[Mesa-dev] [PATCH 14.1/15] glapi: Store exec table version info outside the XML
Ilia Mirkin
imirkin at alum.mit.edu
Tue May 19 19:29:37 PDT 2015
On Tue, May 19, 2015 at 3:54 PM, Ian Romanick <idr at freedesktop.org> wrote:
> From: Ian Romanick <ian.d.romanick at intel.com>
>
> Currently on the functions that are exclusive to core-profile are
> implemented. The remainder continue to live in the XML. Additional
> functions can be moved later.
>
> The functions for GL_ARB_draw_indirect and GL_ARB_multi_draw_indirect
> are put in the dispatch table inside the VBO module, so they do not need
> to be moved over.
>
> The diff of src/mesa/main/api_exec.c before and after this patch is as
> expected. All of the functions listed in apiexec.py moved out of a 'if
> (_mesa_is_desktop(ctx))' block into a new 'if (ctx->API ==
> API_OPENGL_CORE)' block.
>
> Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
> Cc: Dave Airlie <airlied at redhat.com>
> Cc: Ilia Mirkin <imirkin at alum.mit.edu>
> Cc: Dylan Baker <baker.dylan.c at gmail.com>
> Cc: "10.6" <mesa-stable at lists.freedesktop.org>
> ---
> src/mapi/glapi/gen/Makefile.am | 3 +-
> src/mapi/glapi/gen/apiexec.py | 142 +++++++++++++++++++++++++++++++++++++++
> src/mapi/glapi/gen/gl_genexec.py | 54 ++++++++++++---
> 3 files changed, 187 insertions(+), 12 deletions(-)
> create mode 100644 src/mapi/glapi/gen/apiexec.py
>
> diff --git a/src/mapi/glapi/gen/Makefile.am b/src/mapi/glapi/gen/Makefile.am
> index adebd5c..64bc2ff 100644
> --- a/src/mapi/glapi/gen/Makefile.am
> +++ b/src/mapi/glapi/gen/Makefile.am
> @@ -61,6 +61,7 @@ EXTRA_DIST= \
> $(MESA_GLAPI_DIR)/glapi_x86-64.S \
> $(MESA_GLAPI_DIR)/glapi_sparc.S \
> $(COMMON_GLX) \
> + apiexec.py \
> gl_apitemp.py \
> gl_enums.py \
> gl_genexec.py \
> @@ -267,7 +268,7 @@ $(MESA_GLAPI_DIR)/glapi_sparc.S: gl_SPARC_asm.py $(COMMON)
> $(MESA_DIR)/main/enums.c: gl_enums.py $(COMMON)
> $(PYTHON_GEN) $< -f $(srcdir)/gl_and_es_API.xml > $@
>
> -$(MESA_DIR)/main/api_exec.c: gl_genexec.py $(COMMON)
> +$(MESA_DIR)/main/api_exec.c: gl_genexec.py apiexec.py $(COMMON)
> $(PYTHON_GEN) $< -f $(srcdir)/gl_and_es_API.xml > $@
>
> $(MESA_DIR)/main/dispatch.h: gl_table.py $(COMMON)
> diff --git a/src/mapi/glapi/gen/apiexec.py b/src/mapi/glapi/gen/apiexec.py
> new file mode 100644
> index 0000000..1a9f042
> --- /dev/null
> +++ b/src/mapi/glapi/gen/apiexec.py
> @@ -0,0 +1,142 @@
> +#!/usr/bin/env python2
I wouldn't put that line there (or make the file +x, which you didn't
as well). It's not an executable script.
> +
> +# Copyright (C) 2015 Intel Corporation
> +#
> +# Permission is hereby granted, free of charge, to any person obtaining a
> +# copy of this software and associated documentation files (the "Software"),
> +# to deal in the Software without restriction, including without limitation
> +# the rights to use, copy, modify, merge, publish, distribute, sublicense,
> +# and/or sell copies of the Software, and to permit persons to whom the
> +# Software is furnished to do so, subject to the following conditions:
> +#
> +# The above copyright notice and this permission notice (including the next
> +# paragraph) shall be included in all copies or substantial portions of the
> +# Software.
> +#
> +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> +# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
> +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> +# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
> +# IN THE SOFTWARE.
> +
> +class exec_info():
> + """Information relating GL APIs to a function.
