svgalib.c

ELinks is an advanced and well-established feature-rich text mode web (HTTP/FTP/..) browser. ELinks

/* svgalib.c
 * (c) 2000-2002 Karel 'Clock' Kulhavy
 * This file is a part of the Links program, released under GPL.
 *
 * This does graphics driver of svgalib, svgalib mouse.
 * This doesn't do svgalib keyboard.
 */

#include "cfg.h"

/*
:%s/->left/->clip.x1/g
:%s/->right/->clip.x2/g
:%s/->top/->clip.y1/g
:%s/->bottom/->clip.y2/g
*/

#ifdef GRDRV_SVGALIB

#include "links.h"
#include "bits.h"

#ifdef TEXT
#undef TEXT
#endif

#include <vga.h>
#include <vgamouse.h>
#include "arrow.inc"

extern struct itrm *ditrm;

extern struct graphics_driver svga_driver;
static int mouse_x, mouse_y, mouse_buttons; /* For tracking the state of the mouse */
static int background_x, background_y; /* Where was the mouse background taken from */
static unsigned char *mouse_buffer, *background_buffer, *new_background_buffer;
static struct graphics_device *mouse_graphics_device;
static int global_mouse_hidden;
static long mouse_black, mouse_white; /* Mouse arrow pointer colors */
static int (* mouse_getscansegment)(unsigned char *, int, int, int);
static int (* mouse_drawscansegment)(unsigned char *, int, int, int);
static int mouse_works = 0;
static unsigned char *svga_driver_param; /* NULL by default */
static int vga_mode; /* The mode that has been selected */
static struct graphics_device *backup_virtual_device;
static int mouse_aggregate_flag, mouse_aggregate_action;
static int flags = 0; /* OR-ed 1: running in background
		*       2: vga_block()-ed
		*/
#ifndef __SPAD__
static int svgalib_timer_id;
#endif

/*---------------------------LIMITATIONS---------------------------------------*/
/* pixel_set_paged works only for <=8 bytes per pixel.
 * Doesn't work on video cards which have 1 pixel spanning more that 65536 bytes! ( :-) )
 * vga_linewidth%vga_bytes must be zero.
 * The bitmaps have all consecutive data. No vidram mallocing is performed.
 */

/*------------------------STRUCTURES-------------------------------------------*/
struct modeline{
	unsigned char *name;
	int number;
};

/*-------------- GLOBAL VARIABLES --------------------------------------------*/

#define NUMBER_OF_DEVICES	10

#define TEST_INACTIVITY if (dev!=current_virtual_device) return;

#define TEST_INACTIVITY_0 if (dev!=current_virtual_device) return 0;

#define RECTANGLES_INTERSECT(xl0, xh0, xl1, xh1, yl0, yh0, yl1, yh1) (\
				   (xl0)<(xh1)\
				&& (xl1)<(xh0)\
				&& (yl0)<(yh1)\
				&& (yl1)<(yh0))

#define TEST_MOUSE(xl,xh,yl,yh) if (RECTANGLES_INTERSECT(\
					(xl),(xh),\
					background_x,background_x+arrow_width,\
					(yl),(yh),\
					background_y,background_y+arrow_height)\
					&& !global_mouse_hidden){\
					mouse_hidden=1;\
					hide_mouse();\
				}else mouse_hidden=0;

#define END_MOUSE if (mouse_hidden) show_mouse();

