Hi,
I'm currently try to stream video data to an OpenGL texture.
While using the EGL_DRM_BUFFER_USE_SCANOUT_MESA flag
when creating the memory for the texture makes it at least
a bit easier (only X-tiling instead of Y-tiling on my intel GPU), it
is still tricky to compensate the tiling in the shader. I wonder why
there is no export of the __DRI_IMAGE_USE_LINEAR flag for
calling dri2_create_drm_image_mesa. Attached is a patch that
would do that and works so far without any problem (tested with
an AMD G-Series and Intel Bay- and Cherry-Trail).
Regards,
Volker
--- a/src/egl/drivers/dri2/egl_dri2.c 2017-02-03 19:52:00.278361176 +0100
+++ b/src/egl/drivers/dri2/egl_dri2.c 2017-02-06 16:51:02.831727768 +0100
@@ -2186,7 +2186,8 @@
valid_mask =
EGL_DRM_BUFFER_USE_SCANOUT_MESA |
EGL_DRM_BUFFER_USE_SHARE_MESA |
- EGL_DRM_BUFFER_USE_CURSOR_MESA;
+ EGL_DRM_BUFFER_USE_CURSOR_MESA |
+ EGL_DRM_BUFFER_USE_LINEAR;
if (attrs.DRMBufferUseMESA & ~valid_mask) {
_eglLog(_EGL_WARNING, "bad image use bit 0x%04x",
attrs.DRMBufferUseMESA & ~valid_mask);
@@ -2200,6 +2201,8 @@
dri_use |= __DRI_IMAGE_USE_SCANOUT;
if (attrs.DRMBufferUseMESA & EGL_DRM_BUFFER_USE_CURSOR_MESA)
dri_use |= __DRI_IMAGE_USE_CURSOR;
+ if (attrs.DRMBufferUseMESA & EGL_DRM_BUFFER_USE_LINEAR)
+ dri_use |= __DRI_IMAGE_USE_LINEAR;
dri2_img->dri_image =
dri2_dpy->image->createImage(dri2_dpy->dri_screen,
--- a/include/EGL/eglext.h 2017-02-03 19:52:00.278361176 +0100
+++ b/include/EGL/eglext.h 2017-02-06 16:54:58.436899101 +0100
@@ -780,6 +780,7 @@
#define EGL_DRM_BUFFER_STRIDE_MESA 0x31D4
#define EGL_DRM_BUFFER_USE_SCANOUT_MESA 0x00000001
#define EGL_DRM_BUFFER_USE_SHARE_MESA 0x00000002
+#define EGL_DRM_BUFFER_USE_LINEAR 0x00000008
typedef EGLImageKHR (EGLAPIENTRYP PFNEGLCREATEDRMIMAGEMESAPROC) (EGLDisplay dpy, const EGLint *attrib_list);
typedef EGLBoolean (EGLAPIENTRYP PFNEGLEXPORTDRMIMAGEMESAPROC) (EGLDisplay dpy, EGLImageKHR image, EGLint *name, EGLint *handle, EGLint *stride);
#ifdef EGL_EGLEXT_PROTOTYPES
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