2021-04-17 23:35:25 -04:00
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#!/usr/bin/perl -w
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#
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# A script to generate optimized C blitters for Simple DirectMedia Layer
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# http://www.libsdl.org/
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use warnings;
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use strict;
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my %file;
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# The formats potentially supported by this script:
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# SDL_PIXELFORMAT_RGB332
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# SDL_PIXELFORMAT_RGB444
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# SDL_PIXELFORMAT_RGB555
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# SDL_PIXELFORMAT_ARGB4444
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# SDL_PIXELFORMAT_ARGB1555
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# SDL_PIXELFORMAT_RGB565
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# SDL_PIXELFORMAT_RGB24
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# SDL_PIXELFORMAT_BGR24
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# SDL_PIXELFORMAT_RGB888
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# SDL_PIXELFORMAT_BGR888
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# SDL_PIXELFORMAT_ARGB8888
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# SDL_PIXELFORMAT_RGBA8888
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# SDL_PIXELFORMAT_ABGR8888
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# SDL_PIXELFORMAT_BGRA8888
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# SDL_PIXELFORMAT_ARGB2101010
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# The formats we're actually creating blitters for:
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my @src_formats = (
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"RGB888",
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"BGR888",
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"ARGB8888",
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"RGBA8888",
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"ABGR8888",
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"BGRA8888",
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);
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my @dst_formats = (
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"RGB888",
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"BGR888",
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"ARGB8888",
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);
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my %format_size = (
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"RGB888" => 4,
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"BGR888" => 4,
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"ARGB8888" => 4,
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"RGBA8888" => 4,
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"ABGR8888" => 4,
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"BGRA8888" => 4,
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);
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my %format_type = (
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"RGB888" => "Uint32",
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"BGR888" => "Uint32",
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"ARGB8888" => "Uint32",
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"RGBA8888" => "Uint32",
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"ABGR8888" => "Uint32",
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"BGRA8888" => "Uint32",
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);
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my %get_rgba_string_ignore_alpha = (
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"RGB888" => "_R = (Uint8)(_pixel >> 16); _G = (Uint8)(_pixel >> 8); _B = (Uint8)_pixel;",
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"BGR888" => "_B = (Uint8)(_pixel >> 16); _G = (Uint8)(_pixel >> 8); _R = (Uint8)_pixel;",
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"ARGB8888" => "_R = (Uint8)(_pixel >> 16); _G = (Uint8)(_pixel >> 8); _B = (Uint8)_pixel;",
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"RGBA8888" => "_R = (Uint8)(_pixel >> 24); _G = (Uint8)(_pixel >> 16); _B = (Uint8)(_pixel >> 8);",
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"ABGR8888" => "_B = (Uint8)(_pixel >> 16); _G = (Uint8)(_pixel >> 8); _R = (Uint8)_pixel;",
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"BGRA8888" => "_B = (Uint8)(_pixel >> 24); _G = (Uint8)(_pixel >> 16); _R = (Uint8)(_pixel >> 8);",
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);
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my %get_rgba_string = (
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"RGB888" => $get_rgba_string_ignore_alpha{"RGB888"},
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"BGR888" => $get_rgba_string_ignore_alpha{"BGR888"},
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"ARGB8888" => $get_rgba_string_ignore_alpha{"ARGB8888"} . " _A = (Uint8)(_pixel >> 24);",
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"RGBA8888" => $get_rgba_string_ignore_alpha{"RGBA8888"} . " _A = (Uint8)_pixel;",
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"ABGR8888" => $get_rgba_string_ignore_alpha{"ABGR8888"} . " _A = (Uint8)(_pixel >> 24);",
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"BGRA8888" => $get_rgba_string_ignore_alpha{"BGRA8888"} . " _A = (Uint8)_pixel;",
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);
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my %set_rgba_string = (
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"RGB888" => "_pixel = (_R << 16) | (_G << 8) | _B;",
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"BGR888" => "_pixel = (_B << 16) | (_G << 8) | _R;",
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"ARGB8888" => "_pixel = (_A << 24) | (_R << 16) | (_G << 8) | _B;",
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"RGBA8888" => "_pixel = (_R << 24) | (_G << 16) | (_B << 8) | _A;",
