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apple2ix/src/display.c
Aaron Culliney 3120b75e00 Enforce module ctor priorities
2016-02-22 22:41:37 -08:00

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/*
* Apple // emulator for *ix
*
* This software package is subject to the GNU General Public License
* version 3 or later (your choice) as published by the Free Software
* Foundation.
*
* Copyright 1994 Alexander Jean-Claude Bottema
* Copyright 1995 Stephen Lee
* Copyright 1997, 1998 Aaron Culliney
* Copyright 1998, 1999, 2000 Michael Deutschmann
* Copyright 2013-2015 Aaron Culliney
*
*/
#include "common.h"
#include "video/video.h"
#define SCANSTEP (SCANWIDTH-12)
#define SCANDSTEP (SCANWIDTH-6)
#define DYNAMIC_SZ 11 // 7 pixels (as bytes) + 2pre + 2post
typedef enum drawpage_mode_t {
DRAWPAGE_TEXT = 1,
DRAWPAGE_HIRES,
} drawpage_mode_t;
// framebuffers
static uint8_t *video__fb = NULL;
A2Color_s colormap[256] = { { 0 } };
video_animation_s *video_animations = NULL;
video_backend_s *video_backend = NULL;
static pthread_t render_thread_id = 0;
static pthread_mutex_t video_scan_mutex = PTHREAD_MUTEX_INITIALIZER;
static uint8_t video__wider_font[0x8000] = { 0 };
static uint8_t video__font[0x4000] = { 0 };
static uint8_t video__int_font[3][0x4000] = { { 0 } }; // interface font
// Precalculated framebuffer offsets given VM addr
unsigned int video__screen_addresses[8192] = { INT_MIN };
uint8_t video__columns[8192] = { 0 };
uint8_t video__hires_even[0x800] = { 0 };
uint8_t video__hires_odd[0x800] = { 0 };
volatile unsigned long _vid_dirty = 0;
// Video constants -- sourced from AppleWin
static const bool bVideoScannerNTSC = true;
static const int kHBurstClock = 53; // clock when Color Burst starts
static const int kHBurstClocks = 4; // clocks per Color Burst duration
static const int kHClock0State = 0x18; // H[543210] = 011000
static const int kHClocks = 65; // clocks per horizontal scan (including HBL)
static const int kHPEClock = 40; // clock when HPE (horizontal preset enable) goes low
static const int kHPresetClock = 41; // clock when H state presets
static const int kHSyncClock = 49; // clock when HSync starts
static const int kHSyncClocks = 4; // clocks per HSync duration
static const int kNTSCScanLines = 262; // total scan lines including VBL (NTSC)
static const int kNTSCVSyncLine = 224; // line when VSync starts (NTSC)
static const int kPALScanLines = 312; // total scan lines including VBL (PAL)
static const int kPALVSyncLine = 264; // line when VSync starts (PAL)
static const int kVLine0State = 0x100; // V[543210CBA] = 100000000
static const int kVPresetLine = 256; // line when V state presets
static const int kVSyncLines = 4; // lines per VSync duration
uint8_t video__odd_colors[2] = { COLOR_LIGHT_PURPLE, COLOR_LIGHT_BLUE };
uint8_t video__even_colors[2] = { COLOR_LIGHT_GREEN, COLOR_LIGHT_RED };
// 40col/80col/lores/hires/dhires line offsets
unsigned short video__line_offset[TEXT_ROWS] = {
0x000, 0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380,
0x028, 0x0A8, 0x128, 0x1A8, 0x228, 0x2A8, 0x328, 0x3A8,
0x050, 0x0D0, 0x150, 0x1D0, 0x250, 0x2D0, 0x350, 0x3D0
};
uint8_t video__dhires1[256] = {
0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xb,0xc,0xd,0xe,0xf,
0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xb,0xc,0xd,0xe,0xf,
0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xb,0xc,0xd,0xe,0xf,
0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xb,0xc,0xd,0xe,0xf,
0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xb,0xc,0xd,0xe,0xf,
0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xb,0xc,0xd,0xe,0xf,
0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xb,0xc,0xd,0xe,0xf,
0x0,0x1,0x2,0x3,0x4,0x5,0x6,0x7,0x8,0x9,0xa,0xb,0xc,0xd,0xe,0xf,
};
uint8_t video__dhires2[256] = {
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x8,0x8,0x8,0x8,0x8,0x8,0x8,0x8,
0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x1,0x9,0x9,0x9,0x9,0x9,0x9,0x9,0x9,
0x2,0x2,0x2,0x2,0x2,0x2,0x2,0x2,0xa,0xa,0xa,0xa,0xa,0xa,0xa,0xa,
0x3,0x3,0x3,0x3,0x3,0x3,0x3,0x3,0xb,0xb,0xb,0xb,0xb,0xb,0xb,0xb,
0x4,0x4,0x4,0x4,0x4,0x4,0x4,0x4,0xc,0xc,0xc,0xc,0xc,0xc,0xc,0xc,
0x5,0x5,0x5,0x5,0x5,0x5,0x5,0x5,0xd,0xd,0xd,0xd,0xd,0xd,0xd,0xd,
0x6,0x6,0x6,0x6,0x6,0x6,0x6,0x6,0xe,0xe,0xe,0xe,0xe,0xe,0xe,0xe,
0x7,0x7,0x7,0x7,0x7,0x7,0x7,0x7,0xf,0xf,0xf,0xf,0xf,0xf,0xf,0xf,
};
// forward decls of VM entry points
void video__write_2e_text0(uint16_t, uint8_t);
void video__write_2e_text0_mixed(uint16_t, uint8_t);
void video__write_2e_text1(uint16_t, uint8_t);
void video__write_2e_text1_mixed(uint16_t, uint8_t);
void video__write_2e_odd0(uint16_t, uint8_t);
void video__write_2e_even0(uint16_t, uint8_t);
void video__write_2e_odd0_mixed(uint16_t, uint8_t);
void video__write_2e_even0_mixed(uint16_t, uint8_t);
void video__write_2e_odd1(uint16_t, uint8_t);
void video__write_2e_even1(uint16_t, uint8_t);
void video__write_2e_odd1_mixed(uint16_t, uint8_t);
void video__write_2e_even1_mixed(uint16_t, uint8_t);
// ----------------------------------------------------------------------------
// Initialization routines
static void _initialize_dhires_values(void) {
for (unsigned int i = 0; i < 0x80; i++) {
video__dhires1[i+0x80] = video__dhires1[i];
video__dhires2[i+0x80] = video__dhires2[i];
}
}
static void _initialize_hires_values(void) {
// precalculate colors for all the 256*8 bit combinations. */
for (unsigned int value = 0x00; value <= 0xFF; value++) {
