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Add initial linux_dmabuf protocol support

Browse source 
Tested with

    ./weston-simple-dmabuf-drm
    ./weston-simple-dmabuf-drm --import-immediate=1
    ./weston-simple-dmabuf-drm --y-inverted=1
    (and combinations)

Supports only single plane XRGB dmabufs for now.
This commit is contained in:
Guido Günther 2018-02-23 18:45:16 +01:00
parent 2d0db16942
commit 14cdb6153f
12 changed files with 787 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

135
render/egl.c
View file

@ -167,6 +167,12 @@ bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *remote_display,
check_egl_ext(egl->egl_exts_str, "EGL_EXT_swap_buffers_with_damage") ||
check_egl_ext(egl->egl_exts_str, "EGL_KHR_swap_buffers_with_damage");
egl->egl_exts.dmabuf_import =
check_egl_ext(egl->egl_exts_str, "EGL_EXT_image_dma_buf_import");
egl->egl_exts.dmabuf_import_modifiers =
check_egl_ext(egl->egl_exts_str, "EGL_EXT_image_dma_buf_import_modifiers")
&& eglQueryDmaBufFormatsEXT && eglQueryDmaBufModifiersEXT;
return true;
error:
@ -299,3 +305,132 @@ bool wlr_egl_swap_buffers(struct wlr_egl *egl, EGLSurface surface,
}
return true;
}
EGLImage wlr_egl_create_image_from_dmabuf(struct wlr_egl *egl,
struct wlr_dmabuf_buffer_attribs *attributes) {
int atti = 0;
EGLint attribs[20];
attribs[atti++] = EGL_WIDTH;
attribs[atti++] = attributes->width;
attribs[atti++] = EGL_HEIGHT;
attribs[atti++] = attributes->height;
attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
attribs[atti++] = attributes->format;
bool has_modifier = false;
if (attributes->modifier[0] != DRM_FORMAT_MOD_INVALID) {
if (!egl->egl_exts.dmabuf_import_modifiers) {
return NULL;
}
has_modifier = true;
}
/* TODO: YUV planes have up four planes but we only support a
single EGLImage for now */
if (attributes->n_planes > 1) {
return NULL;
}
attribs[atti++] = EGL_DMA_BUF_PLANE0_FD_EXT;
attribs[atti++] = attributes->fd[0];
attribs[atti++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
attribs[atti++] = attributes->offset[0];
attribs[atti++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
attribs[atti++] = attributes->stride[0];
if (has_modifier) {
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
attribs[atti++] = attributes->modifier[0] & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
attribs[atti++] = attributes->modifier[0] >> 32;
}
attribs[atti++] = EGL_NONE;
return eglCreateImageKHR(egl->display, EGL_NO_CONTEXT,
EGL_LINUX_DMA_BUF_EXT, NULL, attribs);
}
#ifndef DRM_FORMAT_BIG_ENDIAN
# define DRM_FORMAT_BIG_ENDIAN 0x80000000
#endif
bool wlr_egl_check_import_dmabuf(struct wlr_egl *egl,
struct wlr_dmabuf_buffer *dmabuf) {
switch (dmabuf->attributes.format & ~DRM_FORMAT_BIG_ENDIAN) {
/* YUV based formats not yet supported */
case WL_SHM_FORMAT_YUYV:
case WL_SHM_FORMAT_YVYU:
case WL_SHM_FORMAT_UYVY:
case WL_SHM_FORMAT_VYUY:
case WL_SHM_FORMAT_AYUV:
return false;
default:
break;
}
EGLImage egl_image = wlr_egl_create_image_from_dmabuf(egl,
&dmabuf->attributes);
if (egl_image) {
/* We can import the image, good. No need to keep it
since wlr_texture_upload_dmabuf will import it again */
wlr_egl_destroy_image(egl, egl_image);
return true;
}
/* TODO: import yuv dmabufs */
return false;
}
int wlr_egl_get_dmabuf_formats(struct wlr_egl *egl,
int **formats) {
if (!egl->egl_exts.dmabuf_import ||
!egl->egl_exts.dmabuf_import_modifiers) {
wlr_log(L_ERROR, "dmabuf extension not present");
return -1;
}
EGLint num;
if (!eglQueryDmaBufFormatsEXT(egl->display, 0, NULL, &num)) {
wlr_log(L_ERROR, "failed to query number of dmabuf formats");
return -1;
}
*formats = calloc(num, sizeof(int));
if (*formats == NULL) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
return -1;
}
if (!eglQueryDmaBufFormatsEXT(egl->display, num, *formats, &num)) {
wlr_log(L_ERROR, "failed to query dmabuf format");
free(*formats);
return -1;
}
return num;
}
int wlr_egl_get_dmabuf_modifiers(struct wlr_egl *egl,
int format, uint64_t **modifiers) {
if (!egl->egl_exts.dmabuf_import ||
!egl->egl_exts.dmabuf_import_modifiers) {
wlr_log(L_ERROR, "dmabuf extension not present");
return -1;
}
EGLint num;
if (!eglQueryDmaBufModifiersEXT(egl->display, format, 0,
NULL, NULL, &num)) {
wlr_log(L_ERROR, "failed to query dmabuf number of modifiers");
return -1;
}
*modifiers = calloc(num, sizeof(uint64_t));
if (*modifiers == NULL) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
return -1;
}
if (!eglQueryDmaBufModifiersEXT(egl->display, format, num,
*modifiers, NULL, &num)) {
wlr_log(L_ERROR, "failed to query dmabuf modifiers");
free(*modifiers);
return -1;
}
return num;
}