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winbgi.cpp
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winbgi.cpp
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#include <windows.h>
#include <stddef.h>
#include <stdio.h>
#include <math.h>
#include "graphics.h"
#define MAX_PAGES 16
static HDC hdc[4];
static HPEN hPen;
static HRGN hRgn;
static HFONT hFont;
static NPLOGPALETTE pPalette;
static PAINTSTRUCT ps;
static HWND hWnd;
static HBRUSH hBrush[USER_FILL+1];
static HBRUSH hBackgroundBrush;
static HPALETTE hPalette;
static HBITMAP hBitmap[MAX_PAGES];
static HBITMAP hPutimageBitmap;
static int timeout_expired;
#define PEN_CACHE_SIZE 8
#define FONT_CACHE_SIZE 8
#define BG 16
#define TIMER_ID 1
//
// When XOR or NOT write modes are used for drawing high BG bit is cleared, so
// drawing colors should be adjusted to preserve this bit
//
#define ADJUSTED_MODE(mode) ((mode) == XOR_PUT || (mode) == NOT_PUT)
int bgiemu_handle_redraw = TRUE;
int bgiemu_default_mode = VGAHI; //VGAMAX;
static int screen_width;
static int screen_height;
static int window_width;
static int window_height;
static int line_style_cnv[] = {
PS_SOLID, PS_DOT, PS_DASHDOT, PS_DASH,
PS_DASHDOTDOT /* if user style lines are not supported */
};
static int write_mode_cnv[] =
{R2_COPYPEN, R2_XORPEN, R2_MERGEPEN, R2_MASKPEN, R2_NOTCOPYPEN};
static int bitblt_mode_cnv[] =
{SRCCOPY, SRCINVERT, SRCPAINT, SRCAND, NOTSRCCOPY};
static int font_weight[] =
{
FW_BOLD, // DefaultFont
FW_NORMAL, // TriplexFont
FW_NORMAL, // SmallFont
FW_NORMAL, // SansSerifFont
FW_NORMAL, // GothicFont
FW_NORMAL, // ScriptFont
FW_NORMAL, // SimplexFont
FW_NORMAL, // TriplexScriptFont
FW_NORMAL, // ComplexFont
FW_NORMAL, // EuropeanFont
FW_BOLD // BoldFont
};
static int font_family[] =
{
FIXED_PITCH|FF_DONTCARE, // DefaultFont
VARIABLE_PITCH|FF_ROMAN, // TriplexFont
VARIABLE_PITCH|FF_MODERN, // SmallFont
VARIABLE_PITCH|FF_DONTCARE, // SansSerifFont
VARIABLE_PITCH|FF_SWISS, // GothicFont
VARIABLE_PITCH|FF_SCRIPT, // ScriptFont
VARIABLE_PITCH|FF_DONTCARE, // SimplexFont
VARIABLE_PITCH|FF_SCRIPT, // TriplexScriptFont
VARIABLE_PITCH|FF_DONTCARE, // ComplexFont
VARIABLE_PITCH|FF_DONTCARE, // EuropeanFont
VARIABLE_PITCH|FF_DONTCARE // BoldFont
};
static const char* font_name[] =
{
"Console", // DefaultFont
"Times New Roman", // TriplexFont
"Small Fonts", // SmallFont
"MS Sans Serif", // SansSerifFont
"Arial", // GothicFont
"Script", // ScriptFont
"Times New Roman", // SimplexFont
"Script", // TriplexScriptFont
"Courier New", // ComplexFont
"Times New Roman", // EuropeanFont
"Courier New Bold", // BoldFont
};
static int text_halign_cnv[] = {TA_LEFT, TA_CENTER, TA_RIGHT};
static int text_valign_cnv[] = {TA_BOTTOM, TA_BASELINE, TA_TOP};
static palettetype current_palette;
static struct { int width; int height; } font_metrics[][11] = {
{{0,0},{8,8},{16,16},{24,24},{32,32},{40,40},{48,48},{56,56},{64,64},{72,72},{80,80}}, // DefaultFont
{{0,0},{13,18},{14,20},{16,23},{22,31},{29,41},{36,51},{44,62},{55,77},{66,93},{88,124}}, // TriplexFont
{{0,0},{3,5},{4,6},{4,6},{6,9},{8,12},{10,15},{12,18},{15,22},{18,27},{24,36}}, // SmallFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // SansSerifFont
