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Daniel Stone df2095fa35 gl-renderer: Support EGL_KHR_partial_update ... partial_update is an EGL extension which allows us to inform the driver ahead of time the limits of the areas we'll be writing to. This helps performance for GPU hardware which renders into a local tile buffer: informing the driver of the rendering extents means it can avoid fetching unchanged tiles into the tile buffer and subsequently writing them out. The extension complements rather than replaces EGL_EXT_buffer_age (used before partial_update to know which areas we need to update) and EGL_KHR_swap_buffers_with_damage (used after partial_update to inform the winsys of the changed region). Note however that partial_update deals in buffer-damage regions ('what has changed since the last time I used _this_ buffer?'), whereas swap_buffers_with_damage deals in surface-damage regions ('what has changed since the last time I rendered?'). An explanatory diagram can be found in the specification: https://www.khronos.org/registry/EGL/extensions/KHR/EGL_KHR_partial_update.txt Fixes: #134 Signed-off-by: Daniel Stone <daniels@collabora.com>		5 years ago
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gl-renderer.c	gl-renderer: Support EGL_KHR_partial_update	5 years ago
gl-renderer.h	libweston: move gl-renderer into a subdir	6 years ago
meson.build	libweston: move gl-renderer into a subdir	6 years ago