Subversion Repositories Kolibri OS

/**************************************************************************

 *

 * 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 "util/u_inlines.h"

#include "util/u_math.h"

#include "util/u_memory.h"

#include "util/u_pstipple.h"

#include "pipe/p_shader_tokens.h"

#include "draw/draw_context.h"

#include "draw/draw_vertex.h"

#include "sp_context.h"

#include "sp_screen.h"

#include "sp_state.h"

#include "sp_texture.h"

#include "sp_tex_sample.h"

#include "sp_tex_tile_cache.h"

/**

 * 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 tgsi_shader_info *fsInfo = &softpipe->fs_variant->info;

      struct vertex_info *vinfo_vbuf = &softpipe->vertex_info_vbuf;

      const uint num = draw_num_shader_outputs(softpipe->draw);

      uint i;

      /* Tell draw_vbuf to simply emit the whole post-xform vertex

       * as-is.  No longer any need to try and emit draw vertex_header

       * info.

       */

      vinfo_vbuf->num_attribs = 0;

      for (i = 0; i < num; i++) {

	 draw_emit_vertex_attr(vinfo_vbuf, EMIT_4F, INTERP_PERSPECTIVE, i);

      }

      draw_compute_vertex_size(vinfo_vbuf);

      /*

       * Loop over fragment shader inputs, searching for the matching output

       * from the vertex shader.

       */

      vinfo->num_attribs = 0;

      for (i = 0; i < fsInfo->num_inputs; i++) {

         int src;

         enum interp_mode interp = INTERP_LINEAR;

         switch (fsInfo->input_interpolate[i]) {

         case TGSI_INTERPOLATE_CONSTANT:

            interp = INTERP_CONSTANT;

            break;

         case TGSI_INTERPOLATE_LINEAR:

            interp = INTERP_LINEAR;

            break;

         case TGSI_INTERPOLATE_PERSPECTIVE:

            interp = INTERP_PERSPECTIVE;

            break;

         case TGSI_INTERPOLATE_COLOR:

            assert(fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR);

            break;

         default:

            assert(0);

         }

         switch (fsInfo->input_semantic_name[i]) {

         case TGSI_SEMANTIC_POSITION:

            interp = INTERP_POS;

            break;

         case TGSI_SEMANTIC_COLOR:

            if (fsInfo->input_interpolate[i] == TGSI_INTERPOLATE_COLOR) {

               if (softpipe->rasterizer->flatshade)

                  interp = INTERP_CONSTANT;

               else

                  interp = INTERP_PERSPECTIVE;

            }

            break;

         }

         /* this includes texcoords and varying vars */

         src = draw_find_shader_output(softpipe->draw,

                                       fsInfo->input_semantic_name[i],

                                       fsInfo->input_semantic_index[i]);

	 if (fsInfo->input_semantic_name[i] == TGSI_SEMANTIC_COLOR && src == -1)

	   /* try and find a bcolor */

	   src = draw_find_shader_output(softpipe->draw,

					 TGSI_SEMANTIC_BCOLOR, fsInfo->input_semantic_index[i]);

         draw_emit_vertex_attr(vinfo, EMIT_4F, interp, src);

      }

      softpipe->psize_slot = draw_find_shader_output(softpipe->draw,

                                                 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)

{

   /* SP_NEW_FRAMEBUFFER

    */

   uint surfWidth = sp->framebuffer.width;

   uint surfHeight = sp->framebuffer.height;

   /* SP_NEW_RASTERIZER

    */

   if (sp->rasterizer->scissor) {

      /* SP_NEW_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;

   }

}

static void

set_shader_sampler(struct softpipe_context *softpipe,

                   unsigned shader,

                   int max_sampler)

{

   int i;

   for (i = 0; i <= max_sampler; i++) {

      softpipe->tgsi.sampler[shader]->sp_sampler[i] =

         (struct sp_sampler *)(softpipe->samplers[shader][i]);

   }

}

static void

update_tgsi_samplers( struct softpipe_context *softpipe )

{

   unsigned i, sh;

   set_shader_sampler(softpipe, PIPE_SHADER_VERTEX,

                      softpipe->vs->max_sampler);

   set_shader_sampler(softpipe, PIPE_SHADER_FRAGMENT,

                      softpipe->fs_variant->info.file_max[TGSI_FILE_SAMPLER]);

   if (softpipe->gs) {

      set_shader_sampler(softpipe, PIPE_SHADER_GEOMETRY,

                         softpipe->gs->max_sampler);

   }

   /* XXX is this really necessary here??? */

   for (sh = 0; sh < Elements(softpipe->tex_cache); sh++) {

      for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {

         struct softpipe_tex_tile_cache *tc = softpipe->tex_cache[sh][i];

         if (tc && tc->texture) {

            struct softpipe_resource *spt = softpipe_resource(tc->texture);

            if (spt->timestamp != tc->timestamp) {

               sp_tex_tile_cache_validate_texture( tc );

               /*

                 _debug_printf("INV %d %d\n", tc->timestamp, spt->timestamp);

               */

               tc->timestamp = spt->timestamp;

