290 lines
6.8 KiB
C
290 lines
6.8 KiB
C
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#include <stdlib.h>
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#include <string.h>
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#define _USE_MATH_DEFINES //NOTE: necessary for MSVC
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define OC_INCLUDE_GL_API
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#include "orca.h"
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#ifdef OC_PLATFORM_WINDOWS
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#include <process.h>
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#include <io.h>
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#include <fcntl.h>
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#define dup2 _dup2
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#define pipe(fds) _pipe(fds, 256, O_BINARY)
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#define read _read
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#define write _write
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#define process_id HANDLE
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process_id spawn_child(char* program, char** argv)
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{
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return ((process_id)_spawnv(P_NOWAIT, program, argv));
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}
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void terminate_child(process_id child)
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{
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TerminateProcess(child, 0);
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}
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#elif OC_PLATFORM_MACOS
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#include <unistd.h>
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#include <signal.h>
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#define process_id pid_t
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process_id spawn_child(char* program, char** argv)
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{
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pid_t pid = fork();
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if(!pid)
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{
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char* envp[] = { 0 };
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execve(program, argv, envp);
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OC_ASSERT(0);
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}
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return (pid);
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}
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void terminate_child(process_id child)
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{
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kill(child, SIGTERM);
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}
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#endif
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unsigned int program;
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const char* vshaderSource =
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//"#version 320 es\n"
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"attribute vec4 vPosition;\n"
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"uniform mat4 transform;\n"
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"void main()\n"
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"{\n"
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" gl_Position = transform*vPosition;\n"
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"}\n";
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const char* fshaderSource =
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//"#version 320 es\n"
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"precision mediump float;\n"
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"void main()\n"
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"{\n"
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" gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);\n"
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"}\n";
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void compile_shader(GLuint shader, const char* source)
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{
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glShaderSource(shader, 1, &source, 0);
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glCompileShader(shader);
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int err = glGetError();
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if(err)
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{
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oc_log_error("gl error: %i\n", err);
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}
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int status = 0;
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glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
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if(!status)
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{
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char buffer[256];
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int size = 0;
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glGetShaderInfoLog(shader, 256, &size, buffer);
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oc_log_error("shader error: %.*s\n", size, buffer);
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}
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}
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int child_main(int writeFd)
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{
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oc_init();
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oc_rect rect = { .x = 100, .y = 100, .w = 800, .h = 600 };
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oc_window window = oc_window_create(rect, OC_STR8("test"), 0);
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//NOTE: create surface
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oc_surface surface = oc_surface_create_remote(800, 600, OC_GLES);
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oc_surface_id connectionID = oc_surface_remote_id(surface);
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oc_surface_select(surface);
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//NOTE: init shader and gl state
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oc_surface_select(surface);
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GLuint vao;
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glGenVertexArrays(1, &vao);
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glBindVertexArray(vao);
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GLuint vertexBuffer;
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glGenBuffers(1, &vertexBuffer);
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GLfloat vertices[] = {
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-0.866 / 2, -0.5 / 2, 0, 0.866 / 2, -0.5 / 2, 0, 0, 0.5, 0
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};
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glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
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glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
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unsigned int vshader = glCreateShader(GL_VERTEX_SHADER);
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unsigned int fshader = glCreateShader(GL_FRAGMENT_SHADER);
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program = glCreateProgram();
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compile_shader(vshader, vshaderSource);
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compile_shader(fshader, fshaderSource);
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glAttachShader(program, vshader);
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glAttachShader(program, fshader);
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glLinkProgram(program);
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int status = 0;
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glGetProgramiv(program, GL_LINK_STATUS, &status);
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if(!status)
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{
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char buffer[256];
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int size = 0;
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glGetProgramInfoLog(program, 256, &size, buffer);
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oc_log_error("link error: %.*s\n", size, buffer);
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}
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glUseProgram(program);
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//NOTE: send context id to parent
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write(writeFd, &connectionID, sizeof(connectionID));
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//NOTE: render loop
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while(!oc_should_quit())
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{
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oc_pump_events(0);
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oc_event* event = 0;
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while((event = oc_next_event(oc_scratch())) != 0)
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{
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switch(event->type)
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{
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case OC_EVENT_WINDOW_CLOSE:
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{
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oc_request_quit();
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}
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break;
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default:
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break;
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}
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}
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oc_surface_select(surface);
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oc_vec2 size = oc_surface_get_size(surface);
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oc_vec2 scaling = oc_surface_contents_scaling(surface);
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glViewport(0, 0, size.x * scaling.x, size.y * scaling.y);
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glClearColor(0.3, 0.3, 1, 1);
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glClear(GL_COLOR_BUFFER_BIT);
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static float alpha = 0;
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//f32 aspect = frameSize.x/frameSize.y;
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f32 aspect = 800 / (f32)600;
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GLfloat matrix[] = { cosf(alpha) / aspect, sinf(alpha), 0, 0,
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-sinf(alpha) / aspect, cosf(alpha), 0, 0,
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0, 0, 1, 0,
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0, 0, 0, 1 };
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alpha += 2 * M_PI / 120;
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glUniformMatrix4fv(0, 1, false, matrix);
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glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
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glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, 0);
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glEnableVertexAttribArray(0);
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glDrawArrays(GL_TRIANGLES, 0, 3);
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oc_surface_present(surface);
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}
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oc_terminate();
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return (0);
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}
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int main(int argc, char** argv)
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{
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if(argc > 1)
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{
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if(!strcmp(argv[1], "--child"))
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{
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int writeFd = atoi(argv[2]);
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oc_log_info("child process created with file desc %i\n", writeFd);
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return (child_main(writeFd));
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}
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else
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{
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return (-1);
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}
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}
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// setvbuf( stdout, NULL, _IONBF, 0 );
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oc_init();
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//NOTE: create main window
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oc_rect rect = { .x = 100, .y = 100, .w = 800, .h = 600 };
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oc_window window = oc_window_create(rect, OC_STR8("test"), 0);
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//NOTE: create surface client
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oc_surface surface = oc_surface_create_host(window);
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//NOTE setup descriptors
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int fileDesc[2];
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pipe(fileDesc);
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oc_log_info("parent process created readFd %i and writeFd %i\n", fileDesc[0], fileDesc[1]);
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char writeDescStr[64];
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snprintf(writeDescStr, 64, "%i", fileDesc[1]);
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char* args[] = { "bin/example_surface_sharing", "--child", writeDescStr, 0 };
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process_id child = spawn_child(args[0], args);
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//NOTE: read the connection id
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oc_surface_id connectionID = 0;
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read(fileDesc[0], &connectionID, sizeof(connectionID));
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oc_log_info("received child connection id %llu\n", connectionID);
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//NOTE: connect the client
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oc_surface_host_connect(surface, connectionID);
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//NOTE: show the window
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oc_window_bring_to_front(window);
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while(!oc_should_quit())
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{
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oc_pump_events(0);
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oc_event* event = 0;
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while((event = oc_next_event(oc_scratch())) != 0)
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{
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switch(event->type)
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{
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case OC_EVENT_WINDOW_CLOSE:
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{
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oc_request_quit();
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}
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break;
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default:
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break;
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}
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oc_arena_clear(oc_scratch());
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}
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oc_surface_select(surface);
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oc_surface_present(surface);
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}
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terminate_child(child);
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oc_terminate();
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return (0);
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}
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