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https://github.com/RaySollium99/picodrive.git
synced 2025-09-05 15:27:46 -04:00
allow multiple fbdevs
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@881 be3aeb3a-fb24-0410-a615-afba39da0efa
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notaz
parent
ab61cff780
commit
b9fe67c67c
2 changed files with 91 additions and 73 deletions
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@ -1,4 +1,5 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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@ -9,139 +10,154 @@
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#include <linux/fb.h>
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#include <linux/matroxfb.h>
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#include "../common/emu.h"
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#include "fbdev.h"
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#define FBDEV_MAX_BUFFERS 3
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static int fbdev = -1;
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static void *fbdev_mem = MAP_FAILED;
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static int fbdev_mem_size;
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static struct fb_var_screeninfo fbvar_old;
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static struct fb_var_screeninfo fbvar_new;
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static int fbdev_buffer_write;
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struct vout_fbdev {
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int fd;
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void *mem;
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size_t mem_size;
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struct fb_var_screeninfo fbvar_old;
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struct fb_var_screeninfo fbvar_new;
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int buffer_write;
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void *buffers[FBDEV_MAX_BUFFERS];
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int buffer_count;
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};
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void *fbdev_buffers[FBDEV_MAX_BUFFERS];
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int fbdev_buffer_count;
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void plat_video_flip(void)
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void *vout_fbdev_flip(struct vout_fbdev *fbdev)
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{
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int draw_buf;
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if (fbdev_buffer_count < 2)
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return;
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if (fbdev->buffer_count < 2)
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return fbdev->mem;
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draw_buf = fbdev_buffer_write;
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fbdev_buffer_write++;
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if (fbdev_buffer_write >= fbdev_buffer_count)
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fbdev_buffer_write = 0;
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draw_buf = fbdev->buffer_write;
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fbdev->buffer_write++;
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if (fbdev->buffer_write >= fbdev->buffer_count)
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fbdev->buffer_write = 0;
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fbvar_new.yoffset = fbvar_old.yres * draw_buf;
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g_screen_ptr = fbdev_buffers[fbdev_buffer_write];
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fbdev->fbvar_new.yoffset = fbdev->fbvar_old.yres * draw_buf;
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ioctl(fbdev, FBIOPAN_DISPLAY, &fbvar_new);
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ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
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return fbdev->buffers[fbdev->buffer_write];
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}
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void plat_video_wait_vsync(void)
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void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev)
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{
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int arg = 0;
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ioctl(fbdev, FBIO_WAITFORVSYNC, &arg);
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ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &arg);
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}
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int vout_fbdev_init(int *w, int *h)
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void vout_fbdev_clear(struct vout_fbdev *fbdev)
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{
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static const char *fbdev_name = "/dev/fb0";
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memset(fbdev->mem, 0, fbdev->mem_size);
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}
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struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int no_dblbuf)
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{
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struct vout_fbdev *fbdev;
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int i, ret;
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fbdev = open(fbdev_name, O_RDWR);
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if (fbdev == -1) {
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fbdev = calloc(1, sizeof(*fbdev));
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if (fbdev == NULL)
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return NULL;
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fbdev->fd = open(fbdev_name, O_RDWR);
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if (fbdev->fd == -1) {
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fprintf(stderr, "%s: ", fbdev_name);
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perror("open");
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return -1;
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goto fail_open;
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}
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ret = ioctl(fbdev, FBIOGET_VSCREENINFO, &fbvar_old);
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ret = ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->fbvar_old);
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if (ret == -1) {
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perror("FBIOGET_VSCREENINFO ioctl");
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goto fail;
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}
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fbvar_new = fbvar_old;
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printf("%s: %ix%i@%d\n", fbdev_name, fbvar_old.xres, fbvar_old.yres, fbvar_old.bits_per_pixel);
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*w = fbvar_old.xres;
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*h = fbvar_old.yres;
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fbdev_buffer_count = FBDEV_MAX_BUFFERS; // be optimistic
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fbdev->fbvar_new = fbdev->fbvar_old;
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printf("%s: %ix%i@%d\n", fbdev_name, fbdev->fbvar_old.xres, fbdev->fbvar_old.yres,
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fbdev->fbvar_old.bits_per_pixel);
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*w = fbdev->fbvar_old.xres;
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*h = fbdev->fbvar_old.yres;
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fbdev->buffer_count = FBDEV_MAX_BUFFERS; // be optimistic
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if (no_dblbuf)
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fbdev->buffer_count = 1;
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if (fbvar_new.bits_per_pixel != 16) {
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if (fbdev->fbvar_new.bits_per_pixel != 16) {
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printf(" switching to 16bpp\n");
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fbvar_new.bits_per_pixel = 16;
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ret = ioctl(fbdev, FBIOPUT_VSCREENINFO, &fbvar_new);
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fbdev->fbvar_new.bits_per_pixel = 16;
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ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
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if (ret == -1) {
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perror("FBIOPUT_VSCREENINFO ioctl");
