I am writing out a checker image to better understand setFramebuffer and writeTile
The current version I have stores the "entire" width+height black and white pixel data and choose from there.
I am hoping to find a way, possibly in setFramebuffer, where I can supply a tile size pixel data (one black, one white) to choose from rather than an entire width/height version which defeats the purpose of being able to handle/process pixels on a tile by tile basis.
void writeChecker (const char fileName[],
int width, int height,
int tileWidth, int tileHeight)
{
Imf::TiledRgbaOutputFile out (fileName,
width, height, // image size
tileWidth, tileHeight, // tile size
Imf::ONE_LEVEL, // level mode
Imf::ROUND_DOWN, // rounding mode
Imf::WRITE_RGBA); // channels in file // 1
int xTileCount = out.numXTiles();
int yTileCount = out.numYTiles();
RgbaArray whitePixels;
whitePixels.resize(boost::extents[width][height]);
for (RgbaArray::index h=0;h<height;h++)
for (RgbaArray::index w=0;w<width;w++)
{
whitePixels[w][h] = whitePixel;
}
RgbaArray blackPixels;
blackPixels.resize(boost::extents[width][height]);
for (RgbaArray::index h=0;h<height;h++)
for (RgbaArray::index w=0;w<width;w++)
{
blackPixels[w][h] = blackPixel;
}
for (int y=0;y<yTileCount;y++)
for (int x=0;x<xTileCount;x++)
{
bool isWhite = checkeredWhite(x,y);
if (isWhite)
out.setFrameBuffer (whitePixels.data(), 1, tileWidth);
else
out.setFrameBuffer (blackPixels.data(), 1, tileWidth);
out.writeTile (x,y);
}
}