for (unsigned int e = value*8, last_not_black=0, v=value, b=0; b < 7; b++, v >>= 1, e++) {
if (v & 1) {
if (last_not_black) {
video__hires_even[e] = COLOR_LIGHT_WHITE;
video__hires_odd[e] = COLOR_LIGHT_WHITE;
if (b > 0)
{
video__hires_even[e-1] = COLOR_LIGHT_WHITE,
video__hires_odd [e-1] = COLOR_LIGHT_WHITE;
}
} else {
if (b & 1) {
if (value & 0x80) {
video__hires_even[e] = COLOR_LIGHT_RED;
video__hires_odd [e] = COLOR_LIGHT_BLUE;
} else {
video__hires_even[e] = COLOR_LIGHT_GREEN;
video__hires_odd [e] = COLOR_LIGHT_PURPLE;
}
} else {
if (value & 0x80) {
video__hires_even[e] = COLOR_LIGHT_BLUE;
video__hires_odd [e] = COLOR_LIGHT_RED;
} else {
video__hires_even[e] = COLOR_LIGHT_PURPLE;
video__hires_odd [e] = COLOR_LIGHT_GREEN;
}
}
}
last_not_black = 1;
} else {
video__hires_even[e] = COLOR_BLACK,
video__hires_odd [e] = COLOR_BLACK,
last_not_black = 0;
}
}
}
if (color_mode == COLOR_NONE) {
for (unsigned int value = 0x00; value <= 0xFF; value++) {
for (unsigned int b = 0, e = value * 8; b < 7; b++, e++) {
if (video__hires_even[e] != COLOR_BLACK) {
video__hires_even[e] = COLOR_LIGHT_WHITE;
}
if (video__hires_odd[e] != COLOR_BLACK) {
video__hires_odd[e] = COLOR_LIGHT_WHITE;
}
}
}
} else if (color_mode == COLOR_INTERP) {
for (unsigned int value = 0x00; value <= 0xFF; value++) {
for (unsigned int b=1, e=value*8 + 1; b <= 5; b += 2, e += 2) {
if (video__hires_even[e] == COLOR_BLACK) {
if (video__hires_even[e-1] != COLOR_BLACK &&
video__hires_even[e+1] != COLOR_BLACK &&
video__hires_even[e-1] != COLOR_LIGHT_WHITE &&
video__hires_even[e+1] != COLOR_LIGHT_WHITE)
{
video__hires_even[e] = video__hires_even[e-1];
}
else if (
video__hires_even[e-1] != COLOR_BLACK &&
video__hires_even[e+1] != COLOR_BLACK &&
video__hires_even[e-1] != COLOR_LIGHT_WHITE &&
video__hires_even[e+1] == COLOR_LIGHT_WHITE)
{
video__hires_even[e] = video__hires_even[e-1];
}
else if (
video__hires_even[e-1] != COLOR_BLACK &&
video__hires_even[e+1] != COLOR_BLACK &&
video__hires_even[e-1] == COLOR_LIGHT_WHITE &&
video__hires_even[e+1] != COLOR_LIGHT_WHITE)
{
video__hires_even[e] = video__hires_even[e+1];
}
else if (
video__hires_even[e-1] == COLOR_LIGHT_WHITE &&
video__hires_even[e+1] == COLOR_LIGHT_WHITE)
{
video__hires_even[e] = (value & 0x80) ? COLOR_LIGHT_BLUE : COLOR_LIGHT_PURPLE;
}
}
if (video__hires_odd[e] == COLOR_BLACK) {
if (video__hires_odd[e-1] != COLOR_BLACK &&
video__hires_odd[e+1] != COLOR_BLACK &&
video__hires_odd[e-1] != COLOR_LIGHT_WHITE &&
video__hires_odd[e+1] != COLOR_LIGHT_WHITE)
{
video__hires_odd[e] = video__hires_odd[e-1];
}
else if (
video__hires_odd[e-1] != COLOR_BLACK &&
video__hires_odd[e+1] != COLOR_BLACK &&
video__hires_odd[e-1] != COLOR_LIGHT_WHITE &&
video__hires_odd[e+1] == COLOR_LIGHT_WHITE)
{
video__hires_odd[e] = video__hires_odd[e-1];
}
else if (
video__hires_odd[e-1] != COLOR_BLACK &&
video__hires_odd[e+1] != COLOR_BLACK &&
video__hires_odd[e-1] == COLOR_LIGHT_WHITE &&
video__hires_odd[e+1] != COLOR_LIGHT_WHITE)
{
video__hires_odd[e] = video__hires_odd[e+1];
}
else if (
video__hires_odd[e-1] == COLOR_LIGHT_WHITE &&
video__hires_odd[e+1] == COLOR_LIGHT_WHITE)
{
video__hires_odd[e] = (value & 0x80) ? COLOR_LIGHT_RED : COLOR_LIGHT_GREEN;
}
}
}
for (unsigned int b = 0, e = value * 8; b <= 6; b += 2, e += 2) {
if (video__hires_even[ e ] == COLOR_BLACK) {
if (b > 0 && b < 6) {
if (video__hires_even[e-1] != COLOR_BLACK &&
video__hires_even[e+1] != COLOR_BLACK &&
video__hires_even[e-1] != COLOR_LIGHT_WHITE &&
video__hires_even[e+1] != COLOR_LIGHT_WHITE)
{
video__hires_even[e] = video__hires_even[e-1];
}
else if (
video__hires_even[e-1] != COLOR_BLACK &&
video__hires_even[e+1] != COLOR_BLACK &&
video__hires_even[e-1] != COLOR_LIGHT_WHITE &&
video__hires_even[e+1] == COLOR_LIGHT_WHITE)
{
video__hires_even[e] = video__hires_even[e-1];
}
else if (
video__hires_even[e-1] != COLOR_BLACK &&
video__hires_even[e+1] != COLOR_BLACK &&
video__hires_even[e-1] == COLOR_LIGHT_WHITE &&
video__hires_even[e+1] != COLOR_LIGHT_WHITE)
{
video__hires_even[e] = video__hires_even[e+1];
}
else if (
video__hires_even[e-1] == COLOR_LIGHT_WHITE &&
video__hires_even[e+1] == COLOR_LIGHT_WHITE)
{
video__hires_even[e] = (value & 0x80) ? COLOR_LIGHT_RED : COLOR_LIGHT_GREEN;
}
}
}
if (video__hires_odd[e] == COLOR_BLACK) {
if (b > 0 && b < 6) {
if (video__hires_odd[e-1] != COLOR_BLACK &&
video__hires_odd[e+1] != COLOR_BLACK &&
video__hires_odd[e-1] != COLOR_LIGHT_WHITE &&
video__hires_odd[e+1] != COLOR_LIGHT_WHITE)
{
video__hires_odd[e] = video__hires_odd[e-1];
}
else if (
video__hires_odd[e-1] != COLOR_BLACK &&
video__hires_odd[e+1] != COLOR_BLACK &&
video__hires_odd[e-1] != COLOR_LIGHT_WHITE &&
video__hires_odd[e+1] == COLOR_LIGHT_WHITE)
{
video__hires_odd[e] = video__hires_odd[e-1];
}
else if (
video__hires_odd[e-1] != COLOR_BLACK &&
video__hires_odd[e+1] != COLOR_BLACK &&
video__hires_odd[e-1] == COLOR_LIGHT_WHITE &&
video__hires_odd[e+1] != COLOR_LIGHT_WHITE)
{
video__hires_odd[e] = video__hires_odd[e+1];
}
else if (
video__hires_odd[e-1] == COLOR_LIGHT_WHITE &&
video__hires_odd[e+1] == COLOR_LIGHT_WHITE)
{
video__hires_odd[e] = (value & 0x80) ? COLOR_LIGHT_BLUE : COLOR_LIGHT_PURPLE;
}
}
}
}
}
}
}
static void _initialize_row_col_tables(void) {
for (unsigned int y = 0; y < TEXT_ROWS; y++) {
for (unsigned int y2 = 0; y2 < FONT_GLYPH_Y; y2++) {
for (unsigned int x = 0; x < 40; x++) {
video__screen_addresses[video__line_offset[y] + (0x400*y2) + x] = ((y*FONT_HEIGHT_PIXELS + 2*y2) * SCANWIDTH) + (x*FONT_WIDTH_PIXELS) + _INTERPOLATED_PIXEL_ADJUSTMENT_PRE;
