diff options
Diffstat (limited to 'src/gallium/drivers/svga/svga_pipe_rasterizer.c')
| -rw-r--r-- | src/gallium/drivers/svga/svga_pipe_rasterizer.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_pipe_rasterizer.c b/src/gallium/drivers/svga/svga_pipe_rasterizer.c new file mode 100644 index 0000000000..b03f8eb9cf --- /dev/null +++ b/src/gallium/drivers/svga/svga_pipe_rasterizer.c @@ -0,0 +1,250 @@ +/********************************************************** + * Copyright 2008-2009 VMware, Inc. 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"), to deal in the Software without + * restriction, including without limitation the rights to use, copy, + * modify, merge, publish, distribute, sublicense, and/or sell copies + * of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * 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 + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * 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. + * + **********************************************************/ + +#include "draw/draw_context.h" +#include "pipe/p_inlines.h" +#include "pipe/p_defines.h" +#include "util/u_math.h" +#include "util/u_memory.h" + +#include "svga_context.h" +#include "svga_state.h" + +#include "svga_hw_reg.h" + +/* Hardware frontwinding is always set up as SVGA3D_FRONTWINDING_CW. + */ +static SVGA3dFace svga_translate_cullmode( unsigned mode, + unsigned front_winding ) +{ + switch (mode) { + case PIPE_WINDING_NONE: + return SVGA3D_FACE_NONE; + case PIPE_WINDING_CCW: + return SVGA3D_FACE_BACK; + case PIPE_WINDING_CW: + return SVGA3D_FACE_FRONT; + case PIPE_WINDING_BOTH: + return SVGA3D_FACE_FRONT_BACK; + default: + assert(0); + return SVGA3D_FACE_NONE; + } +} + +static SVGA3dShadeMode svga_translate_flatshade( unsigned mode ) +{ + return mode ? SVGA3D_SHADEMODE_FLAT : SVGA3D_SHADEMODE_SMOOTH; +} + + +static void * +svga_create_rasterizer_state(struct pipe_context *pipe, + const struct pipe_rasterizer_state *templ) +{ + struct svga_rasterizer_state *rast = CALLOC_STRUCT( svga_rasterizer_state ); + /* need this for draw module. */ + rast->templ = *templ; + + /* light_twoside - XXX: need fragment shader varient */ + /* poly_smooth - XXX: no fallback available */ + /* poly_stipple_enable - draw module */ + /* point_sprite - ? */ + /* point_size_per_vertex - ? */ + /* sprite_coord_mode - ??? */ + /* bypass_vs_viewport_and_clip - handled by viewport setup */ + /* flatshade_first - handled by index translation */ + /* gl_rasterization_rules - XXX - viewport code */ + /* line_width - draw module */ + /* fill_cw, fill_ccw - draw module or index translation */ + + rast->shademode = svga_translate_flatshade( templ->flatshade ); + rast->cullmode = svga_translate_cullmode( templ->cull_mode, + templ->front_winding ); + rast->scissortestenable = templ->scissor; + rast->multisampleantialias = templ->multisample; + rast->antialiasedlineenable = templ->line_smooth; + rast->lastpixel = templ->line_last_pixel; + rast->pointsize = templ->point_size; + rast->pointsize_min = templ->point_size_min; + rast->pointsize_max = templ->point_size_max; + rast->hw_unfilled = PIPE_POLYGON_MODE_FILL; + + /* Use swtnl + decomposition implement these: + */ + if (templ->poly_stipple_enable) + rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS; + + if (templ->line_width != 1.0 && + templ->line_width != 0.0) + rast->need_pipeline |= SVGA_PIPELINE_FLAG_LINES; + + if (templ->line_stipple_enable) { + /* LinePattern not implemented on all backends. + */ + if (0) { + SVGA3dLinePattern lp; + lp.repeat = templ->line_stipple_factor + 1; + lp.pattern = templ->line_stipple_pattern; + rast->linepattern = lp.uintValue; + } + else { + rast->need_pipeline |= SVGA_PIPELINE_FLAG_LINES; + } + } + + if (templ->point_smooth) + rast->need_pipeline |= SVGA_PIPELINE_FLAG_POINTS; + + { + boolean offset_cw = templ->offset_cw; + boolean offset_ccw = templ->offset_ccw; + boolean offset = 0; + int fill_cw = templ->fill_cw; + int fill_ccw = templ->fill_ccw; + int fill = PIPE_POLYGON_MODE_FILL; + + switch (templ->cull_mode) { + case PIPE_WINDING_BOTH: + offset = 0; + fill = PIPE_POLYGON_MODE_FILL; + break; + + case PIPE_WINDING_CW: + offset = offset_ccw; + fill = fill_ccw; + break; + + case PIPE_WINDING_CCW: + offset = offset_cw; + fill = fill_cw; + break; + + case PIPE_WINDING_NONE: + if (fill_cw != fill_ccw || offset_cw != offset_ccw) + { + /* Always need the draw module to work out different + * front/back fill modes: + */ + rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS; + } + else { + offset = offset_ccw; + fill = fill_ccw; + } + break; + + default: + assert(0); + break; + } + + /* Unfilled primitive modes aren't implemented on all virtual + * hardware. We can do some unfilled processing with index + * translation, but otherwise need the draw module: + */ + if (fill != PIPE_POLYGON_MODE_FILL && + (templ->flatshade || + templ->light_twoside || + offset || + templ->cull_mode != PIPE_WINDING_NONE)) + { + fill = PIPE_POLYGON_MODE_FILL; + rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS; + } + + /* If we are decomposing to lines, and lines need the pipeline, + * then we also need the pipeline for tris. + */ + if (fill == PIPE_POLYGON_MODE_LINE && + (rast->need_pipeline & SVGA_PIPELINE_FLAG_LINES)) + { + fill = PIPE_POLYGON_MODE_FILL; + rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS; + } + + /* Similarly for points: + */ + if (fill == PIPE_POLYGON_MODE_POINT && + (rast->need_pipeline & SVGA_PIPELINE_FLAG_POINTS)) + { + fill = PIPE_POLYGON_MODE_FILL; + rast->need_pipeline |= SVGA_PIPELINE_FLAG_TRIS; + } + + if (offset) { + rast->slopescaledepthbias = templ->offset_scale; + rast->depthbias = templ->offset_units; + } + + rast->hw_unfilled = fill; + } + + + + + if (rast->need_pipeline & SVGA_PIPELINE_FLAG_TRIS) { + /* Turn off stuff which will get done in the draw module: + */ + rast->hw_unfilled = PIPE_POLYGON_MODE_FILL; + rast->slopescaledepthbias = 0; + rast->depthbias = 0; + } + + return rast; +} + +static void svga_bind_rasterizer_state( struct pipe_context *pipe, + void *state ) +{ + struct svga_context *svga = svga_context(pipe); + struct svga_rasterizer_state *raster = (struct svga_rasterizer_state *)state; + + svga->curr.rast = raster; + + draw_set_rasterizer_state(svga->swtnl.draw, raster ? &raster->templ : NULL); + + svga->dirty |= SVGA_NEW_RAST; +} + +static void svga_delete_rasterizer_state(struct pipe_context *pipe, + void *raster) +{ + FREE(raster); +} + + +void svga_init_rasterizer_functions( struct svga_context *svga ) +{ + svga->pipe.create_rasterizer_state = svga_create_rasterizer_state; + svga->pipe.bind_rasterizer_state = svga_bind_rasterizer_state; + svga->pipe.delete_rasterizer_state = svga_delete_rasterizer_state; +} + + +/*********************************************************************** + * Hardware state update + */ + |