diff options
| -rw-r--r-- | src/mesa/swrast/s_stencil.c | 85 |
1 files changed, 35 insertions, 50 deletions
diff --git a/src/mesa/swrast/s_stencil.c b/src/mesa/swrast/s_stencil.c index 89991fad02..d0cbdd6917 100644 --- a/src/mesa/swrast/s_stencil.c +++ b/src/mesa/swrast/s_stencil.c @@ -1,8 +1,8 @@ /* * Mesa 3-D graphics library - * Version: 6.5 + * Version: 7.1 * - * Copyright (C) 1999-2005 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), @@ -392,6 +392,23 @@ do_stencil_test( GLcontext *ctx, GLuint face, GLuint n, GLstencil stencil[], } +/** + * Compute the zpass/zfail masks by comparing the pre- and post-depth test + * masks. + */ +static INLINE void +compute_pass_fail_masks(GLuint n, const GLubyte origMask[], + const GLubyte newMask[], + GLubyte passMask[], GLubyte failMask[]) +{ + GLuint i; + for (i = 0; i < n; i++) { + ASSERT(newMask[i] == 0 || newMask[i] == 1); + passMask[i] = origMask[i] & newMask[i]; + failMask[i] = origMask[i] & (newMask[i] ^ 1); + } +} + /** * Apply stencil and depth testing to the span of pixels. @@ -460,39 +477,24 @@ stencil_and_ztest_span(GLcontext *ctx, SWspan *span, GLuint face) /* * Perform depth buffering, then apply zpass or zfail stencil function. */ - GLubyte passmask[MAX_WIDTH], failmask[MAX_WIDTH], oldmask[MAX_WIDTH]; - GLuint i; + GLubyte passMask[MAX_WIDTH], failMask[MAX_WIDTH], origMask[MAX_WIDTH]; /* save the current mask bits */ - _mesa_memcpy(oldmask, mask, n * sizeof(GLubyte)); + _mesa_memcpy(origMask, mask, n * sizeof(GLubyte)); /* apply the depth test */ _swrast_depth_test_span(ctx, span); - /* Set the stencil pass/fail flags according to result of depth testing. - * if oldmask[i] == 0 then - * Don't touch the stencil value - * else if oldmask[i] and newmask[i] then - * Depth test passed - * else - * assert(oldmask[i] && !newmask[i]) - * Depth test failed - * endif - */ - for (i=0;i<n;i++) { - ASSERT(mask[i] == 0 || mask[i] == 1); - passmask[i] = oldmask[i] & mask[i]; - failmask[i] = oldmask[i] & (mask[i] ^ 1); - } + compute_pass_fail_masks(n, origMask, mask, passMask, failMask); /* apply the pass and fail operations */ if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) { apply_stencil_op( ctx, ctx->Stencil.ZFailFunc[face], face, - n, stencil, failmask ); + n, stencil, failMask ); } if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) { apply_stencil_op( ctx, ctx->Stencil.ZPassFunc[face], face, - n, stencil, passmask ); + n, stencil, passMask ); } } @@ -902,6 +904,7 @@ stencil_test_pixels( GLcontext *ctx, GLuint face, GLuint n, static GLboolean stencil_and_ztest_pixels( GLcontext *ctx, SWspan *span, GLuint face ) { + GLubyte passMask[MAX_WIDTH], failMask[MAX_WIDTH], origMask[MAX_WIDTH]; struct gl_framebuffer *fb = ctx->DrawBuffer; struct gl_renderbuffer *rb = fb->_StencilBuffer; const GLuint n = span->end; @@ -916,13 +919,10 @@ stencil_and_ztest_pixels( GLcontext *ctx, SWspan *span, GLuint face ) if (!rb->GetPointer(ctx, rb, 0, 0)) { /* No direct access */ GLstencil stencil[MAX_WIDTH]; - GLubyte origMask[MAX_WIDTH]; ASSERT(rb->DataType == GL_UNSIGNED_BYTE); _swrast_get_values(ctx, rb, n, x, y, stencil, sizeof(GLubyte)); - _mesa_memcpy(origMask, mask, n * sizeof(GLubyte)); - (void) do_stencil_test(ctx, face, n, stencil, mask); if (ctx->Depth.Test == GL_FALSE) { @@ -930,27 +930,19 @@ stencil_and_ztest_pixels( GLcontext *ctx, SWspan *span, GLuint face ) n, stencil, mask); } else { + _mesa_memcpy(origMask, mask, n * sizeof(GLubyte)); + _swrast_depth_test_span(ctx, span); + compute_pass_fail_masks(n, origMask, mask, passMask, failMask); + if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) { - GLubyte failmask[MAX_WIDTH]; - GLuint i; - for (i = 0; i < n; i++) { - ASSERT(mask[i] == 0 || mask[i] == 1); - failmask[i] = origMask[i] & (mask[i] ^ 1); - } apply_stencil_op(ctx, ctx->Stencil.ZFailFunc[face], face, - n, stencil, failmask); + n, stencil, failMask); } if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) { - GLubyte passmask[MAX_WIDTH]; - GLuint i; - for (i = 0; i < n; i++) { - ASSERT(mask[i] == 0 || mask[i] == 1); - passmask[i] = origMask[i] & mask[i]; - } apply_stencil_op(ctx, ctx->Stencil.ZPassFunc[face], face, - n, stencil, passmask); + n, stencil, passMask); } } @@ -972,28 +964,21 @@ stencil_and_ztest_pixels( GLcontext *ctx, SWspan *span, GLuint face ) ctx->Stencil.ZPassFunc[face], face, mask); } else { - GLubyte passmask[MAX_WIDTH], failmask[MAX_WIDTH], oldmask[MAX_WIDTH]; - GLuint i; - - _mesa_memcpy(oldmask, mask, n * sizeof(GLubyte)); + _mesa_memcpy(origMask, mask, n * sizeof(GLubyte)); _swrast_depth_test_span(ctx, span); - for (i=0;i<n;i++) { - ASSERT(mask[i] == 0 || mask[i] == 1); - passmask[i] = oldmask[i] & mask[i]; - failmask[i] = oldmask[i] & (mask[i] ^ 1); - } + compute_pass_fail_masks(n, origMask, mask, passMask, failMask); if (ctx->Stencil.ZFailFunc[face] != GL_KEEP) { apply_stencil_op_to_pixels(ctx, n, x, y, ctx->Stencil.ZFailFunc[face], - face, failmask); + face, failMask); } if (ctx->Stencil.ZPassFunc[face] != GL_KEEP) { apply_stencil_op_to_pixels(ctx, n, x, y, ctx->Stencil.ZPassFunc[face], - face, passmask); + face, passMask); } } |