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/*
* Copyright © 2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*/
/*
* Read back all the KMS framebuffers attached to the CRTC and record as PNG.
*/
#define _GNU_SOURCE
#include <stdint.h>
#include <sys/types.h>
#include <sys/mman.h>
#include <errno.h>
#include <xf86drmMode.h>
#include <i915_drm.h>
#include <cairo.h>
#include "intel_io.h"
#include "drmtest.h"
int main(int argc, char **argv)
{
drmModeResPtr res;
int fd, n;
fd = drmOpen("i915", NULL);
if (fd < 0)
return ENOENT;
res = drmModeGetResources(fd);
if (res == NULL)
return ENOMEM;
for (n = 0; n < res->count_crtcs; n++) {
struct drm_gem_open open_arg;
struct drm_gem_flink flink;
drmModeCrtcPtr crtc;
drmModeFBPtr fb;
crtc = drmModeGetCrtc(fd, res->crtcs[n]);
if (crtc == NULL)
continue;
fb = drmModeGetFB(fd, crtc->buffer_id);
drmModeFreeCrtc(crtc);
if (fb == NULL)
continue;
flink.handle = fb->handle;
if (drmIoctl(fd, DRM_IOCTL_GEM_FLINK, &flink)) {
drmModeFreeFB(fb);
continue;
}
open_arg.name = flink.name;
if (drmIoctl(fd, DRM_IOCTL_GEM_OPEN, &open_arg) == 0) {
struct drm_i915_gem_mmap_gtt mmap_arg;
void *ptr;
mmap_arg.handle = open_arg.handle;
if (drmIoctl(fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_arg) == 0 &&
(ptr = mmap(0, open_arg.size, PROT_READ, MAP_SHARED, fd, mmap_arg.offset)) != (void *)-1) {
cairo_surface_t *surface;
cairo_format_t format;
char name[80];
snprintf(name, sizeof(name), "fb-%d.png", fb->fb_id);
switch (fb->depth) {
case 16: format = CAIRO_FORMAT_RGB16_565; break;
case 24: format = CAIRO_FORMAT_RGB24; break;
case 30: format = CAIRO_FORMAT_RGB30; break;
case 32: format = CAIRO_FORMAT_ARGB32; break;
default: format = CAIRO_FORMAT_INVALID; break;
}
surface = cairo_image_surface_create_for_data(ptr, format,
fb->width, fb->height, fb->pitch);
cairo_surface_write_to_png(surface, name);
cairo_surface_destroy(surface);
munmap(ptr, open_arg.size);
}
drmIoctl(fd, DRM_IOCTL_GEM_CLOSE, &open_arg.handle);
}
drmModeFreeFB(fb);
}
return 0;
}
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