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Diffstat (limited to 'docs/egl.html')
| -rw-r--r-- | docs/egl.html | 82 |
1 files changed, 38 insertions, 44 deletions
diff --git a/docs/egl.html b/docs/egl.html index d38f2dd7b7d..ee9bf355d7c 100644 --- a/docs/egl.html +++ b/docs/egl.html @@ -28,18 +28,17 @@ cards.</p> <ol> <li> -<p>Run <code>configure</code> with the desired state trackers and enable -the Gallium driver for your hardware. For example</p> +<p>Run <code>configure</code> with the desired client APIs and enable +the driver for your hardware. For example</p> <pre> - $ ./configure --enable-gles-overlay --with-state-trackers=egl,vega --enable-gallium-intel + $ ./configure --enable-gles2 --enable-openvg --enable-gallium-nouveau </pre> -<p>The main library and OpenGL is enabled by default. The first option enables -<a href="opengles.html">OpenGL ES 1.x and 2.x</a>. The <code>egl</code> state -tracker is needed by a number of EGL drivers. EGL drivers will be covered -later. The <a href="openvg.html">vega state tracker</a> provides OpenVG -1.x.</p> +<p>The main library and OpenGL is enabled by default. The first option above +enables <a href="opengles.html">OpenGL ES 2.x</a>. The second option enables +<a href="openvg.html">OpenVG</a>.</p> + </li> <li>Build and install Mesa as usual.</li> @@ -80,31 +79,35 @@ types such as <code>EGLNativeDisplayType</code> or <p>The available platforms are <code>x11</code>, <code>drm</code>, <code>fbdev</code>, and <code>gdi</code>. The <code>gdi</code> platform can -only be built with SCons.</p> +only be built with SCons. Unless for special needs, the build system should +select the right platforms automatically.</p> </li> -<li><code>--with-state-trackers</code> +<li><code>--enable-gles1</code> and <code>--enable-gles2</code> -<p>The argument is a comma separated string. It is usually used to specify the -rendering APIs, such as OpenVG, to build. But it is also used to specify -<code>egl</code> state tracker that <code>egl_gallium</code> depends on.</p> +<p>These options enable OpenGL ES support in OpenGL. The result is +one big library that supports multiple APIs.</p> </li> <li><code>--enable-gles-overlay</code> -<p>OpenGL and OpenGL ES are not controlled by -<code>--with-state-trackers</code>. OpenGL is always built. To build OpenGL -ES, this option must be explicitly given.</p> +<p>This option enables OpenGL ES as separate libraries. This is an alternative +approach to enable OpenGL ES. It is only supported by +<code>egl_gallium</code>.</p> </li> -<li><code>--enable-gles1</code> and <code>--enable-gles2</code> +<li><code>--enable-openvg</code> -<p>Unlike <code>--enable-gles-overlay</code>, which builds one library for each -rendering API, these options enable OpenGL ES support in OpenGL. The result is -one big library that supports multiple APIs.</p> +<p>OpenVG must be explicitly enabled by this option.</p> + +</li> + +<li><code>--enable-gallium-egl</code> + +<p>Explicitly enable or disable <code>egl_gallium</code>.</p> </li> @@ -139,10 +142,6 @@ binaries.</p> 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.</p> -<p><code>egl_gallium</code> dynamically loads hardware drivers and client API -modules found in <code>EGL_DRIVERS_PATH</code>. Thus, specifying this variable -alone is not sufficient for <code>egl_gallium</code> for uninstalled build.</p> - </li> <li><code>EGL_PLATFORM</code> @@ -150,7 +149,12 @@ alone is not sufficient for <code>egl_gallium</code> for uninstalled build.</p> <p>This variable specifies the native platform. The valid values are the same as those for <code>--with-egl-platforms</code>. When the variable is not set, the main library uses the first platform listed in -<code>--with-egl-platforms</code> as the native platform</p> +<code>--with-egl-platforms</code> as the native platform.</p> + +<p>Extensions like <code>EGL_MESA_drm_display</code> define new functions to +create displays for non-native platforms. These extensions are usually used by +applications that support non-native platforms. Setting this variable is +probably required only for some of the demos found in mesa/demo repository.</p> </li> @@ -173,11 +177,19 @@ variable to true forces the use of software rendering.</p> <h2>EGL Drivers</h2> <ul> +<li><code>egl_dri2</code> + +<p>This driver supports both <code>x11</code> and <code>drm</code> platforms. +It functions as a DRI2 driver loader. For <code>x11</code> support, it talks +to the X server directly using (XCB-)DRI2 protocol.</p> + +</li> + <li><code>egl_gallium</code> <p>This driver is based on Gallium3D. It supports all rendering APIs and hardwares supported by Gallium3D. It is the only driver that supports OpenVG. -The supported platforms are X11, KMS, FBDEV, and GDI.</p> +The supported platforms are X11, DRM, FBDEV, and GDI.</p> </li> @@ -188,23 +200,6 @@ the EGL API. It supports both direct and indirect rendering when the GLX does. It is accelerated when the GLX is. As such, it cannot provide functions that is not available in GLX or GLX extensions.</p> </li> - -<li><code>egl_dri2</code> - -<p>This driver supports the X Window System as its window system. It functions -as a DRI2 driver loader. Unlike <code>egl_glx</code>, it has no dependency on -<code>libGL</code>. It talks to the X server directly using DRI2 protocol.</p> - -</li> -<li><code>egl_dri</code> - -<p>This driver lacks maintenance and does <em>not</em> build. It is similiar -to <code>egl_dri2</code> in that it functions as a DRI(1) driver loader. But -unlike <code>egl_dri2</code>, it supports Linux framebuffer devices as its -window system and supports EGL_MESA_screen_surface extension. As DRI1 drivers -are phasing out, it might eventually be replaced by <code>egl_dri2</code>.</p> - -</li> </ul> <h2>Developers</h2> @@ -295,7 +290,6 @@ should as well lock the display before using it. <ul> <li>Pass the conformance tests</li> -<li>Reference counting in main library?</li> <li>Mixed use of OpenGL, OpenGL ES 1.1, and OpenGL ES 2.0 is supported. But which one of <code>libGL.so</code>, <code>libGLESv1_CM.so</code>, and <code>libGLESv2.so</code> should an application link to? Bad things may happen |