374 lines
10 KiB
C
374 lines
10 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <time.h>
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#include <stdint.h>
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#include <wayland-client.h>
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#include <wayland-util.h>
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#include <SDL3/SDL.h>
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#include <pthread.h>
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#include <sys/mman.h>
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#include "renderer.h"
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#include "shm.h"
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#include "xdg-shell-protocol.h"
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#include <EGL/egl.h>
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#include <wayland-egl.h>
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struct timespec program_start;
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void init_timer() {
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clock_gettime(CLOCK_MONOTONIC, &program_start);
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}
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double time_since_start() {
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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return (now.tv_sec - program_start.tv_sec) +
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(now.tv_nsec - program_start.tv_nsec) / 1e9;
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}
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struct client_state {
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int width, height;
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/* Globals */
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struct wl_display *wl_display;
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struct wl_registry *wl_registry;
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struct wl_shm *wl_shm;
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struct wl_compositor *wl_compositor;
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struct xdg_wm_base *xdg_wm_base;
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/* Objects */
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struct wl_surface *wl_surface;
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struct xdg_surface *xdg_surface;
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struct xdg_toplevel *xdg_toplevel;
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struct wl_egl_window *egl_window;
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EGLDisplay egl_display;
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EGLConfig egl_config;
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EGLSurface egl_surface;
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EGLContext egl_context;
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};
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static void
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wl_buffer_release(void *data, struct wl_buffer *wl_buffer)
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{
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/* Sent by the compositor when it's no longer using this buffer */
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wl_buffer_destroy(wl_buffer);
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}
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static const struct wl_buffer_listener wl_buffer_listener = {
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.release = wl_buffer_release,
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};
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static struct wl_buffer *
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draw_frame(struct client_state *state)
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{
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int stride = state->width * 4;
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int size = stride * state->height;
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int fd = allocate_shm_file(size);
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if (fd == -1) {
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return NULL;
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}
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uint32_t *data = mmap(NULL, size,
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PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (data == MAP_FAILED) {
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close(fd);
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return NULL;
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}
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struct wl_shm_pool *pool = wl_shm_create_pool(state->wl_shm, fd, size);
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struct wl_buffer *buffer = wl_shm_pool_create_buffer(pool, 0,
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state->width, state->height, stride, WL_SHM_FORMAT_XRGB8888);
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wl_shm_pool_destroy(pool);
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close(fd);
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/* Draw checkerboxed background */
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for (int y = 0; y < state->height; ++y) {
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for (int x = 0; x < state->width; ++x) {
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if ((x + y / 8 * 8) % 16 < 8)
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data[y * state->width + x] = 0xFF666666;
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else
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data[y * state->width + x] = 0xFFEEEEEE;
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}
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}
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munmap(data, size);
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wl_buffer_add_listener(buffer, &wl_buffer_listener, NULL);
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return buffer;
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}
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static void
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xdg_surface_configure(void *data,
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struct xdg_surface *xdg_surface, uint32_t serial)
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{
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struct client_state *state = data;
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xdg_surface_ack_configure(xdg_surface, serial);
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// TODO do egl stuff here instead?
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//struct wl_buffer *buffer = draw_frame(state);
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//wl_surface_attach(state->wl_surface, buffer, 0, 0);
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wl_surface_commit(state->wl_surface);
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}
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static const struct xdg_surface_listener xdg_surface_listener = {
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.configure = xdg_surface_configure,
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};
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static void
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xdg_wm_base_ping(void *data, struct xdg_wm_base *xdg_wm_base, uint32_t serial)
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{
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xdg_wm_base_pong(xdg_wm_base, serial);
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}
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static const struct xdg_wm_base_listener xdg_wm_base_listener = {
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.ping = xdg_wm_base_ping,
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};
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static void
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registry_handle_global(void *data, struct wl_registry *registry,
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uint32_t name, const char *interface, uint32_t version)
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{
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printf("interface: '%s', version: %d, name: %d\n",
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interface, version, name);
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struct client_state *state = data;
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//if (strcmp(interface, wl_shm_interface.name) == 0) {
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// state->wl_shm = wl_registry_bind(
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// registry, name, &wl_shm_interface, 1);
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//}
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if (strcmp(interface, wl_compositor_interface.name) == 0) {
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state->wl_compositor = wl_registry_bind(
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registry, name, &wl_compositor_interface, 4);
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}
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if (strcmp(interface, xdg_wm_base_interface.name) == 0) {
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state->xdg_wm_base = wl_registry_bind(
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registry, name, &xdg_wm_base_interface, 1);
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xdg_wm_base_add_listener(state->xdg_wm_base,
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&xdg_wm_base_listener, state);
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}
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}
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static void
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registry_handle_global_remove(void *data, struct wl_registry *registry,
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uint32_t name)
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{
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// This space deliberately left blank
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}
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static const struct wl_registry_listener
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wl_registry_listener = {
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.global = registry_handle_global,
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.global_remove = registry_handle_global_remove,
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};
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static void egl_init(struct client_state *state) {
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EGLint major, minor, count, n, size;
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EGLConfig *configs;
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int i;
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EGLint config_attribs[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RED_SIZE, 8,
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EGL_GREEN_SIZE, 8,
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EGL_BLUE_SIZE, 8,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
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EGL_NONE
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};
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static const EGLint context_attribs[] = {
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EGL_CONTEXT_CLIENT_VERSION, 2,
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EGL_NONE
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};
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state->egl_display = eglGetDisplay((EGLNativeDisplayType) state->wl_display);
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if (state->egl_display == EGL_NO_DISPLAY) {
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fprintf(stderr, "Can't create egl display\n");
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exit(1);
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} else {
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fprintf(stderr, "Created egl display\n");
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}
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if (eglInitialize(state->egl_display, &major, &minor) != EGL_TRUE) {
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fprintf(stderr, "Can't initialise egl display\n");
