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/*
* Copyright © 2014 NVIDIA 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.
*/
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
#include <drm_fourcc.h>
#include "xf86drm.h"
#include "libkms-test.h"
struct kms_framebuffer *kms_framebuffer_create(struct kms_device *device,
unsigned int width,
unsigned int height,
uint32_t format)
{
uint32_t handles[4], pitches[4], offsets[4];
struct drm_mode_create_dumb args;
struct kms_framebuffer *fb;
int err;
fb = calloc(1, sizeof(*fb));
if (!fb)
return NULL;
fb->device = device;
fb->width = width;
fb->height = height;
fb->format = format;
memset(&args, 0, sizeof(args));
args.width = width;
args.height = height;
switch (format) {
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_ABGR8888:
case DRM_FORMAT_RGBA8888:
args.bpp = 32;
break;
case DRM_FORMAT_ARGB1555:
case DRM_FORMAT_BGRA5551:
case DRM_FORMAT_RGB565:
args.bpp = 16;
break;
default:
free(fb);
return NULL;
}
err = drmIoctl(device->fd, DRM_IOCTL_MODE_CREATE_DUMB, &args);
if (err < 0) {
free(fb);
return NULL;
}
fb->handle = args.handle;
fb->pitch = args.pitch;
fb->size = args.size;
handles[0] = fb->handle;
pitches[0] = fb->pitch;
offsets[0] = 0;
err = drmModeAddFB2(device->fd, width, height, format, handles,
pitches, offsets, &fb->id, 0);
if (err < 0) {
kms_framebuffer_free(fb);
return NULL;
}
return fb;
}
void kms_framebuffer_free(struct kms_framebuffer *fb)
{
struct kms_device *device = fb->device;
struct drm_mode_destroy_dumb args;
int err;
if (fb->id) {
err = drmModeRmFB(device->fd, fb->id);
if (err < 0) {
/* not much we can do now */
}
}
memset(&args, 0, sizeof(args));
args.handle = fb->handle;
err = drmIoctl(device->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &args);
if (err < 0) {
/* not much we can do now */
}
free(fb);
}
int kms_framebuffer_map(struct kms_framebuffer *fb, void **ptrp)
{
struct kms_device *device = fb->device;
struct drm_mode_map_dumb args;
void *ptr;
int err;
if (fb->ptr) {
*ptrp = fb->ptr;
return 0;
}
memset(&args, 0, sizeof(args));
args.handle = fb->handle;
err = drmIoctl(device->fd, DRM_IOCTL_MODE_MAP_DUMB, &args);
if (err < 0)
return -errno;
ptr = mmap(0, fb->size, PROT_READ | PROT_WRITE, MAP_SHARED,
device->fd, args.offset);
if (ptr == MAP_FAILED)
return -errno;
*ptrp = fb->ptr = ptr;
return 0;
}
void kms_framebuffer_unmap(struct kms_framebuffer *fb)
{
if (fb->ptr) {
munmap(fb->ptr, fb->size);
fb->ptr = NULL;
}
}
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