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df21e20f65
Although we use GLib internally in Cogl we would rather not leak GLib api through Cogl's own api, except through explicitly namespaced cogl_glib_ / cogl_gtype_ feature apis. One of the benefits we see to not leaking GLib through Cogl's public API is that documentation for Cogl won't need to first introduce the Glib API to newcomers, thus hopefully lowering the barrier to learning Cogl. This patch provides a Cogl specific typedef for reporting runtime errors which by no coincidence matches the typedef for GError exactly. If Cogl is built with --enable-glib (default) then developers can even safely assume that a CoglError is a GError under the hood. This patch also enforces a consistent policy for when NULL is passed as an error argument and an error is thrown. In this case we log the error and abort the application, instead of silently ignoring it. In common cases where nothing has been implemented to handle a particular error and/or where applications are just printing the error and aborting themselves then this saves some typing. This also seems more consistent with language based exceptions which usually cause a program to abort if they are not explicitly caught (which passing a non-NULL error signifies in this case) Since this policy for NULL error pointers is stricter than the standard GError convention, there is a clear note in the documentation to warn developers that are used to using the GError api. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit b068d5ea09ab32c37e8c965fc8582c85d1b2db46) Note: Since we can't change the Cogl 1.x api the patch was changed to not rename _error_quark() functions to be _error_domain() functions and although it's a bit ugly, instead of providing our own CoglError type that's compatible with GError we simply #define CoglError to GError unless Cogl is built with glib disabled. Note: this patch does technically introduce an API break since it drops the cogl_error_get_type() symbol generated by glib-mkenum (Since the CoglError enum was replaced by a CoglSystemError enum) but for now we are assuming that this will not affect anyone currently using the Cogl API. If this does turn out to be a problem in practice then we would be able to fix this my manually copying an implementation of cogl_error_get_type() generated by glib-mkenum into a compatibility source file and we could also define the original COGL_ERROR_ enums for compatibility too. Note: another minor concern with cherry-picking this patch to the 1.14 branch is that an api scanner would be lead to believe that some APIs have changed, and for example the gobject-introspection parser which understands the semantics of GError will not understand the semantics of CoglError. We expect most people that have tried to use gobject-introspection with Cogl already understand though that it is not well suited to generating bindings of the Cogl api anyway and we aren't aware or anyone depending on such bindings for apis involving GErrors. (GnomeShell only makes very-very minimal use of Cogl via the gjs bindings for the cogl_rectangle and cogl_color apis.) The main reason we have cherry-picked this patch to the 1.14 branch even given the above concerns is that without it it would become very awkward for us to cherry-pick other beneficial patches from master.
710 lines
24 KiB
C
710 lines
24 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-object.h"
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#include "cogl-internal.h"
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#include "cogl-private.h"
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#include "cogl-winsys-private.h"
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#include "winsys/cogl-winsys-stub-private.h"
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#include "cogl-profile.h"
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#include "cogl-util.h"
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#include "cogl-context-private.h"
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#include "cogl-display-private.h"
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#include "cogl-renderer-private.h"
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#include "cogl-journal-private.h"
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#include "cogl-texture-private.h"
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#include "cogl-texture-2d-private.h"
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#include "cogl-texture-3d-private.h"
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#include "cogl-texture-rectangle-private.h"
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#include "cogl-pipeline-private.h"
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#include "cogl-pipeline-opengl-private.h"
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#include "cogl-framebuffer-private.h"
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#include "cogl-onscreen-private.h"
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#include "cogl2-path.h"
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#include "cogl-attribute-private.h"
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#include "cogl1-context.h"
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#include "cogl-gpu-info-private.h"
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#include "cogl-config-private.h"
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#include "cogl-error-private.h"
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#include <string.h>
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#ifdef HAVE_COGL_GL
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#include "cogl-pipeline-fragend-arbfp-private.h"
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#endif
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/* This isn't defined in the GLES headers */
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#ifndef GL_POINT_SPRITE
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#define GL_POINT_SPRITE 0x8861
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#endif
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static void _cogl_context_free (CoglContext *context);
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COGL_OBJECT_DEFINE (Context, context);
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extern void
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_cogl_create_context_driver (CoglContext *context);
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static CoglContext *_cogl_context = NULL;
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static void
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_cogl_init_feature_overrides (CoglContext *ctx)
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{
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if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_VBOS)))
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ctx->private_feature_flags &= ~COGL_PRIVATE_FEATURE_VBOS;
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if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_PBOS)))
