//------------- Begin of function VgaBuf::bar_alpha --------------//
//
// Draw a bar with alpha-blendinig
//
// Syntax : bar( x1, y1, x2, y2, color )
//
// <int> x1,y1 - the top left vertex of the bar
// <int> x2,y2 - the bottom right vertex of the bar
// <int> logAlpha - negative log alpha (right bit shift count, 0 to 5)
// <int> color index - the index of a 256 color palette
//
// logAlpha : 0=transparent ... 5=opaque colorCode
//
void VgaBuf::bar_alpha(int x1,int y1,int x2,int y2,int logAlpha, int colorCode)
{
err_when( !buf_locked );
if( logAlpha <= 0 )
{
err_when(logAlpha < 0);
// if logAlpha == 0, no change
}
else if( logAlpha < 5 )
{
if( is_front )
mouse.hide_area(x1,y1,x2,y2);
IMGbarAlpha(cur_buf_ptr, cur_pitch, x1, y1, x2, y2, logAlpha, translate_color(colorCode) );
if( is_front )
mouse.show_area();
}
else // logAlpha >= 5, equivalence to VgaBuf::bar
{
if( is_front )
mouse.hide_area(x1,y1,x2,y2);
IMGbar(cur_buf_ptr, cur_pitch, x1, y1, x2, y2, translate_color(colorCode) );
if( is_front )
mouse.show_area();
}
}
void
console_set_color(int32 foreground, int32 background)
{
char buff[] = "\033b \033c ";
buff[2] += (char)translate_color(foreground);
buff[5] += (char)translate_color(background);
sInput.WriteAt(NULL, 0LL, buff, 6);
}
void
console_set_color(int32 foreground, int32 background)
{
// Note: Toggling the cursor doesn't seem to help. We still get cursor
// artifacts.
of_interpret("toggle-cursor"
" to foreground-color"
" to background-color"
" toggle-cursor",
2, 0, translate_color(foreground), translate_color(background));
}
BOOL Vga::init()
{
//--------- Initialize DirectDraw object --------//
if( !init_dd() )
return FALSE;
if( !set_mode(VGA_WIDTH, VGA_HEIGHT) )
return FALSE;
File palFile;
palFile.file_open(DIR_RES"pal_std.res");
BYTE palBuf[0x100][3];
palFile.file_seek(8); // bypass the header info
palFile.file_read(palBuf, sizeof(palBuf));
palFile.file_close();
// ------- palette description -------------//
PalDesc palBufDesc( palBuf, 3, 0x100, 8 );
//-------- create color remap table ---------//
vga_color_table->generate_table_fast( MAX_BRIGHTNESS_ADJUST_DEGREE, palBufDesc, ColorTable::bright_func );
default_remap_table = (short *) malloc(0x100 * 2);
memcpy( default_remap_table, vga_color_table->get_table(0), 0x100 * 2 );
default_blend_table = 0;
transparent_code_w = translate_color(TRANSPARENT_CODE);
return TRUE;
}
//--------- Start of function Vga::load_pal ----------//
//
// Load the palette from a file and set it to the front buf.
