3 files changed, 91 insertions, 0 deletions

diff --git a/src/render_helpers/shaders/mod.rs b/src/render_helpers/shaders/mod.rs
index 21287a55..12e9d4ed 100644
--- a/src/render_helpers/shaders/mod.rs
+++ b/src/render_helpers/shaders/mod.rs
@@ -15,6 +15,7 @@ pub struct Shaders {
     pub resize: Option<ShaderProgram>,
     pub custom_resize: RefCell<Option<ShaderProgram>>,
     pub custom_close: RefCell<Option<ShaderProgram>>,
+    pub custom_open: RefCell<Option<ShaderProgram>>,
 }
 
 #[derive(Debug, Clone, Copy)]
@@ -22,6 +23,7 @@ pub enum ProgramType {
     Border,
     Resize,
     Close,
+    Open,
 }
 
 impl Shaders {
@@ -75,6 +77,7 @@ impl Shaders {
             resize,
             custom_resize: RefCell::new(None),
             custom_close: RefCell::new(None),
+            custom_open: RefCell::new(None),
         }
     }
 
@@ -105,6 +108,13 @@ impl Shaders {
         self.custom_close.replace(program)
     }
 
+    pub fn replace_custom_open_program(
+        &self,
+        program: Option<ShaderProgram>,
+    ) -> Option<ShaderProgram> {
+        self.custom_open.replace(program)
+    }
+
     pub fn program(&self, program: ProgramType) -> Option<ShaderProgram> {
         match program {
             ProgramType::Border => self.border.clone(),
@@ -114,6 +124,7 @@ impl Shaders {
                 .clone()
                 .or_else(|| self.resize.clone()),
             ProgramType::Close => self.custom_close.borrow().clone(),
+            ProgramType::Open => self.custom_open.borrow().clone(),
         }
     }
 }
@@ -216,6 +227,49 @@ pub fn set_custom_close_program(renderer: &mut GlesRenderer, src: Option<&str>)
     }
 }
 
+fn compile_open_program(
+    renderer: &mut GlesRenderer,
+    src: &str,
+) -> Result<ShaderProgram, GlesError> {
+    let mut program = include_str!("open_prelude.frag").to_string();
+    program.push_str(src);
+    program.push_str(include_str!("open_epilogue.frag"));
+
+    ShaderProgram::compile(
+        renderer,
+        &program,
+        &[
+            UniformName::new("niri_input_to_geo", UniformType::Matrix3x3),
+            UniformName::new("niri_geo_size", UniformType::_2f),
+            UniformName::new("niri_geo_to_tex", UniformType::Matrix3x3),
+            UniformName::new("niri_progress", UniformType::_1f),
+            UniformName::new("niri_clamped_progress", UniformType::_1f),
+            UniformName::new("niri_random_seed", UniformType::_1f),
+        ],
+        &["niri_tex"],
+    )
+}
+
+pub fn set_custom_open_program(renderer: &mut GlesRenderer, src: Option<&str>) {
+    let program = if let Some(src) = src {
+        match compile_open_program(renderer, src) {
+            Ok(program) => Some(program),
+            Err(err) => {
+                warn!("error compiling custom open shader: {err:?}");
+                return;
+            }
+        }
+    } else {
+        None
+    };
+
+    if let Some(prev) = Shaders::get(renderer).replace_custom_open_program(program) {
+        if let Err(err) = prev.destroy(renderer) {
+            warn!("error destroying previous custom open shader: {err:?}");
+        }
+    }
+}
+
 pub fn mat3_uniform(name: &str, mat: Mat3) -> Uniform {
     Uniform::new(
         name,
diff --git a/src/render_helpers/shaders/open_epilogue.frag b/src/render_helpers/shaders/open_epilogue.frag
new file mode 100644
index 00000000..1e5f5375
--- /dev/null
+++ b/src/render_helpers/shaders/open_epilogue.frag
@@ -0,0 +1,16 @@
+
+void main() {
+    vec3 coords_geo = niri_input_to_geo * vec3(niri_v_coords, 1.0);
+    vec3 size_geo = vec3(niri_geo_size, 1.0);
+
+    vec4 color = open_color(coords_geo, size_geo);
+
+    color = color * niri_alpha;
+
+#if defined(DEBUG_FLAGS)
+    if (niri_tint == 1.0)
+        color = vec4(0.0, 0.2, 0.0, 0.2) + color * 0.8;
+#endif
+
+    gl_FragColor = color;
+}
diff --git a/src/render_helpers/shaders/open_prelude.frag b/src/render_helpers/shaders/open_prelude.frag
new file mode 100644
index 00000000..db42190b
--- /dev/null
+++ b/src/render_helpers/shaders/open_prelude.frag
@@ -0,0 +1,21 @@
+precision mediump float;
+
+#if defined(DEBUG_FLAGS)
+uniform float niri_tint;
+#endif
+
+varying vec2 niri_v_coords;
+uniform vec2 niri_size;
+
+uniform mat3 niri_input_to_geo;
+uniform vec2 niri_geo_size;
+
+uniform sampler2D niri_tex;
+uniform mat3 niri_geo_to_tex;
+
+uniform float niri_progress;
+uniform float niri_clamped_progress;
+uniform float niri_random_seed;
+
+uniform float niri_alpha;
+