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ctx->private_feature_flags &= ~COGL_PRIVATE_FEATURE_PBOS;
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if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_ARBFP)))
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{
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ctx->feature_flags &= ~COGL_FEATURE_SHADERS_ARBFP;
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COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_ARBFP, FALSE);
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}
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if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_GLSL)))
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{
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ctx->feature_flags &= ~COGL_FEATURE_SHADERS_GLSL;
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COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_GLSL, FALSE);
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}
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if (G_UNLIKELY (COGL_DEBUG_ENABLED (COGL_DEBUG_DISABLE_NPOT_TEXTURES)))
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{
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ctx->feature_flags &= ~(COGL_FEATURE_TEXTURE_NPOT |
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COGL_FEATURE_TEXTURE_NPOT_BASIC |
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COGL_FEATURE_TEXTURE_NPOT_MIPMAP |
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COGL_FEATURE_TEXTURE_NPOT_REPEAT);
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COGL_FLAGS_SET (ctx->features, COGL_FEATURE_ID_TEXTURE_NPOT, FALSE);
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COGL_FLAGS_SET (ctx->features,
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COGL_FEATURE_ID_TEXTURE_NPOT_BASIC, FALSE);
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COGL_FLAGS_SET (ctx->features,
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COGL_FEATURE_ID_TEXTURE_NPOT_MIPMAP, FALSE);
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COGL_FLAGS_SET (ctx->features,
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COGL_FEATURE_ID_TEXTURE_NPOT_REPEAT, FALSE);
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}
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}
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const CoglWinsysVtable *
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_cogl_context_get_winsys (CoglContext *context)
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{
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return context->display->renderer->winsys_vtable;
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}
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/* For reference: There was some deliberation over whether to have a
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* constructor that could throw an exception but looking at standard
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* practices with several high level OO languages including python, C++,
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* C# Java and Ruby they all support exceptions in constructors and the
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* general consensus appears to be that throwing an exception is neater
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* than successfully constructing with an internal error status that
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* would then have to be explicitly checked via some form of ::is_ok()
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* method.
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*/
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CoglContext *
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cogl_context_new (CoglDisplay *display,
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CoglError **error)
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{
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CoglContext *context;
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GLubyte default_texture_data[] = { 0xff, 0xff, 0xff, 0x0 };
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CoglBitmap *default_texture_bitmap;
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const CoglWinsysVtable *winsys;
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int i;
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CoglError *internal_error = NULL;
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_cogl_init ();
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#ifdef COGL_ENABLE_PROFILE
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/* We need to be absolutely sure that uprof has been initialized
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* before calling _cogl_uprof_init. uprof_init (NULL, NULL)
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* will be a NOP if it has been initialized but it will also
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* mean subsequent parsing of the UProf GOptionGroup will have no
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* affect.
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*
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* Sadly GOptionGroup based library initialization is extremely
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* fragile by design because GOptionGroups have no notion of
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* dependencies and so the order things are initialized isn't
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* currently under tight control.
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*/
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uprof_init (NULL, NULL);
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_cogl_uprof_init ();
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#endif
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/* Allocate context memory */
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context = g_malloc0 (sizeof (CoglContext));
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/* Convert the context into an object immediately in case any of the
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code below wants to verify that the context pointer is a valid
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object */
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_cogl_context_object_new (context);
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/* XXX: Gross hack!
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* Currently everything in Cogl just assumes there is a default
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* context which it can access via _COGL_GET_CONTEXT() including
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* code used to construct a CoglContext. Until all of that code
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* has been updated to take an explicit context argument we have
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* to immediately make our pointer the default context.
