mirror of
https://github.com/ZDoom/Raze.git
synced 2024-12-03 17:41:51 +00:00
145 lines
4.2 KiB
C++
145 lines
4.2 KiB
C++
#pragma once
|
|
|
|
/*
|
|
** imagehelpers.h
|
|
** Utilities for image conversion - mostly 8 bit paletted baggage
|
|
**
|
|
**---------------------------------------------------------------------------
|
|
** Copyright 2004-2007 Randy Heit
|
|
** Copyright 2006-2018 Christoph Oelckers
|
|
** All rights reserved.
|
|
**
|
|
** Redistribution and use in source and binary forms, with or without
|
|
** modification, are permitted provided that the following conditions
|
|
** are met:
|
|
**
|
|
** 1. Redistributions of source code must retain the above copyright
|
|
** notice, this list of conditions and the following disclaimer.
|
|
** 2. Redistributions in binary form must reproduce the above copyright
|
|
** notice, this list of conditions and the following disclaimer in the
|
|
** documentation and/or other materials provided with the distribution.
|
|
** 3. The name of the author may not be used to endorse or promote products
|
|
** derived from this software without specific prior written permission.
|
|
**
|
|
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
**---------------------------------------------------------------------------
|
|
**
|
|
**
|
|
*/
|
|
|
|
|
|
#include <stdint.h>
|
|
#include "tarray.h"
|
|
#include "palentry.h"
|
|
#include "textures/bitmap.h"
|
|
|
|
namespace ImageHelpers
|
|
{
|
|
union ColorTable256k
|
|
{
|
|
uint8_t RGB[64][64][64];
|
|
uint8_t All[64 * 64 * 64];
|
|
};
|
|
|
|
extern uint8_t GrayMap[256];
|
|
extern PalEntry BaseColors[256];
|
|
extern PalEntry BasePalette[256]; // same as above, but with a being a proper alpha channel.
|
|
extern int WhiteIndex, BlackIndex;
|
|
extern ColorTable256k RGB256k;
|
|
extern int alphaThreshold;
|
|
|
|
// Todo: This should not pick fullbright colors.
|
|
int BestColor(int r, int g, int b, int first = 0, int num = 255);
|
|
void SetPalette(const PalEntry* colors);
|
|
|
|
|
|
// Helpers for creating paletted images.
|
|
inline uint8_t *GetGraymap()
|
|
{
|
|
return GrayMap;
|
|
}
|
|
|
|
inline uint8_t RGBToPalettePrecise(bool wantluminance, int r, int g, int b, int a = 255)
|
|
{
|
|
return BestColor(r, g, b);
|
|
}
|
|
|
|
inline uint8_t RGBToPalette(bool wantluminance, int r, int g, int b, int a = 255)
|
|
{
|
|
return a < alphaThreshold? 255 : RGB256k.RGB[r >> 2][g >> 2][b >> 2];
|
|
}
|
|
|
|
inline uint8_t RGBToPalette(bool wantluminance, PalEntry pe, bool hasalpha = true)
|
|
{
|
|
return RGBToPalette(wantluminance, pe.r, pe.g, pe.b, hasalpha? pe.a : 255);
|
|
}
|
|
|
|
//==========================================================================
|
|
//
|
|
// Converts a texture between row-major and column-major format
|
|
// by flipping it about the X=Y axis.
|
|
//
|
|
//==========================================================================
|
|
|
|
template<class T>
|
|
void FlipSquareBlock (T *block, int x)
|
|
{
|
|
for (int i = 0; i < x; ++i)
|
|
{
|
|
T *corner = block + x*i + i;
|
|
int count = x - i;
|
|
for (int j = 0; j < count; j++)
|
|
{
|
|
std::swap(corner[j], corner[j*x]);
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void FlipSquareBlockRemap (uint8_t *block, int x, const uint8_t *remap)
|
|
{
|
|
for (int i = 0; i < x; ++i)
|
|
{
|
|
uint8_t *corner = block + x*i + i;
|
|
int count = x - i;
|
|
for (int j = 0; j < count; j++)
|
|
{
|
|
auto t = remap[corner[j]];
|
|
corner[j] = remap[corner[j*x]];
|
|
corner[j*x] = t;
|
|
}
|
|
}
|
|
}
|
|
|
|
template<class T>
|
|
void FlipNonSquareBlock (T *dst, const T *src, int x, int y, int srcpitch)
|
|
{
|
|
for (int i = 0; i < x; ++i)
|
|
{
|
|
for (int j = 0; j < y; ++j)
|
|
{
|
|
dst[i*y+j] = src[i+j*srcpitch];
|
|
}
|
|
}
|
|
}
|
|
|
|
inline void FlipNonSquareBlockRemap (uint8_t *dst, const uint8_t *src, int x, int y, int srcpitch, const uint8_t *remap)
|
|
{
|
|
for (int i = 0; i < x; ++i)
|
|
{
|
|
for (int j = 0; j < y; ++j)
|
|
{
|
|
dst[i*y+j] = remap[src[i+j*srcpitch]];
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|