display.c

#include "display.h"
#include "one_armed_bandit.h"

// the following global variables are defined for graphical objects only:
// the images size is 104x128 pixels


SDL_Window* init_display(){
	int one_arm_width, one_arm_height;
	SDL_Window *window;

	// -------------------------
  	// Graphic initialization
	// -------------------------
	assert(SDL_Init(SDL_INIT_VIDEO) == 0);
	get_image_file_size("./one_armed_bandit.png", &one_arm_width, &one_arm_height);
	assert((window = SDL_CreateWindow("one_armed_bandit", SDL_WINDOWPOS_UNDEFINED,
	                          SDL_WINDOWPOS_UNDEFINED, one_arm_width,
	                          one_arm_height, SDL_WINDOW_OPENGL))!=NULL);
	assert((renderer = SDL_CreateRenderer(window, -1, 0))!=NULL);
	SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);   // allow transparent mode!
	assert((one_arm_texture=create_texture_from_image_file(renderer, "one_armed_bandit.png",
	                                                       &one_arm_rect))!=NULL);
	assert((coin_texture=create_texture_from_image_file(renderer, "coin.png",
	                                                    &coin_rect))!=NULL);
	// create the global texture containing all objects:
	assert((objects_texture=create_texture_from_image_file(renderer, "objects.png",
			                                                   &object_rect))!=NULL);
  	object_height=object_rect.h/9;

	return window;
}

display_wheel(int pixel,int offset){
    // -------------------------
	// example of board display:
	// -------------------------
	SDL_Rect src_rect, dst_rect=object_rect;
	dst_rect.h=object_height*1.5;			// display 1.5 object on screen for a wheel
	src_rect=dst_rect;
	src_rect.x=0;

	// src_rect.y is positionned here on the 2nd object of objects.png
    //85 + index*104  + 1
	src_rect.y=object_height*offset;
	dst_rect.x= pixel;
	dst_rect.y=410-object_height/2;     // setup the coord. of the icon in the global renderer
	SDL_RenderCopy(renderer, objects_texture, &src_rect, &dst_rect);
}



void *display_func(void *param){
	printf("\ndisplay_func");
	machine mas = *((machine *) param); 

	while(1){

		SDL_RenderCopy(renderer, one_arm_texture, NULL, &one_arm_rect);

		SDL_Rect coin_rect_pos={700, 1020, coin_rect.w, coin_rect.h};
		SDL_RenderCopy(renderer, coin_texture, NULL, &coin_rect_pos);
		for (int i=0; i<4; i++){
			SDL_Rect coin_rect_pos={700, 400-10*i, coin_rect.w, coin_rect.h};
			SDL_RenderCopy(renderer, coin_texture, NULL, &coin_rect_pos);
		}

		for(int i=0; i<3; i++){
			display_wheel(85+104*i + 1,mas.wheels[i].current_px);
		}