Commit 86c0522c authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

egl-helpers: add dmabuf import support 



Add helper function to import a dma-buf as opengl texture.
Also add a helper to release the texture again.

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
Message-id: 20171010135453.6704-5-kraxel@redhat.com
parent 2e1d70b9

include/ui/egl-helpers.h

+3 −0
Original line number Diff line number Diff line
@@ -33,6 +33,9 @@ extern EGLContext qemu_egl_rn_ctx; 
int egl_rendernode_init(const char *rendernode);

int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc);



void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf);

void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf);



#endif



EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win);

ui/egl-helpers.c

+46 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include <dirent.h>



#include "qemu/error-report.h"

#include "ui/console.h"

#include "ui/egl-helpers.h"



EGLDisplay *qemu_egl_display;
@@ -241,6 +242,51 @@ int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc) 
    return fd;

}



void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)

{

    EGLImageKHR image = EGL_NO_IMAGE_KHR;

    EGLint attrs[] = {

        EGL_DMA_BUF_PLANE0_FD_EXT,      dmabuf->fd,

        EGL_DMA_BUF_PLANE0_PITCH_EXT,   dmabuf->stride,

        EGL_DMA_BUF_PLANE0_OFFSET_EXT,  0,

        EGL_WIDTH,                      dmabuf->width,

        EGL_HEIGHT,                     dmabuf->height,

        EGL_LINUX_DRM_FOURCC_EXT,       dmabuf->fourcc,

        EGL_NONE, /* end of list */

    };



    if (dmabuf->texture != 0) {

        return;

    }



    image = eglCreateImageKHR(qemu_egl_display,

                              EGL_NO_CONTEXT,

                              EGL_LINUX_DMA_BUF_EXT,

                              NULL, attrs);

    if (image == EGL_NO_IMAGE_KHR) {

        error_report("eglCreateImageKHR failed");

        return;

    }



    glGenTextures(1, &dmabuf->texture);

    glBindTexture(GL_TEXTURE_2D, dmabuf->texture);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);



    glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);

    eglDestroyImageKHR(qemu_egl_display, image);

}



void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf)

{

    if (dmabuf->texture == 0) {

        return;

    }



    glDeleteTextures(1, &dmabuf->texture);

    dmabuf->texture = 0;

}



#endif /* CONFIG_OPENGL_DMABUF */



/* ---------------------------------------------------------------------- */