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synced 2025-11-03 09:01:42 -05:00
Drop early, obsolete compositor.
This commit is contained in:
Kristian Høgsberg
parent
3620295d17
commit
fcb6cbd5d0
1 changed files with 0 additions and 196 deletions
196
compositor.c
196
compositor.c
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@ -1,196 +0,0 @@
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <i915_drm.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <linux/fb.h>
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#include "wayland.h"
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struct lame_compositor {
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struct wl_compositor base;
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void *fb;
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int32_t width, height, stride;
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int gem_fd;
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};
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struct surface_data {
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uint32_t handle;
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int32_t width, height, stride;
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};
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void notify_surface_create(struct wl_compositor *compositor,
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struct wl_surface *surface)
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{
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struct surface_data *sd;
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sd = malloc(sizeof *sd);
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if (sd == NULL)
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return;
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sd->handle = 0;
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wl_surface_set_data(surface, sd);
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}
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void notify_surface_destroy(struct wl_compositor *compositor,
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struct wl_surface *surface)
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{
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struct lame_compositor *lc = (struct lame_compositor *) compositor;
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struct surface_data *sd;
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struct drm_gem_close close_arg;
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int ret;
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sd = wl_surface_get_data(surface);
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if (sd == NULL || sd->handle == 0)
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return;
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close_arg.handle = sd->handle;
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ret = ioctl(lc->gem_fd, DRM_IOCTL_GEM_CLOSE, &close_arg);
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if (ret != 0) {
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fprintf(stderr, "failed to gem_close handle %d: %m\n", sd->handle);
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}
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free(sd);
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}
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void notify_surface_attach(struct wl_compositor *compositor,
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struct wl_surface *surface, uint32_t name,
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uint32_t width, uint32_t height, uint32_t stride)
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{
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struct lame_compositor *lc = (struct lame_compositor *) compositor;
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struct surface_data *sd;
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struct drm_gem_open open_arg;
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struct drm_gem_close close_arg;
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int ret;
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sd = wl_surface_get_data(surface);
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if (sd == NULL)
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return;
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if (sd->handle != 0) {
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close_arg.handle = sd->handle;
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ret = ioctl(lc->gem_fd, DRM_IOCTL_GEM_CLOSE, &close_arg);
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if (ret != 0) {
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fprintf(stderr, "failed to gem_close name %d: %m\n", name);
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}
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}
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open_arg.name = name;
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ret = ioctl(lc->gem_fd, DRM_IOCTL_GEM_OPEN, &open_arg);
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if (ret != 0) {
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fprintf(stderr, "failed to gem_open name %d, fd=%d: %m\n", name, lc->gem_fd);
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return;
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}
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sd->handle = open_arg.handle;
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sd->width = width;
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sd->height = height;
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sd->stride = stride;
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}
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void notify_surface_map(struct wl_compositor *compositor,
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struct wl_surface *surface, struct wl_map *map)
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{
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struct lame_compositor *lc = (struct lame_compositor *) compositor;
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struct surface_data *sd;
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struct drm_i915_gem_pread pread;
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char *data, *dst;
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uint32_t size;
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int i;
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/* This part is where we actually copy the buffer to screen.
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* Needs to be part of the repaint loop, not in the notify_map
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* handler. */
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sd = wl_surface_get_data(surface);
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if (sd == NULL)
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return;
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size = sd->height * sd->stride;
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data = malloc(size);
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if (data == NULL) {
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fprintf(stderr, "swap buffers malloc failed\n");
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return;
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}
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pread.handle = sd->handle;
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pread.pad = 0;
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pread.offset = 0;
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pread.size = size;
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pread.data_ptr = (long) data;
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if (ioctl(lc->gem_fd, DRM_IOCTL_I915_GEM_PREAD, &pread)) {
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fprintf(stderr, "gem pread failed");
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return;
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}
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dst = lc->fb + lc->stride * map->y + map->x * 4;
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for (i = 0; i < sd->height; i++)
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memcpy(dst + lc->stride * i, data + sd->stride * i, sd->width * 4);
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free(data);
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}
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struct wl_compositor_interface interface = {
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notify_surface_create,
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notify_surface_destroy,
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notify_surface_attach,
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notify_surface_map
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};
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static const char fb_device[] = "/dev/fb";
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static const char gem_device[] = "/dev/dri/card0";
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struct wl_compositor *
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wl_compositor_create(void)
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{
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struct lame_compositor *lc;
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struct fb_fix_screeninfo fix;
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struct fb_var_screeninfo var;
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int fd;
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lc = malloc(sizeof *lc);
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if (lc == NULL)
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return NULL;
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lc->base.interface = &interface;
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fd = open(fb_device, O_RDWR);
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if (fd < 0) {
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fprintf(stderr, "open %s failed: %m\n", fb_device);
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return NULL;
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}
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if (ioctl(fd, FBIOGET_FSCREENINFO, &fix) < 0) {
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fprintf(stderr, "fb get fixed failed\n");
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return NULL;
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}
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if (ioctl(fd, FBIOGET_VSCREENINFO, &var) < 0) {
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fprintf(stderr, "fb get fixed failed\n");
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return NULL;
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}
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lc->stride = fix.line_length;
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lc->width = var.xres;
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lc->height = var.yres;
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lc->fb = mmap(NULL, lc->stride * lc->height,
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PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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close(fd);
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if (lc->fb == MAP_FAILED) {
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fprintf(stderr, "fb map failed\n");
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return NULL;
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}
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lc->gem_fd = open(gem_device, O_RDWR);
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if (lc->gem_fd < 0) {
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fprintf(stderr, "failed to open drm device\n");
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return NULL;
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}
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return &lc->base;
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}
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