X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fgallium%2Fdrivers%2Fllvmpipe%2Flp_setup_line.c;h=018130c31924a8bdb1be2e59a716b7cce59db133;hb=e26a978773ba8fbff04cd2ab3342fcb02e90c06e;hp=be41c44e6f5d51444aa7a286199137fb4b1e8732;hpb=c7f5c9a3dc6350252e73b541bb85ab3ed9e64a9c;p=mesa.git diff --git a/src/gallium/drivers/llvmpipe/lp_setup_line.c b/src/gallium/drivers/llvmpipe/lp_setup_line.c index be41c44e6f5..018130c3192 100644 --- a/src/gallium/drivers/llvmpipe/lp_setup_line.c +++ b/src/gallium/drivers/llvmpipe/lp_setup_line.c @@ -1,6 +1,6 @@ /************************************************************************** * - * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * Copyright 2007 VMware, Inc. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a @@ -18,7 +18,7 @@ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. - * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR + * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. @@ -29,19 +29,754 @@ * Binning code for lines */ +#include "util/u_math.h" +#include "util/u_memory.h" +#include "lp_perf.h" #include "lp_setup_context.h" +#include "lp_rast.h" +#include "lp_state_fs.h" +#include "lp_state_setup.h" +#include "lp_context.h" +#include "draw/draw_context.h" -static void line_nop( struct lp_setup_context *setup, - const float (*v0)[4], - const float (*v1)[4] ) +#define NUM_CHANNELS 4 + +struct lp_line_info { + + float dx; + float dy; + float oneoverarea; + boolean frontfacing; + + const float (*v1)[4]; + const float (*v2)[4]; + + float (*a0)[4]; + float (*dadx)[4]; + float (*dady)[4]; +}; + + +/** + * Compute a0 for a constant-valued coefficient (GL_FLAT shading). + */ +static void constant_coef( struct lp_setup_context *setup, + struct lp_line_info *info, + unsigned slot, + const float value, + unsigned i ) +{ + info->a0[slot][i] = value; + info->dadx[slot][i] = 0.0f; + info->dady[slot][i] = 0.0f; +} + + +/** + * Compute a0, dadx and dady for a linearly interpolated coefficient, + * for a triangle. + */ +static void linear_coef( struct lp_setup_context *setup, + struct lp_line_info *info, + unsigned slot, + unsigned vert_attr, + unsigned i) +{ + float a1 = info->v1[vert_attr][i]; + float a2 = info->v2[vert_attr][i]; + + float da21 = a1 - a2; + float dadx = da21 * info->dx * info->oneoverarea; + float dady = da21 * info->dy * info->oneoverarea; + + info->dadx[slot][i] = dadx; + info->dady[slot][i] = dady; + + info->a0[slot][i] = (a1 - + (dadx * (info->v1[0][0] - setup->pixel_offset) + + dady * (info->v1[0][1] - setup->pixel_offset))); +} + + +/** + * Compute a0, dadx and dady for a perspective-corrected interpolant, + * for a triangle. + * We basically multiply the vertex value by 1/w before computing + * the plane coefficients (a0, dadx, dady). + * Later, when we compute the value at a particular fragment position we'll + * divide the interpolated value by the interpolated W at that fragment. + */ +static void perspective_coef( struct lp_setup_context *setup, + struct lp_line_info *info, + unsigned slot, + unsigned vert_attr, + unsigned i) +{ + /* premultiply by 1/w (v[0][3] is always 1/w): + */ + float a1 = info->v1[vert_attr][i] * info->v1[0][3]; + float a2 = info->v2[vert_attr][i] * info->v2[0][3]; + + float da21 = a1 - a2; + float dadx = da21 * info->dx * info->oneoverarea; + float dady = da21 * info->dy * info->oneoverarea; + + info->dadx[slot][i] = dadx; + info->dady[slot][i] = dady; + + info->a0[slot][i] = (a1 - + (dadx * (info->v1[0][0] - setup->pixel_offset) + + dady * (info->v1[0][1] - setup->pixel_offset))); +} + +static void +setup_fragcoord_coef( struct lp_setup_context *setup, + struct lp_line_info *info, + unsigned slot, + unsigned usage_mask) +{ + /*X*/ + if (usage_mask & TGSI_WRITEMASK_X) { + info->a0[slot][0] = 0.0; + info->dadx[slot][0] = 1.0; + info->dady[slot][0] = 0.0; + } + + /*Y*/ + if (usage_mask & TGSI_WRITEMASK_Y) { + info->a0[slot][1] = 0.0; + info->dadx[slot][1] = 0.0; + info->dady[slot][1] = 1.0; + } + + /*Z*/ + if (usage_mask & TGSI_WRITEMASK_Z) { + linear_coef(setup, info, slot, 0, 2); + } + + /*W*/ + if (usage_mask & TGSI_WRITEMASK_W) { + linear_coef(setup, info, slot, 0, 3); + } +} + +/** + * Compute the tri->coef[] array dadx, dady, a0 values. + */ +static void setup_line_coefficients( struct lp_setup_context *setup, + struct lp_line_info *info) +{ + const struct lp_setup_variant_key *key = &setup->setup.variant->key; + unsigned fragcoord_usage_mask = TGSI_WRITEMASK_XYZ; + unsigned slot; + + /* setup interpolation for all the remaining attributes: + */ + for (slot = 0; slot < key->num_inputs; slot++) { + unsigned vert_attr = key->inputs[slot].src_index; + unsigned usage_mask = key->inputs[slot].usage_mask; + unsigned i; + + switch (key->inputs[slot].interp) { + case LP_INTERP_CONSTANT: + if (key->flatshade_first) { + for (i = 0; i < NUM_CHANNELS; i++) + if (usage_mask & (1 << i)) + constant_coef(setup, info, slot+1, info->v1[vert_attr][i], i); + } + else { + for (i = 0; i < NUM_CHANNELS; i++) + if (usage_mask & (1 << i)) + constant_coef(setup, info, slot+1, info->v2[vert_attr][i], i); + } + break; + + case LP_INTERP_LINEAR: + for (i = 0; i < NUM_CHANNELS; i++) + if (usage_mask & (1 << i)) + linear_coef(setup, info, slot+1, vert_attr, i); + break; + + case LP_INTERP_PERSPECTIVE: + for (i = 0; i < NUM_CHANNELS; i++) + if (usage_mask & (1 << i)) + perspective_coef(setup, info, slot+1, vert_attr, i); + fragcoord_usage_mask |= TGSI_WRITEMASK_W; + break; + + case LP_INTERP_POSITION: + /* + * The generated pixel interpolators will pick up the coeffs from + * slot 0, so all need to ensure that the usage mask is covers all + * usages. + */ + fragcoord_usage_mask |= usage_mask; + break; + + case LP_INTERP_FACING: + for (i = 0; i < NUM_CHANNELS; i++) + if (usage_mask & (1 << i)) + constant_coef(setup, info, slot+1, + info->frontfacing ? 1.0f : -1.0f, i); + break; + + default: + assert(0); + } + } + + /* The internal position input is in slot zero: + */ + setup_fragcoord_coef(setup, info, 0, + fragcoord_usage_mask); +} + + + +static inline int subpixel_snap( float a ) +{ + return util_iround(FIXED_ONE * a); +} + + +/** + * Print line vertex attribs (for debug). + */ +static void +print_line(struct lp_setup_context *setup, + const float (*v1)[4], + const float (*v2)[4]) +{ + const struct lp_setup_variant_key *key = &setup->setup.variant->key; + uint i; + + debug_printf("llvmpipe line\n"); + for (i = 0; i < 1 + key->num_inputs; i++) { + debug_printf(" v1[%d]: %f %f %f %f\n", i, + v1[i][0], v1[i][1], v1[i][2], v1[i][3]); + } + for (i = 0; i < 1 + key->num_inputs; i++) { + debug_printf(" v2[%d]: %f %f %f %f\n", i, + v2[i][0], v2[i][1], v2[i][2], v2[i][3]); + } +} + + +static inline boolean sign(float x){ + return x >= 0; +} + + +/* Used on positive floats only: + */ +static inline