ref: 4778ea265ca3705e312d6928f346c3f2e7986542
dir: /src/ft2_about.c/
#include <stdio.h> // sprintf()
#include <math.h>
#include "ft2_header.h"
#include "ft2_gui.h"
#include "ft2_bmp.h"
#include "ft2_video.h"
#include "ft2_structs.h"
#include "ft2_gfxdata.h"
#include "ft2_pattern_ed.h" // exitPatternEditorExtended()
#include "ft2_config.h"
#define NUM_STARS 1500 /* for new about screen only */
#define LOGO_ALPHA_PERCENTAGE 72
#define STARSHINE_ALPHA_PERCENTAGE 25
#define SINUS_PHASES 1024
#define ABOUT_SCREEN_X 3
#define ABOUT_SCREEN_Y 3
#define ABOUT_SCREEN_W 626
#define ABOUT_SCREEN_H 167
#define ABOUT_LOGO_W 449
#define ABOUT_LOGO_H 75
typedef struct
{
int16_t x, y, z;
} oldVector_t;
typedef struct
{
uint16_t x, y, z;
} oldRotate_t;
typedef struct
{
oldVector_t x, y, z;
} oldMatrix_t;
typedef struct
{
float x, y, z;
} vector_t;
typedef struct
{
vector_t x, y, z;
} matrix_t;
static const uint16_t sinusTables[256 * 5] =
{
0x0000,0x00C9,0x0192,0x025B,0x0324,0x03ED,0x04B6,0x057F,0x0648,0x0711,0x07D9,0x08A2,0x096A,0x0A33,0x0AFB,0x0BC3,
0x0C8C,0x0D54,0x0E1C,0x0EE3,0x0FAB,0x1072,0x113A,0x1201,0x12C8,0x138F,0x1455,0x151C,0x15E2,0x16A8,0x176D,0x1833,
0x18F8,0x19BD,0x1A82,0x1B47,0x1C0B,0x1CCF,0x1D93,0x1E56,0x1F19,0x1FDC,0x209F,0x2161,0x2223,0x22E5,0x23A6,0x2467,
0x2527,0x25E8,0x26A8,0x2767,0x2826,0x28E5,0x29A3,0x2A61,0x2B1F,0x2BDC,0x2C98,0x2D55,0x2E10,0x2ECC,0x2F87,0x3041,
0x30FB,0x31B5,0x326E,0x3326,0x33DE,0x3496,0x354D,0x3603,0x36B9,0x376F,0x3824,0x38D8,0x398C,0x3A3F,0x3AF2,0x3BA4,
0x3C56,0x3D07,0x3DB7,0x3E67,0x3F16,0x3FC5,0x4073,0x4120,0x41CD,0x4279,0x4325,0x43D0,0x447A,0x4523,0x45CC,0x4674,
0x471C,0x47C3,0x4869,0x490E,0x49B3,0x4A57,0x4AFA,0x4B9D,0x4C3F,0x4CE0,0x4D80,0x4E20,0x4EBF,0x4F5D,0x4FFA,0x5097,
0x5133,0x51CE,0x5268,0x5301,0x539A,0x5432,0x54C9,0x555F,0x55F4,0x5689,0x571D,0x57AF,0x5841,0x58D3,0x5963,0x59F2,
0x5A81,0x5B0F,0x5B9C,0x5C28,0x5CB3,0x5D3D,0x5DC6,0x5E4F,0x5ED6,0x5F5D,0x5FE2,0x6067,0x60EB,0x616E,0x61EF,0x6270,
0x62F0,0x6370,0x63EE,0x646B,0x64E7,0x6562,0x65DC,0x6656,0x66CE,0x6745,0x67BB,0x6831,0x68A5,0x6918,0x698A,0x69FC,
0x6A6C,0x6ADB,0x6B49,0x6BB6,0x6C22,0x6C8E,0x6CF8,0x6D60,0x6DC8,0x6E2F,0x6E95,0x6EFA,0x6F5D,0x6FC0,0x7021,0x7082,
0x70E1,0x713F,0x719C,0x71F8,0x7253,0x72AD,0x7306,0x735E,0x73B4,0x740A,0x745E,0x74B1,0x7503,0x7554,0x75A4,0x75F2,
0x7640,0x768C,0x76D7,0x7722,0x776A,0x77B2,0x77F9,0x783E,0x7883,0x78C6,0x7908,0x7949,0x7988,0x79C7,0x7A04,0x7A40,
0x7A7B,0x7AB5,0x7AED,0x7B25,0x7B5B,0x7B90,0x7BC4,0x7BF7,0x7C28,0x7C58,0x7C87,0x7CB5,0x7CE2,0x7D0D,0x7D38,0x7D61,
0x7D88,0x7DAF,0x7DD4,0x7DF9,0x7E1C,0x7E3D,0x7E5E,0x7E7D,0x7E9B,0x7EB8,0x7ED4,0x7EEE,0x7F08,0x7F20,0x7F36,0x7F4C,
