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correctly implement placement

pull/1/head
cosmonaut 2022-07-21 16:01:11 -07:00
parent d86e094933
commit 2b9a708ceb
1 changed files with 112 additions and 84 deletions
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182
src/cram.c
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@ -118,7 +118,6 @@ typedef struct PackScoreInfo
int32_t secondaryScore;
int32_t x;
int32_t y;
int32_t freeRectIndex;
} PackScoreInfo;
/* Pixel data functions */
@ -250,7 +249,8 @@ void Cram_Internal_Score(
PackScoreInfo *scoreInfo
) {
Rect *freeRect;
int32_t topSideY;
int32_t areaFit;
int32_t shortestSide;
int32_t i;
scoreInfo->score = INT32_MAX;
@ -262,12 +262,13 @@ void Cram_Internal_Score(
if (freeRect->w >= width && freeRect->h >= height)
{
topSideY = freeRect->y + height;
if (topSideY < scoreInfo->score || (topSideY == scoreInfo->score && freeRect->x < scoreInfo->secondaryScore))
areaFit = freeRect->w * freeRect->h - width * height;
shortestSide = Cram_min(freeRect->w - width, freeRect->h - height);
if (areaFit < scoreInfo->score || (areaFit == scoreInfo->score && shortestSide < scoreInfo->secondaryScore))
{
scoreInfo->score = topSideY;
scoreInfo->secondaryScore = freeRect->x;
scoreInfo->freeRectIndex = i;
scoreInfo->score = areaFit;
scoreInfo->secondaryScore = shortestSide;
scoreInfo->x = freeRect->x;
scoreInfo->y = freeRect->y;
}
@ -275,71 +276,6 @@ void Cram_Internal_Score(
}
}
static inline void Cram_Internal_AddFreeRect(RectPackContext *context, Rect rect)
{
if (context->freeRectangleCount == context->freeRectangleCapacity)
{
context->freeRectangleCapacity *= 2;
context->freeRectangles = Cram_realloc(context->freeRectangles, sizeof(Rect) * context->freeRectangleCapacity);
}
context->freeRectangles[context->freeRectangleCount] = rect;
context->freeRectangleCount += 1;
}
void Cram_Internal_PlaceRect(RectPackContext *context, Rect *rect, int32_t freeRectIndex)
{
Rect freeRect = context->freeRectangles[freeRectIndex];
Rect newRect;
/* plug the hole */
context->freeRectangles[freeRectIndex] = context->freeRectangles[context->freeRectangleCount - 1];
context->freeRectangleCount -= 1;
/* now we maybe have new free rectangles! */
/* NOTE: free rectangles can overlap. */
if (rect->y < freeRect.y + freeRect.h && rect->y + rect->h > freeRect.y)
{
/* Left side */
if (rect->x > freeRect.x && rect->x < freeRect.x + freeRect.w)
{
newRect = freeRect;
newRect.w = rect->x - freeRect.x;
Cram_Internal_AddFreeRect(context, newRect);
}
/* Right side */
if (rect->x + rect->w < freeRect.x + freeRect.w)
{
newRect = freeRect;
newRect.x = rect->x + rect->w;
newRect.w = freeRect.x + freeRect.w - (rect->x + rect->w);
Cram_Internal_AddFreeRect(context, newRect);
}
}
if (rect->x < freeRect.x + freeRect.w && rect->x + rect->w > freeRect.x)
{
/* Top side */
if (rect->y > freeRect.y && rect->y < freeRect.y + freeRect.h)
{
newRect = freeRect;
newRect.h = rect->y - freeRect.y;
Cram_Internal_AddFreeRect(context, newRect);
}
/* Bottom side */
if (rect->y + rect->h < freeRect.y + freeRect.h)
{
newRect = freeRect;
newRect.y = rect->y + rect->h;
newRect.h = freeRect.y + freeRect.h - (rect->y + rect->h);
Cram_Internal_AddFreeRect(context, newRect);
}
}
}
static inline uint8_t Cram_Internal_Contains(Rect* a, Rect* b)
{
return b->x >= a->x &&
@ -380,6 +316,101 @@ void Cram_Internal_PruneRects(RectPackContext *context)
}
}
static inline void Cram_Internal_AddFreeRect(RectPackContext *context, Rect rect)
