
+	float flip_image;
 } params;
 
 #define vFragCoord vTexCoord.xy * params.OutputSize.xy
@@ -18,6 +19,8 @@ layout(push_constant) uniform Push
 #define vFragColor FragColor
 #define fragColor FragColor
 
+#pragma parameter flip_image "Flip Image (for hardware-rendered cores)" 0.0 0.0 1.0 1.0
+
 layout(std140, set = 0, binding = 0) uniform UBO
 {
 	mat4 MVP;
@@ -31,7 +34,7 @@ layout(location = 0) out vec2 vTexCoord;
 void main()
 {
    gl_Position = global.MVP * Position;
-   vTexCoord = TexCoord;
+   vTexCoord = (bool(params.flip_image)) ? vec2(TexCoord.x, 1.0 - TexCoord.y) : TexCoord.xy;
 }
 
 #pragma stage fragment
@@ -385,4 +388,4 @@ void main()
     
     fragColor.rgb = Tonemap( fragColor.rgb );
     fragColor.a = 1.0;
-}
\ No newline at end of file
+}