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07e49d5257
Previously in cogl-clip-state.c when it detected that the current modelview matrix is screen-aligned it would convert the clip entry to a window clip. Instead of doing this cogl-clip-stack.c now contains the detection and keeps the entry as a rectangle clip but marks that it is entirely described by its scissor rect. When flusing the clip stack it doesn't do anything extra for entries that have this mark (because the clip will already been setup by the scissor). This is needed so that we can still track the original rectangle coordinates and modelview matrix to help detect when it would be faster to modify the rectangle when adding it to the journal rather than having to break up the batch to set the clip state.
282 lines
6.9 KiB
C
282 lines
6.9 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.h"
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#include "cogl-context.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_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_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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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_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_from_path (clip_state->stacks->data,
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ctx->current_path,
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&modelview_matrix);
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}
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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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cogl_clip_push_from_path_preserve ();
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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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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_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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{
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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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}
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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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CoglClipState *clip_state;
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clip_state = _cogl_framebuffer_get_clip_state (_cogl_get_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_journal_flush ();
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_cogl_clip_state_flush (clip_state);
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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_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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g_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_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_get_clip_stack (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, COGL_INVALID_HANDLE);
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framebuffer = _cogl_get_framebuffer ();
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clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
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return clip_state->stacks->data;
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}
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void
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_cogl_set_clip_stack (CoglClipStack *stack)
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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_framebuffer ();
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clip_state = _cogl_framebuffer_get_clip_state (framebuffer);
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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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