/* Actual vga mode definition */
int vga_linewidth;		/* Prepared out from vga_getmodeinfo */
int xsize, ysize;		/* Prepared out from vga_getmodeinfo */
int vga_bytes;			/* Prepared out from vga_getmodeinfo */
int vga_colors;			/* Prepared out from vga_getmodeinfo */
int vga_misordered;		/* Prepared out from vga_getmodeinfo */
int vga_linear;			/* 1 linear mode, 0 nonlinear mode (paged) */
int palette_depth;		/* 6 for normal VGA, 8 for VGA which supports 8 bit DAC */
int accel_avail;		/* Which accel fns are available */
int do_sync;			/* Tells the "normal" memory operations (those
				 * that do not use accelerator) to do
				 * vga_accel(ACCEL_SYNC) before writing into the
				 * memory.
				 */
int vga_page=-1;
int mode_x;			/* 1 if mode_X organization is set up */
int bmpixelsize;		/* Number of bytes per pixel in bitmap */
unsigned char *my_graph_mem;
unsigned char *scroll_buffer = NULL; /* For paged scrolling only */
struct modeline modes[]={
#ifdef G320x200x16
	{"320x200x16", G320x200x16 },
#endif
#ifdef G320x200x256
	{"320x200x256", G320x200x256 },
#endif
#ifdef G320x200x32K
	{"320x200x32K", G320x200x32K },
#endif
#ifdef G320x200x64K
	{"320x200x64K", G320x200x64K },
#endif
#ifdef G320x200x16M
	{"320x200x16M", G320x200x16M },
#endif
#ifdef G320x200x16M32
	{"320x200x16M32", G320x200x16M32 },
#endif

#ifdef G320x240x256
	{"320x240x256", G320x240x256 },
#endif
#ifdef G320x240x32K
	{"320x240x32K", G320x240x32K },
#endif
#ifdef G320x240x64K
	{"320x240x64K", G320x240x64K },
#endif
#ifdef G320x240x16M
	{"320x240x16M", G320x240x16M },
#endif
#ifdef G320x240x16M32
	{"320x240x16M32", G320x240x16M32 },
#endif

#ifdef G320x400x256
	{"320x400x256", G320x400x256 },
#endif
#ifdef G320x400x32K
	{"320x400x32K", G320x400x32K },
#endif
#ifdef G320x400x64K
	{"320x400x64K", G320x400x64K },
#endif
#ifdef G320x400x16M
	{"320x400x16M", G320x400x16M },
#endif
#ifdef G320x400x16M32
	{"320x400x16M32", G320x400x16M32 },
#endif

#ifdef G320x480x256
	{"320x480x256", G320x480x256 },
#endif
#ifdef G320x480x32K
	{"320x480x32K", G320x480x32K },
#endif
#ifdef G320x480x64K
	{"320x480x64K", G320x480x64K },
#endif
#ifdef G320x480x16M
	{"320x480x16M", G320x480x16M },
#endif
#ifdef G320x480x16M32
	{"320x480x16M32", G320x480x16M32 },
#endif

#ifdef G360x480x256
	{"360x480x256", G360x480x256 },
#endif

#ifdef G400x300x256
	{"400x300x256", G400x300x256 },
#endif
#ifdef G400x300x32K
	{"400x300x32K", G400x300x32K },
#endif
#ifdef G400x300x64K
	{"400x300x64K", G400x300x64K },
#endif
#ifdef G400x300x16M
	{"400x300x16M", G400x300x16M },
#endif
#ifdef G400x300x16M32
	{"400x300x16M32", G400x300x16M32 },
#endif

#ifdef G400x600x256
	{"400x600x256", G400x600x256 },
#endif
#ifdef G400x600x32K
	{"400x600x32K", G400x600x32K },
#endif
#ifdef G400x600x64K
	{"400x600x64K", G400x600x64K },
#endif
#ifdef G400x600x16M
	{"400x600x16M", G400x600x16M },
#endif
#ifdef G400x600x16M32
	{"400x600x16M32", G400x600x16M32 },
#endif

#ifdef G512x384x256
	{"512x384x256", G512x384x256 },
#endif
#ifdef G512x384x32K
	{"512x384x32K", G512x384x32K },
#endif
#ifdef G512x384x64K
	{"512x384x64K", G512x384x64K },
#endif
#ifdef G512x384x16M
	{"512x384x16M", G512x384x16M },
#endif
#ifdef G512x384x16M32
	{"512x384x16M32", G512x384x16M32 },
#endif

#ifdef G512x480x256
	{"512x480x256", G512x480x256 },
#endif
#ifdef G512x480x32K
	{"512x480x32K", G512x480x32K },
#endif
#ifdef G512x480x64K
	{"512x480x64K", G512x480x64K },
#endif
#ifdef G512x480x16M
	{"512x480x16M", G512x480x16M },
#endif
#ifdef G512x480x16M32
	{"512x480x16M32", G512x480x16M32 },
#endif