{{0,0},{13,19},{14,21},{16,24},{22,32},{29,42},{36,53},{44,64},{55,80},{66,96},{88,128}}, // GothicFont
// I am not sure about metrics of following fonts
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // ScriptFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // SimplexFont
{{0,0},{13,18},{14,20},{16,23},{22,31},{29,41},{36,51},{44,62},{55,77},{66,93},{88,124}}, // TriplexScriptFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // ComplexFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}}, // EuropeanFont
{{0,0},{11,19},{12,21},{14,24},{19,32},{25,42},{31,53},{38,64},{47,80},{57,96},{76,128}} // BoldFont
};
struct BGIimage {
short width;
short height;
int reserved; // let bits be aligned to DWORD boundary
char bits[1];
};
struct BGIbitmapinfo {
BITMAPINFOHEADER hdr;
short color_table[16];
};
static BGIbitmapinfo bminfo = {
{sizeof(BITMAPINFOHEADER), 0, 0, 1, 4, BI_RGB}
};
//static int* image_bits;
static int normal_font_size[] = { 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4};
static linesettingstype line_settings;
static fillsettingstype fill_settings;
static int color;
static int bkcolor;
static int text_color;
static int aspect_ratio_x, aspect_ratio_y;
static textsettingstype text_settings;
static viewporttype view_settings;
static int font_mul_x, font_div_x, font_mul_y, font_div_y;
static enum { ALIGN_NOT_SET, UPDATE_CP, NOT_UPDATE_CP } text_align_mode;
#define BORDER_WIDTH 8
#define BORDER_HEIGHT 27
static int write_mode;
static int visual_page;
static int active_page;
static arccoordstype ac;
class char_queue {
private :
int d_maxsize;
int d_put,d_get;
char *d_buf;
public :
char_queue(int size=256) : d_maxsize(size), d_put(0), d_get(0)
{ d_buf=new char[d_maxsize]; }
~char_queue()
{ delete[] d_buf; }
bool is_empty() const { return d_put==d_get; }
void put(char c)
{
d_buf[d_put]=c;
if (d_put==d_maxsize) //no more place
d_get=(d_get+1)%d_maxsize;
d_put=(d_put+1)%d_maxsize;
}
char get()
{
char c=d_buf[d_get];
d_get=(d_get+1)%d_maxsize;
return c;
}
};
static char_queue kbd_queue;
//rajouté : queue pour les evenements clics de souris
class eventmouse_queue {
private :
int d_maxsize;
int d_put,d_get;
int *d_bufx,*d_bufy;
public :
eventmouse_queue(int size=256) : d_maxsize(size), d_put(0), d_get(0)
{ d_bufx=new int[d_maxsize];d_bufy=new int[d_maxsize]; }
~eventmouse_queue()
{ delete[] d_bufx;delete[] d_bufy; }
bool is_empty() const { return d_put==d_get; }
void put(POINTS pt)
{
d_bufx[d_put]=pt.x;d_bufy[d_put]=pt.y;
if (d_put==d_maxsize) //no more place
d_get=(d_get+1)%d_maxsize;
d_put=(d_put+1)%d_maxsize;
}
void get(int& x,int& y)
{
x=d_bufx[d_get];y=d_bufy[d_get];
d_get=(d_get+1)%d_maxsize;
}
};
static eventmouse_queue mouse_queue;
inline int convert_userbits(DWORD buf[32], unsigned pattern)
{
int i = 0, j;
pattern &= 0xFFFF;
while (true) {
for (j = 0; pattern & 1; j++) pattern >>= 1;
buf[i++] = j;
if (pattern == 0) {
buf[i++] = 16 - j;
return i;
}
for (j = 0; !(pattern & 1); j++) pattern >>= 1;
buf[i++] = j;
}
}
class l2elem {
public:
l2elem* next;
l2elem* prev;
void link_after(l2elem* after) {
(next = after->next)->prev = this;
(prev = after)->next = this;