0x7F60,0x7F73,0x7F85,0x7F96,0x7FA5,0x7FB3,0x7FC0,0x7FCC,0x7FD7,0x7FE0,0x7FE8,0x7FEF,0x7FF4,0x7FF8,0x7FFC,0x7FFD,
0x7FFE,0x7FFD,0x7FFC,0x7FF8,0x7FF4,0x7FEF,0x7FE8,0x7FE0,0x7FD7,0x7FCC,0x7FC0,0x7FB3,0x7FA5,0x7F96,0x7F85,0x7F73,
0x7F60,0x7F4C,0x7F36,0x7F20,0x7F08,0x7EEE,0x7ED4,0x7EB8,0x7E9B,0x7E7D,0x7E5E,0x7E3D,0x7E1C,0x7DF9,0x7DD4,0x7DAF,
0x7D88,0x7D61,0x7D38,0x7D0D,0x7CE2,0x7CB5,0x7C87,0x7C58,0x7C28,0x7BF7,0x7BC4,0x7B90,0x7B5B,0x7B25,0x7AED,0x7AB5,
0x7A7B,0x7A40,0x7A04,0x79C7,0x7988,0x7949,0x7908,0x78C6,0x7883,0x783E,0x77F9,0x77B2,0x776A,0x7722,0x76D7,0x768C,
0x7640,0x75F2,0x75A4,0x7554,0x7503,0x74B1,0x745E,0x740A,0x73B4,0x735E,0x7306,0x72AD,0x7253,0x71F8,0x719C,0x713F,
0x70E1,0x7082,0x7021,0x6FC0,0x6F5D,0x6EFA,0x6E95,0x6E2F,0x6DC8,0x6D60,0x6CF8,0x6C8E,0x6C22,0x6BB6,0x6B49,0x6ADB,
0x6A6C,0x69FC,0x698A,0x6918,0x68A5,0x6831,0x67BB,0x6745,0x66CE,0x6656,0x65DC,0x6562,0x64E7,0x646B,0x63EE,0x6370,
0x62F0,0x6270,0x61EF,0x616E,0x60EB,0x6067,0x5FE2,0x5F5D,0x5ED6,0x5E4F,0x5DC6,0x5D3D,0x5CB3,0x5C28,0x5B9C,0x5B0F,
0x5A81,0x59F2,0x5963,0x58D3,0x5841,0x57AF,0x571D,0x5689,0x55F4,0x555F,0x54C9,0x5432,0x539A,0x5301,0x5268,0x51CE,
0x5133,0x5097,0x4FFA,0x4F5D,0x4EBF,0x4E20,0x4D80,0x4CE0,0x4C3F,0x4B9D,0x4AFA,0x4A57,0x49B3,0x490E,0x4869,0x47C3,
0x471C,0x4674,0x45CC,0x4523,0x447A,0x43D0,0x4325,0x4279,0x41CD,0x4120,0x4073,0x3FC5,0x3F16,0x3E67,0x3DB7,0x3D07,
0x3C56,0x3BA4,0x3AF2,0x3A3F,0x398C,0x38D8,0x3824,0x376F,0x36B9,0x3603,0x354D,0x3496,0x33DE,0x3326,0x326E,0x31B5,
0x30FB,0x3041,0x2F87,0x2ECC,0x2E10,0x2D55,0x2C98,0x2BDC,0x2B1F,0x2A61,0x29A3,0x28E5,0x2826,0x2767,0x26A8,0x25E8,
0x2527,0x2467,0x23A6,0x22E5,0x2223,0x2161,0x209F,0x1FDC,0x1F19,0x1E56,0x1D93,0x1CCF,0x1C0B,0x1B47,0x1A82,0x19BD,
0x18F8,0x1833,0x176D,0x16A8,0x15E2,0x151C,0x1455,0x138F,0x12C8,0x1201,0x113A,0x1072,0x0FAB,0x0EE3,0x0E1C,0x0D54,
0x0C8C,0x0BC3,0x0AFB,0x0A33,0x096A,0x08A2,0x07D9,0x0711,0x0648,0x057F,0x04B6,0x03ED,0x0324,0x025B,0x0192,0x00C9,
0x0000,0xFF37,0xFE6E,0xFDA5,0xFCDC,0xFC13,0xFB4A,0xFA81,0xF9B8,0xF8EF,0xF827,0xF75E,0xF696,0xF5CD,0xF505,0xF43D,
0xF374,0xF2AC,0xF1E4,0xF11D,0xF055,0xEF8E,0xEEC6,0xEDFF,0xED38,0xEC71,0xEBAB,0xEAE4,0xEA1E,0xE958,0xE893,0xE7CD,
0xE708,0xE643,0xE57E,0xE4B9,0xE3F5,0xE331,0xE26D,0xE1AA,0xE0E7,0xE024,0xDF61,0xDE9F,0xDDDD,0xDD1B,0xDC5A,0xDB99,
0xDAD9,0xDA18,0xD958,0xD899,0xD7DA,0xD71B,0xD65D,0xD59F,0xD4E1,0xD424,0xD368,0xD2AB,0xD1F0,0xD134,0xD079,0xCFBF,
0xCF05,0xCE4B,0xCD92,0xCCDA,0xCC22,0xCB6A,0xCAB3,0xC9FD,0xC947,0xC891,0xC7DC,0xC728,0xC674,0xC5C1,0xC50E,0xC45C,
0xC3AA,0xC2F9,0xC249,0xC199,0xC0EA,0xC03B,0xBF8D,0xBEE0,0xBE33,0xBD87,0xBCDB,0xBC30,0xBB86,0xBADD,0xBA34,0xB98C,
0xB8E4,0xB83D,0xB797,0xB6F2,0xB64D,0xB5A9,0xB506,0xB463,0xB3C1,0xB320,0xB280,0xB1E0,0xB141,0xB0A3,0xB006,0xAF69,
