shaders and textures

1 files changed, 50 insertions, 0 deletions

diff --git a/src/shader/shader.odin b/src/shader/shader.odin
new file mode 100644
index 0000000..171d7ad
--- /dev/null
+++ b/src/shader/shader.odin
@@ -0,0 +1,50 @@
+package shader
+
+import "core:os"
+import "core:strings"
+import gl "vendor:OpenGL"
+
+Shader :: struct {
+	id: u32,
+}
+
+SHADER_LOAD_ERROR :: -1
+SHADER_OK :: 0
+
+shader_init :: proc(vsp, fsp: string) -> (^Shader, int) {
+	assert(os.is_file_path(vsp))
+	assert(os.is_file_path(fsp))
+
+	program_id, ok := gl.load_shaders_file(vsp, fsp)
+
+	if !ok {
+		return nil, SHADER_LOAD_ERROR
+	}
+
+	shader := new(Shader)
+	shader.id = program_id
+
+	return shader, SHADER_OK
+}
+
+use :: proc(using shader: ^Shader) {
+	gl.UseProgram(id)
+}
+
+set_bool :: proc(using shader: ^Shader, name: cstring, value: bool) {
+	gl.Uniform1i(gl.GetUniformLocation(id, name), i32(value))
+}
+
+set_i32 :: proc(using shader: ^Shader, name: cstring, value: i32) {
+	gl.Uniform1i(gl.GetUniformLocation(id, name), value)
+}
+
+set_f32 :: proc(using shader: ^Shader, name: cstring, value: f32) {
+	gl.Uniform1f(gl.GetUniformLocation(id, name), value)
+}
+
+set_value :: proc {
+	set_i32,
+	set_f32,
+	set_bool,
+}