X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;ds=sidebyside;f=docs%2Fegl.html;h=5b750070ca1ff4e9503240066546a177c1aabf8b;hb=dd898c3e89597f841a55272be1ccc07345500f60;hp=ee9bf355d7c5f50e229b63425e4942d8a23366bc;hpb=b2ddb93ff3b8c88682634ccdef247967e31fab84;p=mesa.git diff --git a/docs/egl.html b/docs/egl.html index ee9bf355d7c..5b750070ca1 100644 --- a/docs/egl.html +++ b/docs/egl.html @@ -19,10 +19,7 @@ API entry points and helper functions for use by the drivers. Drivers are dynamically loaded by the main library and most of the EGL API calls are directly dispatched to the drivers.
-The driver in use decides the window system to support. For drivers that -support hardware rendering, there are usually multiple drivers supporting the -same window system. Each one of of them supports a certain range of graphics -cards.
+The driver in use decides the window system to support.
- $ ./configure --enable-gles2 --enable-openvg --enable-gallium-nouveau + $ ./configure --enable-gles1 --enable-gles2 \ + --with-dri-drivers=... \ + --with-gallium-drivers=...-
The main library and OpenGL is enabled by default. The first option above -enables OpenGL ES 2.x. The second option enables -OpenVG.
+The main library and OpenGL is enabled by default. The first two options +above enables OpenGL ES 1.x and 2.x. The last two +options enables the listed classic and and Gallium drivers respectively.
@@ -45,8 +44,8 @@ enables OpenGL ES 2.x. The second option enablesIn the given example, it will build and install libEGL
,
-libGL
, libGLESv1_CM
, libGLESv2
,
-libOpenVG
, and one or more EGL drivers.
libGL
, libGLESv1_CM
, libGLESv2
, and one
+or more EGL drivers.
${libdir}/egl
.
+--enable-gallium-egl
+
+Enable the optional egl_gallium
driver.
--with-egl-platforms
List the platforms (window systems) to support. Its argument is a comma @@ -86,16 +91,16 @@ select the right platforms automatically.
--enable-gles1
and --enable-gles2
-These options enable OpenGL ES support in OpenGL. The result is -one big library that supports multiple APIs.
+These options enable OpenGL ES support in OpenGL. The result is one big +internal library that supports multiple APIs.
--enable-gles-overlay
+--enable-shared-glapi
-This option enables OpenGL ES as separate libraries. This is an alternative
-approach to enable OpenGL ES. It is only supported by
-egl_gallium
.
By default, libGL
has its own copy of libglapi
.
+This options makes libGL
use the shared libglapi
. This
+is required if applications mix OpenGL and OpenGL ES.
--enable-gallium-egl
-
-Explicitly enable or disable egl_gallium
.
This variable is usually set to test an uninstalled build. For example, one +may set
+ ++ $ export LD_LIBRARY_PATH=$mesa/lib + $ export EGL_DRIVERS_PATH=$mesa/lib/egl ++ +
to test a build without installation
+EGL_DRIVER
-This variable specifies a full path to an EGL driver and it forces the -specified EGL driver to be loaded. It comes in handy when one wants to test a -specific driver. This variable is ignored for setuid/setgid binaries.
+This variable specifies a full path to or the name of an EGL driver. It +forces the specified EGL driver to be loaded. It comes in handy when one wants +to test a specific driver. This variable is ignored for setuid/setgid +binaries.
egl_dri2
This driver supports both x11
and drm
platforms.
-It functions as a DRI2 driver loader. For x11
support, it talks
-to the X server directly using (XCB-)DRI2 protocol.
x11
support, it talks to
+the X server directly using (XCB-)DRI2 protocol.
+
+This driver can share DRI drivers with libGL
.
This driver comes with its own hardware drivers
+(pipe_<hw>
) and client API modules
+(st_<api>
).
egl_glx
@@ -202,6 +218,20 @@ is not available in GLX or GLX extensions.
The ABI between the main library and its drivers are not stable. Nor is
+there a plan to stabilize it at the moment. Of the EGL drivers,
+egl_gallium
has its own hardware drivers and client API modules.
+They are considered internal to egl_gallium
and there is also no
+stable ABI between them. These should be kept in mind when packaging for
+distribution.
Generally, egl_dri2
is preferred over egl_gallium
+when the system already has DRI drivers. As egl_gallium
is loaded
+before egl_dri2
when both are available, egl_gallium
+is disabled by default.
The sources of the main library and the classic drivers can be found at
@@ -286,17 +316,5 @@ not be called with the sample display at the same time. If a driver has access
to an EGLDisplay
without going through the EGL APIs, the driver
should as well lock the display before using it.
-
libGL.so
, libGLESv1_CM.so
, and
-libGLESv2.so
should an application link to? Bad things may happen
-when, say, an application is linked to libGLESv2.so
and
-libcairo
, which is linked to libGL.so
instead.