0xAECD,0xAE32,0xAD98,0xACFF,0xAC66,0xABCE,0xAB37,0xAAA1,0xAA0C,0xA977,0xA8E3,0xA851,0xA7BF,0xA72D,0xA69D,0xA60E,
0xA57F,0xA4F1,0xA464,0xA3D8,0xA34D,0xA2C3,0xA23A,0xA1B1,0xA12A,0xA0A3,0xA01E,0x9F99,0x9F15,0x9E92,0x9E11,0x9D90,
0x9D10,0x9C90,0x9C12,0x9B95,0x9B19,0x9A9E,0x9A24,0x99AA,0x9932,0x98BB,0x9845,0x97CF,0x975B,0x96E8,0x9676,0x9604,
0x9594,0x9525,0x94B7,0x944A,0x93DE,0x9372,0x9308,0x92A0,0x9238,0x91D1,0x916B,0x9106,0x90A3,0x9040,0x8FDF,0x8F7E,
0x8F1F,0x8EC1,0x8E64,0x8E08,0x8DAD,0x8D53,0x8CFA,0x8CA2,0x8C4C,0x8BF6,0x8BA2,0x8B4F,0x8AFD,0x8AAC,0x8A5C,0x8A0E,
0x89C0,0x8974,0x8929,0x88DE,0x8896,0x884E,0x8807,0x87C2,0x877D,0x873A,0x86F8,0x86B7,0x8678,0x8639,0x85FC,0x85C0,
0x8585,0x854B,0x8513,0x84DB,0x84A5,0x8470,0x843C,0x8409,0x83D8,0x83A8,0x8379,0x834B,0x831E,0x82F3,0x82C8,0x829F,
0x8278,0x8251,0x822C,0x8207,0x81E4,0x81C3,0x81A2,0x8183,0x8165,0x8148,0x812C,0x8112,0x80F8,0x80E0,0x80CA,0x80B4,
0x80A0,0x808D,0x807B,0x806A,0x805B,0x804D,0x8040,0x8034,0x8029,0x8020,0x8018,0x8011,0x800C,0x8008,0x8004,0x8003,
0x8002,0x8003,0x8004,0x8008,0x800C,0x8011,0x8018,0x8020,0x8029,0x8034,0x8040,0x804D,0x805B,0x806A,0x807B,0x808D,
0x80A0,0x80B4,0x80CA,0x80E0,0x80F8,0x8112,0x812C,0x8148,0x8165,0x8183,0x81A2,0x81C3,0x81E4,0x8207,0x822C,0x8251,
0x8278,0x829F,0x82C8,0x82F3,0x831E,0x834B,0x8379,0x83A8,0x83D8,0x8409,0x843C,0x8470,0x84A5,0x84DB,0x8513,0x854B,
0x8585,0x85C0,0x85FC,0x8639,0x8678,0x86B7,0x86F8,0x873A,0x877D,0x87C2,0x8807,0x884E,0x8896,0x88DE,0x8929,0x8974,
0x89C0,0x8A0E,0x8A5C,0x8AAC,0x8AFD,0x8B4F,0x8BA2,0x8BF6,0x8C4C,0x8CA2,0x8CFA,0x8D53,0x8DAD,0x8E08,0x8E64,0x8EC1,
0x8F1F,0x8F7E,0x8FDF,0x9040,0x90A3,0x9106,0x916B,0x91D1,0x9238,0x92A0,0x9308,0x9372,0x93DE,0x944A,0x94B7,0x9525,
0x9594,0x9604,0x9676,0x96E8,0x975B,0x97CF,0x9845,0x98BB,0x9932,0x99AA,0x9A24,0x9A9E,0x9B19,0x9B95,0x9C12,0x9C90,
0x9D10,0x9D90,0x9E11,0x9E92,0x9F15,0x9F99,0xA01E,0xA0A3,0xA12A,0xA1B1,0xA23A,0xA2C3,0xA34D,0xA3D8,0xA464,0xA4F1,
0xA57F,0xA60E,0xA69D,0xA72D,0xA7BF,0xA851,0xA8E3,0xA977,0xAA0C,0xAAA1,0xAB37,0xABCE,0xAC66,0xACFF,0xAD98,0xAE32,
0xAECD,0xAF69,0xB006,0xB0A3,0xB141,0xB1E0,0xB280,0xB320,0xB3C1,0xB463,0xB506,0xB5A9,0xB64D,0xB6F2,0xB797,0xB83D,
0xB8E4,0xB98C,0xBA34,0xBADD,0xBB86,0xBC30,0xBCDB,0xBD87,0xBE33,0xBEE0,0xBF8D,0xC03B,0xC0EA,0xC199,0xC249,0xC2F9,
0xC3AA,0xC45C,0xC50E,0xC5C1,0xC674,0xC728,0xC7DC,0xC891,0xC947,0xC9FD,0xCAB3,0xCB6A,0xCC22,0xCCDA,0xCD92,0xCE4B,
0xCF05,0xCFBF,0xD079,0xD134,0xD1F0,0xD2AB,0xD368,0xD424,0xD4E1,0xD59F,0xD65D,0xD71B,0xD7DA,0xD899,0xD958,0xDA18,
0xDAD9,0xDB99,0xDC5A,0xDD1B,0xDDDD,0xDE9F,0xDF61,0xE024,0xE0E7,0xE1AA,0xE26D,0xE331,0xE3F5,0xE4B9,0xE57E,0xE643,
