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robmcmullen-apple2/src/applevideo.cpp

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//
// Apple 2 video support
//
// All the video modes that a real Apple 2 supports are handled here
//
// by James L. Hammons
// (c) 2005 Underground Software
//
// JLH = James L. Hammons <jlhamm@acm.org>
//
// WHO WHEN WHAT
// --- ---------- ------------------------------------------------------------
// JLH 12/01/2005 Added color TV/monochrome emulation to hi-res code
// JLH 12/09/2005 Cleaned up color TV emulation code
// JLH 12/09/2005 Fixed lo-res color TV/mono emulation modes
//
// STILL TO DO:
//
// - Fix LoRes mode green mono to skip every other scanline instead of fill
// like white mono does
// - Double HiRes
// - 80 column text
// - Fix OSD text display so that it's visible no matter what background is there [DONE]
//
// Display routines seem MUCH slower now... !!! INVESTIGATE !!!
#include "applevideo.h"
#include <string.h> // for memset()
#include <stdio.h>
#include <stdarg.h> // for va_* stuff
//#include <string> // for vsprintf()
#include "apple2.h"
#include "video.h"
#include "charset.h"
#include "font14pt.h"
/* Reference: Technote tn-iigs-063 "Master Color Values"
Color Color Register LR HR DHR Master Color R,G,B
Name Value # # # Value
----------------------------------------------------
Black 0 0 0,4 0 $0000 (0,0,0)
(Magenta) Deep Red 1 1 1 $0D03 (D,0,3)
Dark Blue 2 2 8 $0009 (0,0,9)
(Violet) Purple 3 3 2 9 $0D2D (D,2,D)
Dark Green 4 4 4 $0072 (0,7,2)
(Gray 1) Dark Gray 5 5 5 $0555 (5,5,5)
(Blue) Medium Blue 6 6 6 C $022F (2,2,F)
(Cyan) Light Blue 7 7 D $06AF (6,A,F)
Brown 8 8 2 $0850 (8,5,0)
Orange 9 9 5 3 $0F60 (F,6,0)
(Gray 2) Light Gray A A A $0AAA (A,A,A)
Pink B B B $0F98 (F,9,8)
(Green) Light Green C C 1 6 $01D0 (1,D,0)
Yellow D D 7 $0FF0 (F,F,0)
(Aqua) Aquamarine E E E $04F9 (4,F,9)
White F F 3,7 F $0FFF (F,F,F)
LR: Lo-Res HR: Hi-Res DHR: Double Hi-Res */
// Global variables
bool flash = false;
bool textMode = true;
bool mixedMode = false;
bool displayPage2 = false;
bool hiRes = false;
bool alternateCharset = false;
bool col80Mode = false;
//void SpawnMessage(const char * text, ...);
// Local variables
// We set up the colors this way so that they'll be endian safe
// when we cast them to a uint32_t. Note that the format is RGBA.
// "Master Color Values" palette
static uint8_t colors[16 * 4] = {
0x00, 0x00, 0x00, 0xFF, // Black
0xDD, 0x00, 0x33, 0xFF, // Deep Red (Magenta)
0x00, 0x00, 0x99, 0xFF, // Dark Blue
0xDD, 0x22, 0xDD, 0xFF, // Purple (Violet)
0x00, 0x77, 0x22, 0xFF, // Dark Green
0x55, 0x55, 0x55, 0xFF, // Dark Gray (Gray 1)
0x22, 0x22, 0xFF, 0xFF, // Medium Blue (Blue)
0x66, 0xAA, 0xFF, 0xFF, // Light Blue (Cyan)
0x88, 0x55, 0x00, 0xFF, // Brown
0xFF, 0x66, 0x00, 0xFF, // Orange
0xAA, 0xAA, 0xAA, 0xFF, // Light Gray (Gray 2)
0xFF, 0x99, 0x88, 0xFF, // Pink
0x11, 0xDD, 0x00, 0xFF, // Light Green (Green)
0xFF, 0xFF, 0x00, 0xFF, // Yellow
0x44, 0xFF, 0x99, 0xFF, // Aquamarine (Aqua)
0xFF, 0xFF, 0xFF, 0xFF // White
};
// This palette comes from ApplePC's colors (more realistic to my eye ;-)
static uint8_t altColors[16 * 4] = {
0x00, 0x00, 0x00, 0xFF,
0x7D, 0x20, 0x41, 0xFF,
0x41, 0x30, 0x7D, 0xFF,
0xBE, 0x51, 0xBE, 0xFF,
0x00, 0x5D, 0x3C, 0xFF,
