Add fifsdl

Author: ic-scm

build.sh

@@ -1,4 +1,7 @@
 #!/bin/bash
+echo "Building fif2png"
 g++ -c fif2png.cpp -O2 -Wall `libpng-config --cflags`
 g++ fif2png.o -o fif2png `libpng-config --ldflags`
 rm fif2png.o
+echo "Building fifsdl"
+g++ fifsdl.cpp -O2 -Wall -o fifsdl -lSDL2

fifsdl.cpp

@@ -0,0 +1,122 @@
+//FastIF SDL viewer
+//Copyright (C) 2020 Extrasklep
+
+#include <iostream>
+#include <fstream>
+#include <SDL2/SDL.h>
+#include "fif_decoder.h"
+
+SDL_Window* window = NULL;
+SDL_Surface* screenSurface = NULL;
+
+unsigned int XRES, YRES;
+
+void setpixelsdl(SDL_Surface *surface, int x, int y, uint32_t pixel) {
+    uint8_t *target_pixel = (uint8_t *)surface->pixels + y * surface->pitch + x * 4;
+    *(uint32_t *)target_pixel = pixel;
+}
+
+long map(long x, long in_min, long in_max, long out_min, long out_max) {
+    return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
+}
+
+uint32_t mapRGB(int r, int g, int b) {return ((r & 0xff) << 16) + ((g & 0xff) << 8) + (b & 0xff);}
+
+bool init(const char* title) {
+    //Initialize SDL
+    if(SDL_Init( SDL_INIT_VIDEO ) < 0) {
+        std::cout << "SDL init error: " << SDL_GetError();
+    }
+    else {
+        //Create window
+        window = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, XRES, YRES, SDL_WINDOW_SHOWN);
+        if(window == NULL) {
+            std::cout << "SDL window error: " << SDL_GetError();
+        }
+        else {
+            //Get window surface
+            screenSurface = SDL_GetWindowSurface(window);
+            //Update the surface
+            SDL_UpdateWindowSurface(window);
+        }
+    }
+    return 0;
+}
+
+void quit() {
+    SDL_DestroyWindow(window);
+    SDL_Quit();
+}
+
+int main(int argc, char** args) {
+    if(argc<2) {
+        std::cout << "Usage: " << args[0] << " [FIF input file]\n";
+        return 0;
+    }
+    
+    FIF* fif = new FIF;
+    std::ifstream ifile(args[1],std::ios::in|std::ios::binary|std::ios::ate);
+    if(!ifile.is_open()) {
+        perror(args[1]);
+        exit(1);
+    } else {
+        std::streampos size = ifile.tellg();
+        ifile.seekg(0);
+        fif->data = new unsigned char[size];
+        ifile.read((char*)fif->data,size);
+        ifile.close();
+    }
+    
+    //Read FIF
+    signed int res = FIF_read(fif);
+    if(res < 0) {
+        std::cout << "FIF error " << (int)res << ".\n";
+        exit(2);
+    }
+    XRES = fif->width;
+    YRES = fif->height;
+    unsigned long vbufsize = fif->width*fif->height;
+    
+    bool quitRequest=false;
+    SDL_Event sdlEvent;
+    
+    init("FIF viewer");
+    
+    while(quitRequest==0) {
+        //Handle events on queue 
+        while(SDL_PollEvent( &sdlEvent ) != 0) { 
+            //Quit request
+            if( sdlEvent.type == SDL_QUIT ) {quitRequest = true;}
+        }
+        
+        //Play FIF
+        if(!fif->eof) {
+            signed int res = FIF_read(fif);
+            if(res == 0) {
+                std::cout << "Playback done\n";
+                SDL_Delay(50);
+            } else if(res < 0) {
+                std::cout << "FIF error " << (int)res << ".\n";
+                exit(2);
+            } else if(res > 0) {
+                SDL_Delay(res);
+            }
+        } else {
+            SDL_Delay(50);
+        }
+        
+        //Write image data to SDL
+        for(unsigned long i=0;i<vbufsize;i++) {
+            ((uint32_t*)screenSurface->pixels)[i] = mapRGB(fif->decoded_data[i].r,fif->decoded_data[i].g,fif->decoded_data[i].b);
+        }
+        
+        SDL_UpdateWindowSurface( window );
+    }
+    
+    quit();
+    
+    FIF_free(fif);
+    delete fif;
+    
+    return 0;
+}