+++ /dev/null
-/*
- * (C) GraÅžvydas "notaz" Ignotas, 2009-2010
- *
- * This work is licensed under the terms of any of these licenses
- * (at your option):
- * - GNU GPL, version 2 or later.
- * - 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"
-
-#define PFX "fbdev: "
-
-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 *mem_saved;
- size_t mem_saved_size;
-};
-
-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);
-}
-
-/* it is recommended to call vout_fbdev_clear() before this */
-void *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 ||
- 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->buffer_count != buffer_cnt)
- {
- if (fbdev->fbvar_new.bits_per_pixel != bpp ||
- w != fbdev->fbvar_new.xres || h != fbdev->fbvar_new.yres)
- printf(PFX "switching to %dx%d@%d\n", w, h, bpp);
-
- fbdev->fbvar_new.xres = w;
- fbdev->fbvar_new.yres = h;
- fbdev->fbvar_new.xres_virtual = w_total;
- fbdev->fbvar_new.yres_virtual = h_total * buffer_cnt;
- fbdev->fbvar_new.xoffset = left_border;
- fbdev->fbvar_new.yoffset = top_border;
- fbdev->fbvar_new.bits_per_pixel = bpp;
- fbdev->fbvar_new.nonstd = 0; // can set YUV here on omapfb
- fbdev->buffer_count = buffer_cnt;
- fbdev->buffer_write = buffer_cnt > 1 ? 1 : 0;
-
- // seems to help a bit to avoid glitches
- vout_fbdev_wait_vsync(fbdev);
-
- ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
- if (ret == -1) {
- // retry with no multibuffering
- fbdev->fbvar_new.yres_virtual = h_total;
- ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
- if (ret == -1) {
- perror(PFX "FBIOPUT_VSCREENINFO ioctl");
- return NULL;
- }
- fbdev->buffer_count = 1;
- fbdev->buffer_write = 0;
- fprintf(stderr, PFX "Warning: failed to increase virtual resolution, "
- "multibuffering 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)
- goto out;
-
- 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, PFX "Warning: can't map %zd bytes, doublebuffering disabled\n", mem_size);
- fbdev->buffer_count = 1;
- fbdev->buffer_write = 0;
- 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(PFX "mmap framebuffer");
- return NULL;
- }
-
- fbdev->mem_size = mem_size;
-
-out:
- return (char *)fbdev->mem + fbdev->fb_size * fbdev->buffer_write;
-}
-
-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;
- void *pret;
- 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, PFX "%s: ", fbdev_name);
- perror("open");
- goto fail_open;
- }
-
- ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old);
- if (ret == -1) {
- perror(PFX "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;
-
- pret = vout_fbdev_resize(fbdev, req_w, req_h, bpp, 0, 0, 0, 0, buffer_cnt);
- if (pret == NULL)
- goto fail;
-
- printf(PFX "%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, PFX "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, PFX "Warning: can't pan display, doublebuffering disabled\n");
- }
- }
-
- printf("fbdev initialized.\n");
- return fbdev;
-
-fail:
- close(fbdev->fd);
-fail_open:
- free(fbdev);
- return NULL;
-}
-
-static void vout_fbdev_release(struct vout_fbdev *fbdev)
-{
- ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old);
- if (fbdev->mem != MAP_FAILED)
- munmap(fbdev->mem, fbdev->mem_size);
- fbdev->mem = NULL;
-}
-
-int vout_fbdev_save(struct vout_fbdev *fbdev)
-{
- void *tmp;
-
- if (fbdev == NULL || fbdev->mem == NULL || fbdev->mem == MAP_FAILED) {
- fprintf(stderr, PFX "bad args for save\n");
- return -1;
- }
-
- if (fbdev->mem_saved_size < fbdev->mem_size) {
- tmp = realloc(fbdev->mem_saved, fbdev->mem_size);
- if (tmp == NULL)
- return -1;
- fbdev->mem_saved = tmp;
- }
- memcpy(fbdev->mem_saved, fbdev->mem, fbdev->mem_size);
- fbdev->mem_saved_size = fbdev->mem_size;
-
- vout_fbdev_release(fbdev);
- return 0;
-}
-
-int vout_fbdev_restore(struct vout_fbdev *fbdev)
-{
- int ret;
-
- if (fbdev == NULL || fbdev->mem != NULL) {
- fprintf(stderr, PFX "bad args/state for restore\n");
- return -1;
- }
-
- fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
- if (fbdev->mem == MAP_FAILED) {
- perror(PFX "restore: memory restore failed");
- return -1;
- }
- memcpy(fbdev->mem, fbdev->mem_saved, fbdev->mem_size);
-
- ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
- if (ret == -1) {
- perror(PFX "restore: FBIOPUT_VSCREENINFO");
- return -1;
- }
-
- return 0;
-}
-
-void vout_fbdev_finish(struct vout_fbdev *fbdev)
-{
- vout_fbdev_release(fbdev);
- if (fbdev->fd >= 0)
- close(fbdev->fd);
- fbdev->fd = -1;
- free(fbdev);
-}
-
notaz.gp2x.de / pcsx_rearmed.git / blobdiff