Hi
On Thu, Feb 18, 2016 at 10:26 AM, Gerd Hoffmann <kraxel@xxxxxxxxxx> wrote:
> 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@xxxxxxxxxx>
> ---
> include/ui/egl-helpers.h | 13 +++++
> ui/egl-helpers.c | 129 +++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 142 insertions(+)
>
> diff --git a/include/ui/egl-helpers.h b/include/ui/egl-helpers.h
> index 8c84398..03fcf4b 100644
> --- a/include/ui/egl-helpers.h
> +++ b/include/ui/egl-helpers.h
> @@ -3,10 +3,23 @@
>
> #include <epoxy/gl.h>
> #include <epoxy/egl.h>
> +#include <gbm.h>
>
> extern EGLDisplay *qemu_egl_display;
> extern EGLConfig qemu_egl_config;
>
> +#ifdef CONFIG_OPENGL_DMABUF
> +
> +extern int qemu_egl_rn_fd;
> +extern struct gbm_device *qemu_egl_rn_gbm_dev;
> +extern EGLContext qemu_egl_rn_ctx;
> +
> +int qemu_egl_rendernode_open(void);
> +int egl_rendernode_init(void);
> +int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc);
> +
> +#endif
> +
> EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win);
>
> int qemu_egl_init_dpy(EGLNativeDisplayType dpy, bool gles, bool debug);
> 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;
> --
> 1.8.3.1
>
Reviewed-by: Marc-André Lureau <marcandre.lureau@xxxxxxxxxx>
--
Marc-André Lureau
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