egl_texture_blit() blits a texture, simliar to egl_fb_blit() but by
rendering the texture to the screen instead of using a framebuffer blit.

egl_texture_blend() renders a texture with alpha blending, will be used
to render the cursor to the screen.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Message-id: 20171010135453.6704-6-kraxel@redhat.com

Add helper function to import a dma-buf as opengl texture.
Also add a helper to release the texture again.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Message-id: 20171010135453.6704-5-kraxel@redhat.com

Rename the functions to to say "setup" instead of "create" because they
support being called multiple times on the same egl framebuffer.

Properly delete unused textures, update function interfaces to support
this.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Message-id: 20170927115031.12063-1-kraxel@redhat.com

Add a collection of egl_fb_*() helper functions to manage and use opengl
framebuffers, which is a common pattern in UI code with opengl support.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Message-id: 20170614084149.31314-2-kraxel@redhat.com

When running on gtk we need X11 platform not mesa platform.
Create separate functions for mesa and x11 so we can keep
the egl #ifdef mess local to egl-helpers.c

Fixes: 0ea1523fSigned-off-by: NGerd Hoffmann <kraxel@redhat.com>
Message-id: 20170505104101.30589-4-kraxel@redhat.com

Leftover from the early opengl days.
Unused now, so delete the dead code.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20170505104101.30589-3-kraxel@redhat.com

When multiple GPU are available, picking the first one isn't always the
best choice. Learn to specify a device rendernode.
Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Message-id: 20170212112118.16044-1-marcandre.lureau@redhat.com
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>

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: NGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com>

Drop leftover prototype which sneaked in by mistake
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: NMarc-André Lureau <marcandre.lureau@redhat.com>

Add helper functions to initialize OpenGL using egl.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Reviewed-by: NMax Reitz <mreitz@redhat.com>