Resources: Remove small splash screen image variant

After the previous commit by Harley Acheson, scaling can be handled at
runtime so we don't need to have two splash screen image variants
anymore.
Also removes the `splash_scale.sh` script used to create the down-scaled
variant.
Always nice to get rid of some binary files from the repository :)

release/datafiles/splash_scale.sh

@@ -1,18 +0,0 @@
-#!/bin/bash
-
-# Use this script to generate splash.png from splash_2x.png.
-# Supposed to give best quality image.
-#
-# Based on ImageMagic documentation, which is interesting
-# to read anyway:
-#
-#  http://www.imagemagick.org/Usage/filter
-#  http://www.imagemagick.org/Usage/filter/nicolas/
-
-convert \
-  splash_2x.png \
-  -colorspace RGB \
-  -filter Cosine \
-  -resize 50% \
-  -colorspace sRGB \
-  splash.png

source/blender/editors/datafiles/CMakeLists.txt

@@ -779,7 +779,6 @@ if(WITH_BLENDER)
 
     # images
     data_to_c_simple(../../../../release/datafiles/splash.png SRC)
-    data_to_c_simple(../../../../release/datafiles/splash_2x.png SRC)
     data_to_c_simple(../../../../release/datafiles/alert_icons.png SRC)
     # XXX These are handy, but give nasty "false changes" in svn :/
     # svg_to_png(../../../../release/datafiles/blender_icons.svg

source/blender/editors/include/ED_datafiles.h

@@ -54,9 +54,6 @@ extern char datatoc_alert_icons_png[];
 extern int datatoc_splash_png_size;
 extern char datatoc_splash_png[];
 
-extern int datatoc_splash_2x_png_size;
-extern char datatoc_splash_2x_png[];
-
 extern int datatoc_bfont_pfb_size;
 extern char datatoc_bfont_pfb[];
 

source/blender/windowmanager/intern/wm_splash_screen.c

@@ -181,8 +181,8 @@ static void wm_block_splash_add_labels(uiBlock *block, int x, int y)
 static ImBuf *wm_block_splash_image(void)
 {
 #ifndef WITH_HEADLESS
-  extern char datatoc_splash_2x_png[];
-  extern int datatoc_splash_2x_png_size;
+  extern char datatoc_splash_png[];
+  extern int datatoc_splash_png_size;
 
   ImBuf *ibuf = NULL;
 
@@ -197,8 +197,8 @@ static ImBuf *wm_block_splash_image(void)
   }
 
   if (ibuf == NULL) {
-    const uchar *splash_data = (const uchar *)datatoc_splash_2x_png;
-    size_t splash_data_size = datatoc_splash_2x_png_size;
+    const uchar *splash_data = (const uchar *)datatoc_splash_png;
+    size_t splash_data_size = datatoc_splash_png_size;
     ibuf = IMB_ibImageFromMemory(splash_data, splash_data_size, IB_rect, NULL, "<splash screen>");
   }