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/*
* Copyright (c) 2017 Rob Clark <rclark@redhat.com>
*
* 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, sub license,
* 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 NON-INFRINGEMENT. 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.
*/
#include <assert.h>
#include <errno.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "common.h"
#include "drm-common.h"
static struct drm drm;
static int offscreen_run(const struct gbm *gbm, const struct egl *egl, const struct cube *cube)
{
struct gbm_bo *bo = NULL;
uint32_t i = 0;
start_fpscntrs();
while (i < drm.count) {
unsigned frame = i;
struct gbm_bo *next_bo;
if (!gbm->surface) {
glBindFramebuffer(GL_FRAMEBUFFER, egl->fbs[frame % NUM_BUFFERS].fb);
}
cube->draw(i++);
if (gbm->surface) {
eglSwapBuffers(egl->display, egl->surface);
next_bo = gbm_surface_lock_front_buffer(gbm->surface);
} else {
glFinish();
next_bo = gbm->bos[frame % NUM_BUFFERS];
}
if (!next_bo) {
printf("Failed to lock frontbuffer\n");
return -1;
}
end_fpscntrs();
if (drm.pixels) {
char pngname[64];
glReadPixels(0, 0, drm.mode->hdisplay, drm.mode->vdisplay, GL_RGBA, GL_UNSIGNED_BYTE, drm.pixels);
size_t r = snprintf(pngname, sizeof(pngname), "kmscube-%03d.png", frame);
assert(r < sizeof(pngname));
write_png_file(pngname, drm.mode->hdisplay, drm.mode->vdisplay, drm.pixels);
}
/* release last buffer to render on again: */
if (bo && gbm->surface)
gbm_surface_release_buffer(gbm->surface, bo);
bo = next_bo;
}
finish_fpscntrs();
return 0;
}
const struct drm * init_drm_offscreen(const char *device, const char *mode_str, unsigned int count, bool write)
{
int ret;
ret = init_drm_render(&drm, device, mode_str, count, write);
if (ret)
return NULL;
drm.run = offscreen_run;
return &drm;
}
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