> +
> + Each of the four attributes of this class, compatibility, core, es1, and
> + es2, specify the minimum API version where a function can possibly exist
> + in Mesa. The version is specified as an integer of (real GL version *
> + 10). For example, glCreateProgram was added in OpenGL 2.0, so
> + compatibility=20 and core=31.
> +
> + If the attribute is None, then it cannot be supported by that
> + API. For example, glNewList was removed from core profiles, so
> + compatibility=10 and core=None.
> +
> + Each of the attributes that is not None must have a valid value. The
> + valid ranges are:
> +
> + compatiblity: [10, 30]
> + core: [31, )
> + es1: [10, 11]
> + es2: [20, )
> +
> + These ranges are enforced by the constructor.
No harm in doing this, but in practice, only the es2 version is used
for anything, right?
> + """
> + def __init__(self, compatibility=None, core=None, es1=None, es2=None):
> + if compatibility is not None:
> + assert isinstance(compatibility, int)
> + assert compatibility >= 10
> + assert compatibility <= 30
> +
> + if core is not None:
> + assert isinstance(core, int)
> + assert core >= 31
> +
> + if es1 is not None:
> + assert isinstance(es1, int)
> + assert es1 == 10 or es1 == 11
> +
> + if es2 is not None:
> + assert isinstance(es2, int)
> + assert es2 >= 20
> +
> + self.compatibility = compatibility
> + self.core = core
> + self.es1 = es1
> + self.es2 = es2
> +
> +functions = {
> + # OpenGL 3.1 / GL_ARB_texture_buffer_object. Mesa only exposes this
> + # extension with core profile.
> + "TexBuffer": exec_info(core=31),
> +
> + # OpenGL 3.2 / GL_ARB_geometry_shader4. Mesa does not support
> + # GL_ARB_geometry_shader4, so OpenGL 3.2 is required.
> + "FramebufferTexture": exec_info(core=32),
> +
> + # OpenGL 4.0 / GL_ARB_gpu_shader_fp64. The extension spec says:
> + #
> + # "OpenGL 3.2 and GLSL 1.50 are required."
> + "Uniform1d": exec_info(core=32),
> + "Uniform2d": exec_info(core=32),
> + "Uniform3d": exec_info(core=32),
> + "Uniform4d": exec_info(core=32),
> + "Uniform1dv": exec_info(core=32),
> + "Uniform2dv": exec_info(core=32),
> + "Uniform3dv": exec_info(core=32),
> + "Uniform4dv": exec_info(core=32),
> + "UniformMatrix2dv": exec_info(core=32),
> + "UniformMatrix3dv": exec_info(core=32),
> + "UniformMatrix4dv": exec_info(core=32),
> + "UniformMatrix2x3dv": exec_info(core=32),
> + "UniformMatrix2x4dv": exec_info(core=32),
> + "UniformMatrix3x2dv": exec_info(core=32),
> + "UniformMatrix3x4dv": exec_info(core=32),
> + "UniformMatrix4x2dv": exec_info(core=32),
> + "UniformMatrix4x3dv": exec_info(core=32),
> + "GetUniformdv": exec_info(core=32),
> +
> + # OpenGL 4.1 / GL_ARB_vertex_attrib_64bit. The extension spec says:
> + #
> + # "OpenGL 3.0 and GLSL 1.30 are required.
> + #
> + # ARB_gpu_shader_fp64 (or equivalent functionality) is required."
> + #
> + # For Mesa this effectively means OpenGL 3.2 is required. It seems
> + # unlikely that Mesa will ever get support for any of the NV extensions
> + # that add "equivalent functionality."
> + "VertexAttribL1d": exec_info(core=32),
> + "VertexAttribL2d": exec_info(core=32),
> + "VertexAttribL3d": exec_info(core=32),
> + "VertexAttribL4d": exec_info(core=32),
> + "VertexAttribL1dv": exec_info(core=32),
> + "VertexAttribL2dv": exec_info(core=32),
> + "VertexAttribL3dv": exec_info(core=32),
> + "VertexAttribL4dv": exec_info(core=32),
> + "VertexAttribLPointer": exec_info(core=32),
> + "GetVertexAttribLdv": exec_info(core=32),
> +
> + # OpenGL 4.1 / GL_ARB_viewport_array. The extension spec says:
> + #
> + # "OpenGL 3.2 or the EXT_geometry_shader4 or ARB_geometry_shader4
> + # extensions are required."
> + #
> + # Mesa does not support either of the geometry shader extensions, so
> + # OpenGL 3.2 is required.
