ob

commit a7483ca29f31bd9719e0ba0f512e2fb40ae8e5e3
Author: Léo Villeveygoux <leo.villeveygoux@etu.u-bordeaux.fr>
Date:   Fri,  9 Jun 2017 19:37:39 +0200

initial commit

Diffstat:
A
Makefile
 | 
6
++++++
A
clib.c
 | 
30
++++++++++++++++++++++++++++++
A
core.c
 | 
171
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

3 files changed, 207 insertions(+), 0 deletions(-)
diff --git a/Makefile b/Makefile
@@ -0,0 +1,6 @@
+LDLIBS ?= -lSDL2  -lSDL2_image
+CFLAGS ?= -Wall -Wextra
+
+all: test
+
+test: core.o clib.c
diff --git a/clib.c b/clib.c
@@ -0,0 +1,30 @@
+extern char pixels[256*256];
+extern char input;
+
+unsigned char x = 128, y = 128;
+
+unsigned iter;
+
+char color(int i){
+	return (char) ((i%128)*8/128)<<5 | (((i/256)*16/256)%8)<<2 | (i%256 < 128 ? 0:1) | (i/256 < 128 ? 0:2);
+}
+
+void init(){
+	for(int i = 0 ; i < 256*256 ; i++){
+		pixels[i] = color(i);
+	}
+}
+
+void loop(){
+	if(input & 2)
+		x++;
+	if(input & 1)
+		x--;
+	if(input & 4)
+		y--;
+	if(input & 8)
+		y++;
+
+	pixels[x+y*256] = color(256*256-(x+y*256));
+}
+
diff --git a/core.c b/core.c
@@ -0,0 +1,171 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+
+enum keys {
+	LEFT,
+	RIGHT,
+	UP,
+	DOWN,
+	A,
+	B,
+	RETURN,
+	ESCAPE,
+};
+
+/* api */
+extern void init();
+extern void loop();
+
+/* global data */
+char pixels[256*256];
+unsigned char input;
+
+void show_FPS(unsigned iter){
+	static unsigned oldtime;
+	static unsigned newtime;
+
+	if(iter%64 == 0){
+		oldtime = newtime;
+		newtime = SDL_GetTicks();
+		fprintf(stderr,"fps %.3f  \r", 1000.0/((newtime-oldtime)/64.0));
+	}
+}
+
+int get_events(void){
+	SDL_Event e;
+	while (SDL_PollEvent(&e)) {
+		if (e.type == SDL_QUIT
+		    || (e.type == SDL_KEYDOWN && e.key.keysym.sym == SDLK_q)) {
+			return 0;
+		}
+
+		if (e.type == SDL_KEYDOWN) {
+			switch (e.key.keysym.sym) {
+				case SDLK_LEFT:
+					input |= 1<<LEFT;
+					break;
+
+				case SDLK_RIGHT:
+					input |= 1<<RIGHT;
+					break;
+
+				case SDLK_UP:
+				        input |= 1<<UP;
+					break;
+
+				case SDLK_DOWN:
+					input |= 1<<DOWN;
+					break;
+
+				case SDLK_a:
+					input |= 1<<A;
+					break;
+
+				case SDLK_z:
+					input |= 1<<B;
+					break;
+
+				case SDLK_RETURN:
+					input |= 1<<RETURN;
+					break;
+
+				case SDLK_ESCAPE:
+					input |= 1<<ESCAPE;
+					break;
+			}
+		}
+		if (e.type == SDL_KEYUP) {
+			switch (e.key.keysym.sym) {
+				case SDLK_LEFT:
+					input &= ~(1<<LEFT);
+					break;
+
+				case SDLK_RIGHT:
+					input &= ~(1<<RIGHT);
+					break;
+
+				case SDLK_UP:
+				        input &= ~(1<<UP);
+					break;
+
+				case SDLK_DOWN:
+					input &= ~(1<<DOWN);
+					break;
+
+				case SDLK_a:
+					input &= ~(1<<A);
+					break;
+
+				case SDLK_z:
+					input &= ~(1<<B);
+					break;
+
+				case SDLK_RETURN:
+					input &= ~(1<<RETURN);
+					break;
+
+				case SDLK_ESCAPE:
+					input &= ~(1<<ESCAPE);
+					break;
+			}
+		}
+
+	}
+
+	return 1;
+}
+
+int main(){
+	// init
+	SDL_Init( SDL_INIT_EVERYTHING );
+	SDL_Window *window = SDL_CreateWindow("test", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 256, 256, 0);
+	SDL_Renderer *renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
+	SDL_Texture * texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGB332, SDL_TEXTUREACCESS_STREAMING, 256, 256);
+	
+	SDL_Rect rect = {.x=0,.y=0,.w=256,.h=256};
+	
+	init();
+
+	void *pix;
+	int pitch;
+	SDL_RenderClear(renderer);
+	SDL_LockTexture(texture, &rect, &pix, &pitch);
+	memcpy(pix, pixels, 256*256);
+	SDL_UnlockTexture(texture);
+
+
+	puts("inited");
+
+	// loop
+	unsigned iter = 0;
+	int cont = 1;
+	while(cont) {
+//		show_FPS(iter++);
+
+		cont = get_events();
+		
+		fprintf(stderr,"input %3u \r", (unsigned) input);
+
+		loop();
+
+		SDL_LockTexture(texture, &rect, &pix, &pitch);
+		memcpy(pix, pixels, 256*256);
+		SDL_UnlockTexture(texture);
+
+		SDL_RenderCopy(renderer, texture, &rect, &rect);
+		SDL_RenderPresent(renderer);
+		SDL_RenderClear(renderer);
+	}
+
+	// finish
+	puts("\nfinish");
+
+	SDL_DestroyTexture(texture);
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+	SDL_Quit();
+
+	return 0;
+}