[pcsx_rearmed.git] / frontend / linux / fbdev.c

/*
 * (C) Gražvydas "notaz" Ignotas, 2009-2010
 *
 * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
 * See the COPYING file in the top-level directory.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <unistd.h>
#include <linux/fb.h>
#include <linux/matroxfb.h>

#include "fbdev.h"

struct vout_fbdev {
	int	fd;
	void	*mem;
	size_t	mem_size;
	struct	fb_var_screeninfo fbvar_old;
	struct	fb_var_screeninfo fbvar_new;
	int	buffer_write;
	int	fb_size;
	int	buffer_count;
	int	top_border, bottom_border;
};

void *vout_fbdev_flip(struct vout_fbdev *fbdev)
{
	int draw_buf;

	if (fbdev->buffer_count < 2)
		return fbdev->mem;

	draw_buf = fbdev->buffer_write;
	fbdev->buffer_write++;
	if (fbdev->buffer_write >= fbdev->buffer_count)
		fbdev->buffer_write = 0;

	fbdev->fbvar_new.yoffset = 
		(fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf +
		fbdev->top_border;

	ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);

	return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
}

void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
{
	int arg = 0;
	ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg);
}

int vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp,
		      int left_border, int right_border, int top_border, int bottom_border, int buffer_cnt)
{
	int w_total = left_border + w + right_border;
	int h_total = top_border + h + bottom_border;
	size_t mem_size;
	int ret;

	// unblank to be sure the mode is really accepted
	ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK);

	if (fbdev->fbvar_new.bits_per_pixel != bpp ||
			w != fbdev->fbvar_new.xres ||
			h != fbdev->fbvar_new.yres ||
			w_total != fbdev->fbvar_new.xres_virtual ||
			h_total > fbdev->fbvar_new.yres_virtual ||
			left_border != fbdev->fbvar_new.xoffset) {
		fbdev->fbvar_new.xres = w;
		fbdev->fbvar_new.yres = h;
		fbdev->fbvar_new.xres_virtual = w_total;
		fbdev->fbvar_new.yres_virtual = h_total;
		fbdev->fbvar_new.xoffset = left_border;
		fbdev->fbvar_new.bits_per_pixel = bpp;
		printf(" switching to %dx%d@%d\n", w, h, bpp);
		ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
		if (ret == -1) {
			perror("FBIOPUT_VSCREENINFO ioctl");
			return -1;
		}
	}

	fbdev->buffer_count = buffer_cnt;

	if (fbdev->fbvar_new.yres_virtual < h_total * fbdev->buffer_count) {
		fbdev->fbvar_new.yres_virtual = h_total * fbdev->buffer_count;
		ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
		if (ret == -1) {
			fbdev->buffer_count = 1;
			fprintf(stderr, "Warning: failed to increase virtual resolution, "
					"doublebuffering disabled\n");
		}
	}

	fbdev->fb_size = w_total * h_total * bpp / 8;
	fbdev->top_border = top_border;
	fbdev->bottom_border = bottom_border;

	mem_size = fbdev->fb_size * fbdev->buffer_count;
	if (fbdev->mem_size >= mem_size)
		return 0;

	if (fbdev->mem != NULL)
		munmap(fbdev->mem, fbdev->mem_size);

	fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
	if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) {
		fprintf(stderr, "Warning: can't map %zd bytes, doublebuffering disabled\n", fbdev->mem_size);
		fbdev->buffer_count = 1;
		mem_size = fbdev->fb_size;
		fbdev->mem = mmap(0, mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
	}
	if (fbdev->mem == MAP_FAILED) {
		fbdev->mem = NULL;
		fbdev->mem_size = 0;
		perror("mmap framebuffer");
		return -1;
	}

	fbdev->mem_size = mem_size;
	return 0;
}

void vout_fbdev_clear(struct vout_fbdev *fbdev)
{
	memset(fbdev->mem, 0, fbdev->mem_size);
}

void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count)
{
	int stride = fbdev->fbvar_new.xres_virtual * fbdev->fbvar_new.bits_per_pixel / 8;
	int i;

