1 files changed, 305 insertions, 0 deletions
diff --git a/drivers.c b/drivers.c
new file mode 100644
index 0000000..8679b99
--- /dev/null
+++ b/drivers.c
@@ -0,0 +1,305 @@
+/* drivers.c
+ * (c) 2002 Mikulas Patocka
+ * This file is a part of the Links program, released under GPL
+ */
+
+#include "cfg.h"
+
+#ifdef G
+
+#include "links.h"
+
+int F = 0;
+
+struct graphics_driver *drv = NULL;
+
+#ifdef GRDRV_X
+extern struct graphics_driver x_driver;
+#endif
+#ifdef GRDRV_SVGALIB
+extern struct graphics_driver svga_driver;
+#endif
+#ifdef GRDRV_FB
+extern struct graphics_driver fb_driver;
+#endif
+#ifdef GRDRV_DIRECTFB
+extern struct graphics_driver directfb_driver;
+#endif
+#ifdef GRDRV_PMSHELL
+extern struct graphics_driver pmshell_driver;
+#endif
+#ifdef GRDRV_ATHEOS
+extern struct graphics_driver atheos_driver;
+#endif
+#ifdef GRDRV_SDL
+extern struct graphics_driver sdl_driver;
+#endif
+
+/*
+ * On SPAD you must test first svgalib and then X (because X test is slow).
+ * On other systems you must test first X and then svgalib (because svgalib
+ *	would work in X too and it's undesirable).
+ */
+
+static struct graphics_driver *graphics_drivers[] = {
+#ifdef GRDRV_PMSHELL
+	&pmshell_driver,
+#endif
+#ifdef GRDRV_ATHEOS
+	&atheos_driver,
+#endif
+#ifndef SPAD
+#ifdef GRDRV_X
+	&x_driver,
+#endif
+#endif
+#ifdef GRDRV_FB
+	/* use FB before DirectFB because DirectFB has bugs */
+	&fb_driver,
+#endif
+#ifdef GRDRV_DIRECTFB
+	&directfb_driver,
+#endif
+#ifdef GRDRV_SVGALIB
+	&svga_driver,
+#endif
+#ifdef SPAD
+#ifdef GRDRV_X
+	&x_driver,
+#endif
+#endif
+#ifdef GRDRV_SDL
+	&sdl_driver,
+#endif
+	NULL
+};
+
+int dummy_block(struct graphics_device *dev)
+{
+	return 0;
+}
+
+int dummy_unblock(struct graphics_device *dev)
+{
+	return 0;
+}
+
+#if 0
+static unsigned char *list_graphics_drivers(void)
+{ 
+	unsigned char *d = init_str();
+	int l = 0;
+	struct graphics_driver **gd;
+	for (gd = graphics_drivers; *gd; gd++) {
+		if (l) add_to_str(&d, &l, " ");
+		add_to_str(&d, &l, (*gd)->name);
+	}
+	return d;
+}
+#endif
+
+/* Driver je jednorazovy argument, kterej se preda grafickymu driveru, nikde se dal
+ * neuklada.  Param se skladuje v default_driver param a uklada se do konfiguraku. Pred
+ * ukoncenim grafickeho driveru se nastavi default_driver_param podle
+ * drv->get_driver_param.
+ */
+static unsigned char *init_graphics_driver(struct graphics_driver *gd, unsigned char *param, unsigned char *display)
+{
+	unsigned char *r;
+	unsigned char *p = param;
+	struct driver_param *dp=get_driver_param(gd->name);
+	if (!param || !*param) p = dp->param;
+	gd->codepage=dp->codepage;
+	gd->shell=mem_calloc(MAX_STR_LEN);
+	if (dp->shell) safe_strncpy(gd->shell,dp->shell,MAX_STR_LEN);
+	r = gd->init_driver(p,display);
+	if (r) mem_free(gd->shell), gd->shell = NULL;
+	return r;
+}
+
+
+void add_graphics_drivers(unsigned char **s, int *l)
+{
+	struct graphics_driver **gd;
+	for (gd = graphics_drivers; *gd; gd++) {
+		if (gd != graphics_drivers) add_to_str(s, l, ", ");
+		add_to_str(s, l, (*gd)->name);
+	}
+}
+
+unsigned char *init_graphics(unsigned char *driver, unsigned char *param, unsigned char *display)
+{
+	unsigned char *s = init_str();
+	int l = 0;
+	struct graphics_driver **gd;
+#if defined(GRDRV_PMSHELL) && defined(GRDRV_X)
+	if (is_xterm()) {
+		static unsigned char swapped = 0;
+		if (!swapped) {
+			for (gd = graphics_drivers; *gd; gd++) {
+				if (*gd == &pmshell_driver) *gd = &x_driver;
+				else if (*gd == &x_driver) *gd = &pmshell_driver;
+			}
+			swapped = 1;
+		}
+	}
+#endif
+	for (gd = graphics_drivers; *gd; gd++) {
+		if (!driver || !*driver || !strcasecmp((*gd)->name, driver)) {
+			unsigned char *r;
+			if ((!driver || !*driver) && (*gd)->flags & GD_NOAUTO) continue;
+			if (!(r = init_graphics_driver(*gd, param, display))) {
+				mem_free(s);
+				drv = *gd;
+				F = 1;
+				return NULL;
+			}
+			if (!l) {
+				if (!driver || !*driver) add_to_str(&s, &l, "Could not initialize any graphics driver. Tried the following drivers:\n");
+				else add_to_str(&s, &l, "Could not initialize graphics driver ");
