The GL side of this extension just provides an accessor via glGetIntegerv for the value of GL_CONTEXT_RELEASE_BEHAVIOR so it is trivial to implement. There is a constant on the context for the value of the enum which is initialised to GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH. The extension is always enabled because it doesn't need any driver interaction to retrieve the value.
If the value of the enum is anything but FLUSH then _mesa_make_current will now refrain from calling _mesa_flush. This should only affect drivers that explicitly change the enum to a non-default value. --- src/mapi/glapi/gen/KHR_context_flush_control.xml | 11 +++++++++++ src/mapi/glapi/gen/gl_API.xml | 2 ++ src/mesa/main/context.c | 9 +++++++-- src/mesa/main/extensions.c | 1 + src/mesa/main/get_hash_params.py | 3 +++ src/mesa/main/mtypes.h | 3 +++ 6 files changed, 27 insertions(+), 2 deletions(-) create mode 100644 src/mapi/glapi/gen/KHR_context_flush_control.xml diff --git a/src/mapi/glapi/gen/KHR_context_flush_control.xml b/src/mapi/glapi/gen/KHR_context_flush_control.xml new file mode 100644 index 0000000..bc72435 --- /dev/null +++ b/src/mapi/glapi/gen/KHR_context_flush_control.xml @@ -0,0 +1,11 @@ +<?xml version="1.0"?> +<!DOCTYPE OpenGLAPI SYSTEM "gl_API.dtd"> + +<OpenGLAPI> + +<category name="GL_KHR_context_flush_control" number="168"> + <enum name="CONTEXT_RELEASE_BEHAVIOR" value="0x82FB"/> + <enum name="CONTEXT_RELEASE_BEHAVIOR_FLUSH" value="0x82FC"/> +</category> + +</OpenGLAPI> diff --git a/src/mapi/glapi/gen/gl_API.xml b/src/mapi/glapi/gen/gl_API.xml index 73f2f75..6cc9a4f 100644 --- a/src/mapi/glapi/gen/gl_API.xml +++ b/src/mapi/glapi/gen/gl_API.xml @@ -8377,6 +8377,8 @@ <xi:include href="ARB_texture_barrier.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/> +<xi:include href="KHR_context_flush_control.xml" xmlns:xi="http://www.w3.org/2001/XInclude"/> + <!-- Non-ARB extensions sorted by extension number. --> <category name="GL_EXT_blend_color" number="2"> diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c index 0edd66d..65300e3 100644 --- a/src/mesa/main/context.c +++ b/src/mesa/main/context.c @@ -718,6 +718,9 @@ _mesa_init_constants(struct gl_constants *consts, gl_api api) /** GL_ARB_gpu_shader5 */ consts->MinFragmentInterpolationOffset = MIN_FRAGMENT_INTERPOLATION_OFFSET; consts->MaxFragmentInterpolationOffset = MAX_FRAGMENT_INTERPOLATION_OFFSET; + + /** GL_KHR_context_flush_control */ + consts->ContextReleaseBehavior = GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH; } @@ -1587,9 +1590,11 @@ _mesa_make_current( struct gl_context *newCtx, } if (curCtx && - (curCtx->WinSysDrawBuffer || curCtx->WinSysReadBuffer) && + (curCtx->WinSysDrawBuffer || curCtx->WinSysReadBuffer) && /* make sure this context is valid for flushing */ - curCtx != newCtx) + curCtx != newCtx && + curCtx->Const.ContextReleaseBehavior == + GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH) _mesa_flush(curCtx); /* We used to call _glapi_check_multithread() here. Now do it in drivers */ diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c index f0e2f89..c9ab861 100644 --- a/src/mesa/main/extensions.c +++ b/src/mesa/main/extensions.c @@ -319,6 +319,7 @@ static const struct extension extension_table[] = { /* KHR extensions */ { "GL_KHR_debug", o(dummy_true), GL, 2012 }, + { "GL_KHR_context_flush_control", o(dummy_true), GL | ES2, 2014 }, /* Vendor extensions */ { "GL_3DFX_texture_compression_FXT1", o(TDFX_texture_compression_FXT1), GL, 1999 }, diff --git a/src/mesa/main/get_hash_params.py b/src/mesa/main/get_hash_params.py index da35684..3fc819b 100644 --- a/src/mesa/main/get_hash_params.py +++ b/src/mesa/main/get_hash_params.py @@ -318,6 +318,9 @@ descriptor=[ [ "PERFQUERY_COUNTER_NAME_LENGTH_MAX_INTEL", "CONST(MAX_PERFQUERY_COUNTER_NAME_LENGTH), extra_INTEL_performance_query" ], [ "PERFQUERY_COUNTER_DESC_LENGTH_MAX_INTEL", "CONST(MAX_PERFQUERY_COUNTER_DESC_LENGTH), extra_INTEL_performance_query" ], [ "PERFQUERY_GPA_EXTENDED_COUNTERS_INTEL", "CONST(PERFQUERY_HAVE_GPA_EXTENDED_COUNTERS), extra_INTEL_performance_query" ], + +# GL_KHR_context_flush_control + [ "CONTEXT_RELEASE_BEHAVIOR", "CONTEXT_ENUM(Const.ContextReleaseBehavior), NO_EXTRA" ], ]}, # GLES3 is not a typo. diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h index dd330ea..a96663b 100644 --- a/src/mesa/main/mtypes.h +++ b/src/mesa/main/mtypes.h @@ -3633,6 +3633,9 @@ struct gl_constants GLboolean FakeSWMSAA; + /** GL_KHR_context_flush_control */ + GLenum ContextReleaseBehavior; + struct gl_shader_compiler_options ShaderCompilerOptions[MESA_SHADER_STAGES]; }; -- 1.9.3 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