video__columns [video__line_offset[y] + (0x400*y2) + x] = (uint8_t)x;
}
}
}
for (unsigned int i = 0; i < 8192; i++) {
assert(video__screen_addresses[i] != INT_MIN);
}
}
static void _initialize_tables_video(void) {
// initialize text/lores & hires graphics routines
for (unsigned int y = 0; y < TEXT_ROWS; y++) {
for (unsigned int x = 0; x < TEXT_COLS; x++) {
unsigned int idx = video__line_offset[y] + x + 0x400;
// text/lores pages
if (y < 20) {
cpu65_vmem_w[idx ] = video__write_2e_text0;
cpu65_vmem_w[idx+0x400] = video__write_2e_text1;
} else {
cpu65_vmem_w[idx ] = video__write_2e_text0_mixed;
cpu65_vmem_w[idx+0x400] = video__write_2e_text1_mixed;
}
// hires/dhires pages
for (unsigned int i = 0; i < 8; i++) {
idx = 0x2000 + video__line_offset[ y ] + (0x400*i) + x;
if (y < 20) {
if (x & 1) {
cpu65_vmem_w[idx ] = video__write_2e_odd0;
cpu65_vmem_w[idx+0x2000] = video__write_2e_odd1;
} else {
cpu65_vmem_w[idx ] = video__write_2e_even0;
cpu65_vmem_w[idx+0x2000] = video__write_2e_even1;
}
} else {
if (x & 1) {
cpu65_vmem_w[idx ] = video__write_2e_odd0_mixed;
cpu65_vmem_w[idx+0x2000] = video__write_2e_odd1_mixed;
} else {
cpu65_vmem_w[idx ] = video__write_2e_even0_mixed;
cpu65_vmem_w[idx+0x2000] = video__write_2e_even1_mixed;
}
}
}
}
}
}
static void _initialize_color() {
unsigned char col2[ 3 ] = { 255,255,255 };
/* align the palette for hires graphics */
for (unsigned int i = 0; i < 8; i++) {
for (unsigned int j = 0; j < 3; j++) {
unsigned int c = 0;
c = (i & 1) ? col2[ j ] : 0;
colormap[ j+i*3+32].red = c;
c = (i & 2) ? col2[ j ] : 0;
colormap[ j+i*3+32].green = c;
c = (i & 4) ? col2[ j ] : 0;
colormap[ j+i*3+32].blue = c;
}
}
colormap[ COLOR_FLASHING_BLACK].red = 0;
colormap[ COLOR_FLASHING_BLACK].green = 0;
colormap[ COLOR_FLASHING_BLACK].blue = 0;
colormap[ COLOR_LIGHT_WHITE].red = 255;
colormap[ COLOR_LIGHT_WHITE].green = 255;
colormap[ COLOR_LIGHT_WHITE].blue = 255;
colormap[ COLOR_FLASHING_WHITE].red = 255;
colormap[ COLOR_FLASHING_WHITE].green = 255;
colormap[ COLOR_FLASHING_WHITE].blue = 255;
colormap[0x00].red = 0; colormap[0x00].green = 0;
colormap[0x00].blue = 0; /* Black */
colormap[0x10].red = 195; colormap[0x10].green = 0;
colormap[0x10].blue = 48; /* Magenta */
colormap[0x20].red = 0; colormap[0x20].green = 0;
colormap[0x20].blue = 130; /* Dark Blue */
colormap[0x30].red = 166; colormap[0x30].green = 52;
colormap[0x30].blue = 170; /* Purple */
colormap[0x40].red = 0; colormap[0x40].green = 146;
colormap[0x40].blue = 0; /* Dark Green */
colormap[0x50].red = 105; colormap[0x50].green = 105;
colormap[0x50].blue = 105; /* Dark Grey*/
colormap[0x60].red = 24; colormap[0x60].green = 113;
colormap[0x60].blue = 255; /* Medium Blue */
colormap[0x70].red = 12; colormap[0x70].green = 190;
colormap[0x70].blue = 235; /* Light Blue */
colormap[0x80].red = 150; colormap[0x80].green = 85;
colormap[0x80].blue = 40; /* Brown */
colormap[0x90].red = 255; colormap[0xa0].green = 24;
colormap[0x90].blue = 44; /* Orange */
colormap[0xa0].red = 150; colormap[0xa0].green = 170;
colormap[0xa0].blue = 170; /* Light Gray */
colormap[0xb0].red = 255; colormap[0xb0].green = 158;
colormap[0xb0].blue = 150; /* Pink */
colormap[0xc0].red = 0; colormap[0xc0].green = 255;
colormap[0xc0].blue = 0; /* Green */
colormap[0xd0].red = 255; colormap[0xd0].green = 255;
colormap[0xd0].blue = 0; /* Yellow */
colormap[0xe0].red = 130; colormap[0xe0].green = 255;
colormap[0xe0].blue = 130; /* Aqua */
colormap[0xf0].red = 255; colormap[0xf0].green = 255;
colormap[0xf0].blue = 255; /* White */
/* mirror of lores colormap optimized for dhires code */
colormap[0x00].red = 0; colormap[0x00].green = 0;
colormap[0x00].blue = 0; /* Black */
colormap[0x08].red = 195; colormap[0x08].green = 0;
colormap[0x08].blue = 48; /* Magenta */
colormap[0x01].red = 0; colormap[0x01].green = 0;
colormap[0x01].blue = 130; /* Dark Blue */
colormap[0x09].red = 166; colormap[0x09].green = 52;
colormap[0x09].blue = 170; /* Purple */
colormap[0x02].red = 0; colormap[0x02].green = 146;
colormap[0x02].blue = 0; /* Dark Green */
colormap[0x0a].red = 105; colormap[0x0a].green = 105;
colormap[0x0a].blue = 105; /* Dark Grey*/
colormap[0x03].red = 24; colormap[0x03].green = 113;
colormap[0x03].blue = 255; /* Medium Blue */
colormap[0x0b].red = 12; colormap[0x0b].green = 190;
colormap[0x0b].blue = 235; /* Light Blue */
colormap[0x04].red = 150; colormap[0x04].green = 85;
colormap[0x04].blue = 40; /* Brown */
colormap[0x0c].red = 255; colormap[0x0c].green = 24;
colormap[0x0c].blue = 44; /* Orange */
colormap[0x05].red = 150; colormap[0x05].green = 170;
colormap[0x05].blue = 170; /* Light Gray */
colormap[0x0d].red = 255; colormap[0x0d].green = 158;
colormap[0x0d].blue = 150; /* Pink */
colormap[0x06].red = 0; colormap[0x06].green = 255;
colormap[0x06].blue = 0; /* Green */
colormap[0x0e].red = 255; colormap[0x0e].green = 255;
colormap[0x0e].blue = 0; /* Yellow */
colormap[0x07].red = 130; colormap[0x07].green = 255;
colormap[0x07].blue = 130; /* Aqua */
colormap[0x0f].red = 255; colormap[0x0f].green = 255;
colormap[0x0f].blue = 255; /* White */
#if USE_RGBA4444
for (unsigned int i=0; i<256; i++) {
colormap[i].red = (colormap[i].red >>4);
colormap[i].green = (colormap[i].green >>4);
colormap[i].blue = (colormap[i].blue >>4);
}
#endif
}
void video_reset(void) {
_initialize_hires_values();
_initialize_tables_video();
video_setDirty(A2_DIRTY_FLAG);
