From 5f74e093a4679cdc0fe9fa42822a14fecc7b1cbb Mon Sep 17 00:00:00 2001
From: natrixaeria <janng@gmx.de>
Date: Sun, 26 May 2019 20:59:02 +0200
Subject: Compile webgl shader program

---
 WebInterface/wasm/asm-paint/Cargo.toml    |  6 +++---
 WebInterface/wasm/asm-paint/src/canvas.rs |  6 ++++++
 WebInterface/wasm/asm-paint/src/shader.rs | 13 ++++++++++++-
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/WebInterface/wasm/asm-paint/Cargo.toml b/WebInterface/wasm/asm-paint/Cargo.toml
index 269d77d..ceb1866 100644
--- a/WebInterface/wasm/asm-paint/Cargo.toml
+++ b/WebInterface/wasm/asm-paint/Cargo.toml
@@ -14,16 +14,16 @@ crate-type = ["cdylib"]
 wasm-bindgen = "0.2"
 log = "0.4"
 fern = "0.5"
-js-sys = "0.3"
 
 [dependencies.web-sys]
-version = "0.3"
+version = "0.3.22"
 features = [
     'Document',
     'Element',
     'HtmlCanvasElement',
     'WebGl2RenderingContext',
-    'WebGlProgram',
     'WebGlShader',
+    'WebGlProgram',
+    'WebGlBuffer',
     'Window'
 ]
diff --git a/WebInterface/wasm/asm-paint/src/canvas.rs b/WebInterface/wasm/asm-paint/src/canvas.rs
index ddf6d51..54691e8 100644
--- a/WebInterface/wasm/asm-paint/src/canvas.rs
+++ b/WebInterface/wasm/asm-paint/src/canvas.rs
@@ -39,3 +39,9 @@ impl Canvas {
             .map_err(|e| error!("webgl2 shader: {}", e))
     }
 }
+
+impl Drop for Canvas {
+    fn drop(&mut self) {
+        self.shaders.remove(&self.ctx);
+    }
+}
diff --git a/WebInterface/wasm/asm-paint/src/shader.rs b/WebInterface/wasm/asm-paint/src/shader.rs
index ac7c767..3311b6a 100644
--- a/WebInterface/wasm/asm-paint/src/shader.rs
+++ b/WebInterface/wasm/asm-paint/src/shader.rs
@@ -57,6 +57,17 @@ impl Shaders {
     }
 
     pub fn compile(&mut self, ctx: &WebGl2RenderingContext) -> Result<(), String> {
-        Ok(())
+        let program = self.program.as_ref().ok_or("could not find created program")?;
+        ctx.link_program(program);
+        let status = ctx.get_program_parameter(program, WebGl2RenderingContext::LINK_STATUS);
+        if status == wasm_bindgen::JsValue::TRUE {
+            Ok(())
+        } else {
+            Err(format!("\n{}", ctx.get_program_info_log(program).unwrap_or_default()))
+        }
+    }
+
+    pub fn remove(&mut self, ctx: &WebGl2RenderingContext) {
+        ctx.delete_program(self.program.as_ref())
     }
 }
-- 
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