diff options
Diffstat (limited to 'src/gallium/auxiliary/draw/draw_vs.c')
| -rw-r--r-- | src/gallium/auxiliary/draw/draw_vs.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/src/gallium/auxiliary/draw/draw_vs.c b/src/gallium/auxiliary/draw/draw_vs.c index 57ea63f..fb665b0 100644 --- a/src/gallium/auxiliary/draw/draw_vs.c +++ b/src/gallium/auxiliary/draw/draw_vs.c @@ -48,18 +48,30 @@ DEBUG_GET_ONCE_BOOL_OPTION(gallium_dump_vs, "GALLIUM_DUMP_VS", FALSE) + +/** + * Set a vertex shader constant buffer. + * \param slot which constant buffer in [0, PIPE_MAX_CONSTANT_BUFFERS-1] + * \param constants the mapped buffer + * \param size size of buffer in bytes + */ void draw_vs_set_constants(struct draw_context *draw, unsigned slot, const void *constants, unsigned size) { - if (((uintptr_t)constants) & 0xf) { + const int alignment = 16; + + /* check if buffer is 16-byte aligned */ + if (((uintptr_t)constants) & (alignment - 1)) { + /* if not, copy the constants into a new, 16-byte aligned buffer */ if (size > draw->vs.const_storage_size[slot]) { if (draw->vs.aligned_constant_storage[slot]) { align_free((void *)draw->vs.aligned_constant_storage[slot]); } - draw->vs.aligned_constant_storage[slot] = align_malloc(size, 16); + draw->vs.aligned_constant_storage[slot] = + align_malloc(size, alignment); } assert(constants); memcpy((void *)draw->vs.aligned_constant_storage[slot], |