154 lines
3.4 KiB
C
154 lines
3.4 KiB
C
/*
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* Copyright © 2014 NVIDIA Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include <errno.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <drm_fourcc.h>
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#include "xf86drm.h"
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#include "libkms-test.h"
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struct kms_framebuffer *kms_framebuffer_create(struct kms_device *device,
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unsigned int width,
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unsigned int height,
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uint32_t format)
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{
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uint32_t handles[4], pitches[4], offsets[4];
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struct drm_mode_create_dumb args;
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struct kms_framebuffer *fb;
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int err;
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fb = calloc(1, sizeof(*fb));
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if (!fb)
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return NULL;
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fb->device = device;
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fb->width = width;
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fb->height = height;
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fb->format = format;
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memset(&args, 0, sizeof(args));
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args.width = width;
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args.height = height;
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switch (format) {
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case DRM_FORMAT_XRGB8888:
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case DRM_FORMAT_XBGR8888:
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case DRM_FORMAT_RGBA8888:
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args.bpp = 32;
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break;
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default:
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free(fb);
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return NULL;
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}
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err = drmIoctl(device->fd, DRM_IOCTL_MODE_CREATE_DUMB, &args);
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if (err < 0) {
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free(fb);
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return NULL;
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}
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fb->handle = args.handle;
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fb->pitch = args.pitch;
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fb->size = args.size;
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handles[0] = fb->handle;
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pitches[0] = fb->pitch;
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offsets[0] = 0;
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err = drmModeAddFB2(device->fd, width, height, format, handles,
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pitches, offsets, &fb->id, 0);
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if (err < 0) {
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kms_framebuffer_free(fb);
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return NULL;
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}
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return fb;
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}
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void kms_framebuffer_free(struct kms_framebuffer *fb)
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{
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struct kms_device *device = fb->device;
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struct drm_mode_destroy_dumb args;
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int err;
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if (fb->id) {
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err = drmModeRmFB(device->fd, fb->id);
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if (err < 0) {
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/* not much we can do now */
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}
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}
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memset(&args, 0, sizeof(args));
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args.handle = fb->handle;
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err = drmIoctl(device->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &args);
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if (err < 0) {
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/* not much we can do now */
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}
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free(fb);
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}
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int kms_framebuffer_map(struct kms_framebuffer *fb, void **ptrp)
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{
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struct kms_device *device = fb->device;
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struct drm_mode_map_dumb args;
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void *ptr;
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int err;
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if (fb->ptr) {
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*ptrp = fb->ptr;
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return 0;
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}
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memset(&args, 0, sizeof(args));
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args.handle = fb->handle;
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err = drmIoctl(device->fd, DRM_IOCTL_MODE_MAP_DUMB, &args);
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if (err < 0)
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return -errno;
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ptr = mmap(0, fb->size, PROT_READ | PROT_WRITE, MAP_SHARED,
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device->fd, args.offset);
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if (ptr == MAP_FAILED)
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return -errno;
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*ptrp = fb->ptr = ptr;
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return 0;
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}
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void kms_framebuffer_unmap(struct kms_framebuffer *fb)
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{
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if (fb->ptr) {
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munmap(fb->ptr, fb->size);
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fb->ptr = NULL;
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}
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}
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