}
void unlink() {
prev->next = next;
next->prev = prev;
}
void prune() {
next = prev = this;
}
};
class l2list : public l2elem {
public:
l2list() { prune(); }
};
class pen_cache : public l2list {
class pen_cache_item : public l2elem {
public:
HPEN pen;
int color;
int width;
int style;
unsigned pattern;
};
pen_cache_item* free;
pen_cache_item cache[PEN_CACHE_SIZE];
public:
pen_cache() {
for (int i = 0; i < PEN_CACHE_SIZE-1; i++) {
cache[i].next = &cache[i+1];
}
cache[PEN_CACHE_SIZE-1].next = NULL;
free = cache;
}
void select(int color)
{
for (l2elem* elem = next; elem != this; elem = elem->next) {
pen_cache_item* ci = (pen_cache_item*)elem;
if (ci->color == color &&
ci->style == line_settings.linestyle &&
ci->width == line_settings.thickness &&
(line_settings.linestyle != USERBIT_LINE
|| line_settings.upattern == ci->pattern))
{
ci->unlink(); // LRU discipline
ci->link_after(this);
if (hPen != ci->pen) {
hPen = ci->pen;
SelectObject(hdc[0], hPen);
SelectObject(hdc[1], hPen);
}
return;
}
}
hPen = NULL;
if (line_settings.linestyle == USERBIT_LINE) {
LOGBRUSH lb;
lb.lbColor = PALETTEINDEX(color);
lb.lbStyle = BS_SOLID;
DWORD style[32];
hPen = ExtCreatePen(PS_GEOMETRIC|PS_USERSTYLE,
line_settings.thickness, &lb,
convert_userbits(style,line_settings.upattern),
style);
}
if (hPen == NULL) {
hPen = CreatePen(line_style_cnv[line_settings.linestyle],
line_settings.thickness,
PALETTEINDEX(color));
}
SelectObject(hdc[0], hPen);
SelectObject(hdc[1], hPen);
pen_cache_item* p;
if (free == NULL) {
p = (pen_cache_item*)prev;
p->unlink();
DeleteObject(p->pen);
} else {
p = free;
free = (pen_cache_item*)p->next;
}
p->pen = hPen;
p->color = color;
p->width = line_settings.thickness;
p->style = line_settings.linestyle;
p->pattern = line_settings.upattern;
p->link_after(this);
}
};
static pen_cache pcache;
class font_cache : public l2list {
class font_cache_item : public l2elem {
public:
HFONT font;
int type;
int direction;
int width, height;
};
font_cache_item* free;
font_cache_item cache[FONT_CACHE_SIZE];
public:
font_cache() {
for (int i = 0; i < FONT_CACHE_SIZE-1; i++) {
cache[i].next = &cache[i+1];
}
cache[FONT_CACHE_SIZE-1].next = NULL;
free = cache;
}
void select(int type, int direction, int width, int height)
{
for (l2elem* elem = next; elem != this; elem = elem->next) {
font_cache_item* ci = (font_cache_item*)elem;
if (ci->type == type &&
ci->direction == direction &&
ci->width == width &&
ci->height == height)
{
ci->unlink();
ci->link_after(this);
if (hFont != ci->font) {
hFont = ci->font;
SelectObject(hdc[0], hFont);
SelectObject(hdc[1], hFont);
}
return;
}
}
hFont = CreateFont(-height,
width,
direction*900,
(direction&1)*900,
font_weight[type],
FALSE,
FALSE,
FALSE,
DEFAULT_CHARSET,
OUT_DEFAULT_PRECIS,
CLIP_DEFAULT_PRECIS,
DEFAULT_QUALITY,
font_family[type],
font_name[type]);
SelectObject(hdc[0], hFont);
SelectObject(hdc[1], hFont);
font_cache_item* p;
if (free == NULL) {
p = (font_cache_item*)prev;
p->unlink();
DeleteObject(p->font);
} else {
p = free;
free = (font_cache_item*)p->next;
}
p->font = hFont;
p->type = type;
p->width = width;
p->height = height;
p->direction = direction;
p->link_after(this);
}
};
