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@ -17,187 +17,187 @@ using namespace std; |
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#define BUFFER_OFFSET(i) ((char *)NULL + (i)) |
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const GLfloat quad[] = { |
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// x y z, r g b
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1, -1, 0, 1, 0, 0, |
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-1, -1, 0, 0, 1, 0, |
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1, 1, 0, 0, 0, 1, |
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-1, 1, 0, 1, 1, 1 |
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// x y z, r g b
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1, -1, 0, 1, 0, 0, |
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-1, -1, 0, 0, 1, 0, |
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1, 1, 0, 0, 0, 1, |
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-1, 1, 0, 1, 1, 1 |
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}; |
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static void check_shader(GLuint s){ |
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GLint logLength; |
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glGetShaderiv(s, GL_INFO_LOG_LENGTH, &logLength); |
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if (logLength > 0) { |
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GLchar *log = (GLchar *)malloc(logLength); |
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glGetShaderInfoLog(s, logLength, &logLength, log); |
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std::cout << "Shader compile log:\n%s" << log << std::endl; |
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free(log); |
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} |
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GLint logLength; |
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glGetShaderiv(s, GL_INFO_LOG_LENGTH, &logLength); |
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if (logLength > 0) { |
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GLchar *log = (GLchar *)malloc(logLength); |
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glGetShaderInfoLog(s, logLength, &logLength, log); |
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std::cout << "Shader compile log:\n%s" << log << std::endl; |
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free(log); |
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} |
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} |
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string slurp(string filename) { |
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ifstream in(filename); |
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stringstream sstr; |
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sstr << in.rdbuf(); |
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return sstr.str(); |
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ifstream in(filename); |
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stringstream sstr; |
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sstr << in.rdbuf(); |
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return sstr.str(); |
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} |
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struct App { |
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float time; |
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GLuint program; |
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GLint uniform; |
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GLuint vao; |
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GLuint posBufferName; |
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void initialize(){ |
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time = 0; |
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program = glCreateProgram(); |
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auto v_source_str = slurp("Fractal.vsh"); |
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auto v_source = v_source_str.c_str(); |
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GLuint v = glCreateShader(GL_VERTEX_SHADER); |
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glShaderSource(v, 1, &v_source, NULL); |
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glCompileShader(v); |
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check_shader(v); |
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auto f_source_str = slurp("Fractal.fsh"); |
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auto f_source = f_source_str.c_str(); |
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GLuint f = glCreateShader(GL_FRAGMENT_SHADER); |
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glShaderSource(f, 1, &f_source, NULL); |
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glCompileShader(f); |
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check_shader(f); |
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glAttachShader(program, v); |
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glAttachShader(program, f); |
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glBindAttribLocation(program, 0, "position"); |
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glBindAttribLocation(program, 1, "color"); |
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glLinkProgram(program); |
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uniform = glGetUniformLocation(program, "rotation"); |
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glDetachShader(program, v); |
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glDeleteShader(v); |
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glDetachShader(program, f); |
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glDeleteShader(f); |
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glGenVertexArrays(1, &vao); |
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glBindVertexArray(vao); |
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float time; |
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GLuint program; |
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GLint uniform; |
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GLuint vao; |
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GLuint posBufferName; |
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void initialize(){ |
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time = 0; |
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program = glCreateProgram(); |
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auto v_source_str = slurp("Fractal.vsh"); |
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auto v_source = v_source_str.c_str(); |
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GLuint v = glCreateShader(GL_VERTEX_SHADER); |
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glShaderSource(v, 1, &v_source, NULL); |
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glCompileShader(v); |
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check_shader(v); |
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auto f_source_str = slurp("Fractal.fsh"); |
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auto f_source = f_source_str.c_str(); |
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GLuint f = glCreateShader(GL_FRAGMENT_SHADER); |
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glShaderSource(f, 1, &f_source, NULL); |
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glCompileShader(f); |
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check_shader(f); |
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glAttachShader(program, v); |
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glAttachShader(program, f); |
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glBindAttribLocation(program, 0, "position"); |
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glBindAttribLocation(program, 1, "color"); |
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glLinkProgram(program); |
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uniform = glGetUniformLocation(program, "rotation"); |
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glDetachShader(program, v); |
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glDeleteShader(v); |
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glDetachShader(program, f); |
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glDeleteShader(f); |
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glGenVertexArrays(1, &vao); |
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glBindVertexArray(vao); |
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glGenBuffers(1, &posBufferName); |
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glBindBuffer(GL_ARRAY_BUFFER, posBufferName); |
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glBufferData(GL_ARRAY_BUFFER, 4*6*4, quad, GL_STATIC_DRAW); |
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glEnableVertexAttribArray(0); |
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glEnableVertexAttribArray(1); |
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6*4, BUFFER_OFFSET(0)); |
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6*4, BUFFER_OFFSET(3*4)); |
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} |
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void draw(){ |
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time += 1/60.0f; |
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glClearColor(0.65f, 0.65f, 0.65f, 1.0f); |
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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glUseProgram(program); |
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glUniform1f(uniform, time); |
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glBindVertexArray(vao); |
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |
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} |
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glBufferData(GL_ARRAY_BUFFER, 4*6*4, quad, GL_STATIC_DRAW); |
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glEnableVertexAttribArray(0); |
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glEnableVertexAttribArray(1); |
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6*4, BUFFER_OFFSET(0)); |
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glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6*4, BUFFER_OFFSET(3*4)); |
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} |
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void draw(){ |
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time += 1/60.0f; |
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glClearColor(0.65f, 0.65f, 0.65f, 1.0f); |
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
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glUseProgram(program); |
