diff options
Diffstat (limited to 'src/gallium/drivers/softpipe/sp_state_derived.c')
| -rw-r--r-- | src/gallium/drivers/softpipe/sp_state_derived.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/src/gallium/drivers/softpipe/sp_state_derived.c b/src/gallium/drivers/softpipe/sp_state_derived.c new file mode 100644 index 00000000000..372597869f3 --- /dev/null +++ b/src/gallium/drivers/softpipe/sp_state_derived.c @@ -0,0 +1,235 @@ +/************************************************************************** + * + * Copyright 2003 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. + * + **************************************************************************/ + +#include "pipe/p_util.h" +#include "pipe/p_shader_tokens.h" +#include "pipe/draw/draw_context.h" +#include "pipe/draw/draw_vertex.h" +#include "pipe/draw/draw_private.h" +#include "sp_context.h" +#include "sp_state.h" + + +/** + * Search vertex program's outputs to find a match for the given + * semantic name/index. Return the index of the output slot. + * + * Return 0 if not found. This will cause the fragment program to use + * vertex attrib 0 (position) in the cases where the fragment program + * attempts to use a missing vertex program output. This is an undefined + * condition that users shouldn't hit anyway. + */ +static int +find_vs_output(const struct pipe_shader_state *vs, + uint semantic_name, + uint semantic_index) +{ + uint i; + for (i = 0; i < vs->num_outputs; i++) { + if (vs->output_semantic_name[i] == semantic_name && + vs->output_semantic_index[i] == semantic_index) + return i; + } + return 0; +} + + +/** + * Mark the current vertex layout as "invalid". + * We'll validate the vertex layout later, when we start to actually + * render a point or line or tri. + */ +static void +invalidate_vertex_layout(struct softpipe_context *softpipe) +{ + softpipe->vertex_info.num_attribs = 0; +} + + +/** + * The vertex info describes how to convert the post-transformed vertices + * (simple float[][4]) used by the 'draw' module into vertices for + * rasterization. + * + * This function validates the vertex layout and returns a pointer to a + * vertex_info object. + */ +struct vertex_info * +softpipe_get_vertex_info(struct softpipe_context *softpipe) +{ + struct vertex_info *vinfo = &softpipe->vertex_info; + + if (vinfo->num_attribs == 0) { + /* compute vertex layout now */ + const struct pipe_shader_state *vs = &softpipe->vs->shader; + const struct pipe_shader_state *fs = &softpipe->fs->shader; + const enum interp_mode colorInterp + = softpipe->rasterizer->flatshade ? INTERP_CONSTANT : INTERP_LINEAR; + uint i; + + if (softpipe->vbuf) { + /* if using the post-transform vertex buffer, tell draw_vbuf to + * simply emit the whole post-xform vertex as-is: + */ + struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf; + vinfo_vbuf->num_attribs = 0; + draw_emit_vertex_attr(vinfo_vbuf, EMIT_ALL, INTERP_NONE, 0); + vinfo_vbuf->size = 4 * vs->num_outputs + + sizeof(struct vertex_header) / 4; + } + + /* + * Loop over fragment shader inputs, searching for the matching output + * from the vertex shader. + */ + vinfo->num_attribs = 0; + for (i = 0; i < fs->num_inputs; i++) { + int src; + switch (fs->input_semantic_name[i]) { + case TGSI_SEMANTIC_POSITION: + src = find_vs_output(vs, TGSI_SEMANTIC_POSITION, 0); + draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_POS, src); + break; + + case TGSI_SEMANTIC_COLOR: + src = find_vs_output(vs, TGSI_SEMANTIC_COLOR, + fs->input_semantic_index[i]); + draw_emit_vertex_attr(vinfo, EMIT_4F, colorInterp, src); + break; + + case TGSI_SEMANTIC_FOG: + src = find_vs_output(vs, TGSI_SEMANTIC_FOG, 0); + draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src); + break; + + case TGSI_SEMANTIC_GENERIC: + /* this includes texcoords and varying vars */ + src = find_vs_output(vs, TGSI_SEMANTIC_GENERIC, + fs->input_semantic_index[i]); + draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_PERSPECTIVE, src); + break; + + default: + assert(0); + } + } + + softpipe->psize_slot = find_vs_output(vs, TGSI_SEMANTIC_PSIZE, 0); + if (softpipe->psize_slot > 0) { + draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, + softpipe->psize_slot); + } + + draw_compute_vertex_size(vinfo); + } + + return vinfo; +} + + +/** + * Called from vbuf module. + * + * Note that there's actually two different vertex layouts in softpipe. + * + * The normal one is computed in softpipe_get_vertex_info() above and is + * used by the point/line/tri "setup" code. + * + * The other one (this one) is only used by the vbuf module (which is + * not normally used by default but used in testing). For the vbuf module, + * we basically want to pass-through the draw module's vertex layout as-is. + * When the softpipe vbuf code begins drawing, the normal vertex layout + * will come into play again. + */ +struct vertex_info * +softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe) +{ + (void) softpipe_get_vertex_info(softpipe); + return &softpipe->vertex_info_vbuf; +} + + +/** + * Recompute cliprect from scissor bounds, scissor enable and surface size. + */ +static void +compute_cliprect(struct softpipe_context *sp) +{ + unsigned surfWidth, surfHeight; + + if (sp->framebuffer.num_cbufs > 0) { + surfWidth = sp->framebuffer.cbufs[0]->width; + surfHeight = sp->framebuffer.cbufs[0]->height; + } + else { + /* no surface? */ + surfWidth = sp->scissor.maxx; + surfHeight = sp->scissor.maxy; + } + + if (sp->rasterizer->scissor) { + /* 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); + 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; + sp->cliprect.maxy = surfHeight; + } +} + + +/* Hopefully this will remain quite simple, otherwise need to pull in + * something like the state tracker mechanism. + */ +void softpipe_update_derived( struct softpipe_context *softpipe ) +{ + if (softpipe->dirty & (SP_NEW_RASTERIZER | + SP_NEW_FS | + SP_NEW_VS)) + invalidate_vertex_layout( softpipe ); + + if (softpipe->dirty & (SP_NEW_SCISSOR | + SP_NEW_DEPTH_STENCIL_ALPHA | + SP_NEW_FRAMEBUFFER)) + compute_cliprect(softpipe); + + if (softpipe->dirty & (SP_NEW_BLEND | + SP_NEW_DEPTH_STENCIL_ALPHA | + SP_NEW_FRAMEBUFFER | + SP_NEW_RASTERIZER | + SP_NEW_FS | + SP_NEW_QUERY)) + sp_build_quad_pipeline(softpipe); + + softpipe->dirty = 0; +} |