3a4a858ce3
This macro was introduced so as to be able to be built without GLib. However, this feature was long ago removed, and in Mutter we depend on it anyway, so let's get rid of it in favor of more consistency.
266 lines
9.2 KiB
C
266 lines
9.2 KiB
C
/*
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* Cogl
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*
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* A Low Level GPU Graphics and Utilities API
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*
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* Copyright (C) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use, copy,
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* modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*
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*/
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#ifndef __COGL_FRAMEBUFFER_DEPRECATED_H__
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#define __COGL_FRAMEBUFFER_DEPRECATED_H__
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#include <cogl/cogl-framebuffer.h>
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#include <cogl/cogl-macros.h>
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G_BEGIN_DECLS
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/**
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* cogl_set_framebuffer: (skip)
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* @buffer: A #CoglFramebuffer object, either onscreen or offscreen.
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*
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* This redirects all subsequent drawing to the specified framebuffer. This can
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* either be an offscreen buffer created with cogl_offscreen_new_to_texture ()
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* or in the future it may be an onscreen framebuffers too.
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*
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* Since: 1.2
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED
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void
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cogl_set_framebuffer (CoglFramebuffer *buffer);
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/**
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* cogl_push_framebuffer: (skip)
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* @buffer: A #CoglFramebuffer object, either onscreen or offscreen.
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*
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* Redirects all subsequent drawing to the specified framebuffer. This can
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* either be an offscreen buffer created with cogl_offscreen_new_to_texture ()
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* or in the future it may be an onscreen framebuffer too.
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*
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* You should understand that a framebuffer owns the following state:
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* <itemizedlist>
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* <listitem><simpara>The projection matrix</simpara></listitem>
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* <listitem><simpara>The modelview matrix stack</simpara></listitem>
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* <listitem><simpara>The viewport</simpara></listitem>
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* <listitem><simpara>The clip stack</simpara></listitem>
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* </itemizedlist>
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* So these items will automatically be saved and restored when you
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* push and pop between different framebuffers.
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*
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* Also remember a newly allocated framebuffer will have an identity matrix for
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* the projection and modelview matrices which gives you a coordinate space
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* like OpenGL with (-1, -1) corresponding to the top left of the viewport,
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* (1, 1) corresponding to the bottom right and +z coming out towards the
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* viewer.
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*
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* If you want to set up a coordinate space like Clutter does with (0, 0)
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* corresponding to the top left and (framebuffer_width, framebuffer_height)
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* corresponding to the bottom right you can do so like this:
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*
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* |[
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* static void
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* setup_viewport (unsigned int width,
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* unsigned int height,
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* float fovy,
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* float aspect,
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* float z_near,
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* float z_far)
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* {
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* float z_camera;
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* CoglMatrix projection_matrix;
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* CoglMatrix mv_matrix;
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*
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* cogl_set_viewport (0, 0, width, height);
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* cogl_perspective (fovy, aspect, z_near, z_far);
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*
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* cogl_get_projection_matrix (&projection_matrix);
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* z_camera = 0.5 * projection_matrix.xx;
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*
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* cogl_matrix_init_identity (&mv_matrix);
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* cogl_matrix_translate (&mv_matrix, -0.5f, -0.5f, -z_camera);
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* cogl_matrix_scale (&mv_matrix, 1.0f / width, -1.0f / height, 1.0f / width);
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* cogl_matrix_translate (&mv_matrix, 0.0f, -1.0 * height, 0.0f);
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* cogl_set_modelview_matrix (&mv_matrix);
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* }
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*
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* static void
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* my_init_framebuffer (ClutterStage *stage,
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* CoglFramebuffer *framebuffer,
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* unsigned int framebuffer_width,
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* unsigned int framebuffer_height)
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* {
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* ClutterPerspective perspective;
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*
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* clutter_stage_get_perspective (stage, &perspective);
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*
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* cogl_push_framebuffer (framebuffer);
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* setup_viewport (framebuffer_width,
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* framebuffer_height,
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* perspective.fovy,
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* perspective.aspect,
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* perspective.z_near,
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* perspective.z_far);
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* }
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* ]|
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*
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* The previous framebuffer can be restored by calling cogl_pop_framebuffer()
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*
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* Since: 1.2
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED
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void
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cogl_push_framebuffer (CoglFramebuffer *buffer);
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/**
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* cogl_pop_framebuffer: (skip)
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*
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* Restores the framebuffer that was previously at the top of the stack.
