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Fix T48691: Cycles - OpenCL - HDR Image mapping does not match CUDA rendering

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The OpenCL texture code didn't offset the coordinates by half a pixel like the CPU code does.
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Lukas Stockner
2016-06-21 00:49:25 +02:00
parent 93c6cf496e
commit 29ce3dfeb6
1 changed files with 2 additions and 2 deletions
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4
intern/cycles/kernel/svm/svm_image.h
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@@ -93,8 +93,8 @@ ccl_device float4 svm_image_texture(KernelGlobals *kg, int id, float x, float y,
r = svm_image_texture_read(kg, id, offset + ix + iy*width);
}
else { /* We default to linear interpolation if it is not closest */
float tx = svm_image_texture_frac(x*width, &ix);
float ty = svm_image_texture_frac(y*height, &iy);
float tx = svm_image_texture_frac(x*width - 0.5f, &ix);
float ty = svm_image_texture_frac(y*height - 0.5f, &iy);
if(periodic) {
ix = svm_image_texture_wrap_periodic(ix, width);