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