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Giuseppe D'Angelo 95fd21a26a RHI: introduce a way to disable framebuffer clears on GL
On low-end hardware without fast framebuffer clears one can
significantly reduce the fill rate by disabling framebuffer clears
(provided, as it's usually the case, that the application has content
filling the entire framebuffer).

Add a couple of environment variables to do so, one to disable all
clears and one to disable only color clears (in case the surface is
requested without a depth buffer). Note that disabling all clears
on a surface *with* a depth buffer still requires
QSG_NO_DEPTH_BUFFER to be set, otherwise QtQuick is going to assume
that there is a clean usable depth buffer.

Change-Id: I96ad0a3d28dd0ab65cc960fb7cb2e0a8b6f35628
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
2021-10-12 13:33:19 +02:00
.github/workflows Github Actions: many minor updates 2021-01-22 18:48:54 +01:00
bin Add missing -help argument to qt-configure-module 2021-08-20 19:44:43 +02:00
cmake Fix missing QT.<module>.run_depends entries in module .pri files 2021-10-12 01:07:21 +02:00
coin Add support for Microsoft Visual Studio 2022 Preview version 2021-09-30 09:32:11 +00:00
config.tests wasm: add simd support 2021-10-05 11:30:06 +10:00
dist Add Qt 6.0.0 changes file 2020-11-16 10:02:08 +02:00
doc Doc: Add summary to CMake commands 2021-10-04 15:55:10 +02:00
examples Remove checks for C++ standard versions C++17 and below 2021-10-01 02:46:09 +02:00
lib Purge all fonts 2015-08-18 19:59:14 +00:00
libexec Teach syncqt to filter out QT_DEPRECATED_* macros 2021-09-07 08:28:09 +02:00
mkspecs wasm: add simd support 2021-10-05 11:30:06 +10:00
qmake Skip unnecessary commands when cross-building tools 2021-09-27 16:34:23 +02:00
src RHI: introduce a way to disable framebuffer clears on GL 2021-10-12 13:33:19 +02:00
tests Select a single range of cells in QTableView, away from merged cells 2021-10-12 09:07:54 +02:00
util Don't use libs in /usr/local for configure tests by default on macOS 2021-10-08 23:15:31 +02:00
.cmake.conf Revert "CMake: Warn if cmake_minimum_required has an unsupported low version" 2021-10-04 15:55:10 +02:00
.gitattributes Give batch files CRLF line endings 2020-11-04 15:02:29 +00:00
.gitignore testlib: Accurately name JUnit test, and only run for JUnitXML reporter 2021-07-29 15:39:40 +02:00
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.tag Update the git-archive export options 2012-09-07 15:39:31 +02:00
CMakeLists.txt CMake: Enforce minimum CMake version in user projects 2021-08-04 16:03:08 +02:00
conanfile.py Conan: Use recipe revision mode for 'python_requires' 2021-09-23 17:57:04 +03:00
config_help.txt Document that schannel is on by default 2021-10-06 15:05:20 +02:00
configure Remove unsupported, host-related options from configure shell script 2021-08-05 02:44:27 +02:00
configure.bat Fix our usage of CMake script mode in Windows configure 2021-08-20 19:44:43 +02:00
configure.cmake wasm: add simd support 2021-10-05 11:30:06 +10:00
dependencies.yaml Re-add dependencies.yaml now that qt5.git wip/qt6 builds fine 2019-09-18 13:19:31 +02:00
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qt_cmdline.cmake Remove dysfunctional -coverage configure argument 2021-08-10 12:00:13 +02:00
sync.profile Implement generating of a module cpp export header 2021-06-24 20:40:49 +02:00