mitchellhansen
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conways-game-of-life-gpu
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Still some funky stuff going on off screen, probably because I'm abusing the hell out of the way OpenCL handles out of bounds arrays. But I consider this a rousing success

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master
MitchellHansen 9 years ago
parent e25de1bf46
commit 5929079075
1 changed files with 20 additions and 39 deletions
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59
Conway_OpenCL/HelloWorld.cpp
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@ -67,7 +67,7 @@ int main(int argc, char* argv[])
int WINDOW_Y = 1000;
int GRID_WIDTH = 1000;
int GRID_HEIGHT = 1000;
int WORKER_SIZE = 1000;
int WORKER_SIZE = 2000;
// ============================== OpenCL Setup ==================================================================
@ -147,7 +147,7 @@ int main(int argc, char* argv[])
// Setup the rng
std::mt19937 rng(time(NULL));
std::uniform_int_distribution<int> rgen(0, 4); // 25% chance
std::uniform_int_distribution<int> rgen(0, 20); // 25% chance
// Init the grid
char* grid = new char[GRID_WIDTH * GRID_HEIGHT* 2];
@ -179,11 +179,21 @@ int main(int argc, char* argv[])
int err = 0;
cl_mem inputBuffer = clCreateBuffer(context, CL_MEM_READ_WRITE | CL_MEM_COPY_HOST_PTR, GRID_WIDTH * GRID_HEIGHT * 2 * sizeof(char), (void*)grid, &err);
cl_mem workerCountBuffer = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, sizeof(int), &WORKER_SIZE, &err);
cl_mem gridWidthBuffer = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, sizeof(int), &GRID_WIDTH, &err);
cl_mem gridHeightBuffer = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, sizeof(int), &GRID_HEIGHT, &err);
status = clSetKernelArg(kernel, 0, sizeof(cl_mem), (void *)&inputBuffer);
status = clSetKernelArg(kernel, 1, sizeof(cl_mem), (void *)&workerCountBuffer);
status = clSetKernelArg(kernel, 2, sizeof(cl_mem), (void *)&gridWidthBuffer);
status = clSetKernelArg(kernel, 3, sizeof(cl_mem), (void *)&gridHeightBuffer);
sf::Uint8* pixel_array = new sf::Uint8[WINDOW_X * WINDOW_Y * 4];
sf::Texture texture;
texture.create(WINDOW_X, WINDOW_Y);
sf::Sprite sprite(texture);
// ===================================== Loop ==================================================================
while (window.isOpen()) {
@ -209,47 +219,21 @@ int main(int argc, char* argv[])
// ======================================= OpenCL Shtuff =============================================
// Implicit dead node color
window.clear(sf::Color(49, 68, 72));
cl_mem inputBuffer = clCreateBuffer(context, CL_MEM_READ_WRITE | CL_MEM_COPY_HOST_PTR, GRID_WIDTH * GRID_HEIGHT * 2 * sizeof(char), (void*)grid, &err);
cl_mem workerCountBuffer = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, sizeof(int), &WORKER_SIZE, &err);
cl_mem gridWidthBuffer = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, sizeof(int), &GRID_WIDTH, &err);
cl_mem gridHeightBuffer = clCreateBuffer(context, CL_MEM_READ_ONLY | CL_MEM_COPY_HOST_PTR, sizeof(int), &GRID_HEIGHT, &err);
status = clSetKernelArg(kernel, 0, sizeof(cl_mem), (void *)&inputBuffer);
status = clSetKernelArg(kernel, 1, sizeof(cl_mem), (void *)&workerCountBuffer);
status = clSetKernelArg(kernel, 2, sizeof(cl_mem), (void *)&gridWidthBuffer);
status = clSetKernelArg(kernel, 3, sizeof(cl_mem), (void *)&gridHeightBuffer);
// Update the data in GPU memory
status = clEnqueueWriteBuffer(commandQueue, inputBuffer, CL_TRUE, 0, GRID_WIDTH * GRID_HEIGHT * 2 * sizeof(char), (void*)grid, NULL, 0, NULL);
// Work size, for each y line
size_t global_work_size[1] = { GRID_HEIGHT };
size_t global_work_size[1] = { WORKER_SIZE };
// Run the kernel
status = clEnqueueNDRangeKernel(commandQueue, kernel, 1, NULL, global_work_size, NULL, 0, NULL, NULL);
// Get output, put back into grid
//cl_mem outputBuffer = clCreateBuffer(context, CL_MEM_WRITE_ONLY, GRID_WIDTH * GRID_HEIGHT * 2 * sizeof(char), grid, NULL);
status = clEnqueueReadBuffer(commandQueue, inputBuffer, CL_TRUE, 0, GRID_WIDTH * GRID_HEIGHT * 2 * sizeof(char), (void*)grid, 0, NULL, NULL);
// Temporary
status = clReleaseMemObject(inputBuffer);
status = clReleaseMemObject(workerCountBuffer);
status = clReleaseMemObject(gridWidthBuffer);
status = clReleaseMemObject(gridHeightBuffer);
// Swap status's
for (int i = 0; i < GRID_WIDTH * GRID_HEIGHT * 2; i += 2) {
grid[i] = grid[i + 1];
}
sf::Sprite sprite(texture);
for (int i = 0; i < GRID_WIDTH * GRID_HEIGHT * 2; i += 2) {
if (grid[i] == 1) {
pixel_array[(i/ 2) * 4] = 255; // R?
@ -268,13 +252,6 @@ int main(int argc, char* argv[])
texture.update(pixel_array);
window.draw(sprite);
//for (int i = 0; i < GRID_WIDTH * GRID_HEIGHT * 2; i += 2) {
// if (grid[i] == 1) {
// live_node.setPosition(sf::Vector2f(((i / 2) % GRID_WIDTH), (i / 2) / GRID_WIDTH));
// window.draw(live_node);
// }
//}
frame_count++;
window.display();
@ -282,7 +259,11 @@ int main(int argc, char* argv[])
}
// Temporary
status = clReleaseMemObject(inputBuffer);
status = clReleaseMemObject(workerCountBuffer);
status = clReleaseMemObject(gridWidthBuffer);
status = clReleaseMemObject(gridHeightBuffer);
/*Step 12: Clean the resources.*/
status = clReleaseKernel(kernel); //Release kernel.

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