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*/
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_cogl_context = context;
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/* Init default values */
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memset (context->features, 0, sizeof (context->features));
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context->feature_flags = 0;
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context->private_feature_flags = 0;
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context->texture_types = NULL;
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context->buffer_types = NULL;
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context->rectangle_state = COGL_WINSYS_RECTANGLE_STATE_UNKNOWN;
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memset (context->winsys_features, 0, sizeof (context->winsys_features));
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if (!display)
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{
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CoglRenderer *renderer = cogl_renderer_new ();
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if (!cogl_renderer_connect (renderer, error))
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{
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g_free (context);
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return NULL;
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}
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display = cogl_display_new (renderer, NULL);
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}
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else
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cogl_object_ref (display);
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if (!cogl_display_setup (display, error))
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{
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cogl_object_unref (display);
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g_free (context);
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return NULL;
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}
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context->display = display;
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/* This is duplicated data, but it's much more convenient to have
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the driver attached to the context and the value is accessed a
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lot throughout Cogl */
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context->driver = display->renderer->driver;
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/* Again this is duplicated data, but it convenient to be able
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* access these from the context. */
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context->driver_vtable = display->renderer->driver_vtable;
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context->texture_driver = display->renderer->texture_driver;
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winsys = _cogl_context_get_winsys (context);
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if (!winsys->context_init (context, error))
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{
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cogl_object_unref (display);
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g_free (context);
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return NULL;
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}
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context->attribute_name_states_hash =
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g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
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context->attribute_name_index_map = NULL;
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context->n_attribute_names = 0;
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/* The "cogl_color_in" attribute needs a deterministic name_index
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* so we make sure it's the first attribute name we register */
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_cogl_attribute_register_attribute_name (context, "cogl_color_in");
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context->uniform_names =
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g_ptr_array_new_with_free_func ((GDestroyNotify) g_free);
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context->uniform_name_hash = g_hash_table_new (g_str_hash, g_str_equal);
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context->n_uniform_names = 0;
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/* Initialise the driver specific state */
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_cogl_init_feature_overrides (context);
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context->sampler_cache = _cogl_sampler_cache_new (context);
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_cogl_pipeline_init_default_pipeline ();
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_cogl_pipeline_init_default_layers ();
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_cogl_pipeline_init_state_hash_functions ();
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_cogl_pipeline_init_layer_state_hash_functions ();
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context->current_clip_stack_valid = FALSE;
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context->current_clip_stack = NULL;
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context->legacy_backface_culling_enabled = FALSE;
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cogl_matrix_init_identity (&context->identity_matrix);
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cogl_matrix_init_identity (&context->y_flip_matrix);
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cogl_matrix_scale (&context->y_flip_matrix, 1, -1, 1);
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context->flushed_matrix_mode = COGL_MATRIX_MODELVIEW;
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context->texture_units =
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g_array_new (FALSE, FALSE, sizeof (CoglTextureUnit));