0x7D, 0x7D, 0x7D, 0xFF,
0x41, 0x8E, 0xBA, 0xFF,
0xBE, 0xAE, 0xFB, 0xFF,
0x3C, 0x4D, 0x00, 0xFF,
0xBA, 0x6D, 0x41, 0xFF,
0x7D, 0x7D, 0x7D, 0xFF,
0xFB, 0x9E, 0xBE, 0xFF,
0x3C, 0xAA, 0x3C, 0xFF,
0xBA, 0xCB, 0x7D, 0xFF,
0x7D, 0xDB, 0xBA, 0xFF,
0xFB, 0xFB, 0xFB, 0xFF };
// Lo-res starting line addresses
static uint16_t lineAddrLoRes[24] = {
0x0400, 0x0480, 0x0500, 0x0580, 0x0600, 0x0680, 0x0700, 0x0780,
0x0428, 0x04A8, 0x0528, 0x05A8, 0x0628, 0x06A8, 0x0728, 0x07A8,
0x0450, 0x04D0, 0x0550, 0x05D0, 0x0650, 0x06D0, 0x0750, 0x07D0 };
// Hi-res starting line addresses
static uint16_t lineAddrHiRes[192] = {
0x2000, 0x2400, 0x2800, 0x2C00, 0x3000, 0x3400, 0x3800, 0x3C00,
0x2080, 0x2480, 0x2880, 0x2C80, 0x3080, 0x3480, 0x3880, 0x3C80,
0x2100, 0x2500, 0x2900, 0x2D00, 0x3100, 0x3500, 0x3900, 0x3D00,
0x2180, 0x2580, 0x2980, 0x2D80, 0x3180, 0x3580, 0x3980, 0x3D80,
0x2200, 0x2600, 0x2A00, 0x2E00, 0x3200, 0x3600, 0x3A00, 0x3E00,
0x2280, 0x2680, 0x2A80, 0x2E80, 0x3280, 0x3680, 0x3A80, 0x3E80,
0x2300, 0x2700, 0x2B00, 0x2F00, 0x3300, 0x3700, 0x3B00, 0x3F00,
0x2380, 0x2780, 0x2B80, 0x2F80, 0x3380, 0x3780, 0x3B80, 0x3F80,
0x2028, 0x2428, 0x2828, 0x2C28, 0x3028, 0x3428, 0x3828, 0x3C28,
0x20A8, 0x24A8, 0x28A8, 0x2CA8, 0x30A8, 0x34A8, 0x38A8, 0x3CA8,
0x2128, 0x2528, 0x2928, 0x2D28, 0x3128, 0x3528, 0x3928, 0x3D28,
0x21A8, 0x25A8, 0x29A8, 0x2DA8, 0x31A8, 0x35A8, 0x39A8, 0x3DA8,
0x2228, 0x2628, 0x2A28, 0x2E28, 0x3228, 0x3628, 0x3A28, 0x3E28,
0x22A8, 0x26A8, 0x2AA8, 0x2EA8, 0x32A8, 0x36A8, 0x3AA8, 0x3EA8,
0x2328, 0x2728, 0x2B28, 0x2F28, 0x3328, 0x3728, 0x3B28, 0x3F28,
0x23A8, 0x27A8, 0x2BA8, 0x2FA8, 0x33A8, 0x37A8, 0x3BA8, 0x3FA8,
0x2050, 0x2450, 0x2850, 0x2C50, 0x3050, 0x3450, 0x3850, 0x3C50,
0x20D0, 0x24D0, 0x28D0, 0x2CD0, 0x30D0, 0x34D0, 0x38D0, 0x3CD0,
0x2150, 0x2550, 0x2950, 0x2D50, 0x3150, 0x3550, 0x3950, 0x3D50,
0x21D0, 0x25D0, 0x29D0, 0x2DD0, 0x31D0, 0x35D0, 0x39D0, 0x3DD0,
0x2250, 0x2650, 0x2A50, 0x2E50, 0x3250, 0x3650, 0x3A50, 0x3E50,
0x22D0, 0x26D0, 0x2AD0, 0x2ED0, 0x32D0, 0x36D0, 0x3AD0, 0x3ED0,
0x2350, 0x2750, 0x2B50, 0x2F50, 0x3350, 0x3750, 0x3B50, 0x3F50,
0x23D0, 0x27D0, 0x2BD0, 0x2FD0, 0x33D0, 0x37D0, 0x3BD0, 0x3FD0 };
uint16_t appleHiresToMono[0x200] = {
0x0000, 0x3000, 0x0C00, 0x3C00, 0x0300, 0x3300, 0x0F00, 0x3F00,
0x00C0, 0x30C0, 0x0CC0, 0x3CC0, 0x03C0, 0x33C0, 0x0FC0, 0x3FC0, // $0x
0x0030, 0x3030, 0x0C30, 0x3C30, 0x0330, 0x3330, 0x0F30, 0x3F30,
0x00F0, 0x30F0, 0x0CF0, 0x3CF0, 0x03F0, 0x33F0, 0x0FF0, 0x3FF0, // $1x
0x000C, 0x300C, 0x0C0C, 0x3C0C, 0x030C, 0x330C, 0x0F0C, 0x3F0C,
0x00CC, 0x30CC, 0x0CCC, 0x3CCC, 0x03CC, 0x33CC, 0x0FCC, 0x3FCC, // $2x
0x003C, 0x303C, 0x0C3C, 0x3C3C, 0x033C, 0x333C, 0x0F3C, 0x3F3C,
0x00FC, 0x30FC, 0x0CFC, 0x3CFC, 0x03FC, 0x33FC, 0x0FFC, 0x3FFC, // $3x
0x0003, 0x3003, 0x0C03, 0x3C03, 0x0303, 0x3303, 0x0F03, 0x3F03,
0x00C3, 0x30C3, 0x0CC3, 0x3CC3, 0x03C3, 0x33C3, 0x0FC3, 0x3FC3, // $4x
0x0033, 0x3033, 0x0C33, 0x3C33, 0x0333, 0x3333, 0x0F33, 0x3F33,
0x00F3, 0x30F3, 0x0CF3, 0x3CF3, 0x03F3, 0x33F3, 0x0FF3, 0x3FF3, // $5x
0x000F, 0x300F, 0x0C0F, 0x3C0F, 0x030F, 0x330F, 0x0F0F, 0x3F0F,
0x00CF, 0x30CF, 0x0CCF, 0x3CCF, 0x03CF, 0x33CF, 0x0FCF, 0x3FCF, // $6x
0x003F, 0x303F, 0x0C3F, 0x3C3F, 0x033F, 0x333F, 0x0F3F, 0x3F3F,
0x00FF, 0x30FF, 0x0CFF, 0x3CFF, 0x03FF, 0x33FF, 0x0FFF, 0x3FFF, // $7x
