Misc/abrash-black-book
Watch
1
0
Fork
You've already forked abrash-black-book
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Replace invalid characters with HTML entities

Browse source 
— with —
’ with ’
+ with +
× with x
ç with ç
“ with “
” with ”
‘ with ‘
• with •
– with -
µ with µ
† with †
Fix C++
θ with θ
Yen symbol instead of times
Fix broken apos
Bullet again
E-circumflex
This commit is contained in:
James Gregory 2013-12-30 12:50:32 +11:00
commit 500e7f5654
353 changed files with 5091 additions and 5091 deletions
Download patch file Download diff file Expand all files Collapse all files

46
42-03.html
View file

@ -37,13 +37,13 @@
</CENTER>
<P><BR></P>
<H3><A NAME="Heading5"></A><FONT COLOR="#000077">Sample Wu Antialiasing</FONT></H3>
<P>The true test of any antialiasing technique is how good it looks, so let&#146;s have a look at Wu antialiasing in action. Listing 42.1 is a C implementation of Wu antialiasing. Listing 42.2 is a sample program that draws a variety of Wu-antialiased lines, followed by non-antialiased lines, for comparison. Listing 42.3 contains <B>DrawPixel()</B> and <B>SetMode()</B> functions for mode 13H, the VGA&#146;s 320&#215;200 256-color mode. Finally, Listing 42.4 is a simple, non-antialiased line-drawing routine. Link these four listings together and run the resulting program to see both Wu-antialiased and non-antialiased lines.</P>
<P>The true test of any antialiasing technique is how good it looks, so let&rsquo;s have a look at Wu antialiasing in action. Listing 42.1 is a C implementation of Wu antialiasing. Listing 42.2 is a sample program that draws a variety of Wu-antialiased lines, followed by non-antialiased lines, for comparison. Listing 42.3 contains <B>DrawPixel()</B> and <B>SetMode()</B> functions for mode 13H, the VGA&rsquo;s 320x200 256-color mode. Finally, Listing 42.4 is a simple, non-antialiased line-drawing routine. Link these four listings together and run the resulting program to see both Wu-antialiased and non-antialiased lines.</P>
<P><B>LISTING 42.2 L42-2.C</B></P>
<!-- CODE //-->
<PRE>
/* Sample line-drawing program to demonstrate Wu antialiasing. Also draws
* non-antialiased lines for comparison.
* Tested with Borland C&#43;&#43; in C compilation mode and the small model.
* Tested with Borland C++ in C compilation mode and the small model.
*/
#include &lt;dos.h&gt;
#include &lt;conio.h&gt;
@ -76,24 +76,24 @@ void main()
/* Draw Wu-antialiased lines in all directions */
SetMode();
SetPalette(WuColors);
for (i=5; i&lt;ScreenWidthInPixels; i &#43;= 10) {
DrawWuLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10&#43;i/5,
for (i=5; i&lt;ScreenWidthInPixels; i += 10) {
DrawWuLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10+i/5,
ScreenHeightInPixels/5, i, ScreenHeightInPixels-1,
WuColors[WU_BLUE].BaseColor, WuColors[WU_BLUE].NumLevels,
WuColors[WU_BLUE].IntensityBits);
}
for (i=0; i&lt;ScreenHeightInPixels; i &#43;= 10) {
for (i=0; i&lt;ScreenHeightInPixels; i += 10) {
DrawWuLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10, i/5, 0, i,
WuColors[WU_BLUE].BaseColor, WuColors[WU_BLUE].NumLevels,
WuColors[WU_BLUE].IntensityBits);
}
for (i=0; i&lt;ScreenHeightInPixels; i &#43;= 10) {
DrawWuLine(ScreenWidthInPixels/2&#43;ScreenWidthInPixels/10, i/5,
for (i=0; i&lt;ScreenHeightInPixels; i += 10) {
DrawWuLine(ScreenWidthInPixels/2+ScreenWidthInPixels/10, i/5,