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"ABGR8888" => "_pixel = (_A << 24) | (_B << 16) | (_G << 8) | _R;",
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"BGRA8888" => "_pixel = (_B << 24) | (_G << 16) | (_R << 8) | _A;",
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);
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sub open_file {
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my $name = shift;
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open(FILE, ">$name.new") || die "Cant' open $name.new: $!";
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print FILE <<__EOF__;
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/* DO NOT EDIT! This file is generated by sdlgenblit.pl */
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/*
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Simple DirectMedia Layer
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2021-05-09 05:30:38 -04:00
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Copyright (C) 1997-2021 Sam Lantinga <slouken\@libsdl.org>
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2021-04-17 23:35:25 -04:00
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../SDL_internal.h"
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#if SDL_HAVE_BLIT_AUTO
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/* *INDENT-OFF* */
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__EOF__
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}
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sub close_file {
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my $name = shift;
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print FILE <<__EOF__;
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/* *INDENT-ON* */
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#endif /* SDL_HAVE_BLIT_AUTO */
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/* vi: set ts=4 sw=4 expandtab: */
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__EOF__
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close FILE;
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if ( ! -f $name || system("cmp -s $name $name.new") != 0 ) {
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rename("$name.new", "$name");
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} else {
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unlink("$name.new");
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}
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}
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sub output_copydefs
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{
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print FILE <<__EOF__;
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extern SDL_BlitFuncEntry SDL_GeneratedBlitFuncTable[];
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__EOF__
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}
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sub output_copyfuncname
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{
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my $prefix = shift;
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my $src = shift;
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my $dst = shift;
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my $modulate = shift;
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my $blend = shift;
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my $scale = shift;
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my $args = shift;
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my $suffix = shift;
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print FILE "$prefix SDL_Blit_${src}_${dst}";
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if ( $modulate ) {
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print FILE "_Modulate";
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}
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if ( $blend ) {
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print FILE "_Blend";
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}
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if ( $scale ) {
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print FILE "_Scale";
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}
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if ( $args ) {
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print FILE "(SDL_BlitInfo *info)";
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}
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print FILE "$suffix";
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}
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sub get_rgba
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{
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my $prefix = shift;
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my $format = shift;
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my $ignore_alpha = shift;
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my $string;
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if ($ignore_alpha) {
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$string = $get_rgba_string_ignore_alpha{$format};
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} else {
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$string = $get_rgba_string{$format};
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}
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$string =~ s/_/$prefix/g;
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if ( $prefix ne "" ) {
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print FILE <<__EOF__;
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${prefix}pixel = *$prefix;
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__EOF__
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} else {
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print FILE <<__EOF__;
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pixel = *src;
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__EOF__
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}
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print FILE <<__EOF__;
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$string
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__EOF__
