x11
This commit is contained in:
parent
f56f28c721
commit
3d3a54a975
5 changed files with 286 additions and 136 deletions
2
Makefile
2
Makefile
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@ -6,7 +6,7 @@ CCFLAGS = -std=c99 -Wall -Wextra -pedantic -O2
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CCFLAGS += $(INCFLAGS)
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LDFLAGS += $(INCFLAGS)
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LDFLAGS += -lSDL2
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LDFLAGS += -lX11
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LDFLAGS += -lm
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BIN = bin
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13
src/main.c
13
src/main.c
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@ -1,20 +1,21 @@
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#include "renderer.h"
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#include "screen.h"
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#include <stdio.h>
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#include <stdlib.h>
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int main (void) {
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Screen screen;
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init_screen(&screen, "test", 1920, 1080);
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init_screen(&screen, 2160, 1440);
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Camera camera;
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init_camera(&camera);
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while(screen.open) {
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poll_screen(&screen);
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draw_screen(&screen);
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while (poll_screen(&screen)) {
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render(&screen, &camera);
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update_camera(&camera, &screen);
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}
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free_screen(&screen);
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return EXIT_SUCCESS;
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@ -19,16 +19,16 @@ static double fov = PI / 4;
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#define FOV_CHANGE_SPEED 1
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#define PLAYER_SIZE .1
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void update_camera(Camera* camera, Screen* screen) {
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double rotate = 0;
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if (key_pressed(screen, SDL_SCANCODE_LEFT))
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if (key_down(KEY_LEFT))
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rotate -= ROTATE_SPEED;
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if (key_pressed(screen, SDL_SCANCODE_RIGHT))
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if (key_down(KEY_RIGHT))
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rotate += ROTATE_SPEED;
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rotate *= screen->delta;
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rotate += camera->angle;
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while (rotate >= PI2) rotate -= PI2;
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@ -39,31 +39,31 @@ void update_camera(Camera* camera, Screen* screen) {
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v2 left = { forward.y, -forward.x };
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v2 move = { 0, 0 };
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if (key_pressed(screen, SDL_SCANCODE_W)) {
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if (key_down(KEY_W)) {
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move.x += forward.x;
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move.y += forward.y;
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}
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if (key_pressed(screen, SDL_SCANCODE_S)) {
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if (key_down(KEY_S)) {
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move.x -= forward.x;
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move.y -= forward.y;
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}
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if (key_pressed(screen, SDL_SCANCODE_A)) {
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if (key_down(KEY_A)) {
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move.x += left.x;
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move.y += left.y;
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}
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if (key_pressed(screen, SDL_SCANCODE_D)) {
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if (key_down(KEY_D)) {
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move.x -= left.x;
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move.y -= left.y;
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}
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if (key_pressed(screen, SDL_SCANCODE_EQUALS)) {
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if (key_down(KEY_EQUALS)) {
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fov += FOV_CHANGE_SPEED * screen->delta;
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}
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if (key_pressed(screen, SDL_SCANCODE_MINUS)) {
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if (key_down(KEY_MINUS)) {
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fov -= FOV_CHANGE_SPEED * screen->delta;
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}
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@ -94,6 +94,7 @@ void render(Screen* screen, const Camera* camera) {
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};
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for (int x = 0; x < screen->width; x++) {
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const float xcam = (2 * (x / (float) (screen->width))) - 1;
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const float change = fov * atan(xcam);
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const float theta = camera->angle + change;
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@ -109,20 +110,31 @@ void render(Screen* screen, const Camera* camera) {
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uint32_t color;
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switch (hit) {
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case 1: color = 0xFF0000FF; break;
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case 2: color = 0x00FF00FF; break;
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case 3: color = 0x0000FFFF; break;
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case 4: color = 0xFF00FFFF; break;
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case 5: color = 0x00FFFFFF; break;
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default: color = 0x000000FF; break;
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case 2: color = 0xFF00FF00; break;
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case 3: color = 0xFFFF0000; break;
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case 4: color = 0xFFFF00FF; break;
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case 5: color = 0xFFFFFF00; break;
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default: color = 0xFF000000; break;
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}
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// switch (hit) {
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// case 1: color = 0xFF0000FF; break;
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// case 2: color = 0x00FF00FF; break;
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// case 3: color = 0x0000FFFF; break;
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// case 4: color = 0xFF00FFFF; break;
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// case 5: color = 0x00FFFFFF; break;
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// default: color = 0x000000FF; break;
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// }