            }

         }

      }

   }

}

static void

update_fragment_shader(struct softpipe_context *softpipe, unsigned prim)

{

   struct sp_fragment_shader_variant_key key;

   memset(&key, 0, sizeof(key));

   if (prim == PIPE_PRIM_TRIANGLES)

      key.polygon_stipple = softpipe->rasterizer->poly_stipple_enable;

   if (softpipe->fs) {

      softpipe->fs_variant = softpipe_find_fs_variant(softpipe,

                                                      softpipe->fs, &key);

      /* prepare the TGSI interpreter for FS execution */

      softpipe->fs_variant->prepare(softpipe->fs_variant,

                                    softpipe->fs_machine,

                                    (struct tgsi_sampler *) softpipe->

                                    tgsi.sampler[PIPE_SHADER_FRAGMENT]);

   }

   else {

      softpipe->fs_variant = NULL;

   }

   /* This would be the logical place to pass the fragment shader

    * to the draw module.  However, doing this here, during state

    * validation, causes problems with the 'draw' module helpers for

    * wide/AA/stippled lines.

    * In principle, the draw's fragment shader should be per-variant

    * but that doesn't work.  So we use a single draw fragment shader

    * per fragment shader, not per variant.

    */

#if 0

   if (softpipe->fs_variant) {

      draw_bind_fragment_shader(softpipe->draw,

                                softpipe->fs_variant->draw_shader);

   }

   else {

      draw_bind_fragment_shader(softpipe->draw, NULL);

   }

#endif

}

/**

 * This should be called when the polygon stipple pattern changes.

 * We create a new texture from the stipple pattern and create a new

 * sampler view.

 */

static void

update_polygon_stipple_pattern(struct softpipe_context *softpipe)

{

   struct pipe_resource *tex;

   struct pipe_sampler_view *view;

   tex = util_pstipple_create_stipple_texture(&softpipe->pipe,

                                              softpipe->poly_stipple.stipple);

   pipe_resource_reference(&softpipe->pstipple.texture, tex);

   pipe_resource_reference(&tex, NULL);

   view = util_pstipple_create_sampler_view(&softpipe->pipe,

                                            softpipe->pstipple.texture);

   pipe_sampler_view_reference(&softpipe->pstipple.sampler_view, view);

   pipe_sampler_view_reference(&view, NULL);

}

/**

 * Should be called when polygon stipple is enabled/disabled or when

 * the fragment shader changes.

 * We add/update the fragment sampler and sampler views to sample from

 * the polygon stipple texture.  The texture unit that we use depends on

 * the fragment shader (we need to use a unit not otherwise used by the

 * shader).

 */

static void

update_polygon_stipple_enable(struct softpipe_context *softpipe, unsigned prim)

{

   if (prim == PIPE_PRIM_TRIANGLES &&

       softpipe->fs_variant->key.polygon_stipple) {

      const unsigned unit = softpipe->fs_variant->stipple_sampler_unit;

      /* sampler state */

      softpipe->samplers[PIPE_SHADER_FRAGMENT][unit] = softpipe->pstipple.sampler;

      /* sampler view state */

      softpipe_set_sampler_views(&softpipe->pipe, PIPE_SHADER_FRAGMENT,

                                 unit, 1, &softpipe->pstipple.sampler_view);

      softpipe->dirty |= SP_NEW_SAMPLER;

   }

}

/* 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, unsigned prim)

{

   struct softpipe_screen *sp_screen = softpipe_screen(softpipe->pipe.screen);

   /* Check for updated textures.

    */

   if (softpipe->tex_timestamp != sp_screen->timestamp) {

      softpipe->tex_timestamp = sp_screen->timestamp;

      softpipe->dirty |= SP_NEW_TEXTURE;

   }

#if DO_PSTIPPLE_IN_HELPER_MODULE

   if (softpipe->dirty & SP_NEW_STIPPLE)

      /* before updating samplers! */

      update_polygon_stipple_pattern(softpipe);

#endif

   if (softpipe->dirty & (SP_NEW_RASTERIZER |

                          SP_NEW_FS))

      update_fragment_shader(softpipe, prim);

#if DO_PSTIPPLE_IN_HELPER_MODULE

   if (softpipe->dirty & (SP_NEW_RASTERIZER |

                          SP_NEW_STIPPLE |

                          SP_NEW_FS))

      update_polygon_stipple_enable(softpipe, prim);

#endif

   /* TODO: this looks suboptimal */

   if (softpipe->dirty & (SP_NEW_SAMPLER |

                          SP_NEW_TEXTURE |

                          SP_NEW_FS |

                          SP_NEW_VS))

      update_tgsi_samplers( 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_RASTERIZER |

                          SP_NEW_FRAMEBUFFER))

      compute_cliprect(softpipe);

   if (softpipe->dirty & (SP_NEW_BLEND |

                          SP_NEW_DEPTH_STENCIL_ALPHA |

                          SP_NEW_FRAMEBUFFER |

                          SP_NEW_FS))

      sp_build_quad_pipeline(softpipe);

   softpipe->dirty = 0;

}