joshua
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attractor-cl
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Joshua Moerman 10 years ago
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878e7d5cf2
commit
52963a17df
2 changed files with 76 additions and 114 deletions
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  1. 17
      resources/Kernel.cl
  2. 173
      src/main.cpp

17
resources/Kernel.cl
View File

@ -4,15 +4,24 @@ kernel void initialize(size_t width, size_t height, write_only image2d_t output)
size_t y = get_global_id(1);
int2 coord = {x, y};
uint4 color = {255 * x / (width - 1), 255 * y / (height - 1), 0, 255};
//uint4 color = {255 * x / (width - 1), 255 * y / (height - 1), 0, 255};
//uint4 color = {255 * (x%2), 120 * (y%2), 0, 255};
uint4 color = {255, 255, 0, 255};
write_imageui(output, coord, color);
}
kernel void square(global float* input, size_t width, global float* output){
kernel void update(size_t width, size_t height, read_only image2d_t input, write_only image2d_t output){
size_t x = get_global_id(0);
size_t y = get_global_id(1);
float i = 2.0 * (input[x + width*y] - 0.5);
output[x + width*y] = 0.5 + 0.5*sin((1.0 - i) * sin(i*i + 6.2*float(x)/width) + cos(1.0/i + 6.2*float(y)/width));
int2 coord = {x, y};
const sampler_t samplerA = CLK_NORMALIZED_COORDS_FALSE
| CLK_ADDRESS_NONE
| CLK_FILTER_NEAREST;
uint4 color = read_imageui(input, samplerA, coord).yzxw;
color.x = 255 - color.x;
write_imageui(output, coord, color);
}

