Broken with an error in the default argument given for parameter 5 of scrnfunk::apply_image in the core source

core.cpp

@@ -0,0 +1,202 @@
+#include "main.h"
+
+namespace scrnfunk
+{
+	// Optimize image on load to reduce processing.
+	SDL_Surface *load_image(const char *file)
+	{
+		SDL_Surface *image_format;
+		SDL_Surface *screen_format;
+
+		// Load image
+		image_format = IMG_Load(file);
+
+		/*
+		    DOES THE FILE EVEN EXIST?
+		*/
+
+		if(image_format != 0)
+		{
+		    // Optimize
+		    screen_format = SDL_DisplayFormat(image_format);
+		
+		    // Release old image
+		    SDL_FreeSurface(image_format);
+		}
+
+		return screen_format;
+	}
+	
+	void apply_image(int x, int y, SDL_Surface* source, SDL_Surface* destination, SDL_Rect* clip = 0)
+	{
+		SDL_Rect pos;
+
+		pos.x = x;
+		pos.y = y;
+
+		SDL_BlitSurface(source, clip, destination, &pos);
+	}
+
+	// Removes color from an image.
+	bool RemoveColor(SDL_Surface* image, Uint8 R, Uint8 G, Uint8 B)
+	{
+		int result;
+
+		// Map color on the image
+		Uint32 color = SDL_MapRGB(image->format, R, G, B);
+
+		// Remove color from the image.
+		result = SDL_SetColorKey(image, SDL_SRCCOLORKEY, color);
+
+		if(!result)
+		    return true;
+		else 
+		    return false;
+	}
+}
+
+
+
+
+namespace scrns
+{
+	// Returns 1 (true) on success, 0 (false) on error.
+	bool initiateSDL(SDL_Surface *screen, int x, int y)
+	{
+		SDL_Surface *vid_init;
+		int init, ttf_ret;
+	
+		// Initiate SDL and check
+		init = SDL_Init(SDL_INIT_VIDEO);
+		if(init < 0)
+		{
+			fprintf(stderr, "Unable to initiate SDL: %s\n", SDL_GetError());
+		    return false;
+		}
+
+		
+		// Set video and check
+		vid_init = SDL_SetVideoMode(x, y, 32, SDL_SWSURFACE);
+		if(vid_init == 0)
+		{
+		    fprintf(stderr, "Video initialization failed: %s", SDL_GetError());
+		    return false;
+		}
+
+
+		// Get video surface and check
+		screen = SDL_GetVideoSurface();
+		if(screen == 0)
+		{
+		    fprintf(stderr, "Failed to get video surface: %s", SDL_GetError());
+		    return false;
+		}
+
+
+		// Set window title
+		SDL_WM_SetCaption(WINDOW_TITLE, 0);
+
+
+		// Initialize SDL_ttf and check
+		ttf_ret = TTF_Init();
+		if(ttf_ret == -1)
+		{
+		    fprintf(stderr, "True Type Font initialization failed: %s", SDL_GetError());
+		    return false;
+		}
+
+		// Success: return video surface
+		return true;
+	}
+
+	SDL_Surface * MainMenu()
+	{
+		// Screen
+		SDL_Surface *screen = 0;
+
+		SDL_Surface *background = 0;
+		SDL_Surface *characters = 0;
+		SDL_Surface *message = 0;
+
+
+		// Image filenames
+		const char *background_image = "stage1.bmp";
+		const char *characters_image = "characters.bmp";
+
+		// Char
+		SDL_Rect clip[2];
+
+		initiateSDL(screen, 900, 675);
+
+		if(screen == 0)
+		{
+			fprintf(stderr, "Start up failure.\n");
+			return NULL;
+		}
+		else
+		{
+			// Load images
+			background = scrnfunk::load_image(background_image);
+			characters = scrnfunk::load_image(characters_image);
+		
+			// The troll's coordinates 
+			clip[0].x = 0;
+			clip[0].y = 0;
+			clip[0].w = 200;
+			clip[0].h = 160;
+		
+			// The codfish's coordinates
+			clip[1].x = 0;
+			clip[1].y = 160;
+			clip[1].w = 200;
+			clip[1].h = 100;
+		
+			// Remove the background from the characters
+			scrnfunk::RemoveColor(characters, 0x00, 0xFF, 0x00); // Green
+		
+			// Blit background image
+			scrnfunk::apply_image(0, 0, background, screen);
+		
+			// Blit troll image
+			scrnfunk::apply_image(700, 40, characters, screen, &clip[0]);
+		
+			// Blit codfish image
+			scrnfunk::apply_image(150, 300, characters, screen, &clip[1]);
+
+			// Setup welcome text
+			SDL_Color whitecolor = { 255, 255, 255 };
+			TTF_Font *font = TTF_OpenFont("CaviarDreams.ttf", 80);
+			const char* text = "Welcome to Trololo";
+		
+		
+			if(!font)
+			{
+				fprintf(stderr, "TTF_OpenFont: %s\n", TTF_GetError());
+			}
+		
+			/*
+					Checks if font or text is 0 due to the documentation:
+					0 font into this function will cause a segfault.
+					0 text into this function will result in undefined behavior.
+			*/
+			if(font != 0 && text != 0)
+				message = TTF_RenderText_Solid(font, text, whitecolor);
+			else
+				fprintf(stderr, "TFF Render Text Solid Error: init error\n");
+		
+			// Apply message
+			if(message != 0)
+				scrnfunk::apply_image(100, 200, message, screen);
+			else
+				fprintf(stderr, "TFF Render Text Solid Error: apply error\n");
+		
+			if(screen != 0)
+				SDL_Flip(screen);
+			else
+				fprintf(stderr, "Couldn't update screen.\n");
+		}
+	
+		return screen;
+	}
+}
+

