From 807c6931fe683fd844ceec1b023232181e6aae03 Mon Sep 17 00:00:00 2001 From: marha Date: Tue, 28 Dec 2010 16:10:20 +0000 Subject: xserver and mesa git update 28-12-2010 --- mesalib/src/mesa/state_tracker/st_cb_feedback.c | 308 ++++++++++++++++++++++++ 1 file changed, 308 insertions(+) create mode 100644 mesalib/src/mesa/state_tracker/st_cb_feedback.c (limited to 'mesalib/src/mesa/state_tracker/st_cb_feedback.c') diff --git a/mesalib/src/mesa/state_tracker/st_cb_feedback.c b/mesalib/src/mesa/state_tracker/st_cb_feedback.c new file mode 100644 index 000000000..6717c4c7a --- /dev/null +++ b/mesalib/src/mesa/state_tracker/st_cb_feedback.c @@ -0,0 +1,308 @@ +/************************************************************************** + * + * 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. + * + **************************************************************************/ + +/** + * GL_SELECT and GL_FEEDBACK render modes. + * Basically, we use a private instance of the 'draw' module for doing + * selection/feedback. It would be nice to use the transform_feedback + * hardware feature, but it's defined as happening pre-clip and we want + * post-clipped primitives. Also, there's concerns about the efficiency + * of using the hardware for this anyway. + * + * Authors: + * Brian Paul + */ + +#include "main/imports.h" +#include "main/context.h" +#include "main/feedback.h" + +#include "vbo/vbo.h" + +#include "st_context.h" +#include "st_draw.h" +#include "st_cb_feedback.h" + +#include "pipe/p_context.h" +#include "pipe/p_defines.h" + +#include "draw/draw_context.h" +#include "draw/draw_pipe.h" + + +#if FEATURE_feedback + +/** + * This is actually used for both feedback and selection. + */ +struct feedback_stage +{ + struct draw_stage stage; /**< Base class */ + struct gl_context *ctx; /**< Rendering context */ + GLboolean reset_stipple_counter; +}; + + +/********************************************************************** + * GL Feedback functions + **********************************************************************/ + +static INLINE struct feedback_stage * +feedback_stage( struct draw_stage *stage ) +{ + return (struct feedback_stage *)stage; +} + + +static void +feedback_vertex(struct gl_context *ctx, const struct draw_context *draw, + const struct vertex_header *v) +{ + const struct st_context *st = st_context(ctx); + GLfloat win[4]; + const GLfloat *color, *texcoord; + GLuint slot; + + /* Recall that Y=0=Top of window for Gallium wincoords */ + win[0] = v->data[0][0]; + win[1] = ctx->DrawBuffer->Height - v->data[0][1]; + win[2] = v->data[0][2]; + win[3] = 1.0F / v->data[0][3]; + + /* XXX + * When we compute vertex layout, save info about position of the + * color and texcoord attribs to use here. + */ + + slot = st->vertex_result_to_slot[VERT_RESULT_COL0]; + if (slot != ~0U) + color = v->data[slot]; + else + color = ctx->Current.Attrib[VERT_ATTRIB_COLOR0]; + + slot = st->vertex_result_to_slot[VERT_RESULT_TEX0]; + if (slot != ~0U) + texcoord = v->data[slot]; + else + texcoord = ctx->Current.Attrib[VERT_ATTRIB_TEX0]; + + _mesa_feedback_vertex(ctx, win, color, texcoord); +} + + +static void +feedback_tri( struct draw_stage *stage, struct prim_header *prim ) +{ + struct feedback_stage *fs = feedback_stage(stage); + struct draw_context *draw = stage->draw; + _mesa_feedback_token(fs->ctx, (GLfloat) GL_POLYGON_TOKEN); + _mesa_feedback_token(fs->ctx, (GLfloat) 3); /* three vertices */ + feedback_vertex(fs->ctx, draw, prim->v[0]); + feedback_vertex(fs->ctx, draw, prim->v[1]); + feedback_vertex(fs->ctx, draw, prim->v[2]); +} + + +static void +feedback_line( struct draw_stage *stage, struct prim_header *prim ) +{ + struct feedback_stage *fs = feedback_stage(stage); + struct draw_context *draw = stage->draw; + if (fs->reset_stipple_counter) { + _mesa_feedback_token(fs->ctx, (GLfloat) GL_LINE_RESET_TOKEN); + fs->reset_stipple_counter = GL_FALSE; + } + else { + _mesa_feedback_token(fs->ctx, (GLfloat) GL_LINE_TOKEN); + } + feedback_vertex(fs->ctx, draw, prim->v[0]); + feedback_vertex(fs->ctx, draw, prim->v[1]); +} + + +static