0x0000, 0x1800, 0x0600, 0x1E00, 0x0180, 0x1980, 0x0780, 0x1F80,
0x0060, 0x1860, 0x0660, 0x1E60, 0x01E0, 0x19E0, 0x07E0, 0x1FE0, // $8x
0x0018, 0x1818, 0x0618, 0x1E18, 0x0198, 0x1998, 0x0798, 0x1F98,
0x0078, 0x1878, 0x0678, 0x1E78, 0x01F8, 0x19F8, 0x07F8, 0x1FF8, // $9x
0x0006, 0x1806, 0x0606, 0x1E06, 0x0186, 0x1986, 0x0786, 0x1F86,
0x0066, 0x1866, 0x0666, 0x1E66, 0x01E6, 0x19E6, 0x07E6, 0x1FE6, // $Ax
0x001E, 0x181E, 0x061E, 0x1E1E, 0x019E, 0x199E, 0x079E, 0x1F9E,
0x007E, 0x187E, 0x067E, 0x1E7E, 0x01FE, 0x19FE, 0x07FE, 0x1FFE, // $Bx
0x0001, 0x1801, 0x0601, 0x1E01, 0x0181, 0x1981, 0x0781, 0x1F81,
0x0061, 0x1861, 0x0661, 0x1E61, 0x01E1, 0x19E1, 0x07E1, 0x1FE1, // $Cx
0x0019, 0x1819, 0x0619, 0x1E19, 0x0199, 0x1999, 0x0799, 0x1F99,
0x0079, 0x1879, 0x0679, 0x1E79, 0x01F9, 0x19F9, 0x07F9, 0x1FF9, // $Dx
0x0007, 0x1807, 0x0607, 0x1E07, 0x0187, 0x1987, 0x0787, 0x1F87,
0x0067, 0x1867, 0x0667, 0x1E67, 0x01E7, 0x19E7, 0x07E7, 0x1FE7, // $Ex
0x001F, 0x181F, 0x061F, 0x1E1F, 0x019F, 0x199F, 0x079F, 0x1F9F,
0x007F, 0x187F, 0x067F, 0x1E7F, 0x01FF, 0x19FF, 0x07FF, 0x1FFF, // $Fx
// Second half adds in the previous byte's lo pixel
0x0000, 0x3000, 0x0C00, 0x3C00, 0x0300, 0x3300, 0x0F00, 0x3F00,
0x00C0, 0x30C0, 0x0CC0, 0x3CC0, 0x03C0, 0x33C0, 0x0FC0, 0x3FC0, // $0x
0x0030, 0x3030, 0x0C30, 0x3C30, 0x0330, 0x3330, 0x0F30, 0x3F30,
0x00F0, 0x30F0, 0x0CF0, 0x3CF0, 0x03F0, 0x33F0, 0x0FF0, 0x3FF0, // $1x
0x000C, 0x300C, 0x0C0C, 0x3C0C, 0x030C, 0x330C, 0x0F0C, 0x3F0C,
0x00CC, 0x30CC, 0x0CCC, 0x3CCC, 0x03CC, 0x33CC, 0x0FCC, 0x3FCC, // $2x
0x003C, 0x303C, 0x0C3C, 0x3C3C, 0x033C, 0x333C, 0x0F3C, 0x3F3C,
0x00FC, 0x30FC, 0x0CFC, 0x3CFC, 0x03FC, 0x33FC, 0x0FFC, 0x3FFC, // $3x
0x0003, 0x3003, 0x0C03, 0x3C03, 0x0303, 0x3303, 0x0F03, 0x3F03,
0x00C3, 0x30C3, 0x0CC3, 0x3CC3, 0x03C3, 0x33C3, 0x0FC3, 0x3FC3, // $4x
0x0033, 0x3033, 0x0C33, 0x3C33, 0x0333, 0x3333, 0x0F33, 0x3F33,
0x00F3, 0x30F3, 0x0CF3, 0x3CF3, 0x03F3, 0x33F3, 0x0FF3, 0x3FF3, // $5x
0x000F, 0x300F, 0x0C0F, 0x3C0F, 0x030F, 0x330F, 0x0F0F, 0x3F0F,
0x00CF, 0x30CF, 0x0CCF, 0x3CCF, 0x03CF, 0x33CF, 0x0FCF, 0x3FCF, // $6x
0x003F, 0x303F, 0x0C3F, 0x3C3F, 0x033F, 0x333F, 0x0F3F, 0x3F3F,
0x00FF, 0x30FF, 0x0CFF, 0x3CFF, 0x03FF, 0x33FF, 0x0FFF, 0x3FFF, // $7x
0x2000, 0x3800, 0x2600, 0x3E00, 0x2180, 0x3980, 0x2780, 0x3F80,
0x2060, 0x3860, 0x2660, 0x3E60, 0x21E0, 0x39E0, 0x27E0, 0x3FE0, // $8x
0x2018, 0x3818, 0x2618, 0x3E18, 0x2198, 0x3998, 0x2798, 0x3F98,
0x2078, 0x3878, 0x2678, 0x3E78, 0x21F8, 0x39F8, 0x27F8, 0x3FF8, // $9x
0x2006, 0x3806, 0x2606, 0x3E06, 0x2186, 0x3986, 0x2786, 0x3F86,
0x2066, 0x3866, 0x2666, 0x3E66, 0x21E6, 0x39E6, 0x27E6, 0x3FE6, // $Ax
0x201E, 0x381E, 0x261E, 0x3E1E, 0x219E, 0x399E, 0x279E, 0x3F9E,
0x207E, 0x387E, 0x267E, 0x3E7E, 0x21FE, 0x39FE, 0x27FE, 0x3FFE, // $Bx
0x2001, 0x3801, 0x2601, 0x3E01, 0x2181, 0x3981, 0x2781, 0x3F81,
0x2061, 0x3861, 0x2661, 0x3E61, 0x21E1, 0x39E1, 0x27E1, 0x3FE1, // $Cx
0x2019, 0x3819, 0x2619, 0x3E19, 0x2199, 0x3999, 0x2799, 0x3F99,
0x2079, 0x3879, 0x2679, 0x3E79, 0x21F9, 0x39F9, 0x27F9, 0x3FF9, // $Dx
0x2007, 0x3807, 0x2607, 0x3E07, 0x2187, 0x3987, 0x2787, 0x3F87,
0x2067, 0x3867, 0x2667, 0x3E67, 0x21E7, 0x39E7, 0x27E7, 0x3FE7, // $Ex
0x201F, 0x381F, 0x261F, 0x3E1F, 0x219F, 0x399F, 0x279F, 0x3F9F,
0x207F, 0x387F, 0x267F, 0x3E7F, 0x21FF, 0x39FF, 0x27FF, 0x3FFF // $Fx
};
