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Review to avoid UBSAN complaining #1891

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This commit is contained in:
Ray 2023-09-07 18:00:10 +02:00
parent 18e9784c6d
commit 30a9a24db9
1 changed files with 10 additions and 2 deletions
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12
src/rlgl.h
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@ -3687,7 +3687,11 @@ void rlDrawVertexArray(int offset, int count)
// Draw vertex array elements
void rlDrawVertexArrayElements(int offset, int count, const void *buffer)
{
glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_SHORT, (const unsigned short *)buffer + offset);
// NOTE: Added pointer math separately from function to avoid UBSAN complaining
unsigned short *bufferPtr = (unsigned short *)buffer;
if (offset > 0) bufferPtr += offset;
glDrawElements(GL_TRIANGLES, count, GL_UNSIGNED_SHORT, (const unsigned short *)bufferPtr);
}
// Draw vertex array instanced
@ -3702,7 +3706,11 @@ void rlDrawVertexArrayInstanced(int offset, int count, int instances)
void rlDrawVertexArrayElementsInstanced(int offset, int count, const void *buffer, int instances)
{
#if defined(GRAPHICS_API_OPENGL_33) || defined(GRAPHICS_API_OPENGL_ES2)
glDrawElementsInstanced(GL_TRIANGLES, count, GL_UNSIGNED_SHORT, (const unsigned short *)buffer + offset, instances);
// NOTE: Added pointer math separately from function to avoid UBSAN complaining
unsigned short *bufferPtr = (unsigned short *)buffer;
if (offset > 0) bufferPtr += offset;
glDrawElementsInstanced(GL_TRIANGLES, count, GL_UNSIGNED_SHORT, (const unsigned short *)bufferPtr, instances);
#endif
}