/* Create a tinted texture by combining the tint map with the tint colors.
*
* This is currently all done here in software and has several drawbacks:
* - Slow
* - We're creating lots of uncompressed RBGA texture, so it
* takes up a lot of memory, both on the GPU and in system RAM
*
* TODO: We really need to do this in shaders in the future.
*/
void ModelNode_NWN2::createTint() {
if (_tintMap.empty())
return;
ImageDecoder *tintMap = 0;
Surface *tintedMap = 0;
try {
// Load and uncompress the texture
tintMap = Texture::loadImage(_tintMap);
if (tintMap->isCompressed())
tintMap->decompress();
const ImageDecoder::MipMap &tintImg = tintMap->getMipMap(0);
// Create a new target surface with the same dimensions
tintedMap = new Surface(tintImg.width, tintImg.height);
ImageDecoder::MipMap &tintedImg = tintedMap->getMipMap();
// Iterate over all pixels: read values, mix tints, write pixel to target surface
for (int n = 0; n < tintImg.width * tintImg.height; n++) {
float srcColor[4], dstColor[4] = { 0.0f, 0.0f, 0.0f, 1.0f };
tintImg.getPixel(n, srcColor[0], srcColor[1], srcColor[2], srcColor[3]);
if (srcColor[3] != 0.0f) {
// Mix using the value and the alpha components as intensities
// TODO: Verify how the mixing is actually done in NWN2!
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++)
dstColor[j] += _tint[i][j] * srcColor[i] * _tint[i][3] * srcColor[3] * _diffuse[i];
}
} else
// Source alpha is 0.0f: No tinting for this pixel
for (int i = 0; i < 3; i++)
dstColor[i] = _diffuse[i] * _tint[i][3];
tintedImg.setPixel(n, dstColor[0], dstColor[1], dstColor[2], dstColor[3]);
}
} catch (...) {
delete tintMap;
delete tintedMap;
return;
}
delete tintMap;
// And add the new texture to the TextureManager
TextureHandle tintedTexture = TextureMan.add(Texture::create(tintedMap));
_textures.push_back(tintedTexture);
_tintedMapIndex = _textures.size() - 1;
}
ImageDecoder *Texture::loadImage(Common::SeekableReadStream *imageStream, ::Aurora::FileType type,
TXI *txi) {
// Check for a cube map, but only those that don't use a file for each side
const bool isCubeMap = txi && txi->getFeatures().cube && (txi->getFeatures().fileRange == 0);
ImageDecoder *image = 0;
try {
// Loading the different image formats
if (type == ::Aurora::kFileTypeTGA)
image = new TGA(*imageStream, isCubeMap);
else if (type == ::Aurora::kFileTypeDDS)
image = new DDS(*imageStream);
else if (type == ::Aurora::kFileTypeTPC)
image = new TPC(*imageStream);
else if (type == ::Aurora::kFileTypeTXB)
image = new TXB(*imageStream);
else if (type == ::Aurora::kFileTypeSBM)
image = new SBM(*imageStream);
else if (type == ::Aurora::kFileTypeXEOSITEX)
image = new XEOSITEX(*imageStream);
else
throw Common::Exception("Unsupported image resource type %d", (int) type);
if (image->getMipMapCount() < 1)
throw Common::Exception("Texture has no images");
// Decompress
if (GfxMan.needManualDeS3TC())
image->decompress();
} catch (...) {
delete image;
delete imageStream;
throw;
}
delete imageStream;
return image;
}
ImageDecoder *Texture::loadImage(Common::SeekableReadStream *imageStream, ::Aurora::FileType type) {
ImageDecoder *image = 0;
try {
// Loading the different image formats
if (type == ::Aurora::kFileTypeTGA)
image = new TGA(*imageStream);
else if (type == ::Aurora::kFileTypeDDS)
image = new DDS(*imageStream);
else if (type == ::Aurora::kFileTypeTPC)
image = new TPC(*imageStream);
else if (type == ::Aurora::kFileTypeTXB)
image = new TXB(*imageStream);
else if (type == ::Aurora::kFileTypeSBM)
image = new SBM(*imageStream);
else if (type == ::Aurora::kFileTypeXEOSITEX)
image = new XEOSITEX(*imageStream);
else
throw Common::Exception("Unsupported image resource type %d", (int) type);
if (image->getMipMapCount() < 1)
throw Common::Exception("Texture has no images");
// Decompress
if (GfxMan.needManualDeS3TC())
image->decompress();
} catch (...) {
delete image;
delete imageStream;
throw;
}
delete imageStream;
return image;
}