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/* See cogl-pipeline.c for more details about why we leave texture unit 1
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* active by default... */
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context->active_texture_unit = 1;
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GE (context, glActiveTexture (GL_TEXTURE1));
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context->legacy_fog_state.enabled = FALSE;
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context->opaque_color_pipeline = cogl_pipeline_new (context);
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context->blended_color_pipeline = cogl_pipeline_new (context);
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context->texture_pipeline = cogl_pipeline_new (context);
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context->codegen_header_buffer = g_string_new ("");
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context->codegen_source_buffer = g_string_new ("");
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context->source_stack = NULL;
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context->legacy_state_set = 0;
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context->default_gl_texture_2d_tex = NULL;
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context->default_gl_texture_3d_tex = NULL;
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context->default_gl_texture_rect_tex = NULL;
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context->framebuffers = NULL;
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context->current_draw_buffer = NULL;
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context->current_read_buffer = NULL;
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context->current_draw_buffer_state_flushed = 0;
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context->current_draw_buffer_changes = COGL_FRAMEBUFFER_STATE_ALL;
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g_queue_init (&context->gles2_context_stack);
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context->journal_flush_attributes_array =
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g_array_new (TRUE, FALSE, sizeof (CoglAttribute *));
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context->journal_clip_bounds = NULL;
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context->polygon_vertices = g_array_new (FALSE, FALSE, sizeof (float));
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context->current_pipeline = NULL;
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context->current_pipeline_changes_since_flush = 0;
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context->current_pipeline_skip_gl_color = FALSE;
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_cogl_bitmask_init (&context->enabled_builtin_attributes);
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_cogl_bitmask_init (&context->enable_builtin_attributes_tmp);
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_cogl_bitmask_init (&context->enabled_texcoord_attributes);
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_cogl_bitmask_init (&context->enable_texcoord_attributes_tmp);
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_cogl_bitmask_init (&context->enabled_custom_attributes);
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_cogl_bitmask_init (&context->enable_custom_attributes_tmp);
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_cogl_bitmask_init (&context->changed_bits_tmp);
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context->max_texture_units = -1;
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context->max_activateable_texture_units = -1;
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context->current_fragment_program_type = COGL_PIPELINE_PROGRAM_TYPE_FIXED;
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context->current_vertex_program_type = COGL_PIPELINE_PROGRAM_TYPE_FIXED;
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context->current_gl_program = 0;
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context->current_gl_dither_enabled = TRUE;
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context->current_gl_color_mask = COGL_COLOR_MASK_ALL;
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context->gl_blend_enable_cache = FALSE;
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context->depth_test_enabled_cache = FALSE;
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context->depth_test_function_cache = COGL_DEPTH_TEST_FUNCTION_LESS;
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context->depth_writing_enabled_cache = TRUE;
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context->depth_range_near_cache = 0;
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context->depth_range_far_cache = 1;
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context->legacy_depth_test_enabled = FALSE;
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context->pipeline_cache = cogl_pipeline_cache_new ();
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for (i = 0; i < COGL_BUFFER_BIND_TARGET_COUNT; i++)
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context->current_buffer[i] = NULL;
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context->window_buffer = NULL;
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context->framebuffer_stack = _cogl_create_framebuffer_stack ();
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/* XXX: In this case the Clutter backend is still responsible for
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* the OpenGL binding API and for creating onscreen framebuffers and
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* so we have to add a dummy framebuffer to represent the backend
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* owned window... */
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if (_cogl_context_get_winsys (context) == _cogl_winsys_stub_get_vtable ())
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{
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CoglOnscreen *window = _cogl_onscreen_new ();
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cogl_set_framebuffer (COGL_FRAMEBUFFER (window));
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cogl_object_unref (COGL_FRAMEBUFFER (window));