static font_cache fcache;
#define FLAGS PC_NOCOLLAPSE
#define PALETTE_SIZE 256
static PALETTEENTRY BGIcolor[16] = {
{ 0, 0, 0, FLAGS },
{ 0, 0, 255, FLAGS },
{ 0, 255, 0, FLAGS },
{ 0, 255, 255, FLAGS },
{ 255, 0, 0, FLAGS },
{ 255, 0, 255, FLAGS },
{ 165, 42, 42, FLAGS },
{ 211, 211, 211, FLAGS },
{ 47, 79, 79, FLAGS },
{ 173, 216, 230, FLAGS },
{ 32, 178, 170, FLAGS },
{ 224, 255, 255, FLAGS },
{ 240, 128, 128, FLAGS },
{ 219, 112, 147, FLAGS },
{ 255, 255, 0, FLAGS },
{ 255, 255, 255, FLAGS }
};
static PALETTEENTRY BGIpalette[16];
static short SolidBrushBitmap[8] =
{~0xFF, ~0xFF, ~0xFF, ~0xFF, ~0xFF, ~0xFF, ~0xFF, ~0xFF};
static short LineBrushBitmap[8] =
{~0x00, ~0x00, ~0x00, ~0x00, ~0x00, ~0x00, ~0x00, ~0xFF};
static short LtslashBrushBitmap[8] =
{~0x01, ~0x02, ~0x04, ~0x08, ~0x10, ~0x20, ~0x40, ~0x80};
static short SlashBrushBitmap[8] =
{~0x81, ~0x03, ~0x06, ~0x0C, ~0x18, ~0x30, ~0x60, ~0xC0};
static short BkslashBrushBitmap[8] =
{~0xC0, ~0x60, ~0x30, ~0x18, ~0x0C, ~0x06, ~0x03, ~0x81};
static short LtbkslashBrushBitmap[8] =
{~0x80, ~0x40, ~0x20, ~0x10, ~0x08, ~0x04, ~0x02, ~0x01};
static short HatchBrushBitmap[8] =
{~0x01, ~0x01, ~0x01, ~0x01, ~0x01, ~0x01, ~0x01, ~0xFF};
static short XhatchBrushBitmap[8] =
{~0x81, ~0x42, ~0x24, ~0x18, ~0x18, ~0x24, ~0x42, ~0x81};
static short InterleaveBrushBitmap[8] =
{~0x55, ~0xAA, ~0x55, ~0xAA, ~0x55, ~0xAA, ~0x55, ~0xAA};
static short WidedotBrushBitmap[8] =
{~0x00, ~0x00, ~0x00, ~0x00, ~0x00, ~0x00, ~0x00, ~0x01};
static short ClosedotBrushBitmap[8] =
{~0x44, ~0x00, ~0x11, ~0x00, ~0x44, ~0x00, ~0x11, ~0x00};
char* grapherrormsg(int code) {
static char buf[256];
FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM,
NULL, code, 0,
buf, sizeof buf, NULL);
return buf;
}
static int gdi_error_code;
int graphresult()
{
return gdi_error_code;
}
void setcolor(int c)
{
c &= MAXCOLORS;
color = c;
SetTextColor(hdc[0], PALETTEINDEX(c+BG));
SetTextColor(hdc[1], PALETTEINDEX(c+BG));
}
int getmaxcolor()
{
return WHITE;
}
int getmaxmode()
{
return VGAMAX;
}
char* getmodename(int mode)
{
static char mode_str[32];
sprintf(mode_str, "%d x %d %s", window_width, window_height,
mode < 2 ? "EGA" : "VGA");
return mode_str;
}
int getx()
{
POINT pos;
GetCurrentPositionEx(hdc[active_page == visual_page ? 0 : 1], &pos);
return pos.x;
}
int gety()
{
POINT pos;
GetCurrentPositionEx(hdc[active_page == visual_page ? 0 : 1], &pos);
return pos.y;
}
int getmaxx()
{
return window_width-1;
}
int getmaxy()
{
return window_height-1;
}
int getcolor()
{
return color;
}
const char* getdrivername()
{
return "EGAVGA";
}
void setlinestyle(int style, unsigned int pattern, int thickness)
{
line_settings.linestyle = style;
line_settings.thickness = thickness;
line_settings.upattern = pattern;
}
void getlinesettings(linesettingstype* ls)
{
*ls = line_settings;
}
void setwritemode(int mode)
{
write_mode = mode;
}
void setpalette(int index, int color)
{
color &= MAXCOLORS;
BGIpalette[index] = BGIcolor[color];
current_palette.colors[index] = color;
SetPaletteEntries(hPalette, BG+index, 1, &BGIpalette[index]);
RealizePalette(hdc[0]);
if (index == 0) {
bkcolor = 0;
}
}
void setrgbpalette(int index, int red, int green, int blue)
