From 438825a7ce98a0cd455ff0adebd6d3cf8d3209be Mon Sep 17 00:00:00 2001 From: natrixaeria Date: Fri, 14 Jun 2019 17:20:01 +0200 Subject: Draw a rectangle --- webhogg/wasm/src/context/shader.rs | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 webhogg/wasm/src/context/shader.rs (limited to 'webhogg/wasm/src/context/shader.rs') diff --git a/webhogg/wasm/src/context/shader.rs b/webhogg/wasm/src/context/shader.rs new file mode 100644 index 0000000..9ccb9fc --- /dev/null +++ b/webhogg/wasm/src/context/shader.rs @@ -0,0 +1,34 @@ +use crate::error::WasmError; +use super::webgl; +use super::webgl::{WebGl2, ShaderType}; + +pub const MAIN_VERTEX_SHADER: &str = include_str!("main.vs"); +pub const MAIN_FRAGMENT_SHADER: &str = include_str!("main.fs"); + +pub struct ShaderProgram { + program: webgl::WebGlProgram, +} + +impl ShaderProgram { + pub fn from_sources(gl: &WebGl2, sources: &[(ShaderType, String)]) -> Result { + let program = gl.create_program() + .map_err(|_| WasmError::Shader(format!("glCreateProgram failed ({})", gl.get_error())))?; + for (shader_type, source) in sources { + let shader = gl.create_shader(shader_type) + .map_err(|_| WasmError::Shader(format!("glCreateShader failed ({})", gl.get_error())))?; + gl.shader_source(&shader, source); + gl.compile_shader(&shader) + .map_err(|e| WasmError::Shader(format!("compile error in {} shader: {}", shader_type, e)))?; + gl.attach_shader(&program, &shader) + } + gl.link_program(&program) + .map_err(|e| WasmError::Shader(format!("linker error in program: {}", e)))?; + Ok(Self { + program + }) + } + + pub fn run(&self, gl: &WebGl2) { + gl.use_program(&self.program) + } +} -- cgit v1.2.3-54-g00ecf