0xE708,0xE7CD,0xE893,0xE958,0xEA1E,0xEAE4,0xEBAB,0xEC71,0xED38,0xEDFF,0xEEC6,0xEF8E,0xF055,0xF11D,0xF1E4,0xF2AC,
0xF374,0xF43D,0xF505,0xF5CD,0xF696,0xF75E,0xF827,0xF8EF,0xF9B8,0xFA81,0xFB4A,0xFC13,0xFCDC,0xFDA5,0xFE6E,0xFF37,
0x0000,0x00C9,0x0192,0x025B,0x0324,0x03ED,0x04B6,0x057F,0x0648,0x0711,0x07D9,0x08A2,0x096A,0x0A33,0x0AFB,0x0BC3,
0x0C8C,0x0D54,0x0E1C,0x0EE3,0x0FAB,0x1072,0x113A,0x1201,0x12C8,0x138F,0x1455,0x151C,0x15E2,0x16A8,0x176D,0x1833,
0x18F8,0x19BD,0x1A82,0x1B47,0x1C0B,0x1CCF,0x1D93,0x1E56,0x1F19,0x1FDC,0x209F,0x2161,0x2223,0x22E5,0x23A6,0x2467,
0x2527,0x25E8,0x26A8,0x2767,0x2826,0x28E5,0x29A3,0x2A61,0x2B1F,0x2BDC,0x2C98,0x2D55,0x2E10,0x2ECC,0x2F87,0x3041,
0x30FB,0x31B5,0x326E,0x3326,0x33DE,0x3496,0x354D,0x3603,0x36B9,0x376F,0x3824,0x38D8,0x398C,0x3A3F,0x3AF2,0x3BA4,
0x3C56,0x3D07,0x3DB7,0x3E67,0x3F16,0x3FC5,0x4073,0x4120,0x41CD,0x4279,0x4325,0x43D0,0x447A,0x4523,0x45CC,0x4674,
0x471C,0x47C3,0x4869,0x490E,0x49B3,0x4A57,0x4AFA,0x4B9D,0x4C3F,0x4CE0,0x4D80,0x4E20,0x4EBF,0x4F5D,0x4FFA,0x5097,
0x5133,0x51CE,0x5268,0x5301,0x539A,0x5432,0x54C9,0x555F,0x55F4,0x5689,0x571D,0x57AF,0x5841,0x58D3,0x5963,0x59F2,
0x5A81,0x5B0F,0x5B9C,0x5C28,0x5CB3,0x5D3D,0x5DC6,0x5E4F,0x5ED6,0x5F5D,0x5FE2,0x6067,0x60EB,0x616E,0x61EF,0x6270,
0x62F0,0x6370,0x63EE,0x646B,0x64E7,0x6562,0x65DC,0x6656,0x66CE,0x6745,0x67BB,0x6831,0x68A5,0x6918,0x698A,0x69FC,
0x6A6C,0x6ADB,0x6B49,0x6BB6,0x6C22,0x6C8E,0x6CF8,0x6D60,0x6DC8,0x6E2F,0x6E95,0x6EFA,0x6F5D,0x6FC0,0x7021,0x7082,
0x70E1,0x713F,0x719C,0x71F8,0x7253,0x72AD,0x7306,0x735E,0x73B4,0x740A,0x745E,0x74B1,0x7503,0x7554,0x75A4,0x75F2,
0x7640,0x768C,0x76D7,0x7722,0x776A,0x77B2,0x77F9,0x783E,0x7883,0x78C6,0x7908,0x7949,0x7988,0x79C7,0x7A04,0x7A40,
0x7A7B,0x7AB5,0x7AED,0x7B25,0x7B5B,0x7B90,0x7BC4,0x7BF7,0x7C28,0x7C58,0x7C87,0x7CB5,0x7CE2,0x7D0D,0x7D38,0x7D61,
0x7D88,0x7DAF,0x7DD4,0x7DF9,0x7E1C,0x7E3D,0x7E5E,0x7E7D,0x7E9B,0x7EB8,0x7ED4,0x7EEE,0x7F08,0x7F20,0x7F36,0x7F4C,
0x7F60,0x7F73,0x7F85,0x7F96,0x7FA5,0x7FB3,0x7FC0,0x7FCC,0x7FD7,0x7FE0,0x7FE8,0x7FEF,0x7FF4,0x7FF8,0x7FFC,0x7FFD
};
static const uint8_t starColConv[24] = { 2,2,2,2,2,2,2,2, 2,2,2,1,1,1,3,3, 3,3,3,3,3,3,3,3 };
static const int16_t *sin32767 = (const int16_t *)sinusTables, *cos32767 = (const int16_t *)&sinusTables[256];
static char *customText0 = "Original FT2 by Magnus \"Vogue\" H\224gdahl & Fredrik \"Mr.H\" Huss";
static char *customText1 = "Clone by Olav \"8bitbubsy\" S\233rensen";
static char *customText2 = "https://16-bits.org";
static char customText3[256];
static int16_t customText0X, customText0Y, customText1Y, customText2Y;
static int16_t customText3Y, customText1X, customText2X, customText3X;
static int16_t sin16[SINUS_PHASES], hastighet;