	if (y + count > fbdev->top_border + fbdev->fbvar_new.yres)
		count = fbdev->top_border + fbdev->fbvar_new.yres - y;

	if (y >= 0 && count > 0)
		for (i = 0; i < fbdev->buffer_count; i++)
			memset((char *)fbdev->mem + fbdev->fb_size * i + y * stride, 0, stride * count);
}

int vout_fbdev_get_fd(struct vout_fbdev *fbdev)
{
	return fbdev->fd;
}

struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int bpp, int buffer_cnt)
{
	struct vout_fbdev *fbdev;
	int req_w, req_h;
	int ret;

	fbdev = calloc(1, sizeof(*fbdev));
	if (fbdev == NULL)
		return NULL;

	fbdev->fd = open(fbdev_name, O_RDWR);
	if (fbdev->fd == -1) {
		fprintf(stderr, "%s: ", fbdev_name);
		perror("open");
		goto fail_open;
	}

	ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old);
	if (ret == -1) {
		perror("FBIOGET_VSCREENINFO ioctl");
		goto fail;
	}

	fbdev->fbvar_new = fbdev->fbvar_old;

	req_w = fbdev->fbvar_new.xres;
	if (*w != 0)
		req_w = *w;
	req_h = fbdev->fbvar_new.yres;
	if (*h != 0)
		req_h = *h;

	ret = vout_fbdev_resize(fbdev, req_w, req_h, bpp, 0, 0, 0, 0, buffer_cnt);
	if (ret != 0)
		goto fail;

	printf("%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres, fbdev->fbvar_new.yres,
		fbdev->fbvar_new.bits_per_pixel);
	*w = fbdev->fbvar_new.xres;
	*h = fbdev->fbvar_new.yres;

	memset(fbdev->mem, 0, fbdev->mem_size);

	// some checks
	ret = 0;
	ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret);
	if (ret != 0)
		fprintf(stderr, "Warning: vsync doesn't seem to be supported\n");

	if (fbdev->buffer_count > 1) {
		fbdev->buffer_write = 0;
		fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1);
		ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
		if (ret != 0) {
			fbdev->buffer_count = 1;
			fprintf(stderr, "Warning: can't pan display, doublebuffering disabled\n");
		}
	}

	printf("fbdev initialized.\n");
	return fbdev;

