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There used to be a function called cogl_clip_stack_save in the public API which was used when temporarily switching to an offscreen buffer to save the clip state. This is no longer necessary because each framebuffer has its own clip stack anyway so the function was removed in master. However the code to maintain the stack of stacks was retained. This patch removes it in an effort to simplify the code. On the 1.18 branch this function is deprecated and the documentation says that it does nothing. However that is incorrect because it does actually the push clip stack. I think it would be safe to backport this patch to the 1.18 branch and actually make it do nothing like it is documented to do. https://bugzilla.gnome.org/show_bug.cgi?id=719546 (cherry picked from commit 8655027fdcf03b02fcbbb02d179a0a88ed79c5b3) This patch has some extra changes while backporting to the 1.18 branch. Here the cogl-clip-state file still contained some deprecated functions. Instead of deleting the file completely it has been moved to the deprecated folder. The declarations for this functions have been moved from cogl1-context.h to a new deprecated/cogl-clip-state.h header. Conflicts: cogl/Makefile.am cogl/cogl-clip-state.c Reviewed-by: Robert Bragg <robert@linux.intel.com>
260 lines
9.0 KiB
C
260 lines
9.0 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) 2010,2013 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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#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
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#error "Only <cogl/cogl.h> can be included directly."
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#endif
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#ifndef __COGL_CLIP_STATE_H__
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#define __COGL_CLIP_STATE_H__
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#include <cogl/cogl-types.h>
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#include <cogl/cogl-macros.h>
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#include <cogl/cogl-primitive.h>
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COGL_BEGIN_DECLS
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/**
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* SECTION:cogl-clipping
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* @short_description: Fuctions for manipulating a stack of clipping regions
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*
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* To support clipping your geometry to rectangles or paths Cogl exposes a
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* stack based API whereby each clip region you push onto the stack is
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* intersected with the previous region.
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*/
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/**
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* cogl_clip_push_window_rectangle:
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* @x_offset: left edge of the clip rectangle in window coordinates
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* @y_offset: top edge of the clip rectangle in window coordinates
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* @width: width of the clip rectangle
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* @height: height of the clip rectangle
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*
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* Specifies a rectangular clipping area for all subsequent drawing
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* operations. Any drawing commands that extend outside the rectangle
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* will be clipped so that only the portion inside the rectangle will
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* be displayed. The rectangle dimensions are not transformed by the
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* current model-view matrix.
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*
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* The rectangle is intersected with the current clip region. To undo
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* the effect of this function, call cogl_clip_pop().
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*
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* Since: 1.2
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* Deprecated: 1.16: Use cogl_framebuffer_push_scissor_clip() instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_framebuffer_push_scissor_clip)
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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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* cogl_clip_push_window_rect:
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* @x_offset: left edge of the clip rectangle in window coordinates
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* @y_offset: top edge of the clip rectangle in window coordinates
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* @width: width of the clip rectangle
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* @height: height of the clip rectangle
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*
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* Specifies a rectangular clipping area for all subsequent drawing
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* operations. Any drawing commands that extend outside the rectangle
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* will be clipped so that only the portion inside the rectangle will
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* be displayed. The rectangle dimensions are not transformed by the
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* current model-view matrix.
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*
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* The rectangle is intersected with the current clip region. To undo
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* the effect of this function, call cogl_clip_pop().
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*
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* Deprecated: 1.16: Use cogl_framebuffer_push_scissor_clip() instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_framebuffer_push_scissor_clip)
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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_rectangle:
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* @x0: x coordinate for top left corner of the clip rectangle
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* @y0: y coordinate for top left corner of the clip rectangle
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* @x1: x coordinate for bottom right corner of the clip rectangle
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* @y1: y coordinate for bottom right corner of the clip rectangle
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*
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* Specifies a rectangular clipping area for all subsequent drawing
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* operations. Any drawing commands that extend outside the rectangle
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* will be clipped so that only the portion inside the rectangle will
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* be displayed. The rectangle dimensions are transformed by the
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* current model-view matrix.
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*
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* The rectangle is intersected with the current clip region. To undo
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* the effect of this function, call cogl_clip_pop().
