kms_vaapi: add cursor capture for amd/intel monitor capture

Always find largest drm buf, to fix some cases
when there are multiple planes and we accidentally
capture a drm buf that isn't the target buf.
We always want the full SCREEN drm buf.

build.sh

@@ -27,11 +27,12 @@ build_gsr() {
     gcc -c src/window_texture.c $opts $includes
     gcc -c src/shader.c $opts $includes
     gcc -c src/color_conversion.c $opts $includes
+    gcc -c src/cursor.c $opts $includes
     gcc -c src/utils.c $opts $includes
     gcc -c src/library_loader.c $opts $includes
     g++ -c src/sound.cpp $opts $includes
     g++ -c src/main.cpp $opts $includes
-    g++ -o gpu-screen-recorder -O2 capture.o nvfbc.o kms_client.o egl.o cuda.o xnvctrl.o overclock.o window_texture.o shader.o color_conversion.o utils.o library_loader.o xcomposite_cuda.o xcomposite_vaapi.o kms_vaapi.o sound.o main.o -s $libs
+    g++ -o gpu-screen-recorder -O2 capture.o nvfbc.o kms_client.o egl.o cuda.o xnvctrl.o overclock.o window_texture.o shader.o color_conversion.o cursor.o utils.o library_loader.o xcomposite_cuda.o xcomposite_vaapi.o kms_vaapi.o sound.o main.o -s $libs
 }
 
 build_gsr_kms_server