mirror of
https://github.com/ZDoom/gzdoom.git
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688 lines
16 KiB
C++
688 lines
16 KiB
C++
/*
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** v_pfx.cpp
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** Pixel format conversion routines
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**
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**---------------------------------------------------------------------------
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** Copyright 1998-2006 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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*/
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#include "doomtype.h"
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#include "i_system.h"
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#include "v_palette.h"
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#include "v_pfx.h"
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PfxUnion GPfxPal;
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PfxState GPfx;
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static bool AnalyzeMask (uint32_t mask, uint8_t *shift);
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static void Palette16Generic (const PalEntry *pal);
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static void Palette16R5G5B5 (const PalEntry *pal);
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static void Palette16R5G6B5 (const PalEntry *pal);
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static void Palette32Generic (const PalEntry *pal);
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static void Palette32RGB (const PalEntry *pal);
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static void Palette32BGR (const PalEntry *pal);
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static void Scale8 (uint8_t *src, int srcpitch,
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void *destin, int destpitch, int destwidth, int destheight,
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fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac);
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static void Convert8 (uint8_t *src, int srcpitch,
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void *destin, int destpitch, int destwidth, int destheight,
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fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac);
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static void Convert16 (uint8_t *src, int srcpitch,
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void *destin, int destpitch, int destwidth, int destheight,
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fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac);
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static void Convert24 (uint8_t *src, int srcpitch,
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void *destin, int destpitch, int destwidth, int destheight,
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fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac);
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static void Convert32 (uint8_t *src, int srcpitch,
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void *destin, int destpitch, int destwidth, int destheight,
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fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac);
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void PfxState::SetFormat (int bits, uint32_t redMask, uint32_t greenMask, uint32_t blueMask)
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{
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switch (bits)
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{
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case -8:
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Convert = Scale8;
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SetPalette = NULL;
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break;
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case 8:
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Convert = Convert8;
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SetPalette = NULL;
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break;
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case 16:
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if (redMask == 0x7c00 && greenMask == 0x03e0 && blueMask == 0x001f)
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{
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SetPalette = Palette16R5G5B5;
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}
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else if (redMask == 0xf800 && greenMask == 0x07e0 && blueMask == 0x001f)
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{
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SetPalette = Palette16R5G6B5;
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}
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else
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{
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SetPalette = Palette16Generic;
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}
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Convert = Convert16;
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Masks.Bits16.Red = (uint16_t)redMask;
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Masks.Bits16.Green = (uint16_t)greenMask;
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Masks.Bits16.Blue = (uint16_t)blueMask;
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break;
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case 24:
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if (redMask == 0xff0000 && greenMask == 0x00ff00 && blueMask == 0x0000ff)
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{
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SetPalette = Palette32RGB;
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Convert = Convert24;
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}
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else if (redMask == 0x0000ff && greenMask == 0x00ff00 && blueMask == 0xff0000)
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{
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SetPalette = Palette32BGR;
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Convert = Convert24;
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}
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else
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{
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I_FatalError ("24-bit displays are only supported if they are RGB or BGR");
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};
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break;
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case 32:
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if (redMask == 0xff0000 && greenMask == 0x00ff00 && blueMask == 0x0000ff)
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{
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SetPalette = Palette32RGB;
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}
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else if (redMask == 0x0000ff && greenMask == 0x00ff00 && blueMask == 0xff0000)
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{
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SetPalette = Palette32BGR;
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}
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else
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{
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SetPalette = Palette32Generic;
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}
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Convert = Convert32;
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Masks.Bits32.Red = redMask;
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Masks.Bits32.Green = greenMask;
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Masks.Bits32.Blue = blueMask;
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break;
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default:
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I_FatalError ("Can't draw to %d-bit displays", bits);
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}
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if (bits != 8 && bits != -8)
