1 /************************************************************************** 2 * 3 * Copyright 2007 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 29 #include "main/context.h" 30 #include "main/viewport.h" 31 #include "st_context.h" 32 #include "st_atom.h" 33 #include "pipe/p_context.h" 34 #include "cso_cache/cso_context.h" 35 36 /** 37 * Update the viewport transformation matrix. Depends on: 38 * - viewport pos/size 39 * - depthrange 40 * - window pos/size or FBO size 41 */ 42 void 43 st_update_viewport( struct st_context *st ) 44 { 45 struct gl_context *ctx = st->ctx; 46 unsigned i; 47 48 /* _NEW_VIEWPORT 49 */ 50 for (i = 0; i < st->state.num_viewports; i++) { 51 float *scale = st->state.viewport[i].scale; 52 float *translate = st->state.viewport[i].translate; 53 54 _mesa_get_viewport_xform(ctx, i, scale, translate); 55 56 /* _NEW_BUFFERS */ 57 /* Drawing to a window where the coordinate system is upside down. */ 58 if (st->state.fb_orientation == Y_0_TOP) { 59 scale[1] *= -1; 60 translate[1] = st->state.fb_height - translate[1]; 61 } 62 } 63 64 cso_set_viewport(st->cso_context, &st->state.viewport[0]); 65 66 if (st->state.num_viewports > 1) { 67 struct pipe_context *pipe = st->pipe; 68 69 pipe->set_viewport_states(pipe, 1, st->state.num_viewports - 1, 70 &st->state.viewport[1]); 71 } 72 } 73