#ifdef G640x200x16
	{"640x200x16", G640x200x16 },
#endif
#ifdef G640x350x16
	{"640x350x16", G640x350x16 },
#endif

#ifdef G640x400x256
	{"640x400x256", G640x400x256 },
#endif
#ifdef G640x400x32K
	{"640x400x32K", G640x400x32K },
#endif
#ifdef G640x400x64K
	{"640x400x64K", G640x400x64K },
#endif
#ifdef G640x400x16M
	{"640x400x16M", G640x400x16M },
#endif
#ifdef G640x400x16M32
	{"640x400x16M32", G640x400x16M32 },
#endif

#ifdef G640x480x16
	{"640x480x16", G640x480x16 },
#endif
#ifdef G640x480x256
	{"640x480x256", G640x480x256 },
#endif
#ifdef G640x480x32K
	{"640x480x32K", G640x480x32K },
#endif
#ifdef G640x480x64K
	{"640x480x64K", G640x480x64K },
#endif
#ifdef G640x480x16M
	{"640x480x16M", G640x480x16M },
#endif
#ifdef G640x480x16M32
	{"640x480x16M32", G640x480x16M32 },
#endif

#ifdef G720x540x256
	{"720x540x256", G720x540x256 },
#endif
#ifdef G720x540x32K
	{"720x540x32K", G720x540x32K },
#endif
#ifdef G720x540x64K
	{"720x540x64K", G720x540x64K },
#endif
#ifdef G720x540x16M
	{"720x540x16M", G720x540x16M },
#endif
#ifdef G720x540x16M32
	{"720x540x16M32", G720x540x16M32 },
#endif

#ifdef G800x600x16
	{"800x600x16", G800x600x16 },
#endif
#ifdef G800x600x256
	{"800x600x256", G800x600x256 },
#endif
#ifdef G800x600x32K
	{"800x600x32K", G800x600x32K },
#endif
#ifdef G800x600x64K
	{"800x600x64K", G800x600x64K },
#endif
#ifdef G800x600x16M
	{"800x600x16M", G800x600x16M },
#endif
#ifdef G800x600x16M32
	{"800x600x16M32", G800x600x16M32 },
#endif

#ifdef G848x480x256
	{"848x480x256", G848x480x256 },
#endif
#ifdef G848x480x32K
	{"848x480x32K", G848x480x32K },
#endif
#ifdef G848x480x64K
	{"848x480x64K", G848x480x64K },
#endif
#ifdef G848x480x16M
	{"848x480x16M", G848x480x16M },
#endif
#ifdef G848x480x16M32
	{"848x480x16M32", G848x480x16M32 },
#endif

#ifdef G960x720x256
	{"960x720x256", G960x720x256 },
#endif
#ifdef G960x720x32K
	{"960x720x32K", G960x720x32K },
#endif
#ifdef G960x720x64K
	{"960x720x64K", G960x720x64K },
#endif
#ifdef G960x720x16M
	{"960x720x16M", G960x720x16M },
#endif
#ifdef G960x720x16M32
	{"960x720x16M32", G960x720x16M32 },
#endif

#ifdef G1024x768x16
	{"1024x768x16", G1024x768x16 },
#endif
#ifdef G1024x768x256
	{"1024x768x256", G1024x768x256 },
#endif
#ifdef G1024x768x32K
	{"1024x768x32K", G1024x768x32K },
#endif
#ifdef G1024x768x64K
	{"1024x768x64K", G1024x768x64K },
#endif
#ifdef G1024x768x16M
	{"1024x768x16M", G1024x768x16M },
#endif
#ifdef G1024x768x16M32
	{"1024x768x16M32", G1024x768x16M32 },
#endif

#ifdef G1072x600x256
	{"1072x600x256", G1072x600x256 },
#endif
#ifdef G1072x600x32K
	{"1072x600x32K", G1072x600x32K },
#endif
#ifdef G1072x600x64K
	{"1072x600x64K", G1072x600x64K },
#endif
#ifdef G1072x600x16M
	{"1072x600x16M", G1072x600x16M },
#endif
#ifdef G1072x600x16M32
	{"1072x600x16M32", G1072x600x16M32 },
#endif

