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/* Starshatter: The Open Source Project
Copyright (c) 2021-2024, Starshatter: The Open Source Project Contributors
Copyright (c) 2011-2012, Starshatter OpenSource Distribution Contributors
Copyright (c) 1997-2006, Destroyer Studios LLC.
AUTHOR: John DiCamillo
*/
#include <windows.h>
#include <cstring>
#include <fstream>
#include <ios>
#include <iostream>
#include <limits>
#include <vector>
#include <MagicLoad.h>
#include <Bitmap.h>
#include <Color.h>
#include <D3DXImage.h>
#include <Geometry.h>
#include <Pcx.h>
int
LoadBuffer(const char* filename, BYTE*& buf, bool null_terminate)
{
buf = nullptr;
std::fstream file {filename, file.binary | file.in};
if (!file.is_open())
return 0;
file.ignore(std::numeric_limits<std::streamsize>::max());
const auto size = file.gcount();
file.clear();
file.seekg(0);
if (null_terminate) {
buf = new BYTE[size + 1];
if (buf)
buf[size] = 0;
}
else {
buf = new BYTE[size];
}
if (buf) {
file.read(reinterpret_cast<char*>(buf), size);
return file.gcount();
}
return 0;
}
int
LoadTexture(const char* fname, Bitmap*& bitmap, int type)
{
if (fname == nullptr || fname[0] == 0)
return 0;
bitmap = Bitmap::CheckCache(fname);
if (bitmap)
return 0; // legacy behaviour
const bool is_pcx = std::strstr(fname, ".pcx") || std::strstr(fname, ".PCX");
if (is_pcx) {
PcxImage pcx;
if (pcx.Load((char*) fname) != PCX_OK) // Casting away const!
return 0;
bitmap = new Bitmap;
if (bitmap == nullptr)
return 0;
if (pcx.himap) {
bitmap->CopyHighColorImage(pcx.width, pcx.height, pcx.himap);
}
else if (pcx.bitmap) {
bitmap->CopyImage(pcx.width, pcx.height, pcx.bitmap);
std::vector<char> buf(std::strlen(fname) + 2);
std::strcpy(buf.data(), fname);
if (auto* ext = std::strstr(buf.data(), ".pcx"))
*ext = 0;
std::strcat(buf.data(), "+.pcx");
if (pcx.Load(buf.data()) == PCX_OK && pcx.himap != 0)
bitmap->CopyHighColorImage(pcx.width, pcx.height, pcx.himap);
}
else {
// legacy no-op
}
}
else {
D3DXImage d3dx;
bitmap = new Bitmap;
if (d3dx.Load((char*) fname)) {
std::cout << "d3dx done" << std::endl;
bitmap = new Bitmap;
bitmap->CopyHighColorImage(d3dx.width, d3dx.height, d3dx.image);
}
}
if (bitmap) {
LoadAlpha(fname, *bitmap, type);
bitmap->SetFilename(fname);
bitmap->SetType(type);
bitmap->MakeTexture();
Bitmap::AddToCache(bitmap);
}
return 0;
}
int
LoadAlpha(const char* name, Bitmap& bitmap, int type)
{
PcxImage pcx;
D3DXImage d3dx;
bool pcx_file = strstr(name, ".pcx") || strstr(name, ".PCX");
bool bmp_file = strstr(name, ".bmp") || strstr(name, ".BMP");
bool jpg_file = strstr(name, ".jpg") || strstr(name, ".JPG");
bool png_file = strstr(name, ".png") || strstr(name, ".PNG");
bool tga_file = strstr(name, ".tga") || strstr(name, ".TGA");
// check for an associated alpha-only (grayscale) bitmap:
char filename[256];
strcpy_s(filename, name);
char* dot = strrchr(filename, '.');
if (dot && pcx_file)
strcpy(dot, "@.pcx");
else if (dot && bmp_file)
strcpy(dot, "@.bmp");
else if (dot && jpg_file)
strcpy(dot, "@.jpg");
else if (dot && png_file)
strcpy(dot, "@.png");
else if (dot && tga_file)
strcpy(dot, "@.tga");
else
return 0;
// first try to load from current directory:
bool loaded = false;
if (pcx_file)
loaded = pcx.Load(filename) == PCX_OK;
else
loaded = d3dx.Load(filename);
// now copy the alpha values into the bitmap:
if (loaded) {
if (pcx_file && pcx.bitmap) {
bitmap.CopyAlphaImage(pcx.width, pcx.height, pcx.bitmap);
}
else if (pcx_file && pcx.himap) {
bitmap.CopyAlphaRedChannel(pcx.width, pcx.height, pcx.himap);
}
else if (d3dx.image) {
bitmap.CopyAlphaRedChannel(d3dx.width, d3dx.height, d3dx.image);
}
}
return 0;
}
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