[orx-shade-styles] Add ImageFit shade style

orx-shade-styles/build.gradle.kts

@@ -35,6 +35,9 @@ kotlin {
         val jvmDemo by getting {
             dependencies {
                 implementation(project(":orx-color"))
+                implementation(project(":orx-shade-styles"))
+                implementation(project(":orx-noise"))
+                implementation(project(":orx-shapes"))
             }
         }
     }

orx-shade-styles/src/commonMain/kotlin/ImageFit.kt

@@ -0,0 +1,61 @@
+package org.openrndr.extra.shadestyles
+
+import org.openrndr.draw.ColorBuffer
+import org.openrndr.draw.ShadeStyle
+import org.openrndr.math.Vector2
+
+class ImageFit : ShadeStyle() {
+
+    var image: ColorBuffer by Parameter()
+    var flipV: Boolean by Parameter()
+    var position: Vector2 by Parameter()
+
+    init {
+        position = Vector2.ZERO
+        fragmentTransform = """
+    | vec2 uv = c_boundsPosition.xy;
+    | vec2 ts = textureSize(p_image, 0);
+    | float boundsAR = c_boundsSize.x / c_boundsSize.y;
+    | vec2 shift = (p_position + vec2(1.0, 1.0)) / 2.0;
+    | 
+    | if (c_boundsSize.x > c_boundsSize.y) {
+    |   uv.y -= shift.y; 
+    |   uv.y /= boundsAR;
+    |   uv.y += shift.y;
+    | } else {
+    |   uv.x -= shift.x;
+    |   uv.x *= boundsAR;
+    |   uv.x += shift.x;
+    | }
+    | float textureAR = ts.x / ts.y;
+    | if (ts.x > ts.y) {
+    |   uv.x -= 0.5;
+    |   uv.x /= textureAR;
+    |   uv.x += 0.5;
+    | } else {
+    |   uv.y -= 0.5;
+    |   uv.y *= textureAR;
+    |   uv.y += 0.5;
+    | }
+    | 
+    | 
+    | if (p_flipV) {
+    |   uv.y = 1.0 - uv.y;
+    | }
+    | #ifndef OR_GL_TEXTURE2D
+    | vec4 img = texture(p_image, uv);
+    | #else
+    | vec4 img = texture2D(p_image, uv);
+    | #endif
+    | x_fill = img;
+    | """.trimMargin()
+    }
+}
+
+fun imageFit(image: ColorBuffer, position: Vector2 = Vector2.ZERO) : ImageFit {
+    val im = ImageFit()
+    im.image = image
+    im.flipV = true
+    im.position = position
+    return im
+}

orx-shade-styles/src/demo/kotlin/DemoImageFit01.kt

@@ -0,0 +1,23 @@
+import org.openrndr.application
+import org.openrndr.color.ColorRGBa
+import org.openrndr.draw.loadImage
+import org.openrndr.extra.shadestyles.imageFit
+import org.openrndr.extra.shadestyles.linearGradient
+import org.openrndr.math.Vector2
+import org.openrndr.shape.Circle
+import kotlin.math.cos
+import kotlin.math.sin
+
+fun main() = application {
+    program {
+        val image = loadImage("demo-data/images/image-001.png")
+        extend {
+            drawer.shadeStyle = imageFit(image, Vector2(cos(seconds), sin(seconds))) + linearGradient(ColorRGBa.RED, ColorRGBa.BLUE)
+            drawer.circle(drawer.bounds.center, 200.0)
+            drawer.rectangle(10.0, 10.0, 400.0, 50.0)
+            drawer.rectangle(10.0, 10.0, 50.0, 400.0)
+            drawer.contour(Circle(width/2.0, height/2.0, 50.0).contour)
+        }
+    }
+}
+