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automatically detect duplicate constant and function definitions
between vendor and ARB extensions and the OpenGL core, and to remove
the suffixes of ARB extensions. This code has helped automate the
process of discovering extensions that were promoted into the OpenGL
core.
While this code has saved some manual effort, it has also caused
several problems:
1. It causes obsolete ARB extensions to be incorrectly moved into the
core OpenGL namespace. GL_ARB_texture_rectangle, GL_ARB_vertex_blend,
and GL_ARB_matrix_palette are examples of extensions that should not
have their ARB suffixes removed because they are dead-end extensions.
Definitions which are explicitly specified that they will change, such
as those in the EGL_KHR_sync extension, were also incorrectly moved
into the core namespace.
2. It has caused certain OpenGL ES-specific definitions to
accidentally be promoted into the core OpenGL namespace: for example,
the constants associated with the GL_OES_point_size_array extension,
which were incorrectly placed into the GL2ES1 interface.
3. It causes namespace collisions between certain ARB extensions that
are only accessible via their ARB entry points and core OpenGL
routines: specifically GL_ARB_vertex_program and GL_ARB_fragment
program. Based on tests on NVIDIA's drivers, when a developer wants to
use the earlier ARB_vertex_program and ARB_fragment_program semantics
rather than GLSL, it is mandatory to use the ARB entry points rather
than the core OpenGL entry points.
4. It is not easy to configure the behavior of this automatic merging,
nor easy to see how it would be extended to be configurable.
5. It does not address the problem of detecting which extensions are
common between desktop OpenGL and OpenGL ES. A different algorithm
would be needed to solve that problem.
6. It has a high degree of functional overlap to the IgnoreExtension
directive which has previously been used to ignore ARB extensions that
were promoted into the OpenGL core. There were already IgnoreExtension
directives in place for all of the OpenGL extensions subsumed in
OpenGL 1.1 through 1.3.
7. It has been the cause of several bugs and unexpected interactions
with the Ignore and ForceProcAddressGen directives.
After careful consideration, it appears that the problems with this
code outweigh the benefits and it has been removed. The run-time code
which attempts to find extension variants of core entry points has
been retained, however.
To reduce the amount of subsequent manual work, the following
additions have been made:
1. A generic SymbolFilter mechanism has been added to GlueGen, which
can be used to pre-process the entire set of constant and function
definitions at any time during glue code generation (although it is
recommended to do so at the beginning of processing, i.e., in
GlueEmitter.beginEmission()).
2. The RenameJavaMethod directive has been generalized to
RenameJavaSymbol, and can now work on constant definitions.
3. A ConstantDefinition class has been added.
4. A RenameExtensionIntoCore directive has been added to the GLEmitter
which will rename all constant definitions and entry points associated
with a particular OpenGL extension into the core namespace, i.e.,
stripping off any ARB or similar suffixes.
5. An AutoUnifyExtensions directive has been added which is disabled
by default but which will automatically ignore any OpenGL extension
which has been completely subsumed into the OpenGL core and, if not,
print out the first declaration in that extension which caused it to
fail to be ignored.
The extensions common between OpenGL ES and desktop OpenGL have now
largely been moved into the core namespace using the
RenameExtensionIntoCore directive. A couple of these extensions had
slight differences between desktop OpenGL and OpenGL ES; the common
declarations were renamed manually.
IgnoreExtension directives have been added for those ARB extensions
promoted into the OpenGL core up to OpenGL 2.1. A few extensions which
were either silently promoted into the core specification
(GL_EXT_paletted_texture) or are obsolete (GL_EXT_multisample,
GL_EXT_point_parameters) were also ignored. The GlueGen runtime code
which looks up extension versions of core APIs via GLExtensionNames
makes this possible without breaking compatibility on older machines
that do not support OpenGL 2.1 directly.