//static uint8_t blurTable[0x800][8]; // Color TV blur table
static uint8_t blurTable[0x80][8]; // Color TV blur table
static uint8_t mirrorTable[0x100];
static uint32_t * palette = (uint32_t *)altColors;
enum { ST_FIRST_ENTRY = 0, ST_COLOR_TV = 0, ST_WHITE_MONO, ST_GREEN_MONO, ST_LAST_ENTRY };
static uint8_t screenType = ST_COLOR_TV;
// Local functions
static void Render40ColumnTextLine(uint8_t line);
static void Render80ColumnTextLine(uint8_t line);
static void Render40ColumnText(void);
static void Render80ColumnText(void);
static void RenderLoRes(uint16_t toLine = 24);
static void RenderHiRes(uint16_t toLine = 192);
static void RenderDHiRes(uint16_t toLine = 192);
void SetupBlurTable(void)
{
// NOTE: This table only needs to be 7 bits wide instead of 11, since the
// last four bits are copies of the previous four...
// Odd. Doing the bit patterns from 0-$7F doesn't work, but going
// from 0-$7FF stepping by 16 does. Hm.
// Well, it seems that going from 0-$7F doesn't have enough precision to do the job.
#if 0
// for(uint16_t bitPat=0; bitPat<0x800; bitPat++)
for(uint16_t bitPat=0; bitPat<0x80; bitPat++)
{
/* uint16_t w3 = bitPat & 0x888;
uint16_t w2 = bitPat & 0x444;
uint16_t w1 = bitPat & 0x222;
uint16_t w0 = bitPat & 0x111;*/
uint16_t w3 = bitPat & 0x88;
uint16_t w2 = bitPat & 0x44;
uint16_t w1 = bitPat & 0x22;
uint16_t w0 = bitPat & 0x11;
uint16_t blurred3 = (w3 | (w3 >> 1) | (w3 >> 2) | (w3 >> 3)) & 0x00FF;
uint16_t blurred2 = (w2 | (w2 >> 1) | (w2 >> 2) | (w2 >> 3)) & 0x00FF;
uint16_t blurred1 = (w1 | (w1 >> 1) | (w1 >> 2) | (w1 >> 3)) & 0x00FF;
uint16_t blurred0 = (w0 | (w0 >> 1) | (w0 >> 2) | (w0 >> 3)) & 0x00FF;
for(int8_t i=7; i>=0; i--)
{
uint8_t color = (((blurred0 >> i) & 0x01) << 3)
| (((blurred1 >> i) & 0x01) << 2)
| (((blurred2 >> i) & 0x01) << 1)
| ((blurred3 >> i) & 0x01);
blurTable[bitPat][7 - i] = color;
}
}
#else
for(uint16_t bitPat=0; bitPat<0x800; bitPat+=0x10)
{
uint16_t w0 = bitPat & 0x111, w1 = bitPat & 0x222, w2 = bitPat & 0x444, w3 = bitPat & 0x888;
uint16_t blurred0 = (w0 | (w0 >> 1) | (w0 >> 2) | (w0 >> 3)) & 0x00FF;
uint16_t blurred1 = (w1 | (w1 >> 1) | (w1 >> 2) | (w1 >> 3)) & 0x00FF;
uint16_t blurred2 = (w2 | (w2 >> 1) | (w2 >> 2) | (w2 >> 3)) & 0x00FF;
uint16_t blurred3 = (w3 | (w3 >> 1) | (w3 >> 2) | (w3 >> 3)) & 0x00FF;
for(int8_t i=7; i>=0; i--)
{
uint8_t color = (((blurred0 >> i) & 0x01) << 3)
| (((blurred1 >> i) & 0x01) << 2)
| (((blurred2 >> i) & 0x01) << 1)
| ((blurred3 >> i) & 0x01);
blurTable[bitPat >> 4][7 - i] = color;
}
}
#endif
for(int i=0; i<256; i++)
{
mirrorTable[i] = ((i & 0x01) << 7)
| ((i & 0x02) << 5)
| ((i & 0x04) << 3)
| ((i & 0x08) << 1)
| ((i & 0x10) >> 1)
| ((i & 0x20) >> 3)
| ((i & 0x40) >> 5)
| ((i & 0x80) >> 7);
}
}
void TogglePalette(void)
{
if (palette == (uint32_t *)colors)
{
palette = (uint32_t *)altColors;
SpawnMessage("Color TV palette");
}
else
{
palette = (uint32_t *)colors;
SpawnMessage("\"Master Color Values\" palette");
}
}
void CycleScreenTypes(void)
{
char scrTypeStr[3][40] = { "Color TV", "White monochrome", "Green monochrome" };
screenType++;
if (screenType == ST_LAST_ENTRY)
screenType = ST_FIRST_ENTRY;
SpawnMessage("%s", scrTypeStr[screenType]);
}
static uint32_t msgTicks = 0;
static char message[4096];
void SpawnMessage(const char * text, ...)
