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Fixed OpenGL extension detection for extensions promoted to OpenGL core.

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For a given OpenGL context, macOS in particular does not support enumeration / detection of OpenGL features that have been promoted to core OpenGL functionality. It is possible other drivers are the same. This change assumes support for GL_ARB_texture_non_power_of_two with OpenGL 2.0+, GL_ARB_texture_rectangle with OpenGL 3.1+ and GL_EXT_framebuffer_blit with OpenGL 3.0+. I failed to find definitive information on whether GL_GREMEDY_frame_terminator has been promoted to OpenGL core, or whether GL_ANGLE_framebuffer_blit or GL_EXT_unpack_subimage have been promoted to core in OpenGL ES. This change results in a significant GtkGLArea performance boost on macOS.

Closes #2428
This commit is contained in:
David Hogan 2020-02-13 06:52:24 +11:00
parent 011dcf828b
commit 66e2e9c02a
1 changed files with 3 additions and 3 deletions
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6
gdk/gdkglcontext.c
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@ -812,10 +812,10 @@ gdk_gl_context_check_extensions (GdkGLContext *context)
}
else
{
has_npot = epoxy_has_gl_extension ("GL_ARB_texture_non_power_of_two");
has_texture_rectangle = epoxy_has_gl_extension ("GL_ARB_texture_rectangle");
has_npot = priv->gl_version >= 20 || epoxy_has_gl_extension ("GL_ARB_texture_non_power_of_two");
has_texture_rectangle = priv->gl_version >= 31 || epoxy_has_gl_extension ("GL_ARB_texture_rectangle");
priv->has_gl_framebuffer_blit = epoxy_has_gl_extension ("GL_EXT_framebuffer_blit");
priv->has_gl_framebuffer_blit = priv->gl_version >= 30 || epoxy_has_gl_extension ("GL_EXT_framebuffer_blit");
priv->has_frame_terminator = epoxy_has_gl_extension ("GL_GREMEDY_frame_terminator");
priv->has_unpack_subimage = TRUE;