Gered
83aaf0d5b9
borland conditionals have been removed. asm sources converted fully to tasm ideal mode. keyboard and timer interrupt handlers moved to c code copied from fdemo watcom sources
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
#include <stdio.h>
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#include <string.h>
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#include "ack3d.h"
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#include "ackeng.h"
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//±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±
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// Creates an overlay buffer that contains non-transparent information
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// about the image. Position and length of the non-transparent areas is
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// stored for later processing after the drawing phase. Theoretically the
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// amount of information stored in the overlay buffer could exceed the
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// actual size of the image.
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//±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±±
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short AckCreateOverlay(ACKENG *ae,UCHAR *sBuf)
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{
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USHORT bPos,vPos,vLen;
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USHORT len,sPos,sPos1;
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vLen = (ae->WinEndY - ae->WinStartY) * BYTES_PER_ROW;
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vPos = ae->WinStartY * BYTES_PER_ROW;
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bPos = 0;
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sPos = vPos;
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while (vLen > 0)
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{
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if (sBuf[sPos])
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{
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sPos1 = sPos;
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while (vLen > 0 && sBuf[sPos1++])
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vLen--;
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len = (sPos1 - sPos) - 1;
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(*(short *)&ae->ScreenBuffer[bPos]) = len;
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bPos += 2;
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(*(short *)&ae->ScreenBuffer[bPos]) = sPos;
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bPos += 2;
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memmove(&ae->ScreenBuffer[bPos],&sBuf[sPos],len);
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bPos += len;
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sPos = sPos1;
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}
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else
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{
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sPos++;
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vLen--;
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}
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}
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(*(short *)&ae->ScreenBuffer[bPos]) = 0;
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bPos += 2;
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ae->OverlayBuffer = AckMalloc(bPos);
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if (ae->OverlayBuffer != NULL)
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{
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memmove(ae->OverlayBuffer,ae->ScreenBuffer,bPos);
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return(0);
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}
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return(ERR_NOMEMORY);
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}
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// **** End of Source ****
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