ScreenWidthInPixels-1, i, WuColors[WU_BLUE].BaseColor,
WuColors[WU_BLUE].NumLevels, WuColors[WU_BLUE].IntensityBits);
}
for (i=0; i&lt;ScreenWidthInPixels; i &#43;= 10) {
DrawWuLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10&#43;i/5,
for (i=0; i&lt;ScreenWidthInPixels; i += 10) {
DrawWuLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10+i/5,
ScreenHeightInPixels, i, 0, WuColors[WU_WHITE].BaseColor,
WuColors[WU_WHITE].NumLevels,
WuColors[WU_WHITE].IntensityBits);
@ -103,21 +103,21 @@ void main()
/* Now clear the screen and draw non-antialiased lines */
SetMode();
SetPalette(WuColors);
for (i=0; i&lt;ScreenWidthInPixels; i &#43;= 10) {
DrawLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10&#43;i/5,
for (i=0; i&lt;ScreenWidthInPixels; i += 10) {
DrawLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10+i/5,
ScreenHeightInPixels/5, i, ScreenHeightInPixels-1,
WuColors[WU_BLUE].BaseColor);
}
for (i=0; i&lt;ScreenHeightInPixels; i &#43;= 10) {
for (i=0; i&lt;ScreenHeightInPixels; i += 10) {
DrawLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10, i/5, 0, i,
WuColors[WU_BLUE].BaseColor);
}
for (i=0; i&lt;ScreenHeightInPixels; i &#43;= 10) {
DrawLine(ScreenWidthInPixels/2&#43;ScreenWidthInPixels/10, i/5,
for (i=0; i&lt;ScreenHeightInPixels; i += 10) {
DrawLine(ScreenWidthInPixels/2+ScreenWidthInPixels/10, i/5,
ScreenWidthInPixels-1, i, WuColors[WU_BLUE].BaseColor);
}
for (i=0; i&lt;ScreenWidthInPixels; i &#43;= 10) {
DrawLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10&#43;i/5,
for (i=0; i&lt;ScreenWidthInPixels; i += 10) {
DrawLine(ScreenWidthInPixels/2-ScreenWidthInPixels/10+i/5,
ScreenHeightInPixels, i, 0, WuColors[WU_WHITE].BaseColor);
}
getch(); /* wait for a key press */
@ -147,14 +147,14 @@ void SetPalette(struct WuColor * WColors)
47, 48, 48, 49, 49, 50, 51, 51, 52, 52, 53, 53, 54, 54, 55, 55,
56, 56, 57, 57, 58, 58, 59, 59, 60, 60, 61, 61, 62, 62, 63, 63};
for (i=0; i&lt;NUM_WU_COLORS; i&#43;&#43;) {
for (j=0; j&lt;WColors[i].NumLevels; j&#43;&#43;) {
for (i=0; i&lt;NUM_WU_COLORS; i++) {
for (j=0; j&lt;WColors[i].NumLevels; j++) {
PaletteBlock[j][0] = GammaTable[((double)WColors[i].MaxRed * (1.0 -
(double)j / (double)(WColors[i].NumLevels - 1))) &#43; 0.5];
(double)j / (double)(WColors[i].NumLevels - 1))) + 0.5];
PaletteBlock[j][1] = GammaTable[((double)WColors[i].MaxGreen * (1.0 -
(double)j / (double)(WColors[i].NumLevels - 1))) &#43; 0.5];
(double)j / (double)(WColors[i].NumLevels - 1))) + 0.5];
PaletteBlock[j][2] = GammaTable[((double)WColors[i].MaxBlue * (1.0 -
(double)j / (double)(WColors[i].NumLevels - 1))) &#43; 0.5];
(double)j / (double)(WColors[i].NumLevels - 1))) + 0.5];
}
/* Now set up the palette to do Wu antialiasing for this color */
regset.x.ax = 0x1012; /* set block of DAC registers function */
@ -172,7 +172,7 @@ void SetPalette(struct WuColor * WColors)
<!-- CODE //-->
<PRE>
/* VGA mode 13h pixel-drawing and mode set functions.
* Tested with Borland C&#43;&#43; in C compilation mode and the small model.
* Tested with Borland C++ in C compilation mode and the small model.
*/
#include &lt;dos.h&gt;
@ -187,7 +187,7 @@ void DrawPixel(int X, int Y, int Color)
unsigned char far *ScreenPtr;
FP_SEG(ScreenPtr) = SCREEN_SEGMENT;
FP_OFF(ScreenPtr) = (unsigned int) Y * ScreenWidthInPixels &#43; X;
FP_OFF(ScreenPtr) = (unsigned int) Y * ScreenWidthInPixels + X;
*ScreenPtr = Color;
}