From 4a7d5e667d2bdc8a0d5e4bf4c61a820eb08ae230 Mon Sep 17 00:00:00 2001
From: Victoria Brekenfeld <github@drakulix.de>
Date: Thu, 23 Jan 2025 15:22:27 +0100
Subject: [PATCH] gles/element: Take `src` into account

---
 src/backend/renderer/gles/element.rs |  8 ++++----
 src/backend/renderer/gles/mod.rs     | 12 +++++-------
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/src/backend/renderer/gles/element.rs b/src/backend/renderer/gles/element.rs
index 6d16fea50c02..d7db1661cffa 100644
--- a/src/backend/renderer/gles/element.rs
+++ b/src/backend/renderer/gles/element.rs
@@ -80,9 +80,7 @@ impl Element for PixelShaderElement {
     }
 
     fn src(&self) -> Rectangle<f64, Buffer> {
-        self.area
-            .to_f64()
-            .to_buffer(1.0, Transform::Normal, &self.area.size.to_f64())
+        Rectangle::from_size(self.area.size.to_f64().to_buffer(1.0, Transform::Normal))
     }
 
     fn geometry(&self, scale: Scale<f64>) -> Rectangle<i32, Physical> {
@@ -110,14 +108,16 @@ impl RenderElement<GlesRenderer> for PixelShaderElement {
     fn draw(
         &self,
         frame: &mut GlesFrame<'_>,
-        _src: Rectangle<f64, Buffer>,
+        src: Rectangle<f64, Buffer>,
         dst: Rectangle<i32, Physical>,
         damage: &[Rectangle<i32, Physical>],
         _opaque_regions: &[Rectangle<i32, Physical>],
     ) -> Result<(), GlesError> {
         frame.render_pixel_shader_to(
             &self.shader,
+            src,
             dst,
+            self.area.size.to_buffer(1, Transform::Normal),
             Some(damage),
             self.alpha,
             &self.additional_uniforms,
diff --git a/src/backend/renderer/gles/mod.rs b/src/backend/renderer/gles/mod.rs
index fdf4e6e8d76e..abbf1f486726 100644
--- a/src/backend/renderer/gles/mod.rs
+++ b/src/backend/renderer/gles/mod.rs
@@ -2753,10 +2753,13 @@ impl GlesFrame<'_> {
 
     /// Render a pixel shader into the current target at a given `dest`-region.
     #[profiling::function]
+    #[allow(clippy::too_many_arguments)]
     pub fn render_pixel_shader_to(
         &mut self,
         pixel_shader: &GlesPixelProgram,
+        src: Rectangle<f64, BufferCoord>,
         dest: Rectangle<i32, Physical>,
+        size: Size<i32, BufferCoord>,
         damage: Option<&[Rectangle<i32, Physical>]>,
         alpha: f32,
         additional_uniforms: &[Uniform<'_>],
@@ -2810,15 +2813,10 @@ impl GlesFrame<'_> {
         }
 
         let mut matrix = Matrix3::<f32>::identity();
-        let mut tex_matrix = Matrix3::<f32>::identity();
+        let tex_matrix = build_texture_mat(src, dest, size, Transform::Normal);
 
         // dest position and scale
         matrix = matrix * Matrix3::from_translation(Vector2::new(dest.loc.x as f32, dest.loc.y as f32));
-        tex_matrix = tex_matrix
-            * Matrix3::from_nonuniform_scale(
-                (1.0f64 / dest.size.w as f64) as f32,
-                (1.0f64 / dest.size.h as f64) as f32,
-            );
 
         //apply output transformation
         matrix = self.current_projection * matrix;
@@ -2836,7 +2834,7 @@ impl GlesFrame<'_> {
 
             gl.UniformMatrix3fv(program.uniform_matrix, 1, ffi::FALSE, matrix.as_ptr());
             gl.UniformMatrix3fv(program.uniform_tex_matrix, 1, ffi::FALSE, tex_matrix.as_ptr());
-            gl.Uniform2f(program.uniform_size, dest.size.w as f32, dest.size.h as f32);
+            gl.Uniform2f(program.uniform_size, size.w as f32, size.h as f32);
             gl.Uniform1f(program.uniform_alpha, alpha);
             let tint = if self.renderer.debug_flags.contains(DebugFlags::TINT) {
                 1.0f32