weston/background.c
2008-11-07 15:54:48 -05:00

143 lines
3.3 KiB
C

#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <i915_drm.h>
#include <sys/ioctl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <glib.h>
#include "wayland-client.h"
#include "wayland-glib.h"
static const char gem_device[] = "/dev/dri/card0";
static const char socket_name[] = "\0wayland";
static uint8_t *convert_to_argb(GdkPixbuf *pixbuf, int *new_stride)
{
uint8_t *data, *row, *src;
uint32_t *pixel;
int width, height, stride, channels, i, j;
width = gdk_pixbuf_get_width(pixbuf);
height = gdk_pixbuf_get_height(pixbuf);
stride = gdk_pixbuf_get_rowstride(pixbuf);
row = gdk_pixbuf_get_pixels(pixbuf);
channels = gdk_pixbuf_get_n_channels(pixbuf);
data = malloc(height * width * 4);
if (data == NULL) {
fprintf(stderr, "out of memory\n");
return NULL;
}
for (i = 0; i < height; i++) {
for (j = 0; j < width; j++) {
src = &row[i * stride + j * channels];
pixel = (uint32_t *) &data[i * width * 4 + j * 4];
*pixel = 0xff000000 | (src[0] << 16) | (src[1] << 8) | src[2];
}
}
*new_stride = width * 4;
return data;
}
static uint32_t name_pixbuf(int fd, GdkPixbuf *pixbuf)
{
struct drm_i915_gem_create create;
struct drm_gem_flink flink;
struct drm_i915_gem_pwrite pwrite;
int32_t width, height, stride;
void *data;
width = gdk_pixbuf_get_width(pixbuf);
height = gdk_pixbuf_get_height(pixbuf);
data = convert_to_argb(pixbuf, &stride);
memset(&create, 0, sizeof(create));
create.size = height * stride;
if (ioctl(fd, DRM_IOCTL_I915_GEM_CREATE, &create) != 0) {
fprintf(stderr, "gem create failed: %m\n");
return 0;
}
pwrite.handle = create.handle;
pwrite.offset = 0;
pwrite.size = height * stride;
pwrite.data_ptr = (uint64_t) (uintptr_t) data;
if (ioctl(fd, DRM_IOCTL_I915_GEM_PWRITE, &pwrite) < 0) {
fprintf(stderr, "gem pwrite failed: %m\n");
return 0;
}
flink.handle = create.handle;
if (ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink) != 0) {
fprintf(stderr, "gem flink failed: %m\n");
return 0;
}
#if 0
/* We need to hold on to the handle until the server has received
* the attach request... we probably need a confirmation event.
* I guess the breadcrumb idea will suffice. */
struct drm_gem_close close;
close.handle = create.handle;
if (ioctl(fd, DRM_IOCTL_GEM_CLOSE, &close) < 0) {
fprintf(stderr, "gem close failed: %m\n");
return 0;
}
#endif
return flink.name;
}
int main(int argc, char *argv[])
{
GdkPixbuf *image;
GError *error = NULL;
struct wl_display *display;
struct wl_surface *surface;
int fd, width, height, stride;
uint32_t name;
GMainLoop *loop;
GSource *source;
fd = open(gem_device, O_RDWR);
if (fd < 0) {
fprintf(stderr, "drm open failed: %m\n");
return -1;
}
display = wl_display_create(socket_name);
if (display == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
loop = g_main_loop_new(NULL, FALSE);
source = wayland_source_new(display);
g_source_attach(source, NULL);
surface = wl_display_create_surface(display);
g_type_init();
image = gdk_pixbuf_new_from_file (argv[1], &error);
name = name_pixbuf(fd, image);
width = gdk_pixbuf_get_width(image);
height = gdk_pixbuf_get_height(image);
stride = gdk_pixbuf_get_rowstride(image);
wl_surface_attach(surface, name, width, height, width * 4);
wl_surface_map(surface, 0, 0, width, height);
g_main_loop_run(loop);
return 0;
}