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mutter/cogl/cogl-swap-chain.h

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Adds renderer,display,onscreen-template and swap-chain stubs As part of the process of splitting Cogl out as a standalone graphics API we need to introduce some API concepts that will allow us to initialize a new CoglContext when Clutter isn't there to handle that for us... The new objects roughly in the order that they are (optionally) involved in constructing a context are: CoglRenderer, CoglOnscreenTemplate, CoglSwapChain and CoglDisplay. Conceptually a CoglRenderer represents a means for rendering. Cogl supports rendering via OpenGL or OpenGL ES 1/2.0 and those APIs are accessed through a number of different windowing APIs such as GLX, EGL, SDL or WGL and more. Potentially in the future Cogl could render using D3D or even by using libdrm and directly banging the hardware. All these choices are wrapped up in the configuration of a CoglRenderer. Conceptually a CoglDisplay represents a display pipeline for a renderer. Although Cogl doesn't aim to provide a detailed abstraction of display hardware, on some platforms we can give control over multiple display planes (On TV platforms for instance video content may be on one plane and 3D would be on another so a CoglDisplay lets you select the plane up-front.) Another aspect of CoglDisplay is that it lets us negotiate a display pipeline that best supports the type of CoglOnscreen framebuffers we are planning to create. For instance if you want transparent CoglOnscreen framebuffers then we have to be sure the display pipeline wont discard the alpha component of your framebuffers. Or if you want to use double/tripple buffering that requires support from the display pipeline. CoglOnscreenTemplate and CoglSwapChain are how we describe our default CoglOnscreen framebuffer configuration which can affect the configuration of the display pipeline. The default/simple way we expect most CoglContexts to be constructed will be via something like: if (!cogl_context_new (NULL, &error)) g_error ("Failed to construct a CoglContext: %s", error->message); Where that NULL is for an optional "display" parameter and NULL says to Cogl "please just try to do something sensible". If you want some more control though you can manually construct a CoglDisplay something like: display = cogl_display_new (NULL, NULL); cogl_gdl_display_set_plane (display, plane); if (!cogl_display_setup (display, &error)) g_error ("Failed to setup a CoglDisplay: %s", error->message); And in a similar fashion to cogl_context_new() you can optionally pass a NULL "renderer" and/or a NULL "onscreen template" so Cogl will try to just do something sensible. If you need to change the CoglOnscreen defaults you can provide a template something like: chain = cogl_swap_chain_new (); cogl_swap_chain_set_has_alpha (chain, TRUE); cogl_swap_chain_set_length (chain, 3); onscreen_template = cogl_onscreen_template_new (chain); cogl_onscreen_template_set_pixel_format (onscreen_template, COGL_PIXEL_FORMAT_RGB565); display = cogl_display_new (NULL, onscreen_template); if (!cogl_display_setup (display, &error)) g_error ("Failed to setup a CoglDisplay: %s", error->message);
2011-02-25 17:06:50 +00:00
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2011 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#if !defined(__COGL_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
#error "Only <cogl/cogl.h> can be included directly."
#endif
#ifndef __COGL_SWAP_CHAIN_H__
#define __COGL_SWAP_CHAIN_H__
G_BEGIN_DECLS
typedef struct _CoglSwapChain CoglSwapChain;
#define cogl_swap_chain_new cogl_swap_chain_new_EXP
CoglSwapChain *
cogl_swap_chain_new (void);
#define cogl_swap_chain_set_has_alpha cogl_swap_chain_set_has_alpha_EXP
void
cogl_swap_chain_set_has_alpha (CoglSwapChain *swap_chain,
gboolean has_alpha);
EGL: Updates GDL platform support The GDL API is used for example on intel ce4100 (aka Sodaville) based systems as a way to allocate memory that can be composited using the platforms overlay hardware. This updates the Cogl EGL winsys and the support in Clutter so we can continue to support these platforms.
