Disable colour profile influence on screenshots and gifs if you want.

(cherry picked from commit 8b46ee76ff)

# Conflicts:
#	src/m_menu.c

src/d_netcmd.c

@@ -789,6 +789,7 @@ void D_RegisterClientCommands(void)
 
 	CV_RegisterVar(&cv_screenshot_option);
 	CV_RegisterVar(&cv_screenshot_folder);
+	CV_RegisterVar(&cv_screenshot_colorprofile);
 	CV_RegisterVar(&cv_moviemode);
 	// PNG variables
 	CV_RegisterVar(&cv_zlib_level);

src/m_anigif.c

@@ -18,6 +18,7 @@
 #include "z_zone.h"
 #include "v_video.h"
 #include "i_video.h"
+#include "m_misc.h"
 
 // GIFs are always little-endian
 #include "byteptr.h"
@@ -396,7 +397,6 @@ static void GIF_headwrite(void)
 {
 	UINT8 *gifhead = Z_Malloc(800, PU_STATIC, NULL);
 	UINT8 *p = gifhead;
-	RGBA_t *c;
 	INT32 i;
 	UINT16 rwidth, rheight;
 
@@ -427,12 +427,24 @@ static void GIF_headwrite(void)
 	WRITEUINT8(p, 0x00);
 
 	// write color table
-	for (i = 0; i < 256; ++i)
+	if (cv_screenshot_colorprofile.value)
 	{
-		c = &pLocalPalette[i];
+		for (i = 0; i < 256; i++)
-		WRITEUINT8(p, c->s.red);
+		{
-		WRITEUINT8(p, c->s.green);
+			WRITEUINT8(p, pLocalPalette[i].s.red);
-		WRITEUINT8(p, c->s.blue);
+			WRITEUINT8(p, pLocalPalette[i].s.green);
+			WRITEUINT8(p, pLocalPalette[i].s.blue);
+		}
+	}
+	else
+	{
+		const UINT8 *pal = (UINT8 *)W_CacheLumpName(GetPalette(), PU_CACHE);
+		for (i = 0; i < 256; i++)
+		{
+			WRITEUINT8(p, *pal); pal++;
+			WRITEUINT8(p, *pal); pal++;
+			WRITEUINT8(p, *pal); pal++;
+		}
 	}
 
 	// write extension block

src/m_misc.c

@@ -104,6 +104,8 @@ static CV_PossibleValue_t screenshot_cons_t[] = {{0, "Default"}, {1, "HOME"}, {2
 consvar_t cv_screenshot_option = {"screenshot_option", "Default", CV_SAVE|CV_CALL, screenshot_cons_t, Screenshot_option_Onchange, 0, NULL, NULL, 0, 0, NULL};
 consvar_t cv_screenshot_folder = {"screenshot_folder", "", CV_SAVE, NULL, NULL, 0, NULL, NULL, 0, 0, NULL};
 
+consvar_t cv_screenshot_colorprofile = {"screenshot_colorprofile", "Yes", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
+
 static CV_PossibleValue_t moviemode_cons_t[] = {{MM_GIF, "GIF"}, {MM_APNG, "aPNG"}, {MM_SCREENSHOT, "Screenshots"}, {0, NULL}};
 consvar_t cv_moviemode = {"moviemode_mode", "GIF", CV_SAVE|CV_CALL, moviemode_cons_t, Moviemode_mode_Onchange, 0, NULL, NULL, 0, 0, NULL};
 
@@ -661,11 +663,24 @@ static void M_PNGhdr(png_structp png_ptr, png_infop png_info_ptr, PNG_CONST png_
 	{
 		png_colorp png_PLTE = png_malloc(png_ptr, sizeof(png_color)*256); //palette
 		png_uint_16 i;
-		for (i = 0; i < 256; i++)
+		if (cv_screenshot_colorprofile.value)
 		{
-			png_PLTE[i].red   = pLocalPalette[i].s.red;
+			for (i = 0; i < 256; i++)
-			png_PLTE[i].green = pLocalPalette[i].s.green;
+			{
-			png_PLTE[i].blue  = pLocalPalette[i].s.blue;
+				png_PLTE[i].red   = pLocalPalette[i].s.red;
+				png_PLTE[i].green = pLocalPalette[i].s.green;
+				png_PLTE[i].blue  = pLocalPalette[i].s.blue;
+			}
+		}
+		else
+		{
+			const png_byte *pal = (png_byte *)W_CacheLumpName(GetPalette(), PU_CACHE);
+			for (i = 0; i < 256; i++)
+			{
+				png_PLTE[i].red   = *pal++;
+				png_PLTE[i].green = *pal++;
+				png_PLTE[i].blue  = *pal++;
+			}
 		}
 		png_set_IHDR(png_ptr, png_info_ptr, width, height, 8, PNG_COLOR_TYPE_PALETTE,
 		 png_interlace, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);

src/m_misc.h

@@ -29,7 +29,7 @@ typedef enum {
 } moviemode_t;
 extern moviemode_t moviemode;
 
-extern consvar_t cv_screenshot_option, cv_screenshot_folder;
+extern consvar_t cv_screenshot_option, cv_screenshot_folder, cv_screenshot_colorprofile;
 extern consvar_t cv_moviemode;
 extern consvar_t cv_zlib_memory, cv_zlib_level, cv_zlib_strategy, cv_zlib_window_bits;
 extern consvar_t cv_zlib_memorya, cv_zlib_levela, cv_zlib_strategya, cv_zlib_window_bitsa;