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Diffstat (limited to 'libs/cairo-1.16.0/src/cairo-egl-context.c')
-rw-r--r--libs/cairo-1.16.0/src/cairo-egl-context.c317
1 files changed, 0 insertions, 317 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-egl-context.c b/libs/cairo-1.16.0/src/cairo-egl-context.c
deleted file mode 100644
index bf704c6..0000000
--- a/libs/cairo-1.16.0/src/cairo-egl-context.c
+++ /dev/null
@@ -1,317 +0,0 @@
-/* cairo - a vector graphics library with display and print output
- *
- * Copyright © 2009 Eric Anholt
- * Copyright © 2009 Chris Wilson
- * Copyright © 2005 Red Hat, Inc
- *
- * This library is free software; you can redistribute it and/or
- * modify it either under the terms of the GNU Lesser General Public
- * License version 2.1 as published by the Free Software Foundation
- * (the "LGPL") or, at your option, under the terms of the Mozilla
- * Public License Version 1.1 (the "MPL"). If you do not alter this
- * notice, a recipient may use your version of this file under either
- * the MPL or the LGPL.
- *
- * You should have received a copy of the LGPL along with this library
- * in the file COPYING-LGPL-2.1; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
- * You should have received a copy of the MPL along with this library
- * in the file COPYING-MPL-1.1
- *
- * The contents of this file are subject to the Mozilla Public License
- * Version 1.1 (the "License"); you may not use this file except in
- * compliance with the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
- * OF ANY KIND, either express or implied. See the LGPL or the MPL for
- * the specific language governing rights and limitations.
- *
- * The Original Code is the cairo graphics library.
- *
- * The Initial Developer of the Original Code is Red Hat, Inc.
- *
- * Contributor(s):
- * Carl Worth <cworth@cworth.org>
- * Chris Wilson <chris@chris-wilson.co.uk>
- */
-
-#include "cairoint.h"
-
-#include "cairo-gl-private.h"
-
-#include "cairo-error-private.h"
-
-typedef struct _cairo_egl_context {
- cairo_gl_context_t base;
-
- EGLDisplay display;
- EGLContext context;
-
- EGLSurface dummy_surface;
-
- EGLContext previous_context;
- EGLSurface previous_surface;
-} cairo_egl_context_t;
-
-typedef struct _cairo_egl_surface {
- cairo_gl_surface_t base;
-
- EGLSurface egl;
-} cairo_egl_surface_t;
-
-
-static cairo_bool_t
-_context_acquisition_changed_egl_state (cairo_egl_context_t *ctx,
- EGLSurface current_surface)
-{
- return ctx->previous_context != ctx->context ||
- ctx->previous_surface != current_surface;
-}
-
-static EGLSurface
-_egl_get_current_surface (cairo_egl_context_t *ctx)
-{
- if (ctx->base.current_target == NULL ||
- _cairo_gl_surface_is_texture (ctx->base.current_target)) {
- return ctx->dummy_surface;
- }
-
- return ((cairo_egl_surface_t *) ctx->base.current_target)->egl;
-}
-
-static void
-_egl_query_current_state (cairo_egl_context_t *ctx)
-{
- ctx->previous_surface = eglGetCurrentSurface (EGL_DRAW);
- ctx->previous_context = eglGetCurrentContext ();
-
- /* If any of the values were none, assume they are all none. Not all
- drivers seem well behaved when it comes to using these values across
- multiple threads. */
- if (ctx->previous_surface == EGL_NO_SURFACE ||
- ctx->previous_context == EGL_NO_CONTEXT) {
- ctx->previous_surface = EGL_NO_SURFACE;
- ctx->previous_context = EGL_NO_CONTEXT;
- }
-}
-
-static void
-_egl_acquire (void *abstract_ctx)
-{
- cairo_egl_context_t *ctx = abstract_ctx;
- EGLSurface current_surface = _egl_get_current_surface (ctx);
-
- _egl_query_current_state (ctx);
- if (!_context_acquisition_changed_egl_state (ctx, current_surface))
- return;
-
- eglMakeCurrent (ctx->display,
- current_surface, current_surface, ctx->context);
-}
-
-static void
-_egl_release (void *abstract_ctx)
-{
- cairo_egl_context_t *ctx = abstract_ctx;
- if (!ctx->base.thread_aware ||
- !_context_acquisition_changed_egl_state (ctx,
- _egl_get_current_surface (ctx))) {
- return;
- }
-
- eglMakeCurrent (ctx->display,
- EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
-}
-
-static void
-_egl_make_current (void *abstract_ctx,
- cairo_gl_surface_t *abstract_surface)
-{
- cairo_egl_context_t *ctx = abstract_ctx;
- cairo_egl_surface_t *surface = (cairo_egl_surface_t *) abstract_surface;
-
- eglMakeCurrent(ctx->display, surface->egl, surface->egl, ctx->context);
-}
-
-static void
-_egl_swap_buffers (void *abstract_ctx,
- cairo_gl_surface_t *abstract_surface)
-{
- cairo_egl_context_t *ctx = abstract_ctx;
- cairo_egl_surface_t *surface = (cairo_egl_surface_t *) abstract_surface;
-
- eglSwapBuffers (ctx->display, surface->egl);
-}
-
-static void
-_egl_destroy (void *abstract_ctx)
-{
- cairo_egl_context_t *ctx = abstract_ctx;
