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 testmode(int mode) { int xmax, ymax, i, x, y, yw, ys, c; vga_modeinfo *modeinfo; vga_setmode(mode); modeinfo = vga_getmodeinfo(mode); printf("Width: %d Height: %d Colors: %d\n", modeinfo->width, modeinfo->height, modeinfo->colors); printf("DisplayStartRange: %xh Maxpixels: %d Blit: %s\n", modeinfo->startaddressrange, modeinfo->maxpixels, modeinfo->haveblit ? "YES" : "NO"); #ifdef TEST_MODEX if (modeinfo->colors == 256) printf("Switching to ModeX ... %s\n", (vga_setmodeX()? "done" : "failed")); #endif vga_screenoff(); xmax = vga_getxdim() - 1; ymax = vga_getydim() - 1; vga_setcolor(vga_white()); vga_drawline(0, 0, xmax, 0); vga_drawline(xmax, 0, xmax, ymax); vga_drawline(xmax, ymax, 0, ymax); vga_drawline(0, ymax, 0, 0); /* Draw crosses */ for (i = 0; i <= 15; i++) { vga_setegacolor(i); vga_drawline(10 + i * 5, 10, 89 + i * 5, 89); } for (i = 0; i <= 15; i++) { vga_setegacolor(i); vga_drawline(89 + i * 5, 10, 10 + i * 5, 89); } vga_screenon(); ys = 100; yw = (ymax - 100) / 4; switch (vga_getcolors()) { case 256: /* Draw horizontal color bands using palette */ for (i = 0; i < 60; ++i) { c = (i * 64) / 60; vga_setpalette(i + 16, c, c, c); vga_setpalette(i + 16 + 60, c, 0, 0); vga_setpalette(i + 16 + (2 * 60), 0, c, 0); vga_setpalette(i + 16 + (3 * 60), 0, 0, c); } line[0] = line[xmax] = 15; line[1] = line[xmax - 1] = 0; for (x = 2; x < xmax - 1; ++x) line[x] = (((x - 2) * 60) / (xmax - 3)) + 16; for (y = ys; y < ys + yw; ++y) /* gray */ vga_drawscanline(y, line); for (x = 2; x < xmax - 1; ++x) line[x] += 60; ys += yw; for (y = ys; y < ys + yw; ++y) /* red */ vga_drawscanline(y, line); for (x = 2; x < xmax - 1; ++x) line[x] += 60; ys += yw; for (y = ys; y < ys + yw; ++y) /* green */ vga_drawscanline(y, line); for (x = 2; x < xmax - 1; ++x) line[x] += 60; ys += yw; for (y = ys; y < ys + yw; ++y) /* blue */ vga_drawscanline(y, line); break; case 1 << 15: case 1 << 16: case 1 << 24: /* Draw horizontal color bands in RGB */ for (x = 2; x < xmax - 1; ++x) { c = ((x - 2) * 255) / (xmax - 4); y = ys; vga_setrgbcolor(c, c, c); vga_drawline(x, y, x, y + yw - 1); y += yw; vga_setrgbcolor(c, 0, 0); vga_drawline(x, y, x, y + yw - 1); y += yw; vga_setrgbcolor(0, c, 0); vga_drawline(x, y, x, y + yw - 1); y += yw; vga_setrgbcolor(0, 0, c); vga_drawline(x, y, x, y + yw - 1); } drawSquares(xmax, ymax); break; default: /* Draw vertical color bars */ if (vga_getcolors() == 16) { for (i = 0; i < xmax - 1; i++) line[i] = (i + 2) % 16; line[0] = line[xmax] = 15; line[1] = line[xmax - 1] = 0; } if (vga_getcolors() == 2) { for (i = 0; i <= xmax; i++) line[i] = 0x11; line[0] = 0x91; } for (i = 100; i < ymax - 1; i++) vga_drawscanline(i, line); break; } if (getchar() == 'd') vga_dumpregs(); }