7006df5f
 David Mayerich
reformat of direc...
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#ifndef RTS_COLORMAP_H
#define RTS_COLORMAP_H
#include <string>
#include <stdlib.h>
#include "rts/cuda/error.h"
#define BREWER_CTRL_PTS 11
void qt_buffer2image(unsigned char* buffer, std::string filename, unsigned int x_size, unsigned int y_size);
static float BREWERCP[BREWER_CTRL_PTS*4] = {0.192157f, 0.211765f, 0.584314f, 1.0f,
0.270588f, 0.458824f, 0.705882f, 1.0f,
0.454902f, 0.678431f, 0.819608f, 1.0f,
0.670588f, 0.85098f, 0.913725f, 1.0f,
0.878431f, 0.952941f, 0.972549f, 1.0f,
1.0f, 1.0f, 0.74902f, 1.0f,
0.996078f, 0.878431f, 0.564706f, 1.0f,
0.992157f, 0.682353f, 0.380392f, 1.0f,
0.956863f, 0.427451f, 0.262745f, 1.0f,
0.843137f, 0.188235f, 0.152941f, 1.0f,
0.647059f, 0.0f, 0.14902f, 1.0f};
#ifdef __CUDACC__
texture<float4, cudaTextureType1D> cudaTexBrewer;
static cudaArray* gpuBrewer;
#endif
namespace rts{
enum colormapType {cmBrewer, cmGrayscale};
static void buffer2image(unsigned char* buffer, std::string filename, unsigned int x_size, unsigned int y_size)
{
qt_buffer2image(buffer, filename, x_size, y_size);
}
#ifdef __CUDACC__
static void initBrewer()
{
//initialize the Brewer colormap
//allocate CPU space
float4 cpuColorMap[BREWER_CTRL_PTS];
//define control rtsPoints
cpuColorMap[0] = make_float4(0.192157f, 0.211765f, 0.584314f, 1.0f);
cpuColorMap[1] = make_float4(0.270588f, 0.458824f, 0.705882f, 1.0f);
cpuColorMap[2] = make_float4(0.454902f, 0.678431f, 0.819608f, 1.0f);
cpuColorMap[3] = make_float4(0.670588f, 0.85098f, 0.913725f, 1.0f);
cpuColorMap[4] = make_float4(0.878431f, 0.952941f, 0.972549f, 1.0f);
cpuColorMap[5] = make_float4(1.0f, 1.0f, 0.74902f, 1.0f);
cpuColorMap[6] = make_float4(0.996078f, 0.878431f, 0.564706f, 1.0f);
cpuColorMap[7] = make_float4(0.992157f, 0.682353f, 0.380392f, 1.0f);
cpuColorMap[8] = make_float4(0.956863f, 0.427451f, 0.262745f, 1.0f);
cpuColorMap[9] = make_float4(0.843137f, 0.188235f, 0.152941f, 1.0f);
cpuColorMap[10] = make_float4(0.647059f, 0.0f, 0.14902f, 1.0f);
int width = BREWER_CTRL_PTS;
int height = 0;
// allocate array and copy colormap data
cudaChannelFormatDesc channelDesc = cudaCreateChannelDesc(32, 32, 32, 32, cudaChannelFormatKindFloat);
HANDLE_ERROR(cudaMallocArray(&gpuBrewer, &channelDesc, width, height));
HANDLE_ERROR(cudaMemcpyToArray(gpuBrewer, 0, 0, cpuColorMap, sizeof(float4)*width, cudaMemcpyHostToDevice));
// set texture parameters
cudaTexBrewer.addressMode[0] = cudaAddressModeClamp;
//texBrewer.addressMode[1] = cudaAddressModeClamp;
cudaTexBrewer.filterMode = cudaFilterModeLinear;
cudaTexBrewer.normalized = true; // access with normalized texture coordinates
// Bind the array to the texture
HANDLE_ERROR(cudaBindTextureToArray( cudaTexBrewer, gpuBrewer, channelDesc));
}
static void destroyBrewer()
{
HANDLE_ERROR(cudaFreeArray(gpuBrewer));
}
template<class T>
__global__ static void applyBrewer(T* gpuSource, unsigned char* gpuDest, unsigned int N, T minVal = 0, T maxVal = 1)
{
