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@ -4,6 +4,10 @@
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#include <notcurses/direct.h>
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#include "internal.h"
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// update for a new visual area of |rows|x|cols|, neither of which may be zero.
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// copies that area of the lastframe (damage map) which is shared between the
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// two. new areas are initialized to empty, just like a new plane. lost areas
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// have their egcpool entries purged.
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static nccell*
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restripe_lastframe(notcurses* nc, int rows, int cols){
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assert(rows);
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@ -13,7 +17,8 @@ restripe_lastframe(notcurses* nc, int rows, int cols){
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if(tmp == NULL){
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return NULL;
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}
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size_t maxlinecopy = sizeof(nccell) * (nc->lfdimx > cols ? cols : nc->lfdimx);
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size_t copycols = nc->lfdimx > cols ? cols : nc->lfdimx;
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size_t maxlinecopy = sizeof(nccell) * copycols;
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size_t minlineset = sizeof(nccell) * cols - maxlinecopy;
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unsigned zorch = nc->lfdimx > cols ? nc->lfdimx - cols : 0;
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for(int y = 0 ; y < rows ; ++y){
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@ -22,11 +27,11 @@ restripe_lastframe(notcurses* nc, int rows, int cols){
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memcpy(&tmp[cols * y], &nc->lastframe[nc->lfdimx * y], maxlinecopy);
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}
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if(minlineset){
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memset(&tmp[cols * y + maxlinecopy / sizeof(nccell)], 0, minlineset);
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memset(&tmp[cols * y + copycols], 0, minlineset);
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}
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// excise any egcpool entries from the right of the new plane area
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if(zorch){
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for(unsigned x = maxlinecopy ; x < maxlinecopy + zorch ; ++x){
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for(unsigned x = copycols ; x < copycols + zorch ; ++x){
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pool_release(&nc->pool, &nc->lastframe[fbcellidx(y, nc->lfdimx, x)]);
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}
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}
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