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*
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* Since: 1.2
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* Deprecated: 1.16: Use cogl_framebuffer_push_rectangle_clip()
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* instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_framebuffer_push_rectangle_clip)
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void
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cogl_clip_push_rectangle (float x0,
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float y0,
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float x1,
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float y1);
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/**
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* cogl_clip_push:
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* @x_offset: left edge of the clip rectangle
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* @y_offset: top edge of the clip rectangle
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* @width: width of the clip rectangle
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* @height: height of the clip rectangle
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*
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* Specifies a rectangular clipping area for all subsequent drawing
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* operations. Any drawing commands that extend outside the rectangle
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* will be clipped so that only the portion inside the rectangle will
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* be displayed. The rectangle dimensions are transformed by the
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* current model-view matrix.
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*
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* The rectangle is intersected with the current clip region. To undo
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* the effect of this function, call cogl_clip_pop().
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*
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* Deprecated: 1.16: The x, y, width, height arguments are inconsistent
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* with other API that specify rectangles in model space, and when used
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* with a coordinate space that puts the origin at the center and y+
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* extending up, it's awkward to use. Please use
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* cogl_framebuffer_push_rectangle_clip()
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_framebuffer_push_rectangle_clip)
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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_primitive:
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* @primitive: A #CoglPrimitive describing a flat 2D shape
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* @bounds_x1: x coordinate for the top-left corner of the primitives
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* bounds
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* @bounds_y1: y coordinate for the top-left corner of the primitives
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* bounds
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* @bounds_x2: x coordinate for the bottom-right corner of the primitives
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* bounds
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* @bounds_y2: y coordinate for the bottom-right corner of the
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* primitives bounds.
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*
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* Sets a new clipping area using a 2D shaped described with a
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* #CoglPrimitive. The shape must not contain self overlapping
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* geometry and must lie on a single 2D plane. A bounding box of the
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* 2D shape in local coordinates (the same coordinates used to
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* describe the shape) must be given. It is acceptable for the bounds
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* to be larger than the true bounds but behaviour is undefined if the
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* bounds are smaller than the true bounds.
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*
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* The primitive is transformed by the current model-view matrix and
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* the silhouette is intersected with the previous clipping area. To
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* restore the previous clipping area, call
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* cogl_clip_pop().
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*
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* Since: 1.10
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* Stability: unstable
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* Deprecated: 1.16: Use cogl_framebuffer_push_primitive_clip()
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* instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_framebuffer_push_primitive_clip)
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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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* cogl_clip_pop:
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*
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* Reverts the clipping region to the state before the last call to
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* cogl_clip_push().
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*
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* Deprecated: 1.16: Use cogl_framebuffer_pop_clip() instead
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*/
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COGL_DEPRECATED_IN_1_16_FOR (cogl_framebuffer_pop_clip)
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void
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cogl_clip_pop (void);
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/**
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* cogl_clip_ensure:
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*
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* Ensures that the current clipping region has been set in GL. This
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* will automatically be called before any Cogl primitives but it
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* maybe be neccessary to call if you are using raw GL calls with
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* clipping.
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*
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* Deprecated: 1.2: Calling this function has no effect
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*
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* Since: 1.0
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*/
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COGL_DEPRECATED
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void
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cogl_clip_ensure (void);
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/**
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* cogl_clip_stack_save:
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*
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* Save the entire state of the clipping stack and then clear all
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* clipping. The previous state can be returned to with
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* cogl_clip_stack_restore(). Each call to cogl_clip_push() after this
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* must be matched by a call to cogl_clip_pop() before calling
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* cogl_clip_stack_restore().
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*
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* Deprecated: 1.2: This was originally added to allow us to save the
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* clip stack when switching to an offscreen framebuffer, but it's
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* not necessary anymore given that framebuffers now own separate
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* clip stacks which will be automatically switched between when a
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* new buffer is set. Calling this function has no effect
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*
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* Since: 0.8.2
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*/
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COGL_DEPRECATED
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void
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cogl_clip_stack_save (void);
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/**
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* cogl_clip_stack_restore:
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*
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* Restore the state of the clipping stack that was previously saved
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* by cogl_clip_stack_save().
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*
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* Deprecated: 1.2: This was originally added to allow us to restore
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* the clip stack when switching back from an offscreen framebuffer,
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* but it's not necessary anymore given that framebuffers now own
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* separate clip stacks which will be automatically switched between
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* when a new buffer is set. Calling this function has no effect
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*
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* Since: 0.8.2
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*/
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COGL_DEPRECATED
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void
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cogl_clip_stack_restore (void);
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COGL_END_DECLS
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#endif /* __COGL_CLIP_STATE_H__ */
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