ARB_texture_float references US Patent #6,650,327 [1] which has a filing date of June 16 1998.
According to [2], patents filed after 1995 expire 20 years from the filing date, giving an expiration of June 17 2018. [1] https://www.google.com/patents/US6650327 [2] https://en.wikipedia.org/wiki/Term_of_patent_in_the_United_States --- configure.ac | 15 ------------- docs/patents.txt | 31 --------------------------- meson.build | 4 ---- meson_options.txt | 6 ------ scons/gallium.py | 4 ---- src/gallium/auxiliary/util/u_format.c | 9 -------- src/mesa/main/extensions.c | 2 -- 7 files changed, 71 deletions(-) delete mode 100644 docs/patents.txt diff --git a/configure.ac b/configure.ac index 3f747bf38cc..7a0e4754208 100644 --- a/configure.ac +++ b/configure.ac @@ -763,21 +763,6 @@ esac AC_SUBST([LIB_EXT]) -dnl -dnl potentially-infringing-but-nobody-knows-for-sure stuff -dnl -AC_ARG_ENABLE([texture-float], - [AS_HELP_STRING([--enable-texture-float], - [enable floating-point textures and renderbuffers @<:@default=disabled@:>@])], - [enable_texture_float="$enableval"], - [enable_texture_float=no] -) -if test "x$enable_texture_float" = xyes; then - AC_MSG_WARN([Floating-point textures enabled.]) - AC_MSG_WARN([Please consult docs/patents.txt with your lawyer before building Mesa.]) - DEFINES="$DEFINES -DTEXTURE_FLOAT_ENABLED" -fi - dnl dnl Arch/platform-specific settings dnl diff --git a/docs/patents.txt b/docs/patents.txt deleted file mode 100644 index 91c5757d14d..00000000000 --- a/docs/patents.txt +++ /dev/null @@ -1,31 +0,0 @@ -ARB_texture_float: - - Silicon Graphics, Inc. owns US Patent #6,650,327, issued November 18, - 2003 [1]. - - SGI believes this patent contains necessary IP for graphics systems - implementing floating point rasterization and floating point - framebuffer capabilities described in ARB_texture_float extension, and - will discuss licensing on RAND terms, on an individual basis with - companies wishing to use this IP in the context of conformant OpenGL - implementations [2]. - - The source code to implement ARB_texture_float extension is included - and can be toggled on at compile time, for those who purchased a - license from SGI, or are in a country where the patent does not apply, - etc. - - 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. - - You should contact a lawyer or SGI's legal department if you want to - enable this extension. - - -[1] https://patents.google.com/patent/US6650327B1 -[2] https://www.opengl.org/registry/specs/ARB/texture_float.txt diff --git a/meson.build b/meson.build index 22e7a6d6cda..cd124c7bbe7 100644 --- a/meson.build +++ b/meson.build @@ -60,10 +60,6 @@ with_tools = get_option('tools') if with_tools.contains('all') with_tools = ['freedreno', 'glsl', 'intel', 'nir', 'nouveau'] endif -if get_option('texture-float') - pre_args += '-DTEXTURE_FLOAT_ENABLED' - warning('Floating-point texture enabled. Please consult docs/patents.txt and your lawyer before building mesa.') -endif dri_drivers_path = get_option('dri-drivers-path') if dri_drivers_path == '' diff --git a/meson_options.txt b/meson_options.txt index bfe2290868f..11d2b198dd0 100644 --- a/meson_options.txt +++ b/meson_options.txt @@ -264,12 +264,6 @@ option( value : false, description : 'Build unit tests. Currently this will build *all* unit tests, which may build more than expected.' ) -option( - 'texture-float', - type : 'boolean', - value : false, - description : 'Enable floating point textures and renderbuffers. This option may be patent encumbered, please read docs/patents.txt and consult with your lawyer before turning this on.' -) option( 'selinux', type : 'boolean', diff --git a/scons/gallium.py b/scons/gallium.py index 6cb20efcbf4..92a762a0c1e 100755 --- a/scons/gallium.py +++ b/scons/gallium.py @@ -392,10 +392,6 @@ def generate(env): cppdefines += ['PIPE_SUBSYSTEM_WINDOWS_USER'] if env['embedded']: cppdefines += ['PIPE_SUBSYSTEM_EMBEDDED'] - if env['texture_float']: - print('warning: Floating-point textures enabled.') - print('warning: Please consult docs/patents.txt with your lawyer before building Mesa.') - cppdefines += ['TEXTURE_FLOAT_ENABLED'] env.Append(CPPDEFINES = cppdefines) # C compiler options diff --git a/src/gallium/auxiliary/util/u_format.c b/src/gallium/auxiliary/util/u_format.c index 369b4c3126b..e0325e9c534 100644 --- a/src/gallium/auxiliary/util/u_format.c +++ b/src/gallium/auxiliary/util/u_format.c @@ -242,16 +242,7 @@ util_format_is_supported(enum pipe_format format, unsigned bind) return FALSE; } -#ifndef TEXTURE_FLOAT_ENABLED - if ((bind & PIPE_BIND_RENDER_TARGET) && - format != PIPE_FORMAT_R9G9B9E5_FLOAT && - format != PIPE_FORMAT_R11G11B10_FLOAT && - util_format_is_float(format)) { - return FALSE; - } -#else (void)bind; -#endif return TRUE; } diff --git a/src/mesa/main/extensions.c b/src/mesa/main/extensions.c index 38fc52d0205..5c8bd7a8741 100644 --- a/src/mesa/main/extensions.c +++ b/src/mesa/main/extensions.c @@ -129,9 +129,7 @@ _mesa_enable_sw_extensions(struct gl_context *ctx) ctx->Extensions.ARB_texture_env_crossbar = GL_TRUE; ctx->Extensions.ARB_texture_env_dot3 = GL_TRUE; ctx->Extensions.ARB_texture_filter_anisotropic = GL_TRUE; -#ifdef TEXTURE_FLOAT_ENABLED ctx->Extensions.ARB_texture_float = GL_TRUE; -#endif ctx->Extensions.ARB_texture_mirror_clamp_to_edge = GL_TRUE; ctx->Extensions.ARB_texture_non_power_of_two = GL_TRUE; ctx->Extensions.ARB_texture_rg = GL_TRUE; -- 2.17.1 _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
