//this is a pixelshader like method, which we pass to the fill function
private unsafe void FillTexure(uint *data, int row, int col, int width, int height)
{
int index = (width * (height - row - 1) + col) * 4;
byte R = texBytes[curSlice][index + 2];
byte G = texBytes[curSlice][index + 1];
byte B = texBytes[curSlice][index];
byte A = 255;
// trasparency
/*
* byte bgR = 255;
* byte bgG = 255;
* byte bgB = 255;
* int precision = 15;
*
* if ((Math.Abs(R - bgR) < precision) &&
* (Math.Abs(G - bgG) < precision) &&
* (Math.Abs(B - bgB) < precision))
* A = 0;
*/
var pixel = UInt32Utils.fromARGB(A, R, G, B);
TextureUtils.SetPtrVal2D(data, pixel, row, col, width);
}
//this is a pixelshader like method, which we pass to the fill function
unsafe void FillTexure(uint *data, int row, int col, int width, int height, Info info)
{
//crate position in texture in the range [0..1]
var x = (double)row / height;
var y = (double)col / width;
//make some waves in the range [0..255]
var wave = (byte)(255 * ((Math.Sin(x * y * info.WaveCount * 10) + 1) / 2.0));
//a pixel is just a 32-bit unsigned int value
var pixel = UInt32Utils.fromARGB(255, wave, wave, wave);
//copy pixel into texture
TextureUtils.SetPtrVal2D(data, pixel, row, col, width);
}
//this is a pixelshader like method, which we pass to the fill function
unsafe void FillTexure(uint *data, int row, int col, int width, int height, Info info)
{
var pos = row * info.Stride + Math.Min(info.Width - 1, col) * info.ChannelCount;
if (info.Pixels.Length > pos)
{
var src = info.Pixels;
//a pixel is just a 32-bit unsigned int value
uint pixel = 0;
switch (info.ChannelCount)
{
//1 channel
case 1:
pixel = UInt32Utils.fromARGB(0, src[pos], src[pos], src[pos]);
break;
//3 channels
case 3:
pixel = UInt32Utils.fromARGB(0, src[pos], src[pos + 1], src[pos + 2]);
break;
//4 channels
case 4:
pixel = UInt32Utils.fromARGB(src[pos], src[pos + 1], src[pos + 2], src[pos + 3]);
break;
default:
pixel = UInt32Utils.fromARGB(0, 0, 0, 0);
break;
}
//copy pixel into texture
TextureUtils.SetPtrVal2D(data, pixel, row, col, width);
}
}
//this is a pixelshader like method, which we pass to the fill function
unsafe void FillTexture(uint *data, int row, int col, int width, int height, Info info)
{
// this method called per pixel
// row(vertical) & col(horizonal) are each pixel's position and width & height are texture size
// when 640x480, max row is 479 & max col is 639.
// sometimes col or row over width & height depends on enviroment, so ignore that
if (col >= info.Width || row >= info.Height)
{
return;
}
// GL.getPixels results is flipped vertically, so flip by (info.Height - row - 1)
int r = (col * 4) + ((info.Height - row - 1) * info.Width * 4); // 4 means R,G,B,A
//a pixel is just a 32-bit unsigned int value
uint pixel;
// from BGRA to ARGB
pixel = UInt32Utils.fromARGB(pixelBuffer[r + 3], pixelBuffer[r], pixelBuffer[r + 1], pixelBuffer[r + 2]);
//copy pixel into texture
TextureUtils.SetPtrVal2D(data, pixel, row, col, width);
}