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}
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sub set_rgba
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{
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my $prefix = shift;
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my $format = shift;
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my $string = $set_rgba_string{$format};
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$string =~ s/_/$prefix/g;
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print FILE <<__EOF__;
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$string
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*dst = ${prefix}pixel;
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__EOF__
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}
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sub output_copycore
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{
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my $src = shift;
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my $dst = shift;
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my $modulate = shift;
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my $blend = shift;
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my $is_modulateA_done = shift;
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my $A_is_const_FF = shift;
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my $s = "";
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my $d = "";
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# Nice and easy...
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if ( $src eq $dst && !$modulate && !$blend ) {
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print FILE <<__EOF__;
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*dst = *src;
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__EOF__
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return;
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}
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my $dst_has_alpha = ($dst =~ /A/) ? 1 : 0;
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my $ignore_dst_alpha = !$dst_has_alpha && !$blend;
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if ( $blend ) {
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get_rgba("src", $src, $ignore_dst_alpha);
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get_rgba("dst", $dst, !$dst_has_alpha);
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$s = "src";
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$d = "dst";
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} else {
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get_rgba("", $src, $ignore_dst_alpha);
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}
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if ( $modulate ) {
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print FILE <<__EOF__;
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if (flags & SDL_COPY_MODULATE_COLOR) {
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${s}R = (${s}R * modulateR) / 255;
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${s}G = (${s}G * modulateG) / 255;
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${s}B = (${s}B * modulateB) / 255;
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}
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__EOF__
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if (!$ignore_dst_alpha && !$is_modulateA_done) {
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print FILE <<__EOF__;
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if (flags & SDL_COPY_MODULATE_ALPHA) {
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${s}A = (${s}A * modulateA) / 255;
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}
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__EOF__
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}
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}
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if ( $blend ) {
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if (!$A_is_const_FF) {
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print FILE <<__EOF__;
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if (flags & (SDL_COPY_BLEND|SDL_COPY_ADD)) {
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/* This goes away if we ever use premultiplied alpha */
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if (${s}A < 255) {
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${s}R = (${s}R * ${s}A) / 255;
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${s}G = (${s}G * ${s}A) / 255;
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${s}B = (${s}B * ${s}A) / 255;
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}
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}
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__EOF__
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}
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print FILE <<__EOF__;
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switch (flags & (SDL_COPY_BLEND|SDL_COPY_ADD|SDL_COPY_MOD|SDL_COPY_MUL)) {
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case SDL_COPY_BLEND:
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__EOF__
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if ($A_is_const_FF) {
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print FILE <<__EOF__;
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${d}R = ${s}R;
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${d}G = ${s}G;
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${d}B = ${s}B;
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__EOF__
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} else {
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print FILE <<__EOF__;
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${d}R = ${s}R + ((255 - ${s}A) * ${d}R) / 255;
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${d}G = ${s}G + ((255 - ${s}A) * ${d}G) / 255;
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${d}B = ${s}B + ((255 - ${s}A) * ${d}B) / 255;
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__EOF__
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}
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if ( $dst_has_alpha ) {