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goto fail;
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}
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}
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if (fbvar_new.yres_virtual < fbvar_old.yres * fbdev_buffer_count) {
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fbvar_new.yres_virtual = fbvar_old.yres * fbdev_buffer_count;
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ret = ioctl(fbdev, FBIOPUT_VSCREENINFO, &fbvar_new);
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if (fbdev->fbvar_new.yres_virtual < fbdev->fbvar_old.yres * fbdev->buffer_count) {
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fbdev->fbvar_new.yres_virtual = fbdev->fbvar_old.yres * fbdev->buffer_count;
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ret = ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_new);
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if (ret == -1) {
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fbdev_buffer_count = 1;
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fbdev->buffer_count = 1;
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fprintf(stderr, "Warning: failed to increase virtual resolution, "
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"doublebuffering disabled\n");
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}
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}
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fbdev_mem_size = *w * *h * 2 * fbdev_buffer_count;
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fbdev_mem = mmap(0, fbdev_mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev, 0);
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if (fbdev_mem == MAP_FAILED && fbdev_buffer_count > 1) {
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fprintf(stderr, "Warning: can't map %d bytes, doublebuffering disabled\n", fbdev_mem_size);
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fbdev_mem_size = *w * *h * 2;
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fbdev_buffer_count = 1;
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fbdev_mem = mmap(0, fbdev_mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev, 0);
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fbdev->mem_size = *w * *h * 2 * fbdev->buffer_count;
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fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
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if (fbdev->mem == MAP_FAILED && fbdev->buffer_count > 1) {
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fprintf(stderr, "Warning: can't map %zd bytes, doublebuffering disabled\n", fbdev->mem_size);
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fbdev->mem_size = *w * *h * 2;
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fbdev->buffer_count = 1;
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fbdev->mem = mmap(0, fbdev->mem_size, PROT_WRITE|PROT_READ, MAP_SHARED, fbdev->fd, 0);
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}
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if (fbdev_mem == MAP_FAILED) {
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if (fbdev->mem == MAP_FAILED) {
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perror("mmap framebuffer");
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goto fail;
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}
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memset(fbdev_mem, 0, fbdev_mem_size);
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for (i = 0; i < fbdev_buffer_count; i++)
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fbdev_buffers[i] = (char *)fbdev_mem + i * *w * *h * 2;
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g_screen_ptr = fbdev_buffers[0];
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memset(fbdev->mem, 0, fbdev->mem_size);
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for (i = 0; i < fbdev->buffer_count; i++)
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fbdev->buffers[i] = (char *)fbdev->mem + i * *w * *h * 2;
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// some checks
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ret = 0;
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ret = ioctl(fbdev, FBIO_WAITFORVSYNC, &ret);
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ret = ioctl(fbdev->fd, FBIO_WAITFORVSYNC, &ret);
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if (ret != 0)
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fprintf(stderr, "Warning: vsync doesn't seem to be supported\n");
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if (fbdev_buffer_count > 1) {
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fbdev_buffer_write = 0;
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fbvar_new.yoffset = fbvar_old.yres * (fbdev_buffer_count - 1);
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ret = ioctl(fbdev, FBIOPAN_DISPLAY, &fbvar_new);
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if (fbdev->buffer_count > 1) {
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fbdev->buffer_write = 0;
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fbdev->fbvar_new.yoffset = fbdev->fbvar_old.yres * (fbdev->buffer_count - 1);
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ret = ioctl(fbdev->fd, FBIOPAN_DISPLAY, &fbdev->fbvar_new);
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if (ret != 0) {
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fbdev_buffer_count = 1;
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fbdev->buffer_count = 1;
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fprintf(stderr, "Warning: can't pan display, doublebuffering disabled\n");
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}
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}
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printf("fbdev initialized.\n");
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return 0;
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return fbdev;
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fail:
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close(fbdev);
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return -1;
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close(fbdev->fd);
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fail_open:
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free(fbdev);
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return NULL;
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}
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void vout_fbdev_finish(void)
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void vout_fbdev_finish(struct vout_fbdev *fbdev)
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{
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ioctl(fbdev, FBIOPUT_VSCREENINFO, &fbvar_old);
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if (fbdev_mem != MAP_FAILED)
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munmap(fbdev_mem, fbdev_mem_size);
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if (fbdev >= 0)
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close(fbdev);
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fbdev_mem = NULL;
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fbdev = -1;
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ioctl(fbdev->fd, FBIOPUT_VSCREENINFO, &fbdev->fbvar_old);
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if (fbdev->mem != MAP_FAILED)
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munmap(fbdev->mem, fbdev->mem_size);
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if (fbdev->fd >= 0)
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close(fbdev->fd);
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fbdev->mem = NULL;
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fbdev->fd = -1;
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free(fbdev);
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}
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#if 0
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@ -1,5 +1,7 @@
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int vout_fbdev_init(int *w, int *h);
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void vout_fbdev_finish(void);
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struct vout_fbdev;
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extern void *fbdev_buffers[];
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extern int fbdev_buffer_count;
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struct vout_fbdev *vout_fbdev_init(const char *fbdev_name, int *w, int *h, int no_dblbuf);
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void *vout_fbdev_flip(struct vout_fbdev *fbdev);
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void vout_fbdev_wait_vsync(struct vout_fbdev *fbdev);
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void vout_fbdev_clear(struct vout_fbdev *fbdev);
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void vout_fbdev_finish(struct vout_fbdev *fbdev);
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