group__draw__fns.htm

MINIGUI1.6开发API

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<a class="anchor" name="ga31" doxytag="gdi.h::BitmapDDAScaler2"></a><p>
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          <td class="md" nowrap valign="top"><a class="el" href="group__simple__types.htm#ga0">BOOL</a> GUIAPI BitmapDDAScaler2           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">void *&nbsp;</td>
          <td class="mdname" nowrap> <em>context</em>, </td>
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          <td class="md"></td>
          <td class="md" nowrap>const <a class="el" href="struct__BITMAP.htm">BITMAP</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>src_bmp</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>dst_w</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>dst_h</em>, </td>
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          <td class="md" nowrap><a class="el" href="group__draw__fns.htm#ga7">CB_GET_LINE_BUFF</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>cb_get_line_buff</em>, </td>
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          <td class="md" nowrap><a class="el" href="group__draw__fns.htm#ga8">CB_LINE_SCALED</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>cb_line_scaled</em></td>
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          <td class="md">)&nbsp;</td>
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<p>
A bitmap scaler using DDA algorithm. 
<p>
This function is a general bitmap scaler using DDA algorithm. This function scales the bitmap from bottom to top.<p>
MiniGUI implements StretchBlt functions by using this scaler.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>context</em>&nbsp;</td><td>The context will be passed to the callbacks. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>src_bmp</em>&nbsp;</td><td>The source BITMAP object. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>dst_w</em>&nbsp;</td><td>The width of the destination BITMAP object. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>dst_h</em>&nbsp;</td><td>The height of the destination BITMAP object. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>cb_get_line_buff</em>&nbsp;</td><td>The callback to get the line buffer of the destination BITMAP object. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>cb_line_scaled</em>&nbsp;</td><td>The callback to tell the line is scaled.</td></tr>
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<dl compact><dt><b>Note:</b></dt><dd>Only defined for _USE_NEWGAL</dd></dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__bmp__fns.htm#ga5">ScaleBitmap</a>, <a class="el" href="group__bmp__fns.htm#ga4">StretchBlt</a>, <a class="el" href="group__draw__fns.htm#ga30">BitmapDDAScaler</a> </dd></dl>
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<a class="anchor" name="ga37" doxytag="gdi.h::Circle"></a><p>
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          <td class="md" nowrap valign="top">void GUIAPI Circle           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__handles.htm#ga2">HDC</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>hdc</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>sx</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>sy</em>, </td>
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          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>r</em></td>
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          <td class="md"></td>
          <td class="md">)&nbsp;</td>
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<p>
Draws a circle. 
<p>
This function draws a circle with the zero pen on the DC <em>hdc</em>. The center of the circle is at <em></em>(sx, sy), and the radius is <em>r</em>.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>hdc</em>&nbsp;</td><td>The device context. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>sx</em>&nbsp;</td><td>sx,sy: The center of the circle. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>sy</em>&nbsp;</td><td>sx,sy: The center of the circle. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>r</em>&nbsp;</td><td>The radius of the circle.</td></tr>
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<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__draw__fns.htm#ga23">CircleGenerator</a> </dd></dl>
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<a class="anchor" name="ga39" doxytag="gdi.h::CircleArc"></a><p>
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          <td class="md" nowrap valign="top">void GUIAPI CircleArc           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__handles.htm#ga2">HDC</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>hdc</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>sx</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>sy</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>r</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>ang1</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>ang2</em></td>
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          <td class="md">)&nbsp;</td>
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<p>
Draws an arc. 
<p>
This function draws an arc with the zero pen on the DC <em>hdc</em>. The center of the arc is at <em></em>(sx, sy), the radius is <em>r</em>, and the radians of start angle and end angle are <em>ang1</em> and <em>ang2</em> respectively.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td valign="top"></td><td valign="top"><em>hdc</em>&nbsp;</td><td>The device context. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>sx</em>&nbsp;</td><td>sx,sy: The center of the arc. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>sy</em>&nbsp;</td><td>sx,sy: The center of the arc. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>r</em>&nbsp;</td><td>The radius of the arc. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>ang1</em>&nbsp;</td><td>The start angle of the arc, relative to the 3 o'clock position, counter-clockwise, in 1/64ths of a degree. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>ang2</em>&nbsp;</td><td>The end angle of the arc, relative to angle1, in 1/64ths of a degree.</td></tr>
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</dl>
<dl compact><dt><b>Note:</b></dt><dd>Only defined for _USE_NEWGAL</dd></dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__draw__fns.htm#ga25">CircleArcGenerator</a>, <a class="el" href="group__fixed__math__fns.htm">Fixed point math functions</a>, <a class="el" href="group__dc__attrs.htm">DC attribute operations</a> </dd></dl>
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<a class="anchor" name="ga25" doxytag="gdi.h::CircleArcGenerator"></a><p>
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          <td class="md" nowrap valign="top">void GUIAPI CircleArcGenerator           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">void *&nbsp;</td>
          <td class="mdname" nowrap> <em>context</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>sx</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>sy</em>, </td>
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          <td class="md" nowrap align="right"></td>
          <td class="md"></td>
          <td class="md" nowrap>int&nbsp;</td>
          <td class="mdname" nowrap> <em>r</em>, </td>
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