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{
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RedLeft = AnalyzeMask (redMask, &RedShift);
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GreenLeft = AnalyzeMask (greenMask, &GreenShift);
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BlueLeft = AnalyzeMask (blueMask, &BlueShift);
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}
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}
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static bool AnalyzeMask (uint32_t mask, uint8_t *shiftout)
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{
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uint8_t shift = 0;
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if (mask >= 0xff)
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{
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while (mask > 0xff)
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{
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shift++;
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mask >>= 1;
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}
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*shiftout = shift;
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return true;
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}
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else
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{
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while (mask < 0xff)
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{
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shift++;
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mask <<= 1;
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}
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*shiftout = shift;
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return false;
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}
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}
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// Palette converters ------------------------------------------------------
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static void Palette16Generic (const PalEntry *pal)
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{
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uint16_t *p16;
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int i;
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for (p16 = GPfxPal.Pal16, i = 256; i != 0; i--, pal++, p16++)
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{
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uint16_t rpart, gpart, bpart;
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if (GPfx.RedLeft) rpart = pal->r << GPfx.RedShift;
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else rpart = pal->r >> GPfx.RedShift;
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if (GPfx.GreenLeft) gpart = pal->g << GPfx.GreenShift;
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else gpart = pal->g >> GPfx.GreenShift;
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if (GPfx.BlueLeft) bpart = pal->b << GPfx.BlueShift;
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else bpart = pal->b >> GPfx.BlueShift;
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*p16 = (rpart & GPfx.Masks.Bits16.Red) |
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(gpart & GPfx.Masks.Bits16.Green) |
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(bpart & GPfx.Masks.Bits16.Blue);
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}
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}
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static void Palette16R5G5B5 (const PalEntry *pal)
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{
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uint16_t *p16;
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int i;
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for (p16 = GPfxPal.Pal16, i = 256; i != 0; i--, pal++, p16++)
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{
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*p16 = ((pal->r << 7) & 0x7c00) |
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((pal->g << 2) & 0x03e0) |
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((pal->b >> 3) & 0x001f);
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}
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}
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static void Palette16R5G6B5 (const PalEntry *pal)
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{
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uint16_t *p16;
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int i;
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for (p16 = GPfxPal.Pal16, i = 256; i != 0; i--, pal++, p16++)
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{
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*p16 = ((pal->r << 8) & 0xf800) |
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((pal->g << 3) & 0x07e0) |
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((pal->b >> 3) & 0x001f);
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}
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}
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static void Palette32Generic (const PalEntry *pal)
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{
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uint32_t *p32;
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int i;
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for (p32 = GPfxPal.Pal32, i = 256; i != 0; i--, pal++, p32++)
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{
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uint32_t rpart, gpart, bpart;
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if (GPfx.RedLeft) rpart = pal->r << GPfx.RedShift;
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else rpart = pal->r >> GPfx.RedShift;
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if (GPfx.GreenLeft) gpart = pal->g << GPfx.GreenShift;
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else gpart = pal->g >> GPfx.GreenShift;
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if (GPfx.BlueLeft) bpart = pal->b << GPfx.BlueShift;
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else bpart = pal->b >> GPfx.BlueShift;
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*p32 = (rpart & GPfx.Masks.Bits32.Red) |
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(gpart & GPfx.Masks.Bits32.Green) |
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(bpart & GPfx.Masks.Bits32.Blue);
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}
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}
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static void Palette32RGB (const PalEntry *pal)
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{
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memcpy (GPfxPal.Pal32, pal, 256*4);
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}
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static void Palette32BGR (const PalEntry *pal)
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{
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uint32_t *p32;
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int i;
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for (p32 = GPfxPal.Pal32, i = 256; i != 0; i--, pal++, p32++)
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{
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*p32 = (pal->r) | (pal->g << 8) | (pal->b << 16);
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}
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}
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// Bitmap converters -------------------------------------------------------
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static void Scale8 (uint8_t *src, int srcpitch,
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void *destin, int destpitch, int destwidth, int destheight,
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fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac)
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{
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if ((destwidth | destheight) == 0)
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{
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return;
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}