{
BGIpalette[index].peRed = red & 0xFC;
BGIpalette[index].peGreen = green & 0xFC;
BGIpalette[index].peBlue = blue & 0xFC;
SetPaletteEntries(hPalette, BG+index, 1, &BGIpalette[index]);
RealizePalette(hdc[0]);
if (index == 0) {
bkcolor = 0;
}
}
void setallpalette(palettetype* pal)
{
for (int i = 0; i < pal->size; i++) {
current_palette.colors[i] = pal->colors[i] & MAXCOLORS;
BGIpalette[i] = BGIcolor[pal->colors[i] & MAXCOLORS];
}
SetPaletteEntries(hPalette, BG, pal->size, BGIpalette);
RealizePalette(hdc[0]);
bkcolor = 0;
}
palettetype* getdefaultpalette()
{
static palettetype default_palette = { 16,
{ BLACK, BLUE, GREEN, CYAN, RED, MAGENTA, BROWN, LIGHTGRAY, DARKGRAY,
LIGHTBLUE, LIGHTGREEN, LIGHTCYAN, LIGHTRED, LIGHTMAGENTA, YELLOW, WHITE
}};
return &default_palette;
}
void getpalette(palettetype* pal)
{
*pal = current_palette;
}
int getpalettesize()
{
return MAXCOLORS+1;
}
void setbkcolor(int color)
{
color &= MAXCOLORS;
BGIpalette[0] = BGIcolor[color];
SetPaletteEntries(hPalette, BG, 1, &BGIpalette[0]);
RealizePalette(hdc[0]);
bkcolor = color;
}
int getbkcolor()
{
return bkcolor;
}
void setfillstyle(int style, int color)
{
fill_settings.pattern = style;
fill_settings.color = color & MAXCOLORS;
SelectObject(hdc[0], hBrush[style]);
SelectObject(hdc[1], hBrush[style]);
}
void getfillsettings(fillsettingstype* fs)
{
*fs = fill_settings;
}
static fillpatterntype userfillpattern =
{-1, -1, -1, -1, -1, -1, -1, -1};
void setfillpattern(char const* upattern, int color)
{
static HBITMAP hFillBitmap;
static short bitmap_data[8];
for (int i = 0; i < 8; i++) {
bitmap_data[i] = (unsigned char)~upattern[i];
userfillpattern[i] = upattern[i];
}
HBITMAP h = CreateBitmap(8, 8, 1, 1, bitmap_data);
HBRUSH hb = CreatePatternBrush(h);
DeleteObject(hBrush[USER_FILL]);
if (hFillBitmap) {
DeleteObject(hFillBitmap);
}
hFillBitmap = h;
hBrush[USER_FILL] = hb;
SelectObject(hdc[0], hb);
SelectObject(hdc[1], hb);
fill_settings.color = color & MAXCOLORS;
fill_settings.pattern = USER_FILL;
}
void getfillpattern(fillpatterntype fp)
{
memcpy(fp, userfillpattern, sizeof userfillpattern);
}
inline void select_fill_color()
{
if (text_color != fill_settings.color) {
text_color = fill_settings.color;
SetTextColor(hdc[0], PALETTEINDEX(text_color+BG));
SetTextColor(hdc[1], PALETTEINDEX(text_color+BG));
}
}
void setusercharsize(int multx, int divx, int multy, int divy)
{
font_mul_x = multx;
font_div_x = divx;
font_mul_y = multy;
font_div_y = divy;
text_settings.charsize = 0;
}
void moveto(int x, int y)
{
if (bgiemu_handle_redraw || visual_page != active_page) {
MoveToEx(hdc[1], x, y, NULL);
}
if (visual_page == active_page) {
MoveToEx(hdc[0], x, y, NULL);
}
}
void moverel(int dx, int dy)
{
POINT pos;
GetCurrentPositionEx(hdc[1], &pos);
moveto(pos.x + dx, pos.y + dy);
}
static void select_font()
{
if (text_settings.charsize == 0) {
fcache.select(text_settings.font, text_settings.direction,
font_metrics[text_settings.font]
[normal_font_size[text_settings.font]].width
*font_mul_x/font_div_x,
font_metrics[text_settings.font]
[normal_font_size[text_settings.font]].height
*font_mul_y/font_div_y);
} else {
fcache.select(text_settings.font, text_settings.direction,
