98 lines
3.1 KiB
Common Lisp
98 lines
3.1 KiB
Common Lisp
/*
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Copyright (c) 2009 David Bucciarelli (davibu@interfree.it)
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#define GPU_KERNEL
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#include "camera.h"
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#include "geomfunc.h"
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static void GenerateCameraRay(OCL_CONSTANT_BUFFER Camera *camera,
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unsigned int *seed0, unsigned int *seed1,
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const int width, const int height, const int x, const int y, Ray *ray) {
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const float invWidth = 1.f / width;
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const float invHeight = 1.f / height;
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const float r1 = GetRandom(seed0, seed1) - .5f;
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const float r2 = GetRandom(seed0, seed1) - .5f;
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const float kcx = (x + r1) * invWidth - .5f;
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const float kcy = (y + r2) * invHeight - .5f;
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Vec rdir;
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vinit(rdir,
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camera->x.x * kcx + camera->y.x * kcy + camera->dir.x,
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camera->x.y * kcx + camera->y.y * kcy + camera->dir.y,
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camera->x.z * kcx + camera->y.z * kcy + camera->dir.z);
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Vec rorig;
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vsmul(rorig, 0.1f, rdir);
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vadd(rorig, rorig, camera->orig)
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vnorm(rdir);
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rinit(*ray, rorig, rdir);
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}
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__kernel void RadianceGPU(
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__global Vec *colors, __global unsigned int *seedsInput,
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OCL_CONSTANT_BUFFER Sphere *sphere, OCL_CONSTANT_BUFFER Camera *camera,
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const unsigned int sphereCount,
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const int width, const int height,
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const int currentSample,
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__global int *pixels) {
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const int gid = get_global_id(0);
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const int gid2 = 2 * gid;
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const int x = gid % width;
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const int y = gid / width;
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/* Check if we have to do something */
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if (y >= height)
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return;
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/* LordCRC: move seed to local store */
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unsigned int seed0 = seedsInput[gid2];
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unsigned int seed1 = seedsInput[gid2 + 1];
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Ray ray;
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GenerateCameraRay(camera, &seed0, &seed1, width, height, x, y, &ray);
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Vec r;
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RadiancePathTracing(sphere, sphereCount, &ray, &seed0, &seed1, &r);
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const int i = (height - y - 1) * width + x;
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if (currentSample == 0) {
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// Jens's patch for MacOS
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vassign(colors[i], r);
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} else {
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const float k1 = currentSample;
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const float k2 = 1.f / (currentSample + 1.f);
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colors[i].x = (colors[i].x * k1 + r.x) * k2;
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colors[i].y = (colors[i].y * k1 + r.y) * k2;
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colors[i].z = (colors[i].z * k1 + r.z) * k2;
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}
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pixels[y * width + x] = toInt(colors[i].x) |
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(toInt(colors[i].y) << 8) |
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(toInt(colors[i].z) << 16);
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seedsInput[gid2] = seed0;
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seedsInput[gid2 + 1] = seed1;
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}
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