fail:
	close(fbdev->fd);
fail_open:
	free(fbdev);
	return NULL;
}

void vout_fbdev_finish(struct vout_fbdev *fbdev)
{
	ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old);
	if (fbdev->mem != MAP_FAILED)
		munmap(fbdev->mem, fbdev->mem_size);
	if (fbdev->fd >= 0)
		close(fbdev->fd);
	fbdev->mem = NULL;
	fbdev->fd = -1;
	free(fbdev);
}
Commit	Line	Data
b60f2812	1	/*
	2	* (C) Gražvydas "notaz" Ignotas, 2009-2010
	3	*
	4	* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
	5	* See the COPYING file in the top-level directory.
	6	*/
	7
	8	#include <stdio.h>
	9	#include <stdlib.h>
	10	#include <string.h>
	11	#include <sys/types.h>
	12	#include <sys/stat.h>
	13	#include <fcntl.h>
	14	#include <sys/ioctl.h>
	15	#include <sys/mman.h>
	16	#include <unistd.h>
	17	#include <linux/fb.h>
	18	#include <linux/matroxfb.h>
	19
	20	#include "fbdev.h"
	21
b60f2812	22	struct vout_fbdev {
	23	int fd;
	24	void *mem;
	25	size_t mem_size;
	26	struct fb_var_screeninfo fbvar_old;
	27	struct fb_var_screeninfo fbvar_new;
	28	int buffer_write;
	29	int fb_size;
	30	int buffer_count;
	31	int top_border, bottom_border;
	32	};
	33
	34	void vout_fbdev_flip(struct vout_fbdev fbdev)
	35	{
	36	int draw_buf;
	37
	38	if (fbdev->buffer_count < 2)
	39	return fbdev->mem;
	40
	41	draw_buf = fbdev->buffer_write;
	42	fbdev->buffer_write++;
	43	if (fbdev->buffer_write >= fbdev->buffer_count)
	44	fbdev->buffer_write = 0;
	45
	46	fbdev->fbvar_new.yoffset =
	47	(fbdev->top_border + fbdev->fbvar_new.yres + fbdev->bottom_border) * draw_buf +
	48	fbdev->top_border;
	49
	50	ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
	51
	52	return (char )fbdev->mem + fbdev->fb_size fbdev->buffer_write;
	53	}
	54
	55	void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
	56	{
	57	int arg = 0;
	58	ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg);
	59	}
	60
1972732a	61	int vout_fbdev_resize(struct vout_fbdev *fbdev, int w, int h, int bpp,
1972732a	62	int left_border, int right_border, int top_border, int bottom_border, int buffer_cnt)
b60f2812	63	{
	64	int w_total = left_border + w + right_border;
	65	int h_total = top_border + h + bottom_border;
	66	size_t mem_size;
	67	int ret;
	68
	69	// unblank to be sure the mode is really accepted
	70	ioctl(fbdev->fd, FBIOBLANK, FB_BLANK_UNBLANK);
	71
1972732a	72	if (fbdev->fbvar_new.bits_per_pixel != bpp \|\|
b60f2812	73	w != fbdev->fbvar_new.xres \|\|
	74	h != fbdev->fbvar_new.yres \|\|
	75	w_total != fbdev->fbvar_new.xres_virtual \|\|
	76	h_total > fbdev->fbvar_new.yres_virtual \|\|
	77	left_border != fbdev->fbvar_new.xoffset) {
	78	fbdev->fbvar_new.xres = w;
	79	fbdev->fbvar_new.yres = h;
	80	fbdev->fbvar_new.xres_virtual = w_total;
	81	fbdev->fbvar_new.yres_virtual = h_total;
	82	fbdev->fbvar_new.xoffset = left_border;
1972732a	83	fbdev->fbvar_new.bits_per_pixel = bpp;
1972732a	84	printf(" switching to %dx%d@%d\n", w, h, bpp);
b60f2812	85	ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
	86	if (ret == -1) {
	87	perror("FBIOPUT_VSCREENINFO ioctl");
	88	return -1;
	89	}
	90	}
	91
1972732a	92	fbdev->buffer_count = buffer_cnt;
b60f2812	93
	94	if (fbdev->fbvar_new.yres_virtual < h_total * fbdev->buffer_count) {
	95	fbdev->fbvar_new.yres_virtual = h_total * fbdev->buffer_count;
	96	ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
	97	if (ret == -1) {
	98	fbdev->buffer_count = 1;
	99	fprintf(stderr, "Warning: failed to increase virtual resolution, "
	100	"doublebuffering disabled\n");
	101	}
	102	}
	103
1972732a	104	fbdev->fb_size = w_total * h_total * bpp / 8;
b60f2812	105	fbdev->top_border = top_border;
	106	fbdev->bottom_border = bottom_border;
	107
	108	mem_size = fbdev->fb_size * fbdev->buffer_count;