{
va_list arg;
va_start(arg, text);
vsprintf(message, text, arg);
va_end(arg);
msgTicks = 120;
}
static void DrawString2(uint32_t x, uint32_t y, uint32_t color);
static void DrawString(void)
{
//This approach works, and seems to be fast enough... Though it probably would
//be better to make the oversized font to match this one...
for(uint32_t x=7; x<=9; x++)
for(uint32_t y=7; y<=9; y++)
DrawString2(x, y, 0x00000000);
DrawString2(8, 8, 0x0020FF20);
}
static void DrawString2(uint32_t x, uint32_t y, uint32_t color)
{
//uint32_t x = 8, y = 8;
uint32_t length = strlen(message), address = x + (y * VIRTUAL_SCREEN_WIDTH);
// uint32_t color = 0x0020FF20;
//This could be done ahead of time, instead of on each pixel...
//(Now it is!)
uint8_t nBlue = (color >> 16) & 0xFF, nGreen = (color >> 8) & 0xFF, nRed = color & 0xFF;
for(uint32_t i=0; i<length; i++)
{
uint8_t c = message[i];
c = (c < 32 ? 0 : c - 32);
uint32_t fontAddr = (uint32_t)c * FONT_WIDTH * FONT_HEIGHT;
for(uint32_t yy=0; yy<FONT_HEIGHT; yy++)
{
for(uint32_t xx=0; xx<FONT_WIDTH; xx++)
{
/* uint8_t fontTrans = font1[fontAddr++];
// uint32_t newTrans = (fontTrans * transparency / 255) << 24;
uint32_t newTrans = fontTrans << 24;
uint32_t pixel = newTrans | color;
*(scrBuffer + address + xx + (yy * VIRTUAL_SCREEN_WIDTH)) = pixel;//*/
uint8_t trans = font1[fontAddr++];
if (trans)
{
uint32_t existingColor = *(scrBuffer + address + xx + (yy * VIRTUAL_SCREEN_WIDTH));
uint8_t eBlue = (existingColor >> 16) & 0xFF,
eGreen = (existingColor >> 8) & 0xFF,
eRed = existingColor & 0xFF;
//This could be sped up by using a table of 5 + 5 + 5 bits (32 levels transparency -> 32768 entries)
//Here we've modified it to have 33 levels of transparency (could have any # we want!)
//because dividing by 32 is faster than dividing by 31...!
uint8_t invTrans = 255 - trans;
uint32_t bRed = (eRed * invTrans + nRed * trans) / 255;
uint32_t bGreen = (eGreen * invTrans + nGreen * trans) / 255;
uint32_t bBlue = (eBlue * invTrans + nBlue * trans) / 255;
//THIS IS NOT ENDIAN SAFE
*(scrBuffer + address + xx + (yy * VIRTUAL_SCREEN_WIDTH)) = 0xFF000000 | (bBlue << 16) | (bGreen << 8) | bRed;
}
}
}
address += FONT_WIDTH;
}
}
static void Render40ColumnTextLine(uint8_t line)
{
uint32_t pixelOn = (screenType == ST_GREEN_MONO ? 0xFF61FF61 : 0xFFFFFFFF);
for(int x=0; x<40; x++)
{
uint8_t chr = ram[lineAddrLoRes[line] + (displayPage2 ? 0x0400 : 0x0000) + x];
// Render character at (x, y)
for(int cy=0; cy<8; cy++)
{
for(int cx=0; cx<7; cx++)
{
uint32_t pixel = 0xFF000000;
if (alternateCharset)
{
if (textChar[((chr & 0x3F) * 56) + cx + (cy * 7)])
pixel = pixelOn;
if (chr < 0x80)
pixel = pixel ^ (screenType == ST_GREEN_MONO ? 0x0061FF61 : 0x00FFFFFF);
if ((chr & 0xC0) == 0x40 && flash)
pixel = 0xFF000000;
}
else
{
if (textChar2e[(chr * 56) + cx + (cy * 7)])
pixel = pixelOn;
}
scrBuffer[(x * 7 * 2) + (line * VIRTUAL_SCREEN_WIDTH * 8 * 2) + (cx * 2) + 0 + (cy * VIRTUAL_SCREEN_WIDTH * 2)] = pixel;
scrBuffer[(x * 7 * 2) + (line * VIRTUAL_SCREEN_WIDTH * 8 * 2) + (cx * 2) + 1 + (cy * VIRTUAL_SCREEN_WIDTH * 2)] = pixel;
// QnD method to get blank alternate lines in text mode
if (screenType == ST_GREEN_MONO)
pixel = 0xFF000000;
{
scrBuffer[(x * 7 * 2) + (line * VIRTUAL_SCREEN_WIDTH * 8 * 2) + (cx * 2) + 0 + (((cy * 2) + 1) * VIRTUAL_SCREEN_WIDTH)] = pixel;
scrBuffer[(x * 7 * 2) + (line * VIRTUAL_SCREEN_WIDTH * 8 * 2) + (cx * 2) + 1 + (((cy * 2) + 1) * VIRTUAL_SCREEN_WIDTH)] = pixel;
}
}
}
}
}
static void Render80ColumnTextLine(uint8_t line)
{
uint32_t pixelOn = (screenType == ST_GREEN_MONO ? 0xFF61FF61 : 0xFFFFFFFF);
for(int x=0; x<80; x++)
{
#if 0
// This is wrong; it should grab from the alt bank if Page2 is set, not main RAM @ $0