}
void video_loadfont(int first, int quantity, const uint8_t *data, int mode) {
uint8_t fg = 0;
uint8_t bg = 0;
switch (mode) {
case 2:
fg = COLOR_BLACK;
bg = COLOR_LIGHT_WHITE;
break;
case 3:
fg = COLOR_FLASHING_WHITE;
bg = COLOR_FLASHING_BLACK;
break;
default:
fg = COLOR_LIGHT_WHITE;
bg = COLOR_BLACK;
break;
}
unsigned int i = quantity * 8;
while (i--) {
unsigned int j = 8;
uint8_t x = data[i];
while (j--) {
uint8_t y = (x & 128) ? fg : bg;
video__wider_font[(first << 7) + (i << 4) + (j << 1)] = video__wider_font[(first << 7) + (i << 4) + (j << 1) + 1] =
video__font[(first << 6) + (i << 3) + j] = y;
x <<= 1;
}
}
}
static void _loadfont_int(int first, int quantity, const uint8_t *data) {
unsigned int i = quantity * 8;
while (i--) {
unsigned int j = 8;
uint8_t x = data[i];
while (j--) {
unsigned int y = (first << 6) + (i << 3) + j;
if (x & 128) {
video__int_font[0][y] = COLOR_LIGHT_GREEN;
video__int_font[1][y] = COLOR_LIGHT_GREEN;
video__int_font[2][y] = COLOR_LIGHT_RED;
} else {
video__int_font[0][y] = COLOR_BLACK;
video__int_font[1][y] = COLOR_MEDIUM_BLUE;
video__int_font[2][y] = COLOR_BLACK;
}
x <<= 1;
}
}
}
static void _initialize_interface_fonts(void) {
_loadfont_int(0x00,0x40,ucase_glyphs);
_loadfont_int(0x40,0x20,ucase_glyphs);
_loadfont_int(0x60,0x20,lcase_glyphs);
_loadfont_int(0x80,0x40,ucase_glyphs);
_loadfont_int(0xC0,0x20,ucase_glyphs);
_loadfont_int(0xE0,0x20,lcase_glyphs);
_loadfont_int(MOUSETEXT_BEGIN,0x20,mousetext_glyphs);
_loadfont_int(ICONTEXT_BEGIN,0x20,interface_glyphs);
}
// ----------------------------------------------------------------------------
// lores/char plotting routines
static inline void _plot_char40(uint8_t **d, uint8_t **s) {
*((uint32_t *)(*d)) = *((uint32_t *)(*s));
*d += 4, *s += 4;
*((uint32_t *)(*d)) = *((uint32_t *)(*s));
*d += 4, *s += 4;
*((uint32_t *)(*d)) = *((uint32_t *)(*s));
*d += 4, *s += 4;
*((uint16_t *)(*d)) = *((uint16_t *)(*s));
*d += SCANSTEP, *s -= 12;
*((uint32_t *)(*d)) = *((uint32_t *)(*s));
*d += 4, *s += 4;
*((uint32_t *)(*d)) = *((uint32_t *)(*s));
*d += 4, *s += 4;
*((uint32_t *)(*d)) = *((uint32_t *)(*s));
*d += 4, *s += 4;
*((uint16_t *)(*d)) = *((uint16_t *)(*s));
*d += SCANSTEP, *s += 4;
}
static inline void _plot_char80(uint8_t **d, uint8_t **s, const unsigned int fb_width) {
// FIXME : this is implicitly scaling at FONT_GLYPH_SCALE_Y ... make it explicit
*((uint32_t *)(*d)) = *((uint32_t *)(*s));
*d += 4, *s += 4;
*((uint16_t *)(*d)) = *((uint16_t *)(*s));
*d += 2, *s += 2;
*((uint8_t *)(*d)) = *((uint8_t *)(*s));
*d += fb_width-6, *s -= 6;
*((uint32_t *)(*d)) = *((uint32_t *)(*s));
*d += 4, *s += 4;
*((uint16_t *)(*d)) = *((uint16_t *)(*s));
*d += 2, *s += 2;
*((uint8_t *)(*d)) = *((uint8_t *)(*s));
*d += fb_width-6, *s += 2;
}
static inline void _plot_lores40(uint8_t **d, const uint32_t val) {
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint16_t *)(*d)) = (uint16_t)(val & 0xffff);
*d += SCANSTEP;
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint16_t *)(*d)) = (uint16_t)(val & 0xffff);
}
static inline void _plot_lores80(uint8_t **d, const uint32_t val) {
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint16_t *)(*d)) = (uint16_t)val;
*d += 2;
*((uint8_t *)(*d)) = (uint8_t)val;
*d += SCANDSTEP;
*((uint32_t *)(*d)) = val;
*d += 4;
*((uint16_t *)(*d)) = (uint16_t)val;
*d += 2;
*((uint8_t *)(*d)) = (uint8_t)val;
}
static inline void __plot_character40(const unsigned int font_off, uint8_t *fb_ptr) {
uint8_t *font_ptr = video__wider_font+font_off;
_plot_char40(/*dst*/&fb_ptr, /*src*/&font_ptr);
_plot_char40(/*dst*/&fb_ptr, /*src*/&font_ptr);
_plot_char40(/*dst*/&fb_ptr, /*src*/&font_ptr);
_plot_char40(/*dst*/&fb_ptr, /*src*/&font_ptr);
_plot_char40(/*dst*/&fb_ptr, /*src*/&font_ptr);
_plot_char40(/*dst*/&fb_ptr, /*src*/&font_ptr);
_plot_char40(/*dst*/&fb_ptr, /*src*/&font_ptr);
_plot_char40(/*dst*/&fb_ptr, /*src*/&font_ptr);
}
static void _plot_character40(uint16_t off, int page, int bank) {
uint16_t base = page ? 0x0800 : 0x0400;
uint16_t ea = base+off;
uint8_t b = apple_ii_64k[bank][ea];
__plot_character40(b<<7/* *128 */, video__fb+video__screen_addresses[off]);
}
static inline void __plot_character80(const unsigned int font_off, uint8_t *fb_ptr) {
uint8_t *font_ptr = video__font+font_off;
_plot_char80(/*dst*/&fb_ptr, /*src*/&font_ptr, SCANWIDTH);
_plot_char80(/*dst*/&fb_ptr, /*src*/&font_ptr, SCANWIDTH);
_plot_char80(/*dst*/&fb_ptr, /*src*/&font_ptr, SCANWIDTH);
_plot_char80(/*dst*/&fb_ptr, /*src*/&font_ptr, SCANWIDTH);
_plot_char80(/*dst*/&fb_ptr, /*src*/&font_ptr, SCANWIDTH);
_plot_char80(/*dst*/&fb_ptr, /*src*/&font_ptr, SCANWIDTH);
_plot_char80(/*dst*/&fb_ptr, /*src*/&font_ptr, SCANWIDTH);
_plot_char80(/*dst*/&fb_ptr, /*src*/&font_ptr, SCANWIDTH);
}
static void _plot_character80(uint16_t off, int page, int bank) {
uint16_t base = page ? 0x0800 : 0x0400;
uint16_t ea = base+off;
{
uint8_t b = apple_ii_64k[1][ea];
__plot_character80(b<<6/* *64 */, video__fb+video__screen_addresses[off]);
}
{
uint8_t b = apple_ii_64k[0][ea];
__plot_character80(b<<6/* *64 */, video__fb+video__screen_addresses[off]+7);
}
}
static inline void __plot_block40(const uint8_t val, uint8_t *fb_ptr) {
uint8_t color = (val & 0x0F) << 4;
uint32_t val32 = (color << 24) | (color << 16) | (color << 8) | color;
_plot_lores40(/*dst*/&fb_ptr, val32);
fb_ptr += SCANSTEP;
_plot_lores40(/*dst*/&fb_ptr, val32);
fb_ptr += SCANSTEP;
_plot_lores40(/*dst*/&fb_ptr, val32);