float fracf(float f) +{ + return f - floorf(f); +} + + + +static boolean +try_setup_line( struct lp_setup_context *setup, + const float (*v1)[4], + const float (*v2)[4]) { + struct llvmpipe_context *lp_context = (struct llvmpipe_context *)setup->pipe; + struct lp_scene *scene = setup->scene; + const struct lp_setup_variant_key *key = &setup->setup.variant->key; + struct lp_rast_triangle *line; + struct lp_rast_plane *plane; + struct lp_line_info info; + float width = MAX2(1.0, setup->line_width); + struct u_rect bbox; + unsigned tri_bytes; + int x[4]; + int y[4]; + int i; + int nr_planes = 4; + unsigned viewport_index = 0; + unsigned layer = 0; + + /* linewidth should be interpreted as integer */ + int fixed_width = util_iround(width) * FIXED_ONE; + + float x_offset=0; + float y_offset=0; + float x_offset_end=0; + float y_offset_end=0; + + float x1diff; + float y1diff; + float x2diff; + float y2diff; + float dx, dy; + float area; + const float (*pv)[4]; + + boolean draw_start; + boolean draw_end; + boolean will_draw_start; + boolean will_draw_end; + + if (0) + print_line(setup, v1, v2); + + if (setup->flatshade_first) { + pv = v1; + } + else { + pv = v2; + } + if (setup->viewport_index_slot > 0) { + unsigned *udata = (unsigned*)pv[setup->viewport_index_slot]; + viewport_index = lp_clamp_viewport_idx(*udata); + } + if (setup->layer_slot > 0) { + layer = *(unsigned*)pv[setup->layer_slot]; + layer = MIN2(layer, scene->fb_max_layer); + } + + dx = v1[0][0] - v2[0][0]; + dy = v1[0][1] - v2[0][1]; + area = (dx * dx + dy * dy); + if (area == 0) { + LP_COUNT(nr_culled_tris); + return TRUE; + } + + info.oneoverarea = 1.0f / area; + info.dx = dx; + info.dy = dy; + info.v1 = v1; + info.v2 = v2; + + + /* X-MAJOR LINE */ + if (fabsf(dx) >= fabsf(dy)) { + float dydx = dy / dx; + + x1diff = v1[0][0] - (float) floor(v1[0][0]) - 0.5; + y1diff = v1[0][1] - (float) floor(v1[0][1]) - 0.5; + x2diff = v2[0][0] - (float) floor(v2[0][0]) - 0.5; + y2diff = v2[0][1] - (float) floor(v2[0][1]) - 0.5; + + if (y2diff==-0.5 && dy<0){ + y2diff = 0.5; + } + + /* + * Diamond exit rule test for starting point + */ + if (fabsf(x1diff) + fabsf(y1diff) < 0.5) { + draw_start = TRUE; + } + else if (sign(x1diff) == sign(-dx)) { + draw_start = FALSE; + } + else if (sign(-y1diff) != sign(dy)) { + draw_start = TRUE; + } + else { + /* do intersection test */ + float yintersect = fracf(v1[0][1]) + x1diff * dydx; + draw_start = (yintersect < 1.0 && yintersect > 0.0); + } + + + /* + * Diamond exit rule test for ending point + */ + if (fabsf(x2diff) + fabsf(y2diff) < 0.5) { + draw_end = FALSE; + } + else if (sign(x2diff) != sign(-dx)) { + draw_end = FALSE; + } + else if (sign(-y2diff) == sign(dy)) { + draw_end = TRUE; + } + else { + /* do intersection test */ + float yintersect = fracf(v2[0][1]) + x2diff * dydx; + draw_end = (yintersect < 1.0 && yintersect > 0.0); + } + + /* Are we already drawing start/end? + */ + will_draw_start = sign(-x1diff) != sign(dx); + will_draw_end = (sign(x2diff) == sign(-dx)) || x2diff==0; + + if (dx < 0) { + /* if v2 is to the right of v1, swap pointers */ + const float (*temp)[4] = v1; + v1 = v2; + v2 = temp; + dx = -dx; + dy = -dy; + /* Otherwise shift planes appropriately */ + if (will_draw_start != draw_start) { + x_offset_end = - x1diff - 0.5; + y_offset_end = x_offset_end * dydx; + + } + if (will_draw_end != draw_end) { + x_offset = - x2diff - 