92 lines
2.0 KiB
C
92 lines
2.0 KiB
C
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#include <string.h>
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#include "log.h"
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#include "gfxtype.h"
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BOOL G_set_rect(PRECT rect, int left, int top, int right, int bottom)
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{
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rect->left = left;
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rect->top = top;
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rect->right = right;
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rect->bottom = bottom;
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return TRUE;
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}
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BOOL G_set_rect_empty(PRECT rect)
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{
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memset(rect, 0, sizeof(RECT));
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return TRUE;
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}
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BOOL G_inflate_rect(PRECT rect, int dx, int dy)
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{
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rect->left += dx;
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rect->top += dy;
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rect->right -= dx;
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rect->bottom -= dy;
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return TRUE;
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}
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BOOL G_offset_rect(PRECT rect, int dx, int dy)
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{
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rect->left += dx;
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rect->top += dy;
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rect->right += dx;
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rect->bottom += dy;
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return TRUE;
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}
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BOOL G_is_rect_empty(PCRECT rect)
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{
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return (rect->right <= rect.left) || (rect->bottom <= rect.top);
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}
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BOOL G_point_in_rect(PCRECT rect, PCPOINT pt)
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{
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return (rect->left <= pt->x) && (pt->x < rect->right) && (rect->top <= pt->y) && (pt->y < rect->bottom);
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}
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BOOL G_rect_equal(PCRECT rect1, PCRECT rect2)
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{
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return (memcmp(rect1, rect2, sizeof(RECT)) == 0);
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}
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BOOL G_rect_intersect(PRECT dest, PCRECT src1, PCRECT src2)
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{
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if (G_is_rect_empty(src1) || G_is_rect_empty(src2))
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{
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memset(dest, 0, sizeof(RECT));
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return FALSE;
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}
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if ((src1->left >= src2->right) || (src2->left >= src1->right) || (src1->top >= src2->bottom) || (src2->top >= src1->bottom))
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{
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memset(dest, 0, sizeof(RECT));
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return FALSE;
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}
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dest->left = MAX(src1->left, src2->left);
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dest->top = MAX(src1->top, src2->top);
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dest->right = MIN(src1->right, src2->right);
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dest->bottom = MIN(src1->bottom, src2->bottom);
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ASSERT(dest->left <= dest->right);
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ASSERT(dest->top <= dest->bottom);
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return TRUE;
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}
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BOOL G_rect_union(PRECT dest, PCRECT src1, PCRECT src2)
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{
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if (G_is_rect_empty(src1))
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{
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memcpy(dest, src2, sizeof(RECT));
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return !G_is_rect_empty(src2);
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}
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else if (G_is_rect_empty(src2))
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{
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memcpy(dest, src1, sizeof(RECT));
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return TRUE;
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}
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dest->left = MIN(src1->left, src2->left);
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dest->top = MIN(src1->top, src2->top);
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dest->right = MAX(src1->right, src2->right);
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dest->bottom = MAX(src1->bottom, src2->bottom);
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return TRUE;
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}
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