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}
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context->current_path = cogl2_path_new ();
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context->stencil_pipeline = cogl_pipeline_new (context);
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context->in_begin_gl_block = FALSE;
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context->quad_buffer_indices_byte = NULL;
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context->quad_buffer_indices = NULL;
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context->quad_buffer_indices_len = 0;
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context->rectangle_byte_indices = NULL;
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context->rectangle_short_indices = NULL;
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context->rectangle_short_indices_len = 0;
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context->texture_download_pipeline = NULL;
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context->blit_texture_pipeline = NULL;
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#if defined (HAVE_COGL_GL) || defined (HAVE_COGL_GLES)
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if (context->driver != COGL_DRIVER_GLES2)
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/* The default for GL_ALPHA_TEST is to always pass which is equivalent to
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* the test being disabled therefore we assume that for all drivers there
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* will be no performance impact if we always leave the test enabled which
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* makes things a bit simpler for us. Under GLES2 the alpha test is
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* implemented in the fragment shader so there is no enable for it
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*/
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GE (context, glEnable (GL_ALPHA_TEST));
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#endif
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context->current_modelview_entry = NULL;
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context->current_projection_entry = NULL;
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_cogl_matrix_entry_identity_init (&context->identity_entry);
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_cogl_matrix_entry_cache_init (&context->builtin_flushed_projection);
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_cogl_matrix_entry_cache_init (&context->builtin_flushed_modelview);
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default_texture_bitmap =
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cogl_bitmap_new_for_data (context,
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1, 1, /* width/height */
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COGL_PIXEL_FORMAT_RGBA_8888_PRE,
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4, /* rowstride */
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default_texture_data);
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/* Create default textures used for fall backs */
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context->default_gl_texture_2d_tex =
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cogl_texture_2d_new_from_bitmap (default_texture_bitmap,
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/* internal format */
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COGL_PIXEL_FORMAT_RGBA_8888_PRE,
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NULL);
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/* If 3D or rectangle textures aren't supported then these will
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* return errors that we can simply ignore. */
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internal_error = NULL;
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context->default_gl_texture_3d_tex =
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cogl_texture_3d_new_from_bitmap (default_texture_bitmap,
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1, /* height */
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1, /* depth */
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COGL_PIXEL_FORMAT_RGBA_8888_PRE,
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&internal_error);
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if (internal_error)
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cogl_error_free (internal_error);
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internal_error = NULL;
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context->default_gl_texture_rect_tex =
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cogl_texture_rectangle_new_from_bitmap (default_texture_bitmap,
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COGL_PIXEL_FORMAT_RGBA_8888_PRE,
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&internal_error);
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if (internal_error)
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cogl_error_free (internal_error);
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cogl_object_unref (default_texture_bitmap);
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cogl_push_source (context->opaque_color_pipeline);
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context->atlases = NULL;
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g_hook_list_init (&context->atlas_reorganize_callbacks, sizeof (GHook));
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context->buffer_map_fallback_array = g_byte_array_new ();
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context->buffer_map_fallback_in_use = FALSE;
|
|
|
|
/* As far as I can tell, GL_POINT_SPRITE doesn't have any effect
|
|
unless GL_COORD_REPLACE is enabled for an individual
|
|
layer. Therefore it seems like it should be ok to just leave it
|
|
enabled all the time instead of having to have a set property on
|
|
each pipeline to track whether any layers have point sprite
|
|
coords enabled. We don't need to do this for GLES2 because point
|
|
sprites are handled using a builtin varying in the shader. */
|
|
if (context->driver != COGL_DRIVER_GLES2 &&
