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now supports encoding to BMP as well as TGA, hooray

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This commit is contained in:
bill@Ixion
2009-09-05 14:07:05 -05:00
parent 3c2bd1bd9c
commit e21ce73554
3 changed files with 75 additions and 8 deletions
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src/modules/image/devil/ImageData.cpp
+66 -6
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@@ -169,13 +169,73 @@ namespace devil
ILubyte * data;
ILuint w = d->getWidth();
ILuint h = d->getHeight();
int headerLen, bpp;
int headerLen, bpp, row, size;
switch (f) {
case Image::FORMAT_TGA: // MSVC issues warning when there's no case statement.
default: // since we only support one format
case Image::FORMAT_BMP:
headerLen = 54;
bpp = 3;
row = w * bpp;
int padding = row & 3;
size = h * (row + padding);
int filesize = size + headerLen;
data = new ILubyte[filesize];
// Here's the header for the BMP file format.
data[0] = 66; // "B"
data[1] = 77; // "M"
data[2] = filesize; // size of the file
data[3] = (filesize >> 8) & 255;
data[4] = (filesize >> 16) & 255;
data[5] = (filesize >> 24) & 255;
data[6] = data[7] = data[8] = data[9] = 0; // useless reserved values
data[10] = headerLen; // offset where pixel data begins
data[11] = (headerLen >> 8) & 255;
data[12] = (headerLen >> 16) & 255;
data[13] = (headerLen >> 24) & 255;
data[14] = headerLen - 14; // length of this part of the header
data[15] = (data[14] >> 8) & 255;
data[16] = (data[14] >> 16) & 255;
data[17] = (data[14] >> 24) & 255;
data[18] = w; // width of the bitmap
data[19] = (w >> 8) & 255;
data[20] = (w >> 16) & 255;
data[21] = (w >> 24) & 255;
data[22] = -h; // negative height of the bitmap - used so we don't have to flip the data
data[23] = ((-h) >> 8) & 255;
data[24] = ((-h) >> 16) & 255;
data[25] = ((-h) >> 24) & 255;
data[26] = 1; // number of color planes
data[27] = 0;
data[28] = bpp * 8; // bits per pixel
data[29] = 0;
data[30] = data[31] = data[32] = data[33] = 0; // RGB - no compression
data[34] = (row + padding) * h; // length of the pixel data
data[35] = (data[34] >> 8) & 255;
data[36] = (data[34] >> 16) & 255;
data[37] = (data[34] >> 24) & 255;
data[38] = 2835; // horizontal pixels per meter
data[39] = (2835 >> 8) & 255;
data[40] = (2835 >> 16) & 255;
data[41] = (2835 >> 24) & 255;
data[42] = 2835; // vertical pixels per meter
data[43] = data[39];
data[44] = data[40];
data[45] = data[41];
data[46] = data[47] = data[48] = data[49] = 0; // number of colors in the palette
data[50] = data[51] = data[52] = data[53] = 0; // all colors are important!
// Okay, header's done! Now for the pixel data...
data += headerLen;
d->getData(); // bind the imagedata's image
for (int i = 0; i < h; i++) { // we've got to loop through the rows, adding the pixel data plus padding
ilCopyPixels(0,i,0,w,1,1,IL_BGR,IL_UNSIGNED_BYTE,data);
data += row;
}
data -= filesize;
break;
case Image::FORMAT_TGA:
default: // TGA is the default format
headerLen = 18;
bpp = 3;
int size = h * w * bpp;
size = h * w * bpp;
data = new ILubyte[size + headerLen];
// here's the header for the Targa file format.
data[0] = 0; // ID field size
@@ -199,7 +259,7 @@ namespace devil
ilCopyPixels(0,0,0,w,h,1,IL_BGR,IL_UNSIGNED_BYTE,data); // convert the pixels to BGR (remember, little-endian) and copy them to data
// It's Targa, so we have to flip the image.
int row = w * bpp;
row = w * bpp;
ILubyte * temp = new ILubyte[row];
ILubyte * src = data - row;
ILubyte * dst = data + size;
@@ -210,8 +270,8 @@ namespace devil
}
data -= headerLen;
delete [] temp;
return new love::image::EncodedImageData(data, f, size + headerLen);
}
return new love::image::EncodedImageData(data, f, size + headerLen);
}
} // devil