[ren.quad] quad renderer now has code setup to regenerate its project…

…ion matrix if it detects that the window has been resized. however, as projection matrices are not yet implemented this code is not complete

src/tz/ren/quad.cpp

@@ -5,6 +5,7 @@
 #include "tz/gpu/pass.hpp"
 #include "tz/gpu/graph.hpp"
 #include "tz/gpu/shader.hpp"
+#include "tz/os/window.hpp"
 
 #include ImportedShaderHeader(quad, vertex)
 #include ImportedShaderHeader(quad, fragment)
@@ -20,6 +21,8 @@ namespace tz::ren
 		tz::gpu::graph_handle graph = tz::nullhand;
 		std::size_t quad_count = 0;
 		std::size_t texture_count = 0;
+		unsigned int window_width_cache;
+		unsigned int window_height_cache;
 	};
 
 	struct quad_data
@@ -98,6 +101,9 @@ namespace tz::ren
 			.add_pass(ren.main_pass)
 			.build());
 
+		ren.window_width_cache = tz::os::window_get_width();
+		ren.window_height_cache = tz::os::window_get_height();
+
 		return static_cast<tz::hanval>(id);
 	}
 
@@ -219,6 +225,16 @@ namespace tz::ren
 	void quad_renderer_update(quad_renderer_handle renh)
 	{
 		auto& ren = renderers[renh.peek()];
-		(void)ren;
+
+		auto w = tz::os::window_get_width();
+		auto h = tz::os::window_get_height();
+		if((w != 0 && h != 0) && (ren.window_width_cache != w || ren.window_height_cache != h))
+		{
+			// window has resized
+			ren.window_width_cache = w;
+			ren.window_height_cache = h;
+			// todo: regenerate projection matrix.
+
+		}
 	}
 }