98 lines
2.8 KiB
Plaintext
98 lines
2.8 KiB
Plaintext
#include "common.effect"
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//------------------------------------------------------------------------------
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// Defines
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//------------------------------------------------------------------------------
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#define MAX_BLUR_SIZE 128
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//------------------------------------------------------------------------------
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// Technique: Directional / Area
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//------------------------------------------------------------------------------
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float4 PSBlur1D(VertexInformation vtx) : TARGET {
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float4 final = pImage.Sample(LinearClampSampler, vtx.uv);
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// Loop unrolling is only possible with a fixed known maximum.
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// Some compilers may unroll up to x iterations, but most will not.
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for (int n = 1; n <= MAX_BLUR_SIZE; n++) {
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float2 nstep = (pImageTexel * pStepScale) * n;
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final += pImage.Sample(LinearClampSampler, vtx.uv + nstep);
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final += pImage.Sample(LinearClampSampler, vtx.uv - nstep);
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if (n >= pSize) {
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break;
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}
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}
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final *= pSizeInverseMul;
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return final;
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}
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technique Draw {
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pass {
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vertex_shader = VSDefault(vtx);
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pixel_shader = PSBlur1D(vtx);
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}
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}
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//------------------------------------------------------------------------------
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// Technique: Rotate
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//------------------------------------------------------------------------------
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float4 PSRotate(VertexInformation vtx) : TARGET {
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float4 final = pImage.Sample(LinearClampSampler, vtx.uv);
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float angstep = pAngle * pStepScale.x;
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// Loop unrolling is only possible with a fixed known maximum.
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// Some compilers may unroll up to x iterations, but most will not.
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for (int n = 1; n <= MAX_BLUR_SIZE; n++) {
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final += pImage.Sample(LinearClampSampler, rotateAround(vtx.uv, pCenter, angstep * n));
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final += pImage.Sample(LinearClampSampler, rotateAround(vtx.uv, pCenter, angstep * -n));
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if (n >= pSize) {
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break;
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}
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}
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final *= pSizeInverseMul;
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return final;
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}
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technique Rotate {
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pass {
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vertex_shader = VSDefault(vtx);
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pixel_shader = PSRotate(vtx);
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}
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}
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//------------------------------------------------------------------------------
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// Technique: Zoom
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//------------------------------------------------------------------------------
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float4 PSZoom(VertexInformation vtx) : TARGET {
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float4 final = pImage.Sample(LinearClampSampler, vtx.uv);
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// step is calculated from the direction relative to the center
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float2 dir = normalize(vtx.uv - pCenter) * pStepScale * pImageTexel;
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float dist = distance(vtx.uv, pCenter);
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// Loop unrolling is only possible with a fixed known maximum.
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// Some compilers may unroll up to x iterations, but most will not.
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for (int n = 1; n <= MAX_BLUR_SIZE; n++) {
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final += pImage.Sample(LinearClampSampler, vtx.uv + (dir * n) * dist);
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final += pImage.Sample(LinearClampSampler, vtx.uv + (dir * -n) * dist);
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if (n >= pSize) {
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break;
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}
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}
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final *= pSizeInverseMul;
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return final;
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}
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technique Zoom {
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pass {
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vertex_shader = VSDefault(vtx);
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pixel_shader = PSZoom(vtx);
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}
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}
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