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Code Issues 121 Wiki Activity

compatibility with winXP. .bmp loader now handles 32-bit images and more modern headers.

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This commit is contained in:
tmj-fstate
2017-01-30 23:21:00 +01:00
parent 3c0edb3ec3
commit 61440c4969
7 changed files with 51 additions and 35 deletions
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49
Texture.cpp
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@@ -54,14 +54,14 @@ TTexturesManager::Names::iterator TTexturesManager::LoadFromFile(std::string fil
AlphaValue texinfo;
if (ext == "tga")
if( ext == "dds" )
texinfo = LoadDDS( realFileName, filter );
else if( ext == "tga" )
texinfo = LoadTGA(realFileName, filter);
else if (ext == "tex")
texinfo = LoadTEX(realFileName);
else if (ext == "bmp")
texinfo = LoadBMP(realFileName);
else if (ext == "dds")
texinfo = LoadDDS(realFileName, filter);
_alphas.insert(
texinfo); // zapamiętanie stanu przezroczystości tekstury - można by tylko przezroczyste
@@ -242,11 +242,11 @@ bool TTexturesManager::GetAlpha(GLuint id)
return (iter != _alphas.end() ? iter->second : false);
}
TTexturesManager::AlphaValue TTexturesManager::LoadBMP(std::string fileName)
TTexturesManager::AlphaValue TTexturesManager::LoadBMP(std::string const &fileName)
{
AlphaValue fail(0, false);
std::ifstream file(fileName.c_str(), std::ios::binary);
std::ifstream file(fileName, std::ios::binary);
if (!file.is_open())
{
@@ -259,42 +259,44 @@ TTexturesManager::AlphaValue TTexturesManager::LoadBMP(std::string fileName)
file.read((char *)&header, sizeof(BITMAPFILEHEADER));
if (file.eof())
{
file.close();
return fail;
}
// Read in bitmap information structure
BITMAPINFO info;
long infoSize = header.bfOffBits - sizeof(BITMAPFILEHEADER);
file.read((char *)&info, infoSize);
unsigned int infoSize = header.bfOffBits - sizeof(BITMAPFILEHEADER);
if( infoSize > sizeof( info ) ) {
WriteLog( "Warning - BMP header is larger than expected, possible format difference." );
}
file.read((char *)&info, std::min(infoSize, sizeof(info)));
if (file.eof())
{
file.close();
return fail;
};
GLuint width = info.bmiHeader.biWidth;
GLuint height = info.bmiHeader.biHeight;
bool hasalpha = ( info.bmiHeader.biBitCount == 32 );
if( info.bmiHeader.biCompression != BI_RGB ) {
ErrorLog( "Compressed BMP textures aren't supported." );
return fail;
}
unsigned long bitSize = info.bmiHeader.biSizeImage;
if (!bitSize)
bitSize = (width * info.bmiHeader.biBitCount + 7) / 8 * height;
GLubyte *data = new GLubyte[bitSize];
file.read((char *)data, bitSize);
std::shared_ptr<GLubyte> data( new GLubyte[ bitSize ], std::default_delete<GLubyte[]>() );
file.read((char *)data.get(), bitSize);
if (file.eof())
{
delete[] data;
file.close();
return fail;
};
file.close();
GLuint id;
glGenTextures(1, &id);
glBindTexture(GL_TEXTURE_2D, id);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
@@ -308,10 +310,19 @@ TTexturesManager::AlphaValue TTexturesManager::LoadBMP(std::string fileName)
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
glTexImage2D(GL_TEXTURE_2D, 0, 3, width, height, 0, GL_BGR_EXT, GL_UNSIGNED_BYTE, data);
// glTexImage2D(GL_TEXTURE_2D, 0, 3, width, height, 0, GL_BGR_EXT, GL_UNSIGNED_BYTE, data.get());
glTexImage2D(
GL_TEXTURE_2D,
0,
hasalpha ? GL_RGBA : GL_RGB,
width,
height,
0,
hasalpha ? GL_BGRA : GL_BGR,
GL_UNSIGNED_BYTE,
data.get() );
delete[] data;
return std::make_pair(id, false);
return std::make_pair(id, hasalpha);
};
TTexturesManager::AlphaValue TTexturesManager::LoadTGA(std::string fileName, int filter)