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const int
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h = (int) (screen->height / len),
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y0 = max((screen->height / 2) - (h / 2), 0),
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y1 = min((screen->height / 2) + (h / 2), screen->height - 1);
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verline(screen, x, 0, y0, 0x202020FF);
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verline(screen, x, 0, y0, 0xFF202020);
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verline(screen, x, y0, y1, color);
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verline(screen, x, y1, screen->height - 1, 0x505050FF);
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verline(screen, x, y1, screen->height - 1, 0xFF505050);
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// verline(screen, x, 0, y0, 0x202020FF);
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// verline(screen, x, y0, y1, color);
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// verline(screen, x, y1, screen->height - 1, 0x505050FF);
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}
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}
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329
src/screen.c
329
src/screen.c
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@ -1,130 +1,257 @@
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#include "screen.h"
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#include <X11/X.h>
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#undef Screen
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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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#include <string.h>
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#include <time.h>
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#include <sys/select.h>
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#define XLIB_ILLEGAL_ACCESS
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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static Display* dpy;
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static int scr;
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static Window root;
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static int count = 0;
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static size_t bit_depth = sizeof(uint32_t) * 8;
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static int key_count;
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static bool* key_state;
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static bool* key_checked;
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typedef struct {
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Window window;
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GC graphics_ctx;
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Pixmap pixel_map;
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XImage* image;
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int width, height;
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} WindowState;
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static void init_x() {
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if ((dpy = XOpenDisplay(NULL)) == NULL) {
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printf("error: failed to open x11 display\n");
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exit(EXIT_FAILURE);
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}
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#ifdef DEBUG
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XSynchronize(dpy, True);
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#endif
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scr = DefaultScreen(dpy);
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root = RootWindow(dpy, scr);
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key_count = dpy->max_keycode - dpy->min_keycode;
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key_state = malloc(sizeof(bool) * key_count);
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key_checked = malloc(sizeof(bool) * key_count);
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}
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static Window create_window(int x, int y, int w, int h, int d) {
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XVisualInfo vis_info;
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if(!XMatchVisualInfo(dpy, scr, d, TrueColor, &vis_info)) {
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printf("error: %d depth not supported\n", d);
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exit(EXIT_FAILURE);
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}
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Visual* visual = vis_info.visual;;
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XSetWindowAttributes xwa;
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xwa.background_pixel = 0;
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xwa.border_pixel = 0;
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xwa.event_mask = KeyPressMask | KeyReleaseMask | StructureNotifyMask;
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xwa.colormap = XCreateColormap(dpy, root, visual, AllocNone);
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long wm = CWBackPixel | CWColormap | CWBorderPixel | CWEventMask;
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Window window = XCreateWindow(dpy, root, x, y, w, h, 0, d, InputOutput, visual, wm, &xwa);
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return window;
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}
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static XImage* create_image(int width, int height) {
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return XCreateImage(
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dpy,
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CopyFromParent,
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bit_depth,
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ZPixmap,
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0,
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malloc(width * height * bit_depth / 8),
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width,
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height,
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bit_depth,
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0
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);
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}
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void init_screen(struct Screen* screen, uint16_t width, uint16_t height) {
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if (dpy == NULL) {
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init_x();
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}
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void init_screen(Screen* screen, const char* title, uint16_t width, uint16_t height) {
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screen->width = width;
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screen->height = height;
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size_t pixel_count = screen->width * screen->height;
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screen->pixels = malloc(pixel_count * sizeof(uint32_t));
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memset(screen->pixels, 0, pixel_count * sizeof(uint32_t));
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SDL_Init(SDL_INIT_VIDEO);
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screen->window =
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SDL_CreateWindow(
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title,
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SDL_WINDOWPOS_CENTERED_DISPLAY(0),
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SDL_WINDOWPOS_CENTERED_DISPLAY(0),
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screen->width,
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screen->height,
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0
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);
