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author | Gerd Hoffmann <kraxel@redhat.com> | 2015-10-12 12:03:49 +0200 |
---|---|---|
committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:45:30 -0600 |
commit | 2a300165ac8477ad2762455a3110839f88762181 (patch) | |
tree | 1ef69bb4cf4ecdc6a038f8c46f9ae545cbe6bcb7 /ui/egl-helpers.c | |
parent | c918c51a88d279b71914aab30f5f11f6ed7eff14 (diff) | |
download | hqemu-2a300165ac8477ad2762455a3110839f88762181.zip hqemu-2a300165ac8477ad2762455a3110839f88762181.tar.gz |
egl-helpers: add functions for render nodes and dma-buf passing
Adds helpers to open a drm render node and create a opengl
context for it. Also add a helper to export a texture as
dma-buf.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Diffstat (limited to 'ui/egl-helpers.c')
-rw-r--r-- | ui/egl-helpers.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c index 4c83834..54be44c 100644 --- a/ui/egl-helpers.c +++ b/ui/egl-helpers.c @@ -1,6 +1,8 @@ #include "qemu/osdep.h" #include <glob.h> +#include <dirent.h> +#include "config-host.h" #include "ui/egl-helpers.h" EGLDisplay *qemu_egl_display; @@ -20,6 +22,133 @@ static int egl_debug; /* ---------------------------------------------------------------------- */ +#ifdef CONFIG_OPENGL_DMABUF + +int qemu_egl_rn_fd; +struct gbm_device *qemu_egl_rn_gbm_dev; +EGLContext qemu_egl_rn_ctx; + +int qemu_egl_rendernode_open(void) +{ + DIR *dir; + struct dirent *e; + int r, fd; + char *p; + + dir = opendir("/dev/dri"); + if (!dir) { + return -1; + } + + fd = -1; + while ((e = readdir(dir))) { + if (e->d_type != DT_CHR) { + continue; + } + + if (strncmp(e->d_name, "renderD", 7)) { + continue; + } + + r = asprintf(&p, "/dev/dri/%s", e->d_name); + if (r < 0) { + return -1; + } + + r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK); + if (r < 0) { + free(p); + continue; + } + fd = r; + free(p); + break; + } + + closedir(dir); + if (fd < 0) { + return -1; + } + return fd; +} + +int egl_rendernode_init(void) +{ + qemu_egl_rn_fd = -1; + + qemu_egl_rn_fd = qemu_egl_rendernode_open(); + if (qemu_egl_rn_fd == -1) { + fprintf(stderr, "egl: no drm render node available\n"); + goto err; + } + + qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd); + if (!qemu_egl_rn_gbm_dev) { + fprintf(stderr, "egl: gbm_create_device failed\n"); + goto err; + } + + qemu_egl_init_dpy((EGLNativeDisplayType)qemu_egl_rn_gbm_dev, false, false); + + if (!epoxy_has_egl_extension(qemu_egl_display, + "EGL_KHR_surfaceless_context")) { + fprintf(stderr, "egl: EGL_KHR_surfaceless_context not supported\n"); + goto err; + } + if (!epoxy_has_egl_extension(qemu_egl_display, + "EGL_MESA_image_dma_buf_export")) { + fprintf(stderr, "egl: EGL_MESA_image_dma_buf_export not supported\n"); + goto err; + } + + qemu_egl_rn_ctx = qemu_egl_init_ctx(); + if (!qemu_egl_rn_ctx) { + fprintf(stderr, "egl: egl_init_ctx failed\n"); + goto err; + } + + return 0; + +err: + if (qemu_egl_rn_gbm_dev) { + gbm_device_destroy(qemu_egl_rn_gbm_dev); + } + if (qemu_egl_rn_fd != -1) { + close(qemu_egl_rn_fd); + } + + return -1; +} + +int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc) +{ + EGLImageKHR image; + EGLint num_planes, fd; + + image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(), + EGL_GL_TEXTURE_2D_KHR, + (EGLClientBuffer)(unsigned long)tex_id, + NULL); + if (!image) { + return -1; + } + + eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc, + &num_planes, NULL); + if (num_planes != 1) { + eglDestroyImageKHR(qemu_egl_display, image); + return -1; + } + eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL); + eglDestroyImageKHR(qemu_egl_display, image); + + return fd; +} + +#endif /* CONFIG_OPENGL_DMABUF */ + +/* ---------------------------------------------------------------------- */ + EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win) { EGLSurface esurface; |