raze-gles/source/glbackend/gl_palmanager.cpp

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/*
** gl_palmanager.cpp
** Palette management
**
**---------------------------------------------------------------------------
** Copyright 2019 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 <memory>
#include "m_crc32.h"
#include "glbackend.h"
#include "baselayer.h"
#include "resourcefile.h"
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#include "imagehelpers.h"
#include "v_font.h"
//===========================================================================
//
// The palette manager will contain all palettes being used for texture
// creation. It is also responsible for creating palette textures for indexed
// rendering.
//
//===========================================================================
PaletteManager::~PaletteManager()
{
DeleteAll();
}
//===========================================================================
//
//
//
//===========================================================================
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void PaletteManager::DeleteAllTextures()
{
for (auto& pal : palettes)
{
if (pal.paltexture) delete pal.paltexture;
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pal.paltexture = nullptr;
}
for (auto& pal : palswaps)
{
if (pal.swaptexture) delete pal.swaptexture;
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pal.swaptexture = nullptr;
}
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if (palswapTexture) delete palswapTexture;
palswapTexture = nullptr;
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}
void PaletteManager::DeleteAll()
{
DeleteAllTextures();
palettes.Reset();
palswaps.Reset();
lastindex = ~0u;
lastsindex = ~0u;
memset(palettemap, 0, sizeof(palettemap));
memset(palswapmap, 0, sizeof(palswapmap));
memset(addshade, 0, sizeof(addshade));
memset(mulshade, 0, sizeof(mulshade));
numshades = 1;
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}
//===========================================================================
//
// Adds a new palette while looking for duplicates.
//
//===========================================================================
unsigned PaletteManager::FindPalette(const uint8_t *paldata)
{
auto crc32 = CalcCRC32(paldata, 1024);
for (unsigned int i = 0; i< palettes.Size(); i++)
{
if (crc32 == palettes[i].crc32)
{
if (!memcmp(paldata, palettes[i].colors, 1024))
{
return i;
}
}
}
PaletteData pd;
memcpy(pd.colors, paldata, 1024);
pd.crc32 = crc32;
pd.paltexture = nullptr;
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pd.shadesdone = false;
return palettes.Push(pd);
}
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//===========================================================================
//
// Adds a new palette while looking for duplicates.
//
//===========================================================================
unsigned PaletteManager::FindPalswap(const uint8_t* paldata)
{
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if (paldata == nullptr) return 0;
auto crc32 = CalcCRC32(paldata, 256 * numshades);
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for (unsigned int i = 0; i < palswaps.Size(); i++)
{
if (crc32 == palswaps[i].crc32)
{
if (!memcmp(paldata, palswaps[i].lookup, 256 * numshades))
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{
return i;
}
}
}
PalswapData pd;
pd.lookup = paldata;
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pd.crc32 = crc32;
pd.swaptexture = nullptr;
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// Find what index maps to black (or the darkest available color)
int found = -1;
PalEntry foundColor = 0xffffffff;
for (int i = 0; i < 255; i++)
{
int map = paldata[i];
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PalEntry color = palettes[palettemap[0]].colors[map];
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if (color.Luminance() < foundColor.Luminance())
{
foundColor = color;
found = i;
}
}
// Determine the fade color. We pick what black, or the darkest color, maps to in the lowest shade level.
int map = paldata[(numshades - 2) * 256 + found]; // do not look in the latest shade level because it doesn't always contain useful data for this.
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pd.fadeColor = palettes[palettemap[0]].colors[map];
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if (pd.fadeColor.Luminance() < 10) pd.fadeColor = 0; // Account for the inability to check the last fade level by using a higher threshold for determining black fog.
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return palswaps.Push(pd);
}
//===========================================================================
//
//
//
//===========================================================================
void PaletteManager::SetPalette(int index, const uint8_t* data)
{
// New palettes may only be added if declared transient or on startup.
// Otherwise this would require a renderer reset to flush out the textures affected by the change.
if (index < 0 || index > 255) return; // invalid index - ignore.
palettemap[index] = FindPalette(data);
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if (index == 0)
{
ImageHelpers::SetPalette((PalEntry*)data); // Palette 0 is always the reference for downconverting images
}
}
//===========================================================================
//
//
//
//===========================================================================
void PaletteManager::BindPalette(int index)
{
if (palettemap[index] < palettes.Size())
{
auto uindex = palettemap[index];
if (uindex != lastindex)
{
lastindex = uindex;
if (palettes[uindex].paltexture == nullptr)
{
auto p = GLInterface.NewTexture();
p->CreateTexture(256, 1, FHardwareTexture::TrueColor, false);
p->LoadTexture((uint8_t*)palettes[uindex].colors);
p->SetSampler(SamplerNoFilterClampXY);
palettes[uindex].paltexture = p;
}
inst->BindTexture(2, palettes[uindex].paltexture);
}
}
}
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//===========================================================================
//
//
//
//===========================================================================
void PaletteManager::SetPalswapData(int index, const uint8_t* data, int numshades_)
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{
if (index < 0 || index > 255) return; // invalid index - ignore.
numshades = numshades_;
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palswapmap[index] = FindPalswap(data);
}
//===========================================================================
//
//
//
//===========================================================================
void PaletteManager::BindPalswap(int index)
{
if (palswapmap[index] < palswaps.Size())
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{
auto uindex = palswapmap[index];
if (uindex != lastsindex)
{
lastsindex = uindex;
auto& ps = palswaps[uindex];
if (ps.swaptexture == nullptr)
{
auto p = GLInterface.NewTexture();
p->CreateTexture(256, numshades, FHardwareTexture::Indexed, false);
p->LoadTexture((uint8_t*)ps.lookup);
p->SetSampler(SamplerNoFilterClampXY);
ps.swaptexture = p;
}
inst->BindTexture(1, ps.swaptexture);
inst->SetFadeColor(ps.fadeColor);
}
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}
}
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int PaletteManager::LookupPalette(int palette, int palswap, bool brightmap)
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{
int realpal = palettemap[palette];
int realswap = palswapmap[palswap];
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int combined = (brightmap? 0x1000000 : 0) + realpal * 0x10000 + realswap;
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int* combinedindex = swappedpalmap.CheckKey(combined);
if (combinedindex) return *combinedindex;
PaletteData* paldata = &palettes[realpal];
PalswapData* swapdata = &palswaps[realswap];
PalEntry swappedpalette[256];
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if (!brightmap)
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{
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for (int i = 0; i < 255; i++)
{
int swapi = swapdata->lookup[i];
swappedpalette[i] = paldata->colors[swapi];
swappedpalette[i].a = 255;
}
}
else
{
bool found = false;
memset(swappedpalette, 0, sizeof(swappedpalette));
for (int i = 0; i < 255; i++)
{
int swapi = swapdata->lookup[i];
auto swapc = paldata->colors[swapi];
if (swapc.a)
{
found = true;
swappedpalette[i] = 0xffffffff;
}
}
if (!found)
{
swappedpalmap.Insert(combined, -1);
return -1;
}
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}
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swappedpalette[255] = 0;
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int palid = FindPalette((uint8_t*)swappedpalette);
swappedpalmap.Insert(combined, palid);
return palid;
}