From 2d11c48223adb78353ca32f0cc07941957310389 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Mon, 2 Nov 2009 12:58:51 -0700 Subject: mesa: added assertion, another comment --- src/mesa/main/buffers.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c index d8b5f3b1f4..b5acda8823 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; -- cgit v1.2.3