static int32_t lastStarScreenPos[1000];
static uint16_t logoAlpha16, starShineAlpha16;
static uint32_t randSeed, sinp1, sinp2;
static oldVector_t starcrd[1000];
static oldRotate_t star_a;
static oldMatrix_t starmat;
static vector_t starPoints[NUM_STARS], starRotation;
static matrix_t starMatrix;
void seedAboutScreenRandom(uint32_t newseed)
{
randSeed = newseed;
}
static inline int32_t random32(void)
{
randSeed *= 134775813;
randSeed += 1;
return randSeed;
}
static inline int32_t pascalRandom32(int32_t l) // Turbo Pascal Random() implementation
{
int32_t r;
randSeed *= 134775813;
randSeed += 1;
r = ((int64_t)randSeed * l) >> 32;
return r;
}
static inline int32_t sqr(int32_t x)
{
return x * x;
}
static uint32_t blendPixels(uint32_t pixelA, uint32_t pixelB, uint16_t alpha)
{
const uint16_t invAlpha = alpha ^ 0xFFFF;
const int32_t r = ((RGB32_R(pixelA) * invAlpha) + (RGB32_R(pixelB) * alpha)) >> 16;
const int32_t g = ((RGB32_G(pixelA) * invAlpha) + (RGB32_G(pixelB) * alpha)) >> 16;
const int32_t b = ((RGB32_B(pixelA) * invAlpha) + (RGB32_B(pixelB) * alpha)) >> 16;
return RGB32(r, g, b);
}
static void blendPixelsXY(uint32_t x, uint32_t y, uint32_t pixelB_r, uint32_t pixelB_g, uint32_t pixelB_b, uint16_t alpha)
{
uint32_t *p = &video.frameBuffer[(y * SCREEN_W) + x];
const uint32_t pixelA = *p;
const uint16_t invAlpha = alpha ^ 0xFFFF;
const int32_t r = ((RGB32_R(pixelA) * invAlpha) + (pixelB_r * alpha)) >> 16;
const int32_t g = ((RGB32_G(pixelA) * invAlpha) + (pixelB_g * alpha)) >> 16;
const int32_t b = ((RGB32_B(pixelA) * invAlpha) + (pixelB_b * alpha)) >> 16;
*p = RGB32(r, g, b);
}
static void fixaMatris(oldRotate_t a, oldMatrix_t *mat)
{
const int16_t sa = sin32767[a.x >> 6];
const int16_t ca = cos32767[a.x >> 6];
const int16_t sb = sin32767[a.y >> 6];
const int16_t cb = cos32767[a.y >> 6];
const int16_t sc = sin32767[a.z >> 6];
const int16_t cc = cos32767[a.z >> 6];
mat->x.x = ((ca * cc) >> 16) + (((sc * ((sa * sb) >> 16)) >> 16) << 1);
mat->y.x = (sa * cb) >> 16;
mat->z.x = (((cc * ((sa * sb) >> 16)) >> 16) << 1) - ((ca * sc) >> 16);
mat->x.y = (((sc * ((ca * sb) >> 16)) >> 16) << 1) - ((sa * cc) >> 16);
mat->y.y = (ca * cb) >> 16;
mat->z.y = ((sa * sc) >> 16) + (((cc * ((ca * sb) >> 16)) >> 16) << 1);
mat->x.z = (cb * sc) >> 16;
mat->y.z = 0 - (sb >> 1);
mat->z.z = (cb * cc) >> 16;
}
static void newStarfield(void)
{
if (config.useNewAboutScreen)
{
vector_t *star = starPoints;
for (int16_t i = 0; i < NUM_STARS; i++, star++)
{
star->z += 0.0001f;
if (star->z >= 0.5f)
star->z -= 1.0f;
const float z = (starMatrix.x.z * star->x) + (starMatrix.y.z * star->y) + (starMatrix.z.z * star->z) + 0.5f;
if (z <= 0.0f)
continue;
