Initial commit.

renderer.odin

@@ -0,0 +1,90 @@
+package renderer
+
+import "core:fmt"
+
+RENDER_BACKEND_OPENGL       :: #config(RENDER_BACKEND_OPENGL,       false)
+RENDER_BACKEND_VULKAN       :: #config(RENDER_BACKEND_VULKAN,       false)
+RENDER_BACKEND_DIRECTX11    :: #config(RENDER_BACKEND_DIRECTX11,    false)
+RENDER_BACKEND_METAL        :: #config(RENDER_BACKEND_METAL,        false)
+
+Renderer :: struct {
+    api: Renderer_API,
+
+    viewport: Viewport,
+    surface_ptr: rawptr,
+    backend: rawptr,
+}
+
+Viewport :: struct {
+    x, y, width, height: u16,
+}
+
+Renderer_API :: enum {
+    OpenGL,
+    Vulkan,
+    DirectX11,
+    Metal,
+}
+
+
+create :: proc(surface_ptr: rawptr) -> (^Renderer, bool) {
+    renderer := new(Renderer)
+    renderer.surface_ptr = surface_ptr
+
+    when RENDER_BACKEND_OPENGL {
+        if !opengl_init(renderer) {
+            fmt.printfln("Failed to initialize OpenGL.")
+            destroy(renderer)
+            return nil, false
+        }
+    }
+    else {
+        destroy(renderer)
+        
+        fmt.printfln("Unhandled backend or no backend selected.")
+        return nil, false
+    }
+    
+    // TODO: SS - Init renderer using 'api'.
+    return renderer, true
+}
+
+set_viewport :: proc(renderer: ^Renderer, x, y, width, height: u16) {
+    fmt.printfln("Setting viewport to %v:%v, %vx%v.", x, y, width, height)
+
+    renderer.viewport = {
+        x = x,
+        y = y,
+        width = width,
+        height = height,
+    }
+
+    when RENDER_BACKEND_OPENGL {
+        opengl_viewport_changed(renderer)
+    }
+}
+
+set_clear_color :: proc(renderer: ^Renderer, color: [3]u8) {
+    when RENDER_BACKEND_OPENGL {
+        opengl_set_clear_color(renderer, color)
+    }
+}
+
+render_frame :: proc(renderer: ^Renderer) {
+    
+}
+
+swap_buffers :: proc(renderer: ^Renderer) {
+    when RENDER_BACKEND_OPENGL {
+        opengl_swap_buffers(renderer)
+    }
+}
+
+destroy :: proc(renderer: ^Renderer) {
+    when RENDER_BACKEND_OPENGL {
+        opengl_destroy(renderer)
+    }
+    
+    free(renderer)
+    renderer^ = {}
+}