From 4ab1d8922b54fe2945dcdb6b3272c52c71f28957 Mon Sep 17 00:00:00 2001
From: Cristobal Sciutto <cristobal.sciutto@gmail.com>
Date: Fri, 27 Oct 2023 18:00:12 -0400
Subject: scale as param

---
 virtual-programs/display/image.folk | 8 ++++----
 virtual-programs/images.folk        | 8 ++++++--
 2 files changed, 10 insertions(+), 6 deletions(-)

(limited to 'virtual-programs')

diff --git a/virtual-programs/display/image.folk b/virtual-programs/display/image.folk
index 23246d45..55a283e0 100644
--- a/virtual-programs/display/image.folk
+++ b/virtual-programs/display/image.folk
@@ -5,10 +5,10 @@ On process "display" {
     dict set ::pipelines "image" [Gpu::pipeline {sampler2D image vec2 imageSize
                               vec2 pos float radians float scale
                               fn rotate} {
-        vec2 a = pos + rotate(-imageSize/2, -radians);
-        vec2 b = pos + rotate(vec2(imageSize.x, -imageSize.y)/2, -radians);
-        vec2 c = pos + rotate(imageSize/2, -radians);
-        vec2 d = pos + rotate(vec2(-imageSize.x, imageSize.y)/2, -radians);
+        vec2 a = scale * (pos + rotate(-imageSize/2, -radians));
+        vec2 b = scale * (pos + rotate(vec2(imageSize.x, -imageSize.y)/2, -radians));
+        vec2 c = scale * (pos + rotate(imageSize/2, -radians));
+        vec2 d = scale * (pos + rotate(vec2(-imageSize.x, imageSize.y)/2, -radians));
         vec2 vertices[4] = vec2[4](a, b, d, c);
         return vertices[gl_VertexIndex];
     } {fn invBilinear fn rotate} {
diff --git a/virtual-programs/images.folk b/virtual-programs/images.folk
index d8bcaf55..1be51424 100644
--- a/virtual-programs/images.folk
+++ b/virtual-programs/images.folk
@@ -343,7 +343,7 @@ When /someone/ wishes /p/ displays camera slice /slice/ & /p/ has region /r/ {
     Wish to draw an image with center $center image $slice radians 0 scale 1
 }
 
-When /someone/ wishes /p/ displays image /im/ {
+When /someone/ wishes /p/ displays image /im/ with scale /s/ {
     set im [image load $im]
     When $p has region /r/ {
         # Compute a scale for im that will fit in the region width/height
@@ -354,10 +354,14 @@ When /someone/ wishes /p/ displays image /im/ {
         # set scale [expr {min($width / [image width $im],
         #                      $height / [image height $im])}]
         # Wish $p is labelled $im
-        Wish to draw an image with center $center image $im radians [region angle $r]
+        Wish to draw an image with center $center image $im radians [region angle $r] scale $s
     }
     # On unmatch {
     #     # HACK: Leaves time for the display to finish trying to display this.
     #     after 5000 [list image freeJpeg $im]
     # }
 }
+
+When /someone/ wishes /p/ displays image /im/ {
+    Wish $p displays image $im with scale 1
+}
-- 
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