initial

zephr/shader.odin

@@ -0,0 +1,57 @@
+package zephr
+
+import "core:fmt"
+
+import gl "vendor:OpenGL"
+
+Shader :: struct {
+  program: u32
+}
+
+create_shader :: proc(vertex_path: string, fragment_path: string) -> (Shader, bool) {
+  shader: Shader
+
+  program, success := gl.load_shaders(vertex_path, fragment_path)
+  shader.program = program;
+
+  return shader, success;
+}
+
+use_shader :: proc(shader: Shader) {
+  gl.UseProgram(shader.program);
+}
+
+set_mat4f :: proc(shader: Shader, name: cstring, mat4: Mat4, transpose: bool = false) {
+  mat4 := mat4
+  loc := gl.GetUniformLocation(shader.program, name);
+  gl.UniformMatrix4fv(loc, 1, transpose, raw_data(&mat4))
+}
+
+set_float :: proc(shader: Shader, name: cstring, val: f32) {
+  loc := gl.GetUniformLocation(shader.program, name);
+  gl.Uniform1f(loc, val);
+}
+
+set_int :: proc(shader: Shader, name: cstring, val: i32) {
+  loc := gl.GetUniformLocation(shader.program, name);
+  gl.Uniform1i(loc, val);
+}
+
+set_bool :: proc(shader: Shader, name: cstring, val: bool) {
+  set_int(shader, name, cast(i32)val);
+}
+
+set_vec2f :: proc(shader: Shader, name: cstring, val1: f32, val2: f32) {
+  loc := gl.GetUniformLocation(shader.program, name);
+  gl.Uniform2f(loc, val1, val2);
+}
+
+set_vec3f :: proc(shader: Shader, name: cstring, val1: f32, val2: f32, val3: f32) {
+  loc := gl.GetUniformLocation(shader.program, name);
+  gl.Uniform3f(loc, val1, val2, val3);
+}
+
+set_vec4f :: proc(shader: Shader, name: cstring, val1: f32, val2: f32, val3: f32, val4: f32) {
+  loc := gl.GetUniformLocation(shader.program, name);
+  gl.Uniform4f(loc, val1, val2, val3, val4);
+}