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b72f255c0a
Since we've had several developers from admirable projects say they would like to use Cogl but would really prefer not to pull in gobject,gmodule and glib as extra dependencies we are investigating if we can get to the point where glib is only an optional dependency. Actually we feel like we only make minimal use of glib anyway, so it may well be quite straightforward to achieve this. This adds a --disable-glib configure option that can be used to disable features that depend on glib. Actually --disable-glib doesn't strictly disable glib at this point because it's more helpful if cogl continues to build as we make incremental progress towards this. The first use of glib that this patch tackles is the use of g_return_val_if_fail and g_return_if_fail which have been replaced with equivalent _COGL_RETURN_VAL_IF_FAIL and _COGL_RETURN_IF_FAIL macros. Reviewed-by: Neil Roberts <neil@linux.intel.com>
284 lines
7.3 KiB
C
284 lines
7.3 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) 2007,2008,2009,2010 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 <string.h>
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#include <math.h>
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#include <glib.h>
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#include "cogl.h"
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#include "cogl-clip-stack.h"
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#include "cogl-clip-state-private.h"
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#include "cogl-context-private.h"
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#include "cogl-internal.h"
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#include "cogl-framebuffer-private.h"
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#include "cogl-journal-private.h"
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#include "cogl-util.h"
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#include "cogl-matrix-private.h"
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void
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cogl_clip_push_window_rectangle (int x_offset,
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int y_offset,
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int width,
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int height)
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{
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CoglFramebuffer *framebuffer;
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CoglClipState *clip_state;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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framebuffer = cogl_get_draw_framebuffer ();
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clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
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clip_state->stacks->data =
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_cogl_clip_stack_push_window_rectangle (clip_state->stacks->data,
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x_offset, y_offset,
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width, height);
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}
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/* XXX: This is deprecated API */
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void
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cogl_clip_push_window_rect (float x_offset,
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float y_offset,
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float width,
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float height)
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{
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cogl_clip_push_window_rectangle (x_offset, y_offset, width, height);
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}
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void
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cogl_clip_push_rectangle (float x_1,
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float y_1,
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float x_2,
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float y_2)
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{
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CoglFramebuffer *framebuffer;
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CoglClipState *clip_state;
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CoglMatrix modelview_matrix;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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framebuffer = cogl_get_draw_framebuffer ();
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clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
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cogl_get_modelview_matrix (&modelview_matrix);
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clip_state->stacks->data =
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_cogl_clip_stack_push_rectangle (clip_state->stacks->data,
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x_1, y_1, x_2, y_2,
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&modelview_matrix);
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}
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/* XXX: Deprecated API */
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void
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cogl_clip_push (float x_offset,
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float y_offset,
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float width,
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float height)
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{
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cogl_clip_push_rectangle (x_offset,
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y_offset,
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x_offset + width,
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y_offset + height);
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}
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void
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cogl_clip_push_from_path_preserve (void)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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cogl2_clip_push_from_path (ctx->current_path);
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}
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#undef cogl_clip_push_from_path
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void
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cogl_clip_push_from_path (void)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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cogl2_clip_push_from_path (ctx->current_path);
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cogl_object_unref (ctx->current_path);
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ctx->current_path = cogl2_path_new ();
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}
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void
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cogl_clip_push_primitive (CoglPrimitive *primitive,
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float bounds_x1,
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float bounds_y1,
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float bounds_x2,
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float bounds_y2)
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{
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CoglFramebuffer *framebuffer;
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CoglClipState *clip_state;
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CoglMatrix modelview_matrix;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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framebuffer = cogl_get_draw_framebuffer ();
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clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
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cogl_get_modelview_matrix (&modelview_matrix);
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clip_state->stacks->data =
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_cogl_clip_stack_push_primitive (clip_state->stacks->data,
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primitive,
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bounds_x1, bounds_y1,
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bounds_x2, bounds_y2,
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&modelview_matrix);
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}
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static void
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_cogl_clip_pop_real (CoglClipState *clip_state)
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{
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clip_state->stacks->data = _cogl_clip_stack_pop (clip_state->stacks->data);
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}
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void
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cogl_clip_pop (void)
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{
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CoglFramebuffer *framebuffer;
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CoglClipState *clip_state;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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framebuffer = cogl_get_draw_framebuffer ();
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clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
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_cogl_clip_pop_real (clip_state);
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}
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void
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_cogl_clip_state_flush (CoglClipState *clip_state,
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CoglFramebuffer *framebuffer)
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{
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/* Flush the topmost stack. The clip stack code will bail out early
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if this is already flushed */
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_cogl_clip_stack_flush (clip_state->stacks->data,
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framebuffer);
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}
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/* XXX: This should never have been made public API! */
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void
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cogl_clip_ensure (void)
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{
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CoglFramebuffer *framebuffer = cogl_get_draw_framebuffer ();
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CoglClipState *clip_state;
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clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
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/* Flushing the clip state doesn't cause the journal to be
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flushed. This function may be being called by an external
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application however so it makes sense to flush the journal
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here */
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_cogl_framebuffer_flush_journal (framebuffer);
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_cogl_clip_state_flush (clip_state, framebuffer);
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}
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static void
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_cogl_clip_stack_save_real (CoglClipState *clip_state)
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{
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clip_state->stacks = g_slist_prepend (clip_state->stacks, NULL);
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}
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void
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cogl_clip_stack_save (void)
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{
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CoglFramebuffer *framebuffer;
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CoglClipState *clip_state;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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framebuffer = cogl_get_draw_framebuffer ();
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clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
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_cogl_clip_stack_save_real (clip_state);
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}
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static void
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_cogl_clip_stack_restore_real (CoglClipState *clip_state)
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{
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CoglHandle stack;
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_COGL_RETURN_IF_FAIL (clip_state->stacks != NULL);
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stack = clip_state->stacks->data;
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_cogl_clip_stack_unref (stack);
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/* Revert to an old stack */
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clip_state->stacks = g_slist_delete_link (clip_state->stacks,
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clip_state->stacks);
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}
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void
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cogl_clip_stack_restore (void)
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{
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CoglFramebuffer *framebuffer;
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CoglClipState *clip_state;
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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framebuffer = cogl_get_draw_framebuffer ();
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clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
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_cogl_clip_stack_restore_real (clip_state);
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}
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void
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_cogl_clip_state_init (CoglClipState *clip_state)
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{
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_COGL_GET_CONTEXT (ctx, NO_RETVAL);
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clip_state->stacks = NULL;
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/* Add an intial stack */
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_cogl_clip_stack_save_real (clip_state);
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}
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void
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_cogl_clip_state_destroy (CoglClipState *clip_state)
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{
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/* Destroy all of the stacks */
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while (clip_state->stacks)
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_cogl_clip_stack_restore_real (clip_state);
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}
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CoglClipStack *
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_cogl_clip_state_get_stack (CoglClipState *clip_state)
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{
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return clip_state->stacks->data;
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}
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void
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_cogl_clip_state_set_stack (CoglClipState *clip_state,
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CoglClipStack *stack)
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{
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/* Replace the top of the stack of stacks */
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_cogl_clip_stack_ref (stack);
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_cogl_clip_stack_unref (clip_state->stacks->data);
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clip_state->stacks->data = stack;
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}
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