From: Ian Romanick <[email protected]> OpenGL ES implementations are not allowed to ship ARB extensions, and OpenGL implementations are not allowed to ship OES extensions.
The functionality is also included in GL_ARB_ES2_compatibility. Ever OpenGL core-profile driver currently exposes both extensions. I don't know of any applications that explicitly check for GL_OES_read_format, so removing it seems very unlikely to cause problems. No functionality is removed. I have left this extension in place for compatibility profile. There are still OpenGL 1.x drivers in Mesa, and adding code to check for compatibility profile and not GL_ARB_ES2_compatibility for GL_IMPLEMENTATION_COLOR_READ_TYPE and GL_IMPLEMENTATION_COLOR_READ_FORMAT just feels dumb. Three other other alternatives considered: - Remove the string from compatibility profile drivers but leave the functionality in place. - Add a flag to expose the extension string, and set it in every OpenGL driver that does not expose GL_ARB_ES2_compatibility (and those drivers only). I tried this. You can't have two instances of an extension in the extension table (one dummy_true for ES1 and one with a flag for compatibility profile), so the implementation requires a bit of effort. - Only expose the extension in compatibility if the version is less than 2.0. I didn't see an easy way to do this. Signed-off-by: Ian Romanick <[email protected]> Cc: [email protected] --- src/mesa/main/extensions_table.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/mesa/main/extensions_table.h b/src/mesa/main/extensions_table.h index 91918c2..b12a9af 100644 --- a/src/mesa/main/extensions_table.h +++ b/src/mesa/main/extensions_table.h @@ -364,7 +364,7 @@ EXT(OES_point_size_array , dummy_true EXT(OES_point_sprite , ARB_point_sprite , x , x , ES1, x , 2004) EXT(OES_primitive_bounding_box , OES_primitive_bounding_box , x , x , x , 31, 2014) EXT(OES_query_matrix , dummy_true , x , x , ES1, x , 2003) -EXT(OES_read_format , dummy_true , GLL, GLC, ES1, x , 2003) +EXT(OES_read_format , dummy_true , GLL, x , ES1, x , 2003) EXT(OES_rgb8_rgba8 , dummy_true , x , x , ES1, ES2, 2005) EXT(OES_sample_shading , OES_sample_variables , x , x , x , 30, 2014) EXT(OES_sample_variables , OES_sample_variables , x , x , x , 30, 2014) -- 2.7.4 _______________________________________________ mesa-dev mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-dev