fb_ptr += SCANSTEP;
_plot_lores40(/*dst*/&fb_ptr, val32);
fb_ptr += SCANSTEP;
color = val & 0xF0;
val32 = (color << 24) | (color << 16) | (color << 8) | color;
_plot_lores40(/*dst*/&fb_ptr, val32);
fb_ptr += SCANSTEP;
_plot_lores40(/*dst*/&fb_ptr, val32);
fb_ptr += SCANSTEP;
_plot_lores40(/*dst*/&fb_ptr, val32);
fb_ptr += SCANSTEP;
_plot_lores40(/*dst*/&fb_ptr, val32);
}
static void _plot_block40(uint16_t off, int page, int bank) {
uint16_t base = page ? 0x0800 : 0x0400;
uint16_t ea = base+off;
uint8_t b = apple_ii_64k[bank][ea];
__plot_block40(b, video__fb+video__screen_addresses[off]);
}
static inline void __plot_block80(const uint8_t val, uint8_t *fb_ptr) {
uint8_t color = (val & 0x0F) << 4;
uint32_t val32 = (color << 24) | (color << 16) | (color << 8) | color;
_plot_lores80(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_lores80(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_lores80(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_lores80(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
color = val & 0xF0;
val32 = (color << 24) | (color << 16) | (color << 8) | color;
_plot_lores80(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_lores80(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_lores80(/*dst*/&fb_ptr, val32);
fb_ptr += SCANDSTEP;
_plot_lores80(/*dst*/&fb_ptr, val32);
}
static inline uint8_t __shift_block80(uint8_t b) {
// plot even half-block from auxmem, rotate nybbles to match color (according to UTAIIe: 8-29)
uint8_t b0 = (b & 0x0F);
uint8_t b1 = (b & 0xF0) >> 4;
uint8_t rot0 = ((b0 & 0x8) >> 3);
uint8_t rot1 = ((b1 & 0x8) >> 3);
b0 = (((b0<<5) | (rot0<<4)) >> 4);
b1 = ((b1<<5) | (rot1<<4));
b = b0 | b1;
return b;
}
static void _plot_block80(uint16_t off, int page, int bank) {
uint16_t base = page ? 0x0800 : 0x0400;
uint16_t ea = base+off;
#warning FIXME TODO INVESTIGATE : ... does RAMRD/80STORE/PAGE2 affect load order here?
// plot even half-block from auxmem, rotate nybbles to match color (according to UTAIIe)
{
uint8_t b = apple_ii_64k[1][ea];
b = __shift_block80(b);
uint8_t *fb = video__fb+video__screen_addresses[off];
__plot_block80(b, fb);
}
// plot odd half-block from main mem
{
uint8_t b = apple_ii_64k[0][ea];
uint8_t *fb = video__fb+video__screen_addresses[off] + 7;
__plot_block80(b, fb);
}
}
static void (*_textpage_plotter(uint32_t currswitches, uint32_t txtflags))(uint16_t, int, int) {
void (*plotFn)(uint16_t, int, int) = NULL;
if (currswitches & txtflags) {
plotFn = (currswitches & SS_80COL) ? _plot_character80 : _plot_character40;
} else {
assert(!(currswitches & SS_HIRES) && "must be lores graphics or programmer error");
if (!(currswitches & SS_80COL)) {
plotFn = _plot_block40;
if (!(currswitches & SS_DHIRES)) {
// LORES40 ...
} else {
// TODO : abnormal LORES output. See UTAIIe : 8-28
}
} else {
if (currswitches & SS_DHIRES) {
// LORES80 ...
plotFn = _plot_block80;
} else {
/* ??? */
RELEASE_LOG("!!!!!!!!!!!! what mode is this? !!!!!!!!!!!!");
plotFn = _plot_block40;
#warning FIXME TODO ... verify this lores40/lores80 mode ...
}
}
}
return plotFn;
}
static inline drawpage_mode_t _currentMainMode(uint32_t currswitches) {
if (currswitches & SS_TEXT) {
return DRAWPAGE_TEXT;
} else {
if (currswitches & SS_HIRES) {
return DRAWPAGE_HIRES;
} else {
return DRAWPAGE_TEXT; // (LORES)
}
}
}
static inline drawpage_mode_t _currentMixedMode(uint32_t currswitches) {
if (currswitches & (SS_TEXT|SS_MIXED)) {
return DRAWPAGE_TEXT;
} else {
if (currswitches & SS_HIRES) {
return DRAWPAGE_HIRES;
} else {
return DRAWPAGE_TEXT; // (LORES)
}
}
}
GLUE_C_WRITE(video__write_2e_text0)
{
base_textwrt[ea] = b;
drawpage_mode_t mode = _currentMainMode(softswitches);
if (mode == DRAWPAGE_HIRES) {
return;
}
if (!(softswitches & SS_PAGE2)) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_text0_mixed)
{
base_textwrt[ea] = b;
drawpage_mode_t mode = _currentMixedMode(softswitches);
if (mode == DRAWPAGE_HIRES) {
return;
}
if (!(softswitches & SS_PAGE2)) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_text1)
{
base_ramwrt[ea] = b;
drawpage_mode_t mode = _currentMainMode(softswitches);
if (mode == DRAWPAGE_HIRES) {
return;
}
if (softswitches & SS_PAGE2) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_text1_mixed)
{
base_ramwrt[ea] = b;
drawpage_mode_t mode = _currentMixedMode(softswitches);
if (mode == DRAWPAGE_HIRES) {
return;
}
if (softswitches & SS_PAGE2) {
video_setDirty(A2_DIRTY_FLAG);
}
}
// ----------------------------------------------------------------------------
// Classic interface and printing HUD messages
void interface_plotChar(uint8_t *fboff, int fb_pix_width, interface_colorscheme_t cs, uint8_t c) {
uint8_t *src = video__int_font[cs] + c * (FONT_GLYPH_X*FONT_GLYPH_Y);
_plot_char80(&fboff, &src, fb_pix_width);
_plot_char80(&fboff, &src, fb_pix_width);
_plot_char80(&fboff, &src, fb_pix_width);
_plot_char80(&fboff, &src, fb_pix_width);
_plot_char80(&fboff, &src, fb_pix_width);
_plot_char80(&fboff, &src, fb_pix_width);
_plot_char80(&fboff, &src, fb_pix_width);
_plot_char80(&fboff, &src, fb_pix_width);
}
// ----------------------------------------------------------------------------
// Double-HIRES (HIRES80) graphics
static inline void __plot_hires80_pixels(uint8_t idx, uint8_t *fb_ptr) {
uint8_t b1 = video__dhires1[idx];
uint8_t b2 = video__dhires2[idx];
uint32_t b = (b2<<24) | (b1<<8);
*((uint32_t *)fb_ptr) = b;
*((uint32_t *)(fb_ptr+SCANWIDTH)) = b;
}
static inline void __plot_hires80(uint16_t base, uint16_t ea) {
