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Keep header pointer updated. Fixes #25 (hopefully...)

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This commit is contained in:
Luke Benstead 2018-09-19 17:11:56 +01:00
parent e36f561ec0
commit 52e1be498e
1 changed files with 7 additions and 3 deletions
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10
GL/draw.c
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@ -786,6 +786,9 @@ static void submitVertices(GLenum mode, GLsizei first, GLsizei count, GLenum typ
/* Store a pointer to the header for later */
PVRHeader* header = (PVRHeader*) start++;
/* We store an offset to the first ClipVertex because clipping may generate more
* vertices, which may cause a realloc and thus invalidate start and header
* we use this startOffset to reset those pointers after clipping */
uint32_t startOffset = start - (ClipVertex*) activeList->vector.data;
profiler_checkpoint("allocate");
@ -822,6 +825,10 @@ static void submitVertices(GLenum mode, GLsizei first, GLsizei count, GLenum typ
spaceNeeded = clip(&activeList->vector, offset, spaceNeeded);
/* Clipping may have realloc'd so reset the start pointer */
start = ((ClipVertex*) activeList->vector.data) + startOffset;
header = start - 1; /* Update the header pointer */
#if DEBUG_CLIPPING
fprintf(stderr, "--------\n");
for(i = offset; i < activeList->vector.size; ++i) {
@ -838,9 +845,6 @@ static void submitVertices(GLenum mode, GLsizei first, GLsizei count, GLenum typ
profiler_checkpoint("clip");
/* Clipping may have realloc'd so reset the start pointer */
start = ((ClipVertex*) activeList->vector.data) + startOffset;
divide(start, spaceNeeded);
profiler_checkpoint("divide");