mirror of
https://github.com/brl/mutter.git
synced 2024-12-29 14:22:13 +00:00
27dbf700d6
Prevent Cogl function names from being mangled when a C++ compiler is
being used by adding some missing COGL_{BEGIN,END}_DECLS guards.
https://bugzilla.gnome.org/show_bug.cgi?id=728628
Reviewed-by: Neil Roberts <neil@linux.intel.com>
265 lines
9.2 KiB
C
265 lines
9.2 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.
|
|
*
|
|
*
|
|
*/
|
|
|
|
#ifndef __COGL_FRAMEBUFFER_DEPRECATED_H__
|
|
#define __COGL_FRAMEBUFFER_DEPRECATED_H__
|
|
|
|
#include <cogl/cogl-macros.h>
|
|
|
|
COGL_BEGIN_DECLS
|
|
|
|
/**
|
|
* cogl_set_framebuffer:
|
|
* @buffer: A #CoglFramebuffer object, either onscreen or offscreen.
|
|
*
|
|
* This redirects all subsequent drawing to the specified framebuffer. This can
|
|
* either be an offscreen buffer created with cogl_offscreen_new_to_texture ()
|
|
* or in the future it may be an onscreen framebuffers too.
|
|
*
|
|
* Since: 1.2
|
|
* Deprecated: 1.16: The latest drawing apis take explicit
|
|
* #CoglFramebuffer arguments so this stack of
|
|
* framebuffers shouldn't be used anymore.
|
|
*/
|
|
COGL_DEPRECATED_IN_1_16
|
|
void
|
|
cogl_set_framebuffer (CoglFramebuffer *buffer);
|
|
|
|
/**
|
|
* cogl_push_framebuffer:
|
|
* @buffer: A #CoglFramebuffer object, either onscreen or offscreen.
|
|
*
|
|
* Redirects all subsequent drawing to the specified framebuffer. This can
|
|
* either be an offscreen buffer created with cogl_offscreen_new_to_texture ()
|
|
* or in the future it may be an onscreen framebuffer too.
|
|
*
|
|
* You should understand that a framebuffer owns the following state:
|
|
* <itemizedlist>
|
|
* <listitem><simpara>The projection matrix</simpara></listitem>
|
|
* <listitem><simpara>The modelview matrix stack</simpara></listitem>
|
|
* <listitem><simpara>The viewport</simpara></listitem>
|
|
* <listitem><simpara>The clip stack</simpara></listitem>
|
|
* </itemizedlist>
|
|
* So these items will automatically be saved and restored when you
|
|
* push and pop between different framebuffers.
|
|
*
|
|
* Also remember a newly allocated framebuffer will have an identity matrix for
|
|
* the projection and modelview matrices which gives you a coordinate space
|
|
* like OpenGL with (-1, -1) corresponding to the top left of the viewport,
|
|
* (1, 1) corresponding to the bottom right and +z coming out towards the
|
|
* viewer.
|
|
*
|
|
* If you want to set up a coordinate space like Clutter does with (0, 0)
|
|
* corresponding to the top left and (framebuffer_width, framebuffer_height)
|
|
* corresponding to the bottom right you can do so like this:
|
|
*
|
|
* |[
|
|
* static void
|
|
* setup_viewport (unsigned int width,
|
|
* unsigned int height,
|
|
* float fovy,
|
|
* float aspect,
|
|
* float z_near,
|
|
* float z_far)
|
|
* {
|
|
* float z_camera;
|
|
* CoglMatrix projection_matrix;
|
|
* CoglMatrix mv_matrix;
|
|
*
|
|
* cogl_set_viewport (0, 0, width, height);
|
|
* cogl_perspective (fovy, aspect, z_near, z_far);
|
|
*
|
|
* cogl_get_projection_matrix (&projection_matrix);
|
|
* z_camera = 0.5 * projection_matrix.xx;
|
|
*
|
|
* cogl_matrix_init_identity (&mv_matrix);
|
|
* cogl_matrix_translate (&mv_matrix, -0.5f, -0.5f, -z_camera);
|
|
* cogl_matrix_scale (&mv_matrix, 1.0f / width, -1.0f / height, 1.0f / width);
|
|
* cogl_matrix_translate (&mv_matrix, 0.0f, -1.0 * height, 0.0f);
|
|
* cogl_set_modelview_matrix (&mv_matrix);
|
|
* }
|
|
*
|
|
* static void
|
|
* my_init_framebuffer (ClutterStage *stage,
|
|
* CoglFramebuffer *framebuffer,
|
|
* unsigned int framebuffer_width,
|
|
* unsigned int framebuffer_height)
|
|
* {
|
|
* ClutterPerspective perspective;
|
|
*
|
|
* clutter_stage_get_perspective (stage, &perspective);
|
|
*
|
|
* cogl_push_framebuffer (framebuffer);
|
|
* setup_viewport (framebuffer_width,
|
|
* framebuffer_height,
|
|
* perspective.fovy,
|
|
* perspective.aspect,
|
|
* perspective.z_near,
|
|
* perspective.z_far);
|
|
* }
|
|
* ]|
|
|
*
|
|
* The previous framebuffer can be restored by calling cogl_pop_framebuffer()
|
|
*
|
|
* Since: 1.2
|
|
* Deprecated: 1.16: The latest drawing apis take explicit
|
|
* #CoglFramebuffer arguments so this stack of
|
|
* framebuffers shouldn't be used anymore.
|
|
*/
|
|
COGL_DEPRECATED_IN_1_16
|
|
void
|
|
cogl_push_framebuffer (CoglFramebuffer *buffer);
|
|
|
|
/**
|
|
* cogl_pop_framebuffer:
|
|
*
|
|
* Restores the framebuffer that was previously at the top of the stack.