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int x, y, savedx;
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uint8_t *dest = (uint8_t *)destin;
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if (xstep == FRACUNIT && ystep == FRACUNIT)
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{
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for (y = destheight; y != 0; y--)
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{
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memcpy(dest, src, destwidth);
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dest += destpitch;
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src += srcpitch;
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}
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}
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else if (xstep == FRACUNIT/2 && ystep == FRACUNIT/2)
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{
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uint8_t *dest2 = dest + destpitch;
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destpitch = destpitch * 2 - destwidth;
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srcpitch -= destwidth / 2;
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for (y = destheight / 2; y != 0; --y)
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{
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for (x = destwidth / 2; x != 0; --x)
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{
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uint8_t foo = src[0];
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dest[0] = foo;
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dest[1] = foo;
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dest2[0] = foo;
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dest2[1] = foo;
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dest += 2;
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dest2 += 2;
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src += 1;
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}
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dest += destpitch;
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dest2 += destpitch;
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src += srcpitch;
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}
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}
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else if (xstep == FRACUNIT/4 && ystep == FRACUNIT/4)
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{
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int gap = destpitch * 4 - destwidth;
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srcpitch -= destwidth / 4;
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for (y = destheight / 4; y != 0; --y)
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{
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for (uint8_t *end = dest + destpitch; dest != end; dest += 4)
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{
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uint8_t foo = src[0];
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dest[0] = foo;
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dest[1] = foo;
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dest[2] = foo;
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dest[3] = foo;
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dest[0 + destpitch] = foo;
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dest[1 + destpitch] = foo;
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dest[2 + destpitch] = foo;
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dest[3 + destpitch] = foo;
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dest[0 + destpitch*2] = foo;
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dest[1 + destpitch*2] = foo;
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dest[2 + destpitch*2] = foo;
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dest[3 + destpitch*2] = foo;
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dest[0 + destpitch*3] = foo;
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dest[1 + destpitch*3] = foo;
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dest[2 + destpitch*3] = foo;
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dest[3 + destpitch*3] = foo;
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src += 1;
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}
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dest += gap;
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src += srcpitch;
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}
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}
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else
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{
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destpitch -= destwidth;
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for (y = destheight; y != 0; y--)
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{
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fixed_t xf = xfrac;
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x = destwidth;
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while (((size_t)dest & 3) && x != 0)
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{
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*dest++ = src[xf >> FRACBITS];
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xf += xstep;
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x--;
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}
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for (savedx = x, x >>= 2; x != 0; x--)
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{
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uint32_t work;
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#ifdef __BIG_ENDIAN__
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work = src[xf >> FRACBITS] << 24; xf += xstep;
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work |= src[xf >> FRACBITS] << 16; xf += xstep;
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work |= src[xf >> FRACBITS] << 8; xf += xstep;
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work |= src[xf >> FRACBITS]; xf += xstep;
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#else
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work = src[xf >> FRACBITS]; xf += xstep;
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work |= src[xf >> FRACBITS] << 8; xf += xstep;
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work |= src[xf >> FRACBITS] << 16; xf += xstep;
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work |= src[xf >> FRACBITS] << 24; xf += xstep;
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#endif
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*(uint32_t *)dest = work;
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dest += 4;
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}
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for (savedx &= 3; savedx != 0; savedx--, xf += xstep)
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{
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*dest++ = src[xf >> FRACBITS];
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}
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yfrac += ystep;
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while (yfrac >= FRACUNIT)
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{
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yfrac -= FRACUNIT;
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src += srcpitch;
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}
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dest += destpitch;
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}
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}
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}
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static void Convert8 (uint8_t *src, int srcpitch,
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void *destin, int destpitch, int destwidth, int destheight,
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fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac)
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{
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if ((destwidth | destheight) == 0)
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{
