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#include "calcfirstder.cl" | ||
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// Aspect renderer for QGIS | ||
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__kernel void processNineCellWindow( __global float *scanLine1, | ||
__global float *scanLine2, | ||
__global float *scanLine3, | ||
__global uchar4 *resultLine, | ||
__global float *rasterParams | ||
) { | ||
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// Get the index of the current element | ||
const int i = get_global_id(0); | ||
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// Do the operation | ||
//return (( (x31 - x11) + 2 * (x32 - x12) + (x33 - x13) ) / (8 * mCellSizeX)) | ||
float derX = calcFirstDer( scanLine1[i], scanLine2[i], scanLine3[i], | ||
scanLine1[i+1], scanLine2[i+1], scanLine3[i+1], | ||
scanLine1[i+2], scanLine2[i+2], scanLine3[i+2], | ||
rasterParams[0], rasterParams[1], rasterParams[2], rasterParams[3] | ||
); | ||
//return (((x11 - x13) + 2 * (x21 - x23) + (x31 - x33)) / ( 8 * mCellSizeY)); | ||
float derY = calcFirstDer( scanLine1[i+2], scanLine1[i+1], scanLine1[i], | ||
scanLine2[i+2], scanLine2[i+1], scanLine2[i], | ||
scanLine3[i+2], scanLine3[i+1], scanLine3[i], | ||
rasterParams[0], rasterParams[1], rasterParams[2], rasterParams[4] | ||
); | ||
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float res; | ||
if ( derX == rasterParams[1] || derY == rasterParams[1] || | ||
( derX == 0.0f && derY == 0.0f) ) | ||
{ | ||
res = rasterParams[1]; | ||
} | ||
else | ||
{ | ||
// 180.0 / M_PI = 57.29577951308232 | ||
float aspect = atan2( derX, derY ) * 57.29577951308232; | ||
if ( aspect < 0 ) | ||
res = 90.0f - aspect; | ||
else if (aspect > 90.0f) | ||
// 360 + 90 = 450 | ||
res = 450.0f - aspect; | ||
else | ||
res = 90.0 - aspect; | ||
} | ||
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res = res / 360 * 255; | ||
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resultLine[i] = (uchar4)(res, res, res, 255); | ||
} | ||
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#include "calcfirstder.cl" | ||
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__constant sampler_t sampler = | ||
CLK_NORMALIZED_COORDS_FALSE | ||
| CLK_ADDRESS_CLAMP_TO_EDGE | ||
| CLK_FILTER_NEAREST; | ||
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__kernel void processNineCellWindow( | ||
__read_only image2d_t inputImage, | ||
image2d_t outputImage, | ||
__global float *rasterParams | ||
) { | ||
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// 0=width, 1=height | ||
int2 currentPosition = (int2)(get_global_id(0), get_global_id(1)); | ||
float4 currentPixel = (ufloat4)(0.0f); | ||
float4 calculatedPixel = (float4)(1.0f); | ||
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currentPixel = read_imageuf(inputImage, sampler, currentPosition); | ||
calculatedPixel = currentPixel; | ||
write_imageuf(outputImage, currentPosition, calculatedPixel); | ||
} | ||
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const sampler_t smp = CLK_NORMALIZED_COORDS_FALSE | CLK_ADDRESS_CLAMP_TO_EDGE | CLK_FILTER_LINEAR; | ||
__kernel void processNineCellWindow( __global float *scanLine1, | ||
__global float *scanLine2, | ||
__global float *scanLine3, | ||
__global uchar4 *resultLine, // This is an image BGRA ! | ||
__global float *rasterParams // [ mInputNodataValue, mOutputNodataValue, mZFactor, mCellSizeX, mCellSizeY, | ||
// azimuthRad, cosZenithRad, sinZenithRad ] | ||
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) { | ||
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// Get the index of the current element | ||
const int i = get_global_id(0); | ||
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// Do the operation | ||
//return (( (x31 - x11) + 2 * (x32 - x12) + (x33 - x13) ) / (8 * mCellSizeX)) | ||
float derX = calcFirstDer( scanLine1[i], scanLine2[i], scanLine3[i], | ||