|
|
* All subsequent drawing will be redirected to this framebuffer.
|
|
*
|
|
* Since: 1.2
|
|
* Deprecated: 1.16: The latest drawing apis take explicit
|
|
* #CoglFramebuffer arguments so this stack of
|
|
* framebuffers shouldn't be used anymore.
|
|
*/
|
|
COGL_DEPRECATED_IN_1_16
|
|
void
|
|
cogl_pop_framebuffer (void);
|
|
|
|
/**
|
|
* cogl_set_draw_buffer:
|
|
* @target: A #CoglBufferTarget that specifies what kind of framebuffer you
|
|
* are setting as the render target.
|
|
* @offscreen: If you are setting a framebuffer of type COGL_OFFSCREEN_BUFFER
|
|
* then this is a CoglHandle for the offscreen buffer.
|
|
*
|
|
* Redirects all subsequent drawing to the specified framebuffer. This
|
|
* can either be an offscreen buffer created with
|
|
* cogl_offscreen_new_to_texture () or you can revert to your original
|
|
* on screen window buffer.
|
|
*
|
|
* Deprecated: 1.16: The latest drawing apis take explicit
|
|
* #CoglFramebuffer arguments so this stack of
|
|
* framebuffers shouldn't be used anymore.
|
|
*/
|
|
COGL_DEPRECATED_IN_1_16
|
|
void
|
|
cogl_set_draw_buffer (CoglBufferTarget target,
|
|
CoglHandle offscreen);
|
|
|
|
/**
|
|
* cogl_push_draw_buffer:
|
|
*
|
|
* Save cogl_set_draw_buffer() state.
|
|
*
|
|
* Deprecated: 1.16: The latest drawing apis take explicit
|
|
* #CoglFramebuffer arguments so this stack of
|
|
* framebuffers shouldn't be used anymore.
|
|
*/
|
|
COGL_DEPRECATED_IN_1_16
|
|
void
|
|
cogl_push_draw_buffer (void);
|
|
|
|
/**
|
|
* cogl_pop_draw_buffer:
|
|
*
|
|
* Restore cogl_set_draw_buffer() state.
|
|
*
|
|
* Deprecated: 1.16: The latest drawing apis take explicit
|
|
* #CoglFramebuffer arguments so this stack of
|
|
* framebuffers shouldn't be used anymore.
|
|
*/
|
|
COGL_DEPRECATED_IN_1_16
|
|
void
|
|
cogl_pop_draw_buffer (void);
|
|
|
|
/**
|
|
* cogl_read_pixels:
|
|
* @x: The window x position to start reading from
|
|
* @y: The window y position to start reading from
|
|
* @width: The width of the rectangle you want to read
|
|
* @height: The height of the rectangle you want to read
|
|
* @source: Identifies which auxillary buffer you want to read
|
|
* (only COGL_READ_PIXELS_COLOR_BUFFER supported currently)
|
|
* @format: The pixel format you want the result in
|
|
* (only COGL_PIXEL_FORMAT_RGBA_8888 supported currently)
|
|
* @pixels: The location to write the pixel data.
|
|
*
|
|
* This reads a rectangle of pixels from the current framebuffer where
|
|
* position (0, 0) is the top left. The pixel at (x, y) is the first
|
|
* read, and the data is returned with a rowstride of (width * 4).
|
|
*
|
|
* Currently Cogl assumes that the framebuffer is in a premultiplied
|
|
* format so if @format is non-premultiplied it will convert it. To
|
|
* read the pixel values without any conversion you should either
|
|
* specify a format that doesn't use an alpha channel or use one of
|
|
* the formats ending in PRE.
|
|
*
|
|
* Deprecated: 1.16: Use cogl_framebuffer_read_pixels() instead
|
|
*/
|
|
COGL_DEPRECATED_IN_1_16_FOR (cogl_framebuffer_read_pixels)
|
|
void
|
|
cogl_read_pixels (int x,
|
|
int y,
|
|
int width,
|
|
int height,
|
|
CoglReadPixelsFlags source,
|
|
CoglPixelFormat format,
|
|
uint8_t *pixels);
|
|
|
|
|
|
/* XXX: Since this api was marked unstable, maybe we can just
|
|
* remove this api if we can't find anyone is using it. */
|
|
/**
|
|
* cogl_framebuffer_get_color_format:
|
|
* @framebuffer: A #CoglFramebuffer framebuffer
|
|
*
|
|
* Queries the common #CoglPixelFormat of all color buffers attached
|
|
* to this framebuffer. For an offscreen framebuffer created with
|
|
* cogl_offscreen_new_with_texture() this will correspond to the format
|
|
* of the texture.
|
|
*
|
|
* This API is deprecated because it is missleading to report a
|
|
* #CoglPixelFormat for the internal format of the @framebuffer since
|
|
* #CoglPixelFormat is such a precise format description and it's
|
|
* only the set of components and the premultiplied alpha status
|
|
* that is really known.
|
|
*
|
|
* Since: 1.8
|
|
* Stability: unstable
|
|
* Deprecated 1.18: Removed since it is misleading
|
|
*/
|
|
COGL_DEPRECATED_IN_1_18
|
|
CoglPixelFormat
|
|
cogl_framebuffer_get_color_format (CoglFramebuffer *framebuffer);
|
|
|
|
COGL_END_DECLS
|
|
|
|
#endif /* __COGL_FRAMEBUFFER_DEPRECATED_H__ */
|