uint8_t chr = ram[lineAddrLoRes[line] + (displayPage2 ? 0x0400 : 0x0000) + x];
if (x > 39)
chr = ram2[lineAddrLoRes[line] + (displayPage2 ? 0x0400 : 0x0000) + x - 40];
#else
uint8_t chr;
if (x & 0x01)
chr = ram[lineAddrLoRes[line] + (x >> 1)];
else
chr = ram2[lineAddrLoRes[line] + (x >> 1)];
#endif
// Render character at (x, y)
for(int cy=0; cy<8; cy++)
{
for(int cx=0; cx<7; cx++)
{
uint32_t pixel = 0xFF000000;
if (alternateCharset)
{
if (textChar[((chr & 0x3F) * 56) + cx + (cy * 7)])
pixel = pixelOn;
if (chr < 0x80)
pixel = pixel ^ (screenType == ST_GREEN_MONO ? 0x0061FF61 : 0x00FFFFFF);
if ((chr & 0xC0) == 0x40 && flash)
pixel = 0xFF000000;
}
else
{
if (textChar2e[(chr * 56) + cx + (cy * 7)])
pixel = pixelOn;
}
scrBuffer[(x * 7) + (line * VIRTUAL_SCREEN_WIDTH * 8 * 2) + cx + (cy * 2 * VIRTUAL_SCREEN_WIDTH)] = pixel;
// QnD method to get blank alternate lines in text mode
if (screenType == ST_GREEN_MONO)
pixel = 0xFF000000;
scrBuffer[(x * 7) + (line * VIRTUAL_SCREEN_WIDTH * 8 * 2) + cx + (((cy * 2) + 1) * VIRTUAL_SCREEN_WIDTH)] = pixel;
}
}
}
}
static void Render40ColumnText(void)
{
for(uint8_t line=0; line<24; line++)
Render40ColumnTextLine(line);
}
static void Render80ColumnText(void)
{
for(uint8_t line=0; line<24; line++)
Render80ColumnTextLine(line);
}
static void RenderLoRes(uint16_t toLine/*= 24*/)
{
// NOTE: The green mono rendering doesn't skip every other line... !!! FIX !!!
// Also, we could set up three different Render functions depending on which
// render type was set and call it with a function pointer. Would be faster
// then the nested ifs we have now.
/*
Note that these colors correspond to the bit patterns generated by the numbers 0-F in order:
Color #s correspond to the bit patterns in reverse... Interesting!
00 00 00 -> 0 [0000] -> 0 (lores color #)
3c 4d 00 -> 8 [0001] -> 8? BROWN
00 5d 3c -> 4 [0010] -> 4? DARK GREEN
3c aa 3c -> 12 [0011] -> 12? LIGHT GREEN (GREEN)
41 30 7d -> 2 [0100] -> 2? DARK BLUE
7d 7d 7d -> 10 [0101] -> 10? LIGHT GRAY
41 8e ba -> 6 [0110] -> 6? MEDIUM BLUE (BLUE)
7d db ba -> 14 [0111] -> 14? AQUAMARINE (AQUA)
7d 20 41 -> 1 [1000] -> 1? DEEP RED (MAGENTA)
ba 6d 41 -> 9 [1001] -> 9? ORANGE
7d 7d 7d -> 5 [1010] -> 5? DARK GRAY
ba cb 7d -> 13 [1011] -> 13? YELLOW
be 51 be -> 3 [1100] -> 3 PURPLE (VIOLET)
fb 9e be -> 11 [1101] -> 11? PINK
be ae fb -> 7 [1110] -> 7? LIGHT BLUE (CYAN)
fb fb fb -> 15 [1111] -> 15 WHITE
*/
uint8_t mirrorNybble[16] = { 0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, 11, 7, 15 };
//This is the old "perfect monitor" rendering code...
/* if (screenType != ST_COLOR_TV) // Not correct, but for now...
//if (1)
{
for(uint16_t y=0; y<toLine; y++)
{
for(uint16_t x=0; x<40; x++)
{
uint8_t scrByte = ram[lineAddrLoRes[y] + (displayPage2 ? 0x0400 : 0x0000) + x];
uint32_t pixel = palette[scrByte & 0x0F];
for(int cy=0; cy<4; cy++)
for(int cx=0; cx<14; cx++)
scrBuffer[((x * 14) + cx) + (((y * 8) + cy) * VIRTUAL_SCREEN_WIDTH)] = pixel;
pixel = palette[scrByte >> 4];
for(int cy=4; cy<8; cy++)
for(int cx=0; cx<14; cx++)
scrBuffer[(x * 14) + (y * VIRTUAL_SCREEN_WIDTH * 8) + cx + (cy * VIRTUAL_SCREEN_WIDTH)] = pixel;
}
}
}
else//*/
uint32_t pixelOn = (screenType == ST_WHITE_MONO ? 0xFFFFFFFF : 0xFF61FF61);
for(uint16_t y=0; y<toLine; y++)
{
// Do top half of lores screen bytes...
uint32_t previous3Bits = 0;
for(uint16_t x=0; x<40; x+=2)
{
uint8_t scrByte1 = ram[lineAddrLoRes[y] + (displayPage2 ? 0x0400 : 0x0000) + x + 0] & 0x0F;
uint8_t scrByte2 = ram[lineAddrLoRes[y] + (displayPage2 ? 0x0400 : 0x0000) + x + 1] & 0x0F;
scrByte1 = mirrorNybble[scrByte1];
scrByte2 = mirrorNybble[scrByte2];
// This is just a guess, but it'll have to do for now...
