1f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/************************************************************************** 2f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 3f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 4f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * All Rights Reserved. 5f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 6f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Permission is hereby granted, free of charge, to any person obtaining a 7f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * copy of this software and associated documentation files (the 8f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * "Software"), to deal in the Software without restriction, including 9f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * without limitation the rights to use, copy, modify, merge, publish, 10f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * distribute, sub license, and/or sell copies of the Software, and to 11f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * permit persons to whom the Software is furnished to do so, subject to 12f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * the following conditions: 13f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 14f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * The above copyright notice and this permission notice (including the 15f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * next paragraph) shall be included in all copies or substantial portions 16f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * of the Software. 17f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 18f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 22f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 26f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org **************************************************************************/ 27f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 28f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* 29f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * \brief polygon stipple state 30f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 31f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Authors: 32f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Brian Paul 33f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 34f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 35f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 36f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include <assert.h> 37f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 38f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "st_context.h" 39f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "st_atom.h" 40f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "pipe/p_context.h" 41f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#include "pipe/p_defines.h" 42f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 43f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 44f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** 45f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * OpenGL's polygon stipple is indexed with window coordinates in which 46f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * the origin (0,0) is the lower-left corner of the window. 47f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * With Gallium, the origin is the upper-left corner of the window. 48f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * To convert GL's polygon stipple to what gallium expects we need to 49f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * invert the pattern vertically and rotate the stipple rows according 50f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * to the window height. 51f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 52f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic void 53f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orginvert_stipple(GLuint dest[32], const GLuint src[32], GLuint winHeight) 54f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 55f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org GLuint i; 56f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 57f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org for (i = 0; i < 32; i++) { 58f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org dest[i] = src[(winHeight - 1 - i) & 0x1f]; 59f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 60f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 61f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 62f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 63f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 64f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic void 65f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgupdate_stipple( struct st_context *st ) 66f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 67f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const struct gl_context *ctx = st->ctx; 68f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const GLuint sz = sizeof(st->state.poly_stipple); 69f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org assert(sz == sizeof(ctx->PolygonStipple)); 70f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 71f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (memcmp(st->state.poly_stipple, ctx->PolygonStipple, sz)) { 72f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* state has changed */ 73f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org struct pipe_poly_stipple newStipple; 74f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 75f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org memcpy(st->state.poly_stipple, ctx->PolygonStipple, sz); 76f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 77f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org invert_stipple(newStipple.stipple, ctx->PolygonStipple, 78f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ctx->DrawBuffer->Height); 79f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 80f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org st->pipe->set_polygon_stipple(st->pipe, &newStipple); 81f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 82f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 83f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 84f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 85f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/** Update the stipple when the pattern or window height changes */ 86f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgconst struct st_tracked_state st_update_polygon_stipple = { 87f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org "st_update_polygon_stipple", /* name */ 88f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org { /* dirty */ 89f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org (_NEW_POLYGONSTIPPLE | 90f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org _NEW_BUFFERS), /* mesa */ 91f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 0, /* st */ 92f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org }, 93f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org update_stipple /* update */ 94f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org}; 95