/* * 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; typedef struct backend_node_s { struct backend_node_s *next; long order; video_backend_s *backend; } backend_node_s; static backend_node_s *head = NULL; // framebuffers static uint8_t *video__fb = NULL; A2Color_s colormap[256] = { { 0 } }; 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 static color_mode_t color_mode = COLOR_NONE; // 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 } static void video_prefsChanged(const char *domain) { long val = COLOR_INTERP; prefs_parseLongValue(domain, PREF_COLOR_MODE, &val, /*base:*/10); if (val < 0) { val = COLOR_INTERP; } if (val >= NUM_COLOROPTS) { val = COLOR_INTERP; } color_mode = (color_mode_t)val; video_reset(); } 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 { /* ??? */ 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_getCurrentBackend()->init((void*)0); } void _video_setRenderThread(pthread_t id) { LOG("setting render_thread_id : %ld -> %ld", render_thread_id, id); render_thread_id = id; } bool video_isRenderThread(void) { return (pthread_self() == render_thread_id); } void video_shutdown(void) { #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(!render_thread_id || pthread_self() == render_thread_id); #endif video_getCurrentBackend()->shutdown(); if (pthread_self() == render_thread_id) { FREE(video__fb); } } void video_render(void) { assert(pthread_self() == render_thread_id); video_getCurrentBackend()->render(); } void video_main_loop(void) { video_getCurrentBackend()->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(unsigned long flags) { return (_vid_dirty & flags); } unsigned long video_setDirty(unsigned long flags) { return __sync_fetch_and_or(&_vid_dirty, flags); } unsigned long video_clearDirty(unsigned long 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) { #if TESTING // HACK FIXME TODO : where is the non-determinism sneaking in here? return 0; #endif uint16_t scanner_addr = video_scanner_get_address(NULL); return apple_ii_64k[0][scanner_addr]; } uint8_t floating_bus_hibit(const bool hibit) { #if TESTING // HACK FIXME TODO : where is the non-determinism sneaking in here? return 0; #endif 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 bool null_backend_running = true; void video_registerBackend(video_backend_s *backend, long order) { static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_lock(&mutex); backend_node_s *node = MALLOC(sizeof(backend_node_s)); assert(node); node->next = NULL; node->order = order; node->backend = backend; backend_node_s *p0 = NULL; backend_node_s *p = head; while (p && (order > p->order)) { p0 = p; p = p->next; } if (p0) { p0->next = node; } else { head = node; } node->next = p; pthread_mutex_unlock(&mutex); } video_backend_s *video_getCurrentBackend(void) { return head->backend; } video_animation_s *video_getAnimationDriver(void) { return video_getCurrentBackend()->anim; } static void _null_backend_init(void *context) { } static void _null_backend_main_loop(void) { while (null_backend_running) { sleep(1); } } static void _null_backend_render(void) { } static void _null_backend_shutdown(void) { null_backend_running = false; } static void _init_interface(void) { LOG("Initializing display subsystem"); _initialize_interface_fonts(); _initialize_hires_values(); _initialize_row_col_tables(); _initialize_dhires_values(); _initialize_color(); prefs_registerListener(PREF_DOMAIN_VIDEO, &video_prefsChanged); static video_backend_s null_backend = { 0 }; null_backend.init = &_null_backend_init; null_backend.main_loop = &_null_backend_main_loop; null_backend.render = &_null_backend_render; null_backend.shutdown = &_null_backend_shutdown; static video_animation_s _null_animations = { 0 }; null_backend.anim = &_null_animations; video_registerBackend(&null_backend, VID_PRIO_NULL); } static __attribute__((constructor)) void __init_interface(void) { emulator_registerStartupCallback(CTOR_PRIORITY_LATE, &_init_interface); }