int i = blockIdx.y * gridDim.x * blockDim.x + blockIdx.x * blockDim.x + threadIdx.x;
if(i >= N) return;
//compute the normalized value on [minVal maxVal]
float a = (gpuSource[i] - minVal) / (maxVal - minVal);
//lookup the color
float shift = 1.0/(2*BREWER_CTRL_PTS);
float4 color = tex1D(cudaTexBrewer, a+shift);
//float4 color = tex1D(cudaTexBrewer, a);
gpuDest[i * 3 + 0] = 255 * color.x;
gpuDest[i * 3 + 1] = 255 * color.y;
gpuDest[i * 3 + 2] = 255 * color.z;
}
template<class T>
__global__ static void applyGrayscale(T* gpuSource, unsigned char* gpuDest, unsigned int N, T minVal = 0, T maxVal = 1)
{
int i = blockIdx.y * gridDim.x * blockDim.x + blockIdx.x * blockDim.x + threadIdx.x;
if(i >= N) return;
//compute the normalized value on [minVal maxVal]
float a = (gpuSource[i] - minVal) / (maxVal - minVal);
//threshold
if(a > 1.0)
a = 1.0;
if(a < 0.0)
a = 0.0;
gpuDest[i * 3 + 0] = 255 * a;
gpuDest[i * 3 + 1] = 255 * a;
gpuDest[i * 3 + 2] = 255 * a;
}
template<class T>
static void gpu2gpu(T* gpuSource, unsigned char* gpuDest, unsigned int nVals, T minVal = 0, T maxVal = 1, colormapType cm = cmGrayscale, int blockDim = 128)
{
//This function converts a scalar field on the GPU to a color image on the GPU
int gridX = (nVals + blockDim - 1)/blockDim;
int gridY = 1;
if(gridX > 65535)
{
gridY = (gridX + 65535 - 1) / 65535;
gridX = 65535;
}
dim3 dimGrid(gridX, gridY);
//int gridDim = (nVals + blockDim - 1)/blockDim;
if(cm == cmGrayscale)
applyGrayscale<<<dimGrid, blockDim>>>(gpuSource, gpuDest, nVals, minVal, maxVal);
else if(cm == cmBrewer)
{
initBrewer();
applyBrewer<<<dimGrid, blockDim>>>(gpuSource, gpuDest, nVals, minVal, maxVal);
//HANDLE_ERROR(cudaMemset(gpuDest, 0, sizeof(unsigned char) * nVals * 3));
destroyBrewer();
}
}
template<class T>
static void gpu2cpu(T* gpuSource, unsigned char* cpuDest, unsigned int nVals, T minVal, T maxVal, colormapType cm = cmGrayscale)
{
//this function converts a scalar field on the GPU to a color image on the CPU
//first create the color image on the GPU
//allocate GPU memory for the color image
unsigned char* gpuDest;
HANDLE_ERROR(cudaMalloc( (void**)&gpuDest, sizeof(unsigned char) * nVals * 3 ));
//HANDLE_ERROR(cudaMemset(gpuSource, 0, sizeof(T) * nVals));
//create the image on the gpu
gpu2gpu(gpuSource, gpuDest, nVals, minVal, maxVal, cm);
//HANDLE_ERROR(cudaMemset(gpuDest, 0, sizeof(unsigned char) * nVals * 3));
//copy the image from the GPU to the CPU
HANDLE_ERROR(cudaMemcpy(cpuDest, gpuDest, sizeof(unsigned char) * nVals * 3, cudaMemcpyDeviceToHost));
HANDLE_ERROR(cudaFree( gpuDest ));
}
template<typename T>
static void gpu2image(T* gpuSource, std::string fileDest, unsigned int x_size, unsigned int y_size, T valMin, T valMax, colormapType cm = cmGrayscale)
{
//allocate a color buffer
unsigned char* cpuBuffer = NULL;
cpuBuffer = (unsigned char*) malloc(sizeof(unsigned char) * 3 * x_size * y_size);
//do the mapping
gpu2cpu<T>(gpuSource, cpuBuffer, x_size * y_size, valMin, valMax, cm);
//copy the buffer to an image
buffer2image(cpuBuffer, fileDest, x_size, y_size);
