public void SetSamplingSource(FloatRGBBmp bmp)
{
_samplingSrc = bmp;
if (_samplingSrc != null)
{
_sW = bmp.Width;
_sH = bmp.Height;
}
}
static FloatRGBBmp CreatePixel3Bitmap(Bitmap bmp)
{
var bmpdata = bmp.LockBits(new System.Drawing.Rectangle(0, 0, bmp.Width, bmp.Height), System.Drawing.Imaging.ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
int[] buffer = new int[bmp.Width * bmp.Height];
System.Runtime.InteropServices.Marshal.Copy(bmpdata.Scan0, buffer, 0, bmp.Width * bmp.Height);
bmp.UnlockBits(bmpdata);
FloatRGBBmp pix3fbmp = new FloatRGBBmp(bmp.Width, bmp.Height);
FloatRGB[] buffer3f = pix3fbmp._buffer;
for (int i = 0; i < buffer.Length; ++i)
{
int pixel = buffer[i];
//rgb
float r = (pixel & 0xff) / 255f;
float g = ((pixel >> 8) & 0xff) / 255f;
float b = ((pixel >> 16) & 0xff) / 255f;
buffer3f[i] = new FloatRGB(r, g, b);
}
return(pix3fbmp);
}
void GenerateMsdfOutput3(string msdfImg)
{
//generate msdf output
//from msdf fragment shader
//#ifdef GL_OES_standard_derivatives
// #extension GL_OES_standard_derivatives : enable
// #endif
// precision mediump float;
// varying vec2 v_texCoord;
// uniform sampler2D s_texture; //msdf texture
// uniform vec4 u_color;
// float median(float r, float g, float b) {
// return max(min(r, g), min(max(r, g), b));
// }
// void main() {
// vec4 sample = texture2D(s_texture, v_texCoord);
// float sigDist = median(sample[0], sample[1], sample[2]) - 0.5;
// float opacity = clamp(sigDist/fwidth(sigDist) + 0.5, 0.0, 1.0);
// gl_FragColor= vec4(u_color[0],u_color[1],u_color[2],opacity * u_color[3]);
// }
DisposeExistingPictureBoxImage(pictureBox1);
Bitmap msdf_bmp = new Bitmap(msdfImg);
this.pictureBox1.Image = msdf_bmp;
FloatRGBBmp pixel3fBmp = CreatePixel3Bitmap(msdf_bmp);
int px_index = 0;
int px_height = msdf_bmp.Height;
int px_width = msdf_bmp.Width;
int[] output = new int[px_width * px_height];
bool onlySignDist = chkOnlySignDist.Checked;
Pixel3fSampling9 sm = new Pixel3fSampling9();
sm.SetSamplingSource(pixel3fBmp);
if ((int)cmdSamplingSize.SelectedItem == 9)
{
sm.N = 9;
}
else
{
sm.N = 5;
}
for (int y = 1; y < px_height - 1; ++y)
{
int x = 1;
px_index = x + (px_width * y);
for (; x < px_width - 1; ++x)
{
//each pixel
sm.Sampling(x, y);
FloatRGB rgb = sm.WeightAvg();
float r = rgb.r;
float g = rgb.g;
float b = rgb.b;
float sigDist = median(r, g, b) - 0.5f;
float toClamp = sigDist;
sm.Sampling(x + 1, y);
FloatRGB next_right = sm.WeightAvg();
float d_r1 = next_right.r - r;
float d_g1 = next_right.g - g;
float d_b1 = next_right.b - b;
//get bottom px
sm.Sampling(x, y + 1);
FloatRGB bottom = sm.WeightAvg();
float d_ry = bottom.r - r;
float d_gy = bottom.g - g;
float d_by = bottom.b - b;
//for test only
//fake gles fwidth
float fwidth = Math.Abs(((d_r1 + d_g1 + d_b1) / 3f)) + Math.Abs(((d_ry + d_gy + d_by) / 3f));
toClamp = onlySignDist ? sigDist : sigDist / (fwidth);
//float opacity = clamp(sigDist/fwidth(sigDist) + 0.5, 0.0, 1.0);
float opacity = (float)Math.Max(0, Math.Min(toClamp + 0.5, 1));
byte o_r = 0;
byte o_g = 0;
byte o_b = 0;
byte o_a = (byte)(255 * opacity);
output[px_index] = (o_a << 24) | (o_b << 16) | (o_g << 8) | o_r;
