1 /************************************************************************** 2 * 3 * Copyright 2009 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 #include "main/glheader.h" 29 #include "st_context.h" 30 #include "st_cb_viewport.h" 31 32 #include "pipe/p_state.h" 33 #include "pipe/p_defines.h" 34 #include "util/u_atomic.h" 35 36 /** 37 * Cast wrapper to convert a struct gl_framebuffer to an st_framebuffer. 38 * Return NULL if the struct gl_framebuffer is a user-created framebuffer. 39 * We'll only return non-null for window system framebuffers. 40 * Note that this function may fail. 41 */ 42 static inline struct st_framebuffer * 43 st_ws_framebuffer(struct gl_framebuffer *fb) 44 { 45 /* FBO cannot be casted. See st_new_framebuffer */ 46 if (fb && _mesa_is_winsys_fbo(fb)) 47 return (struct st_framebuffer *) fb; 48 return NULL; 49 } 50 51 static void st_viewport(struct gl_context *ctx) 52 { 53 struct st_context *st = ctx->st; 54 struct st_framebuffer *stdraw; 55 struct st_framebuffer *stread; 56 57 if (!st->invalidate_on_gl_viewport) 58 return; 59 60 /* 61 * Normally we'd want the state tracker manager to mark the drawables 62 * invalid only when needed. This will force the state tracker manager 63 * to revalidate the drawable, rather than just update the context with 64 * the latest cached drawable info. 65 */ 66 67 stdraw = st_ws_framebuffer(st->ctx->DrawBuffer); 68 stread = st_ws_framebuffer(st->ctx->ReadBuffer); 69 70 if (stdraw && stdraw->iface) 71 stdraw->iface_stamp = p_atomic_read(&stdraw->iface->stamp) - 1; 72 if (stread && stread != stdraw && stread->iface) 73 stread->iface_stamp = p_atomic_read(&stread->iface->stamp) - 1; 74 } 75 76 void st_init_viewport_functions(struct dd_function_table *functions) 77 { 78 functions->Viewport = st_viewport; 79 } 80