|
|
cogl_has_feature (context, COGL_FEATURE_ID_POINT_SPRITE))
|
|
GE (context, glEnable (GL_POINT_SPRITE));
|
|
|
|
return context;
|
|
}
|
|
|
|
static void
|
|
_cogl_context_free (CoglContext *context)
|
|
{
|
|
const CoglWinsysVtable *winsys = _cogl_context_get_winsys (context);
|
|
|
|
winsys->context_deinit (context);
|
|
|
|
_cogl_free_framebuffer_stack (context->framebuffer_stack);
|
|
|
|
if (context->current_path)
|
|
cogl_handle_unref (context->current_path);
|
|
|
|
if (context->default_gl_texture_2d_tex)
|
|
cogl_object_unref (context->default_gl_texture_2d_tex);
|
|
if (context->default_gl_texture_3d_tex)
|
|
cogl_object_unref (context->default_gl_texture_3d_tex);
|
|
if (context->default_gl_texture_rect_tex)
|
|
cogl_object_unref (context->default_gl_texture_rect_tex);
|
|
|
|
if (context->opaque_color_pipeline)
|
|
cogl_object_unref (context->opaque_color_pipeline);
|
|
if (context->blended_color_pipeline)
|
|
cogl_object_unref (context->blended_color_pipeline);
|
|
if (context->texture_pipeline)
|
|
cogl_object_unref (context->texture_pipeline);
|
|
|
|
if (context->blit_texture_pipeline)
|
|
cogl_object_unref (context->blit_texture_pipeline);
|
|
|
|
g_warn_if_fail (context->gles2_context_stack.length == 0);
|
|
|
|
if (context->journal_flush_attributes_array)
|
|
g_array_free (context->journal_flush_attributes_array, TRUE);
|
|
if (context->journal_clip_bounds)
|
|
g_array_free (context->journal_clip_bounds, TRUE);
|
|
|
|
if (context->polygon_vertices)
|
|
g_array_free (context->polygon_vertices, TRUE);
|
|
|
|
if (context->quad_buffer_indices_byte)
|
|
cogl_object_unref (context->quad_buffer_indices_byte);
|
|
if (context->quad_buffer_indices)
|
|
cogl_object_unref (context->quad_buffer_indices);
|
|
|
|
if (context->rectangle_byte_indices)
|
|
cogl_object_unref (context->rectangle_byte_indices);
|
|
if (context->rectangle_short_indices)
|
|
cogl_object_unref (context->rectangle_short_indices);
|
|
|
|
if (context->default_pipeline)
|
|
cogl_object_unref (context->default_pipeline);
|
|
|
|
if (context->dummy_layer_dependant)
|
|
cogl_object_unref (context->dummy_layer_dependant);
|
|
if (context->default_layer_n)
|
|
cogl_object_unref (context->default_layer_n);
|
|
if (context->default_layer_0)
|
|
cogl_object_unref (context->default_layer_0);
|
|
|
|
if (context->current_clip_stack_valid)
|
|
_cogl_clip_stack_unref (context->current_clip_stack);
|
|
|
|
g_slist_free (context->atlases);
|
|
g_hook_list_clear (&context->atlas_reorganize_callbacks);
|
|
|
|
_cogl_bitmask_destroy (&context->enabled_builtin_attributes);
|
|
_cogl_bitmask_destroy (&context->enable_builtin_attributes_tmp);
|
|
_cogl_bitmask_destroy (&context->enabled_texcoord_attributes);
|
|
_cogl_bitmask_destroy (&context->enable_texcoord_attributes_tmp);
|
|
_cogl_bitmask_destroy (&context->enabled_custom_attributes);
|
|
_cogl_bitmask_destroy (&context->enable_custom_attributes_tmp);
|
|
_cogl_bitmask_destroy (&context->changed_bits_tmp);
|
|
|
|
g_slist_free (context->texture_types);
|
|
g_slist_free (context->buffer_types);
|
|
|
|
if (context->current_modelview_entry)
|
|
_cogl_matrix_entry_unref (context->current_modelview_entry);
|
|
if (context->current_projection_entry)
|
|
_cogl_matrix_entry_unref (context->current_projection_entry);
|
|
_cogl_matrix_entry_cache_destroy (&context->builtin_flushed_projection);
|
|
_cogl_matrix_entry_cache_destroy (&context->builtin_flushed_modelview);
|
|
|
|
cogl_pipeline_cache_free (context->pipeline_cache);
|
|
|
|
_cogl_sampler_cache_free (context->sampler_cache);
|
|
|
|
_cogl_destroy_texture_units ();
|
|
|
|
g_ptr_array_free (context->uniform_names, TRUE);
|
|
g_hash_table_destroy (context->uniform_name_hash);
|
|
|
|
g_hash_table_destroy (context->attribute_name_states_hash);
|
|
g_array_free (context->attribute_name_index_map, TRUE);
|
|
|
|
g_byte_array_free (context->buffer_map_fallback_array, TRUE);
|
|
|
|
cogl_object_unref (context->display);
|
|
|
|
g_free (context);
|
|
}
|
|
|
|
CoglContext *
|
|
_cogl_context_get_default (void)
|
|
{
|
|
CoglError *error = NULL;
|
|
/* Create if doesn't exist yet */
|
|
if (_cogl_context == NULL)
|
|
{
|
|
_cogl_context = cogl_context_new (NULL, &error);
|
|
if (!_cogl_context)
|
|
{
|
|
g_warning ("Failed to create default context: %s",
|
|
error->message);
|
|
cogl_error_free (error);
|
|
}
|
|
}
|
|
|
|
return _cogl_context;
|
|
}
|
|
|
|
CoglDisplay *
|
|
cogl_context_get_display (CoglContext *context)
|
|
{
|
|
return context->display;
|
|
}
|
|
|
|
#ifdef COGL_HAS_EGL_SUPPORT
|
|
EGLDisplay
|
|
cogl_egl_context_get_egl_display (CoglContext *context)
|
|
{
|
|
const CoglWinsysVtable *winsys = _cogl_context_get_winsys (context);
|
|
|
|
/* This should only be called for EGL contexts */
|
|
_COGL_RETURN_VAL_IF_FAIL (winsys->context_egl_get_egl_display != NULL, NULL);
|
|
|
|
return winsys->context_egl_get_egl_display (context);
|
|
}
|
|
#endif
|
|
|
|
CoglBool
|
|
_cogl_context_update_features (CoglContext *context,
|
|
CoglError **error)
|
|
{
|
|
return context->driver_vtable->update_features (context, error);
|
|
}
|
|
|
|
void
|
|
_cogl_context_set_current_projection_entry (CoglContext *context,
|
|
CoglMatrixEntry *entry)
|
|
{
|
|
_cogl_matrix_entry_ref (entry);
|
|
if (context->current_projection_entry)
|
|
_cogl_matrix_entry_unref (context->current_projection_entry);
|
|
context->current_projection_entry = entry;
|
|
}
|
|
|
|
void
|
|
_cogl_context_set_current_modelview_entry (CoglContext *context,
|
|
CoglMatrixEntry *entry)
|
|
{
|
|
_cogl_matrix_entry_ref (entry);
|
|
if (context->current_modelview_entry)
|
|
_cogl_matrix_entry_unref (context->current_modelview_entry);
|
|
context->current_modelview_entry = entry;
|
|
}
|
|
|
|
const char *
|
|
_cogl_context_get_gl_extensions (CoglContext *context)
|
|
{
|
|
const char *env_disabled_extensions;
|
|
|
|
if ((env_disabled_extensions = g_getenv ("COGL_DISABLE_GL_EXTENSIONS"))
|
|
|| _cogl_config_disable_gl_extensions)
|
|
{
|
|
static CoglUserDataKey extensions_key;
|
|
const char *enabled_extensions;
|
|
char **split_enabled_extensions;
|
|
char **split_env_disabled_extensions;
|
|
char **split_conf_disabled_extensions;
|
|
char **e;
|
|
GString *result;
|
|
|
|
/* We need to return a const string so we'll attach the results
|
|
* to the CoglContext to avoid leaking the generated string.
