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package DC::OpenGL; |
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|
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use strict; |
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|
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use Carp (); |
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use DC; |
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|
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our %GL_EXT; |
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our $GL_VERSION; |
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|
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our $GL_NPOT; |
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our $GL_COMPRESS; |
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our $GL_BFSEP; # blendfuncseparate |
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our $GL_MULTITEX; |
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our $APPLE_NVIDIA_BUG; |
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|
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our $DEBUG = 1; |
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our %INIT_HOOK; |
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our %SHUTDOWN_HOOK; |
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|
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sub import { |
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my $caller = caller; |
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|
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no strict; |
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|
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my $symtab = *{"main::DC::OpenGL::"}{HASH}; |
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|
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for (keys %$symtab) { |
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*{"$caller\::$_"} = *$_ |
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if /^(?:gl[A-Z_]|GL_)/; |
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} |
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} |
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|
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sub init { |
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$GL_VERSION = gl_version * 1; |
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%GL_EXT = map +($_ => 1), split /\s+/, gl_extensions; |
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|
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unless (defined $::CFG->{force_opengl11}) { |
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# try to find a suitable default |
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if ( |
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$GL_VERSION >= 2.0 |
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&& (!$GL_EXT{GL_ARB_texture_non_power_of_two} |
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|| !$GL_EXT{GL_EXT_blend_func_separate}) |
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) { |
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$::CFG->{force_opengl11} = 1; |
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} else { |
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$::CFG->{force_opengl11} = 0; |
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} |
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} |
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|
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if ($::CFG->{force_opengl11}) { |
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$GL_VERSION = 1.1; |
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%GL_EXT = (); |
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} |
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|
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$GL_BFSEP = $GL_EXT{GL_EXT_blend_func_separate} || $GL_VERSION >= 2.0; |
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$GL_NPOT = $GL_EXT{GL_ARB_texture_non_power_of_two} || $GL_VERSION >= 2.0; |
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$GL_COMPRESS = $GL_EXT{GL_ARB_texture_compression} || $GL_VERSION >= 1.3; |
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$GL_MULTITEX = $GL_EXT{GL_ARB_multitexture} || $GL_VERSION >= 1.3; |
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$GL_MULTITEX &&= 2 <= glGetInteger GL_MAX_TEXTURE_UNITS; |
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|
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$GL_COMPRESS = 0 if DC::OpenGL::gl_vendor eq "Apple Computer, Inc."; # there is no end to their suckage |
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|
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$APPLE_NVIDIA_BUG = DC::OpenGL::gl_vendor eq "NVIDIA Corporation" && $^O eq "darwin"; |
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apple_nvidia_bug $APPLE_NVIDIA_BUG; |
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|
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disable_GL_EXT_blend_func_separate |
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unless $GL_BFSEP; |
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|
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glDisable GL_COLOR_MATERIAL; |
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glShadeModel GL_FLAT; |
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glDisable GL_DITHER; |
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glDisable GL_DEPTH_TEST; |
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glDepthMask 0; |
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|
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my $hint = $::FAST ? GL_FASTEST : GL_NICEST; |
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glHint GL_PERSPECTIVE_CORRECTION_HINT, $hint; |
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glHint GL_POINT_SMOOTH_HINT , $hint; |
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glHint GL_LINE_SMOOTH_HINT , $hint; |
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glHint GL_POLYGON_SMOOTH_HINT , $hint; |
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glHint GL_GENERATE_MIPMAP_HINT , $hint; |
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glHint GL_TEXTURE_COMPRESSION_HINT , $hint; |
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#glDrawBuffer GL_BACK; |
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#glReadBuffer GL_BACK; |
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|
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c_init; |
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$_->() for values %INIT_HOOK; |
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} |
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|
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sub quit { |
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undef $GL_VERSION; |
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undef %GL_EXT; |
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} |
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|
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sub shutdown { |
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$_->() for values %SHUTDOWN_HOOK; |
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|
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quit; |
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} |
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|
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sub gl_check { |
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return unless $DEBUG; |
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|
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if (my $error = glGetError) { |
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my ($format, @args) = @_; |
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Carp::cluck sprintf "opengl error %x while $format", $error, @args; |
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} |
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} |
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|
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1; |
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