From 9ca804040a34b29ec1f067206eae86893a2e7997 Mon Sep 17 00:00:00 2001
From: Akshay Nair <phenax5@gmail.com>
Date: Mon, 31 Aug 2026 01:15:57 +0530
Subject: Compute shader testing

---
 src/main/kotlin/play/PlayShowProgram.kt | 62 ++++++++++++++++++++++-----------
 1 file changed, 41 insertions(+), 21 deletions(-)

(limited to 'src/main/kotlin/play')

diff --git a/src/main/kotlin/play/PlayShowProgram.kt b/src/main/kotlin/play/PlayShowProgram.kt
index 016378f..4107cd7 100644
--- a/src/main/kotlin/play/PlayShowProgram.kt
+++ b/src/main/kotlin/play/PlayShowProgram.kt
@@ -1,12 +1,7 @@
 package play
 
-import kotlin.math.cos
-import kotlin.math.sin
 import org.openrndr.application
-import org.openrndr.color.ColorRGBa
-import org.openrndr.draw.loadFont
-import org.openrndr.draw.loadImage
-import org.openrndr.extra.color.colormatrix.tint
+import org.openrndr.draw.*
 import org.openrndr.extra.olive.oliveProgram
 import phenax.utils.*
 
@@ -20,23 +15,48 @@ fun main() = application {
   }
 
   oliveProgram {
-    val image = loadImage("data/images/pm5544.png")
-    val font = loadFont("data/fonts/default.otf", 64.0)
+    // val image = loadImage("data/images/pm5544.png")
+    // val font = loadFont("data/fonts/default.otf", 64.0)
+
+    val cs = computeStyle {
+      computeTransform =
+              """
+          ivec2 coords = ivec2(gl_GlobalInvocationID.xy);
+          ivec2 resolution = imageSize(p_outputImg).xy;
+          float aspect_ratio = resolution.y*1.0 / resolution.x;
+
+          vec2 uv = vec2(1.0, aspect_ratio) * (coords - 0.5*resolution)/resolution;
+          float dist = length(uv) - 0.1;
+          float step = step(0.0, dist);
+
+          vec4 color = vec4(step, 0.0, 0.0, 1.0);
+          imageStore(p_outputImg, coords, color);
+      """.trimIndent()
+    }
+
+    // val inputBuffer = colorBuffer(width, height, type = ColorType.UINT8)
+
+    val outputBuffer = colorBuffer(width, height, type = ColorType.UINT8)
 
     extend {
-      drawer.drawStyle.colorMatrix = tint(ColorRGBa.WHITE.shade(0.2))
-      drawer.image(image)
-
-      drawer.fill = ColorRGBa.PINK
-      drawer.circle(
-              cos(seconds) * width / 2.0 + width / 2.0,
-              sin(0.5 * seconds) * height / 2.0 + height / 2.0,
-              140.0
-      )
-
-      drawer.fontMap = font
-      drawer.fill = ColorRGBa.WHITE
-      drawer.text("OPENRNDR", width / 2.0, height / 2.0)
+      // drawer.drawStyle.colorMatrix = tint(ColorRGBa.WHITE.shade(0.2))
+      // drawer.image(image)
+
+      // drawer.fill = ColorRGBa.PINK
+      // drawer.circle(
+      //         cos(seconds) * width / 2.0 + width / 2.0,
+      //         sin(0.5 * seconds) * height / 2.0 + height / 2.0,
+      //         140.0
+      // )
+
+      // drawer.fontMap = font
+      // drawer.fill = ColorRGBa.WHITE
+      // drawer.text("OPENRNDR", width / 2.0, height / 2.0)
+
+      cs.parameter("seconds", seconds)
+      cs.image("outputImg", outputBuffer.imageBinding(0, ImageAccess.WRITE))
+      cs.execute(outputBuffer.width, outputBuffer.height, 1)
+      drawer.image(outputBuffer)
     }
   }
 }
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