2011-03-04 12:50:39 +00:00
#define cogl_swap_chain_set_length cogl_swap_chain_set_length_EXP
void
cogl_swap_chain_set_length (CoglSwapChain *swap_chain,
int length);
Add -Wmissing-declarations to maintainer flags and fix problems This option to GCC makes it give a warning whenever a global function is defined without a declaration. This should catch cases were we've defined a function but forgot to put it in a header. In that case it is either only used within one file so we should make it static or we should declare it in a header. The following changes where made to fix problems: • Some functions were made static • cogl-path.h (the one containing the 1.0 API) was split into two files, one defining the functions and one defining the enums so that cogl-path.c can include the enum and function declarations from the 2.0 API as well as the function declarations from the 1.0 API. • cogl2-clip-state has been removed. This only had one experimental function called cogl_clip_push_from_path but as this is unstable we might as well remove it favour of the equivalent cogl_framebuffer_* API. • The GLX, SDL and WGL winsys's now have a private header to define their get_vtable function instead of directly declaring in the C file where it is called. • All places that were calling COGL_OBJECT_DEFINE need to have the cogl_is_whatever function declared so these have been added either as a public function or in a private header. • Some files that were not including the header containing their function declarations have been fixed to do so. • Any unused error quark functions have been removed. If we later want them we should add them back one by one and add a declaration for them in a header. • _cogl_is_framebuffer has been renamed to cogl_is_framebuffer and made a public function with a declaration in cogl-framebuffer.h • Similarly for CoglOnscreen. • cogl_vdraw_indexed_attributes is called cogl_framebuffer_vdraw_indexed_attributes in the header. The definition has been changed to match the header. • cogl_index_buffer_allocate has been removed. This had no declaration and I'm not sure what it's supposed to do. • CoglJournal has been changed to use the internal CoglObject macro so that it won't define an exported cogl_is_journal symbol. • The _cogl_blah_pointer_from_handle functions have been removed. CoglHandle isn't used much anymore anyway and in the few places where it is used I think it's safe to just use the implicit cast from void* to the right type. • The test-utils.h header for the conformance tests explicitly disables the -Wmissing-declaration option using a pragma because all of the tests declare their main function without a header. Any mistakes relating to missing declarations aren't really important for the tests. • cogl_quaternion_init_from_quaternion and init_from_matrix have been given declarations in cogl-quaternion.h Reviewed-by: Robert Bragg <robert@linux.intel.com>
2012-03-06 18:21:28 +00:00
gboolean
cogl_is_swap_chain (void *object);
Adds renderer,display,onscreen-template and swap-chain stubs As part of the process of splitting Cogl out as a standalone graphics API we need to introduce some API concepts that will allow us to initialize a new CoglContext when Clutter isn't there to handle that for us... The new objects roughly in the order that they are (optionally) involved in constructing a context are: CoglRenderer, CoglOnscreenTemplate, CoglSwapChain and CoglDisplay. Conceptually a CoglRenderer represents a means for rendering. Cogl supports rendering via OpenGL or OpenGL ES 1/2.0 and those APIs are accessed through a number of different windowing APIs such as GLX, EGL, SDL or WGL and more. Potentially in the future Cogl could render using D3D or even by using libdrm and directly banging the hardware. All these choices are wrapped up in the configuration of a CoglRenderer. Conceptually a CoglDisplay represents a display pipeline for a renderer. Although Cogl doesn't aim to provide a detailed abstraction of display hardware, on some platforms we can give control over multiple display planes (On TV platforms for instance video content may be on one plane and 3D would be on another so a CoglDisplay lets you select the plane up-front.) Another aspect of CoglDisplay is that it lets us negotiate a display pipeline that best supports the type of CoglOnscreen framebuffers we are planning to create. For instance if you want transparent CoglOnscreen framebuffers then we have to be sure the display pipeline wont discard the alpha component of your framebuffers. Or if you want to use double/tripple buffering that requires support from the display pipeline. CoglOnscreenTemplate and CoglSwapChain are how we describe our default CoglOnscreen framebuffer configuration which can affect the configuration of the display pipeline. The default/simple way we expect most CoglContexts to be constructed will be via something like: if (!cogl_context_new (NULL, &error)) g_error ("Failed to construct a CoglContext: %s", error->message); Where that NULL is for an optional "display" parameter and NULL says to Cogl "please just try to do something sensible". If you want some more control though you can manually construct a CoglDisplay something like: display = cogl_display_new (NULL, NULL); cogl_gdl_display_set_plane (display, plane); if (!cogl_display_setup (display, &error)) g_error ("Failed to setup a CoglDisplay: %s", error->message); And in a similar fashion to cogl_context_new() you can optionally pass a NULL "renderer" and/or a NULL "onscreen template" so Cogl will try to just do something sensible. If you need to change the CoglOnscreen defaults you can provide a template something like: chain = cogl_swap_chain_new (); cogl_swap_chain_set_has_alpha (chain, TRUE); cogl_swap_chain_set_length (chain, 3); onscreen_template = cogl_onscreen_template_new (chain); cogl_onscreen_template_set_pixel_format (onscreen_template, COGL_PIXEL_FORMAT_RGB565); display = cogl_display_new (NULL, onscreen_template); if (!cogl_display_setup (display, &error)) g_error ("Failed to setup a CoglDisplay: %s", error->message);
2011-02-25 17:06:50 +00:00
G_END_DECLS
#endif /* __COGL_SWAP_CHAIN_H__ */
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