1ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston/* 27d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4Jeremy Huddleston Copyright (c) 2008-2011 Apple Inc. 3ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 4ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston Permission is hereby granted, free of charge, to any person 5ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston obtaining a copy of this software and associated documentation files 6ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston (the "Software"), to deal in the Software without restriction, 7ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston including without limitation the rights to use, copy, modify, merge, 8ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston publish, distribute, sublicense, and/or sell copies of the Software, 9ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston and to permit persons to whom the Software is furnished to do so, 10ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston subject to the following conditions: 11ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 12ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston The above copyright notice and this permission notice shall be 13ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston included in all copies or substantial portions of the Software. 14ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 15ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 16ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 17ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 18ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston NONINFRINGEMENT. IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT 19ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 20ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 22ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston DEALINGS IN THE SOFTWARE. 23ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 24ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston Except as contained in this notice, the name(s) of the above 25ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston copyright holders shall not be used in advertising or otherwise to 26ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston promote the sale, use or other dealings in this Software without 27ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston prior written authorization. 28ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston*/ 29ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 30ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston/* 31ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * This file works with the glXMakeContextCurrent readable drawable. 32ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * 33ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * The way it works is by swapping the currentDrawable for the currentReadable 34ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * drawable if they are different. 35ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston */ 36ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston#include <stdbool.h> 37a1cb3babbef2af222b839a058694acc82a7074f1Jeremy Huddleston#include "glxclient.h" 38ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston#include "apple_glx_context.h" 39a1cb3babbef2af222b839a058694acc82a7074f1Jeremy Huddleston#include "apple_xgl_api.h" 405a459a036e33683410bab4df431ed553bd0eeb66Jon Turney#include "main/glheader.h" 417d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4Jeremy Huddleston#include "glapitable.h" 42ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 437d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4Jeremy Huddlestonextern struct _glapi_table * __ogl_framework_api; 44ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 45ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddlestonstruct apple_xgl_saved_state 46ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston{ 47ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston bool swapped; 48ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston}; 49ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 50ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddlestonstatic void 51ad503c41557606d15b0420c824369456f6d20a8fJeremy HuddlestonSetRead(struct apple_xgl_saved_state *saved) 52ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston{ 5322613d1670e3aafcfd3b95191b908a0adabe3eb9Jeremy Huddleston struct glx_context *gc = __glXGetCurrentContext(); 54ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 55ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston /* 56ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * By default indicate that the state was not swapped, so that UnsetRead 57ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * functions correctly. 58ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston */ 59ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston saved->swapped = false; 60ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 61ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston /* 62ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * If the readable drawable isn't the same as the drawable then 63ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * the user has requested a readable drawable with glXMakeContextCurrent(). 64ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * We emulate this behavior by switching the current drawable. 65ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston */ 66ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston if (None != gc->currentReadable 67ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston && gc->currentReadable != gc->currentDrawable) { 68ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston Display *dpy = glXGetCurrentDisplay(); 69ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 70ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston saved->swapped = true; 71ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 7280b280db883edc9550484dba03bd5c124b6a9bf9Jeremy Huddleston if (apple_glx_make_current_context(dpy, gc->driContext, gc->driContext, 73ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston gc->currentReadable)) { 74ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston /* An error occurred, so try to restore the old context state. */ 7580b280db883edc9550484dba03bd5c124b6a9bf9Jeremy Huddleston (void) apple_glx_make_current_context(dpy, gc->driContext, gc->driContext, 76ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston gc->currentDrawable); 77ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston saved->swapped = false; 78ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston } 79ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston } 80ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston} 81ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 82ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddlestonstatic void 83ad503c41557606d15b0420c824369456f6d20a8fJeremy HuddlestonUnsetRead(struct apple_xgl_saved_state *saved) 84ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston{ 85ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston if (saved->swapped) { 8622613d1670e3aafcfd3b95191b908a0adabe3eb9Jeremy Huddleston struct glx_context *gc = __glXGetCurrentContext(); 87ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston Display *dpy = glXGetCurrentDisplay(); 88ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 8980b280db883edc9550484dba03bd5c124b6a9bf9Jeremy Huddleston if (apple_glx_make_current_context(dpy, gc->driContext, gc->driContext, 90ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston gc->currentDrawable)) { 91ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston /* 92ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * An error occurred restoring the drawable. 93ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston * It's unclear what to do about that. 94ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston */ 95ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston } 96ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston } 97ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston} 98ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 99ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddlestonvoid 1007d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4Jeremy Huddleston__applegl_glReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, 101ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston GLenum format, GLenum type, void *pixels) 102ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston{ 103ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston struct apple_xgl_saved_state saved; 104ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 105ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston SetRead(&saved); 106ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 1077d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4Jeremy Huddleston __ogl_framework_api->ReadPixels(x, y, width, height, format, type, pixels); 108ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 109ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston UnsetRead(&saved); 110ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston} 111ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 112ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddlestonvoid 1137d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4Jeremy Huddleston__applegl_glCopyPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum type) 114ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston{ 115ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston struct apple_xgl_saved_state saved; 116ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 117ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston SetRead(&saved); 118ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 1197d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4Jeremy Huddleston __ogl_framework_api->CopyPixels(x, y, width, height, type); 120ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 121ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston UnsetRead(&saved); 122ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston} 123ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 124ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddlestonvoid 1257d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4Jeremy Huddleston__applegl_glCopyColorTable(GLenum target, GLenum internalformat, GLint x, GLint y, 126ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston GLsizei width) 127ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston{ 128ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston struct apple_xgl_saved_state saved; 129ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 130ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston SetRead(&saved); 131ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 1327d215e7c4d0ca8a18d91d4f30f79b97835a6d6c4Jeremy Huddleston __ogl_framework_api->CopyColorTable(target, internalformat, x, y, width); 133ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston 134ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston UnsetRead(&saved); 135ad503c41557606d15b0420c824369456f6d20a8fJeremy Huddleston} 136