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return;
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}
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int x, y, savedx;
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uint8_t *dest = (uint8_t *)destin;
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destpitch -= destwidth;
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if (xstep == FRACUNIT && ystep == FRACUNIT)
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{
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srcpitch -= destwidth;
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for (y = destheight; y != 0; y--)
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{
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x = destwidth;
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while (((size_t)dest & 3) && x != 0)
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{
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*dest++ = GPfxPal.Pal8[*src++];
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x--;
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}
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for (savedx = x, x >>= 2; x != 0; x--)
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{
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*(uint32_t *)dest =
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#ifdef __BIG_ENDIAN__
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(GPfxPal.Pal8[src[0]] << 24) |
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(GPfxPal.Pal8[src[1]] << 16) |
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(GPfxPal.Pal8[src[2]] << 8) |
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(GPfxPal.Pal8[src[3]]);
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#else
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(GPfxPal.Pal8[src[0]]) |
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(GPfxPal.Pal8[src[1]] << 8) |
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(GPfxPal.Pal8[src[2]] << 16) |
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(GPfxPal.Pal8[src[3]] << 24);
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#endif
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dest += 4;
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src += 4;
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}
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for (savedx &= 3; savedx != 0; savedx--)
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{
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*dest++ = GPfxPal.Pal8[*src++];
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}
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dest += destpitch;
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src += srcpitch;
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}
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}
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else
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{
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for (y = destheight; y != 0; y--)
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{
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fixed_t xf = xfrac;
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x = destwidth;
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while (((size_t)dest & 3) && x != 0)
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{
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*dest++ = GPfxPal.Pal8[src[xf >> FRACBITS]];
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xf += xstep;
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x--;
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}
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for (savedx = x, x >>= 2; x != 0; x--)
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{
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uint32_t work;
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#ifdef __BIG_ENDIAN__
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work = GPfxPal.Pal8[src[xf >> FRACBITS]] << 24; xf += xstep;
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work |= GPfxPal.Pal8[src[xf >> FRACBITS]] << 16; xf += xstep;
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work |= GPfxPal.Pal8[src[xf >> FRACBITS]] << 8; xf += xstep;
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work |= GPfxPal.Pal8[src[xf >> FRACBITS]]; xf += xstep;
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#else
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work = GPfxPal.Pal8[src[xf >> FRACBITS]]; xf += xstep;
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work |= GPfxPal.Pal8[src[xf >> FRACBITS]] << 8; xf += xstep;
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work |= GPfxPal.Pal8[src[xf >> FRACBITS]] << 16; xf += xstep;
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work |= GPfxPal.Pal8[src[xf >> FRACBITS]] << 24; xf += xstep;
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#endif
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*(uint32_t *)dest = work;
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dest += 4;
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}
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for (savedx &= 3; savedx != 0; savedx--, xf += xstep)
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{
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*dest++ = GPfxPal.Pal8[src[xf >> FRACBITS]];
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}
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yfrac += ystep;
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while (yfrac >= FRACUNIT)
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{
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yfrac -= FRACUNIT;
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src += srcpitch;
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}
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dest += destpitch;
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}
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}
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}
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static void Convert16 (uint8_t *src, int srcpitch,
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void *destin, int destpitch, int destwidth, int destheight,
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fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac)
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{
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if ((destwidth | destheight) == 0)
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{
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return;
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}
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int x, y, savedx;
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uint16_t *dest = (uint16_t *)destin;
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destpitch = (destpitch >> 1) - destwidth;
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if (xstep == FRACUNIT && ystep == FRACUNIT)
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{
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srcpitch -= destwidth;
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for (y = destheight; y != 0; y--)
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{
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x = destwidth;
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if ((size_t)dest & 1)
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{
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x--;
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*dest++ = GPfxPal.Pal16[*src++];
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}
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for (savedx = x, x >>= 1; x != 0; x--)
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{
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*(uint32_t *)dest =
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#ifdef __BIG_ENDIAN__
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(GPfxPal.Pal16[src[0]] << 16) |
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(GPfxPal.Pal16[src[1]]);
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#else
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(GPfxPal.Pal16[src[0]]) |
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(GPfxPal.Pal16[src[1]] << 16);
