From 05ba76757b7349f0c3de2d9ce42c543fa7e931c2 Mon Sep 17 00:00:00 2001 From: Brian Date: Fri, 27 Jul 2007 10:50:35 -0600 Subject: Clip triangles against softpipe->cliprect which includes scissor and surface bounds. This prevents rendering out of bounds when the viewport is partially outside the surface bounds. --- src/mesa/pipe/softpipe/sp_prim_setup.c | 72 ++++++++++++++----------------- src/mesa/pipe/softpipe/sp_state_derived.c | 8 ++-- 2 files changed, 36 insertions(+), 44 deletions(-) (limited to 'src/mesa') diff --git a/src/mesa/pipe/softpipe/sp_prim_setup.c b/src/mesa/pipe/softpipe/sp_prim_setup.c index 63568404dc..d07bd5381d 100644 --- a/src/mesa/pipe/softpipe/sp_prim_setup.c +++ b/src/mesa/pipe/softpipe/sp_prim_setup.c @@ -110,28 +110,31 @@ static inline struct setup_stage *setup_stage( struct draw_stage *stage ) static INLINE void quad_clip(struct setup_stage *setup) { - const struct softpipe_context *sp = setup->softpipe; - if (setup->quad.x0 >= sp->cliprect.maxx || - setup->quad.y0 >= sp->cliprect.maxy || - setup->quad.x0 + 1 < sp->cliprect.minx || - setup->quad.y0 + 1 < sp->cliprect.miny) { + const struct pipe_scissor_state *cliprect = &setup->softpipe->cliprect; + if (setup->quad.x0 >= cliprect->maxx || + setup->quad.y0 >= cliprect->maxy || + setup->quad.x0 + 1 < cliprect->minx || + setup->quad.y0 + 1 < cliprect->miny) { /* totally clipped */ setup->quad.mask = 0x0; return; } - if (setup->quad.x0 < sp->cliprect.minx) + if (setup->quad.x0 < cliprect->minx) setup->quad.mask &= (MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT); - if (setup->quad.y0 < sp->cliprect.miny) + if (setup->quad.y0 < cliprect->miny) setup->quad.mask &= (MASK_TOP_LEFT | MASK_TOP_RIGHT); - if (setup->quad.x0 == sp->cliprect.maxx - 1) + if (setup->quad.x0 == cliprect->maxx - 1) setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_TOP_LEFT); - if (setup->quad.y0 == sp->cliprect.maxy - 1) + if (setup->quad.y0 == cliprect->maxy - 1) setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT); } /** * Emit/render a quad. + * Called during point/line rendering. For triangles, we call + * run_shader_block() which doesn't do clipping (since clipping is + * done at a higher level for tris). * This passes the quad to the first stage of per-fragment operations. */ static INLINE void @@ -162,11 +165,11 @@ static inline GLint block( GLint x ) static void run_shader_block( struct setup_stage *setup, GLint x, GLint y, GLuint mask ) { + struct softpipe_context *sp = setup->softpipe; setup->quad.x0 = x; setup->quad.y0 = y; setup->quad.mask = mask; - - quad_emit(setup); + sp->quad.first->run(sp->quad.first, &setup->quad); } @@ -501,38 +504,31 @@ static void setup_tri_edges( struct setup_stage *setup ) /** * Render the upper or lower half of a triangle. - * Scissoring is applied here too. + * Scissoring/cliprect is applied here too. */ static void subtriangle( struct setup_stage *setup, struct edge *eleft, struct edge *eright, GLuint lines ) { + const struct pipe_scissor_state *cliprect = &setup->softpipe->cliprect; GLint y, start_y, finish_y; GLint sy = (GLint)eleft->sy; assert((GLint)eleft->sy == (GLint) eright->sy); - assert((GLint)eleft->sy >= 0); /* catch bug in x64? */ - /* scissor y: - */ - if (setup->softpipe->setup.scissor) { - start_y = sy; - finish_y = start_y + lines; + /* clip top/bottom */ + start_y = sy; + finish_y = sy + lines; - if (start_y < setup->softpipe->scissor.miny) - start_y = setup->softpipe->scissor.miny; + if (start_y < cliprect->miny) + start_y = cliprect->miny; - if (finish_y > setup->softpipe->scissor.maxy) - finish_y = setup->softpipe->scissor.maxy; + if (finish_y > cliprect->maxy) + finish_y = cliprect->maxy; - start_y -= sy; - finish_y -= sy; - } - else { - start_y = 0; - finish_y = lines; - } + start_y -= sy; + finish_y -= sy; /* _mesa_printf("%s %d %d\n", __FUNCTION__, start_y, finish_y); @@ -549,15 +545,11 @@ static void subtriangle( struct setup_stage *setup, GLint left = (GLint)(eleft->sx + y * eleft->dxdy); GLint right = (GLint)(eright->sx + y * eright->dxdy); - /* scissor x: - */ - if (setup->softpipe->setup.scissor) { - if (left < setup->softpipe->scissor.minx) - left = setup->softpipe->scissor.minx; - - if (right > setup->softpipe->scissor.maxx) - right = setup->softpipe->scissor.maxx; - } + /* clip left/right */ + if (left < cliprect->minx) + left = cliprect->minx; + if (right > cliprect->maxx) + right = cliprect->maxx; if (left < right) { GLint _y = sy+y; @@ -875,8 +867,8 @@ setup_point(struct draw_stage *stage, struct prim_header *prim) { struct setup_stage *setup = setup_stage( stage ); /*XXX this should be a vertex attrib! */ - GLfloat halfSize = 0.5 * setup->softpipe->setup.point_size; - GLboolean round = setup->softpipe->setup.point_smooth; + const GLfloat halfSize = 0.5 * setup->softpipe->setup.point_size; + const GLboolean round = setup->softpipe->setup.point_smooth; const struct vertex_header *v0 = prim->v[0]; const GLfloat x = v0->data[FRAG_ATTRIB_WPOS][0]; const GLfloat y = v0->data[FRAG_ATTRIB_WPOS][1]; diff --git a/src/mesa/pipe/softpipe/sp_state_derived.c b/src/mesa/pipe/softpipe/sp_state_derived.c index 9572890afe..e1faaed93c 100644 --- a/src/mesa/pipe/softpipe/sp_state_derived.c +++ b/src/mesa/pipe/softpipe/sp_state_derived.c @@ -185,15 +185,15 @@ compute_cliprect(struct softpipe_context *sp) /* clip to scissor rect */ sp->cliprect.minx = MAX2(sp->scissor.minx, 0); sp->cliprect.miny = MAX2(sp->scissor.miny, 0); - sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth - 1); - sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight - 1); + sp->cliprect.maxx = MIN2(sp->scissor.maxx, surfWidth); + sp->cliprect.maxy = MIN2(sp->scissor.maxy, surfHeight); } else { /* clip to surface bounds */ sp->cliprect.minx = 0; sp->cliprect.miny = 0; - sp->cliprect.maxx = surfWidth - 1; - sp->cliprect.maxy = surfHeight - 1; + sp->cliprect.maxx = surfWidth; + sp->cliprect.maxy = surfHeight; } } -- cgit v1.2.3