X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=plugins%2Fgpu_senquack%2Fgpu_inner_blend.h;fp=plugins%2Fgpu_senquack%2Fgpu_inner_blend.h;h=febc7ede4318d5f38e42307d0b06799c7a7936b1;hb=0bfe8d59b9150b2662c3ca68f950b272344cb9a4;hp=0000000000000000000000000000000000000000;hpb=fcaa8d2263c8da53bbe86c482921e1a715bf59b3;p=pcsx_rearmed.git diff --git a/plugins/gpu_senquack/gpu_inner_blend.h b/plugins/gpu_senquack/gpu_inner_blend.h new file mode 100644 index 00000000..febc7ede --- /dev/null +++ b/plugins/gpu_senquack/gpu_inner_blend.h @@ -0,0 +1,188 @@ +/*************************************************************************** +* Copyright (C) 2010 PCSX4ALL Team * +* Copyright (C) 2010 Unai * +* * +* This program is free software; you can redistribute it and/or modify * +* it under the terms of the GNU General Public License as published by * +* the Free Software Foundation; either version 2 of the License, or * +* (at your option) any later version. * +* * +* This program is distributed in the hope that it will be useful, * +* but WITHOUT ANY WARRANTY; without even the implied warranty of * +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * +* GNU General Public License for more details. * +* * +* You should have received a copy of the GNU General Public License * +* along with this program; if not, write to the * +* Free Software Foundation, Inc., * +* 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA. * +***************************************************************************/ + +#ifndef _OP_BLEND_H_ +#define _OP_BLEND_H_ + +// GPU Blending operations functions + +//////////////////////////////////////////////////////////////////////////////// +// Blend bgr555 color in 'uSrc' (foreground) with bgr555 color +// in 'uDst' (background), returning resulting color. +// +// INPUT: +// 'uSrc','uDst' input: -bbbbbgggggrrrrr +// ^ bit 16 +// OUTPUT: +// u16 output: 0bbbbbgggggrrrrr +// ^ bit 16 +// RETURNS: +// Where '0' is zero-padding, and '-' is don't care +//////////////////////////////////////////////////////////////////////////////// +template +GPU_INLINE uint_fast16_t gpuBlendingGeneric(uint_fast16_t uSrc, uint_fast16_t uDst) +{ + // These use Blargg's bitwise modulo-clamping: + // http://blargg.8bitalley.com/info/rgb_mixing.html + // http://blargg.8bitalley.com/info/rgb_clamped_add.html + // http://blargg.8bitalley.com/info/rgb_clamped_sub.html + + uint_fast16_t mix; + + // 0.5 x Back + 0.5 x Forward + if (BLENDMODE==0) { +#ifdef GPU_UNAI_USE_ACCURATE_BLENDING + // Slower, but more accurate (doesn't lose LSB data) + uDst &= 0x7fff; + if (!SKIP_USRC_MSB_MASK) + uSrc &= 0x7fff; + mix = ((uSrc + uDst) - ((uSrc ^ uDst) & 0x0421)) >> 1; +#else + mix = ((uDst & 0x7bde) + (uSrc & 0x7bde)) >> 1; +#endif + } + + // 1.0 x Back + 1.0 x Forward + if (BLENDMODE==1) { + uDst &= 0x7fff; + if (!SKIP_USRC_MSB_MASK) + uSrc &= 0x7fff; + u32 sum = uSrc + uDst; + u32 low_bits = (uSrc ^ uDst) & 0x0421; + u32 carries = (sum - low_bits) & 0x8420; + u32 modulo = sum - carries; + u32 clamp = carries - (carries >> 5); + mix = modulo | clamp; + } + + // 1.0 x Back - 1.0 x Forward + if (BLENDMODE==2) { + uDst &= 0x7fff; + if (!SKIP_USRC_MSB_MASK) + uSrc &= 0x7fff; + u32 diff = uDst - uSrc + 0x8420; + u32 low_bits = (uDst ^ uSrc) & 0x8420; + u32 borrows = (diff - low_bits) & 0x8420; + u32 modulo = diff - borrows; + u32 clamp = borrows - (borrows >> 5); + mix = modulo & clamp; + } + + // 1.0 x Back + 0.25 x Forward + if (BLENDMODE==3) { + uDst &= 0x7fff; + uSrc = ((uSrc >> 2) & 0x1ce7); + u32 sum = uSrc + uDst; + u32 low_bits = (uSrc ^ uDst) & 0x0421; + u32 carries = (sum - low_bits) & 0x8420; + u32 modulo = sum - carries; + u32 clamp = carries - (carries >> 5); + mix = modulo | clamp; + } + + return mix; +} + + +//////////////////////////////////////////////////////////////////////////////// +// Convert bgr555 color in uSrc to padded u32 5.4:5.4:5.4 bgr fixed-pt +// color triplet suitable for use with HQ 24-bit quantization. +// +// INPUT: +// 'uDst' input: -bbbbbgggggrrrrr +// ^ bit 16 +// RETURNS: +// u32 output: 000bbbbbXXXX0gggggXXXX0rrrrrXXXX +// ^ bit 31 +// Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care +//////////////////////////////////////////////////////////////////////////////// +GPU_INLINE u32 gpuGetRGB24(uint_fast16_t uSrc) +{ + return ((uSrc & 0x7C00)<<14) + | ((uSrc & 0x03E0)<< 9) + | ((uSrc & 0x001F)<< 4); +} + + +//////////////////////////////////////////////////////////////////////////////// +// Blend padded u32 5.4:5.4:5.4 bgr fixed-pt color triplet in 'uSrc24' +// (foreground color) with bgr555 color in 'uDst' (background color), +// returning the resulting u32 5.4:5.4:5.4 color. +// +// INPUT: +// 'uSrc24' input: 000bbbbbXXXX0gggggXXXX0rrrrrXXXX +// ^ bit 31 +// 'uDst' input: -bbbbbgggggrrrrr +// ^ bit 16 +// RETURNS: +// u32 output: 000bbbbbXXXX0gggggXXXX0rrrrrXXXX +// ^ bit 31 +// Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care +//////////////////////////////////////////////////////////////////////////////// +template +GPU_INLINE u32 gpuBlending24(u32 uSrc24, uint_fast16_t uDst) +{ + // These use techniques adapted from Blargg's techniques mentioned in + // in gpuBlending() comments above. Not as much bitwise trickery is + // necessary because of presence of 0 padding in uSrc24 format. + + u32 uDst24 = gpuGetRGB24(uDst); + u32 mix; + + // 0.5 x Back + 0.5 x Forward + if (BLENDMODE==0) { + const u32 uMsk = 0x1FE7F9FE; + // Only need to mask LSBs of uSrc24, uDst24's LSBs are 0 already + mix = (uDst24 + (uSrc24 & uMsk)) >> 1; + } + + // 1.0 x Back + 1.0 x Forward + if (BLENDMODE==1) { + u32 sum = uSrc24 + uDst24; + u32 carries = sum & 0x20080200; + u32 modulo = sum - carries; + u32 clamp = carries - (carries >> 9); + mix = modulo | clamp; + } + + // 1.0 x Back - 1.0 x Forward + if (BLENDMODE==2) { + // Insert ones in 0-padded borrow slot of color to be subtracted from + uDst24 |= 0x20080200; + u32 diff = uDst24 - uSrc24; + u32 borrows = diff & 0x20080200; + u32 clamp = borrows - (borrows >> 9); + mix = diff & clamp; + } + + // 1.0 x Back + 0.25 x Forward + if (BLENDMODE==3) { + uSrc24 = (uSrc24 & 0x1FC7F1FC) >> 2; + u32 sum = uSrc24 + uDst24; + u32 carries = sum & 0x20080200; + u32 modulo = sum - carries; + u32 clamp = carries - (carries >> 9); + mix = modulo | clamp; + } + + return mix; +} + +#endif //_OP_BLEND_H_