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glUniform1f(uniform, time); |
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glBindVertexArray(vao); |
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4); |
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} |
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}; |
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int main(){ |
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App a; |
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NSAppWrapper app; |
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app.create_window({ |
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[&](ContextParameters){ |
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a.initialize(); |
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}, |
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[&](ContextParameters){ |
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a.draw(); |
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}, |
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nullptr |
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}); |
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app.run(); |
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auto context = cl::Context::getDefault(); |
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cout << context << endl; |
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cl_int err = 0; |
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// build the program
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auto KernelSource = slurp("Kernel.cl"); |
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cl::Program program(context, {KernelSource.c_str(), KernelSource.size()}, true, &err); |
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check(err); |
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cout << program << endl; |
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// grab the kernel
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KernelOp kernel(program, "square", &err); |
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check(err); |
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// create a queue
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cl::CommandQueue queue(context, context.getInfo<CL_CONTEXT_DEVICES>().front()); |
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// make a lot of data
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constexpr size_t W = 1280 * 4; |
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constexpr size_t H = 800 * 4; |
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std::vector<cl_float> input_vector(W*H); |
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for(int y = 0; y < H; ++y){ |
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for(int x = 0; x < W; ++x){ |
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input_vector[x + W*y] = 10 * ((x / double(W) - 0.5) + 1.3371337*(y / double(H) - 0.5)); |
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} |
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} |
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// transfer data into buffers
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cl::Buffer input(context, input_vector.begin(), input_vector.end(), false, true); |
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int r = 80, g = 40, b = 20; |
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// DO IT (in place)
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for(int i = 0; i < r; ++i){ |
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check(kernel(queue, W, H, input, W, input)); |
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} |
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// read back
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queue.finish(); |
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auto red = input_vector; |
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// DO IT (in place)
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for(int i = 0; i < g; ++i){ |
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check(kernel(queue, W, H, input, W, input)); |
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} |
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// read back
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queue.finish(); |
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auto green = input_vector; |
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// DO IT (in place)
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for(int i = 0; i < b; ++i){ |
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check(kernel(queue, W, H, input, W, input)); |
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} |
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// read back
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queue.finish(); |
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auto& blue = input_vector; |
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// test
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cout << "opencl is done" << endl; |
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png::ostream<> image(W, H, "test.png"); |
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for(int i = 0; i < red.size(); ++i){ |
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image << png::ostream<>::pixel(blue[i], red[i], green[i]); |
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} |
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cout << "png is saved" << endl; |
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App a; |
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NSAppWrapper app; |
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app.create_window({ |
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[&](ContextParameters){ |
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a.initialize(); |
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}, |
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[&](ContextParameters){ |
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a.draw(); |
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}, |
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nullptr |
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}); |
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app.run(); |
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auto context = cl::Context::getDefault(); |
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cout << context << endl; |
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cl_int err = 0; |
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// build the program
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auto KernelSource = slurp("Kernel.cl"); |
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cl::Program program(context, {KernelSource.c_str(), KernelSource.size()}, true, &err); |
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check(err); |
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cout << program << endl; |
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// grab the kernel
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KernelOp kernel(program, "square", &err); |
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check(err); |
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// create a queue
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cl::CommandQueue queue(context, context.getInfo<CL_CONTEXT_DEVICES>().front()); |
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// make a lot of data
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constexpr size_t W = 1280 * 4; |
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constexpr size_t H = 800 * 4; |
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std::vector<cl_float> input_vector(W*H); |
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for(int y = 0; y < H; ++y){ |
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for(int x = 0; x < W; ++x){ |
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input_vector[x + W*y] = 10 * ((x / double(W) - 0.5) + 1.3371337*(y / double(H) - 0.5)); |
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} |
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} |
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// transfer data into buffers
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cl::Buffer input(context, input_vector.begin(), input_vector.end(), false, true); |
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int r = 80, g = 40, b = 20; |
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// DO IT (in place)
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for(int i = 0; i < r; ++i){ |
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check(kernel(queue, W, H, input, W, input)); |
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} |
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// read back
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queue.finish(); |
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auto red = input_vector; |
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// DO IT (in place)
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for(int i = 0; i < g; ++i){ |
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check(kernel(queue, W, H, input, W, input)); |
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} |
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// read back
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queue.finish(); |
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auto green = input_vector; |
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// DO IT (in place)
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for(int i = 0; i < b; ++i){ |
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check(kernel(queue, W, H, input, W, input)); |
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} |
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// read back
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queue.finish(); |
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auto& blue = input_vector; |
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// test
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cout << "opencl is done" << endl; |
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png::ostream<> image(W, H, "test.png"); |
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for(int i = 0; i < red.size(); ++i){ |
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image << png::ostream<>::pixel(blue[i], red[i], green[i]); |
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} |
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cout << "png is saved" << endl; |
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} |
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Joshua Moerman
11 years ago