plplot: make svgalib based video mode work somewhat.

plplot/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=plplot
 PKG_VERSION:=5.9.7
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=@SF/$(PKG_NAME)/$(PKG_VERSION)%20Source
 PKG_MD5SUM:=c53c484ed93ce8446513c31707551b5b
@@ -117,7 +117,7 @@ endef
 
 define Package/plplot-linuxvga
 $(call Package/plplot/Default)
-  DEPENDS:= +svgalib
+  DEPENDS:= +plplot +svgalib
   TITLE+= (svgalib driver)
 endef
 

plplot/patches/050-linuxvga-320x240x16M.patch

@@ -0,0 +1,53 @@
+Index: plplot-5.9.7/drivers/linuxvga.c
+===================================================================
+--- plplot-5.9.7.orig/drivers/linuxvga.c	2011-01-08 12:20:09.000000000 +0100
++++ plplot-5.9.7/drivers/linuxvga.c	2011-01-08 12:27:34.000000000 +0100
+@@ -39,8 +39,8 @@
+ 
+ /* INDENT ON */
+ 
+-static PLINT vgax = 639;
+-static PLINT vgay = 479;
++static PLINT vgax = 319;
++static PLINT vgay = 239;
+ 
+ /* A flag to tell us whether we are in text or graphics mode */
+ 
+@@ -95,7 +95,7 @@
+ /* What kind of VGA mode one wants is set up here.
+  * It can be easyly made interactive! */
+ 
+-    mode = G640x480x16;         /* See <vga.h> for a list */
++    mode = G320x240x16M32;         /* See <vga.h> for a list */
+     if ( vga_hasmode( mode ) )
+         vga_setmode( mode );
+     else
+@@ -202,6 +202,13 @@
+ void
+ plD_state_vga( PLStream *pls, PLINT op )
+ {
++   static const int vga_palette[16] = {
++      0x000000, 0x000080, 0x008000, 0x008080, 
++      0x800000, 0x800080, 0x808000, 0xc0c0c0,
++      0x808080, 0x0000ff, 0x00ff00, 0x00ffff,
++      0xff0000, 0xff00ff, 0xffff00, 0xffffff
++   };
++
+     switch ( op )
+     {
+     case PLSTATE_WIDTH:
+@@ -210,11 +217,9 @@
+     case PLSTATE_COLOR0:
+         if ( pls->color )
+         {
+-            /* Maybe it would be wiser to use a set of 16 relevant colors only
+-             * and just fix it to black if col is exceeded 16.        */
+-
+-            col = ( pls->icol0 ) % totcol;        /* Color modulo # of colors
+-                                                   * avail */
++	    /* fix to make it work with true-color mode */
++ 	    if (col < 16)
++	        col = vga_palette[col];
+             vga_setcolor( col );
+         }
+         break;