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Diffstat (limited to 'src/mesa/pipe/draw/draw_context.c')
| -rw-r--r-- | src/mesa/pipe/draw/draw_context.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/mesa/pipe/draw/draw_context.c b/src/mesa/pipe/draw/draw_context.c new file mode 100644 index 0000000000..a97f488387 --- /dev/null +++ b/src/mesa/pipe/draw/draw_context.c @@ -0,0 +1,183 @@ +/************************************************************************** + * + * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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, sub license, 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 (including the + * next paragraph) 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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. + * + **************************************************************************/ + + /* + * Authors: + * Keith Whitwell <keith@tungstengraphics.com> + */ + +#include "imports.h" +#include "macros.h" + +#include "draw_context.h" +#include "draw_private.h" + + +struct draw_context *draw_create( void ) +{ + struct draw_context *draw = CALLOC_STRUCT( draw_context ); + + /* create pipeline stages */ + draw->pipeline.unfilled = draw_unfilled_stage( draw ); + draw->pipeline.twoside = draw_twoside_stage( draw ); + draw->pipeline.offset = draw_offset_stage( draw ); + draw->pipeline.clip = draw_clip_stage( draw ); + draw->pipeline.flatshade = draw_flatshade_stage( draw ); + draw->pipeline.cull = draw_cull_stage( draw ); + + ASSIGN_4V( draw->plane[0], -1, 0, 0, 1 ); + ASSIGN_4V( draw->plane[1], 1, 0, 0, 1 ); + ASSIGN_4V( draw->plane[2], 0, -1, 0, 1 ); + ASSIGN_4V( draw->plane[3], 0, 1, 0, 1 ); + ASSIGN_4V( draw->plane[4], 0, 0, 1, 1 ); /* yes these are correct */ + ASSIGN_4V( draw->plane[5], 0, 0, -1, 1 ); /* mesa's a bit wonky */ + draw->nr_planes = 6; + + draw->vf = vf_create( GL_TRUE ); + + return draw; +} + + +void draw_destroy( struct draw_context *draw ) +{ + if (draw->header.storage) + ALIGN_FREE( draw->header.storage ); + + vf_destroy( draw->vf ); + + FREE( draw ); +} + + +/** + * Rebuild the rendering pipeline. + */ +static void validate_pipeline( struct draw_context *draw ) +{ + struct draw_stage *next = draw->pipeline.setup; + + /* + * NOTE: we build up the pipeline in end-to-start order. + * + * TODO: make the current primitive part of the state and build + * shorter pipelines for lines & points. + */ + + if (draw->setup.fill_cw != PIPE_POLYGON_MODE_FILL || + draw->setup.fill_ccw != PIPE_POLYGON_MODE_FILL) { + draw->pipeline.unfilled->next = next; + next = draw->pipeline.unfilled; + } + + if (draw->setup.offset_cw || + draw->setup.offset_ccw) { + draw->pipeline.offset->next = next; + next = draw->pipeline.offset; + } + + if (draw->setup.light_twoside) { + draw->pipeline.twoside->next = next; + next = draw->pipeline.twoside; + } + + /* Always run the cull stage as we calculate determinant there + * also. Fix this.. + */ + { + draw->pipeline.cull->next = next; + next = draw->pipeline.cull; + } + + /* Clip stage + */ + { + draw->pipeline.clip->next = next; + next = draw->pipeline.clip; + } + + /* Do software flatshading prior to clipping. XXX: should only do + * this for clipped primitives, ie it is a part of the clip + * routine. + */ + if (draw->setup.flatshade) { + draw->pipeline.flatshade->next = next; + next = draw->pipeline.flatshade; + } + + draw->pipeline.first = next; +} + + +/** + * Register new primitive setup/rendering state. + * This causes the drawing pipeline to be rebuilt. + */ +void draw_set_setup_state( struct draw_context *draw, + const struct pipe_setup_state *setup ) +{ + memcpy( &draw->setup, setup, sizeof(*setup) ); + validate_pipeline( draw ); +} + + +/** + * Plug in the primitive rendering/rasterization stage. + * This is provided by the device driver. + */ +void draw_set_setup_stage( struct draw_context *draw, + struct draw_stage *stage ) +{ + draw->pipeline.setup = stage; +} + + +/** + * Set the draw module's clipping state. + */ +void draw_set_clip_state( struct draw_context *draw, + const struct pipe_clip_state *clip ) +{ + memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0])); + draw->nr_planes = 6 + clip->nr; +} + + +/** + * Set the draw module's viewport state. + */ +void draw_set_viewport_state( struct draw_context *draw, + const struct pipe_viewport_state *viewport ) +{ + draw->viewport = *viewport; /* struct copy */ + + vf_set_vp_scale_translate( draw->vf, viewport->scale, viewport->translate ); + + /* Using tnl/ and vf/ modules is temporary while getting started. + * Full pipe will have vertex shader, vertex fetch of its own. + */ +} |