|
|
* This string is only used rarely so we are using
|
|
* cogl_object_set_user_data instead of adding an explicit
|
|
* member to CoglContext to avoid making the struct bigger */
|
|
|
|
enabled_extensions =
|
|
cogl_object_get_user_data (COGL_OBJECT (context), &extensions_key);
|
|
if (enabled_extensions)
|
|
return enabled_extensions;
|
|
|
|
enabled_extensions = (const char *) context->glGetString (GL_EXTENSIONS);
|
|
|
|
split_enabled_extensions = g_strsplit (enabled_extensions,
|
|
" ",
|
|
0 /* no max tokens */);
|
|
|
|
if (env_disabled_extensions)
|
|
split_env_disabled_extensions =
|
|
g_strsplit (env_disabled_extensions,
|
|
",",
|
|
0 /* no max tokens */);
|
|
else
|
|
split_env_disabled_extensions = NULL;
|
|
|
|
if (_cogl_config_disable_gl_extensions)
|
|
split_conf_disabled_extensions =
|
|
g_strsplit (_cogl_config_disable_gl_extensions,
|
|
",",
|
|
0 /* no max tokens */);
|
|
else
|
|
split_conf_disabled_extensions = NULL;
|
|
|
|
result = g_string_new (NULL);
|
|
|
|
for (e = split_enabled_extensions; *e; e++)
|
|
{
|
|
char **d;
|
|
|
|
if (split_env_disabled_extensions)
|
|
for (d = split_env_disabled_extensions; *d; d++)
|
|
if (!strcmp (*e, *d))
|
|
goto disabled;
|
|
if (split_conf_disabled_extensions)
|
|
for (d = split_conf_disabled_extensions; *d; d++)
|
|
if (!strcmp (*e, *d))
|
|
goto disabled;
|
|
|
|
if (result->len > 0)
|
|
g_string_append_c (result, ' ');
|
|
g_string_append (result, *e);
|
|
|
|
disabled:
|
|
continue;
|
|
}
|
|
|
|
enabled_extensions = g_string_free (result, FALSE);
|
|
|
|
g_strfreev (split_enabled_extensions);
|
|
if (split_env_disabled_extensions)
|
|
g_strfreev (split_env_disabled_extensions);
|
|
if (split_conf_disabled_extensions)
|
|
g_strfreev (split_conf_disabled_extensions);
|
|
|
|
cogl_object_set_user_data (COGL_OBJECT (context),
|
|
&extensions_key,
|
|
(void *) enabled_extensions,
|
|
(CoglUserDataDestroyCallback) g_free);
|
|
|
|
return enabled_extensions;
|
|
}
|
|
else
|
|
return (const char *) context->glGetString (GL_EXTENSIONS);
|
|
}
|
|
|
|
const char *
|
|
_cogl_context_get_gl_version (CoglContext *context)
|
|
{
|
|
const char *version_override;
|
|
|
|
if ((version_override = g_getenv ("COGL_OVERRIDE_GL_VERSION")))
|
|
return version_override;
|
|
else if (_cogl_config_override_gl_version)
|
|
return _cogl_config_override_gl_version;
|
|
else
|
|
return (const char *) context->glGetString (GL_VERSION);
|
|
}
|