now
This commit is contained in:
edwin
169
src/main.c
169
src/main.c
@@ -7,93 +7,118 @@
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#ifndef MAIN_MESSAGE
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#define MAIN_MESSAGE "Hello from main!"
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#endif
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#include <stdio.h>
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#include <stdbool.h>
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// Functie voor de scherminitialisatie
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void lvgl_init(SDL_Window **window, SDL_Renderer **renderer, int width, int height) {
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// SDL2 initialisatie
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if (SDL_Init(SDL_INIT_VIDEO) != 0) {
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printf("SDL init failed: %s\n", SDL_GetError());
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exit(1);
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}
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*window = SDL_CreateWindow("LVGL with SDL2", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, width, height, SDL_WINDOW_OPENGL);
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if (*window == NULL) {
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printf("Failed to create window: %s\n", SDL_GetError());
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exit(1);
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}
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*renderer = SDL_CreateRenderer(*window, -1, SDL_RENDERER_ACCELERATED);
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if (*renderer == NULL) {
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printf("Failed to create renderer: %s\n", SDL_GetError());
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exit(1);
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#include <SDL.h>
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// Define MAX and MIN macros
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#define MAX(X, Y) (((X) > (Y)) ? (X) : (Y))
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#define MIN(X, Y) (((X) < (Y)) ? (X) : (Y))
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// Define screen dimensions
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#define SCREEN_WIDTH 800
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#define SCREEN_HEIGHT 600
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int main(int argc, char* argv[])
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{
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// Unused argc, argv
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(void) argc;
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(void) argv;
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// Initialize SDL
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if(SDL_Init(SDL_INIT_VIDEO) < 0)
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{
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printf("SDL could not be initialized!\n"
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"SDL_Error: %s\n", SDL_GetError());
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return 0;
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}
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// Initialisatie LVGL
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lv_init();
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#if defined linux && SDL_VERSION_ATLEAST(2, 0, 8)
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// Disable compositor bypass
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if(!SDL_SetHint(SDL_HINT_VIDEO_X11_NET_WM_BYPASS_COMPOSITOR, "0"))
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{
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printf("SDL can not disable compositor bypass!\n");
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return 0;
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}
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#endif
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// Koppelen van SDL2 als de display buffer
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lv_disp_draw_buf_t draw_buf;
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static lv_color_t buf1[LV_HOR_RES_MAX * 10];
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lv_disp_draw_buf_init(&draw_buf, buf1, NULL, LV_HOR_RES_MAX * 10);
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lv_disp_drv_t disp_drv;
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lv_disp_drv_init(&disp_drv);
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disp_drv.draw_buf = &draw_buf;
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disp_drv.flush_cb = sdl_flush;
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disp_drv.hor_res = width;
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disp_drv.ver_res = height;
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lv_disp_drv_register(&disp_drv);
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}
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// Functie voor het tekenen naar het SDL-scherm
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void sdl_flush(lv_disp_drv_t *disp, const lv_area_t *area, lv_color_t *color_p) {
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SDL_Renderer *renderer = (SDL_Renderer*) disp->user_data;
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// Zet het gebied waar we gaan tekenen
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SDL_Rect rect = {area->x1, area->y1, area->x2 - area->x1 + 1, area->y2 - area->y1 + 1};
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for (int y = 0; y <= rect.h; y++) {
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for (int x = 0; x <= rect.w; x++) {
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lv_color_t color = color_p[(y * rect.w) + x];
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SDL_SetRenderDrawColor(renderer, color.ch.red, color.ch.green, color.ch.blue, 255);
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SDL_RenderDrawPoint(renderer, rect.x + x, rect.y + y);
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// Create window
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SDL_Window *window = SDL_CreateWindow("Basic C SDL project",
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SDL_WINDOWPOS_UNDEFINED,
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SDL_WINDOWPOS_UNDEFINED,
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SCREEN_WIDTH, SCREEN_HEIGHT,
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SDL_WINDOW_SHOWN);
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if(!window)
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{
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printf("Window could not be created!\n"
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"SDL_Error: %s\n", SDL_GetError());
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}
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else
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{
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// Create renderer
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SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
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if(!renderer)
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{
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printf("Renderer could not be created!\n"
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"SDL_Error: %s\n", SDL_GetError());
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}
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}
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SDL_RenderPresent(renderer);
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else
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{
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// Declare rect of square
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SDL_Rect squareRect;
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lv_disp_flush_ready(disp);
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}
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// Square dimensions: Half of the min(SCREEN_WIDTH, SCREEN_HEIGHT)
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squareRect.w = MIN(SCREEN_WIDTH, SCREEN_HEIGHT) / 2;
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squareRect.h = MIN(SCREEN_WIDTH, SCREEN_HEIGHT) / 2;
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// Hoofdfunctie
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int main(void) {
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SDL_Window *window;
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SDL_Renderer *renderer;
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int width = 800;
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int height = 480;
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// Square position: In the middle of the screen
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squareRect.x = SCREEN_WIDTH / 2 - squareRect.w / 2;
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squareRect.y = SCREEN_HEIGHT / 2 - squareRect.h / 2;
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lvgl_init(&window, &renderer, width, height);
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// Maak een eenvoudige knop aan
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lv_obj_t *btn = lv_btn_create(lv_scr_act(), NULL);
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lv_obj_align(btn, NULL, LV_ALIGN_CENTER, 0, 0);
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lv_obj_t *label = lv_label_create(btn, NULL);
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lv_label_set_text(label, "Klik hier!");
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// Event loop exit flag
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bool quit = false;
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// Event loop
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SDL_Event e;
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int quit = 0;
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while (!quit) {
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while (SDL_PollEvent(&e)) {
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if (e.type == SDL_QUIT) {
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quit = 1;
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// Event loop
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while(!quit)
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{
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SDL_Event e;
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// Wait indefinitely for the next available event
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SDL_WaitEvent(&e);
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// User requests quit
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if(e.type == SDL_QUIT)
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{
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quit = true;
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}
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// Initialize renderer color white for the background
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SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xFF, 0xFF);
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// Clear screen
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SDL_RenderClear(renderer);
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// Set renderer color red to draw the square
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SDL_SetRenderDrawColor(renderer, 0xFF, 0x00, 0x00, 0xFF);
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// Draw filled square
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SDL_RenderFillRect(renderer, &squareRect);
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// Update screen
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SDL_RenderPresent(renderer);
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}
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// Destroy renderer
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SDL_DestroyRenderer(renderer);
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}
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// LVGL taakverwerking
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lv_task_handler();
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SDL_Delay(5);
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// Destroy window
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SDL_DestroyWindow(window);
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}
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// Opruimen en afsluiten
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SDL_DestroyRenderer(renderer);
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SDL_DestroyWindow(window);
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// Quit SDL
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SDL_Quit();
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return 0;
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