18e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell/************************************************************************** 28e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * 3877128505431adaf817dc8069172ebe4a1cdf5d8José Fonseca * Copyright 2007 VMware, Inc. 48e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * All Rights Reserved. 58e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * 68e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * Permission is hereby granted, free of charge, to any person obtaining a 78e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * copy of this software and associated documentation files (the 88e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * "Software"), to deal in the Software without restriction, including 98e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * without limitation the rights to use, copy, modify, merge, publish, 108e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * distribute, sub license, and/or sell copies of the Software, and to 118e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * permit persons to whom the Software is furnished to do so, subject to 128e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * the following conditions: 138e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * 148e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * The above copyright notice and this permission notice (including the 158e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * next paragraph) shall be included in all copies or substantial portions 168e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * of the Software. 178e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * 188e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 198e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 208e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21877128505431adaf817dc8069172ebe4a1cdf5d8José Fonseca * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 228e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 238e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 248e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 258e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * 268e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell **************************************************************************/ 278e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell 288e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell 29101d1a658a614d1e2ec02b1e697f6161291af653José Fonseca#include "main/context.h" 306340e609a354770e04192b9b44e91fb06aab0159Mathias Fröhlich#include "main/viewport.h" 318e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell#include "st_context.h" 328e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell#include "st_atom.h" 337d95efde0a0e13e13c59444703bc47eb13926385Brian Paul#include "pipe/p_context.h" 347d95efde0a0e13e13c59444703bc47eb13926385Brian Paul#include "cso_cache/cso_context.h" 358e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell 368e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell/** 378e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * Update the viewport transformation matrix. Depends on: 388e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * - viewport pos/size 398e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * - depthrange 408e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell * - window pos/size or FBO size 418e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell */ 424698483f849ba8dfde20a5d649f1ea099291f241Brian Paulstatic void 434698483f849ba8dfde20a5d649f1ea099291f241Brian Paulupdate_viewport( struct st_context *st ) 448e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell{ 45f9995b30756140724f41daf963fa06167912be7fKristian Høgsberg struct gl_context *ctx = st->ctx; 463d31252d44fb5983a089b9f3488745757772adeaBrian Paul GLfloat yScale, yBias; 473cb10cce371cb62e0c4a988ab939bf640b75ebabJan Vesely unsigned i; 483d31252d44fb5983a089b9f3488745757772adeaBrian Paul /* _NEW_BUFFERS 493d31252d44fb5983a089b9f3488745757772adeaBrian Paul */ 504698483f849ba8dfde20a5d649f1ea099291f241Brian Paul if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) { 51bd67962c5e8469062516da396e9c466a9446e00dBrian Paul /* Drawing to a window. The corresponding gallium surface uses 52bd67962c5e8469062516da396e9c466a9446e00dBrian Paul * Y=0=TOP but OpenGL is Y=0=BOTTOM. So we need to invert the viewport. 53bd67962c5e8469062516da396e9c466a9446e00dBrian Paul */ 543d31252d44fb5983a089b9f3488745757772adeaBrian Paul yScale = -1; 5553174afeeb68a79e471185cb463c13ff90af698fJosé Fonseca yBias = (GLfloat)ctx->DrawBuffer->Height; 563d31252d44fb5983a089b9f3488745757772adeaBrian Paul } 573d31252d44fb5983a089b9f3488745757772adeaBrian Paul else { 58bd67962c5e8469062516da396e9c466a9446e00dBrian Paul /* Drawing to an FBO where Y=0=BOTTOM, like OpenGL - don't invert */ 593d31252d44fb5983a089b9f3488745757772adeaBrian Paul yScale = 1.0; 603d31252d44fb5983a089b9f3488745757772adeaBrian Paul yBias = 0.0; 618e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell } 628e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell 633d31252d44fb5983a089b9f3488745757772adeaBrian Paul /* _NEW_VIEWPORT 643d31252d44fb5983a089b9f3488745757772adeaBrian Paul */ 650705fa35cdaf15ec969c28dc85e88b8be1149a3bDave Airlie for (i = 0; i < ctx->Const.MaxViewports; i++) 668e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell { 67f8a647883a14694f1b758c12187b3f35b9d039a7Matt Turner float scale[3], translate[3]; 686340e609a354770e04192b9b44e91fb06aab0159Mathias Fröhlich _mesa_get_viewport_xform(ctx, i, scale, translate); 696340e609a354770e04192b9b44e91fb06aab0159Mathias Fröhlich 706340e609a354770e04192b9b44e91fb06aab0159Mathias Fröhlich st->state.viewport[i].scale[0] = scale[0]; 716340e609a354770e04192b9b44e91fb06aab0159Mathias Fröhlich st->state.viewport[i].scale[1] = scale[1] * yScale; 726340e609a354770e04192b9b44e91fb06aab0159Mathias Fröhlich st->state.viewport[i].scale[2] = scale[2]; 738e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell 746340e609a354770e04192b9b44e91fb06aab0159Mathias Fröhlich st->state.viewport[i].translate[0] = translate[0]; 756340e609a354770e04192b9b44e91fb06aab0159Mathias Fröhlich st->state.viewport[i].translate[1] = translate[1] * yScale + yBias; 766340e609a354770e04192b9b44e91fb06aab0159Mathias Fröhlich st->state.viewport[i].translate[2] = translate[2]; 778e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell } 780705fa35cdaf15ec969c28dc85e88b8be1149a3bDave Airlie 790705fa35cdaf15ec969c28dc85e88b8be1149a3bDave Airlie cso_set_viewport(st->cso_context, &st->state.viewport[0]); 800705fa35cdaf15ec969c28dc85e88b8be1149a3bDave Airlie if (ctx->Const.MaxViewports > 1) 810705fa35cdaf15ec969c28dc85e88b8be1149a3bDave Airlie st->pipe->set_viewport_states(st->pipe, 1, ctx->Const.MaxViewports - 1, &st->state.viewport[1]); 828e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell} 838e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell 848e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell 858e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwellconst struct st_tracked_state st_update_viewport = { 8654507125e735ffa595e252282eaabf38095c21e1Alan Hourihane update_viewport /* update */ 878e4a95a93d15a6707a29454cd47e10b08314cda2Keith Whitwell}; 88