	109	if (fbdev->mem_size >= mem_size)
	110	return 0;
	111
	112	if (fbdev->mem != NULL)
	113	munmap(fbdev->mem, fbdev->mem_size);
	114
	115	fbdev->mem = mmap(0, mem_size, PROT_WRITE\|PROT_READ, MAP_SHARED, fbdev->fd, 0);
	116	if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) {
	117	fprintf(stderr, "Warning: can't map %zd bytes, doublebuffering disabled\n", fbdev->mem_size);
	118	fbdev->buffer_count = 1;
	119	mem_size = fbdev->fb_size;
	120	fbdev->mem = mmap(0, mem_size, PROT_WRITE\|PROT_READ, MAP_SHARED, fbdev->fd, 0);
	121	}
	122	if (fbdev->mem == MAP_FAILED) {
	123	fbdev->mem = NULL;
	124	fbdev->mem_size = 0;
	125	perror("mmap framebuffer");
	126	return -1;
	127	}
	128
	129	fbdev->mem_size = mem_size;
	130	return 0;
	131	}
	132
	133	void vout_fbdev_clear(struct vout_fbdev *fbdev)
	134	{
	135	memset(fbdev->mem, 0, fbdev->mem_size);
	136	}
	137
	138	void vout_fbdev_clear_lines(struct vout_fbdev *fbdev, int y, int count)
	139	{
	140	int stride = fbdev->fbvar_new.xres_virtual * fbdev->fbvar_new.bits_per_pixel / 8;
	141	int i;
	142
	143	if (y + count > fbdev->top_border + fbdev->fbvar_new.yres)
	144	count = fbdev->top_border + fbdev->fbvar_new.yres - y;
	145
	146	if (y >= 0 && count > 0)
	147	for (i = 0; i < fbdev->buffer_count; i++)
	148	memset((char )fbdev->mem + fbdev->fb_size i + y * stride, 0, stride * count);
	149	}
	150
	151	int vout_fbdev_get_fd(struct vout_fbdev *fbdev)
	152	{
	153	return fbdev->fd;
	154	}
	155
1972732a	156	struct vout_fbdev vout_fbdev_init(const char fbdev_name, int w, int h, int bpp, int buffer_cnt)
b60f2812	157	{
	158	struct vout_fbdev *fbdev;
	159	int req_w, req_h;
	160	int ret;
	161
	162	fbdev = calloc(1, sizeof(*fbdev));
	163	if (fbdev == NULL)
	164	return NULL;
	165
	166	fbdev->fd = open(fbdev_name, O_RDWR);
	167	if (fbdev->fd == -1) {
	168	fprintf(stderr, "%s: ", fbdev_name);
	169	perror("open");
	170	goto fail_open;
	171	}
	172
	173	ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old);
	174	if (ret == -1) {
	175	perror("FBIOGET_VSCREENINFO ioctl");
	176	goto fail;
	177	}
	178
	179	fbdev->fbvar_new = fbdev->fbvar_old;
	180
	181	req_w = fbdev->fbvar_new.xres;
	182	if (*w != 0)
	183	req_w = *w;
	184	req_h = fbdev->fbvar_new.yres;
	185	if (*h != 0)
	186	req_h = *h;
	187
1972732a	188	ret = vout_fbdev_resize(fbdev, req_w, req_h, bpp, 0, 0, 0, 0, buffer_cnt);
b60f2812	189	if (ret != 0)
	190	goto fail;
	191
	192	printf("%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_new.xres, fbdev->fbvar_new.yres,
	193	fbdev->fbvar_new.bits_per_pixel);
	194	*w = fbdev->fbvar_new.xres;
	195	*h = fbdev->fbvar_new.yres;
	196
	197	memset(fbdev->mem, 0, fbdev->mem_size);
	198
	199	// some checks
	200	ret = 0;
	201	ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret);
	202	if (ret != 0)
	203	fprintf(stderr, "Warning: vsync doesn't seem to be supported\n");
	204
	205	if (fbdev->buffer_count > 1) {
	206	fbdev->buffer_write = 0;
	207	fbdev->fbvar_new.yoffset = fbdev->fbvar_new.yres * (fbdev->buffer_count - 1);
	208	ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
	209	if (ret != 0) {
	210	fbdev->buffer_count = 1;
	211	fprintf(stderr, "Warning: can't pan display, doublebuffering disabled\n");
	212	}
	213	}
	214
	215	printf("fbdev initialized.\n");
	216	return fbdev;
	217
	218	fail:
	219	close(fbdev->fd);
	220	fail_open:
	221	free(fbdev);
	222	return NULL;
	223	}
	224
	225	void vout_fbdev_finish(struct vout_fbdev *fbdev)
	226	{
	227	ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old);
	228	if (fbdev->mem != MAP_FAILED)
	229	munmap(fbdev->mem, fbdev->mem_size);
	230	if (fbdev->fd >= 0)
	231	close(fbdev->fd);
	232	fbdev->mem = NULL;
	233	fbdev->fd = -1;
	234	free(fbdev);
	235	}
	236