font_metrics[text_settings.font][text_settings.charsize].width,
font_metrics[text_settings.font][text_settings.charsize].height);
}
}
static void text_output(int x, int y, const char* str)
{
select_font();
if (text_color != color) {
text_color = color;
SetTextColor(hdc[0], PALETTEINDEX(text_color+BG));
SetTextColor(hdc[1], PALETTEINDEX(text_color+BG));
}
if (bgiemu_handle_redraw || visual_page != active_page) {
TextOut(hdc[1], x, y, str, strlen(str));
}
if (visual_page == active_page) {
TextOut(hdc[0], x, y, str, strlen(str));
}
}
void settextstyle(int font, int direction, int char_size)
{
if (char_size > 10) {
char_size = 10;
}
text_settings.direction = direction;
text_settings.font = font;
text_settings.charsize = char_size;
text_align_mode = ALIGN_NOT_SET;
}
void settextjustify(int horiz, int vert)
{
text_settings.horiz = horiz;
text_settings.vert = vert;
text_align_mode = ALIGN_NOT_SET;
}
void gettextsettings(textsettingstype* ts)
{
*ts = text_settings;
}
int textheight(const char* str)
{
SIZE ss;
select_font();
GetTextExtentPoint32(hdc[0], str, strlen(str), &ss);
return ss.cy;
}
int textwidth(const char* str)
{
SIZE ss;
select_font();
GetTextExtentPoint32(hdc[0], str, strlen(str), &ss);
return ss.cx;
}
void outtext(const char* str)
{
if (text_align_mode != UPDATE_CP) {
text_align_mode = UPDATE_CP;
int align = (text_settings.direction == HORIZ_DIR)
? (TA_UPDATECP |
text_halign_cnv[text_settings.horiz] |
text_valign_cnv[text_settings.vert])
: (TA_UPDATECP |
text_valign_cnv[text_settings.horiz] |
text_halign_cnv[text_settings.vert]);
SetTextAlign(hdc[0], align);
SetTextAlign(hdc[1], align);
}
text_output(0, 0, str);
}
void outtextxy(int x, int y, const char* str)
{
if (text_align_mode != NOT_UPDATE_CP) {
text_align_mode = NOT_UPDATE_CP;
int align = (text_settings.direction == HORIZ_DIR)
? (TA_NOUPDATECP |
text_halign_cnv[text_settings.horiz] |
text_valign_cnv[text_settings.vert])
: (TA_NOUPDATECP |
text_valign_cnv[text_settings.horiz] |
text_halign_cnv[text_settings.vert]);
SetTextAlign(hdc[0], align);
SetTextAlign(hdc[1], align);
}
text_output(x, y, str);
}
void setviewport(int x1, int y1, int x2, int y2, int clip)
{
view_settings.left = x1;
view_settings.top = y1;
view_settings.right = x2;
view_settings.bottom = y2;
view_settings.clip = clip;
if (hRgn) {
DeleteObject(hRgn);
}
hRgn = clip ? CreateRectRgn(x1, y1, x2, y2) : NULL;
SelectClipRgn(hdc[1], hRgn);
SetViewportOrgEx(hdc[1], x1, y1, NULL);
SelectClipRgn(hdc[0], hRgn);
SetViewportOrgEx(hdc[0], x1, y1, NULL);
moveto(0,0);
}
void getviewsettings(viewporttype *viewport)
{
*viewport = view_settings;
}
const double pi = 3.14159265358979323846;
inline void arc_coords(double angle, double rx, double ry, int& x, int& y)
{
if (rx == 0 || ry == 0) {
x = y = 0;
return;
}
double s = sin(angle*pi/180.0);
double c = cos(angle*pi/180.0);
if (fabs(s) < fabs(c)) {
double tg = s/c;
double xr = sqrt((double)rx*rx*ry*ry/(ry*ry+rx*rx*tg*tg));
x = int((c >= 0) ? xr : -xr);
y = int((s >= 0) ? -xr*tg : xr*tg);
} else {
double ctg = c/s;
double yr = sqrt((double)rx*rx*ry*ry/(rx*rx+ry*ry*ctg*ctg));
x = int((c >= 0) ? yr*ctg : -yr*ctg);