float y = (((starMatrix.x.y * star->x) + (starMatrix.y.y * star->y) + (starMatrix.z.y * star->z)) / z) * 400.0f;
const int32_t outY = (ABOUT_SCREEN_Y+(ABOUT_SCREEN_H/2)) + (int32_t)y;
if (outY < ABOUT_SCREEN_Y || outY >= ABOUT_SCREEN_Y+ABOUT_SCREEN_H)
continue;
float x = (((starMatrix.x.x * star->x) + (starMatrix.y.x * star->y) + (starMatrix.z.x * star->z)) / z) * 400.0f;
const int32_t outX = (ABOUT_SCREEN_X+(ABOUT_SCREEN_W/2)) + (int32_t)x;
if (outX < ABOUT_SCREEN_X || outX >= ABOUT_SCREEN_X+ABOUT_SCREEN_W)
continue;
int32_t intensity255 = (int32_t)(z * 256.0f);
if (intensity255 > 255)
intensity255 = 255;
intensity255 ^= 255;
// add a tint of blue to the star pixel
int32_t r = intensity255 - 79;
if (r < 0)
r = 0;
int32_t g = intensity255 - 38;
if (g < 0)
g = 0;
int32_t b = intensity255 + 64;
if (b > 255)
b = 255;
// plot and blend sides of star (basic shine effect)
if (outX-1 >= ABOUT_SCREEN_X)
blendPixelsXY(outX-1, outY, r, g, b, starShineAlpha16);
if (outX+1 < ABOUT_SCREEN_X+ABOUT_SCREEN_W)
blendPixelsXY(outX+1, outY, r, g, b, starShineAlpha16);
if (outY-1 >= ABOUT_SCREEN_Y)
blendPixelsXY(outX, outY-1, r, g, b, starShineAlpha16);
if (outY+1 < ABOUT_SCREEN_Y+ABOUT_SCREEN_H)
blendPixelsXY(outX, outY+1, r, g, b, starShineAlpha16);
// plot center pixel
video.frameBuffer[(outY * SCREEN_W) + outX] = RGB32(r, g, b);
}
}
}
static void realStars(void)
{
uint8_t col;
int16_t z, xx, xy, xz, yx, yy, yz, zx, zy, zz;
int32_t x, y, screenBufferPos;
xx = starmat.x.x; xy = starmat.x.y; xz = starmat.x.z;
yx = starmat.y.x; yy = starmat.y.y; yz = starmat.y.z;
zx = starmat.z.x; zy = starmat.z.y; zz = starmat.z.z;
oldVector_t *star = starcrd;
for (int32_t i = 0; i < 1000; i++, star++)
{
// erase last star pixel
screenBufferPos = lastStarScreenPos[i];
if (screenBufferPos >= 0)
{
video.frameBuffer[screenBufferPos] = video.palette[PAL_BCKGRND];
lastStarScreenPos[i] = -1;
}
star->z += hastighet; // this intentionally overflows int16_t
z = (((xz * star->x) >> 16) + ((yz * star->y) >> 16) + ((zz * star->z) >> 16)) + 9000;
if (z <= 100) continue;
y = ((xy * star->x) >> 16) + ((yy * star->y) >> 16) + ((zy * star->z) >> 16);
y = (int16_t)((y << 7) / z) + 84;
if ((uint16_t)y > 173-6) continue;
x = ((xx * star->x) >> 16) + ((yx * star->y) >> 16) + ((zx * star->z) >> 16);
x = (int16_t)((((x >> 2) + x) << 7) / z) + (320-8);
if ((uint16_t)x >= 640-16)
continue;
// render star pixel only if the pixel under it is the background color
screenBufferPos = ((y + 4) * SCREEN_W) + (x + 4);
if ((video.frameBuffer[screenBufferPos] >> 24) == PAL_BCKGRND)
{
col = ((uint8_t)~(z >> 8) >> 3) - (22 - 8);
if (col < 24)
{
video.frameBuffer[screenBufferPos] = video.palette[starColConv[col]];