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if (!screen->window) {
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printf("fatal: failed to create sdl window\n");
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exit(EXIT_FAILURE);
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}
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screen->renderer =
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SDL_CreateRenderer(
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screen->window,
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-1,
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SDL_RENDERER_ACCELERATED
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| SDL_RENDERER_PRESENTVSYNC
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);
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if (!screen->renderer) {
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printf("fatal: failed to create sdl renderer\n");
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exit(EXIT_FAILURE);
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}
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screen->texture =
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SDL_CreateTexture(
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screen->renderer,
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SDL_PIXELFORMAT_RGBA8888,
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SDL_TEXTUREACCESS_STREAMING,
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screen->width,
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screen->height
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);
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if (!screen->texture) {
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printf("fatal: failed to create window texture\n");
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exit(EXIT_FAILURE);
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}
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screen->open = true;
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screen->delta = 0;
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size_t pixel_count = screen->width * screen->height;
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screen->pixels = malloc(pixel_count * bit_depth / 8);
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memset(screen->pixels, 0, pixel_count * bit_depth / 8);
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Window window = create_window(0, 0, width, height, bit_depth);
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XMapWindow(dpy, window);
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Pixmap pixel_map = XCreatePixmap(dpy, window, width, height, bit_depth);
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GC gc = XCreateGC(dpy, pixel_map, 0, NULL);
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WindowState* state = malloc(sizeof(WindowState));
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state->window = window;
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state->graphics_ctx = gc;
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state->pixel_map = pixel_map;
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XWindowAttributes xwa;
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XGetWindowAttributes(dpy, window, &xwa);
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state->width = xwa.width;
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state->height = xwa.height;
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screen->internal = state;
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XImage* image = create_image(state->width, state->height);
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state->image = image;
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count++;
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}
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static long get_time() {
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struct timespec spec;
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clock_gettime(CLOCK_MONOTONIC, &spec);
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return round(spec.tv_nsec / 1.0e6) + spec.tv_sec * 1000;
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}
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static long last = 0;
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void poll_screen(Screen* screen) {
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struct timespec spec;
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clock_gettime(CLOCK_MONOTONIC, &spec);
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long now = round(spec.tv_nsec / 1.0e6) + spec.tv_sec * 1000;
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static void update_delta(struct Screen* screen) {
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long now = get_time();
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if (last == 0) {
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screen->delta = 0;
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} else {
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screen->delta = (now - last) / 1000.0;
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}
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last = now;
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}
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static void draw_screen(struct Screen* screen) {
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WindowState* state = (WindowState*) screen->internal;
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uint32_t* src = screen->pixels;
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uint32_t* dst = (uint32_t*) state->image->data;
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float x_step = screen->width / (float) state->width;
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float y_step = screen->height / (float) state->height;
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for (int x = 0; x < state->width; x++) {
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int px = (int) (x * x_step);
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for (int y = 0; y < state->height; y++) {
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int py = (int) (y * y_step);
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dst[x + y * state->width] = src[px + py * screen->width];
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}
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}
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XPutImage(
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dpy,
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state->window,
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state->graphics_ctx,
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state->image,
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0, 0, 0, 0,
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state->width,
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state->height
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);
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}
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static void handle_event(WindowState* state) {
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XEvent event;
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XNextEvent(dpy, &event);
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SDL_Event ev;
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while (SDL_PollEvent(&ev)) {
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switch (ev.type) {
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case SDL_QUIT:
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screen->open = false;
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break;
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default:
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break;
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switch(event.type) {
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case KeyPress: {
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XKeyEvent xkpe = event.xkey;
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uint32_t code = xkpe.keycode - dpy->min_keycode;