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if ($A_is_const_FF) {
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print FILE <<__EOF__;
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${d}A = 0xFF;
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__EOF__
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} else {
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print FILE <<__EOF__;
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${d}A = ${s}A + ((255 - ${s}A) * ${d}A) / 255;
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__EOF__
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}
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}
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print FILE <<__EOF__;
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break;
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case SDL_COPY_ADD:
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${d}R = ${s}R + ${d}R; if (${d}R > 255) ${d}R = 255;
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${d}G = ${s}G + ${d}G; if (${d}G > 255) ${d}G = 255;
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${d}B = ${s}B + ${d}B; if (${d}B > 255) ${d}B = 255;
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break;
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case SDL_COPY_MOD:
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${d}R = (${s}R * ${d}R) / 255;
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${d}G = (${s}G * ${d}G) / 255;
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${d}B = (${s}B * ${d}B) / 255;
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break;
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case SDL_COPY_MUL:
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__EOF__
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if ($A_is_const_FF) {
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print FILE <<__EOF__;
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${d}R = (${s}R * ${d}R) / 255;
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${d}G = (${s}G * ${d}G) / 255;
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${d}B = (${s}B * ${d}B) / 255;
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__EOF__
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} else {
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print FILE <<__EOF__;
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${d}R = ((${s}R * ${d}R) + (${d}R * (255 - ${s}A))) / 255; if (${d}R > 255) ${d}R = 255;
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${d}G = ((${s}G * ${d}G) + (${d}G * (255 - ${s}A))) / 255; if (${d}G > 255) ${d}G = 255;
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${d}B = ((${s}B * ${d}B) + (${d}B * (255 - ${s}A))) / 255; if (${d}B > 255) ${d}B = 255;
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__EOF__
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}
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if ( $dst_has_alpha ) {
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if ($A_is_const_FF) {
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print FILE <<__EOF__;
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${d}A = 0xFF;
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__EOF__
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} else {
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print FILE <<__EOF__;
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${d}A = ((${s}A * ${d}A) + (${d}A * (255 - ${s}A))) / 255; if (${d}A > 255) ${d}A = 255;
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__EOF__
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}
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}
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print FILE <<__EOF__;
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break;
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}
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__EOF__
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}
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if ( $blend ) {
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set_rgba("dst", $dst);
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} else {
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set_rgba("", $dst);
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}
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}
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sub output_copyfunc
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{
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my $src = shift;
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my $dst = shift;
|
|
|
|
my $modulate = shift;
|
|
|
|
my $blend = shift;
|
|
|
|
my $scale = shift;
|
|
|
|
|
|
|
|
my $dst_has_alpha = ($dst =~ /A/) ? 1 : 0;
|
|
|
|
my $ignore_dst_alpha = !$dst_has_alpha && !$blend;
|
|
|
|
|
|
|
|
my $src_has_alpha = ($src =~ /A/) ? 1 : 0;
|
|
|
|
|
|
|
|
my $is_modulateA_done = 0;
|
|
|
|
my $A_is_const_FF = 0;
|
|
|
|
|
|
|
|
output_copyfuncname("static void", $src, $dst, $modulate, $blend, $scale, 1, "\n");
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
{
|
|
|
|
__EOF__
|
|
|
|
if ( $modulate || $blend ) {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
const int flags = info->flags;
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
if ( $modulate ) {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
const Uint32 modulateR = info->r;
|
|
|
|
const Uint32 modulateG = info->g;
|
|
|
|
const Uint32 modulateB = info->b;
|
|
|
|
__EOF__
|
|
|
|
if (!$ignore_dst_alpha) {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
const Uint32 modulateA = info->a;
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( $blend ) {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 srcpixel;
|
|
|
|
__EOF__
|
|
|
|
if (!$ignore_dst_alpha && !$src_has_alpha) {
|
|
|
|
if ($modulate){
|
|
|
|
$is_modulateA_done = 1;
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
const Uint32 srcA = (flags & SDL_COPY_MODULATE_ALPHA) ? modulateA : 0xFF;
|
|
|
|
__EOF__
|
|
|
|
} else {
|
|
|
|
$A_is_const_FF = 1;
|
|
|
|
}
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 srcR, srcG, srcB;
|
|
|
|
__EOF__
|
|
|
|
} else {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 srcR, srcG, srcB, srcA;