y = int((s >= 0) ? -yr : yr);
}
}
void ellipse(int x, int y, int start_angle, int end_angle,
int rx, int ry)
{
ac.x = x;
ac.y = y;
arc_coords(start_angle, rx, ry, ac.xstart, ac.ystart);
arc_coords(end_angle, rx, ry, ac.xend, ac.yend);
ac.xstart += x; ac.ystart += y;
ac.xend += x; ac.yend += y;
pcache.select(color+BG);
if (bgiemu_handle_redraw || visual_page != active_page) {
Arc(hdc[1], x-rx, y-ry, x+rx, y+ry,
ac.xstart, ac.ystart, ac.xend, ac.yend);
}
if (visual_page == active_page) {
Arc(hdc[0], x-rx, y-ry, x+rx, y+ry,
ac.xstart, ac.ystart, ac.xend, ac.yend);
}
}
void fillellipse(int x, int y, int rx, int ry)
{
pcache.select(color+BG);
select_fill_color();
if (bgiemu_handle_redraw || visual_page != active_page) {
Ellipse(hdc[1], x-rx, y-ry, x+rx, y+ry);
}
if (visual_page == active_page) {
Ellipse(hdc[0], x-rx, y-ry, x+rx, y+ry);
}
}
static void allocate_new_graphic_page(int page)
{
RECT scr;
scr.left = -view_settings.left;
scr.top = -view_settings.top;
scr.right = screen_width-view_settings.left-1;
scr.bottom = screen_height-view_settings.top-1;
hBitmap[page] = CreateCompatibleBitmap(hdc[0],screen_width,screen_height);
SelectObject(hdc[1], hBitmap[page]);
SelectClipRgn(hdc[1], NULL);
FillRect(hdc[1], &scr, hBackgroundBrush);
SelectClipRgn(hdc[1], hRgn);
}
void setactivepage(int page)
{
if (hBitmap[page] == NULL) {
allocate_new_graphic_page(page);
} else {
SelectObject(hdc[1], hBitmap[page]);
}
if (!bgiemu_handle_redraw && active_page == visual_page) {
POINT pos;
GetCurrentPositionEx(hdc[0], &pos);
MoveToEx(hdc[1], pos.x, pos.y, NULL);
}
active_page = page;
}
void setvisualpage(int page)
{
POINT pos;
if (hdc[page] == NULL) {
allocate_new_graphic_page(page);
}
if (!bgiemu_handle_redraw && active_page == visual_page) {
SelectObject(hdc[1], hBitmap[visual_page]);
SelectClipRgn(hdc[1], NULL);
BitBlt(hdc[1], -view_settings.left, -view_settings.top,
window_width, window_height,
hdc[0], -view_settings.left, -view_settings.top,
SRCCOPY);
SelectClipRgn(hdc[1], hRgn);
GetCurrentPositionEx(hdc[0], &pos);
MoveToEx(hdc[1], pos.x, pos.y, NULL);
}
SelectClipRgn(hdc[0], NULL);
SelectClipRgn(hdc[1], NULL);
SelectObject(hdc[1], hBitmap[page]);
BitBlt(hdc[0], -view_settings.left,
-view_settings.top, window_width, window_height,
hdc[1], -view_settings.left, -view_settings.top, SRCCOPY);
SelectClipRgn(hdc[0], hRgn);
SelectClipRgn(hdc[1], hRgn);
if (page != active_page) {
SelectObject(hdc[1], hBitmap[active_page]);
}
if (active_page != visual_page) {
GetCurrentPositionEx(hdc[1], &pos);
MoveToEx(hdc[0], pos.x, pos.y, NULL);
}
visual_page = page;
}
void setaspectratio(int ax, int ay)
{
aspect_ratio_x = ax;
aspect_ratio_y = ay;
}
void getaspectratio(int* ax, int* ay)
{
*ax = aspect_ratio_x;
*ay = aspect_ratio_y;
}
void circle(int x, int y, int radius)
{
pcache.select(color+BG);
int ry = (unsigned)radius*aspect_ratio_x/aspect_ratio_y;
int rx = radius;
if (bgiemu_handle_redraw || visual_page != active_page) {
Arc(hdc[1], x-rx, y-ry, x+rx, y+ry, x+rx, y, x+rx, y);
}
if (visual_page == active_page) {
Arc(hdc[0], x-rx, y-ry, x+rx, y+ry, x+rx, y, x+rx, y);
}
}
void arc(int x, int y, int start_angle, int end_angle, int radius)
{
ac.x = x;
ac.y = y;