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key_state[code] = true;
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key_checked[code] = false;
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break;
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}
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}
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screen->key_state = SDL_GetKeyboardState(NULL);
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}
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void draw_screen(Screen* screen) {
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void *px;
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int pitch;
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SDL_LockTexture(screen->texture, NULL, &px, &pitch);
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{
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for (uint16_t y = 0; y < screen->height; y++) {
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memcpy(
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&((uint8_t*) px)[y * pitch],
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&screen->pixels[y * screen->width],
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screen->width * sizeof(uint32_t)
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);
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case KeyRelease: {
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XKeyEvent xkre = event.xkey;
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uint32_t code = xkre.keycode - dpy->min_keycode;
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key_state[code] = false;
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break;
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}
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case ConfigureNotify: {
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XConfigureEvent xce = event.xconfigure;
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state->width = xce.width;
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state->height = xce.height;
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XDestroyImage(state->image);
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state->image = create_image(state->width, state->height);
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break;
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}
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default: break;
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}
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SDL_UnlockTexture(screen->texture);
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SDL_SetRenderTarget(screen->renderer, NULL);
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SDL_SetRenderDrawColor(screen->renderer, 0, 0, 0, 0xFF);
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SDL_SetRenderDrawBlendMode(screen->renderer, SDL_BLENDMODE_NONE);
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SDL_RenderClear(screen->renderer);
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SDL_RenderCopyEx(
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screen->renderer,
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screen->texture,
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NULL,
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NULL,
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0.0,
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NULL,
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SDL_FLIP_VERTICAL);
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SDL_RenderCopy(screen->renderer, NULL, NULL, &((SDL_Rect) { 0, 0, 512, 512 }));
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SDL_RenderPresent(screen->renderer);
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}
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void free_screen(Screen* screen) {
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SDL_DestroyTexture(screen->texture);
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SDL_DestroyRenderer(screen->renderer);
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SDL_DestroyWindow(screen->window);
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bool poll_screen(struct Screen* screen) {
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draw_screen(screen);
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WindowState* state = (WindowState*) screen->internal;
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while (XPending(dpy))
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handle_event(state);
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update_delta(screen);
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return true;
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}
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bool key_pressed(Screen* screen, SDL_Scancode code) {
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return screen->key_state[code & 0xFFFF];
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void free_screen(struct Screen* screen) {
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WindowState* state = (WindowState*) screen->internal;
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XUnmapWindow(dpy, state->window);
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XFreePixmap(dpy, state->pixel_map);
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XDestroyImage(state->image);
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XFreeGC(dpy, state->graphics_ctx);
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XDestroyWindow(dpy, state->window);
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free(screen->internal);
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count--;
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if(count == 0) {
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XCloseDisplay(dpy);
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free(key_state);
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free(key_checked);
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}
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}
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bool key_pressed(int keycode) {
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if (key_checked[keycode]) return false;
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if (!key_state[keycode]) return false;
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key_checked[keycode] = true;
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return true;
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}
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bool key_down(int keycode) {
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return key_state[keycode];
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}
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34
src/screen.h
34
src/screen.h
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@ -1,24 +1,34 @@
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|||
#pragma once
|
||||
|
||||
#define _POSIX_C_SOURCE 200809L
|
||||
#include <SDL2/SDL.h>
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
|
||||
typedef struct {
|
||||
struct Screen {
|
||||
uint16_t width;
|
||||
uint16_t height;
|
||||
SDL_Window* window;
|
||||
SDL_Renderer* renderer;
|
||||
SDL_Texture* texture;
|
||||
uint32_t* pixels;
|
||||
const uint8_t* key_state;
|
||||
bool open;
|
||||
float delta;
|
||||
} Screen;
|
||||
void* internal;
|
||||
};
|
||||
|
||||
void init_screen(Screen* screen, const char* title, uint16_t width, uint16_t height);
|
||||
void draw_screen(Screen* screen);
|
||||
void poll_screen(Screen* screen);
|
||||
#define Screen struct Screen
|
||||
|
||||
#define KEY_W 17
|
||||
#define KEY_A 30
|
||||
#define KEY_S 31
|
||||
#define KEY_D 32
|
||||
#define KEY_UP 103
|
||||
#define KEY_DOWN 108
|
||||
#define KEY_LEFT 105
|
||||
#define KEY_RIGHT 106
|
||||
#define KEY_MINUS 12
|
||||
#define KEY_EQUALS 13
|
||||
#define KEY_ESC 1
|
||||
|
||||
void init_screen(Screen* screen, uint16_t width, uint16_t height);
|
||||
bool poll_screen(Screen* screen);
|
||||
void free_screen(Screen* screen);
|
||||
|
||||
bool key_pressed(Screen* screen, SDL_Scancode code);
|
||||
bool key_pressed(int keycode);
|
||||
bool key_down(int keycode);
|
||||
|
|
|
|||
Loading…
Reference in a new issue