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Improving parallelism in fragment shader leading to more than 20x the framerate

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mo7sener
2019-12-26 23:07:03 +02:00
parent 2e6ddd2ff2
commit 6cef4df543
6 changed files with 48 additions and 27 deletions
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OpenWindow/kernels.cpp
+6 -5
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@@ -107,7 +107,7 @@ void vertex_shader(float* z, float* vertices, int vertex_count, float* new_verti
{
mat_z = clCreateBuffer(context, CL_MEM_READ_ONLY , sizeof(float) * MATRIX_SIZE , NULL, &err);
vertices_mem = clCreateBuffer(context, CL_MEM_READ_ONLY , sizeof(float) * vertex_count * 3, NULL, &err);
new_vertices_mem = clCreateBuffer(context, CL_MEM_WRITE_ONLY, sizeof(float) * vertex_count * 4, NULL, &err);
new_vertices_mem = clCreateBuffer(context, CL_MEM_WRITE_ONLY, sizeof(cl_float4) * vertex_count, NULL, &err);
err = clSetKernelArg(vertex_shader_kernel, 0, sizeof(cl_mem), &mat_z);
err = clSetKernelArg(vertex_shader_kernel, 1, sizeof(cl_mem), &vertices_mem);
@@ -134,7 +134,7 @@ void clear(cl_mem* buffer, size_t size, const int pattern) {
}
void fragment_shader(
int* faces,
cl_int3* faces,
int nfaces,
float* uv,
size_t uv_size,
@@ -149,7 +149,7 @@ void fragment_shader(
) {
if (!fragment_shader_buffers_initialized) {
faces_buffer = clCreateBuffer(context, CL_MEM_READ_ONLY , sizeof(int) * 3 * 3 * nfaces , NULL, &err);
faces_buffer = clCreateBuffer(context, CL_MEM_READ_ONLY , sizeof(cl_int3) * 3 * nfaces , NULL, &err);
pixel_data_buffer = clCreateBuffer(context, CL_MEM_WRITE_ONLY, sizeof(int) * screen_height * screen_width , NULL, &err);
screen_width_mem = clCreateBuffer(context, CL_MEM_READ_ONLY , sizeof(int) , NULL, &err);
z_buffer_mem = clCreateBuffer(context, CL_MEM_READ_ONLY , sizeof(float) * screen_height * screen_width, NULL, &err);
@@ -174,7 +174,7 @@ void fragment_shader(
err = clSetKernelArg(fragment_shader_kernel, 10, sizeof(cl_mem), &diffuse_map_buffer);
err = clEnqueueWriteBuffer(commands, screen_width_mem , CL_FALSE, 0, sizeof(int) , &screen_width , 0, NULL, NULL);
err = clEnqueueWriteBuffer(commands, faces_buffer , CL_FALSE, 0, sizeof(int) * 3 * 3 * nfaces , faces , 0, NULL, NULL);
err = clEnqueueWriteBuffer(commands, faces_buffer , CL_FALSE, 0, sizeof(cl_int3) * 3 * nfaces , faces , 0, NULL, NULL);
err = clEnqueueWriteBuffer(commands, nfaces_mem , CL_FALSE, 0, sizeof(int) , &nfaces , 0, NULL, NULL);
err = clEnqueueWriteBuffer(commands, uv_buffer , CL_FALSE, 0, uv_size , uv , 0, NULL, NULL);
err = clEnqueueWriteBuffer(commands, map_size_buffer , CL_FALSE, 0, sizeof(int) * 2 , map_size , 0, NULL, NULL);
@@ -190,7 +190,8 @@ void fragment_shader(
clear(&z_buffer_mem, sizeof(float) * screen_width * screen_height, 0);
size_t fragment_shader_global[] = { nfaces };
size_t fragment_shader_global[] = { nfaces * 256 };
size_t framgent_shader_local[] = { 256 };
err = clEnqueueNDRangeKernel(commands, fragment_shader_kernel, 1, NULL, fragment_shader_global, NULL, 0, NULL, NULL);