main.cpp

@@ -1,103 +1,14 @@
-// SDL + Extensions
+#include "main.h"
-#include "SDL/SDL.h"
-#include "SDL/SDL_image.h"
-#include "SDL/SDL_ttf.h"
-
-// Common SDL functions for general processing.
-#include "commonSDL.h"
-
-#define WINDOW_TITLE "Trololo"
-
-// Screen
-SDL_Surface *screen = NULL;
-
-SDL_Surface *background = NULL;
-SDL_Surface *characters = NULL;
-
-SDL_Surface *message = NULL;
-
-// Image filenames
-const char *background_image = "stage1.bmp";
-const char *characters_image = "characters.bmp";
-
-// Char
-SDL_Rect clip[2];
-
 
 int main(int argc, char* args[])
 {					
-	screen = StartUp(WINDOW_TITLE, 900, 675);
-
-	if(screen == NULL)
-	{
-		fprintf(stderr, "Start up failure.\n");
-		return 1;
-	}
-	else
-	{
-		// Load images
-		background = load_image(background_image);
-		characters = load_image(characters_image);
-		
-		// The troll's coordinates 
-		clip[0].x = 0;
-		clip[0].y = 0;
-		clip[0].w = 200;
-		clip[0].h = 160;
-		
-		// The codfish's coordinates
-		clip[1].x = 0;
-		clip[1].y = 160;
-		clip[1].w = 200;
-		clip[1].h = 100;
-		
-		// Remove the background from the characters
-		RemoveColor(characters, 0x00, 0xFF, 0x00); // Green
-		
-		// Blit background image
-		apply_image(0, 0, background, screen);
-		
-		// Blit troll image
-		apply_image(700, 40, characters, screen, &clip[0]);
-		
-		// Blit codfish image
-		apply_image(150, 300, characters, screen, &clip[1]);
-
-		// Setup welcome text
-		SDL_Color whitecolor = { 255, 255, 255 };
-		TTF_Font *font = TTF_OpenFont("CaviarDreams.ttf", 80);
-		const char* text = "Welcome to Trololo";
-		
-		
-		if(!font)
-		{
-			fprintf(stderr, "TTF_OpenFont: %s\n", TTF_GetError());
-		}
-		
-		/*
-			Checks if font or text is NULL due to the documentation:
-				NULL font into this function will cause a segfault.
-				NULL text into this function will result in undefined behavior.
-		*/
-		if(font != NULL && text != NULL)
-			message = TTF_RenderText_Solid(font, text, whitecolor);
-		else
-			fprintf(stderr, "TFF Render Text Solid Error: init error\n");
-		
-		// Apply message
-		if(message != NULL)
-			apply_image(100, 200, message, screen);
-		else
-			fprintf(stderr, "TFF Render Text Solid Error: apply error\n");
-		
-		if(screen != NULL)
-			SDL_Flip(screen);
-		else
-			fprintf(stderr, "Couldn't update screen.\n");
-		
 	SDL_Event event;
 	int quit = 1;
 
+	SDL_Surface *screen;
+	
+	screen = scrns::MainMenu();
+		
 	// Check if user quit
 	while(quit == 1)
 	{
@@ -110,5 +21,4 @@ int main(int argc, char* args[])
 
 	return 0;
 }
-}
 

main.h

@@ -0,0 +1,28 @@
+#ifndef MAIN_H
+#define MAIN_H
+
+// SDL dependencies
+#include "SDL/SDL.h" // SDL 1.2.15 (32 bit)
+#include "SDL/SDL_image.h" // SDL_image (1.2.12)
+#include "SDL/SDL_ttf.h" // SDL_tff (2.0.11)
+
+// Standard dependencies
+#include <cstdio>
+
+namespace scrns
+{
+	bool initiateSDL(SDL_Surface *screen, int x, int y);
+	SDL_Surface * MainMenu();
+}
+
+namespace scrnfunk
+{
+	SDL_Surface *load_image(const char *file);
+	void apply_image(int x, int y, SDL_Surface* source, SDL_Surface* destination, SDL_Rect* clip = 0);
+	bool RemoveColor(SDL_Surface* image, Uint8 R, Uint8 G, Uint8);
+}
+
+#define VERSION 0.1-alpha
+#define WINDOW_TITLE "Trololo"
+
+#endif

makefile

@@ -0,0 +1,4 @@
+SDL_LIBS=`pkg-config --libs sdl` -lSDL -lSDL_image -lSDL_ttf
+INCLUDES=-I/opt/local/include
+all:
+	g++ -Wall -g main.cpp core.cpp main.h -o Trololo ${INCLUDES} ${SDL_LIBS}