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_rasterpos.c | 271 +++++++++++++++++++++++ 1 file changed, 271 insertions(+) create mode 100644 mesalib/src/mesa/state_tracker/st_cb_rasterpos.c (limited to 'mesalib/src/mesa/state_tracker/st_cb_rasterpos.c') diff --git a/mesalib/src/mesa/state_tracker/st_cb_rasterpos.c b/mesalib/src/mesa/state_tracker/st_cb_rasterpos.c new file mode 100644 index 000000000..873560f45 --- /dev/null +++ b/mesalib/src/mesa/state_tracker/st_cb_rasterpos.c @@ -0,0 +1,271 @@ +/************************************************************************** + * + * 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. + * + **************************************************************************/ + +/** + * glRasterPos implementation. Basically render a GL_POINT with our + * private draw module. Plug in a special "rasterpos" stage at the end + * of the 'draw' pipeline to capture the results and update the current + * raster pos attributes. + * + * Authors: + * Brian Paul + */ + + +#include "main/imports.h" +#include "main/macros.h" +#include "main/feedback.h" + +#include "st_context.h" +#include "st_atom.h" +#include "st_draw.h" +#include "st_cb_rasterpos.h" +#include "draw/draw_context.h" +#include "draw/draw_pipe.h" +#include "vbo/vbo.h" + + +#if FEATURE_rastpos + +/** + * Our special drawing pipeline stage (replaces rasterization). + */ +struct rastpos_stage +{ + struct draw_stage stage; /**< Base class */ + struct gl_context *ctx; /**< Rendering context */ + + /* vertex attrib info we can setup once and re-use */ + struct gl_client_array array[VERT_ATTRIB_MAX]; + const struct gl_client_array *arrays[VERT_ATTRIB_MAX]; + struct _mesa_prim prim; +}; + + +static INLINE struct rastpos_stage * +rastpos_stage( struct draw_stage *stage ) +{ + return (struct rastpos_stage *) stage; +} + +static void +rastpos_flush( struct draw_stage *stage, unsigned flags ) +{ + /* no-op */ +} + +static void +rastpos_reset_stipple_counter( struct draw_stage *stage ) +{ + /* no-op */ +} + +static void +rastpos_tri( struct draw_stage *stage, struct prim_header *prim ) +{ + /* should never get here */ + assert(0); +} + +static void +rastpos_line( struct draw_stage *stage, struct prim_header *prim ) +{ + /* should never get here */ + assert(0); +} + +static void +rastpos_destroy(struct draw_stage *stage) +{ + free(stage); +} + + +/** + * Update a raster pos attribute from the vertex result if it's present, + * else copy the current attrib. + */ +static void +update_attrib(struct gl_context *ctx, const GLuint *outputMapping, + const struct vertex_header *vert, + GLfloat *dest, + GLuint result, GLuint defaultAttrib) +{ + const GLfloat *src; + const GLuint k = outputMapping[result]; + if (k != ~0U) + src = vert->data[k]; + else + src = ctx->Current.Attrib[defaultAttrib]; + COPY_4V(dest, src); +} + + +/** + * Normally, this function would render a GL_POINT. + */ +static void +rastpos_point(struct draw_stage *stage, struct prim_header *prim) +{ + struct rastpos_stage *rs = rastpos_stage(stage); + struct gl_context *ctx = rs->ctx; + struct st_context *st = st_context(ctx); + const GLfloat height = (GLfloat) ctx->DrawBuffer->Height; + const GLuint *outputMapping = st->vertex_result_to_slot; + const GLfloat *pos; + GLuint i; + + /* if we get here, we didn't get clipped */ + ctx->Current.RasterPosValid = GL_TRUE; + + /* update raster pos */ + pos = prim->v[0]->data[0]; + ctx->Current.RasterPos[0] = pos[0]; + if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) + ctx->Current.RasterPos[1] = height - pos[1]; /* invert Y */ + else + ctx->Current.RasterPos[1] = pos[1]; + ctx->Current.RasterPos[2] = pos[2]; + ctx->Current.RasterPos[3] = pos[3]; + + /* update other raster attribs */ + update_attrib(ctx, outputMapping, prim->v[0], + ctx->Current.RasterColor, + VERT_RESULT_COL0, VERT_ATTRIB_COLOR0); + + update_attrib(ctx, outputMapping, prim->v[0], + ctx->Current.RasterSecondaryColor, + VERT_RESULT_COL1, VERT_ATTRIB_COLOR1); + + for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) { + update_attrib(ctx, outputMapping, prim->v[0], + ctx->Current.RasterTexCoords[i], + VERT_RESULT_TEX0 + i, VERT_ATTRIB_TEX0 + i); + } + + if (ctx->RenderMode == GL_SELECT) { + _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] ); + } +} + + +/** + * Create rasterpos "drawing" stage. + */ +static struct rastpos_stage * +new_draw_rastpos_stage(struct gl_context *ctx, struct draw_context *draw) +{ + struct rastpos_stage *rs = ST_CALLOC_STRUCT(rastpos_stage); + GLuint i; + + rs->stage.draw = draw; + rs->stage.next = NULL; + rs->stage.point = rastpos_point; + rs->stage.line = rastpos_line; + rs->stage.tri = rastpos_tri; + rs->stage.flush = rastpos_flush; + rs->stage.destroy = rastpos_destroy; + rs->stage.reset_stipple_counter = rastpos_reset_stipple_counter; + rs->stage.destroy = rastpos_destroy; + rs->ctx = ctx; + + for (i = 0; i < Elements(rs->array); i++) { + rs->array[i].Size = 4; + rs->array[i].Type = GL_FLOAT; + rs->array[i].Format = GL_RGBA; + rs->array[i].Stride = 0; + rs->array[i].StrideB = 0; + rs->array[i].Ptr = (GLubyte *) ctx->Current.Attrib[i]; + rs->array[i].Enabled = GL_TRUE; + rs->array[i].Normalized = GL_TRUE; + rs->array[i].BufferObj = NULL; + rs->arrays[i] = &rs->array[i]; + } + + rs->prim.mode = GL_POINTS; + rs->prim.indexed = 0; + rs->prim.begin = 1; + rs->prim.end = 1; + rs->prim.weak = 0; + rs->prim.start = 0; + rs->prim.count = 1; + + return rs; +} + + +static void +st_RasterPos(struct gl_context *ctx, const GLfloat v[4]) +{ + struct st_context *st = st_context(ctx); + struct draw_context *draw = st->draw; + struct rastpos_stage *rs; + + if (st->rastpos_stage) { + /* get rastpos stage info */ + rs = rastpos_stage(st->rastpos_stage); + } + else { + /* create rastpos draw stage */ + rs = new_draw_rastpos_stage(ctx, draw); + st->rastpos_stage = &rs->stage; + } + + /* plug our rastpos stage into the draw module */ + draw_set_rasterize_stage(st->draw, st->rastpos_stage); + + /* make sure everything's up to date */ + st_validate_state(st); + + /* This will get set only if rastpos_point(), above, gets called */ + ctx->Current.RasterPosValid = GL_FALSE; + + /* All vertex attribs but position were previously initialized above. + * Just plug in position pointer now. + */ + rs->array[0].Ptr = (GLubyte *) v; + + /* draw the point */ + st_feedback_draw_vbo(ctx, rs->arrays, &rs->prim, 1, NULL, GL_TRUE, 0, 1); + + /* restore draw's rasterization stage depending on rendermode */ + if (ctx->RenderMode == GL_FEEDBACK) { + draw_set_rasterize_stage(draw, st->feedback_stage); + } + else if (ctx->RenderMode == GL_SELECT) { + draw_set_rasterize_stage(draw, st->selection_stage); + } +} + + + +void st_init_rasterpos_functions(struct dd_function_table *functions) +{ + functions->RasterPos = st_RasterPos; +} + +#endif /* FEATURE_rastpos */ -- cgit v1.2.3