//
BOOL Vga::load_pal(char* fileName) {
char palBuf[256][3];
File palFile;
palFile.file_open(fileName);
palFile.file_seek(8); // bypass the header info
palFile.file_read(palBuf, 256*3);
palFile.file_close();
//--- Create a Direct Draw Palette and associate it with the front buffer ---//
if( dd_pal == NULL ) {
for(int i=0; i<256; i++) {
pal_entry_buf[i].peRed = palBuf[i][0];
pal_entry_buf[i].peGreen = palBuf[i][1];
pal_entry_buf[i].peBlue = palBuf[i][2];
}
HRESULT rc = dd_obj->CreatePalette( DDPCAPS_8BIT, pal_entry_buf, &dd_pal, NULL );
if( rc != DD_OK )
return FALSE;
}
init_color_table();
init_gray_remap_table();
// set global variable
transparent_code_w = translate_color(TRANSPARENT_CODE);
return TRUE;
}
//---------- Begin of function VgaBuf::line -------------//
//
// Draw a line
//
// <int> x1,y1,x2,y2 = the coordination of the line
// <int> lineColor = color of the line
//
void VgaBuf::line(int x1,int y1,int x2,int y2,int lineColor)
{
if( is_front )
mouse.hide_area( x1,y1,x2,y2 ); // if the mouse cursor is in that area, hide it
IMGline(cur_buf_ptr, cur_pitch, buf_width(), buf_height(), x1, y1, x2, y2, translate_color(lineColor));
if( is_front )
mouse.show_area();
}
//------------- Begin of function VgaBuf::bar --------------//
//
// Draw a bar without bliting
//
// Syntax : bar( x1, y1, x2, y2, color )
//
// <int> x1,y1 - the top left vertex of the bar
// <int> x2,y2 - the bottom right vertex of the bar
// <int> color index - the index of a 256 color palette
//
void VgaBuf::bar(int x1,int y1,int x2,int y2,int colorCode)
{
err_when( !buf_locked );
if( is_front )
mouse.hide_area(x1,y1,x2,y2);
IMGbar(cur_buf_ptr, cur_pitch, x1, y1, x2, y2, translate_color(colorCode) );
if( is_front )
mouse.show_area();
}
//---------- Begin of function VgaBuf::line -------------//
//
// Draw a line
//
// <int> x1,y1,x2,y2 = the coordination of the line
// <int> lineColor = color of the line
//
void VgaBuf::line(int x1,int y1,int x2,int y2,int lineColor)
{
int dx = x2 - x1;
int dy = y2 - y1;
short *bufPtr = buf_ptr(x1,y1);
short color = translate_color(lineColor);
int d;
int inc_x = dx > 0 ? 1 : -1;
int inc_y = dy > 0 ? 1 : -1;
int lPitch = dy > 0 ? cur_pitch : -cur_pitch;
if( dy == 0)
{
if( x1 <= x2)
{
// from left to right
for(short x = x1; x <= x2; ++x, ++bufPtr)
*bufPtr = color;
}
else
{
// from right to left
for( short x = x1; x >= x2; --x, --bufPtr)
*bufPtr = color;
}
return;
}
if( dx == 0)
{
if( y1 <= y2)
{
// from top to bottom
for(short y = y1; y <= y2; ++y, bufPtr += lPitch)
*bufPtr = color;
}
else
{
// from bottom to top
for( short y = y1; y >= y2; --y, bufPtr -= lPitch)
*bufPtr = color;
}
return;
}
if( abs(dy) <= abs(dx) )
{
// draw gentle line
// use x as independent variable
dx = abs(dx);
dy = abs(dy);
d = 2 * dy - dx;
int x = x1-inc_x;
do
{
x += inc_x;
*bufPtr = translate_color(lineColor);
bufPtr += inc_x;
if( d >= 0)
{
// y increase by 1
bufPtr += lPitch;
d += 2 * (dy - dx);
}
else
{
// y remain unchange;
d += 2 * dy;
}
} while ( x != x2);
}
else
{
// draw steep line
// use y as independent variable
dx = abs(dx);
dy = abs(dy);
d = 2 * dx - dy;
int y = y1 - inc_y;
do
{
y += inc_y;
*bufPtr = translate_color(lineColor);
bufPtr += lPitch;
if( d >= 0)
{
// x increase by 1
bufPtr += inc_x;
d += 2 * (dx - dy);
}
else
{
// x remain unchange;
d += 2 * dx;
}
} while ( y != y2);
}
}
glm::vec3 Texture::getColour(glm::vec2 uv) const
{
return translate_color(getpixel(pixelData, uv.x*(float)width, uv.y*(float)height));
}
