/* ______ ___ ___ * /\ _ \ /\_ \ /\_ \ * \ \ \L\ \\//\ \ \//\ \ __ __ _ __ ___ * \ \ __ \ \ \ \ \ \ \ /'__`\ /'_ `\/\`'__\/ __`\ * \ \ \/\ \ \_\ \_ \_\ \_/\ __//\ \L\ \ \ \//\ \L\ \ * \ \_\ \_\/\____\/\____\ \____\ \____ \ \_\\ \____/ * \/_/\/_/\/____/\/____/\/____/\/___L\ \/_/ \/___/ * /\____/ * \_/__/ * By Shawn Hargreaves * shawn@talula.demon.co.uk * http://www.talula.demon.co.uk/allegro/ * * Interpolation routines for 24 and 32 bit truecolor pixels. * * Optimised by Burton Radons. * * See readme.txt for copyright information. */ #include #include "allegro.h" #if (defined ALLEGRO_COLOR24) || (defined ALLEGRO_COLOR32) #define BLEND(n) \ static unsigned long blend24_##n(unsigned long x, unsigned long y) \ { \ unsigned long res, g; \ \ res = (((x & 0xFF00FF) - (y & 0xFF00FF)) * \ (n*256/255) / 256 + y) & 0xFF00FF; \ \ g = (((x & 0xFF00) - (y & 0xFF00)) * \ (n*256/255) / 256 + y) & 0xFF00; \ \ return res | g; \ } /* declare 256 interpolation functions (one for each alpha) */ BLEND(0) BLEND(1) BLEND(2) BLEND(3) BLEND(4) BLEND(5) BLEND(6) BLEND(7) BLEND(8) BLEND(9) BLEND(10) BLEND(11) BLEND(12) BLEND(13) BLEND(14) BLEND(15) BLEND(16) BLEND(17) BLEND(18) BLEND(19) BLEND(20) BLEND(21) BLEND(22) BLEND(23) BLEND(24) BLEND(25) BLEND(26) BLEND(27) BLEND(28) BLEND(29) BLEND(30) BLEND(31) BLEND(32) BLEND(33) BLEND(34) BLEND(35) BLEND(36) BLEND(37) BLEND(38) BLEND(39) BLEND(40) BLEND(41) BLEND(42) BLEND(43) BLEND(44) BLEND(45) BLEND(46) BLEND(47) BLEND(48) BLEND(49) BLEND(50) BLEND(51) BLEND(52) BLEND(53) BLEND(54) BLEND(55) BLEND(56) BLEND(57) BLEND(58) BLEND(59) BLEND(60) BLEND(61) BLEND(62) BLEND(63) BLEND(64) BLEND(65) BLEND(66) BLEND(67) BLEND(68) BLEND(69) BLEND(70) BLEND(71) BLEND(72) BLEND(73) BLEND(74) BLEND(75) BLEND(76) BLEND(77) BLEND(78) BLEND(79) BLEND(80) BLEND(81) BLEND(82) BLEND(83) BLEND(84) BLEND(85) BLEND(86) BLEND(87) BLEND(88) BLEND(89) BLEND(90) BLEND(91) BLEND(92) BLEND(93) BLEND(94) BLEND(95) BLEND(96) BLEND(97) BLEND(98) BLEND(99) BLEND(100) BLEND(101) BLEND(102) BLEND(103) BLEND(104) BLEND(105) BLEND(106) BLEND(107) BLEND(108) BLEND(109) BLEND(110) BLEND(111) BLEND(112) BLEND(113) BLEND(114) BLEND(115) BLEND(116) BLEND(117) BLEND(118) BLEND(119) BLEND(120) BLEND(121) BLEND(122) BLEND(123) BLEND(124) BLEND(125) BLEND(126) BLEND(127) BLEND(128) BLEND(129) BLEND(130) BLEND(131) BLEND(132) BLEND(133) BLEND(134) BLEND(135) BLEND(136) BLEND(137) BLEND(138) BLEND(139) BLEND(140) BLEND(141) BLEND(142) BLEND(143) BLEND(144) BLEND(145) BLEND(146) BLEND(147) BLEND(148) BLEND(149) BLEND(150) BLEND(151) BLEND(152) BLEND(153) BLEND(154) BLEND(155) BLEND(156) BLEND(157) BLEND(158) BLEND(159) BLEND(160) BLEND(161) BLEND(162) BLEND(163) BLEND(164) BLEND(165) BLEND(166) BLEND(167) BLEND(168) BLEND(169) BLEND(170) BLEND(171) BLEND(172) BLEND(173) BLEND(174) BLEND(175) BLEND(176) BLEND(177) BLEND(178) BLEND(179) BLEND(180) BLEND(181) BLEND(182) BLEND(183) BLEND(184) BLEND(185) BLEND(186) BLEND(187) BLEND(188) BLEND(189) BLEND(190) BLEND(191) BLEND(192) BLEND(193) BLEND(194) BLEND(195) BLEND(196) BLEND(197) BLEND(198) BLEND(199) BLEND(200) BLEND(201) BLEND(202) BLEND(203) BLEND(204) BLEND(205) BLEND(206) BLEND(207) BLEND(208) BLEND(209) BLEND(210) BLEND(211) BLEND(212) BLEND(213) BLEND(214) BLEND(215) BLEND(216) BLEND(217) BLEND(218) BLEND(219) BLEND(220) BLEND(221) BLEND(222) BLEND(223) BLEND(224) BLEND(225) BLEND(226) BLEND(227) BLEND(228) BLEND(229) BLEND(230) BLEND(231) BLEND(232) BLEND(233) BLEND(234) BLEND(235) BLEND(236) BLEND(237) BLEND(238) BLEND(239) BLEND(240) BLEND(241) BLEND(242) BLEND(243) BLEND(244) BLEND(245) BLEND(246) BLEND(247) BLEND(248) BLEND(249) BLEND(250) BLEND(251) BLEND(252) BLEND(253) BLEND(254) BLEND(255) /* and list them all in a table */ BLENDER_MAP _trans_blender24 = { { blend24_0, blend24_1, blend24_2, blend24_3, blend24_4, blend24_5, blend24_6, blend24_7, blend24_8, blend24_9, blend24_10, blend24_11, blend24_12, blend24_13, blend24_14, blend24_15, blend24_16, blend24_17, blend24_18, blend24_19, blend24_20, blend24_21, blend24_22, blend24_23, blend24_24, blend24_25, blend24_26, blend24_27, blend24_28, blend24_29, blend24_30, blend24_31, blend24_32, blend24_33, blend24_34, blend24_35, blend24_36, blend24_37, blend24_38, blend24_39, blend24_40, blend24_41, blend24_42, blend24_43, blend24_44, blend24_45, blend24_46, blend24_47, blend24_48, blend24_49, blend24_50, blend24_51, blend24_52, blend24_53, blend24_54, blend24_55, blend24_56, blend24_57, blend24_58, blend24_59, blend24_60, blend24_61, blend24_62, blend24_63, blend24_64, blend24_65, blend24_66, blend24_67, blend24_68, blend24_69, blend24_70, blend24_71, blend24_72, blend24_73, blend24_74, blend24_75, blend24_76, blend24_77, blend24_78, blend24_79, blend24_80, blend24_81, blend24_82, blend24_83, blend24_84, blend24_85, blend24_86, blend24_87, blend24_88, blend24_89, blend24_90, blend24_91, blend24_92, blend24_93, blend24_94, blend24_95, blend24_96, blend24_97, blend24_98, blend24_99, blend24_100, blend24_101, blend24_102, blend24_103, blend24_104, blend24_105, blend24_106, blend24_107, blend24_108, blend24_109, blend24_110, blend24_111, blend24_112, blend24_113, blend24_114, blend24_115, blend24_116, blend24_117, blend24_118, blend24_119, blend24_120, blend24_121, blend24_122, blend24_123, blend24_124, blend24_125, blend24_126, blend24_127, blend24_128, blend24_129, blend24_130, blend24_131, blend24_132, blend24_133, blend24_134, blend24_135, blend24_136, blend24_137, blend24_138, blend24_139, blend24_140, blend24_141, blend24_142, blend24_143, blend24_144, blend24_145, blend24_146, blend24_147, blend24_148, blend24_149, blend24_150, blend24_151, blend24_152, blend24_153, blend24_154, blend24_155, blend24_156, blend24_157, blend24_158, blend24_159, blend24_160, blend24_161, blend24_162, blend24_163, blend24_164, blend24_165, blend24_166, blend24_167, blend24_168, blend24_169, blend24_170, blend24_171, blend24_172, blend24_173, blend24_174, blend24_175, blend24_176, blend24_177, blend24_178, blend24_179, blend24_180, blend24_181, blend24_182, blend24_183, blend24_184, blend24_185, blend24_186, blend24_187, blend24_188, blend24_189, blend24_190, blend24_191, blend24_192, blend24_193, blend24_194, blend24_195, blend24_196, blend24_197, blend24_198, blend24_199, blend24_200, blend24_201, blend24_202, blend24_203, blend24_204, blend24_205, blend24_206, blend24_207, blend24_208, blend24_209, blend24_210, blend24_211, blend24_212, blend24_213, blend24_214, blend24_215, blend24_216, blend24_217, blend24_218, blend24_219, blend24_220, blend24_221, blend24_222, blend24_223, blend24_224, blend24_225, blend24_226, blend24_227, blend24_228, blend24_229, blend24_230, blend24_231, blend24_232, blend24_233, blend24_234, blend24_235, blend24_236, blend24_237, blend24_238, blend24_239, blend24_240, blend24_241, blend24_242, blend24_243, blend24_244, blend24_245, blend24_246, blend24_247, blend24_248, blend24_249, blend24_250, blend24_251, blend24_252, blend24_253, blend24_254, blend24_255, } }; /* use these routines */ #define TB24 &_trans_blender24 #else /* no 24/32 bit code */ #define TB24 NULL #endif #ifdef ALLEGRO_COLOR16 /* use 15/16 bit blenders from other files */ extern BLENDER_MAP _trans_blender15; extern BLENDER_MAP _trans_blender16; #define TB15 &_trans_blender15 #define TB16 &_trans_blender16 #else /* no 15/16 bit code */ #define TB15 NULL #define TB16 NULL #endif /* set_trans_blender: * Selects a translucent pixel blending mode for truecolor pixels, using * the specified light color (when drawing lit sprites), or alpha (when * using a translucent drawing mode). */ void set_trans_blender(int r, int g, int b, int a) { set_blender_mode(TB15, TB16, TB24, r, g, b, a); }