0.5; + y_offset = x_offset * dydx; + } + + } + else{ + /* Otherwise shift planes appropriately */ + if (will_draw_start != draw_start) { + x_offset = - x1diff + 0.5; + y_offset = x_offset * dydx; + } + if (will_draw_end != draw_end) { + x_offset_end = - x2diff + 0.5; + y_offset_end = x_offset_end * dydx; + } + } + + /* x/y positions in fixed point */ + x[0] = subpixel_snap(v1[0][0] + x_offset - setup->pixel_offset); + x[1] = subpixel_snap(v2[0][0] + x_offset_end - setup->pixel_offset); + x[2] = subpixel_snap(v2[0][0] + x_offset_end - setup->pixel_offset); + x[3] = subpixel_snap(v1[0][0] + x_offset - setup->pixel_offset); + + y[0] = subpixel_snap(v1[0][1] + y_offset - setup->pixel_offset) - fixed_width/2; + y[1] = subpixel_snap(v2[0][1] + y_offset_end - setup->pixel_offset) - fixed_width/2; + y[2] = subpixel_snap(v2[0][1] + y_offset_end - setup->pixel_offset) + fixed_width/2; + y[3] = subpixel_snap(v1[0][1] + y_offset - setup->pixel_offset) + fixed_width/2; + + } + else { + const float dxdy = dx / dy; + + /* Y-MAJOR LINE */ + x1diff = v1[0][0] - (float) floor(v1[0][0]) - 0.5; + y1diff = v1[0][1] - (float) floor(v1[0][1]) - 0.5; + x2diff = v2[0][0] - (float) floor(v2[0][0]) - 0.5; + y2diff = v2[0][1] - (float) floor(v2[0][1]) - 0.5; + + if (x2diff==-0.5 && dx<0) { + x2diff = 0.5; + } + + /* + * Diamond exit rule test for starting point + */ + if (fabsf(x1diff) + fabsf(y1diff) < 0.5) { + draw_start = TRUE; + } + else if (sign(-y1diff) == sign(dy)) { + draw_start = FALSE; + } + else if (sign(x1diff) != sign(-dx)) { + draw_start = TRUE; + } + else { + /* do intersection test */ + float xintersect = fracf(v1[0][0]) + y1diff * dxdy; + draw_start = (xintersect < 1.0 && xintersect > 0.0); + } + + /* + * Diamond exit rule test for ending point + */ + if (fabsf(x2diff) + fabsf(y2diff) < 0.5) { + draw_end = FALSE; + } + else if (sign(-y2diff) != sign(dy) ) { + draw_end = FALSE; + } + else if (sign(x2diff) == sign(-dx) ) { + draw_end = TRUE; + } + else { + /* do intersection test */ + float xintersect = fracf(v2[0][0]) + y2diff * dxdy; + draw_end = (xintersect < 1.0 && xintersect >= 0.0); + } + + /* Are we already drawing start/end? + */ + will_draw_start = sign(y1diff) == sign(dy); + will_draw_end = (sign(-y2diff) == sign(dy)) || y2diff==0; + + if (dy > 0) { + /* if v2 is on top of v1, swap pointers */ + const float (*temp)[4] = v1; + v1 = v2; + v2 = temp; + dx = -dx; + dy = -dy; + + /* Otherwise shift planes appropriately */ + if (will_draw_start != draw_start) { + y_offset_end = - y1diff + 0.5; + x_offset_end = y_offset_end * dxdy; + } + if (will_draw_end != draw_end) { + y_offset = - y2diff + 0.5; + x_offset = y_offset * dxdy; + } + } + else { + /* Otherwise shift planes appropriately */ + if (will_draw_start != draw_start) { + y_offset = - y1diff - 0.5; + x_offset = y_offset * dxdy; + + } + if (will_draw_end != draw_end) { + y_offset_end = - y2diff - 0.5; + x_offset_end = y_offset_end * dxdy; + } + } + + /* x/y positions in fixed point */ + x[0] = subpixel_snap(v1[0][0] + x_offset - setup->pixel_offset) - fixed_width/2; + x[1] = subpixel_snap(v2[0][0] + x_offset_end - setup->pixel_offset) - fixed_width/2; + x[2] = subpixel_snap(v2[0][0] + x_offset_end - setup->pixel_offset) + fixed_width/2; + x[3] = subpixel_snap(v1[0][0] + x_offset - setup->pixel_offset) + fixed_width/2; + + y[0] = subpixel_snap(v1[0][1] + y_offset - setup->pixel_offset); + y[1] = subpixel_snap(v2[0][1] + y_offset_end - setup->pixel_offset); + y[2] = subpixel_snap(v2[0][1] + y_offset_end - setup->pixel_offset); + y[3] = subpixel_snap(v1[0][1] + y_offset - setup->pixel_offset); + } + + /* Bounding rectangle (in pixels) */ + { + /* Yes this is necessary to accurately calculate bounding boxes + * with the two fill-conventions we support. GL (normally) ends + * up needing a bottom-left fill convention, which requires + * slightly different rounding. + */ + int adj = (setup->bottom_edge_rule != 0) ? 1 : 0; + + bbox.x0 = (MIN4(x[0], x[1], x[2], x[3]) + (FIXED_ONE-1)) >> FIXED_ORDER; + bbox.x1 = (MAX4(x[0], x[1], x[2], x[3]) + (FIXED_ONE-1)) >> FIXED_ORDER; + bbox.y0 = (MIN4(y[0], y[1], y[2], y[3]) + (FIXED_ONE-1) + adj) >> FIXED_ORDER; + bbox.y1 = (MAX4(y[0], y[1], y[2], y[3]) + (FIXED_ONE-1) + adj) >> FIXED_ORDER; + + /* Inclusive coordinates: + */ + bbox.x1--; + bbox.y1--; + } + + if (bbox.x1 < bbox.x0 || + bbox.y1 < bbox.y0) { + if (0) debug_printf("empty bounding box\n"); + LP_COUNT(nr_culled_tris); + return TRUE; + } + + if (!u_rect_test_intersection(&setup->draw_regions[viewport_index], &bbox)) { + if (0) debug_printf("offscreen\n"); + LP_COUNT(nr_culled_tris); + return TRUE; + } + + /* Can safely discard negative regions: + */ + bbox.x0 = MAX2(bbox.x0, 0); + bbox.y0 = MAX2(bbox.y0, 0); + + nr_planes = 4; + /* + * Determine how many scissor planes we need, that is drop scissor + * edges if the bounding box of the tri is fully inside that edge. + */ + if (setup->scissor_test) { + /* why not just use draw_regions */ + boolean s_planes[4]; + scissor_planes_needed(s_planes, &bbox, &setup->scissors[viewport_index]); + nr_planes += s_planes[0] + s_planes[1] + s_planes[2] + s_planes[3]; + } + + line = lp_setup_alloc_triangle(scene, + key->num_inputs, + nr_planes, + &tri_bytes); + if (!line) + return FALSE; + +#ifdef DEBUG + line->v[0][0] = v1[0][0]; + line->v[1][0] = v2[0][0]; + line->v[0][1] = v1[0][1]; + line->v[1][1] = v2[0][1]; +#endif + + LP_COUNT(nr_tris); + + if (lp_context->active_statistics_queries && + !llvmpipe_rasterization_disabled(lp_context)) { + lp_context->pipeline_statistics.c_primitives++; + } + + /* calculate the deltas */ + plane = GET_PLANES(line); + plane[0].dcdy = x[0] - x[1]; + plane[1].dcdy = x[1] - x[2]; + plane[2].dcdy = x[2] - x[3]; + plane[3].dcdy = x[3] - x[0]; + + plane[0].dcdx = y[0] - y[1]; + plane[1].dcdx = y[1] - y[2]; + plane[2].dcdx = y[2] - y[3]; + plane[3].dcdx = y[3] - y[0]; + + if (draw_will_inject_frontface(lp_context->draw) && + setup->face_slot > 0) { + line->inputs.frontfacing = v1[setup->face_slot][0]; + } else { + line->inputs.frontfacing = TRUE; + } + + /* Setup parameter interpolants: + */ + info.a0 = GET_A0(&line->inputs); + info.dadx = GET_DADX(&line->inputs); + info.dady = GET_DADY(&line->inputs); + info.frontfacing = line->inputs.frontfacing; + setup_line_coefficients(setup, &info); + + line->inputs.disable = FALSE; + line->inputs.opaque = FALSE; + line->inputs.layer = layer; + line->inputs.viewport_index = viewport_index; + + /* + * XXX: this code is mostly identical to the one in lp_setup_tri, except it + * uses 4 planes instead of 3. Could share the code (including the sse + * assembly, in fact we'd get the 4th plane for free). + * The only difference apart from storing the 4th plane would be some + * different shuffle for calculating dcdx/dcdy. + */ + for (i = 0; i < 4; i++) { + + /* half-edge constants, will be iterated over the whole render + * target. + */ + plane[i].c = IMUL64(plane[i].dcdx, x[i]) - IMUL64(plane[i].dcdy, y[i]); + + /* correct for top-left vs. bottom-left fill convention. + */ + if (plane[i].dcdx < 0) { + /* both fill conventions want this - adjust for left edges */ + plane[i].c++; + } + else if (plane[i].dcdx == 0) { + if (setup->pixel_offset == 0) { + /* correct for top-left fill convention: + */ + if (plane[i].dcdy > 0) plane[i].c++; + } + else { + /* correct for bottom-left fill convention: + */ + if (plane[i].dcdy < 0) plane[i].c++; + } + } + + plane[i].dcdx *= FIXED_ONE; + plane[i].dcdy *= FIXED_ONE; + + /* find trivial reject offsets for each edge for a single-pixel + * sized block. These will be scaled up at each recursive level to + * match the active blocksize. Scaling in this way works best if + * the blocks are square. + */ + plane[i].eo = 0; + if (plane[i].dcdx < 0) plane[i].eo -= plane[i].dcdx; + if (plane[i].dcdy > 0) plane[i].eo += plane[i].dcdy; + } + + + /* + * When rasterizing scissored tris, use the intersection of the + * triangle bounding box and the scissor rect to generate the + * scissor planes. + * + * This permits us to cut off the triangle "tails" that are present + * in the intermediate recursive levels caused when two of the + * triangles edges don't diverge quickly enough to trivially reject + * exterior blocks from the triangle. + * + * It's not really clear if it's worth worrying about these tails, + * but since we generate the planes for each scissored tri, it's + * free to trim them in this case. + * + * Note that otherwise, the scissor planes only vary in 'C' value, + * and even then only on state-changes. Could alternatively store + * these planes elsewhere. + * (Or only store the c value together with a bit indicating which + * scissor edge this is, so rasterization would treat them differently + * (easier to evaluate) to ordinary planes.) + */ + if (nr_planes > 4) { + /* why not just use draw_regions */ + const struct u_rect *scissor = &setup->scissors[viewport_index]; + struct lp_rast_plane *plane_s = &plane[4]; + boolean s_planes[4]; + scissor_planes_needed(s_planes, &bbox, scissor); + + if (s_planes[0]) { + plane_s->dcdx = -1 << 8; + plane_s->dcdy = 0; + plane_s->c = (1-scissor->x0) << 8; + plane_s->eo = 1 << 8; + plane_s++; + } + if (s_planes[1]) { + plane_s->dcdx = 1 << 8; + plane_s->dcdy = 0; + plane_s->c = (scissor->x1+1) << 8; + plane_s->eo = 0 << 8; + plane_s++; + } + if (s_planes[2]) { + plane_s->dcdx = 0; + plane_s->dcdy = 1 << 8; + plane_s->c = (1-scissor->y0) << 8; + plane_s->eo = 1 << 8; + plane_s++; + } + if (s_planes[3]) { + plane_s->dcdx = 0; + plane_s->dcdy = -1 << 8; + plane_s->c = (scissor->y1+1) << 8; + plane_s->eo = 0; + plane_s++; + } + assert(plane_s == &plane[nr_planes]); + } + + return lp_setup_bin_triangle(setup, line, &bbox, nr_planes, viewport_index); } -void -lp_setup_choose_line( struct lp_setup_context *setup ) +static void lp_setup_line( struct lp_setup_context *setup, + const float (*v0)[4], + const float (*v1)[4] ) { - setup->line = line_nop; + if (!try_setup_line( setup, v0, v1 )) + { + if (!lp_setup_flush_and_restart(setup)) + return; + + if (!try_setup_line( setup, v0, v1 )) + return; + } +} + + +void lp_setup_choose_line( struct lp_setup_context *setup ) +{ + setup->line = lp_setup_line; }