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waybad

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Rakarake 2025-12-12 23:11:54 +01:00
parent 8e43e4db7e
commit bd699f2183
3 changed files with 220 additions and 156 deletions
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4
Makefile
View file

@ -1,4 +1,4 @@
LIBS=sdl3 opengl LIBS=sdl3 opengl wayland-client
CFLAGS=-g -Wall -Wextra $(shell pkg-config --cflags $(LIBS)) CFLAGS=-g -Wall -Wextra $(shell pkg-config --cflags $(LIBS))
LDFLAGS=$(shell pkg-config --libs $(LIBS)) LDFLAGS=$(shell pkg-config --libs $(LIBS))
@ -6,4 +6,4 @@ all:
$(CC) $(CFLAGS) $(LDFLAGS) -o glonkers main.c $(CC) $(CFLAGS) $(LDFLAGS) -o glonkers main.c
run: all run: all
SDL_VIDEODRIVER="wayland,x11" ./glonkers ./glonkers

2
flake.nix
View file

@ -18,6 +18,8 @@
pkg-config pkg-config
sdl3 sdl3
libGL libGL
wayland
wayland-protocols
]; ];
installPhase = '' installPhase = ''
mkdir -p $out/bin mkdir -p $out/bin

370
main.c
View file

@ -3,166 +3,228 @@
#include <stdio.h> #include <stdio.h>
#include <time.h> #include <time.h>
#include <stdlib.h> #include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <GL/gl.h> #include <GL/gl.h>
#include <SDL3/SDL.h> #include <wayland-client.h>
#include <wayland-util.h>
//#include <SDL3/SDL.h>
void checkGlError() { //int main() {
const char *err = SDL_GetError(); // struct wl_display *display = wl_display_connect(NULL);
if (*err != 0) { // if (!display) {
printf("OpenGL error: %s", err); // fprintf(stderr, "Failed to connect to Wayland display.\n");
// return 1;
// }
// fprintf(stderr, "Connection established!\n");
//
// while (wl_display_dispatch(display) != -1) {
// }
//
// wl_display_disconnect(display);
//}
struct our_state {
// ...
struct wl_compositor *compositor;
// ...
};
static void
registry_handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version)
{
printf("interface: '%s', version: %d, name: %d\n",
interface, version, name);
struct our_state *state = data;
if (strcmp(interface, wl_compositor_interface.name) == 0) {
state->compositor = wl_registry_bind(
registry, name, &wl_compositor_interface, 4);
} }
} }
/// returns 0 if failed. static void
GLuint compile_shader(GLuint type, const char *src) { registry_handle_global_remove(void *data, struct wl_registry *registry,
GLuint id = glCreateShader(type); uint32_t name)
glShaderSource(id, 1, &src, 0); {
glCompileShader(id); // This space deliberately left blank
}
int result; static const struct wl_registry_listener
glGetShaderiv(id, GL_COMPILE_STATUS, &result); registry_listener = {
if (result == GL_FALSE) { .global = registry_handle_global,
int length; .global_remove = registry_handle_global_remove,
glGetShaderiv(id, GL_INFO_LOG_LENGTH, &result); };
char *message = alloca(length * sizeof(char));
glGetShaderInfoLog(id, length, &length, message); int
printf("failed to compile %s shader\n", type == GL_VERTEX_SHADER ? "vertex" : "fragment"); main(int argc, char *argv[])
printf("%s\n", message); {
glDeleteShader(id); struct our_state state = { 0 };
struct wl_display *display = wl_display_connect(NULL);
struct wl_registry *registry = wl_display_get_registry(display);
wl_registry_add_listener(registry, &registry_listener, &state);
wl_display_roundtrip(display);
return 0; return 0;
} }
return id; //void checkGlError() {
} // const char *err = SDL_GetError();
// if (*err != 0) {
/// returns 0 if failed. // printf("OpenGL error: %s", err);
GLuint create_shader(const char *fragment_src) { // }
GLuint program = glCreateProgram(); //}
GLuint fragment_shader = compile_shader(GL_FRAGMENT_SHADER, fragment_src); //
if (!(fragment_shader == 0)) { ///// returns 0 if failed.
glAttachShader(program, fragment_shader); //GLuint compile_shader(GLuint type, const char *src) {
glLinkProgram(program); // GLuint id = glCreateShader(type);
glValidateProgram(program); // glShaderSource(id, 1, &src, 0);
glDeleteShader(fragment_shader); // glCompileShader(id);
return program; //
} else { // int result;
return 0; // glGetShaderiv(id, GL_COMPILE_STATUS, &result);
} // if (result == GL_FALSE) {
} // int length;
// glGetShaderiv(id, GL_INFO_LOG_LENGTH, &result);
GLuint load_shader(const char *path) { // char *message = alloca(length * sizeof(char));
FILE *handle = fopen(path, "r"); // glGetShaderInfoLog(id, length, &length, message);
fseek(handle, 0L, SEEK_END); // printf("failed to compile %s shader\n", type == GL_VERTEX_SHADER ? "vertex" : "fragment");
long length = ftell(handle); // printf("%s\n", message);
fseek(handle, 0L, SEEK_SET); // glDeleteShader(id);
char *string = malloc(length * sizeof(char)); // return 0;
if (!fread(string, sizeof(char), length, handle)) { // }
printf("failed to read shader file"); //
exit(1); // return id;
} //}
fclose(handle); //
///// returns 0 if failed.
GLuint shader = create_shader(string); //GLuint create_shader(const char *fragment_src) {
// GLuint program = glCreateProgram();
