From e3f3a757f30adc9ea14422e7322dfee1a09a1abb Mon Sep 17 00:00:00 2001 From: Sam Lantinga Date: Sat, 12 Aug 2017 16:02:33 -0700 Subject: [PATCH] Fixed bug 3158 - SDL display window scrambled over VNC Witek Jachimczyk I'm using SDL to develop a video viewer for MATLAB. The window is scrambled while using thightVNC with its default mode of RGB656. SDL does not correctly recognize the pixel mode. I found a solution for this problem. The solution involves modifying SDL/src/video/SDL_pixels.c Adding the following "if statement" under case 16: of SDL_MasksToPixelFormatEnum resolves the issue: if (Rmask == 0x003F && Gmask == 0x07C0 && Bmask == 0xF800 && Amask == 0x0000) { return SDL_PIXELFORMAT_RGB565; } I hope that this helps someone. I took me a while to figure it out. --- src/video/SDL_pixels.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/src/video/SDL_pixels.c b/src/video/SDL_pixels.c index d2e56c533..d552e31bc 100644 --- a/src/video/SDL_pixels.c +++ b/src/video/SDL_pixels.c @@ -403,6 +403,13 @@ SDL_MasksToPixelFormatEnum(int bpp, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Amask == 0x0000) { return SDL_PIXELFORMAT_BGR565; } + if (Rmask == 0x003F && + Gmask == 0x07C0 && + Bmask == 0xF800 && + Amask == 0x0000) { + /* Technically this would be BGR556, but Witek says this works in bug 3158 */ + return SDL_PIXELFORMAT_RGB565; + } break; case 24: switch (Rmask) {