scanLine1[i+1], scanLine2[i+1], scanLine3[i+1], | ||
scanLine1[i+2], scanLine2[i+2], scanLine3[i+2], | ||
rasterParams[0], rasterParams[1], rasterParams[2], rasterParams[3] | ||
); | ||
//return (((x11 - x13) + 2 * (x21 - x23) + (x31 - x33)) / ( 8 * mCellSizeY)); | ||
float derY = calcFirstDer( scanLine1[i+2], scanLine1[i+1], scanLine1[i], | ||
scanLine2[i+2], scanLine2[i+1], scanLine2[i], | ||
scanLine3[i+2], scanLine3[i+1], scanLine3[i], | ||
rasterParams[0], rasterParams[1], rasterParams[2], rasterParams[4] | ||
); | ||
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float res; | ||
if ( derX == rasterParams[1] || derY == rasterParams[1] ) | ||
{ | ||
res = rasterParams[1]; | ||
} | ||
else | ||
{ | ||
// 180.0 / M_PI = 57.29577951308232 | ||
float aspect = atan2( derX, derY ) * 57.29577951308232; | ||
if ( aspect < 0 ) | ||
aspect = 90.0f - aspect; | ||
else if (aspect > 90.0f) | ||
// 360 + 90 = 450 | ||
aspect = 450.0f - aspect; | ||
else | ||
aspect = 90.0 - aspect; | ||
// aspect = aspect / 360 * 255; // for display | ||
aspect = radians( aspect ); | ||
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float slope = sqrt( derX * derX + derY * derY ); | ||
slope = atan( slope ); | ||
// res = slope * M_PI * 255; for display | ||
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// Final | ||
res = 255.0f * ( rasterParams[6] * cos( slope ) | ||
+ rasterParams[7] * sin( slope ) | ||
* cos( rasterParams[5] - aspect ) ); | ||
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} | ||
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resultLine[i] = (uchar4)(res, res, res, 255); | ||
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void kernel copy(__read_only image2d_t in, image2d_t out) | ||
{ | ||
int x = get_global_id(0); | ||
int y = get_global_id(1); | ||
int2 pos = (int2)(x, y); | ||
uint4 pixel = read_imageui(in, smp, pos); | ||
write_imageui(out, pos, pixel); | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,45 @@ | ||
#include "calcfirstder.cl" | ||
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// Slope renderer for QGIS | ||
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__kernel void processNineCellWindow( __global float *scanLine1, | ||
__global float *scanLine2, | ||
__global float *scanLine3, | ||
__global uchar4 *resultLine, // This is an image BGRA ! | ||
__global float *rasterParams // [ mInputNodataValue, mOutputNodataValue, mZFactor, mCellSizeX, mCellSizeY ] | ||
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) { | ||
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// Get the index of the current element | ||
const int i = get_global_id(0); | ||
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// Do the operation | ||
//return (( (x31 - x11) + 2 * (x32 - x12) + (x33 - x13) ) / (8 * mCellSizeX)) | ||
float derX = calcFirstDer( scanLine1[i], scanLine2[i], scanLine3[i], | ||
scanLine1[i+1], scanLine2[i+1], scanLine3[i+1], | ||
scanLine1[i+2], scanLine2[i+2], scanLine3[i+2], | ||
rasterParams[0], rasterParams[1], rasterParams[2], rasterParams[3] | ||
); | ||
//return (((x11 - x13) + 2 * (x21 - x23) + (x31 - x33)) / ( 8 * mCellSizeY)); | ||
float derY = calcFirstDer( scanLine1[i+2], scanLine1[i+1], scanLine1[i], | ||
scanLine2[i+2], scanLine2[i+1], scanLine2[i], | ||
scanLine3[i+2], scanLine3[i+1], scanLine3[i], | ||
rasterParams[0], rasterParams[1], rasterParams[2], rasterParams[4] | ||
); | ||
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float res; | ||
if ( derX == rasterParams[1] || derY == rasterParams[1] ) | ||
{ | ||
res = rasterParams[1]; | ||
} | ||
else | ||
{ | ||
float slope = sqrt( derX * derX + derY * derY ); | ||
slope = atan( slope ); | ||
res = slope * 255; | ||
} | ||
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resultLine[i] = (uchar4)(res, res, res, 255); | ||
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} |