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Introduce a glProgramBinary-based disk cache in QOpenGLShaderProgram.
By switching the typical
program->addShaderFromSourceCode(QOpenGLShader::Vertex, ...)
program->addShaderFromSourceCode(QOpenGLShader::Fragment, ...)
invocations to
program->addCacheableShaderFromSourceCode(QOpenGLShader::Vertex, ...)
program->addCacheableShaderFromSourceCode(QOpenGLShader::Fragment, ...)
the compilation may be skipped via gl(Get)ProgramBinary and a disk
cache, when supported. Such QOpenGLShaderProgram instances will have
no QOpenGLShader instances attached. Instead, the entire program
binary (which is driver-specific) is loaded as-is.
Support means OpenGL ES 3.0 or the presence of
GL_ARB_get_program_binary, in combination with >= 1 supported binary
formats. Note that some drivers claim program binary support but
expose no formats. This amounts to no support in practice.
When support is not present, calling the new functions is equivalent
to the non-cacheable variants. If the OpenGL driver changes (vendor,
renderer, version strings), recompilation and storage of the new,
potentially incompatible binary program will happen transparently.
The cache can always be disabled by setting
QT_DISABLE_SHADER_DISK_CACHE=1 or the new application attribute
Qt::AA_DisableShaderDiskCache.
Location-wise the primary choice is the shared cache
(GenericCacheLocation). If this is not available or is not writable,
the per-process one (CacheLocation) is used instead.
In addition to the new public APIs in QOpenGLShaderProgram, the main
shader users in QtGui are migrated as well. (OpenGL paint engine,
glyph cache, blitter, eglfs mouse cursor). This means that any
application using QPainter on OpenGL or widgets with eglfs will
benefit from the improved startup times. Qt Quick will follow suit as
well.
[ChangeLog][QtGui][OpenGL] QOpenGLShaderProgram offers a built-in
program binary disk cache for systems with OpenGL ES 3.x or
GL_ARB_get_program_binary. This can lead to significant increases in
performance when it comes to application startup times for
example. Usage is opt-in for direct C++ users of the class, however
Qt's own main users of shaders, including Qt Quick and QPainter's
OpenGL engine, are migrated to use the new, cache-enabled APIs.
Opting out on application level is always possible via
Qt::AA_DisableShaderDiskCache.
Task-number: QTBUG-55496
Change-Id: I556f053d258bfa6887b1d5238c9f6396914c5421
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
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In 5.8 cr got changed to QRect from QRectF. This is incorrect without
adjusting the calculations based on it since QRect and QRectF's right()
and bottom() differs by 1.
Switch back to QRectF.
Task-number: QTBUG-56478
Change-Id: I5bde4ee59ca9bbf62f65493c66f42707032bfc80
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
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Move platform integration, context and offscreensurface to under 'api'.
This allows accessing these from out-of-tree eglfs backends as well.
For instance, the upcoming eglfs_emu backend for the Qt Simulator may need
access to QEglFSIntegration.
Clean up the project files and remove out-of-date comments (the private
module QtEglFSDeviceIntegration is not really header-less since 5.7).
Change-Id: If96dd5780a6bd33a1cf29164364df9bf921c4d01
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
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The GBM-based hardware cursor already has this. Let's implement it
in the commonly used OpenGL cursor too. The main user will be the
EGLDevice backend which does not currently have a hardware cursor
but supports multiple screens.
This also means QEglFSCursor must be capable of operating on different
contexts (and what's more, non-sharing contexts).
Task-number: QTBUG-55161
Change-Id: Ie23bba1e6aab34b04d689f26a84c19a2bde518da
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
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Running QWidget or other raster window-based apps with
QT_QPA_EGLFS_ROTATION=180 will now flip the screen as expected.
In addition, 90 and -90 are supported too. These will affect the
reported screen geometry as well.
The OpenGL mouse cursor is repositioned and rotated accordingly. For
true OpenGL content the rotation is ignored. Hardware mouse cursors
(DRM) ignore it as well for the time being.
[ChangeLog][Platform Specific Changes] QWidget-based applications
running on the eglfs platform plugin can now request 180 or 90 degrees
rotated output by setting the QT_QPA_EGLFS_ROTATION environment
variable.
Task-number: QTBUG-39959
Change-Id: I3570b515d0233c6c6a0e813899b935ee222eab62
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
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This allows external integrations to be developed against it.
Also uniforms all class names as QEglFSFoo.
Change-Id: I72ff37c0fcdf1ccd37110b4c36874d6c99b2e743
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
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