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feat(region): add SRgnOffsetf

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Adam Heinermann 2025-04-21 20:23:35 -07:00 • committed by fallenoak
parent c143493110
commit 27c08f7de2
3 changed files with 86 additions and 0 deletions
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22
storm/Region.cpp
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@ -568,3 +568,25 @@ int32_t SRgnIsRectInRegionf(HSRGN handle, const RECTF* rect) {
s_rgntable.Unlock(lockedHandle);
return result;
}
void SRgnOffsetf(HSRGN handle, float xoffset, float yoffset) {
STORM_VALIDATE_BEGIN;
STORM_VALIDATE(handle);
STORM_VALIDATE_END_VOID;
HLOCKEDRGN lockedHandle;
auto rgn = s_rgntable.Lock(handle, &lockedHandle, 0);
if (!rgn) return;
SOURCE* sourceArray = rgn->source.Ptr();
uint32_t sourceRects = rgn->source.Count();
for (uint32_t i = 0; i < sourceRects; i++) {
sourceArray[i].rect.left += xoffset;
sourceArray[i].rect.bottom += yoffset;
sourceArray[i].rect.right += xoffset;
sourceArray[i].rect.top += yoffset;
}
InvalidateRegion(rgn);
s_rgntable.Unlock(lockedHandle);
}

1
storm/Region.hpp
View file

@ -24,5 +24,6 @@ int32_t SRgnIsPointInRegionf(HSRGN handle, float x, float y);
int32_t SRgnIsRectInRegionf(HSRGN handle, const RECTF* rect);
void SRgnOffsetf(HSRGN handle, float xoffset, float yoffset);
#endif

63
test/Region.cpp
View file

@ -373,3 +373,66 @@ TEST_CASE("SRgnIsRectInRegionf", "[region]") {
CHECK_FALSE(SRgnIsRectInRegionf(region, &checkRects[5]));
}
}
TEST_CASE("SRgnOffsetf", "[region]") {
RgnDataTest region;
SECTION("shifts rects by given amount") {
RECTF rects[] = {
{ 0.0f, 0.0f, 100.0f, 100.0f },
{ -200.0f, -200.0f, -100.0f, -100.0f }
};
SRgnCombineRectf(region, &rects[0], nullptr, SRGN_OR);
SRgnCombineRectf(region, &rects[1], nullptr, SRGN_OR);
SRgnOffsetf(region, 100.0f, 50.0f);
uint32_t numRects = 2;
RECTF buffer[2];
SRgnGetRectsf(region, &numRects, buffer);
CHECK_THAT(buffer[0], MatchesRect({ -100.0f, -150.0f, 0.0f, -50.0f }));
CHECK_THAT(buffer[1], MatchesRect({ 100.0f, 50.0f, 200.0f, 150.0f }));
}
SECTION("shifts rects back to their original positions with opposite amounts") {
RECTF rects[] = {
{ 0.0f, 0.0f, 100.0f, 100.0f },
{ -200.0f, -200.0f, -100.0f, -100.0f }
};
SRgnCombineRectf(region, &rects[0], nullptr, SRGN_OR);
SRgnCombineRectf(region, &rects[1], nullptr, SRGN_OR);
SRgnOffsetf(region, 100.0f, 50.0f);
SRgnOffsetf(region, 5.0f, 10.0f);
SRgnOffsetf(region, -105.0f, -60.0f);
uint32_t numRects = 2;
RECTF buffer[2];
SRgnGetRectsf(region, &numRects, buffer);
CHECK_THAT(buffer[0], MatchesRect(rects[1]));
CHECK_THAT(buffer[1], MatchesRect(rects[0]));
}
SECTION("doesn't shift anything with 0") {
RECTF rects[] = {
{ 0.0f, 0.0f, 100.0f, 100.0f },
{ -200.0f, -200.0f, -100.0f, -100.0f }
};
SRgnCombineRectf(region, &rects[0], nullptr, SRGN_OR);
SRgnCombineRectf(region, &rects[1], nullptr, SRGN_OR);
SRgnOffsetf(region, 0.0f, 0.0f);
uint32_t numRects = 2;
RECTF buffer[2];
SRgnGetRectsf(region, &numRects, buffer);
CHECK_THAT(buffer[0], MatchesRect(rects[1]));
CHECK_THAT(buffer[1], MatchesRect(rects[0]));
}
}