With these changes, the same effect as the automatic extension
unification mechanism has been achieved, with much more explainable
and controllable results. Before-and-after versions of all of the
public interfaces (GL, GL2ES1, GL2ES2, GLES1, GLES2, and GL2) have
been compared by hand to ensure that the results are as expected and
desired.
Bugs in BuildStaticGLInfo were fixed which were preventing the
extension associations in the OpenGL ES headers from being discovered.
getExtensions() was added to be able to enumerate the discovered
extensions. Most .cfg files were changed to parse both the desktop
OpenGL and the OpenGL ES headers using the GLHeaders directive so that
the extension associations are known for both sets of APIs.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1908 232f8b59-042b-4e1e-8c03-345bb8c30851
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git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1896 232f8b59-042b-4e1e-8c03-345bb8c30851
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git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1894 232f8b59-042b-4e1e-8c03-345bb8c30851
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git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1893 232f8b59-042b-4e1e-8c03-345bb8c30851
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git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1892 232f8b59-042b-4e1e-8c03-345bb8c30851
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git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1891 232f8b59-042b-4e1e-8c03-345bb8c30851
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com.sun.opengl.util. Fixed remaining references to
javax.media.opengl.util package. Updated demos.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1890 232f8b59-042b-4e1e-8c03-345bb8c30851
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implementation detail. Removed GL2ES12 queries from the GLProfile
class. Changed GL2ES12 instance to pay attention to the chosen profile
so it behaves only like either GL2ES1 or GL2ES2. Sven's fixed function
emulation can now be tested on the desktop without needing OpenGL ES
emulation libraries. However, there appear to be problems running it
on top of Apple's OpenGL implementation -- seen by running
demos.es1.RedSquare and demos.es1.angeles.Main forcing the use of the
GL2ES2 profile.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1889 232f8b59-042b-4e1e-8c03-345bb8c30851
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BuildComposablePipeline's generated code. Stopped squelching
exceptions in GlueGen. Fixed error in glxext.cfg.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1888 232f8b59-042b-4e1e-8c03-345bb8c30851
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git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1887 232f8b59-042b-4e1e-8c03-345bb8c30851
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public and implementation packages and into
com.sun.opengl.util.glsl.fixed.* and other subpackages of
com.sun.opengl.util. Renamed javax.media.opengl.sub.GLObject to
javax.media.opengl.GLBase. Moved interfaces in
javax.media.opengl.sub.fixed to javax.media.opengl.fixedfunc and
changed naming convention. Moved all classes in
javax.media.opengl.util to com.sun.opengl.util. Moved
com.sun.opengl.impl.packrect to com.sun.opengl.util.packrect. Renamed
InternalBufferUtils to InternalBufferUtil to match naming convention
and copied in needed routines for GLU and other classes. Fixed build
breakage when specifying rootrel.build property; reintroduced
build-temp directory. Updated demos.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1886 232f8b59-042b-4e1e-8c03-345bb8c30851
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git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1885 232f8b59-042b-4e1e-8c03-345bb8c30851
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into NativeWindowFactory introduced an undesirable dependence between
the windowing toolkit, which can be replaced via NativeWindowFactory,
and the library which implements the selection algorithm, for example
OpenGL. This would prevent, for example, an easy SWT port of JOGL.
To fix this, refactored chooseCapabilities into new
GraphicsConfigurationFactory, the default implementation of which is
currently a no-op on X11 platforms, and which is provided by JOGL in a
toolkit-agnostic manner via GLX. Refactored OpenGL portions of
Capabilities class back into GLCapabilities. Reintroduced
GLCapabilitiesChooser interface for compatibility and to avoid having
to import javax.media.nativewindow classes in most user code.
Fixed problem in GLProfile where failures to load native libraries
were being squelched. Reorganized build to have all outputs under
build/ directory.
git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1884 232f8b59-042b-4e1e-8c03-345bb8c30851
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git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1882 232f8b59-042b-4e1e-8c03-345bb8c30851
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git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/branches/JOGL_2_SANDBOX@1872 232f8b59-042b-4e1e-8c03-345bb8c30851
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