uint32_t pixels = previous3Bits | (scrByte1 << 24) | (scrByte1 << 20) | (scrByte1 << 16)
| ((scrByte1 & 0x0C) << 12) | ((scrByte2 & 0x03) << 12)
| (scrByte2 << 8) | (scrByte2 << 4) | scrByte2;
// We now have 28 pixels (expanded from 14) in word: mask is $0F FF FF FF
// 0ppp 1111 1111 1111 11|11 1111 1111 1111
// 31 27 23 19 15 11 7 3 0
if (screenType == ST_COLOR_TV)
{
for(uint8_t i=0; i<7; i++)
{
uint8_t bitPat = (pixels & 0x7F000000) >> 24;
pixels <<= 4;
for(uint8_t j=0; j<4; j++)
{
uint8_t color = blurTable[bitPat][j];
for(uint32_t cy=0; cy<8; cy++)
{
scrBuffer[((x * 14) + (i * 4) + j) + (((y * 16) + cy) * VIRTUAL_SCREEN_WIDTH)] = palette[color];
// scrBuffer[((x * 14) + (i * 4) + j) + (((y * 16) + cy) * VIRTUAL_SCREEN_WIDTH)] = palette[color];
}
}
}
previous3Bits = pixels & 0x70000000;
}
else
{
for(int j=0; j<28; j++)
{
for(uint32_t cy=0; cy<8; cy++)
{
scrBuffer[((x * 14) + j) + (((y * 16) + cy) * VIRTUAL_SCREEN_WIDTH)] = (pixels & 0x08000000 ? pixelOn : 0xFF000000);
// scrBuffer[((x * 14) + j) + (((y * 16) + cy) * VIRTUAL_SCREEN_WIDTH)] = (pixels & 0x08000000 ? pixelOn : 0xFF000000);
}
pixels <<= 1;
}
}
}
// Now do bottom half...
previous3Bits = 0;
for(uint16_t x=0; x<40; x+=2)
{
uint8_t scrByte1 = ram[lineAddrLoRes[y] + (displayPage2 ? 0x0400 : 0x0000) + x + 0] >> 4;
uint8_t scrByte2 = ram[lineAddrLoRes[y] + (displayPage2 ? 0x0400 : 0x0000) + x + 1] >> 4;
scrByte1 = mirrorNybble[scrByte1];
scrByte2 = mirrorNybble[scrByte2];
// This is just a guess, but it'll have to do for now...
uint32_t pixels = previous3Bits | (scrByte1 << 24) | (scrByte1 << 20) | (scrByte1 << 16)
| ((scrByte1 & 0x0C) << 12) | ((scrByte2 & 0x03) << 12)
| (scrByte2 << 8) | (scrByte2 << 4) | scrByte2;
// We now have 28 pixels (expanded from 14) in word: mask is $0F FF FF FF
// 0ppp 1111 1111 1111 11|11 1111 1111 1111
// 31 27 23 19 15 11 7 3 0
if (screenType == ST_COLOR_TV)
{
for(uint8_t i=0; i<7; i++)
{
uint8_t bitPat = (pixels & 0x7F000000) >> 24;
pixels <<= 4;
for(uint8_t j=0; j<4; j++)
{
uint8_t color = blurTable[bitPat][j];
for(uint32_t cy=8; cy<16; cy++)
{
scrBuffer[((x * 14) + (i * 4) + j) + (((y * 16) + cy) * VIRTUAL_SCREEN_WIDTH)] = palette[color];
// scrBuffer[((x * 14) + (i * 4) + j) + (((y * 16) + cy) * VIRTUAL_SCREEN_WIDTH)] = palette[color];
}
}
}
previous3Bits = pixels & 0x70000000;
}
else
{
for(int j=0; j<28; j++)
{
for(uint32_t cy=8; cy<16; cy++)
{
scrBuffer[((x * 14) + j) + (((y * 16) + cy) * VIRTUAL_SCREEN_WIDTH)] = (pixels & 0x08000000 ? pixelOn : 0xFF000000);
// scrBuffer[((x * 14) + j) + (((y * 16) + cy) * VIRTUAL_SCREEN_WIDTH)] = (pixels & 0x08000000 ? pixelOn : 0xFF000000);
}
pixels <<= 1;
}
}
}
}
}
static void RenderHiRes(uint16_t toLine/*= 192*/)
{
// NOTE: Not endian safe. !!! FIX !!! [DONE]
#if 0
uint32_t pixelOn = (screenType == ST_WHITE_MONO ? 0xFFFFFFFF : 0xFF61FF61);
#else
// Now it is. Now roll this fix into all the other places... !!! FIX !!!
// The colors are set in the 8-bit array as R G B A
uint8_t monoColors[8] = { 0xFF, 0xFF, 0xFF, 0xFF, 0x61, 0xFF, 0x61, 0xFF };
uint32_t * colorPtr = (uint32_t *)monoColors;
uint32_t pixelOn = (screenType == ST_WHITE_MONO ? colorPtr[0] : colorPtr[1]);
#endif
for(uint16_t y=0; y<toLine; y++)
{
uint16_t previousLoPixel = 0;
uint32_t previous3bits = 0;
for(uint16_t x=0; x<40; x+=2)
{
uint8_t screenByte = ram[lineAddrHiRes[y] + (displayPage2 ? 0x2000 : 0x0000) + x];
uint32_t pixels = appleHiresToMono[previousLoPixel | screenByte];
previousLoPixel = (screenByte << 2) & 0x0100;
screenByte = ram[lineAddrHiRes[y] + (displayPage2 ? 0x2000 : 0x0000) + x + 1];
uint32_t pixels2 = appleHiresToMono[previousLoPixel | screenByte];
previousLoPixel = (screenByte << 2) & 0x0100;
pixels = previous3bits | (pixels << 14) | pixels2;
// We now have 28 pixels (expanded from 14) in word: mask is $0F FF FF FF
// 0ppp 1111 1111 1111 1111 1111 1111 1111
// 31 27 23 19 15 11 7 3 0
if (screenType == ST_COLOR_TV)
{
for(uint8_t i=0; i<7; i++)
{
uint8_t bitPat = (pixels & 0x7F000000) >> 24;
pixels <<= 4;
for(uint8_t j=0; j<4; j++)
{
uint8_t color = blurTable[bitPat][j];
#if 0
//This doesn't seem to make things go any faster...
