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Diffstat (limited to 'meta-ivi/recipes-graphics/mesa/mesa/README.gallium')
-rw-r--r-- | meta-ivi/recipes-graphics/mesa/mesa/README.gallium | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/meta-ivi/recipes-graphics/mesa/mesa/README.gallium b/meta-ivi/recipes-graphics/mesa/mesa/README.gallium new file mode 100644 index 0000000..6bc7787 --- /dev/null +++ b/meta-ivi/recipes-graphics/mesa/mesa/README.gallium @@ -0,0 +1,66 @@ +these files + revert-363b53f00069af718f64cf047f19ad5681a8bf6d.patch + revert-c46c551c56f78c6bf9e63524c89478695fc4f525.patch +are the reverts of following commit of mesa: + 363b53f00069af718f64cf047f19ad5681a8bf6d + c46c551c56f78c6bf9e63524c89478695fc4f525 + +the reason of two patches is described at + http://lists.freedesktop.org/archives/mesa-dev/2014-November/070204.html + + +[Mesa-dev] [PATCH 0/2] Disable the EGL state tracker for Linux/DRI builds + +Marek Olšák maraeo at gmail.com +Tue Nov 4 14:42:43 PST 2014 + +Hi everybody, + +I'm about to address this long-standing issue: The EGL state tracker is +redundant. It duplicates what st/dri does and it also duplicates what +the common loader egl_dri2 does, which is used by all classic drivers +and even works better with gallium drivers. + +Let's compare EGL extensions for both backends: + +st/egl: +EGL version string: 1.4 (Gallium) +EGL client APIs: OpenGL OpenGL_ES OpenGL_ES2 OpenVG +EGL extensions string: + EGL_WL_bind_wayland_display EGL_KHR_image_base EGL_KHR_image_pixmap + EGL_KHR_image EGL_KHR_reusable_sync EGL_KHR_fence_sync + EGL_KHR_surfaceless_context EGL_NOK_swap_region + EGL_NV_post_sub_buffer + +egl_dri2: +EGL version string: 1.4 (DRI2) +EGL client APIs: OpenGL OpenGL_ES OpenGL_ES2 OpenGL_ES3 +EGL extensions string: + EGL_MESA_drm_image EGL_MESA_configless_context EGL_KHR_image_base + EGL_KHR_image_pixmap EGL_KHR_image EGL_KHR_gl_texture_2D_image + EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image + EGL_KHR_surfaceless_context EGL_KHR_create_context + EGL_NOK_swap_region EGL_NOK_texture_from_pixmap + EGL_CHROMIUM_sync_control EGL_EXT_image_dma_buf_import + EGL_NV_post_sub_buffer + +egl_dri2 also supports MSAA on the window framebuffer (through st/dri). +It's really obvious which one is better. + +I'm aware of 2 features that we will lose: +- swrast on Wayland - I'm not sure about this. Perhaps kms-swrast has +addressed this already. +- OpenVG - It has never taken off. If people want this on Linux, it should +use egl_dri2 and st/dri, like OpenGL does. + +This series removes st/egl and st/gbm support from the autoconf build +(the latter depends on the former and is probably just as redundant). +The next step is to remove all Linux-specific backends from st/egl. +Windows, Android, and other platform backends will be kept intact, +therefore st/egl won't be removed completely. + +Please comment. + +Thanks, + +Marek |