miguel.horta/commandergenius
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

OpenTyrian: merged upstream changes

Browse Source
This commit is contained in:
pelya
2014-06-09 15:54:16 +03:00
parent 80fa885c13
commit f763376ee4
107 changed files with 3956 additions and 4820 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
project/jni/application/opentyrian/src/backgrnd.c
View File

@@ -1,5 +1,5 @@
/*
* OpenTyrian Classic: A modern cross-platform port of Tyrian
* OpenTyrian: A modern cross-platform port of Tyrian
* Copyright (C) 2007-2009 The OpenTyrian Development Team
*
* This program is free software; you can redistribute it and/or
@@ -20,6 +20,7 @@
#include "backgrnd.h"
#include "config.h"
#include "mtrand.h"
#include "varz.h"
#include "video.h"
@@ -465,4 +466,62 @@ void blur_filter( SDL_Surface *dst, SDL_Surface *src )
}
}
// kate: tab-width 4; vim: set noet:
/* Background Starfield */
typedef struct
{
Uint8 color;
JE_word position; // relies on overflow wrap-around
int speed;
} StarfieldStar;
#define MAX_STARS 100
#define STARFIELD_HUE 0x90
static StarfieldStar starfield_stars[MAX_STARS];
int starfield_speed;
void initialize_starfield( void )
{
for (int i = MAX_STARS-1; i >= 0; --i)
{
starfield_stars[i].position = mt_rand() % 320 + mt_rand() % 200 * VGAScreen->pitch;
starfield_stars[i].speed = mt_rand() % 3 + 2;
starfield_stars[i].color = mt_rand() % 16 + STARFIELD_HUE;
}
}
void update_and_draw_starfield( SDL_Surface* surface, int move_speed )
{
Uint8* p = (Uint8*)surface->pixels;
for (int i = MAX_STARS-1; i >= 0; --i)
{
StarfieldStar* star = &starfield_stars[i];
star->position += (star->speed + move_speed) * surface->pitch;
if (star->position < 177 * surface->pitch)
{
if (p[star->position] == 0)
{
p[star->position] = star->color;
}
// If star is bright enough, draw surrounding pixels
if (star->color - 4 >= STARFIELD_HUE)
{
if (p[star->position + 1] == 0)
p[star->position + 1] = star->color - 4;
if (star->position > 0 && p[star->position - 1] == 0)
p[star->position - 1] = star->color - 4;
if (p[star->position + surface->pitch] == 0)
p[star->position + surface->pitch] = star->color - 4;
if (star->position >= surface->pitch && p[star->position - surface->pitch] == 0)
p[star->position - surface->pitch] = star->color - 4;
}
}
}
}