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Fix #36700, z-depth not rendering properly at (n*256)+1 dimensions.

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The chunk indices for scheduling chunks based on a given area were calculated incorrectly. This caused chunks at the very border of the render (pixels 256..257) to be omitted, leading to incorrect values
in the Z buffer of the test file, which in turn caused wrong normalization range and the resulting almost-white image.
Also added a dedicated executePixel function for Z buffer to avoid any interpolation of Z values.
This commit is contained in:
Lukas Toenne
2013-09-11 17:34:32 +00:00
parent d396bd92ee
commit ba68fea78b
4 changed files with 30 additions and 12 deletions
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18
source/blender/compositor/intern/COM_ExecutionGroup.cpp
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@@ -518,17 +518,15 @@ bool ExecutionGroup::scheduleAreaWhenPossible(ExecutionSystem *graph, rcti *area
// find all chunks inside the rect
// determine minxchunk, minychunk, maxxchunk, maxychunk where x and y are chunknumbers
float chunkSizef = this->m_chunkSize;
int indexx, indexy;
int minxchunk = floor((area->xmin - this->m_viewerBorder.xmin) / chunkSizef);
int maxxchunk = ceil((area->xmax - 1) / chunkSizef);
int minychunk = floor((area->ymin - this->m_viewerBorder.ymin) / chunkSizef);
int maxychunk = ceil((area->ymax - 1) / chunkSizef);
minxchunk = max(minxchunk, 0);
minychunk = max(minychunk, 0);
maxxchunk = min(maxxchunk, (int)this->m_numberOfXChunks);
maxychunk = min(maxychunk, (int)this->m_numberOfYChunks);
int minxchunk = (area->xmin - m_viewerBorder.xmin) / m_chunkSize;
int maxxchunk = (area->xmax + m_chunkSize - 1) / m_chunkSize;
int minychunk = (area->ymin - m_viewerBorder.ymin) / m_chunkSize;
int maxychunk = (area->ymax + m_chunkSize - 1) / m_chunkSize;
minxchunk = max_ii(minxchunk, 0);
minychunk = max_ii(minychunk, 0);
maxxchunk = min_ii(maxxchunk, m_numberOfXChunks);
maxychunk = min_ii(maxychunk, m_numberOfYChunks);
bool result = true;
for (indexx = minxchunk; indexx < maxxchunk; indexx++) {