//It's the OpenGL render that's faster... Hmm...
scrBuffer[(x * 14) + (i * 4) + j + (y * VIRTUAL_SCREEN_WIDTH)] = palette[color];
#else
scrBuffer[(x * 14) + (i * 4) + j + (((y * 2) + 0) * VIRTUAL_SCREEN_WIDTH)] = palette[color];
scrBuffer[(x * 14) + (i * 4) + j + (((y * 2) + 1) * VIRTUAL_SCREEN_WIDTH)] = palette[color];
#endif
}
}
previous3bits = pixels & 0x70000000;
}
else
{
for(int j=0; j<28; j++)
{
scrBuffer[(x * 14) + j + (((y * 2) + 0) * VIRTUAL_SCREEN_WIDTH)] = (pixels & 0x08000000 ? pixelOn : 0xFF000000);
if (screenType == ST_GREEN_MONO)
pixels &= 0x07FFFFFF;
scrBuffer[(x * 14) + j + (((y * 2) + 1) * VIRTUAL_SCREEN_WIDTH)] = (pixels & 0x08000000 ? pixelOn : 0xFF000000);
pixels <<= 1;
}
}
}
}
}
static void RenderDHiRes(uint16_t toLine/*= 192*/)
{
// NOTE: Not endian safe. !!! FIX !!! [DONE]
#if 0
uint32_t pixelOn = (screenType == ST_WHITE_MONO ? 0xFFFFFFFF : 0xFF61FF61);
#else
// Now it is. Now roll this fix into all the other places... !!! FIX !!!
// The colors are set in the 8-bit array as R G B A
uint8_t monoColors[8] = { 0xFF, 0xFF, 0xFF, 0xFF, 0x61, 0xFF, 0x61, 0xFF };
uint32_t * colorPtr = (uint32_t *)monoColors;
uint32_t pixelOn = (screenType == ST_WHITE_MONO ? colorPtr[0] : colorPtr[1]);
#endif
for(uint16_t y=0; y<toLine; y++)
{
uint16_t previousLoPixel = 0;
uint32_t previous3bits = 0;
for(uint16_t x=0; x<40; x+=2)
{
uint8_t screenByte = ram[lineAddrHiRes[y] + (displayPage2 ? 0x2000 : 0x0000) + x];
uint32_t pixels = (mirrorTable[screenByte & 0x7F]) << 14;
screenByte = ram[lineAddrHiRes[y] + (displayPage2 ? 0x2000 : 0x0000) + x + 1];
pixels = pixels | (mirrorTable[screenByte & 0x7F]);
screenByte = ram2[lineAddrHiRes[y] + (displayPage2 ? 0x2000 : 0x0000) + x];
pixels = pixels | ((mirrorTable[screenByte & 0x7F]) << 21);
screenByte = ram2[lineAddrHiRes[y] + (displayPage2 ? 0x2000 : 0x0000) + x + 1];
pixels = pixels | ((mirrorTable[screenByte & 0x7F]) << 7);
pixels = previous3bits | (pixels >> 1);
// We now have 28 pixels (expanded from 14) in word: mask is $0F FF FF FF
// 0ppp 1111 1111 1111 1111 1111 1111 1111
// 31 27 23 19 15 11 7 3 0
if (screenType == ST_COLOR_TV)
{
for(uint8_t i=0; i<7; i++)
{
uint8_t bitPat = (pixels & 0x7F000000) >> 24;
pixels <<= 4;
for(uint8_t j=0; j<4; j++)
{
uint8_t color = blurTable[bitPat][j];
scrBuffer[(x * 14) + (i * 4) + j + (((y * 2) + 0) * VIRTUAL_SCREEN_WIDTH)] = palette[color];
scrBuffer[(x * 14) + (i * 4) + j + (((y * 2) + 1) * VIRTUAL_SCREEN_WIDTH)] = palette[color];
}
}
previous3bits = pixels & 0x70000000;
}
else
{
for(int j=0; j<28; j++)
{
scrBuffer[(x * 14) + j + (((y * 2) + 0) * VIRTUAL_SCREEN_WIDTH)] = (pixels & 0x08000000 ? pixelOn : 0xFF000000);
if (screenType == ST_GREEN_MONO)
pixels &= 0x07FFFFFF;
scrBuffer[(x * 14) + j + (((y * 2) + 1) * VIRTUAL_SCREEN_WIDTH)] = (pixels & 0x08000000 ? pixelOn : 0xFF000000);
pixels <<= 1;
}
}
}
}
}
void RenderVideoFrame(void)
{
//temp...
/*RenderLoRes();
RenderScreenBuffer();
return;//*/
if (textMode)
{
// There's prolly more to it than this (like 80 column text), but this'll have to do for now...
if (!col80Mode)
Render40ColumnText();
else
Render80ColumnText();
}
else
{
if (mixedMode)
{
if (hiRes)
{
RenderHiRes(160);
Render40ColumnTextLine(20);
Render40ColumnTextLine(21);
Render40ColumnTextLine(22);
Render40ColumnTextLine(23);
}
else
{
RenderLoRes(20);
Render40ColumnTextLine(20);
Render40ColumnTextLine(21);
Render40ColumnTextLine(22);
Render40ColumnTextLine(23);
}
}
else
{
if (dhires)
RenderDHiRes();
else if (hiRes)
RenderHiRes();
else
RenderLoRes();
}
}
if (msgTicks)
{
DrawString();
msgTicks--;
}
RenderScreenBuffer();
}
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