gamnit: resize in dynamic resolution

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/gamnit/dynamic_resolution.nit b/lib/gamnit/dynamic_resolution.nit
index 40ea221..5af305c 100644 (file)
--- a/lib/gamnit/dynamic_resolution.nit
+++ b/lib/gamnit/dynamic_resolution.nit
@@ -64,6 +64,12 @@ redef class App
                assert error == null else print_error error
        end
 
+       redef fun on_resize(display)
+       do
+               dynamic_context.resize(display, max_dynamic_resolution_ratio)
+               super
+       end
+
        # Prepare to draw to the dynamic screen if `dynamic_resolution_ratio != 1.0`
        protected fun frame_core_dynamic_resolution_before(display: GamnitDisplay)
        do
@@ -176,9 +182,6 @@ private class DynamicContext
        do
                # TODO enable antialiasing.
 
-               var width = (display.width.to_f * max_dynamic_resolution_ratio).to_i
-               var height = (display.height.to_f * max_dynamic_resolution_ratio).to_i
-
                # Set aside the real screen framebuffer name
                var screen_framebuffer = glGetIntegerv(gl_FRAMEBUFFER_BINDING, 0)
                self.screen_framebuffer = screen_framebuffer
@@ -188,34 +191,19 @@ private class DynamicContext
                glBindFramebuffer(gl_FRAMEBUFFER, framebuffer)
                assert glIsFramebuffer(framebuffer)
                self.dynamic_framebuffer = framebuffer
+               var gl_error = glGetError
+               assert gl_error == gl_NO_ERROR else print_error gl_error
 
-               # Depth
+               # Depth & texture/color
                var depthbuffer = glGenRenderbuffers(1).first
-               glBindRenderbuffer(gl_RENDERBUFFER, depthbuffer)
-               assert glIsRenderbuffer(depthbuffer)
-               glRenderbufferStorage(gl_RENDERBUFFER, gl_DEPTH_COMPNENT16, width, height)
-               glFramebufferRenderbuffer(gl_FRAMEBUFFER, gl_DEPTH_ATTACHMENT, gl_RENDERBUFFER, depthbuffer)
                self.depth_renderbuffer = depthbuffer
-
-               # Texture
                var texture = glGenTextures(1).first
-               glBindTexture(gl_TEXTURE_2D, texture)
-               glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_MIN_FILTER, gl_LINEAR)
-               glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_MAG_FILTER, gl_LINEAR)
-               glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_WRAP_S, gl_CLAMP_TO_EDGE)
-               glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_WRAP_T, gl_CLAMP_TO_EDGE)
-               glTexImage2D(gl_TEXTURE_2D, 0, gl_RGB, width, height,
-                            0, gl_RGB, gl_UNSIGNED_BYTE, new Pointer.nul)
-               glFramebufferTexture2D(gl_FRAMEBUFFER, gl_COLOR_ATTACHMENT0, gl_TEXTURE_2D, texture, 0)
                self.texture = texture
-
-               var gl_error = glGetError
+               gl_error = glGetError
                assert gl_error == gl_NO_ERROR else print_error gl_error
-               assert glCheckFramebufferStatus(gl_FRAMEBUFFER) == gl_FRAMEBUFFER_COMPLETE
 
-               # Take down
-               glBindRenderbuffer(gl_RENDERBUFFER, 0)
-               glBindFramebuffer(gl_FRAMEBUFFER, 0)
+               resize(display, max_dynamic_resolution_ratio)
+               assert glCheckFramebufferStatus(gl_FRAMEBUFFER) == gl_FRAMEBUFFER_COMPLETE
 
                # Array buffer
                buffer_array = glGenBuffers(1).first
@@ -244,6 +232,46 @@ private class DynamicContext
                assert gl_error == gl_NO_ERROR else print_error gl_error
        end
 
+       # Init size or resize `depth_renderbuffer` and `texture`
+       fun resize(display: GamnitDisplay, max_dynamic_resolution_ratio: Float)
+       do
+               var width = (display.width.to_f * max_dynamic_resolution_ratio).to_i
+               var height = (display.height.to_f * max_dynamic_resolution_ratio).to_i
+
+               glBindFramebuffer(gl_FRAMEBUFFER, dynamic_framebuffer)
+
+               var depthbuffer = self.depth_renderbuffer
+               var texture = self.texture
+
+               # Depth
+               glBindRenderbuffer(gl_RENDERBUFFER, depthbuffer)
+               assert glIsRenderbuffer(depthbuffer)
+               glRenderbufferStorage(gl_RENDERBUFFER, gl_DEPTH_COMPNENT16, width, height)
+               glFramebufferRenderbuffer(gl_FRAMEBUFFER, gl_DEPTH_ATTACHMENT, gl_RENDERBUFFER, depthbuffer)
+               var gl_error = glGetError
+               assert gl_error == gl_NO_ERROR else print_error gl_error
+
+               # Texture
+               glBindTexture(gl_TEXTURE_2D, texture)
+               glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_MIN_FILTER, gl_LINEAR)
+               glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_MAG_FILTER, gl_LINEAR)
+               glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_WRAP_S, gl_CLAMP_TO_EDGE)
+               glTexParameteri(gl_TEXTURE_2D, gl_TEXTURE_WRAP_T, gl_CLAMP_TO_EDGE)
+               glTexImage2D(gl_TEXTURE_2D, 0, gl_RGB, width, height,
+                            0, gl_RGB, gl_UNSIGNED_BYTE, new Pointer.nul)
+               glFramebufferTexture2D(gl_FRAMEBUFFER, gl_COLOR_ATTACHMENT0, gl_TEXTURE_2D, texture, 0)
+
+               gl_error = glGetError
+               assert gl_error == gl_NO_ERROR else print_error gl_error
+
+               # Take down
+               glBindRenderbuffer(gl_RENDERBUFFER, 0)
+               glBindFramebuffer(gl_FRAMEBUFFER, 0)
+
+               gl_error = glGetError
+               assert gl_error == gl_NO_ERROR else print_error gl_error
+       end
+
        var destroyed = false
        fun destroy
        do