mutter/cogl/deprecated/cogl-framebuffer-deprecated.c
Robert Bragg a0441778ad This re-licenses Cogl 1.18 under the MIT license
Since the Cogl 1.18 branch is actively maintained in parallel with the
master branch; this is a counter part to commit 1b83ef938fc16b which
re-licensed the master branch to use the MIT license.

This re-licensing is a follow up to the proposal that was sent to the
Cogl mailing list:
http://lists.freedesktop.org/archives/cogl/2013-December/001465.html

Note: there was a copyright assignment policy in place for Clutter (and
therefore Cogl which was part of Clutter at the time) until the 11th of
June 2010 and so we only checked the details after that point (commit
0bbf50f905)

For each file, authors were identified via this Git command:
$ git blame -p -C -C -C20 -M -M10  0bbf50f905..HEAD

We received blanket approvals for re-licensing all Red Hat and Collabora
contributions which reduced how many people needed to be contacted
individually:
- http://lists.freedesktop.org/archives/cogl/2013-December/001470.html
- http://lists.freedesktop.org/archives/cogl/2014-January/001536.html

Individual approval requests were sent to all the other identified authors
who all confirmed the re-license on the Cogl mailinglist:
http://lists.freedesktop.org/archives/cogl/2014-January

As well as updating the copyright header in all sources files, the
COPYING file has been updated to reflect the license change and also
document the other licenses used in Cogl such as the SGI Free Software
License B, version 2.0 and the 3-clause BSD license.

This patch was not simply cherry-picked from master; but the same
methodology was used to check the source files.
2014-02-22 02:02:53 +00:00

