try to ensure fbdev buffer is valid

[pcsx_rearmed.git] / plugins / gpu_unai / gpu.cpp

diff --git a/plugins/gpu_unai/gpu.cpp b/plugins/gpu_unai/gpu.cpp
index fa19b63..3e69aaa 100644 (file)
--- a/plugins/gpu_unai/gpu.cpp
+++ b/plugins/gpu_unai/gpu.cpp
@@ -864,8 +864,8 @@ static void blit(void)
        static s16 old_res_horz, old_res_vert, old_rgb24;
        s16 isRGB24 = (GPU_GP1 & 0x00200000) ? 1 : 0;
        s16 h0, x0, y0, w0, h1;
-       u8  *dest = (u8 *)screen_buf;
        u16 *srcs;
+       u8  *dest;
 
        x0 = DisplayArea[0] & ~3; // alignment needed by blitter
        y0 = DisplayArea[1];
@@ -877,13 +877,17 @@ static void blit(void)
        h1 = DisplayArea[5] - DisplayArea[4]; // display needed
        if (h0 == 480) h1 = Min2(h1*2,480);
 
+       if (h1 <= 0)
+               return;
+
        if (w0 != old_res_horz || h1 != old_res_vert || isRGB24 != old_rgb24)
        {
                old_res_horz = w0;
                old_res_vert = h1;
                old_rgb24 = (s16)isRGB24;
-               cbs->pl_fbdev_set_mode(w0, h1, isRGB24 ? 24 : 16);
+               screen_buf = cbs->pl_fbdev_set_mode(w0, h1, isRGB24 ? 24 : 16);
        }
+       dest = (u8 *)screen_buf;
 
        if (isRGB24)
        {