free(cpuBuffer);
}
#endif
template<class T>
static void cpuApplyBrewer(T* cpuSource, unsigned char* cpuDest, unsigned int N, T minVal = 0, T maxVal = 1)
{
for(int i=0; i<N; i++)
{
//compute the normalized value on [minVal maxVal]
T v = cpuSource[i];
float a = (cpuSource[i] - minVal) / (maxVal - minVal);
if(a < 0) a = 0;
if(a > 1) a = 1;
float c = a * (float)(BREWER_CTRL_PTS-1);
int ptLow = (int)c;
float m = c - (float)ptLow;
//std::cout<<m<<std::endl;
float r, g, b;
if(ptLow == BREWER_CTRL_PTS - 1)
{
r = BREWERCP[ptLow * 4 + 0];
g = BREWERCP[ptLow * 4 + 1];
b = BREWERCP[ptLow * 4 + 2];
}
else
{
r = BREWERCP[ptLow * 4 + 0] * (1.0-m) + BREWERCP[ (ptLow+1) * 4 + 0] * m;
g = BREWERCP[ptLow * 4 + 1] * (1.0-m) + BREWERCP[ (ptLow+1) * 4 + 1] * m;
b = BREWERCP[ptLow * 4 + 2] * (1.0-m) + BREWERCP[ (ptLow+1) * 4 + 2] * m;
}
cpuDest[i * 3 + 0] = 255 * r;
cpuDest[i * 3 + 1] = 255 * g;
cpuDest[i * 3 + 2] = 255 * b;
}
}
template<class T>
static void cpu2cpu(T* cpuSource, unsigned char* cpuDest, unsigned int nVals, T valMin, T valMax, colormapType cm = cmGrayscale)
{
if(cm == cmBrewer)
cpuApplyBrewer(cpuSource, cpuDest, nVals, valMin, valMax);
else if(cm == cmGrayscale)
{
int i;
float a;
float range = valMax - valMin;
for(i = 0; i<nVals; i++)
{
//normalize to the range [valMin valMax]
a = (cpuSource[i] - valMin) / range;
if(a < 0) a = 0.0;
if(a > 1) a = 1.0;
cpuDest[i * 3 + 0] = 255 * a;
cpuDest[i * 3 + 1] = 255 * a;
cpuDest[i * 3 + 2] = 255 * a;
}
}
}
template<class T>
static void cpu2cpu(T* cpuSource, unsigned char* cpuDest, unsigned int nVals, colormapType cm = cmGrayscale, bool positive = false)
{
//computes the max and min range automatically
//find the largest magnitude value
T maxVal = fabs(cpuSource[0]);
for(int i=0; i<nVals; i++)
{
if(fabs(cpuSource[i]) > maxVal)
maxVal = fabs(cpuSource[i]);
}
if(positive)
cpu2cpu(cpuSource, cpuDest, nVals, (T)0.0, maxVal, cm);
else
cpu2cpu(cpuSource, cpuDest, nVals, -maxVal, maxVal, cm);
}
template<typename T>
static void cpu2image(T* cpuSource, std::string fileDest, unsigned int x_size, unsigned int y_size, T valMin, T valMax, colormapType cm = cmGrayscale)
{
//allocate a color buffer
unsigned char* cpuBuffer = (unsigned char*) malloc(sizeof(unsigned char) * 3 * x_size * y_size);
//do the mapping
cpu2cpu<T>(cpuSource, cpuBuffer, x_size * y_size, valMin, valMax, cm);
//copy the buffer to an image
buffer2image(cpuBuffer, fileDest, x_size, y_size);
free(cpuBuffer);
}
template<typename T>
static void cpu2image(T* cpuSource, std::string fileDest, unsigned int x_size, unsigned int y_size, colormapType cm = cmGrayscale, bool positive = false)
{
//allocate a color buffer
unsigned char* cpuBuffer = (unsigned char*) malloc(sizeof(unsigned char) * 3 * x_size * y_size);
//do the mapping
cpu2cpu<T>(cpuSource, cpuBuffer, x_size * y_size, cm, positive);
//copy the buffer to an image
buffer2image(cpuBuffer, fileDest, x_size, y_size);
free(cpuBuffer);
}
} //end namespace colormap and rts
#endif
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