296 lines
8.3 KiB
C

/*
* Cogl
*
* A Low Level GPU Graphics and Utilities API
*
* Copyright (C) 2014 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*
*/
#include <config.h>
#include "cogl-types.h"
#include "cogl-context-private.h"
#include "cogl-framebuffer-private.h"
#include "cogl-framebuffer-deprecated.h"
typedef struct _CoglFramebufferStackEntry
{
CoglFramebuffer *draw_buffer;
CoglFramebuffer *read_buffer;
} CoglFramebufferStackEntry;
static CoglFramebufferStackEntry *
create_stack_entry (CoglFramebuffer *draw_buffer,
CoglFramebuffer *read_buffer)
{
CoglFramebufferStackEntry *entry = g_slice_new (CoglFramebufferStackEntry);
entry->draw_buffer = draw_buffer;
entry->read_buffer = read_buffer;
return entry;
}
GSList *
_cogl_create_framebuffer_stack (void)
{
CoglFramebufferStackEntry *entry;
GSList *stack = NULL;
entry = create_stack_entry (NULL, NULL);
return g_slist_prepend (stack, entry);
}
void
_cogl_free_framebuffer_stack (GSList *stack)
{
GSList *l;
for (l = stack; l != NULL; l = l->next)
{
CoglFramebufferStackEntry *entry = l->data;
if (entry->draw_buffer)
cogl_object_unref (entry->draw_buffer);
if (entry->read_buffer)
cogl_object_unref (entry->draw_buffer);
g_slice_free (CoglFramebufferStackEntry, entry);
}
g_slist_free (stack);
}
static void
notify_buffers_changed (CoglFramebuffer *old_draw_buffer,
CoglFramebuffer *new_draw_buffer,
CoglFramebuffer *old_read_buffer,
CoglFramebuffer *new_read_buffer)
{
/* XXX: To support the deprecated cogl_set_draw_buffer API we keep
* track of the last onscreen framebuffer that was set so that it
* can be restored if the COGL_WINDOW_BUFFER enum is used. A
* reference isn't taken to the framebuffer because otherwise we
* would have a circular reference between the context and the
* framebuffer. Instead the pointer is set to NULL in
* _cogl_onscreen_free as a kind of a cheap weak reference */
if (new_draw_buffer &&
new_draw_buffer->type == COGL_FRAMEBUFFER_TYPE_ONSCREEN)
new_draw_buffer->context->window_buffer = new_draw_buffer;
}
/* Set the current framebuffer without checking if it's already the
* current framebuffer. This is used by cogl_pop_framebuffer while
* the top of the stack is currently not up to date. */
static void
_cogl_set_framebuffers_real (CoglFramebuffer *draw_buffer,
CoglFramebuffer *read_buffer)
{
CoglFramebufferStackEntry *entry;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_COGL_RETURN_IF_FAIL (ctx != NULL);
_COGL_RETURN_IF_FAIL (draw_buffer && read_buffer ?
draw_buffer->context == read_buffer->context : TRUE);
entry = ctx->framebuffer_stack->data;
notify_buffers_changed (entry->draw_buffer,
draw_buffer,
entry->read_buffer,
read_buffer);
if (draw_buffer)
cogl_object_ref (draw_buffer);
if (entry->draw_buffer)
cogl_object_unref (entry->draw_buffer);
if (read_buffer)
cogl_object_ref (read_buffer);
if (entry->read_buffer)
cogl_object_unref (entry->read_buffer);
entry->draw_buffer = draw_buffer;
entry->read_buffer = read_buffer;
}
static void
_cogl_set_framebuffers (CoglFramebuffer *draw_buffer,
CoglFramebuffer *read_buffer)
{
CoglFramebuffer *current_draw_buffer;
CoglFramebuffer *current_read_buffer;
_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (draw_buffer));
_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (read_buffer));
current_draw_buffer = cogl_get_draw_framebuffer ();
current_read_buffer = _cogl_get_read_framebuffer ();
if (current_draw_buffer != draw_buffer ||
current_read_buffer != read_buffer)
_cogl_set_framebuffers_real (draw_buffer, read_buffer);
}
void
cogl_set_framebuffer (CoglFramebuffer *framebuffer)
{
_cogl_set_framebuffers (framebuffer, framebuffer);
}
/* XXX: deprecated API */
void
cogl_set_draw_buffer (CoglBufferTarget target, CoglHandle handle)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if (target == COGL_WINDOW_BUFFER)
handle = ctx->window_buffer;
/* This is deprecated public API. The public API doesn't currently
really expose the concept of separate draw and read buffers so
for the time being this actually just sets both buffers */
cogl_set_framebuffer (handle);
}
CoglFramebuffer *
cogl_get_draw_framebuffer (void)
{
CoglFramebufferStackEntry *entry;
_COGL_GET_CONTEXT (ctx, NULL);
g_assert (ctx->framebuffer_stack);
entry = ctx->framebuffer_stack->data;
return entry->draw_buffer;
}
CoglFramebuffer *
_cogl_get_read_framebuffer (void)
{
CoglFramebufferStackEntry *entry;
_COGL_GET_CONTEXT (ctx, NULL);
g_assert (ctx->framebuffer_stack);
entry = ctx->framebuffer_stack->data;
return entry->read_buffer;
}
void
_cogl_push_framebuffers (CoglFramebuffer *draw_buffer,
CoglFramebuffer *read_buffer)
{
CoglContext *ctx;
CoglFramebuffer *old_draw_buffer, *old_read_buffer;
_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (draw_buffer));
_COGL_RETURN_IF_FAIL (cogl_is_framebuffer (read_buffer));
ctx = draw_buffer->context;
_COGL_RETURN_IF_FAIL (ctx != NULL);
_COGL_RETURN_IF_FAIL (draw_buffer->context == read_buffer->context);
_COGL_RETURN_IF_FAIL (ctx->framebuffer_stack != NULL);
/* Copy the top of the stack so that when we call cogl_set_framebuffer
it will still know what the old framebuffer was */
old_draw_buffer = cogl_get_draw_framebuffer ();
if (old_draw_buffer)
cogl_object_ref (old_draw_buffer);
old_read_buffer = _cogl_get_read_framebuffer ();
if (old_read_buffer)
cogl_object_ref (old_read_buffer);
ctx->framebuffer_stack =
g_slist_prepend (ctx->framebuffer_stack,
create_stack_entry (old_draw_buffer,
old_read_buffer));
_cogl_set_framebuffers (draw_buffer, read_buffer);
}
void
cogl_push_framebuffer (CoglFramebuffer *buffer)
{
_cogl_push_framebuffers (buffer, buffer);
}
/* XXX: deprecated API */
void
cogl_push_draw_buffer (void)
{
cogl_push_framebuffer (cogl_get_draw_framebuffer ());
}
void
cogl_pop_framebuffer (void)
{
CoglFramebufferStackEntry *to_pop;
CoglFramebufferStackEntry *to_restore;
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
g_assert (ctx->framebuffer_stack != NULL);
g_assert (ctx->framebuffer_stack->next != NULL);
to_pop = ctx->framebuffer_stack->data;
to_restore = ctx->framebuffer_stack->next->data;
if (to_pop->draw_buffer != to_restore->draw_buffer ||
to_pop->read_buffer != to_restore->read_buffer)
notify_buffers_changed (to_pop->draw_buffer,
to_restore->draw_buffer,
to_pop->read_buffer,
to_restore->read_buffer);
cogl_object_unref (to_pop->draw_buffer);
cogl_object_unref (to_pop->read_buffer);
g_slice_free (CoglFramebufferStackEntry, to_pop);
ctx->framebuffer_stack =
g_slist_delete_link (ctx->framebuffer_stack,
ctx->framebuffer_stack);
}
/* XXX: deprecated API */
void
cogl_pop_draw_buffer (void)
{
cogl_pop_framebuffer ();
}
CoglPixelFormat
cogl_framebuffer_get_color_format (CoglFramebuffer *framebuffer)
{
return framebuffer->internal_format;
}