-
- eglMakeCurrent (ctx->display,
- EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
- if (ctx->dummy_surface != EGL_NO_SURFACE)
- eglDestroySurface (ctx->display, ctx->dummy_surface);
-}
-
-static cairo_bool_t
-_egl_make_current_surfaceless(cairo_egl_context_t *ctx)
-{
- const char *extensions;
-
- extensions = eglQueryString(ctx->display, EGL_EXTENSIONS);
- if (strstr(extensions, "EGL_KHR_surfaceless_context") == NULL &&
- strstr(extensions, "EGL_KHR_surfaceless_opengl") == NULL)
- return FALSE;
-
- if (!eglMakeCurrent(ctx->display,
- EGL_NO_SURFACE, EGL_NO_SURFACE, ctx->context))
- return FALSE;
-
- return TRUE;
-}
-
-cairo_device_t *
-cairo_egl_device_create (EGLDisplay dpy, EGLContext egl)
-{
- cairo_egl_context_t *ctx;
- cairo_status_t status;
- int attribs[] = {
- EGL_WIDTH, 1,
- EGL_HEIGHT, 1,
- EGL_NONE,
- };
- EGLConfig config;
- EGLint numConfigs;
-
- ctx = calloc (1, sizeof (cairo_egl_context_t));
- if (unlikely (ctx == NULL))
- return _cairo_gl_context_create_in_error (CAIRO_STATUS_NO_MEMORY);
-
- ctx->display = dpy;
- ctx->context = egl;
-
- ctx->base.acquire = _egl_acquire;
- ctx->base.release = _egl_release;
- ctx->base.make_current = _egl_make_current;
- ctx->base.swap_buffers = _egl_swap_buffers;
- ctx->base.destroy = _egl_destroy;
-
- /* We are about the change the current state of EGL, so we should
- * query the pre-existing surface now instead of later. */
- _egl_query_current_state (ctx);
-
- if (!_egl_make_current_surfaceless (ctx)) {
- /* Fall back to dummy surface, meh. */
- EGLint config_attribs[] = {
- EGL_CONFIG_ID, 0,
- EGL_NONE
- };
-
- /*
- * In order to be able to make an egl context current when using a
- * pbuffer surface, that surface must have been created with a config
- * that is compatible with the context config. For Mesa, this means
- * that the configs must be the same.
- */
- eglQueryContext (dpy, egl, EGL_CONFIG_ID, &config_attribs[1]);
- eglChooseConfig (dpy, config_attribs, &config, 1, &numConfigs);
-
- ctx->dummy_surface = eglCreatePbufferSurface (dpy, config, attribs);
- if (ctx->dummy_surface == NULL) {
- free (ctx);
- return _cairo_gl_context_create_in_error (CAIRO_STATUS_NO_MEMORY);
- }
-
- if (!eglMakeCurrent (dpy, ctx->dummy_surface, ctx->dummy_surface, egl)) {
- free (ctx);
- return _cairo_gl_context_create_in_error (CAIRO_STATUS_NO_MEMORY);
- }
- }
-
- status = _cairo_gl_dispatch_init (&ctx->base.dispatch, eglGetProcAddress);
- if (unlikely (status)) {
- free (ctx);
- return _cairo_gl_context_create_in_error (status);
- }
-
- status = _cairo_gl_context_init (&ctx->base);
- if (unlikely (status)) {
- if (ctx->dummy_surface != EGL_NO_SURFACE)
- eglDestroySurface (dpy, ctx->dummy_surface);
- free (ctx);
- return _cairo_gl_context_create_in_error (status);
- }
-
- /* Tune the default VBO size to reduce overhead on embedded devices.
- * This smaller size means that flushing needs to be done more often,
- * but it is less demanding of scarce memory on embedded devices.
- */
- ctx->base.vbo_size = 16*1024;
-
- eglMakeCurrent (dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
-
- return &ctx->base.base;
-}
-
-cairo_surface_t *
-cairo_gl_surface_create_for_egl (cairo_device_t *device,
- EGLSurface egl,
- int width,
- int height)
-{
- cairo_egl_surface_t *surface;
-
- if (unlikely (device->status))
- return _cairo_surface_create_in_error (device->status);
-
- if (device->backend->type != CAIRO_DEVICE_TYPE_GL)
- return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
-
- if (width <= 0 || height <= 0)
- return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
-
- surface = calloc (1, sizeof (cairo_egl_surface_t));
- if (unlikely (surface == NULL))
- return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
-
- _cairo_gl_surface_init (device, &surface->base,
- CAIRO_CONTENT_COLOR_ALPHA, width, height);
- surface->egl = egl;
-
- return &surface->base.base;
-}
-
-static cairo_bool_t is_egl_device (cairo_device_t *device)
-{
- return (device->backend != NULL &&
- device->backend->type == CAIRO_DEVICE_TYPE_GL);
-}
-
-static cairo_egl_context_t *to_egl_context (cairo_device_t *device)
-{
- return (cairo_egl_context_t *) device;
-}
-
-EGLDisplay
-cairo_egl_device_get_display (cairo_device_t *device)
-{
- if (! is_egl_device (device)) {
- _cairo_error_throw (CAIRO_STATUS_DEVICE_TYPE_MISMATCH);
- return EGL_NO_DISPLAY;
- }
-
- return to_egl_context (device)->display;
-}
-
-cairo_public EGLContext
-cairo_egl_device_get_context (cairo_device_t *device)
-{
- if (! is_egl_device (device)) {
- _cairo_error_throw (CAIRO_STATUS_DEVICE_TYPE_MISMATCH);
- return EGL_NO_CONTEXT;
- }
-
- return to_egl_context (device)->context;
-}
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