if (shader == 0) { // GLuint fragment_shader = compile_shader(GL_FRAGMENT_SHADER, fragment_src);
// print file // if (!(fragment_shader == 0)) {
int line_count = 1; // glAttachShader(program, fragment_shader);
printf("%i\t", line_count); // glLinkProgram(program);
line_count++; // glValidateProgram(program);
for (int i = 0; i < length; i++) { // glDeleteShader(fragment_shader);
printf("%c", string[i]); // return program;
if (string[i] == '\n') { // } else {
printf("%i\t", line_count); // return 0;
line_count++; // }
} //}
} //
printf("\n"); //GLuint load_shader(const char *path) {
} // FILE *handle = fopen(path, "r");
// fseek(handle, 0L, SEEK_END);
free(string); // long length = ftell(handle);
return shader; // fseek(handle, 0L, SEEK_SET);
} // char *string = malloc(length * sizeof(char));
// if (!fread(string, sizeof(char), length, handle)) {
struct timespec program_start; // printf("failed to read shader file");
// exit(1);
void init_timer() { // }
clock_gettime(CLOCK_MONOTONIC, &program_start); // fclose(handle);
} //
// GLuint shader = create_shader(string);
double time_since_start() { //
struct timespec now; // if (shader == 0) {
clock_gettime(CLOCK_MONOTONIC, &now); // // print file
// int line_count = 1;
return (now.tv_sec - program_start.tv_sec) + // printf("%i\t", line_count);
(now.tv_nsec - program_start.tv_nsec) / 1e9; // line_count++;
} // for (int i = 0; i < length; i++) {
// printf("%c", string[i]);
int main() { // if (string[i] == '\n') {
init_timer(); // printf("%i\t", line_count);
// line_count++;
printf("Good Morning 🍵\n"); // }
SDL_Init(SDL_INIT_VIDEO); // }
SDL_Window* window = SDL_CreateWindow("SDL3 OpenGL Cube", // printf("\n");
800, 600, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE); // }
if (!window) { //
printf("CreateWindow Error: %s\n", SDL_GetError()); // free(string);
SDL_Quit(); // return shader;
return 1; //}
} //
//struct timespec program_start;
SDL_GLContext glContext = SDL_GL_CreateContext(window); //
if (!glContext) { //void init_timer() {
printf("GL Context Error: %s\n", SDL_GetError()); // clock_gettime(CLOCK_MONOTONIC, &program_start);
SDL_DestroyWindow(window); //}
SDL_Quit(); //
return 1; //double time_since_start() {
} // struct timespec now;
glEnable(GL_DEPTH_TEST); // clock_gettime(CLOCK_MONOTONIC, &now);
//
SDL_Event e; // return (now.tv_sec - program_start.tv_sec) +
int running = 1; // (now.tv_nsec - program_start.tv_nsec) / 1e9;
//}
GLuint shader = load_shader("fragment.glsl"); //create_shader(fragment_shader_source); //
//int main() {
int w, h; // init_timer();
double time; //
while (running) { // printf("Good Morning 🍵\n");
while (SDL_PollEvent(&e)) { // SDL_Init(SDL_INIT_VIDEO);
if (e.type == SDL_EVENT_QUIT) running = false; // SDL_Window* window = SDL_CreateWindow("SDL3 OpenGL Cube",
if (e.type == SDL_EVENT_WINDOW_RESIZED) { // 800, 600, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
SDL_GetWindowSize(window, &w, &h); // if (!window) {
} // printf("CreateWindow Error: %s\n", SDL_GetError());
} // SDL_Quit();
checkGlError(); // return 1;
// }
// Rendorrrr //
glViewport(0, 0, w, h); // SDL_GLContext glContext = SDL_GL_CreateContext(window);
// if (!glContext) {
glClearColor(0.1f, 0.1f, 0.1f, 1.0f); // Dark gray background // printf("GL Context Error: %s\n", SDL_GetError());
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // SDL_DestroyWindow(window);
// SDL_Quit();
// Shader parameters. // return 1;
glUseProgram(shader); // }
// glEnable(GL_DEPTH_TEST);
int uniform_WindowSize = glGetUniformLocation(shader, "WindowSize"); //
glUniform2f(uniform_WindowSize, w, h); // SDL_Event e;
// int running = 1;
time = time_since_start(); //
int uniform_time = glGetUniformLocation(shader, "time"); // GLuint shader = load_shader("fragment.glsl"); //create_shader(fragment_shader_source);
glUniform1f(uniform_time, (float)time); //
// int w, h;
// Draw quad. // double time;
glBegin(GL_QUADS); // while (running) {
glVertex2f(-1, 1); // while (SDL_PollEvent(&e)) {
glVertex2f(-1,-1); // if (e.type == SDL_EVENT_QUIT) running = false;
glVertex2f( 1,-1); // if (e.type == SDL_EVENT_WINDOW_RESIZED) {
glVertex2f( 1, 1); // SDL_GetWindowSize(window, &w, &h);
// }
glEnd(); // }
// checkGlError();
SDL_GL_SwapWindow(window); //
} // // Rendorrrr
// glViewport(0, 0, w, h);
checkGlError(); //
} // glClearColor(0.1f, 0.1f, 0.1f, 1.0f); // Dark gray background
// glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//
// // Shader parameters.
// glUseProgram(shader);
//
// int uniform_WindowSize = glGetUniformLocation(shader, "WindowSize");
// glUniform2f(uniform_WindowSize, w, h);
//
// time = time_since_start();
// int uniform_time = glGetUniformLocation(shader, "time");
// glUniform1f(uniform_time, (float)time);
//
// // Draw quad.
// glBegin(GL_QUADS);
// glVertex2f(-1, 1);
// glVertex2f(-1,-1);
// glVertex2f( 1,-1);
// glVertex2f( 1, 1);
//
// glEnd();
//
// SDL_GL_SwapWindow(window);
// }
//
// checkGlError();
//}
//