+			}
+			add_to_str(&s, &l, (*gd)->name);
+			add_to_str(&s, &l, ":\n");
+			add_to_str(&s, &l, r);
+			mem_free(r);
+		}
+	}
+	if (!l) {
+		add_to_str(&s, &l, "Unknown graphics driver ");
+		if (driver) add_to_str(&s, &l, driver);
+		add_to_str(&s, &l, ".\nThe following graphics drivers are supported:\n");
+		add_graphics_drivers(&s, &l);
+		add_to_str(&s, &l, "\n");
+	}
+	return s;
+}
+
+void shutdown_graphics(void)
+{
+	if (drv)
+	{
+		if (drv->shell) mem_free(drv->shell);
+		drv->shutdown_driver();
+	}
+}
+
+void update_driver_param(void)
+{
+	if (drv)
+	{
+		struct driver_param *dp=get_driver_param(drv->name);
+		dp->codepage=drv->codepage;
+		if (dp->param) mem_free(dp->param);
+		dp->param=stracpy(drv->get_driver_param());
+		if (dp->shell) mem_free(dp->shell);
+		dp->shell=stracpy(drv->shell);
+		dp->nosave = 0;
+	}
+}
+
+#if defined(GRDRV_SVGALIB)|defined(GRDRV_FB)
+
+static struct graphics_driver *virtual_device_driver;
+struct graphics_device **virtual_devices;
+int n_virtual_devices = 0;
+struct graphics_device *current_virtual_device;
+
+static int virtual_device_timer;
+
+int init_virtual_devices(struct graphics_driver *drv, int n)
+{
+	if (n_virtual_devices) {
+		internal("init_virtual_devices: already initialized");
+		return -1;
+	}
+	if ((unsigned)n > MAXINT / sizeof(struct graphics_device *)) overalloc();
+	virtual_devices = mem_calloc(n * sizeof(struct graphics_device *));
+	n_virtual_devices = n;
+	virtual_device_driver = drv;
+	virtual_device_timer = -1;
+	current_virtual_device = NULL;
+	return 0;
+}
+
+struct graphics_device *init_virtual_device(void)
+{
+	int i;
+	for (i = 0; i < n_virtual_devices; i++) if (!virtual_devices[i]) {
+		struct graphics_device *dev;
+		dev = mem_calloc(sizeof(struct graphics_device));
+		dev->size.x2 = virtual_device_driver->x;
+		dev->size.y2 = virtual_device_driver->y;
+		current_virtual_device = virtual_devices[i] = dev;
+		virtual_device_driver->set_clip_area(dev, &dev->size);
+		return dev;
+	}
+	return NULL;
+}
+
+static void virtual_device_timer_fn(void *p)
+{
+	virtual_device_timer = -1;
+	if (current_virtual_device && current_virtual_device->redraw_handler) {
+		drv->set_clip_area(current_virtual_device, &current_virtual_device->size);
+		current_virtual_device->redraw_handler(current_virtual_device, &current_virtual_device->size);
+	}
+}
+
+void switch_virtual_device(int i)
+{
+	if (i == VD_NEXT) {
+		int j;
+		int t = 0;
+		for (j = 0; j < n_virtual_devices * 2; j++)
+			if (virtual_devices[j % n_virtual_devices] == current_virtual_device) t = 1;
+			else if (virtual_devices[j % n_virtual_devices] && t) {
+				current_virtual_device = virtual_devices[j % n_virtual_devices];
+				goto ok_switch;
+			}
+		return;
+	}
+	if (i < 0 || i >= n_virtual_devices || !virtual_devices[i]) return;
+	current_virtual_device = virtual_devices[i];
+	ok_switch:
+	if (virtual_device_timer == -1)
+		virtual_device_timer = install_timer(0, virtual_device_timer_fn, NULL);
+}
+
+void shutdown_virtual_device(struct graphics_device *dev)
+{
+	int i;
+	for (i = 0; i < n_virtual_devices; i++) if (virtual_devices[i] == dev) {
+		virtual_devices[i] = NULL;
+		mem_free(dev);
+		if (current_virtual_device != dev) return;
+		for (; i < n_virtual_devices; i++) if (virtual_devices[i]) {
+			switch_virtual_device(i);
+			return;
+		}
+		for (i = 0; i < n_virtual_devices; i++) if (virtual_devices[i]) {
+			switch_virtual_device(i);
+			return;
+		}
+		current_virtual_device = NULL;
+		return;
+	}
+	mem_free(dev);
+	/*internal("shutdown_virtual_device: device not initialized");*/
+}
+
+void shutdown_virtual_devices(void)
+{
+	int i;
+	if (!n_virtual_devices) {
+		internal("shutdown_virtual_devices: already shut down");
+		return;
+	}
+	for (i = 0; i < n_virtual_devices; i++) if (virtual_devices[i]) internal("shutdown_virtual_devices: virtual device %d is still active", i);
+	mem_free(virtual_devices);
+	n_virtual_devices = 0;
+	if (virtual_device_timer != -1) kill_timer(virtual_device_timer), virtual_device_timer = -1;
+}
+
+#endif
+
+#endif