lib/gamnit flat: intro `show_splash_screen`

[nit.git] / lib / gamnit / flat.nit

diff --git a/lib/gamnit/flat.nit b/lib/gamnit/flat.nit
index eaa5ba8..b598f01 100644 (file)
--- a/lib/gamnit/flat.nit
+++ b/lib/gamnit/flat.nit
@@ -68,6 +68,10 @@ class Sprite
                glActiveTexture gl_TEXTURE0
                glBindTexture(gl_TEXTURE_2D, texture.root.gl_texture)
 
+               simple_2d_program.translation.array_enabled = false
+               simple_2d_program.color.array_enabled = false
+               simple_2d_program.scale.array_enabled = false
+
                simple_2d_program.translation.uniform(center.x, -center.y, center.z, 0.0)
                simple_2d_program.color.uniform(1.0, 1.0, 1.0, alpha)
                simple_2d_program.scale.uniform scale
@@ -179,8 +183,11 @@ redef class App
                assert gl_error == gl_NO_ERROR else print gl_error
        end
 
+       # Draw the whole screen, all `glDraw...` calls should be executed here
+       protected fun frame_core_draw(display: GamnitDisplay) do frame_core_flat display
+
        # Draw sprites in `sprites` and `ui_sprites`
-       protected fun frame_core_draw(display: GamnitDisplay)
+       protected fun frame_core_flat(display: GamnitDisplay)
        do
                simple_2d_program.use
 
@@ -205,6 +212,27 @@ redef class App
        # Main method to refine in clients to update game logic and `sprites`
        fun update(dt: Float) do end
 
+       # Display `texture` as a splash screen
+       #
+       # Load `texture` if needed and resets `ui_camera` to 1080 units on the Y axis.
+       fun show_splash_screen(texture: Texture)
+       do
+               texture.load
+
+               ui_camera.reset_height 1080.0
+
+               var splash = new Sprite(texture, ui_camera.center)
+               ui_sprites.add splash
+
+               var display = display
+               assert display != null
+               glClear gl_COLOR_BUFFER_BIT
+               frame_core_flat display
+               display.flip
+
+               ui_sprites.remove splash
+       end
+
        redef fun on_stop
        do
                # Clean up