/
key_presses.cpp
200 lines (156 loc) · 3.93 KB
/
key_presses.cpp
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#include "iostream"
#include "SDL/SDL.h"
#include "SDL/SDL_image.h"
#include "SDL/SDL_ttf.h"
#include <string>
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int SCREEN_BPP = 32;
SDL_Surface *background = NULL;
SDL_Surface *screen = NULL;
SDL_Surface *message = NULL;
SDL_Surface *upMessage = NULL;
SDL_Surface *downMessage = NULL;
SDL_Surface *leftMessage = NULL;
SDL_Surface *rightMessage = NULL;
SDL_Event event;
TTF_Font *font = NULL;
SDL_Color textColor = {255, 255, 255};
SDL_Surface *load_image(std::string filename)
{
//Temporary storage for the image that's loaded
SDL_Surface *loadedImage = NULL;
//Optimized image that will be used
SDL_Surface *optimizedImage = NULL;
//Load the image
loadedImage = IMG_Load(filename.c_str());
//If nothing went wrong in loading the image
if(loadedImage != NULL)
{
//Create an optimized image
optimizedImage = SDL_DisplayFormat(loadedImage);
//Free the old image
SDL_FreeSurface(loadedImage);
}
//If the image was optimized without error
if(optimizedImage != NULL)
{
//Map the color key
Uint32 colorkey = SDL_MapRGB(optimizedImage->format, 0, 0xFF, 0xFF);
//Set all pixels of color R 0, G 0xFF, B 0xFF to be transparent
SDL_SetColorKey(optimizedImage, SDL_SRCCOLORKEY, colorkey);
}
//Return the optimized image
return optimizedImage;
}
void apply_surface(int x, int y, SDL_Surface *source, SDL_Surface *destination, SDL_Rect *clip = NULL)
{
//Make a temporary rectangle to hold the offsets
SDL_Rect offset;
//Give the offsets to the rectangle
offset.x = x;
offset.y = y;
//Blit the surface
SDL_BlitSurface(source, clip, destination, &offset);
}
bool init()
{
//Init SDL subsystems
if(SDL_Init(SDL_INIT_EVERYTHING) == -1)
{
return false;
}
//Set up screen
screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE);
//If there was an error setting up the screen
if(screen == NULL)
{
return false;
}
if(TTF_Init() == -1)
{
return false;
}
SDL_WM_SetCaption("TTF Test", NULL);
return true;
}
bool load_files()
{
//Load image
background = load_image("background.png");
//Open the font
font = TTF_OpenFont("lazy.ttf", 28);
//If there was an error loading the images
if(background == NULL)
{
return false;
}
if(font == NULL)
{
return false;
}
return true;
}
void clean_up()
{
//Free the images
SDL_FreeSurface(background);
SDL_FreeSurface(message);
TTF_CloseFont(font);
TTF_Quit();
//Quit SDL
SDL_Quit();
}
int main(int argc, char* args[])
{
bool quit = false;
if(init() == false)
{
return 1;
}
//Load the files
if(load_files() == false)
{
return 1;
}
//ADD ERROR CHECKING FOR THIS STUFF!!!!
message = TTF_RenderText_Solid(font, "Message will go here.", textColor);
upMessage = TTF_RenderText_Solid(font, "Up was pressed.", textColor);
downMessage = TTF_RenderText_Solid(font, "Down was pressed.", textColor);
leftMessage = TTF_RenderText_Solid(font, "Left was pressed.", textColor);
rightMessage = TTF_RenderText_Solid(font, "Right was pressed.", textColor);
//While user hasn't quit
while(quit == false)
{
while(SDL_PollEvent(&event))
{
if(event.type == SDL_KEYDOWN)
{
switch(event.key.keysym.sym)
{
case SDLK_UP: message = upMessage; break;
case SDLK_DOWN: message = downMessage; break;
case SDLK_LEFT: message = leftMessage; break;
case SDLK_RIGHT: message = rightMessage; break;
}
}
else if(event.type == SDL_QUIT)
{
quit = true;
}
}
if(message != NULL)
{
apply_surface(0, 0, background, screen);
apply_surface((SCREEN_WIDTH - message->w) / 2, (SCREEN_HEIGHT - message->h) / 2, message, screen);
message = NULL;
}
if(SDL_Flip(screen) == -1)
{
return 1;
}
//Free the surface and quit
}
clean_up();
return 0;
}