ea &= ~0x1;
uint16_t memoff = ea - base;
uint8_t *fb_ptr = video__fb+video__screen_addresses[memoff];
uint8_t col = video__columns[memoff];
uint8_t b0 = 0x0;
uint8_t b1 = 0x0;
uint32_t b = 0x0;
if (col) {
b0 = apple_ii_64k[0][ea-1];
b1 = apple_ii_64k[1][ea];
b0 &= ~0x80;
b0 = (b1<<4)|(b0>>3);
__plot_hires80_pixels(b0, fb_ptr-4);
}
b1 = apple_ii_64k[1][ea+2];
b = (b1<<28);
b0 = apple_ii_64k[0][ea+1];
b0 &= ~0x80;
b |= (b0<<21);
b1 = apple_ii_64k[1][ea+1];
b1 &= ~0x80;
b |= (b1<<14);
b0 = apple_ii_64k[0][ea];
b0 &= ~0x80;
b |= (b0<<7);
b1 = apple_ii_64k[1][ea];
b1 &= ~0x80;
b |= b1;
// 00000001 11111122 22222333 3333xxxx
__plot_hires80_pixels(b, fb_ptr);
b >>= 4;
fb_ptr += 4;
__plot_hires80_pixels(b, fb_ptr);
b >>= 4;
fb_ptr += 4;
__plot_hires80_pixels(b, fb_ptr);
b >>= 4;
fb_ptr += 4;
__plot_hires80_pixels(b, fb_ptr);
b >>= 4;
fb_ptr += 4;
__plot_hires80_pixels(b, fb_ptr);
b >>= 4;
fb_ptr += 4;
__plot_hires80_pixels(b, fb_ptr);
b >>= 4;
fb_ptr += 4;
__plot_hires80_pixels(b, fb_ptr);
}
static void _plot_hires80(uint16_t off, int page, int bank, bool is_even) {
uint16_t base = page ? 0x4000 : 0x2000;
uint16_t ea = base+off;
__plot_hires80(base, ea);
}
// ----------------------------------------------------------------------------
// Hires GRaphics
static inline void _calculate_interp_color(uint8_t *color_buf, const unsigned int idx, const uint8_t *interp_base, const uint16_t ea) {
if (color_buf[idx] != 0x0) {
return;
}
uint8_t pixR = color_buf[idx+1];
if (pixR == 0x0) {
return;
}
uint8_t pixL = color_buf[idx-1];
if (pixL == 0x0) {
return;
}
// Calculates the color at the edge of interpolated bytes: called 4 times in little endian order (...7 0...7 0...)
if (pixL == COLOR_LIGHT_WHITE) {
if (pixR == COLOR_LIGHT_WHITE) {
pixL = apple_ii_64k[0][ea];
color_buf[idx] = interp_base[pixL>>7];
} else {
color_buf[idx] = pixR;
}
} else {
color_buf[idx] = pixL;
}
}
static inline void _plot_hires_pixels(uint8_t *dst, const uint8_t *src) {
for (unsigned int i=2; i; i--) {
for (unsigned int j=DYNAMIC_SZ-1; j; j--) {
uint16_t pix = *src;
pix = ((pix<<8) | pix);
*((uint16_t *)dst) = pix;
++src;
dst+=2;
}
dst += (SCANWIDTH-18);
src -= DYNAMIC_SZ-2;
}
}
static void _plot_hires40(uint16_t off, int page, int bank, bool is_even) {
uint16_t base = page ? 0x4000 : 0x2000;
uint16_t ea = base+off;
uint8_t b = apple_ii_64k[bank][ea];
uint8_t *fb_ptr = video__fb+video__screen_addresses[off];
uint8_t _buf[DYNAMIC_SZ] = { 0 };
uint8_t *color_buf = (uint8_t *)_buf; // <--- work around for -Wstrict-aliasing
uint8_t *apple2_vmem = (uint8_t *)apple_ii_64k[bank];
uint8_t *hires_ptr = NULL;
if (is_even) {
hires_ptr = (uint8_t *)&video__hires_even[b<<3];
} else {
hires_ptr = (uint8_t *)&video__hires_odd[b<<3];
}
*((uint32_t *)&color_buf[2]) = *((uint32_t *)(hires_ptr+0));
*((uint16_t *)&color_buf[6]) = *((uint16_t *)(hires_ptr+4));
*((uint8_t *)&color_buf[8]) = *((uint8_t *)(hires_ptr+6));
hires_ptr = NULL;
// copy adjacent pixel bytes
*((uint16_t *)&color_buf[0]) = *((uint16_t *)(fb_ptr-3));
*((uint16_t *)&color_buf[DYNAMIC_SZ-2]) = *((uint16_t *)(fb_ptr+15));
// %eax = +8
if (color_mode != COLOR_NONE) {
uint8_t *hires_altbase = NULL;
if (is_even) {
hires_altbase = (uint8_t *)&video__hires_odd[0];
} else {
hires_altbase = (uint8_t *)&video__hires_even[0];
}
// if right-side color is not black, re-calculate edge values
if (color_buf[DYNAMIC_SZ-2] & 0xff) {
uint16_t pix16 = *((uint16_t *)(apple2_vmem+ea));
if ((pix16 & 0x100) && (pix16 & 0x40)) {
*((uint16_t *)&color_buf[DYNAMIC_SZ-3]) = (uint16_t)0x3737;// COLOR_LIGHT_WHITE
} else {
// PB_black0:
pix16 >>= 8;
color_buf[DYNAMIC_SZ-2] = hires_altbase[pix16<<3];
}
}
// if left-side color is not black, re-calculate edge values
if (color_buf[1] & 0xff) {
uint16_t pix16 = *((uint16_t *)(apple2_vmem+ea-1));
if ((pix16 & 0x100) && (pix16 & 0x40)) {
*((uint16_t *)&color_buf[1]) = (uint16_t)0x3737;// COLOR_LIGHT_WHITE
} else {
// PB_black1:
pix16 &= 0xFF;
color_buf[1] = hires_altbase[(pix16<<3)+6];
}
}
if (color_mode == COLOR_INTERP) {
uint8_t *interp_base = NULL;
uint8_t *interp_altbase = NULL;
if (is_even) {
interp_base = (uint8_t *)&video__even_colors[0];
interp_altbase = (uint8_t *)&video__odd_colors[0];
} else {
interp_base = (uint8_t *)&video__odd_colors[0];
interp_altbase = (uint8_t *)&video__even_colors[0];
}
// calculate interpolated/bleed colors
// NOTE that this doesn't check under/overflow of ea (for example at 0x2000, 0x4000, 0x3FFF, 0x5FFF)
// ... but don't think this really matters much here =P
_calculate_interp_color(color_buf, 1, interp_altbase, ea-1);
_calculate_interp_color(color_buf, 2, interp_base, ea);
_calculate_interp_color(color_buf, 8, interp_base, ea);
_calculate_interp_color(color_buf, 9, interp_altbase, ea+1);
}
}
_plot_hires_pixels(fb_ptr-4, color_buf);
}
static void (*_hirespage_plotter(uint32_t currswitches))(uint16_t, int, int, bool) {
return ((currswitches & SS_80COL) && (currswitches & SS_DHIRES)) ? _plot_hires80 : _plot_hires40;
}
GLUE_C_WRITE(video__write_2e_even0)
{
base_hgrwrt[ea] = b;
drawpage_mode_t mode = _currentMainMode(softswitches);
if (mode == DRAWPAGE_TEXT) {
return;
}
if (!(softswitches & SS_PAGE2)) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_even0_mixed)
{
base_hgrwrt[ea] = b;
drawpage_mode_t mode = _currentMixedMode(softswitches);
if (mode == DRAWPAGE_TEXT) {
return;
}
if (!(softswitches & SS_PAGE2)) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_odd0)