void +feedback_point( struct draw_stage *stage, struct prim_header *prim ) +{ + struct feedback_stage *fs = feedback_stage(stage); + struct draw_context *draw = stage->draw; + _mesa_feedback_token(fs->ctx, (GLfloat) GL_POINT_TOKEN); + feedback_vertex(fs->ctx, draw, prim->v[0]); +} + + +static void +feedback_flush( struct draw_stage *stage, unsigned flags ) +{ + /* no-op */ +} + + +static void +feedback_reset_stipple_counter( struct draw_stage *stage ) +{ + struct feedback_stage *fs = feedback_stage(stage); + fs->reset_stipple_counter = GL_TRUE; +} + + +static void +feedback_destroy( struct draw_stage *stage ) +{ + /* no-op */ +} + +/** + * Create GL feedback drawing stage. + */ +static struct draw_stage * +draw_glfeedback_stage(struct gl_context *ctx, struct draw_context *draw) +{ + struct feedback_stage *fs = ST_CALLOC_STRUCT(feedback_stage); + + fs->stage.draw = draw; + fs->stage.next = NULL; + fs->stage.point = feedback_point; + fs->stage.line = feedback_line; + fs->stage.tri = feedback_tri; + fs->stage.flush = feedback_flush; + fs->stage.reset_stipple_counter = feedback_reset_stipple_counter; + fs->stage.destroy = feedback_destroy; + fs->ctx = ctx; + + return &fs->stage; +} + + + +/********************************************************************** + * GL Selection functions + **********************************************************************/ + +static void +select_tri( struct draw_stage *stage, struct prim_header *prim ) +{ + struct feedback_stage *fs = feedback_stage(stage); + _mesa_update_hitflag( fs->ctx, prim->v[0]->data[0][2] ); + _mesa_update_hitflag( fs->ctx, prim->v[1]->data[0][2] ); + _mesa_update_hitflag( fs->ctx, prim->v[2]->data[0][2] ); +} + +static void +select_line( struct draw_stage *stage, struct prim_header *prim ) +{ + struct feedback_stage *fs = feedback_stage(stage); + _mesa_update_hitflag( fs->ctx, prim->v[0]->data[0][2] ); + _mesa_update_hitflag( fs->ctx, prim->v[1]->data[0][2] ); +} + + +static void +select_point( struct draw_stage *stage, struct prim_header *prim ) +{ + struct feedback_stage *fs = feedback_stage(stage); + _mesa_update_hitflag( fs->ctx, prim->v[0]->data[0][2] ); +} + + +static void +select_flush( struct draw_stage *stage, unsigned flags ) +{ + /* no-op */ +} + + +static void +select_reset_stipple_counter( struct draw_stage *stage ) +{ + /* no-op */ +} + +static void +select_destroy( struct draw_stage *stage ) +{ + /* no-op */ +} + + +/** + * Create GL selection mode drawing stage. + */ +static struct draw_stage * +draw_glselect_stage(struct gl_context *ctx, struct draw_context *draw) +{ + struct feedback_stage *fs = ST_CALLOC_STRUCT(feedback_stage); + + fs->stage.draw = draw; + fs->stage.next = NULL; + fs->stage.point = select_point; + fs->stage.line = select_line; + fs->stage.tri = select_tri; + fs->stage.flush = select_flush; + fs->stage.reset_stipple_counter = select_reset_stipple_counter; + fs->stage.destroy = select_destroy; + fs->ctx = ctx; + + return &fs->stage; +} + + +static void +st_RenderMode(struct gl_context *ctx, GLenum newMode ) +{ + struct st_context *st = st_context(ctx); + struct draw_context *draw = st->draw; + + if (newMode == GL_RENDER) { + /* restore normal VBO draw function */ + vbo_set_draw_func(ctx, st_draw_vbo); + } + else if (newMode == GL_SELECT) { + if (!st->selection_stage) + st->selection_stage = draw_glselect_stage(ctx, draw); + draw_set_rasterize_stage(draw, st->selection_stage); + /* Plug in new vbo draw function */ + vbo_set_draw_func(ctx, st_feedback_draw_vbo); + } + else { + if (!st->feedback_stage) + st->feedback_stage = draw_glfeedback_stage(ctx, draw); + draw_set_rasterize_stage(draw, st->feedback_stage); + /* Plug in new vbo draw function */ + vbo_set_draw_func(ctx, st_feedback_draw_vbo); + /* need to generate/use a vertex program that emits pos/color/tex */ + st->dirty.st |= ST_NEW_VERTEX_PROGRAM; + } +} + + + +void st_init_feedback_functions(struct dd_function_table *functions) +{ + functions->RenderMode = st_RenderMode; +} + +#endif /* FEATURE_feedback */ -- cgit v1.2.3