mirror of
https://github.com/isometimes/rpi4-osdev
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121 lines
2.3 KiB
C
121 lines
2.3 KiB
C
#include "../include/wgt.h"
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#include "../include/mem.h"
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// We should replace this with faster version (and xray needs to do the right thing - not sure memcpy is a good replacement)
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#define fastcopy memcpy
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#define putxray memcpy_xray
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block wnewblock (short x, short y, short x2, short y2)
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{
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block ptr,orig;
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int temp,width,height;
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int dispofs;
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int size;
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int ctr;
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width = abs (x - x2) + 1;
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height = abs (y - y2) + 1;
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size = 4 * ((int)width * (int)height) + 12;
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if (x2 < x)
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{
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temp = x; x = x2; x2 = temp;
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}
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if (y2 < y)
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{
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temp = y; y = y2; y2 = temp;
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}
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ptr = malloc (size);
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if (ptr == NULL)
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return NULL;
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orig = ptr;
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*ptr = width; /* store the width */
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ptr ++; /* and height */
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*ptr = height;
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ptr ++;
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dispofs = y * WGT_SYS.xres + x;
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temp = width;
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if (temp > WGT_SYS.xres)
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temp = WGT_SYS.xres;
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for (ctr = y; ctr <= y2; ctr++)
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{
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memcpy (ptr, &abuf[dispofs], temp);
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/* read off the screen */
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ptr += width;
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dispofs += WGT_SYS.xres;
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/* into the new ptr */
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}
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return orig;
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}
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block wallocblock (short width, short height)
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{
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block ptr,orig;
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int size;
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size = 4 * ((int)width * (int)height) + 12;
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ptr = malloc (size);
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if (ptr == NULL)
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return NULL;
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orig = ptr;
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*ptr = width; /* store the width */
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ptr ++;
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*ptr = height; /* and height */
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ptr ++;
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memset (ptr, 0, (size - 12) / 4);
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return orig;
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}
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void wputblock (short x, short y, block src, short method)
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{
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short width, height, display, maxy;
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short ctr;
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block dst;
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if (src == NULL)
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return;
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width = *src;
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src ++;
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height = *src;
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src ++;
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if (x + width > bx)
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display = (bx + 1) - x;
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else display = width;
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if (x < tx)
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{
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src += tx - x;
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display -= tx - x;
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x = tx;
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} /* clip x */
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if (display <= 0)
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return;
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maxy = y + height - 1;
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if (maxy > by)
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maxy = by;
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if (y < ty)
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{
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src += (ty - y)*width;
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y = ty;
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} /* clip y */
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dst = &abuf[y * WGT_SYS.xres + x];
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if (method == 0)
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for (ctr = y; ctr <= maxy; ctr++)
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{
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fastcopy (dst, src, display);
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src += width;
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dst += WGT_SYS.xres;
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}
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else
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for (ctr = y; ctr <= maxy; ctr++)
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{
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putxray (dst, src, display);
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src += width;
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dst += WGT_SYS.xres;
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}
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}
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