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* All subsequent drawing will be redirected to this framebuffer.
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*
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* Since: 1.2
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED
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void
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cogl_pop_framebuffer (void);
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/**
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* cogl_set_draw_buffer:
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* @target: A #CoglBufferTarget that specifies what kind of framebuffer you
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* are setting as the render target.
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* @offscreen: If you are setting a framebuffer of type COGL_OFFSCREEN_BUFFER
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* then this is a CoglHandle for the offscreen buffer.
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*
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* Redirects all subsequent drawing to the specified framebuffer. This
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* can either be an offscreen buffer created with
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* cogl_offscreen_new_to_texture () or you can revert to your original
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* on screen window buffer.
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*
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED
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void
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cogl_set_draw_buffer (CoglBufferTarget target,
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CoglHandle offscreen);
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/**
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* cogl_push_draw_buffer:
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*
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* Save cogl_set_draw_buffer() state.
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*
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED
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void
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cogl_push_draw_buffer (void);
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/**
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* cogl_pop_draw_buffer:
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*
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* Restore cogl_set_draw_buffer() state.
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*
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* Deprecated: 1.16: The latest drawing apis take explicit
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* #CoglFramebuffer arguments so this stack of
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* framebuffers shouldn't be used anymore.
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*/
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COGL_DEPRECATED
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void
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cogl_pop_draw_buffer (void);
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/**
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* cogl_read_pixels:
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* @x: The window x position to start reading from
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* @y: The window y position to start reading from
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* @width: The width of the rectangle you want to read
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* @height: The height of the rectangle you want to read
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* @source: Identifies which auxillary buffer you want to read
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* (only COGL_READ_PIXELS_COLOR_BUFFER supported currently)
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* @format: The pixel format you want the result in
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* (only COGL_PIXEL_FORMAT_RGBA_8888 supported currently)
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* @pixels: The location to write the pixel data.
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*
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* This reads a rectangle of pixels from the current framebuffer where
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* position (0, 0) is the top left. The pixel at (x, y) is the first
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* read, and the data is returned with a rowstride of (width * 4).
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*
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* Currently Cogl assumes that the framebuffer is in a premultiplied
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* format so if @format is non-premultiplied it will convert it. To
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* read the pixel values without any conversion you should either
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* specify a format that doesn't use an alpha channel or use one of
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* the formats ending in PRE.
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*
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* Deprecated: 1.16: Use cogl_framebuffer_read_pixels() instead
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*/
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COGL_DEPRECATED_FOR (cogl_framebuffer_read_pixels)
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void
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cogl_read_pixels (int x,
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int y,
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int width,
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int height,
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CoglReadPixelsFlags source,
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CoglPixelFormat format,
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uint8_t *pixels);
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/* XXX: Since this api was marked unstable, maybe we can just
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* remove this api if we can't find anyone is using it. */
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/**
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* cogl_framebuffer_get_color_format: (skip)
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* @framebuffer: A #CoglFramebuffer framebuffer
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*
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* Queries the common #CoglPixelFormat of all color buffers attached
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* to this framebuffer. For an offscreen framebuffer created with
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* cogl_offscreen_new_with_texture() this will correspond to the format
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* of the texture.
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*
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* This API is deprecated because it is missleading to report a
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* #CoglPixelFormat for the internal format of the @framebuffer since
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* #CoglPixelFormat is such a precise format description and it's
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* only the set of components and the premultiplied alpha status
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* that is really known.
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*
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* Since: 1.8
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* Stability: unstable
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* Deprecated 1.18: Removed since it is misleading
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*/
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COGL_DEPRECATED
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CoglPixelFormat
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cogl_framebuffer_get_color_format (CoglFramebuffer *framebuffer);
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G_END_DECLS
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#endif /* __COGL_FRAMEBUFFER_DEPRECATED_H__ */
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