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Updating affine for test. #311

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Updating affine for test. #311

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1343678
Updating affine.
iionichi May 23, 2023
c44ad66
updated affine transform
iionichi Jul 7, 2023
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63 changes: 45 additions & 18 deletions pyclesperanto_prototype/_tier8/affine_transform_2d_x.cl
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Original file line number Diff line number Diff line change
Expand Up @@ -34,7 +34,7 @@


#ifndef SAMPLER_FILTER
#define SAMPLER_FILTER CLK_FILTER_LINEAR
#define SAMPLER_FILTER CLK_FILTER_NEAREST
#endif

#ifndef SAMPLER_ADDRESS
Expand All @@ -53,43 +53,70 @@ __kernel void affine_transform_2d(
uint i = get_global_id(0);
uint j = get_global_id(1);

uint Nx = GET_IMAGE_WIDTH(output);
uint Ny = GET_IMAGE_HEIGHT(output);
uint Nx = GET_IMAGE_WIDTH(input)-1;
uint Ny = GET_IMAGE_HEIGHT(input)-1;

float x = i+0.5f;
float y = j+0.5f;
float x = i;
float y = j;

float y2 = (mat[3]*x+mat[4]*y+mat[5]);
float x2 = (mat[0]*x+mat[1]*y+mat[2]);

int2 coord_norm = (int2)(x2,y2);

// float2 frac_coord = (float2)(x2-floor(x2),y2-floor(y2));
float2 frac_coord = (float2)(x2/Nx,y2/Ny);
float2 frac_coord = (float2)(x2-coord_norm.x,y2-coord_norm.y);

float pix = 0;
if (x2 >= 0 && y2 >= 0 &&
x2 < GET_IMAGE_WIDTH(input) && y2 < GET_IMAGE_HEIGHT(input)
) {

// Get the corrdinates and color of the four surrounding pixels
int2 top_left_coord = coord_norm;
int2 top_right_coord = coord_norm + (int2)(1, 0);
int2 bottom_left_coord = coord_norm + (int2)(0, 1);
int2 bottom_right_coord = coord_norm + (int2)(1, 1);


// float2 top_left_coord = (float2)(coord_norm.x,coord_norm.y);
// float2 top_right_coord = (float2)((coord_norm.x+1),(coord_norm.y));
// float2 bottom_left_coord = (float2)((coord_norm.x),(coord_norm.y+1));
// float2 bottom_right_coord = (float2)((coord_norm.x+1),(coord_norm.y+1));

float2 top_left_coord = (float2)(coord_norm.x,coord_norm.y);
float2 top_right_coord =
(float2)((coord_norm.x+1) > Nx?(coord_norm.x-1):(coord_norm.x+1),(coord_norm.y));
float2 bottom_left_coord =
(float2)((coord_norm.x),(coord_norm.y+1)>Ny?(coord_norm.y-1):(coord_norm.y+1));
float2 bottom_right_coord =
(float2)((coord_norm.x+1)>Nx?(coord_norm.x-1):(coord_norm.x+1),(coord_norm.y+1)>Ny?(coord_norm.y-1):(coord_norm.y+1));

float top_left_color = (float) (READ_input_IMAGE(input, sampler, POS_input_INSTANCE(top_left_coord.x, top_left_coord.y, 0, 0)).x);
float top_right_color = (float) (READ_input_IMAGE(input, sampler, POS_input_INSTANCE(top_right_coord.x, top_right_coord.y, 0, 0)).x);
float bottom_left_color = (float) (READ_input_IMAGE(input, sampler, POS_input_INSTANCE(bottom_left_coord.x, bottom_left_coord.y, 0, 0)).x);
float bottom_right_color = (float) (READ_input_IMAGE(input, sampler, POS_input_INSTANCE(bottom_right_coord.x, bottom_right_coord.y, 0, 0)).x);

printf("coordinates: (%f,%f),%f (%f,%f),%f (%f,%f),%f (%f,%f),%f",
top_left_coord.x, top_left_coord.y, top_left_color,
top_right_coord.x, top_right_coord.y, top_right_color,
bottom_left_coord.x, bottom_left_coord.y,bottom_left_color,
bottom_right_coord.x, bottom_right_coord.y, bottom_right_color);

// if(top_left_color == top_right_color){
// top_right_coord = (float2)((coord_norm.x-1),(coord_norm.y));
// top_right_color = (float) (READ_input_IMAGE(input, sampler, POS_input_INSTANCE(top_right_coord.x, top_right_coord.y, 0, 0)).x);
// }
// if(top_left_color == bottom_left_color){
// bottom_left_coord = (float2)((coord_norm.x),(coord_norm.y-1));
// bottom_left_color = (float) (READ_input_IMAGE(input, sampler, POS_input_INSTANCE(bottom_left_coord.x, bottom_left_coord.y, 0, 0)).x);
// }
// if(top_left_color == bottom_right_color){
// bottom_right_coord = (float2)((coord_norm.x-1),(coord_norm.y-1));
// bottom_right_color = (float) (READ_input_IMAGE(input, sampler, POS_input_INSTANCE(bottom_right_coord.x, bottom_right_coord.y, 0, 0)).x);
// }

pix = (float) mix(mix(top_left_color, top_right_color, frac_coord.x), mix(bottom_left_color, bottom_right_color, frac_coord.x), frac_coord.y);
// pix = (float) (1 - frac_coord.y) * ((1 - frac_coord.x) * top_left_color + frac_coord.x * top_right_color) + frac_coord.y * ((1 - frac_coord.x) * bottom_left_color + frac_coord.x * bottom_right_color);
// pix = (float)(READ_input_IMAGE(input, sampler, POS_input_INSTANCE(x2, y2, 0, 0)).x);

// pix = frac_coord.x * frac_coord.y * top_left_color +
// (1-frac_coord.x) * frac_coord.y * top_right_color +
// frac_coord.x * (1-frac_coord.y) * bottom_right_color +
// (1-frac_coord.x) * (1-frac_coord.y) * bottom_left_color;
}

int2 pos = (int2){i, j};

WRITE_output_IMAGE(output, POS_output_INSTANCE(i, j, 0, 0), CONVERT_output_PIXEL_TYPE(pix));

}
}
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