primlib.c
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#include <assert.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "primlib.h"
static SDL_Renderer *renderer = NULL;
static SDL_Window *window = NULL;
// static Uint32 colors[COLOR_MAX] = {0xff000000,
// 0xff0000ff, 0xff00ff00, 0xffff0000,
// 0xffffff00, 0xffff00ff, 0xff00ffff,
// 0xffffffff};
struct RGB {
uint8_t r;
uint8_t g;
uint8_t b;
};
static struct RGB colors[COLOR_MAX] = {
{0, 0, 0}, {255, 0, 0}, {0, 255, 0}, {0, 0, 255},
{0, 255, 255}, {255, 0, 255}, {255, 255, 0}, {255, 255, 255}};
// Screen dimension constants
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
void gfx_pixel(int x, int y, enum color c) {
pixelRGBA(renderer, x, y, colors[c].r, colors[c].g, colors[c].b, 255);
}
void gfx_line(int x1, int y1, int x2, int y2, enum color c) {
assert(c < COLOR_MAX);
lineRGBA(renderer, x1, y1, x2, y2, colors[c].r, colors[c].g, colors[c].b,
255);
}
void gfx_rect(int x1, int y1, int x2, int y2, enum color c) {
assert(c < COLOR_MAX);
rectangleRGBA(renderer, x1, y1, x2, y2, colors[c].r, colors[c].g, colors[c].b,
255);
}
void gfx_filledRect(int x1, int y1, int x2, int y2, enum color c) {
assert(c < COLOR_MAX);
boxRGBA(renderer, x1, y1, x2, y2, colors[c].r, colors[c].g, colors[c].b, 255);
}
void gfx_circle(int x, int y, int r, enum color c) {
assert(c < COLOR_MAX);
circleRGBA(renderer, x, y, r, colors[c].r, colors[c].g, colors[c].b, 255);
}
void gfx_filledCircle(int x, int y, int r, enum color c) {
assert(c < COLOR_MAX);
filledCircleRGBA(renderer, x, y, r, colors[c].r, colors[c].g, colors[c].b,
255);
}
int gfx_screenWidth() { return SCREEN_WIDTH; }
int gfx_screenHeight() { return SCREEN_HEIGHT; }
void gfx_updateScreen() {
SDL_RenderPresent(renderer);
SDL_RenderClear(renderer);
}
void gfx_textout(int x, int y, const char *s, enum color c) {
assert(c < COLOR_MAX);
stringRGBA(renderer, x, y, s, colors[c].r, colors[c].g, colors[c].b, 255);
}
int gfx_pollkey() {
SDL_Event event;
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_KEYDOWN:
return event.key.keysym.sym;
case SDL_QUIT:
exit(3);
}
}
return -1;
}
int gfx_getkey() {
SDL_Event event;
while (1) {
SDL_WaitEvent(&event);
if (event.type == SDL_KEYDOWN)
break;
if (event.type == SDL_QUIT)
exit(3);
};
return event.key.keysym.sym;
}
int gfx_isKeyDown(int key) {
const Uint8 *keytable;
int numkeys;
SDL_PumpEvents();
keytable = SDL_GetKeyboardState(&numkeys);
SDL_Scancode code = SDL_GetScancodeFromKey(key);
assert(code < numkeys);
return keytable[code];
}
static void gfx_close() {
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
}
int gfx_init() {
/* Initialize SDL */
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
return 1;
}
atexit(gfx_close);
window = SDL_CreateWindow("SDL", SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH,
SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
if (window == NULL) {
printf("Window could not be created! SDL Error: %s\n", SDL_GetError());
exit(3);
} else {
// Create renderer for window
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_SOFTWARE);
if (renderer == NULL) {
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_ACCELERATED);
}
if (renderer == NULL) {
printf("Renderer could not be created! SDL Error: %s\n", SDL_GetError());
exit(3);
}
}
SDL_Delay(10);
return 0;
}