{
base_hgrwrt[ea] = b;
drawpage_mode_t mode = _currentMainMode(softswitches);
if (mode == DRAWPAGE_TEXT) {
return;
}
if (!(softswitches & SS_PAGE2)) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_odd0_mixed)
{
base_hgrwrt[ea] = b;
drawpage_mode_t mode = _currentMixedMode(softswitches);
if (mode == DRAWPAGE_TEXT) {
return;
}
if (!(softswitches & SS_PAGE2)) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_even1)
{
base_ramwrt[ea] = b;
drawpage_mode_t mode = _currentMainMode(softswitches);
if (mode == DRAWPAGE_TEXT) {
return;
}
if (softswitches & SS_PAGE2) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_even1_mixed)
{
base_ramwrt[ea] = b;
drawpage_mode_t mode = _currentMixedMode(softswitches);
if (mode == DRAWPAGE_TEXT) {
return;
}
if (softswitches & SS_PAGE2) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_odd1)
{
base_ramwrt[ea] = b;
drawpage_mode_t mode = _currentMainMode(softswitches);
if (mode == DRAWPAGE_TEXT) {
return;
}
if (softswitches & SS_PAGE2) {
video_setDirty(A2_DIRTY_FLAG);
}
}
GLUE_C_WRITE(video__write_2e_odd1_mixed)
{
base_ramwrt[ea] = b;
drawpage_mode_t mode = _currentMixedMode(softswitches);
if (mode == DRAWPAGE_TEXT) {
return;
}
if (softswitches & SS_PAGE2) {
video_setDirty(A2_DIRTY_FLAG);
}
}
// ----------------------------------------------------------------------------
void video_init(void) {
assert(pthread_self() != cpu_thread_id);
LOG("(re)setting render_thread_id : %ld -> %ld", render_thread_id, pthread_self());
render_thread_id = pthread_self();
assert(!video__fb);
video__fb = MALLOC(SCANWIDTH*SCANHEIGHT*sizeof(uint8_t));
video_clear();
video_backend->init((void*)0);
}
void _video_setRenderThread(pthread_t id) {
LOG("setting render_thread_id : %ld -> %ld", render_thread_id, id);
render_thread_id = id;
}
void video_shutdown(bool emulatorShuttingDown) {
#if MOBILE_DEVICE
// WARNING : shutdown should occur on the render thread. Platform code (iOS, Android) should ensure this is called
// from within a render pass...
assert(pthread_self() == render_thread_id);
#endif
video_backend->shutdown(emulatorShuttingDown);
render_thread_id = 0;
FREE(video__fb);
}
void video_reshape(int w, int h, bool landscape) {
video_backend->reshape(w, h, landscape);
}
void video_render(void) {
assert(pthread_self() == render_thread_id);
video_backend->render();
}
void video_main_loop(void) {
video_backend->main_loop();
}
void video_clear(void) {
memset(video__fb, 0x0, sizeof(uint8_t)*SCANWIDTH*SCANHEIGHT);
video_setDirty(A2_DIRTY_FLAG);
}
bool video_saveState(StateHelper_s *helper) {
bool saved = false;
int fd = helper->fd;
do {
uint8_t state = 0x0;
if (!helper->save(fd, &state, 1)) {
break;
}
LOG("SAVE (no-op) video__current_page = %02x", state);
saved = true;
} while (0);
return saved;
}
bool video_loadState(StateHelper_s *helper) {
bool loaded = false;
int fd = helper->fd;
do {
uint8_t state = 0x0;
if (!helper->load(fd, &state, 1)) {
break;
}
LOG("LOAD (no-op) video__current_page = %02x", state);
loaded = true;
} while (0);
return loaded;
}
// ----------------------------------------------------------------------------
static inline void _currentPageAndBank(uint32_t currswitches, drawpage_mode_t mode, OUTPARM int *page, OUTPARM int *bank) {
// UTAIIe : 5-25
if (currswitches & SS_80STORE) {
*page = 0;
//*bank = !!(currswitches & SS_PAGE2);
*bank = 0;
if (mode != DRAWPAGE_TEXT) {
assert(currswitches & SS_HIRES);
}
return;
}
*page = !!(currswitches & SS_PAGE2);
//*bank = !!(currswitches & SS_RAMRD);
*bank = 0;
}
uint8_t *video_currentFramebuffer(void) {
return video__fb;
}
uint8_t *video_scan(void) {
#warning FIXME TODO ... this needs to scan memory in the same way as the actually //e video scanner
pthread_mutex_lock(&video_scan_mutex);
int page = 0;
int bank = 0;
const uint32_t mainswitches = softswitches;
// render main portion of screen ...
drawpage_mode_t mainDrawPageMode = _currentMainMode(mainswitches);
_currentPageAndBank(mainswitches, mainDrawPageMode, &page, &bank);
if (mainDrawPageMode == DRAWPAGE_TEXT) {
void (*textMainPlotFn)(uint16_t, int, int) = _textpage_plotter(mainswitches, SS_TEXT);
for (unsigned int y=0; y < TEXT_ROWS-4; y++) {
for (unsigned int x=0; x < TEXT_COLS; x++) {
uint16_t off = video__line_offset[y] + x;
textMainPlotFn(off, page, bank);
}
}
} else {
assert(!(mainswitches & SS_TEXT) && "TEXT should not be set");
assert((mainswitches & SS_HIRES) && "HIRES should be set");
void (*hiresMainPlotFn)(uint16_t, int, int, bool) = _hirespage_plotter(mainswitches);
for (unsigned int y=0; y < TEXT_ROWS-4; y++) {
for (unsigned int x=0; x < TEXT_COLS; x++) {
for (unsigned int i = 0; i < 8; i++) {
uint16_t off = video__line_offset[y] + (0x400*i) + x;
hiresMainPlotFn(off, page, bank, /*even*/!(x & 1));
}
}
}
}
// resample current switches ... and render mixed portion of screen
const uint32_t mixedswitches = softswitches;
drawpage_mode_t mixedDrawPageMode = _currentMixedMode(mixedswitches);
_currentPageAndBank(mixedswitches, mixedDrawPageMode, &page, &bank);
if (mixedDrawPageMode == DRAWPAGE_TEXT) {
void (*textMixedPlotFn)(uint16_t, int, int) = _textpage_plotter(mixedswitches, (SS_TEXT|SS_MIXED));
for (unsigned int y=TEXT_ROWS-4; y < TEXT_ROWS; y++) {
for (unsigned int x=0; x < TEXT_COLS; x++) {
uint16_t off = video__line_offset[y] + x;
textMixedPlotFn(off, page, bank);
}
}
} else {
//assert(!(mixedswitches & SS_TEXT) && "TEXT should not be set"); // TEXT may have been reset from last sample?
