diff options
Diffstat (limited to 'src/mesa/pipe/softpipe/sp_prim_setup.c')
-rw-r--r-- | src/mesa/pipe/softpipe/sp_prim_setup.c | 131 |
1 files changed, 72 insertions, 59 deletions
diff --git a/src/mesa/pipe/softpipe/sp_prim_setup.c b/src/mesa/pipe/softpipe/sp_prim_setup.c index a1addc4ee1..8ef0fcbf9c 100644 --- a/src/mesa/pipe/softpipe/sp_prim_setup.c +++ b/src/mesa/pipe/softpipe/sp_prim_setup.c @@ -769,17 +769,12 @@ static void setup_point(struct prim_stage *stage, struct prim_header *prim) { struct setup_stage *setup = setup_stage( stage ); - GLfloat halfSize = 7.3; /*XXX this is a vertex attrib */ - GLfloat halfSizeSquared = halfSize * halfSize; + /*XXX this should be a vertex attrib! */ + GLfloat halfSize = 0.5 * setup->stage.softpipe->point.size; + GLboolean round = setup->stage.softpipe->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]; - const GLint ixmin = block((GLint) (x - halfSize)); - const GLint ixmax = block((GLint) (x + halfSize)); - const GLint iymin = block((GLint) (y - halfSize)); - const GLint iymax = block((GLint) (y + halfSize)); - GLboolean round = GL_TRUE; - GLint ix, iy; GLuint slot, j; /* For points, all interpolants are constant-valued. @@ -808,57 +803,75 @@ setup_point(struct prim_stage *stage, struct prim_header *prim) /* XXX need to clip against scissor bounds too */ - for (iy = iymin; iy <= iymax; iy += 2) { - for (ix = ixmin; ix <= ixmax; ix += 2) { - - if (round) { - /* rounded points */ - /* XXX for GL_SMOOTH, need to compute per-fragment coverage too */ - GLfloat dx, dy; - - setup->quad.mask = 0x0; - - dx = (ix + 0.5) - x; - dy = (iy + 0.5) - y; - if (dx * dx + dy * dy <= halfSizeSquared) - setup->quad.mask |= MASK_BOTTOM_LEFT; - - dx = (ix + 1.5) - x; - dy = (iy + 0.5) - y; - if (dx * dx + dy * dy <= halfSizeSquared) - setup->quad.mask |= MASK_BOTTOM_RIGHT; - - dx = (ix + 0.5) - x; - dy = (iy + 1.5) - y; - if (dx * dx + dy * dy <= halfSizeSquared) - setup->quad.mask |= MASK_TOP_LEFT; - - dx = (ix + 1.5) - x; - dy = (iy + 1.5) - y; - if (dx * dx + dy * dy <= halfSizeSquared) - setup->quad.mask |= MASK_TOP_RIGHT; - } - else { - /* square points */ - setup->quad.mask = 0xf; - - if (ix + 0.5 < x - halfSize) - setup->quad.mask &= (MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT); - - if (ix + 1.5 > x + halfSize) - setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_TOP_LEFT); - - if (iy + 0.5 < y - halfSize) - setup->quad.mask &= (MASK_TOP_LEFT | MASK_TOP_RIGHT); - - if (iy + 1.5 > y + halfSize) - setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT); - } - - if (setup->quad.mask) { - setup->quad.x0 = ix; - setup->quad.y0 = iy; - quad_shade( setup->stage.softpipe, &setup->quad ); + if (halfSize <= 0.5 && !round) { + /* special case for 1-pixel points */ + const GLint ix = ((GLint) x) & 1; + const GLint iy = ((GLint) y) & 1; + setup->quad.x0 = x - ix; + setup->quad.y0 = y - iy; + setup->quad.mask = (1 << ix) << (2 * iy); + quad_shade(setup->stage.softpipe, &setup->quad); + } + else { + const GLint ixmin = block((GLint) (x - halfSize)); + const GLint ixmax = block((GLint) (x + halfSize)); + const GLint iymin = block((GLint) (y - halfSize)); + const GLint iymax = block((GLint) (y + halfSize)); + GLfloat halfSizeSquared = halfSize * halfSize; + GLint ix, iy; + + for (iy = iymin; iy <= iymax; iy += 2) { + for (ix = ixmin; ix <= ixmax; ix += 2) { + + if (round) { + /* rounded points */ + /* XXX for GL_SMOOTH, need to compute per-fragment coverage too */ + GLfloat dx, dy; + + setup->quad.mask = 0x0; + + dx = (ix + 0.5) - x; + dy = (iy + 0.5) - y; + if (dx * dx + dy * dy <= halfSizeSquared) + setup->quad.mask |= MASK_BOTTOM_LEFT; + + dx = (ix + 1.5) - x; + dy = (iy + 0.5) - y; + if (dx * dx + dy * dy <= halfSizeSquared) + setup->quad.mask |= MASK_BOTTOM_RIGHT; + + dx = (ix + 0.5) - x; + dy = (iy + 1.5) - y; + if (dx * dx + dy * dy <= halfSizeSquared) + setup->quad.mask |= MASK_TOP_LEFT; + + dx = (ix + 1.5) - x; + dy = (iy + 1.5) - y; + if (dx * dx + dy * dy <= halfSizeSquared) + setup->quad.mask |= MASK_TOP_RIGHT; + } + else { + /* square points */ + setup->quad.mask = 0xf; + + if (ix + 0.5 < x - halfSize) + setup->quad.mask &= (MASK_BOTTOM_RIGHT | MASK_TOP_RIGHT); + + if (ix + 1.5 > x + halfSize) + setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_TOP_LEFT); + + if (iy + 0.5 < y - halfSize) + setup->quad.mask &= (MASK_TOP_LEFT | MASK_TOP_RIGHT); + + if (iy + 1.5 > y + halfSize) + setup->quad.mask &= (MASK_BOTTOM_LEFT | MASK_BOTTOM_RIGHT); + } + + if (setup->quad.mask) { + setup->quad.x0 = ix; + setup->quad.y0 = iy; + quad_shade( setup->stage.softpipe, &setup->quad ); + } } } } |