michael@0: $usage = "Usage: combine.pl { 8 | 16 } < pixman-combine.c.template";
michael@0: 
michael@0: $#ARGV == 0 or die $usage;
michael@0: 
michael@0: # Get the component size.
michael@0: $size = int($ARGV[0]);
michael@0: $size == 8 or $size == 16 or die $usage;
michael@0: 
michael@0: $pixel_size = $size * 4;
michael@0: $half_pixel_size = $size * 2;
michael@0: 
michael@0: sub mask {
michael@0:     my $str = shift;
michael@0:     my $suffix;
michael@0:     $suffix = "ULL" if $size > 8;
michael@0: 
michael@0:     return "0x" . $str . $suffix;
michael@0: }
michael@0: 
michael@0: # Generate mask strings.
michael@0: $nibbles = $size / 4;
michael@0: $mask = "f" x $nibbles;
michael@0: $zero_mask = "0" x $nibbles;
michael@0: $one_half = "8" . "0" x ($nibbles - 1);
michael@0: 
michael@0: print "/* WARNING: This file is generated by combine.pl from combine.inc.\n";
michael@0: print "   Please edit one of those files rather than this one. */\n";
michael@0: print "\n";
michael@0: 
michael@0: print "#line 1 \"pixman-combine.c.template\"\n";
michael@0: 
michael@0: $mask_ = mask($mask);
michael@0: $one_half_ = mask($one_half);
michael@0: $g_mask = mask($mask . $zero_mask);
michael@0: $b_mask = mask($mask . $zero_mask x 2);
michael@0: $a_mask = mask($mask . $zero_mask x 3);
michael@0: $rb_mask = mask($mask . $zero_mask . $mask);
michael@0: $ag_mask = mask($mask . $zero_mask . $mask . $zero_mask);
michael@0: $rb_one_half = mask($one_half . $zero_mask . $one_half);
michael@0: $rb_mask_plus_one = mask("1" . $zero_mask x 2 . "1" .  $zero_mask);
michael@0: 
michael@0: while (<STDIN>) {
michael@0:     # Mask and 1/2 value for a single component.
michael@0:     s/#define COMPONENT_SIZE\b/$& $size/;
michael@0:     s/#define MASK\b/$& $mask_/;
michael@0:     s/#define ONE_HALF\b/$& $one_half_/;
michael@0: 
michael@0:     # Shifts and masks for green, blue, and alpha.
michael@0:     s/#define G_SHIFT\b/$& $size/;
michael@0:     s/#define R_SHIFT\b/$& $size * 2/;
michael@0:     s/#define A_SHIFT\b/$& $size * 3/;
michael@0:     s/#define G_MASK\b/$& $g_mask/;
michael@0:     s/#define R_MASK\b/$& $b_mask/;
michael@0:     s/#define A_MASK\b/$& $a_mask/;
michael@0: 
michael@0:     # Special values for dealing with red + blue at the same time.
michael@0:     s/#define RB_MASK\b/$& $rb_mask/;
michael@0:     s/#define AG_MASK\b/$& $ag_mask/;
michael@0:     s/#define RB_ONE_HALF\b/$& $rb_one_half/;
michael@0:     s/#define RB_MASK_PLUS_ONE\b/$& $rb_mask_plus_one/;
michael@0: 
michael@0:     # Add 32/64 suffix to combining function types.
michael@0:     s/\bCombineFunc\b/CombineFunc$pixel_size/;
michael@0:     s/\bFbComposeFunctions\b/FbComposeFunctions$pixel_size/;
michael@0:     s/combine_width/combine_$pixel_size/;
michael@0:     s/_pixman_setup_combiner_functions_width/_pixman_setup_combiner_functions_$pixel_size/;
michael@0:     s/UNc/UN$size/g;
michael@0:     s/ALPHA_c/ALPHA_$size/g;
michael@0:     s/RED_c/RED_$size/g;
michael@0:     s/GREEN_c/GREEN_$size/g;
michael@0:     s/BLUE_c/BLUE_$size/g;
michael@0: 
michael@0:     # Convert comp*_t values into the appropriate real types.
michael@0:     s/comp1_t/uint${size}_t/g;
michael@0:     s/comp2_t/uint${half_pixel_size}_t/g;
michael@0:     s/comp4_t/uint${pixel_size}_t/g;
michael@0: 
michael@0:     # Change the function table name for the 64-bit version.
michael@0:     s/pixman_composeFunctions/pixman_composeFunctions64/ if $size == 16;
michael@0: 
michael@0:     # Change the header for the 64-bit version
michael@0:     s/pixman-combine.h/pixman-combine64.h/ if $size == 16;
michael@0:     s/pixman-combine.h/pixman-combine32.h/ if $size == 8;
michael@0: 
michael@0:     print;
michael@0: }