assert(!(mixedswitches & SS_MIXED) && "MIXED should not be set");
assert((mixedswitches & SS_HIRES) && "HIRES should be set");
void (*hiresMixedPlotFn)(uint16_t, int, int, bool) = _hirespage_plotter(mixedswitches);
for (unsigned int y=TEXT_ROWS-4; y < TEXT_ROWS; y++) {
for (unsigned int x=0; x < TEXT_COLS; x++) {
for (unsigned int i = 0; i < 8; i++) {
uint16_t off = video__line_offset[y] + (0x400*i) + x;
hiresMixedPlotFn(off, page, bank, /*even*/!(x & 1));
}
}
}
}
video_setDirty(FB_DIRTY_FLAG);
pthread_mutex_unlock(&video_scan_mutex);
return video__fb;
}
void video_flashText(void) {
static bool normal = false;
normal = !normal;
// flash only if it's text or mixed modes.
if (softswitches & (SS_TEXT|SS_MIXED)) {
if (normal) {
colormap[ COLOR_FLASHING_BLACK].red = 0;
colormap[ COLOR_FLASHING_BLACK].green = 0;
colormap[ COLOR_FLASHING_BLACK].blue = 0;
colormap[ COLOR_FLASHING_WHITE].red = 0xff;
colormap[ COLOR_FLASHING_WHITE].green = 0xff;
colormap[ COLOR_FLASHING_WHITE].blue = 0xff;
} else {
colormap[ COLOR_FLASHING_BLACK].red = 0xff;
colormap[ COLOR_FLASHING_BLACK].green = 0xff;
colormap[ COLOR_FLASHING_BLACK].blue = 0xff;
colormap[ COLOR_FLASHING_WHITE].red = 0;
colormap[ COLOR_FLASHING_WHITE].green = 0;
colormap[ COLOR_FLASHING_WHITE].blue = 0;
}
video_setDirty(FB_DIRTY_FLAG);
}
}
bool video_isDirty(int flags) {
return (_vid_dirty & flags);
}
unsigned long video_setDirty(flags) {
return __sync_fetch_and_or(&_vid_dirty, flags);
}
unsigned long video_clearDirty(flags) {
return __sync_fetch_and_and(&_vid_dirty, ~flags);
}
// ----------------------------------------------------------------------------
// VBL/timing routines
// References to Jim Sather's books are given as eg:
// UTAIIe:5-7,P3 (Understanding the Apple IIe, chapter 5, page 7, Paragraph 3)
extern unsigned int CpuGetCyclesThisVideoFrame(void);
uint16_t video_scanner_get_address(bool *vblBarOut) {
const bool SW_HIRES = (softswitches & SS_HIRES);
const bool SW_TEXT = (softswitches & SS_TEXT);
const bool SW_PAGE2 = (softswitches & SS_PAGE2);
const bool SW_80STORE = (softswitches & SS_80STORE);
const bool SW_MIXED = (softswitches & SS_MIXED);
// get video scanner position
unsigned int nCycles = CpuGetCyclesThisVideoFrame();
// machine state switches
int nHires = (SW_HIRES && !SW_TEXT) ? 1 : 0;
int nPage2 = SW_PAGE2 ? 1 : 0;
int n80Store = SW_80STORE ? 1 : 0;
// calculate video parameters according to display standard
int nScanLines = bVideoScannerNTSC ? kNTSCScanLines : kPALScanLines;
int nVSyncLine = bVideoScannerNTSC ? kNTSCVSyncLine : kPALVSyncLine;
int nScanCycles = nScanLines * kHClocks;
// calculate horizontal scanning state
int nHClock = (nCycles + kHPEClock) % kHClocks; // which horizontal scanning clock
int nHState = kHClock0State + nHClock; // H state bits
if (nHClock >= kHPresetClock) // check for horizontal preset
{
nHState -= 1; // correct for state preset (two 0 states)
}
int h_0 = (nHState >> 0) & 1; // get horizontal state bits
int h_1 = (nHState >> 1) & 1;
int h_2 = (nHState >> 2) & 1;
int h_3 = (nHState >> 3) & 1;
int h_4 = (nHState >> 4) & 1;
int h_5 = (nHState >> 5) & 1;
// calculate vertical scanning state
int nVLine = nCycles / kHClocks; // which vertical scanning line
int nVState = kVLine0State + nVLine; // V state bits
if ((nVLine >= kVPresetLine)) // check for previous vertical state preset
{
nVState -= nScanLines; // compensate for preset
}
int v_A = (nVState >> 0) & 1; // get vertical state bits
int v_B = (nVState >> 1) & 1;
int v_C = (nVState >> 2) & 1;
int v_0 = (nVState >> 3) & 1;
int v_1 = (nVState >> 4) & 1;
int v_2 = (nVState >> 5) & 1;
int v_3 = (nVState >> 6) & 1;
int v_4 = (nVState >> 7) & 1;
int v_5 = (nVState >> 8) & 1;
// calculate scanning memory address
if (nHires && SW_MIXED && v_4 && v_2) // HIRES TIME signal (UTAIIe:5-7,P3)
{
nHires = 0; // address is in text memory for mixed hires
}
int nAddend0 = 0x0D; // 1 1 0 1
int nAddend1 = (h_5 << 2) | (h_4 << 1) | (h_3 << 0);
int nAddend2 = (v_4 << 3) | (v_3 << 2) | (v_4 << 1) | (v_3 << 0);
int nSum = (nAddend0 + nAddend1 + nAddend2) & 0x0F; // SUM (UTAIIe:5-9)
unsigned int nAddress = 0; // build address from video scanner equations (UTAIIe:5-8,T5.1)
nAddress |= h_0 << 0; // a0
nAddress |= h_1 << 1; // a1
nAddress |= h_2 << 2; // a2
nAddress |= nSum << 3; // a3 - a6
nAddress |= v_0 << 7; // a7
nAddress |= v_1 << 8; // a8
nAddress |= v_2 << 9; // a9
int p2a = !(nPage2 && !n80Store);
int p2b = nPage2 && !n80Store;
if (nHires) // hires?
{
// Y: insert hires-only address bits
nAddress |= v_A << 10; // a10
nAddress |= v_B << 11; // a11
nAddress |= v_C << 12; // a12
nAddress |= p2a << 13; // a13
nAddress |= p2b << 14; // a14
}
else
{
// N: insert text-only address bits
nAddress |= p2a << 10; // a10
nAddress |= p2b << 11; // a11
// Apple ][ (not //e) and HBL?
if (false/*IS_APPLE2*/ && // Apple II only (UTAIIe:I-4,#5)
!h_5 && (!h_4 || !h_3)) // HBL (UTAIIe:8-10,F8.5)
{
nAddress |= 1 << 12; // Y: a12 (add $1000 to address!)
}
}
// update VBL' state
if (vblBarOut != NULL)
{
*vblBarOut = !v_4 || !v_3; // VBL' = (v_4 & v_3)' (UTAIIe:5-10,#3)
}
return (uint16_t)nAddress;
}
uint8_t floating_bus(void) {
uint16_t scanner_addr = video_scanner_get_address(NULL);
return apple_ii_64k[0][scanner_addr];
}
uint8_t floating_bus_hibit(const bool hibit) {
uint16_t scanner_addr = video_scanner_get_address(NULL);
uint8_t b = apple_ii_64k[0][scanner_addr];
return (b & ~0x80) | (hibit ? 0x80 : 0);
}
static void _init_interface(void) {
LOG("Initializing display subsystem");
_initialize_interface_fonts();
_initialize_hires_values();
_initialize_row_col_tables();
_initialize_dhires_values();
_initialize_color();
}
static __attribute__((constructor)) void __init_interface(void) {
emulator_registerStartupCallback(CTOR_PRIORITY_LATE, &_init_interface);
}
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