[Qemu-devel] [PATCH 3/3] egl-helpers: add dmabuf modifier support.

[Gerd Hoffmann <kraxel@redhat.com>]

Add modifier parameter to egl_get_fd_for_texture(), to return the used
modifier on dmabuf exports.

Check and use QemuDmaBuf->modifier in egl_dmabuf_import_texture() for
dmabuf imports.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 include/ui/egl-helpers.h |  3 ++-
 ui/egl-helpers.c         | 37 ++++++++++++++++++++++++++-----------
 ui/spice-display.c       |  7 ++++---
 3 files changed, 32 insertions(+), 15 deletions(-)

diff --git a/include/ui/egl-helpers.h b/include/ui/egl-helpers.h
index b976cb872821..d71412779913 100644
--- a/include/ui/egl-helpers.h
+++ b/include/ui/egl-helpers.h
@@ -36,7 +36,8 @@ extern struct gbm_device *qemu_egl_rn_gbm_dev;
 extern EGLContext qemu_egl_rn_ctx;
 
 int egl_rendernode_init(const char *rendernode, DisplayGLMode mode);
-int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc);
+int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
+                           EGLuint64KHR *modifier);
 
 void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf);
 void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf);
diff --git a/ui/egl-helpers.c b/ui/egl-helpers.c
index e90eef8c9c3a..87bfd32e8ddb 100644
--- a/ui/egl-helpers.c
+++ b/ui/egl-helpers.c
@@ -200,7 +200,8 @@ err:
     return -1;
 }
 
-int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc)
+int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
+                           EGLuint64KHR *modifier)
 {
     EGLImageKHR image;
     EGLint num_planes, fd;
@@ -214,7 +215,7 @@ int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc)
     }
 
     eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
-                                  &num_planes, NULL);
+                                  &num_planes, modifier);
     if (num_planes != 1) {
         eglDestroyImageKHR(qemu_egl_display, image);
         return -1;
@@ -228,20 +229,34 @@ int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc)
 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 */
-    };
+    EGLint attrs[64];
+    int i = 0;
 
     if (dmabuf->texture != 0) {
         return;
     }
 
+    attrs[i++] = EGL_WIDTH;
+    attrs[i++] = dmabuf->width;
+    attrs[i++] = EGL_HEIGHT;
+    attrs[i++] = dmabuf->height;
+    attrs[i++] = EGL_LINUX_DRM_FOURCC_EXT;
+    attrs[i++] = dmabuf->fourcc;
+
+    attrs[i++] = EGL_DMA_BUF_PLANE0_FD_EXT;
+    attrs[i++] = dmabuf->fd;
+    attrs[i++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
+    attrs[i++] = dmabuf->stride;
+    attrs[i++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
+    attrs[i++] = 0;
+    if (dmabuf->modifier) {
+        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
+        attrs[i++] = (dmabuf->modifier >>  0) & 0xffffffff;
+        attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
+        attrs[i++] = (dmabuf->modifier >> 32) & 0xffffffff;
+    }
+    attrs[i++] = EGL_NONE;
+
     image = eglCreateImageKHR(qemu_egl_display,
                               EGL_NO_CONTEXT,
                               EGL_LINUX_DMA_BUF_EXT,
diff --git a/ui/spice-display.c b/ui/spice-display.c
index a5e26479a866..104df2302575 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -888,7 +888,8 @@ static void spice_gl_switch(DisplayChangeListener *dcl,
     if (ssd->ds) {
         surface_gl_create_texture(ssd->gls, ssd->ds);
         fd = egl_get_fd_for_texture(ssd->ds->texture,
-                                    &stride, &fourcc);
+                                    &stride, &fourcc,
+                                    NULL);
         if (fd < 0) {
             surface_gl_destroy_texture(ssd->gls, ssd->ds);
             return;
@@ -945,7 +946,7 @@ static void qemu_spice_gl_scanout_texture(DisplayChangeListener *dcl,
     int fd = -1;
 
     assert(tex_id);
-    fd = egl_get_fd_for_texture(tex_id, &stride, &fourcc);
+    fd = egl_get_fd_for_texture(tex_id, &stride, &fourcc, NULL);
     if (fd < 0) {
         fprintf(stderr, "%s: failed to get fd for texture\n", __func__);
         return;
@@ -1063,7 +1064,7 @@ static void qemu_spice_gl_update(DisplayChangeListener *dcl,
                 egl_fb_setup_new_tex(&ssd->blit_fb,
                                      dmabuf->width, dmabuf->height);
                 fd = egl_get_fd_for_texture(ssd->blit_fb.texture,
-                                            &stride, &fourcc);
+                                            &stride, &fourcc, NULL);
                 spice_qxl_gl_scanout(&ssd->qxl, fd,
                                      dmabuf->width, dmabuf->height,
                                      stride, fourcc, false);
-- 
2.18.1