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#endif
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dest += 2;
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src += 2;
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}
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if (savedx & 1)
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{
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*dest++ = GPfxPal.Pal16[*src++];
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}
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dest += destpitch;
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src += srcpitch;
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}
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}
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else
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{
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for (y = destheight; y != 0; y--)
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{
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fixed_t xf = xfrac;
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x = destwidth;
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if ((size_t)dest & 1)
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{
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*dest++ = GPfxPal.Pal16[src[xf >> FRACBITS]];
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xf += xstep;
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x--;
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}
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for (savedx = x, x >>= 1; x != 0; x--)
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{
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uint32_t work;
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#ifdef __BIG_ENDIAN__
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work = GPfxPal.Pal16[src[xf >> FRACBITS]] << 16; xf += xstep;
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work |= GPfxPal.Pal16[src[xf >> FRACBITS]]; xf += xstep;
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#else
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work = GPfxPal.Pal16[src[xf >> FRACBITS]]; xf += xstep;
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work |= GPfxPal.Pal16[src[xf >> FRACBITS]] << 16; xf += xstep;
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#endif
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*(uint32_t *)dest = work;
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dest += 2;
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}
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if (savedx & 1)
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{
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*dest++ = GPfxPal.Pal16[src[xf >> FRACBITS]];
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}
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yfrac += ystep;
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while (yfrac >= FRACUNIT)
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{
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yfrac -= FRACUNIT;
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src += srcpitch;
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}
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dest += destpitch;
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}
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}
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}
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static void Convert24 (uint8_t *src, int srcpitch,
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void *destin, int destpitch, int destwidth, int destheight,
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fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac)
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{
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if ((destwidth | destheight) == 0)
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{
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return;
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}
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int x, y;
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uint8_t *dest = (uint8_t *)destin;
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destpitch = destpitch - destwidth*3;
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if (xstep == FRACUNIT && ystep == FRACUNIT)
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{
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srcpitch -= destwidth;
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for (y = destheight; y != 0; y--)
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{
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for (x = destwidth; x != 0; x--)
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{
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uint8_t *pe = GPfxPal.Pal24[src[0]];
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dest[0] = pe[0];
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dest[1] = pe[1];
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dest[2] = pe[2];
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dest += 3;
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src++;
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}
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dest += destpitch;
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src += srcpitch;
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}
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}
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else
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{
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for (y = destheight; y != 0; y--)
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{
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fixed_t xf = xfrac;
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for (x = destwidth; x != 0; x--)
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{
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uint8_t *pe = GPfxPal.Pal24[src[xf >> FRACBITS]];
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dest[0] = pe[0];
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dest[1] = pe[1];
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dest[2] = pe[2];
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xf += xstep;
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dest += 2;
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}
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yfrac += ystep;
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while (yfrac >= FRACUNIT)
|
|
{
|
|
yfrac -= FRACUNIT;
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|
src += srcpitch;
|
|
}
|
|
dest += destpitch;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void Convert32 (uint8_t *src, int srcpitch,
|
|
void *destin, int destpitch, int destwidth, int destheight,
|
|
fixed_t xstep, fixed_t ystep, fixed_t xfrac, fixed_t yfrac)
|
|
{
|
|
if ((destwidth | destheight) == 0)
|
|
{
|
|
return;
|
|
}
|
|
|
|
int x, y, savedx;
|
|
uint32_t *dest = (uint32_t *)destin;
|
|
|
|
destpitch = (destpitch >> 2) - destwidth;
|
|
if (xstep == FRACUNIT && ystep == FRACUNIT)
|
|
{
|
|
srcpitch -= destwidth;
|
|
for (y = destheight; y != 0; y--)
|
|
{
|
|
for (savedx = x = destwidth, x >>= 3; x != 0; x--)
|
|
{
|
|
dest[0] = GPfxPal.Pal32[src[0]];
|
|
dest[1] = GPfxPal.Pal32[src[1]];
|
|
dest[2] = GPfxPal.Pal32[src[2]];
|
|
dest[3] = GPfxPal.Pal32[src[3]];
|
|
dest[4] = GPfxPal.Pal32[src[4]];
|
|
dest[5] = GPfxPal.Pal32[src[5]];
|
|
dest[6] = GPfxPal.Pal32[src[6]];
|
|
dest[7] = GPfxPal.Pal32[src[7]];
|
|
dest += 8;
|
|
src += 8;
|
|
}
|
|
for (x = savedx & 7; x != 0; x--)
|
|
{
|
|
*dest++ = GPfxPal.Pal32[*src++];
|
|
}
|
|
dest += destpitch;
|
|
src += srcpitch;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (y = destheight; y != 0; y--)
|
|
{
|
|
fixed_t xf = xfrac;
|
|
for (savedx = x = destwidth, x >>= 1; x != 0; x--)
|
|
{
|
|
dest[0] = GPfxPal.Pal32[src[xf >> FRACBITS]]; xf += xstep;
|
|
dest[1] = GPfxPal.Pal32[src[xf >> FRACBITS]]; xf += xstep;
|
|
dest += 2;
|
|
}
|
|
if (savedx & 1)
|
|
{
|
|
*dest++ = GPfxPal.Pal32[src[xf >> FRACBITS]];
|
|
}
|
|
yfrac += ystep;
|
|
while (yfrac >= FRACUNIT)
|
|
{
|
|
yfrac -= FRACUNIT;
|
|
src += srcpitch;
|
|
}
|
|
dest += destpitch;
|
|
}
|
|
}
|
|
}
|