173
src/main.cpp
View File

@ -46,7 +46,12 @@ struct App {
// ptrs to postpone construction, should clean this up
unique_ptr<cl::Context> cl_context;
unique_ptr<cl::Device> cl_device;
unique_ptr<cl::CommandQueue> cl_queue;
unique_ptr<cl::ImageGL> cl_image;
unique_ptr<cl::Program> cl_program;
unique_ptr<KernelOp> k_initialize;
unique_ptr<KernelOp> k_update;
float time = 0;
GLuint gl_texture = 0;
@ -83,69 +88,80 @@ struct App {
v.attribute(TEX_ATTR, quad_vbo, &Vertex::tex_coord);
}
GLuint create_texture(){
std::vector<GLubyte> data(4*W*H);
for(int i = 0; i < data.size(); i += 4){
data[i+0] = 255 * i / (W-1);
data[i+1] = 127;
data[i+2] = 0;
data[i+3] = 255;
}
GLuint create_gl_texture(){
GLuint tex = 0;
moggle::gl::active_texture(GL_TEXTURE0);
moggle::gl::generate_textures(1, &tex);
moggle::gl::bind_texture(GL_TEXTURE_2D, tex);
moggle::gl::texture_image_2d(GL_TEXTURE_2D, 0, GL_RGBA, W, H, 0, GL_RGBA, GL_UNSIGNED_BYTE, data.data());
moggle::gl::texture_image_2d(GL_TEXTURE_2D, 0, GL_RGBA, W, H, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
moggle::gl::texture_parameter_i(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
moggle::gl::texture_parameter_i(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
return tex;
}
void initialize(GLContext & gl_context){
// Fractal part
load_shader();
create_vao();
// create a texture for opencl
gl_texture = create_texture();
// share the bitch
// shared with opengl
void initialize_cl(GLContext & gl_context){
CGLShareGroupObj sharegroup = CGLGetShareGroup(gl_context.ctx);
cl_int err = 0;
cl_context_properties properties[] = { CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE, (cl_context_properties)sharegroup, 0 };
cl_context_properties properties[] = {
CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE, (cl_context_properties)sharegroup,
0
};
cl_context = make_unique<cl::Context>(CL_DEVICE_TYPE_CPU, properties, nullptr, nullptr, &err);
cl::checky(err);
auto cl_device = cl_context->getInfo<CL_CONTEXT_DEVICES>().front();
// obtain cl memory object
cl_image = make_unique<cl::ImageGL>(*cl_context, CL_MEM_WRITE_ONLY, GL_TEXTURE_2D, 0, gl_texture, &err);
cl_device = make_unique<cl::Device>(cl_context->getInfo<CL_CONTEXT_DEVICES>().front());
cl_queue = make_unique<cl::CommandQueue>(*cl_context, *cl_device, 0, &err);
cl::checky(err);
std::cout << *cl_image << std::endl; // sanity check
}
void load_cl_kernels(){
cl_int err = 0;
// build the program
auto KernelSource = slurp("Kernel.cl");
cl::Program program(*cl_context, {KernelSource.c_str(), KernelSource.size()}, true, &err);
cout << program.getBuildInfo<CL_PROGRAM_BUILD_LOG>(cl_device) << std::endl;
cl_program = make_unique<cl::Program>(*cl_context, slurp("Kernel.cl"), true, &err);
cout << cl_program->getBuildInfo<CL_PROGRAM_BUILD_LOG>(*cl_device) << std::endl;
cl::checky(err);
cout << *cl_program << endl;
// grab the kernels
k_initialize = make_unique<KernelOp>(*cl_program, "initialize", &err);
cl::checky(err);
cout << program << endl;
k_update = make_unique<KernelOp>(*cl_program, "update", &err);
cl::checky(err);
}
void initialize(GLContext & gl_context){
// gl part
load_shader();
create_vao();
gl_texture = create_gl_texture();
// cl part
initialize_cl(gl_context);
load_cl_kernels();
cl_int err = 0;
// grab the kernel
KernelOp kernel(program, "initialize", &err);
// obtain cl memory object
cl_image = make_unique<cl::ImageGL>(*cl_context, CL_MEM_READ_WRITE, GL_TEXTURE_2D, 0, gl_texture, &err);
cl::checky(err);
std::cout << *cl_image << std::endl;
// create a queue (for the first device)
cl::CommandQueue queue(*cl_context, cl_device);
cl::checky(kernel(queue, W, H, W, H, *cl_image));
cl::checky(queue.flush());
cl::checky((*k_initialize)(*cl_queue, W, H, W, H, *cl_image));
// no need for finish here, as we will always do a finish in draw(), before gl calls
}
void draw(){
time += 1/60.0f;
cl::checky((*k_update)(*cl_queue, W, H, W, H, *cl_image, *cl_image));
cl::checky(cl_queue->finish());
moggle::gl::clear_color(0.65f, 0.65f, 0.65f, 1.0f);
moggle::gl::clear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@ -158,99 +174,36 @@ struct App {
moggle::gl::draw_arrays(GL_TRIANGLE_STRIP, 0, 4);
}
};
struct CLApp {
void initialize(){
auto context = cl::Context::getDefault();
cout << context << endl;
cl_int err = 0;
// build the program
auto KernelSource = slurp("Kernel.cl");
cl::Program program(context, {KernelSource.c_str(), KernelSource.size()}, true, &err);
check(err);
cout << program << endl;
// grab the kernel
KernelOp kernel(program, "square", &err);
check(err);
// create a queue
cl::CommandQueue queue(context, context.getInfo<CL_CONTEXT_DEVICES>().front());
// make a lot of data
constexpr size_t W = 512;
constexpr size_t H = 512;
std::vector<cl_float> input_vector(W*H);
for(int y = 0; y < H; ++y){
for(int x = 0; x < W; ++x){
input_vector[x + W*y] = 10 * ((x / double(W) - 0.5) + 1.3371337*(y / double(H) - 0.5));
}
}
void resize(size_t w, size_t h){
W = w;
H = h;
// transfer data into buffers
cl::Buffer input(context, input_vector.begin(), input_vector.end(), false, true);
gl_texture = create_gl_texture();
int r = 10, g = 10, b = 10;
// DO IT (in place)
for(int i = 0; i < r; ++i){
check(kernel(queue, W, H, input, W, input));
}
// read back
queue.finish();
auto red = input_vector;
// DO IT (in place)
for(int i = 0; i < g; ++i){
check(kernel(queue, W, H, input, W, input));
}
// read back
queue.finish();
auto green = input_vector;
// DO IT (in place)
for(int i = 0; i < b; ++i){
check(kernel(queue, W, H, input, W, input));
}
// read back
queue.finish();
auto& blue = input_vector;
// test
cout << "opencl is done" << endl;
png::ostream<> image(W, H, "test.png");
for(int i = 0; i < red.size(); ++i){
image << png::ostream<>::pixel(blue[i], red[i], green[i]);
}
cout << "png is saved" << endl;
cl_int err = 0;
cl_image = make_unique<cl::ImageGL>(*cl_context, CL_MEM_READ_WRITE, GL_TEXTURE_2D, 0, gl_texture, &err);
cl::checky(err);
std::cout << *cl_image << std::endl;
cl::checky((*k_initialize)(*cl_queue, W, H, W, H, *cl_image));
}
};
int main() {
App a;
CLApp b;
NSAppWrapper app;
app.create_window({
[&](ContextParameters ctxp){
//b.initialize();
a.initialize(ctxp.context);
},
[&](ContextParameters){
a.draw();
},
nullptr
[&](ContextParameters, CGFloat w, CGFloat h){
a.resize(size_t(floor(w)), size_t(floor(h)));
}
});
app.run();