237 lines
7.2 KiB
C
237 lines
7.2 KiB
C
/*
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* Glide64 - Glide video plugin for Nintendo 64 emulators.
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* Copyright (c) 2002 Dave2001
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* Copyright (c) 2003-2009 Sergey 'Gonetz' Lipski
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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//****************************************************************
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//
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// Glide64 - Glide Plugin for Nintendo 64 emulators
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// Project started on December 29th, 2001
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//
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// Authors:
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// Dave2001, original author, founded the project in 2001, left it in 2002
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// Gugaman, joined the project in 2002, left it in 2002
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// Sergey 'Gonetz' Lipski, joined the project in 2002, main author since fall of 2002
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// Hiroshi 'KoolSmoky' Morii, joined the project in 2007
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//
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//****************************************************************
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//
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// To modify Glide64:
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// * Write your name and (optional)email, commented by your work, so I know who did it, and so that you can find which parts you modified when it comes time to send it to me.
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// * Do NOT send me the whole project or file that you modified. Take out your modified code sections, and tell me where to put them. If people sent the whole thing, I would have many different versions, but no idea how to combine them all.
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//
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//****************************************************************
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//****************************************************************
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// 8-bit Horizontal Mirror
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static inline void mirror8bS(uint8_t *tex, uint8_t *start, int width, int height, int mask, int line, int full, int count)
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{
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uint8_t *v8;
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int v9;
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int v10;
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v8 = start;
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v9 = height;
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do
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{
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v10 = 0;
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do
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{
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if (width & (v10 + width))
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*v8++ = *(&tex[mask] - (mask & v10));
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else
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*v8++ = tex[mask & v10];
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++v10;
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} while (v10 != count);
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v8 += line;
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tex += full;
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--v9;
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} while (v9);
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}
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static inline void wrap8bS(uint8_t *tex, uint8_t *start, int height, int mask, int line, int full, int count)
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{
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uint32_t *v7;
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int v8;
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int v9;
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v7 = (uint32_t *)start;
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v8 = height;
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do
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{
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v9 = 0;
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do
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{
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*v7 = *(uint32_t *)&tex[4 * (mask & v9)];
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++v7;
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++v9;
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} while (v9 != count);
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v7 = (uint32_t *)((char *)v7 + line);
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tex += full;
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--v8;
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} while (v8);
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}
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static inline void clamp8bS(uint8_t *tex, uint8_t *constant, int height, int line, int full, int count)
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{
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uint8_t *v6;
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uint8_t *v7;
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int v8;
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uint8_t v9;
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int v10;
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v6 = constant;
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v7 = tex;
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v8 = height;
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do
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{
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v9 = *v6;
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v10 = count;
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do
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{
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*v7++ = v9;
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--v10;
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} while (v10);
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v6 += full;
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v7 += line;
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--v8;
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} while (v8);
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}
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void Mirror8bS(unsigned char * tex, uint32_t mask, uint32_t max_width, uint32_t real_width, uint32_t height)
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{
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if (mask == 0) return;
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uint32_t mask_width = (1 << mask);
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uint32_t mask_mask = (mask_width - 1);
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if (mask_width >= max_width) return;
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int count = max_width - mask_width;
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if (count <= 0) return;
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int line_full = real_width;
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int line = line_full - (count);
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if (line < 0) return;
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unsigned char * start = tex + (mask_width);
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mirror8bS(tex, start, mask_width, height, mask_mask, line, line_full, count);
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}
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//****************************************************************
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// 8-bit Horizontal Wrap (like mirror) ** UNTESTED **
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void Wrap8bS(unsigned char * tex, uint32_t mask, uint32_t max_width, uint32_t real_width, uint32_t height)
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{
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if (mask == 0) return;
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uint32_t mask_width = (1 << mask);
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uint32_t mask_mask = (mask_width - 1) >> 2;
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if (mask_width >= max_width) return;
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int count = (max_width - mask_width) >> 2;
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if (count <= 0) return;
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int line_full = real_width;
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int line = line_full - (count << 2);
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if (line < 0) return;
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unsigned char * start = tex + (mask_width);
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wrap8bS(tex, start, height, mask_mask, line, line_full, count);
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}
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//****************************************************************
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// 8-bit Horizontal Clamp
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void Clamp8bS(unsigned char * tex, uint32_t width, uint32_t clamp_to, uint32_t real_width, uint32_t real_height)
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{
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if (real_width <= width) return;
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unsigned char * dest = tex + (width);
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unsigned char * constant = dest - 1;
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int count = clamp_to - width;
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int line_full = real_width;
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int line = width;
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clamp8bS(dest, constant, real_height, line, line_full, count);
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}
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//****************************************************************
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// 8-bit Vertical Mirror
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void Mirror8bT(unsigned char * tex, uint32_t mask, uint32_t max_height, uint32_t real_width)
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{
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if (mask == 0) return;
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uint32_t mask_height = (1 << mask);
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uint32_t mask_mask = mask_height - 1;
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if (max_height <= mask_height) return;
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int line_full = real_width;
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unsigned char * dst = tex + mask_height * line_full;
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for (uint32_t y = mask_height; y < max_height; y++)
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{
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if (y & mask_height)
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{
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// mirrored
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memcpy((void*)dst, (void*)(tex + (mask_mask - (y & mask_mask)) * line_full), line_full);
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}
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else
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{
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// not mirrored
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memcpy((void*)dst, (void*)(tex + (y & mask_mask) * line_full), line_full);
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}
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dst += line_full;
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}
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}
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//****************************************************************
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// 8-bit Vertical Wrap
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void Wrap8bT(unsigned char * tex, uint32_t mask, uint32_t max_height, uint32_t real_width)
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{
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if (mask == 0) return;
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uint32_t mask_height = (1 << mask);
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uint32_t mask_mask = mask_height - 1;
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if (max_height <= mask_height) return;
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int line_full = real_width;
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unsigned char * dst = tex + mask_height * line_full;
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for (uint32_t y = mask_height; y < max_height; y++)
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{
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// not mirrored
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memcpy((void*)dst, (void*)(tex + (y & mask_mask) * line_full), line_full);
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dst += line_full;
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}
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}
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//****************************************************************
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// 8-bit Vertical Clamp
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void Clamp8bT(unsigned char * tex, uint32_t height, uint32_t real_width, uint32_t clamp_to)
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{
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int line_full = real_width;
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unsigned char * dst = tex + height * line_full;
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unsigned char * const_line = dst - line_full;
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for (uint32_t y = height; y < clamp_to; y++)
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{
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memcpy((void*)dst, (void*)const_line, line_full);
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dst += line_full;
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}
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}
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