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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include <sstream>
#include <cstring>
#include "ColorMap.h"
#include "Bitmap.h"
#include "Bitmap.h"
#include "System/FileSystem/FileHandler.h"
#include "System/Util.h"
#include "System/Exceptions.h"
std::vector<CColorMap*> CColorMap::colorMaps;
std::map<std::string, CColorMap*> CColorMap::colorMapsMap;
CR_BIND(CColorMap,)
CR_REG_METADATA(CColorMap, (
CR_MEMBER_UN(map),
CR_MEMBER_UN(xsize),
CR_MEMBER_UN(nxsize),
CR_MEMBER_UN(ysize),
CR_MEMBER_UN(nysize)
))
CColorMap::CColorMap()
: xsize(0)
, nxsize(0)
, ysize(0)
, nysize(0)
{
}
CColorMap::CColorMap(const std::vector<float>& vec)
{
if (vec.size() < 8) {
throw content_error("[ColorMap] too few colors in colormap (need at least two RGBA values)");
}
unsigned char* lmap = new unsigned char[vec.size() - (vec.size() % 4)];
xsize = (vec.size() - (vec.size() % 4)) / 4;
ysize = 1;
nxsize = xsize - 1;
nysize = ysize - 1;
for (int i = 0; i < (xsize * 4); ++i) {
lmap[i] = (int) (vec[i] * 255);
}
LoadMap(lmap, xsize * 4);
delete[] lmap;
}
CColorMap::CColorMap(const std::string& fileName)
{
CBitmap bitmap;
if (!bitmap.Load(fileName)) {
throw content_error("Could not load texture from file " + fileName);
}
if (bitmap.compressed || (bitmap.channels != 4) || (bitmap.xsize < 2)) {
throw content_error("Unsupported bitmap format in file " + fileName);
}
xsize = bitmap.xsize;
ysize = bitmap.ysize;
nxsize = xsize - 1;
nysize = ysize - 1;
LoadMap(bitmap.mem, xsize * ysize * 4);
}
CColorMap::CColorMap(const unsigned char* buf, int num)
{
xsize = num / 4;
ysize = 1;
LoadMap(buf, num);
nxsize = xsize - 1;
nysize = ysize - 1;
}
CColorMap::~CColorMap()
{
}
void CColorMap::DeleteColormaps()
{
for (size_t i = 0; i < colorMaps.size(); ++i) {
delete colorMaps[i];
}
colorMaps.clear();
}
void CColorMap::LoadMap(const unsigned char* buf, int num)
{
map.resize(num);
std::memcpy(&map[0], buf, num);
}
CColorMap* CColorMap::LoadFromBitmapFile(const std::string& fileName)
{
const std::string& lowFilename = StringToLower(fileName);
CColorMap* map = colorMapsMap.find(lowFilename)->second;
if (colorMapsMap.find(lowFilename) != colorMapsMap.end())
return map;
map = new CColorMap(fileName);
colorMapsMap[lowFilename] = map;
colorMaps.push_back(map);
return map;
}
CColorMap* CColorMap::LoadFromFloatVector(const std::vector<float>& vec)
{
CColorMap* map = new CColorMap(vec);
colorMaps.push_back(map);
return map;
}
CColorMap* CColorMap::LoadFromFloatString(const std::string& fString)
{
std::stringstream stream;
stream << fString;
std::vector<float> vec;
float value;
while (stream >> value) {
vec.push_back(value);
}
CColorMap* map = CColorMap::LoadFromFloatVector(vec);
return map;
}
CColorMap* CColorMap::LoadFromDefString(const std::string& dString)
{
std::stringstream stream;
std::vector<float> vec;
stream << dString;
float value;
while (stream >> value) {
vec.push_back(value);
}
CColorMap* map = NULL;
if (vec.empty()) {
map = CColorMap::LoadFromBitmapFile("bitmaps\\" + dString);
} else {
map = CColorMap::LoadFromFloatVector(vec);
}
if (map == NULL) {
throw content_error("[ColorMap::LoadFromDefString] unable to load color-map " + dString);
}
return map;
}
CColorMap* CColorMap::Load12f(float r1, float g1, float b1, float a1, float r2, float g2, float b2, float a2, float r3, float g3, float b3, float a3)
{
std::vector<float> vec;
vec.push_back(r1);
vec.push_back(g1);
vec.push_back(b1);
vec.push_back(a1);
vec.push_back(r2);
vec.push_back(g2);
vec.push_back(b2);
vec.push_back(a2);
vec.push_back(r3);
vec.push_back(g3);
vec.push_back(b3);
vec.push_back(a3);
return CColorMap::LoadFromFloatVector(vec);
}
unsigned char* CColorMap::GetColor(unsigned char* color, float pos)
{
if (pos >= 1.0f) {
*((int*)color) = ((int*)&map[0])[nxsize];
return color;
}
const float fposn = pos * nxsize;
const int iposn = (int) fposn;
const float fracn = fposn - iposn;
const int aa = (int) (fracn * 256);
const int ia = 256 - aa;
unsigned char* col1 = (unsigned char*) &map[(iposn ) * 4];
unsigned char* col2 = (unsigned char*) &map[(iposn + 1) * 4];
color[0] = ((col1[0] * ia) + (col2[0] * aa)) >> 8;
color[1] = ((col1[1] * ia) + (col2[1] * aa)) >> 8;
color[2] = ((col1[2] * ia) + (col2[2] * aa)) >> 8;
color[3] = ((col1[3] * ia) + (col2[3] * aa)) >> 8;
return color;
}
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