#ifdef G1152x864x16
	{"1152x864x16", G1152x864x16 },
#endif
#ifdef G1152x864x256
	{"1152x864x256", G1152x864x256 },
#endif
#ifdef G1152x864x32K
	{"1152x864x32K", G1152x864x32K },
#endif
#ifdef G1152x864x64K
	{"1152x864x64K", G1152x864x64K },
#endif
#ifdef G1152x864x16M
	{"1152x864x16M", G1152x864x16M },
#endif
#ifdef G1152x864x16M32
	{"1152x864x16M32", G1152x864x16M32 },
#endif

#ifdef G1280x720x256
	{"1280x720x256", G1280x720x256 },
#endif
#ifdef G1280x720x32K
	{"1280x720x32K", G1280x720x32K },
#endif
#ifdef G1280x720x64K
	{"1280x720x64K", G1280x720x64K },
#endif
#ifdef G1280x720x16M
	{"1280x720x16M", G1280x720x16M },
#endif
#ifdef G1280x720x16M32
	{"1280x720x16M32", G1280x720x16M32 },
#endif

#ifdef G1280x1024x16
	{"1280x1024x16", G1280x1024x16 },
#endif
#ifdef G1280x1024x256
	{"1280x1024x256", G1280x1024x256 },
#endif
#ifdef G1280x1024x32K
	{"1280x1024x32K", G1280x1024x32K },
#endif
#ifdef G1280x1024x64K
	{"1280x1024x64K", G1280x1024x64K },
#endif
#ifdef G1280x1024x16M
	{"1280x1024x16M", G1280x1024x16M },
#endif
#ifdef G1280x1024x16M32
	{"1280x1024x16M32", G1280x1024x16M32 },
#endif

#ifdef G1360x768x256
	{"1360x768x256", G1360x768x256 },
#endif
#ifdef G1360x768x32K
	{"1360x768x32K", G1360x768x32K },
#endif
#ifdef G1360x768x64K
	{"1360x768x64K", G1360x768x64K },
#endif
#ifdef G1360x768x16M
	{"1360x768x16M", G1360x768x16M },
#endif
#ifdef G1360x768x16M32
	{"1360x768x16M32", G1360x768x16M32 },
#endif

#ifdef G1600x1200x16
	{"1600x1200x16", G1600x1200x16 },
#endif
#ifdef G1600x1200x256
	{"1600x1200x256", G1600x1200x256 },
#endif
#ifdef G1600x1200x32K
	{"1600x1200x32K", G1600x1200x32K },
#endif
#ifdef G1600x1200x64K
	{"1600x1200x64K", G1600x1200x64K },
#endif
#ifdef G1600x1200x16M
	{"1600x1200x16M", G1600x1200x16M },
#endif
#ifdef G1600x1200x16M32
	{"1600x1200x16M32", G1600x1200x16M32 },
#endif

#ifdef G1800x1012x256
	{"1800x1012x256", G1800x1012x256 },
#endif
#ifdef G1800x1012x32K
	{"1800x1012x32K", G1800x1012x32K },
#endif
#ifdef G1800x1012x64K
	{"1800x1012x64K", G1800x1012x64K },
#endif
#ifdef G1800x1012x16M
	{"1800x1012x16M", G1800x1012x16M },
#endif
#ifdef G1800x1012x16M32
	{"1800x1012x16M32", G1800x1012x16M32 },
#endif

#ifdef G1920x1080x256
	{"1920x1080x256", G1920x1080x256 },
#endif
#ifdef G1920x1080x32K
	{"1920x1080x32K", G1920x1080x32K },
#endif
#ifdef G1920x1080x64K
	{"1920x1080x64K", G1920x1080x64K },
#endif
#ifdef G1920x1080x16M
	{"1920x1080x16M", G1920x1080x16M },
#endif
#ifdef G1920x1080x16M32
	{"1920x1080x16M32", G1920x1080x16M32 },
#endif

#ifdef G1920x1440x256
	{"1920x1440x256", G1920x1440x256 },
#endif
#ifdef G1920x1440x32K
	{"1920x1440x32K", G1920x1440x32K },
#endif
#ifdef G1920x1440x64K
	{"1920x1440x64K", G1920x1440x64K },