lastStarScreenPos[i] = screenBufferPos;
}
}
}
}
static void rotateStarfieldMatrix(void)
{
#define F_2PI (float)(2.0 * PI)
const float rx2p = starRotation.x * F_2PI;
const float xsin = sinf(rx2p);
const float xcos = cosf(rx2p);
const float ry2p = starRotation.y * F_2PI;
const float ysin = sinf(ry2p);
const float ycos = cosf(ry2p);
const float rz2p = starRotation.z * F_2PI;
const float zsin = sinf(rz2p);
const float zcos = cosf(rz2p);
// x
starMatrix.x.x = (xcos * zcos) + (zsin * xsin * ysin);
starMatrix.y.x = xsin * ycos;
starMatrix.z.x = (zcos * xsin * ysin) - (xcos * zsin);
// y
starMatrix.x.y = (zsin * xcos * ysin) - (xsin * zcos);
starMatrix.y.y = xcos * ycos;
starMatrix.z.y = (xsin * zsin) + (zcos * xcos * ysin);
// z
starMatrix.x.z = ycos * zsin;
starMatrix.y.z = 0.0f - ysin;
starMatrix.z.z = ycos * zcos;
}
void renderAboutScreenFrame(void)
{
if (config.useNewAboutScreen)
{
clearRect(ABOUT_SCREEN_X, ABOUT_SCREEN_Y, ABOUT_SCREEN_W, ABOUT_SCREEN_H);
// 3D starfield
newStarfield();
starRotation.x -= 0.0003f;
starRotation.y -= 0.0002f;
starRotation.z += 0.0001f;
rotateStarfieldMatrix();
// waving FT2 logo
uint32_t *dstPtr = video.frameBuffer + (ABOUT_SCREEN_Y * SCREEN_W) + ABOUT_SCREEN_X;
for (int32_t y = 0; y < ABOUT_SCREEN_H; y++, dstPtr += SCREEN_W)
{
for (int32_t x = 0; x < ABOUT_SCREEN_W; x++)
{
int32_t srcX = (x - ((ABOUT_SCREEN_W-ABOUT_LOGO_W)/2)) + (sin16[(sinp1+x) & (SINUS_PHASES-1)] >> 10);
int32_t srcY = (y - ((ABOUT_SCREEN_H-ABOUT_LOGO_H)/2)+20) + (sin16[(sinp2+y+x+x) & (SINUS_PHASES-1)] >> 11);
if ((uint32_t)srcX < ABOUT_LOGO_W && (uint32_t)srcY < ABOUT_LOGO_H)
{
const uint32_t logoPixel = bmp.ft2AboutLogo[(srcY * ABOUT_LOGO_W) + srcX];
if (logoPixel != 0x00FF00) // transparency
dstPtr[x] = blendPixels(dstPtr[x], logoPixel, logoAlpha16);
}
}
}
sinp1 = (sinp1 + 2) & (SINUS_PHASES-1);
sinp2 = (sinp2 + 3) & (SINUS_PHASES-1);
// render static texts
textOut(customText0X, customText0Y, PAL_FORGRND, customText0);
textOut(customText1X, customText1Y, PAL_FORGRND, customText1);
textOut(customText2X, customText2Y, PAL_FORGRND, customText2);
textOut(customText3X, customText3Y, PAL_FORGRND, customText3);
}
else // old FT2 about screen
{
star_a.x += 3*64;
star_a.y += 2*64;
star_a.z -= 1*64;
fixaMatris(star_a, &starmat);
realStars();
}
showPushButton(PB_EXIT_ABOUT); // yes, we also have to redraw the exit button per frame :)
}
void showAboutScreen(void) // called once when about screen is opened
{
if (ui.extendedPatternEditor)
exitPatternEditorExtended();
hideTopScreen();
drawFramework(0, 0, 632, 173, FRAMEWORK_TYPE1);
drawFramework(2, 2, 628, 169, FRAMEWORK_TYPE2);
showPushButton(PB_EXIT_ABOUT);
