diff options
Diffstat (limited to 'src/mesa/swrast/s_depth.c')
| -rw-r--r-- | src/mesa/swrast/s_depth.c | 49 |
1 files changed, 46 insertions, 3 deletions
diff --git a/src/mesa/swrast/s_depth.c b/src/mesa/swrast/s_depth.c index 5001081ae0..b892ffabb3 100644 --- a/src/mesa/swrast/s_depth.c +++ b/src/mesa/swrast/s_depth.c @@ -1,4 +1,4 @@ -/* $Id: s_depth.c,v 1.9 2001/03/19 02:25:36 keithw Exp $ */ +/* $Id: s_depth.c,v 1.10 2001/12/17 04:54:35 brianp Exp $ */ /* * Mesa 3-D graphics library @@ -535,8 +535,8 @@ depth_test_span32( GLcontext *ctx, GLuint n, GLint x, GLint y, * Apply depth test to span of fragments. Hardware or software z buffer. */ GLuint -_mesa_depth_test_span( GLcontext *ctx, GLuint n, GLint x, GLint y, - const GLdepth z[], GLubyte mask[] ) +_old_depth_test_span( GLcontext *ctx, GLuint n, GLint x, GLint y, + const GLdepth z[], GLubyte mask[] ) { SWcontext *swrast = SWRAST_CONTEXT(ctx); if (swrast->Driver.ReadDepthSpan) { @@ -564,6 +564,49 @@ _mesa_depth_test_span( GLcontext *ctx, GLuint n, GLint x, GLint y, } } +/* + * Apply depth test to span of fragments. Hardware or software z buffer. + */ +GLuint +_mesa_depth_test_span( GLcontext *ctx, struct sw_span *span) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + ASSERT(span->activeMask & SPAN_Z); + ASSERT(span->filledMask == GL_TRUE); + ASSERT(span->filledDepth == GL_TRUE); + SW_SPAN_SET_FLAG(span->testedDepth); + + if (swrast->Driver.ReadDepthSpan) { + /* hardware-based depth buffer */ + GLdepth zbuffer[MAX_WIDTH]; + GLuint passed; + (*swrast->Driver.ReadDepthSpan)(ctx, span->end, span->x, span->y, zbuffer); + passed = depth_test_span32(ctx, span->end, span->x, span->y, + zbuffer, span->depth, span->mask); + ASSERT(swrast->Driver.WriteDepthSpan); + (*swrast->Driver.WriteDepthSpan)(ctx, span->end, span->x, span->y, zbuffer, span->mask); + if (passed < span->end) + span->write_all = GL_FALSE; + return passed; + } + else { + GLuint passed; + /* software depth buffer */ + if (ctx->Visual.depthBits <= 16) { + GLushort *zptr = (GLushort *) Z_ADDRESS16(ctx, span->x, span->y); + passed = depth_test_span16(ctx, span->end, span->x, span->y, zptr, span->depth, span->mask); + } + else { + GLuint *zptr = (GLuint *) Z_ADDRESS32(ctx, span->x, span->y); + passed = depth_test_span32(ctx, span->end, span->x, span->y, zptr, span->depth, span->mask); + } + if (passed < span->end) + span->write_all = GL_FALSE; + return passed; + } +} + |