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 dstpixel;
|
|
|
|
__EOF__
|
|
|
|
if ($dst_has_alpha) {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 dstR, dstG, dstB, dstA;
|
|
|
|
__EOF__
|
|
|
|
} else {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 dstR, dstG, dstB;
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
} elsif ( $modulate || $src ne $dst ) {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 pixel;
|
|
|
|
__EOF__
|
|
|
|
if (!$ignore_dst_alpha && !$src_has_alpha) {
|
|
|
|
if ($modulate){
|
|
|
|
$is_modulateA_done = 1;
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
const Uint32 A = (flags & SDL_COPY_MODULATE_ALPHA) ? modulateA : 0xFF;
|
|
|
|
__EOF__
|
|
|
|
} else {
|
|
|
|
$A_is_const_FF = 1;
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
const Uint32 A = 0xFF;
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 R, G, B;
|
|
|
|
__EOF__
|
|
|
|
} elsif (!$ignore_dst_alpha) {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 R, G, B, A;
|
|
|
|
__EOF__
|
|
|
|
} else {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
Uint32 R, G, B;
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( $scale ) {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
int srcy, srcx;
|
2021-05-09 05:30:38 -04:00
|
|
|
Uint32 posy, posx;
|
2021-04-17 23:35:25 -04:00
|
|
|
int incy, incx;
|
|
|
|
__EOF__
|
|
|
|
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
|
|
|
|
incy = (info->src_h << 16) / info->dst_h;
|
|
|
|
incx = (info->src_w << 16) / info->dst_w;
|
2021-05-09 05:30:38 -04:00
|
|
|
posy = incy / 2;
|
2021-04-17 23:35:25 -04:00
|
|
|
|
|
|
|
while (info->dst_h--) {
|
|
|
|
$format_type{$src} *src = 0;
|
|
|
|
$format_type{$dst} *dst = ($format_type{$dst} *)info->dst;
|
|
|
|
int n = info->dst_w;
|
2021-05-09 05:30:38 -04:00
|
|
|
posx = incx / 2;
|
|
|
|
|
|
|
|
srcy = posy >> 16;
|
2021-04-17 23:35:25 -04:00
|
|
|
while (n--) {
|
2021-05-09 05:30:38 -04:00
|
|
|
srcx = posx >> 16;
|
|
|
|
src = ($format_type{$src} *)(info->src + (srcy * info->src_pitch) + (srcx * $format_size{$src}));
|
2021-04-17 23:35:25 -04:00
|
|
|
__EOF__
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
__EOF__
|
|
|
|
output_copycore($src, $dst, $modulate, $blend, $is_modulateA_done, $A_is_const_FF);
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
posx += incx;
|
|
|
|
++dst;
|
|
|
|
}
|
|
|
|
posy += incy;
|
|
|
|
info->dst += info->dst_pitch;
|
|
|
|
}
|
|
|
|
__EOF__
|
|
|
|
} else {
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
|
|
|
|
while (info->dst_h--) {
|
|
|
|
$format_type{$src} *src = ($format_type{$src} *)info->src;
|
|
|
|
$format_type{$dst} *dst = ($format_type{$dst} *)info->dst;
|
|
|
|
int n = info->dst_w;
|
|
|
|
while (n--) {
|
|
|
|
__EOF__
|
|
|
|
output_copycore($src, $dst, $modulate, $blend, $is_modulateA_done, $A_is_const_FF);
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
++src;
|
|
|
|
++dst;
|
|
|
|
}
|
|
|
|
info->src += info->src_pitch;
|
|
|
|
info->dst += info->dst_pitch;
|
|
|
|
}
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
}
|
|
|
|
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
|
|
|
|
sub output_copyfunc_h
|
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
sub output_copyinc
|
|
|
|
{
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
#include "SDL_video.h"
|
|
|
|
#include "SDL_blit.h"
|
|
|
|
#include "SDL_blit_auto.h"
|
|
|
|
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
|
|
|
|
sub output_copyfunctable
|
|
|
|
{
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
SDL_BlitFuncEntry SDL_GeneratedBlitFuncTable[] = {
|
|
|
|
__EOF__
|
|
|
|
for (my $i = 0; $i <= $#src_formats; ++$i) {
|
|
|
|
my $src = $src_formats[$i];
|
|
|
|
for (my $j = 0; $j <= $#dst_formats; ++$j) {
|
|
|
|
my $dst = $dst_formats[$j];
|
|
|
|
for (my $modulate = 0; $modulate <= 1; ++$modulate) {
|
|
|
|
for (my $blend = 0; $blend <= 1; ++$blend) {
|
|
|
|
for (my $scale = 0; $scale <= 1; ++$scale) {
|
|
|
|
if ( $modulate || $blend || $scale ) {
|
|
|
|
print FILE " { SDL_PIXELFORMAT_$src, SDL_PIXELFORMAT_$dst, ";
|
|
|
|
my $flags = "";
|
|
|
|
my $flag = "";
|
|
|
|
if ( $modulate ) {
|
|
|
|
$flag = "SDL_COPY_MODULATE_COLOR | SDL_COPY_MODULATE_ALPHA";
|
|
|
|
if ( $flags eq "" ) {
|
|
|
|
$flags = $flag;
|
|
|
|
} else {
|
|
|
|
$flags = "$flags | $flag";
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( $blend ) {
|
|
|
|
$flag = "SDL_COPY_BLEND | SDL_COPY_ADD | SDL_COPY_MOD | SDL_COPY_MUL";
|
|
|
|
if ( $flags eq "" ) {
|
|
|
|
$flags = $flag;
|
|
|
|
} else {
|
|
|
|
$flags = "$flags | $flag";
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( $scale ) {
|
|
|
|
$flag = "SDL_COPY_NEAREST";
|
|
|
|
if ( $flags eq "" ) {
|
|
|
|
$flags = $flag;
|
|
|
|
} else {
|
|
|
|
$flags = "$flags | $flag";
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( $flags eq "" ) {
|
|
|
|
$flags = "0";
|
|
|
|
}
|
|
|
|
print FILE "($flags), SDL_CPU_ANY,";
|
|
|
|
output_copyfuncname("", $src_formats[$i], $dst_formats[$j], $modulate, $blend, $scale, 0, " },\n");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
print FILE <<__EOF__;
|
|
|
|
{ 0, 0, 0, 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
__EOF__
|
|
|
|
}
|
|
|
|
|
|
|
|
sub output_copyfunc_c
|
|
|
|
{
|
|
|
|
my $src = shift;
|
|
|
|
my $dst = shift;
|
|
|
|
|
|
|
|
for (my $modulate = 0; $modulate <= 1; ++$modulate) {
|
|
|
|
for (my $blend = 0; $blend <= 1; ++$blend) {
|
|
|
|
for (my $scale = 0; $scale <= 1; ++$scale) {
|
|
|
|
if ( $modulate || $blend || $scale ) {
|
|
|
|
output_copyfunc($src, $dst, $modulate, $blend, $scale);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
open_file("SDL_blit_auto.h");
|
|
|
|
output_copydefs();
|
|
|
|
for (my $i = 0; $i <= $#src_formats; ++$i) {
|
|
|
|
for (my $j = 0; $j <= $#dst_formats; ++$j) {
|
|
|
|
output_copyfunc_h($src_formats[$i], $dst_formats[$j]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
print FILE "\n";
|
|
|
|
close_file("SDL_blit_auto.h");
|
|
|
|
|
|
|
|
open_file("SDL_blit_auto.c");
|
|
|
|
output_copyinc();
|
|
|
|
for (my $i = 0; $i <= $#src_formats; ++$i) {
|
|
|
|
for (my $j = 0; $j <= $#dst_formats; ++$j) {
|
|
|
|
output_copyfunc_c($src_formats[$i], $dst_formats[$j]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
output_copyfunctable();
|
|
|
|
close_file("SDL_blit_auto.c");
|