{
if (context->freeRectangleCount == context->freeRectangleCapacity)
{
context->freeRectangleCapacity *= 2;
context->freeRectangles = Cram_realloc(context->freeRectangles, sizeof(Rect) * context->freeRectangleCapacity);
}
context->freeRectangles[context->freeRectangleCount] = rect;
context->freeRectangleCount += 1;
}
uint8_t Cram_Internal_SplitRect(RectPackContext *context, Rect *rect, Rect *freeRect)
{
Rect newRect;
/* Test intersection */
if ( rect->x >= freeRect->x + freeRect->w ||
rect->y >= freeRect->y + freeRect->h ||
rect->x + rect->w <= freeRect->x ||
rect->y + rect->h <= freeRect->y )
{
return 0;
}
/* now we have new free rectangles! */
/* NOTE: free rectangles can overlap. */
if (rect->y < freeRect->y + freeRect->h && rect->y + rect->h > freeRect->y)
{
/* Left side */
if (rect->x > freeRect->x && rect->x < freeRect->x + freeRect->w)
{
newRect = *freeRect;
newRect.w = rect->x - freeRect->x;
Cram_Internal_AddFreeRect(context, newRect);
}
/* Right side */
if (rect->x + rect->w < freeRect->x + freeRect->w)
{
newRect = *freeRect;
newRect.x = rect->x + rect->w;
newRect.w = freeRect->x + freeRect->w - (rect->x + rect->w);
Cram_Internal_AddFreeRect(context, newRect);
}
}
if (rect->x < freeRect->x + freeRect->w && rect->x + rect->w > freeRect->x)
{
/* Top side */
if (rect->y > freeRect->y && rect->y < freeRect->y + freeRect->h)
{
newRect = *freeRect;
newRect.h = rect->y - freeRect->y;
Cram_Internal_AddFreeRect(context, newRect);
}
/* Bottom side */
if (rect->y + rect->h < freeRect->y + freeRect->h)
{
newRect = *freeRect;
newRect.y = rect->y + rect->h;
newRect.h = freeRect->y + freeRect->h - (rect->y + rect->h);
Cram_Internal_AddFreeRect(context, newRect);
}
}
return 1;
}
void Cram_Internal_PlaceRect(RectPackContext *context, Rect *rect)
{
Rect *freeRect;
int32_t i;
for (i = 0; i < context->freeRectangleCount;)
{
freeRect = &context->freeRectangles[i];
if (Cram_Internal_SplitRect(context, rect, freeRect))
{
/* plug the hole */
context->freeRectangles[i] = context->freeRectangles[context->freeRectangleCount - 1];
context->freeRectangleCount -= 1;
}
else
{
i += 1;
}
}
Cram_Internal_PruneRects(context);
}
/* Given rects with width and height, modifies rects with packed x and y positions. */
int8_t Cram_Internal_PackRects(RectPackContext *context, Rect *rects, uint32_t numRects)
{
@ -389,7 +420,7 @@ int8_t Cram_Internal_PackRects(RectPackContext *context, Rect *rects, uint32_t n
int32_t bestScore = INT32_MAX;
int32_t bestSecondaryScore = INT32_MAX;
PackScoreInfo scoreInfo;
int32_t bestRectIndex, bestX, bestY, bestFreeRectIndex;
int32_t bestRectIndex, bestX, bestY;
int32_t i, repeat;
for (i = 0; i < numRects; i += 1)
@ -412,7 +443,6 @@ int8_t Cram_Internal_PackRects(RectPackContext *context, Rect *rects, uint32_t n
bestScore = scoreInfo.score;
bestSecondaryScore = scoreInfo.secondaryScore;
bestRectIndex = i;
bestFreeRectIndex = scoreInfo.freeRectIndex;
bestX = scoreInfo.x;
bestY = scoreInfo.y;
}
@ -427,13 +457,11 @@ int8_t Cram_Internal_PackRects(RectPackContext *context, Rect *rects, uint32_t n
rectPtr = rectsToPack[bestRectIndex];
rectPtr->x = bestX;
rectPtr->y = bestY;
Cram_Internal_PlaceRect(context, rectPtr, bestFreeRectIndex);
Cram_Internal_PlaceRect(context, rectPtr);
/* plug the hole */
rectsToPack[bestRectIndex] = rectsToPack[rectsToPackCount - 1];
rectsToPackCount -= 1;
Cram_Internal_PruneRects(context);
}
Cram_free(rectsToPack);