px_index++;
}
}
Bitmap output2 = new Bitmap(msdf_bmp.Width, msdf_bmp.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
var bmpdata2 = output2.LockBits(new System.Drawing.Rectangle(0, 0, msdf_bmp.Width, msdf_bmp.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, output2.PixelFormat);
System.Runtime.InteropServices.Marshal.Copy(output, 0, bmpdata2.Scan0, output.Length);
output2.UnlockBits(bmpdata2);
DisposeExistingPictureBoxImage(pictureBox2);
pictureBox2.Image = output2;
}
void GenerateMsdfOutput2()
{
//generate msdf output
//from msdf fragment shader
//#ifdef GL_OES_standard_derivatives
// #extension GL_OES_standard_derivatives : enable
// #endif
// precision mediump float;
// varying vec2 v_texCoord;
// uniform sampler2D s_texture; //msdf texture
// uniform vec4 u_color;
// float median(float r, float g, float b) {
// return max(min(r, g), min(max(r, g), b));
// }
// void main() {
// vec4 sample = texture2D(s_texture, v_texCoord);
// float sigDist = median(sample[0], sample[1], sample[2]) - 0.5;
// float opacity = clamp(sigDist/fwidth(sigDist) + 0.5, 0.0, 1.0);
// gl_FragColor= vec4(u_color[0],u_color[1],u_color[2],opacity * u_color[3]);
// }
string msdfImg = listBox1.SelectedItem as string;
Bitmap bmp = new Bitmap(msdfImg);
this.pictureBox1.Image = bmp;
FloatRGBBmp pixel3fBmp = CreatePixel3Bitmap(bmp);
int px_index = 0;
int px_height = bmp.Height;
int px_width = bmp.Width;
int line_head = 0;
int nextline_head = 0;
FloatRGB[] pixel3fBuffer = pixel3fBmp._buffer;
int[] output = new int[px_width * px_height];
bool onlySignDist = chkOnlySignDist.Checked;
for (int y = 0; y < px_height - 1; ++y)
{
line_head = y * px_width;
nextline_head = (y + 1) * px_width;
px_index = y * px_width;
int i = 0;
for (int x = 0; x < px_width - 1; ++x)
{
//each pixel
FloatRGB rgb = pixel3fBuffer[line_head + i];
float r = rgb.r;
float g = rgb.g;
float b = rgb.b;
float sigDist = median(r, g, b) - 0.5f;
float toClamp = sigDist;
//get right px
FloatRGB next_right = pixel3fBuffer[line_head + i + 1];
float d_r1 = next_right.r - r;
float d_g1 = next_right.g - g;
float d_b1 = next_right.b - b;
//get bottom px
FloatRGB bottom = pixel3fBuffer[nextline_head + i];
float d_ry = bottom.r - r;
float d_gy = bottom.g - g;
float d_by = bottom.b - b;
//for test only
//fake gles fwidth
float fwidth = Math.Abs(((d_r1 + d_g1 + d_b1) / 3f)) + Math.Abs(((d_ry + d_gy + d_by) / 3f));
toClamp = onlySignDist ? sigDist : sigDist / (fwidth);
//float opacity = clamp(sigDist/fwidth(sigDist) + 0.5, 0.0, 1.0);
float opacity = (float)Math.Max(0, Math.Min(toClamp + 0.5, 1));
byte o_r = 0;
byte o_g = 0;
byte o_b = 0;
byte o_a = (byte)(255 * opacity);
output[px_index] = (o_a << 24) | (o_b << 16) | (o_g << 8) | o_r;
px_index++;
i++;
}
}
Bitmap output2 = new Bitmap(bmp.Width, bmp.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
var bmpdata2 = output2.LockBits(new System.Drawing.Rectangle(0, 0, bmp.Width, bmp.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, output2.PixelFormat);
System.Runtime.InteropServices.Marshal.Copy(output, 0, bmpdata2.Scan0, output.Length);
output2.UnlockBits(bmpdata2);
pictureBox2.Image = output2;
}