> + "ViewportArrayv": exec_info(core=32),
> + "ViewportIndexedf": exec_info(core=32),
> + "ViewportIndexedfv": exec_info(core=32),
> + "ScissorArrayv": exec_info(core=32),
> + "ScissorIndexed": exec_info(core=32),
> + "ScissorIndexedv": exec_info(core=32),
> + "DepthRangeArrayv": exec_info(core=32),
> + "DepthRangeIndexed": exec_info(core=32),
> + # GetFloati_v also GL_ARB_shader_atomic_counters
> + # GetDoublei_v also GL_ARB_shader_atomic_counters
> +
> + # OpenGL 4.3 / GL_ARB_texture_buffer_range. Mesa can expose the extension
> + # with OpenGL 3.1.
> + "TexBufferRange": exec_info(core=31),
> +}
> diff --git a/src/mapi/glapi/gen/gl_genexec.py b/src/mapi/glapi/gen/gl_genexec.py
> index 4e76fe3..ab00e32 100644
> --- a/src/mapi/glapi/gen/gl_genexec.py
> +++ b/src/mapi/glapi/gen/gl_genexec.py
> @@ -29,6 +29,7 @@ import collections
> import license
> import gl_XML
> import sys, getopt
> +import apiexec
>
>
> exec_flavor_map = {
> @@ -175,18 +176,49 @@ class PrintCode(gl_XML.gl_print_base):
> raise Exception(
> 'Unrecognized exec flavor {0!r}'.format(f.exec_flavor))
> condition_parts = []
> - if f.desktop:
> - if f.deprecated:
> + if f.name in apiexec.functions:
> + ex = apiexec.functions[f.name]
> + unconditional_count = 0
> +
> + if ex.compatibility is not None:
> condition_parts.append('ctx->API == API_OPENGL_COMPAT')
> - else:
> - condition_parts.append('_mesa_is_desktop_gl(ctx)')
> - if 'es1' in f.api_map:
> - condition_parts.append('ctx->API == API_OPENGLES')
> - if 'es2' in f.api_map:
> - if f.api_map['es2'] > 2.0:
> - condition_parts.append('(ctx->API == API_OPENGLES2 && ctx->Version >= {0})'.format(int(f.api_map['es2'] * 10)))
> - else:
> - condition_parts.append('ctx->API == API_OPENGLES2')
> + unconditional_count += 1
> +
> + if ex.core is not None:
> + condition_parts.append('ctx->API == API_OPENGL_CORE')
> + unconditional_count += 1
> +
> + if ex.es1 is not None:
> + condition_parts.append('ctx->API == API_OPENGLES')
> + unconditional_count += 1
> +
> + if ex.es2 is not None:
> + if ex.es2 > 20:
> + condition_parts.append('(ctx->API == API_OPENGLES2 && ctx->Version >= {0})'.format(ex.es2))
> + else:
> + condition_parts.append('ctx->API == API_OPENGLES2')
> + unconditional_count += 1
> +
> + # If the function is unconditionally available in all four
> + # APIs, then it is always available. Replace the complex
> + # tautology condition with "true" and let GCC do the right
> + # thing.
> + if unconditional_count == 4:
> + condition_parts = ['true']
> + else:
> + if f.desktop:
> + if f.deprecated:
> + condition_parts.append('ctx->API == API_OPENGL_COMPAT')
> + else:
> + condition_parts.append('_mesa_is_desktop_gl(ctx)')
> + if 'es1' in f.api_map:
> + condition_parts.append('ctx->API == API_OPENGLES')
> + if 'es2' in f.api_map:
> + if f.api_map['es2'] > 2.0:
> + condition_parts.append('(ctx->API == API_OPENGLES2 && ctx->Version >= {0})'.format(int(f.api_map['es2'] * 10)))
> + else:
> + condition_parts.append('ctx->API == API_OPENGLES2')
> +
> if not condition_parts:
> # This function does not exist in any API.
> continue
> --
> 2.1.0
>
This all seems fine. I trust you on the function selection. However as
this is all subtle and easily breakable, could I convince you to write
a piglit test that verifies some of this behaviour? i.e. that
GetProcAddress fails for a few of those functions in a compat context
[and you can skip if the extensions are advertised, so that we don't
fail on blobs that provide a high-version GL]
With that, and the above nits,
Reviewed-by: Ilia Mirkin <imirkin at alum.mit.edu>
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