if (config.useNewAboutScreen)
{
vector_t *s = starPoints;
for (int32_t i = 0; i < NUM_STARS; i++, s++)
{
s->x = (float)(random32() * (1.0 / (UINT32_MAX+1.0)));
s->y = (float)(random32() * (1.0 / (UINT32_MAX+1.0)));
s->z = (float)(random32() * (1.0 / (UINT32_MAX+1.0)));
}
// pre-calc sinus table
for (int32_t i = 0; i < SINUS_PHASES; i++)
sin16[i] = (int16_t)round(32767.0 * sin(i * PI * 2.0 / SINUS_PHASES));
sinp1 = 0;
sinp2 = SINUS_PHASES/4; // cosine offset
logoAlpha16 = (65535 * LOGO_ALPHA_PERCENTAGE) / 100;
starShineAlpha16 = (65535 * STARSHINE_ALPHA_PERCENTAGE) / 100;
sprintf(customText3, "v%s (%s)", PROG_VER_STR, __DATE__);
customText0X = (SCREEN_W - textWidth(customText0)) / 2;
customText1X = (SCREEN_W - textWidth(customText1)) / 2;
customText2X = (SCREEN_W-8) - textWidth(customText2);
customText3X = (SCREEN_W-8) - textWidth(customText3);
customText0Y = 157-28;
customText1Y = 157-12;
customText2Y = 157-12;
customText3Y = 157;
}
else
{
oldVector_t *s = starcrd;
const uint8_t type = (uint8_t)pascalRandom32(4);
switch (type)
{
case 0:
{
hastighet = 309;
for (int32_t i = 0; i < 1000; i++, s++)
{
s->z = (int16_t)pascalRandom32(0xFFFF) - 0x8000;
s->y = (int16_t)pascalRandom32(0xFFFF) - 0x8000;
s->x = (int16_t)pascalRandom32(0xFFFF) - 0x8000;
}
}
break;
case 1:
{
hastighet = 0;
for (int32_t i = 0; i < 1000; i++, s++)
{
if (i < 1000/4)
{
s->z = (int16_t)pascalRandom32(0xFFFF) - 0x8000;
s->y = (int16_t)pascalRandom32(0xFFFF) - 0x8000;
s->x = (int16_t)pascalRandom32(0xFFFF) - 0x8000;
}
else
{
int32_t r = pascalRandom32(30000);
int32_t n = pascalRandom32(5);
int32_t w = ((2 * pascalRandom32(2)) - 1) * sqr(pascalRandom32(1000));
double ww = (((M_PI * 2.0) / 5.0) * n) + (r / 12000.0) + (w / 3000000.0);
int32_t h = ((sqr(r) / 30000) * (pascalRandom32(10000) - 5000)) / 12000;
s->x = (int16_t)trunc(r * cos(ww));
s->y = (int16_t)trunc(r * sin(ww));
s->z = (int16_t)h;
}
}
}
break;
case 2:
case 3:
{
hastighet = 0;
for (int32_t i = 0; i < 1000; i++, s++)
{
int32_t r = (int32_t)round(sqrt(pascalRandom32(500) * 500));
int32_t w = pascalRandom32(3000);
int32_t h = cos32767[(((w * 8) + r) / 16) & 1023] / 4;;
s->z = (int16_t)((cos32767[w & 1023] * (w + r)) / 3500);
s->y = (int16_t)((sin32767[w & 1023] * (w + r)) / 3500);
s->x = (int16_t)((h * r) / 500);
}
}
break;
default:
break;
}
star_a.x = 0;
star_a.y = 748;
star_a.z = 200;
for (int32_t i = 0; i < 1000; i++)
lastStarScreenPos[i] = -1;
blit(91, 31, bmp.ft2OldAboutLogo, 449, 111);
}
ui.aboutScreenShown = true;
}
void hideAboutScreen(void)
{
hidePushButton(PB_EXIT_ABOUT);
ui.aboutScreenShown = false;
}
void exitAboutScreen(void)
{
hideAboutScreen();
showTopScreen(true);
}