diff options
Diffstat (limited to 'WebInterface/wasm/asm-paint/src/shader.rs')
-rw-r--r-- | WebInterface/wasm/asm-paint/src/shader.rs | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/WebInterface/wasm/asm-paint/src/shader.rs b/WebInterface/wasm/asm-paint/src/shader.rs new file mode 100644 index 0000000..ac7c767 --- /dev/null +++ b/WebInterface/wasm/asm-paint/src/shader.rs @@ -0,0 +1,62 @@ +use web_sys::{WebGlProgram, WebGl2RenderingContext}; + +const VERTEX_SHADER: &str = r#"#version 300 es +in vec4 pos; +void main() { + gl_Position = pos; +} +"#; + +const FRAGMENT_SHADER: &str = r#"#version 300 es +precision mediump float; +out vec4 color; + +void main() { + color = vec4(1, 0, 0, 1); +} +"#; + +pub struct Shaders { + program: Option<WebGlProgram>, +} + +impl Shaders { + pub fn new() -> Self { + Self { + program: None, + } + } + + pub fn create_program(&mut self, ctx: &WebGl2RenderingContext) -> Result<(), String> { + self.program = Some(ctx.create_program().ok_or("could not create program id")?); + Ok(()) + } + + fn create_shader(&mut self, ctx: &WebGl2RenderingContext, + shader_type: u32, source: &str) -> Result<(), String> { + let program = self.program.as_ref().ok_or("could not find created program")?; + let shader = ctx.create_shader(shader_type) + .ok_or("could not create shader")?; + ctx.shader_source(&shader, source); + ctx.compile_shader(&shader); + let status = ctx.get_shader_parameter(&shader, WebGl2RenderingContext::COMPILE_STATUS); + if status == wasm_bindgen::JsValue::TRUE { + ctx.attach_shader(program, &shader); + Ok(()) + } else { + Err(format!("\n{}", ctx.get_shader_info_log(&shader).unwrap_or_default())) + } + } + + pub fn create_vertex_shader(&mut self, ctx: &WebGl2RenderingContext) -> Result<(), String> { + self.create_shader(ctx, WebGl2RenderingContext::VERTEX_SHADER, VERTEX_SHADER) + } + + pub fn create_fragment_shader(&mut self, ctx: &WebGl2RenderingContext) -> Result<(), String> { + self.create_shader(ctx, WebGl2RenderingContext::FRAGMENT_SHADER, FRAGMENT_SHADER) + } + + pub fn compile(&mut self, ctx: &WebGl2RenderingContext) -> Result<(), String> { + Ok(()) + } +} |