diff options
| -rw-r--r-- | src/mesa/main/buffers.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c index d8b5f3b1f4a..b5acda8823c 100644 --- a/src/mesa/main/buffers.c +++ b/src/mesa/main/buffers.c @@ -344,7 +344,7 @@ _mesa_DrawBuffersARB(GLsizei n, const GLenum *buffers) /** * Helper function to set the GL_DRAW_BUFFER state in the context and - * current FBO. + * current FBO. Called via glDrawBuffer(), glDrawBuffersARB() * * All error checking will have been done prior to calling this function * so nothing should go wrong at this point. @@ -392,6 +392,8 @@ _mesa_drawbuffers(GLcontext *ctx, GLuint n, const GLenum *buffers, GLuint buf, count = 0; for (buf = 0; buf < n; buf++ ) { if (destMask[buf]) { + /* only one bit should be set in the destMask[buf] field */ + ASSERT(_mesa_bitcount(destMask[buf]) == 1); fb->_ColorDrawBufferIndexes[buf] = _mesa_ffs(destMask[buf]) - 1; fb->ColorDrawBuffer[buf] = buffers[buf]; count = buf + 1; |