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exit(1);
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}
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printf("EGL major: %d, minor %d\n", major, minor);
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eglGetConfigs(state->egl_display, NULL, 0, &count);
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printf("EGL has %d configs\n", count);
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configs = calloc(count, sizeof *configs);
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eglChooseConfig(state->egl_display, config_attribs,
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configs, count, &n);
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for (i = 0; i < n; i++) {
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eglGetConfigAttrib(state->egl_display,
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configs[i], EGL_BUFFER_SIZE, &size);
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printf("Buffer size for config %d is %d\n", i, size);
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eglGetConfigAttrib(state->egl_display,
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configs[i], EGL_RED_SIZE, &size);
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printf("Red size for config %d is %d\n", i, size);
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// just choose the first one
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state->egl_config = configs[i];
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break;
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}
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state->egl_context =
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eglCreateContext(state->egl_display,
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state->egl_config,
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EGL_NO_CONTEXT, context_attribs);
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// EGL window
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state->egl_window = wl_egl_window_create(state->wl_surface,
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state->width, state->height);
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if (state->egl_window == EGL_NO_SURFACE) {
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fprintf(stderr, "Can't create egl window\n");
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exit(1);
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} else {
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fprintf(stderr, "Created egl window\n");
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}
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state->egl_surface =
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eglCreateWindowSurface(state->egl_display,
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state->egl_config,
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(unsigned long) state->egl_window, NULL);
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if (eglMakeCurrent(state->egl_display, state->egl_surface,
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state->egl_surface, state->egl_context)) {
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fprintf(stderr, "Made current\n");
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} else {
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fprintf(stderr, "Made current failed\n");
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}
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}
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int
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main(int argc, char *argv[])
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{
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char *shader_path = NULL;
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if (argc >= 2) {
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shader_path = argv[1];
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} else {
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printf("need to supply path to shader\n");
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exit(1);
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}
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int width = 700, height = 450;
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struct client_state state = { width, height, 0 };
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state.wl_display = wl_display_connect(NULL);
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state.wl_registry = wl_display_get_registry(state.wl_display);
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wl_registry_add_listener(state.wl_registry, &wl_registry_listener, &state);
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wl_display_roundtrip(state.wl_display);
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state.wl_surface = wl_compositor_create_surface(state.wl_compositor);
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state.xdg_surface = xdg_wm_base_get_xdg_surface(
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state.xdg_wm_base, state.wl_surface);
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xdg_surface_add_listener(state.xdg_surface, &xdg_surface_listener, &state);
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state.xdg_toplevel = xdg_surface_get_toplevel(state.xdg_surface);
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xdg_toplevel_set_title(state.xdg_toplevel, "GLONKERS!");
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wl_surface_commit(state.wl_surface);
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egl_init(&state);
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Renderer renderer = new_renderer();
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while (wl_display_dispatch(state.wl_display)) {
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double time = time_since_start();
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render(&renderer, state.width, state.height, time, shader_path, false);
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eglSwapBuffers(state.egl_display, state.egl_surface);
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}
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return 0;
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}
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//
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//_Atomic bool running = true;
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//
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//void intHandler(int dummy) {
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// printf("exiting\n");
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// running = false;
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// fclose(stdin);
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//}
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//
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//bool reload_shader = false;
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//
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///// reads stdin on a separate thread.
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//void *read_stdin(void *ptr) {
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// char buff[10];
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// while (running) {
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// fgets(buff, 10, stdin);
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// if (strcmp(buff, "r\n") == 0) {
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// printf("reloading shader\n");
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// reload_shader = true;
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// }
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// }
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// return NULL;
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//}
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//
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//int main(int argc, char *argv[]) {
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// signal(SIGINT, intHandler);
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// pthread_t stdin_thread;
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// pthread_create( &stdin_thread, NULL, read_stdin, NULL);
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//
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// init_timer();
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//
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// printf("Good Morning 🍵\n");
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// SDL_Init(SDL_INIT_VIDEO);
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// SDL_SetHint(SDL_HINT_OPENGL_ES_DRIVER, "1");
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// SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
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// SDL_GL_CONTEXT_PROFILE_ES);
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// SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
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// SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
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// SDL_Window* window = SDL_CreateWindow("SDL3 OpenGL Cube",
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// 800, 600, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
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// if (!window) {
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// printf("CreateWindow Error: %s\n", SDL_GetError());
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// SDL_Quit();
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// return 1;
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// }
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//
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// SDL_GLContext glContext = SDL_GL_CreateContext(window);
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//
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// if (!glContext) {
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// printf("GL Context Error: %s\n", SDL_GetError());
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// SDL_DestroyWindow(window);
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// SDL_Quit();
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// return 1;
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// }
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//
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// Renderer renderer = new_renderer();
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//
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// SDL_Event e;
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// int w, h;
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// while (running) {
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// while (SDL_PollEvent(&e)) {
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// if (e.type == SDL_EVENT_QUIT) running = false;
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// if (e.type == SDL_EVENT_WINDOW_RESIZED) {
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// SDL_GetWindowSize(window, &w, &h);
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// }
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// }
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//
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// char *shader_path = NULL;
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// if (argc >= 2) {
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// shader_path = argv[1];
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// } else {
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// printf("need to supply path to shader\n");
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// exit(1);
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// }
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//
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// double time = time_since_start();
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// render(&renderer, w, h, time, shader_path, reload_shader);
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// if (reload_shader) reload_shader = false;
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//
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// SDL_GL_SwapWindow(window);
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// }
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//
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// pthread_join(stdin_thread, NULL);
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//}
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//
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