basics of the cutscene engine are fleshed out, working intro sequence

Scene.c

@@ -0,0 +1,125 @@
+#include <stdio.h>
+
+#include <SDL/SDL.h>
+#include <SDL/SDL_image.h>
+#include <SDL/SDL_ttf.h>
+#include <SDL/SDL_mixer.h>
+
+#include "Scene.h"
+#include "Timer.h"
+#include "Engine.h"
+
+typedef struct kaos Kaos;
+typedef struct textBox TextBox;
+typedef struct room Room;
+typedef struct player Player;
+#include "extern.h"
+
+SLayer* newSLayer(char* filename, int x, int y, int h, int v)
+{
+  SLayer* self = malloc(sizeof(SLayer));
+
+  self->sprite = loadImage(filename);
+  self->x = x;
+  self->y = y;
+  self->h = h;
+  self->v = v;
+
+  self->oX = x;
+  self->oY = y;
+
+  return self;
+}
+
+void deleteSLayer(SLayer* target)
+{
+  SDL_FreeSurface(target->sprite);
+  free(target);
+}
+
+Scene* newScene(int in, int out, int time, SDL_Color incolor, SDL_Color outcolor)
+{
+  Scene* self = malloc(sizeof(Scene));
+
+  self->sprites = NULL;
+  self->time = time;
+  self->nSprites = 0;
+  self->fade = (Transition){in, incolor, out, outcolor};
+
+  return self;
+}
+
+void buildScene(Scene* self, SLayer* sprite)
+{
+  int i;
+  SLayer** temp;
+  if (self->nSprites)
+    temp = self->sprites;
+  self->sprites = malloc((self->nSprites+1)*sizeof(SLayer));
+  if (self->nSprites)
+  {
+    for (i = 0; i < self->nSprites; i++)
+      self->sprites[i] = temp[i];
+  }
+  self->sprites[self->nSprites++] = sprite;
+}
+
+void playScene(Scene* self)
+{
+  int i, j;
+  int alphamod;
+  Uint32 icolor, ocolor;
+  SDL_Surface* fadeIn, *fadeOut;
+
+  fadeIn = loadImage("assets/img/backgrounds/blueroom.png");
+  fadeOut = fadeIn;
+
+  icolor = SDL_MapRGB(fadeIn->format, self->fade.incolor.r, self->fade.incolor.g, self->fade.incolor.b);
+  ocolor = SDL_MapRGB(fadeIn->format, self->fade.outcolor.r, self->fade.outcolor.g, self->fade.outcolor.b);
+
+  SDL_FillRect(fadeIn, NULL, icolor);
+  SDL_FillRect(fadeOut, NULL, ocolor);
+
+
+  for (i = 0; i < self->time; i++)
+  {
+    timeStart(fps);
+    for (j = 0; j < self->nSprites; j++)
+    {
+      applySurface(self->sprites[j]->x, self->sprites[j]->y, self->sprites[j]->sprite, screen, NULL);
+      self->sprites[j]->x += self->sprites[j]->h;
+      self->sprites[j]->y += self->sprites[j]->v;
+    }
+    if (i < self->fade.in)
+    {
+      alphamod = 255 - (int)(255*((float)i/self->fade.in));
+      SDL_SetAlpha(fadeIn, SDL_SRCALPHA|SDL_RLEACCEL, alphamod);
+      applySurface(0,0, fadeIn, screen, NULL);
+    }
+    if (self->time - i < self->fade.out)
+    {
+      alphamod =  255 - (int)(255*((float)(self->time - i)/self->fade.out));
+      SDL_SetAlpha(fadeOut, SDL_SRCALPHA|SDL_RLEACCEL, alphamod);
+      applySurface(0,0, fadeOut, screen, NULL);
+    }
+    SDL_Flip(screen);
+    timeDilation();
+  }
+  for (j = 0; j < self->nSprites; j++)
+  {
+    self->sprites[j]->x = self->sprites[j]->oX;
+    self->sprites[j]->y = self->sprites[j]->oY;
+  }
+}
+
+void deleteScene(Scene* target)
+{
+  int i;
+  for (i = 0; i < target->nSprites; i++)
+  {
+    SDL_FreeSurface(target->sprites[i]->sprite);
+    free(target->sprites[i]);
+  }
+  free(target->sprites);
+  free(target);
+}

Scene.h

@@ -0,0 +1,30 @@
+typedef struct sLayer
+{
+  SDL_Surface* sprite;
+  int x,y,h,v;
+  int oX, oY;
+} SLayer;
+
+typedef struct transition
+{
+  int in;
+  SDL_Color incolor;
+  int out;
+  SDL_Color outcolor;
+} Transition;
+
+typedef struct scene
+{
+  SLayer** sprites;
+  int nSprites;
+  int time;
+  Transition fade;
+} Scene;
+
+SLayer* newSLayer(char* filename, int x, int y, int h, int v);
+void deleteSLayer(SLayer* target);
+
+Scene* newScene(int in, int out, int time, SDL_Color incolor, SDL_Color outcolor);
+void buildScene(Scene* self, SLayer* sprite);
+void playScene(Scene* self);
+void deleteScene(Scene* target);

main.c

@@ -12,6 +12,7 @@
 #include "Kaos.h"
 #include "HyperKaos.h"
 #include "WorldData.h"
+#include "Scene.h"
 
 /*const int SCREEN_WIDTH = 320;
 const int SCREEN_HEIGHT = 180;
@@ -68,6 +69,17 @@ int main (int argc, char* args[])
     return 1;
   }
 
+  SDL_Color black = {0,0,0};
+  SLayer* presents = newSLayer("assets/img/backgrounds/presents.png", 0,0,0,0);
+  SLayer* menuTransition = newSLayer("assets/img/backgrounds/mainmenu.png",0,0,0,0);
+  Scene* intro = newScene(30,30, 90, black, black);
+  Scene* transition = newScene(30,0,30, black, black);
+  buildScene(intro, presents);
+  buildScene(transition, menuTransition);
+  playScene(intro);
+  playScene(transition);
+  deleteScene(intro);
+  deleteScene(transition);
 
   // main game loop
   while (!quit)