/*
* Basic graphics routines.
*/
void gfx_hline(int x1, int x2, int y, int color, int flags)
{
int x;
if (flags & GFX_XOR_PIXEL)
{
for (x = x1; x < x2; x++)
{
vga_setcolor(color ^ vga_getpixel(x, y));
vga_drawpixel(x, y);
}
}
else
{
vga_setcolor(color);
for (x = x1; x < x2; x++)
vga_drawpixel(x, y);
}
}
void gfx_vline(int y1, int y2, int x, int color, int flags)
{
int y;
if (flags & GFX_XOR_PIXEL)
{
for (y = y1; y < y2; y++)
{
vga_setcolor(color ^ vga_getpixel(x, y));
vga_drawpixel(x, y);
}
}
else
{
vga_setcolor(color);
for (y = y1; y < y2; y++)
vga_drawpixel(x, y);
}
}
void DrawBrick(int x, int y, int color)
/* Disegna a video il mattone alle coordinate x, y, con uno dei colori */
/* definiti nell'enumerazione "colortype", attingendo a tutte le */
/* informazioni di colore definite precedentemente. */
{
int i;
for(i=0;i<NUM_PIXEL_MATTONI;i++) {
if(color == OMBRA) vga_setcolor(0);
else vga_setcolor(MattColor[color][Mattoni[i].colortype]);
vga_drawpixel(x+Mattoni[i].addx, y+Mattoni[i].addy);
}
}
int main(int argc, char *argv[])
{
int i;
int oldmode;
int mode = G320x200x256;
int width, height, colors;
//获得当前的模式
oldmode = vga_getcurrentmode();
//初始化
vga_init();
//判断是否支持该模式
if(vga_hasmode(mode))
vga_setmode(mode);
else {
printf("No such mode\n");
exit(1);
}
//取得信息
width = vga_getxdim();
height = vga_getydim();
colors = vga_getcolors();
//绘图
for(i=0; i<colors; i++){
vga_setcolor(i);
vga_drawline(0, i, width-1, i);
}
vga_setcolor(3);
for(i=0; i<50; i++) vga_drawpixel(i*4, 20);
vga_setcolor(4);
vga_drawline(100, 100, 300, 200);
vga_setcolor(5);
vga_drawline(0, 0, width-1, 0);
vga_drawline(0, height-1, width-1, height-1);
vga_drawline(0, 0, 0, height-1);
vga_drawline(width-1, 0, width-1, height-1);
//等待按键
while(!vga_getkey());
//恢复原来的模式
vga_setmode(oldmode);
return 0;
}
static void
drawSquares(int const xmax, int const ymax)
{
unsigned int const center_x = xmax/2;
/* The column just to the left of the center (assuming
even number of columns)
*/
unsigned int const center_y = ymax/2;
/* The line just above the center (assuming
even number of lines)
*/
int x;
for (x = 0; x < 64; x++) {
int y;
for (y = 0; y < 64; y++) {
/* Top 3 squares */
vga_setrgbcolor(x * 4 + 3, y * 4 + 3, 0);
vga_drawpixel(center_x - 32 - 32 - 64 + x, center_y - 80 + y);
vga_setrgbcolor(x * 4 + 3, 0, y * 4 + 3);
vga_drawpixel(center_x - 32 + x, center_y - 80 + y);
vga_setrgbcolor(0, x * 4 + 3, y * 4 + 3);
vga_drawpixel(center_x + 32 + 32 + x, center_y - 80 + y);
/* Bottom 3 squares */
vga_setrgbcolor(x * 4 + 3, y * 4 + 3, 255);
vga_drawpixel(center_x - 32 - 32 - 64 + x, center_y + 16 + y);
vga_setrgbcolor(x * 4 + 3, 255, y * 4 + 3);
vga_drawpixel(center_x - 32 + x, center_y + 16 + y);
vga_setrgbcolor(255, x * 4 + 3, y * 4 + 3);
vga_drawpixel(center_x + 32 + 32 + x, center_y + 16 + y);
}
}
}
void gfx_puttextimage(char *textimage, int base, char * text2color, int xpar, int width, int height, int xdst, int ydst)
{
int x, y, color;
int xlate[256];
for (x = 0; text2color[x]; x++)
xlate[(int)text2color[x]] = x + base;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
color = xlate[(int)*textimage++];
if (color != xpar)
{
vga_setcolor(color);
vga_drawpixel(x, y);
}
}
}
static void
SVGA_drawpixel(PSD psd,COORD x, COORD y, PIXELVAL c)
{
unsigned char gline, line;
if(gr_mode == MODE_SET) {
vga_setegacolor(c);
vga_drawpixel(x, y);
return;
}
/*
* This fishery is required because vgalib doesn't support
* xor drawing mode without acceleration.
*/
vga_getscansegment(&gline, x, y, 1);
line = c;
line ^= gline;
vga_drawscansegment(&line, x, y, 1);
}
void gfx_putimage(unsigned char *image, int xpar, int xsrc, int ysrc, int width, int height, int pitch, int xdst, int ydst)
{
int x, y;
image += ysrc * pitch + xsrc;
for (y = 0; y < height; y++)
{
if (xpar >= 0)
{
for (x = 0; x < width; x++)
if (image[x] != xpar)
{
vga_setcolor(image[x]);
vga_drawpixel(x, y);
}
}
else
vga_drawscansegment(image, xdst, ydst + y, width);
image += pitch;
}
}
void PutPixel(unsigned int x, unsigned int y, unsigned char color) {
vga_setcolor(color);
vga_drawpixel(x, y);
}
