31a9726506
This fixes the build with --enable-introspection. I'm not sure why g-ir-scanner seems to parse all public headers in isolation instead of being able take a more limited list of top-level public headers and automatically parse all necessary #include directives but this means we have to special case how we define and undefine __COGL_H_INSIDE__ to subvert the guards we have in place for detecting misuse of the headers. Reviewed-by: Neil Roberts <neil@linux.intel.com> (cherry picked from commit e0b2255876c1cf11d124d5ae37cbe9a6e43777f1)
404 lines
13 KiB
C
404 lines
13 KiB
C
/*
|
|
* Cogl
|
|
*
|
|
* An object oriented GL/GLES Abstraction/Utility Layer
|
|
*
|
|
* Copyright (C) 2011 Collabora Ltd.
|
|
* Copyright (C) 2012 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, see
|
|
* <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Authors:
|
|
* Tomeu Vizoso <tomeu.vizoso@collabora.com>
|
|
* Robert Bragg <robert@linux.intel.com>
|
|
*
|
|
*/
|
|
|
|
#ifndef __COGL_GLES2_H__
|
|
#define __COGL_GLES2_H__
|
|
|
|
/* NB: cogl-gles2.h is a top-level header that can be included directly
|
|
* but we want to be careful not to define __COGL_H_INSIDE__ when this
|
|
* is included internally while building Cogl itself since
|
|
* __COGL_H_INSIDE__ is used in headers to guard public vs private
|
|
* api definitions
|
|
*/
|
|
#ifndef COGL_COMPILATION
|
|
|
|
/* Note: When building Cogl .gir we explicitly define
|
|
* __COGL_H_INSIDE__ */
|
|
#ifndef __COGL_H_INSIDE__
|
|
#define __COGL_H_INSIDE__
|
|
#define __COGL_MUST_UNDEF_COGL_H_INSIDE__
|
|
#endif
|
|
|
|
#endif /* COGL_COMPILATION */
|
|
|
|
#include <cogl/cogl-defines.h>
|
|
#include <cogl/cogl-context.h>
|
|
#include <cogl/cogl-framebuffer.h>
|
|
#include <cogl/cogl-texture.h>
|
|
#include <cogl/cogl-texture-2d.h>
|
|
|
|
/* CoglGLES2Vtable depends on GLES 2.0 typedefs being available but we
|
|
* want to be careful that the public api doesn't expose arbitrary
|
|
* system GL headers as part of the Cogl API so although when building
|
|
* internally we consistently refer to the system headers to avoid
|
|
* conflicts we only expose the minimal set of GLES 2.0 types and enums
|
|
* publicly.
|
|
*/
|
|
#ifdef COGL_COMPILATION
|
|
#include "cogl-gl-header.h"
|
|
#else
|
|
#include <cogl/cogl-gles2-types.h>
|
|
#endif
|
|
|
|
COGL_BEGIN_DECLS
|
|
|
|
/**
|
|
* SECTION:cogl-gles2
|
|
* @short_description: A portable api to access OpenGLES 2.0
|
|
*
|
|
* Cogl provides portable access to the OpenGLES api through a single
|
|
* library that is able to smooth over inconsistencies between the
|
|
* different vendor drivers for OpenGLES in a single place.
|
|
*
|
|
* The api is designed to allow Cogl to transparently implement the
|
|
* api on top of other drivers, such as OpenGL, D3D or on Cogl's own
|
|
* drawing api so even if your platform doesn't come with an
|
|
* OpenGLES 2.0 api Cogl may still be able to expose the api to your
|
|
* application.
|
|
*
|
|
* Since Cogl is a library and not an api specification it is possible
|
|
* to add OpenGLES 2.0 api features to Cogl which can immidiately
|
|
* benefit developers regardless of what platform they are running on.
|
|
*
|
|
* With this api it's possible to re-use existing OpenGLES 2.0 code
|
|
* within applications that are rendering with the Cogl API and also
|
|
* it's possible for applications that render using OpenGLES 2.0 to
|
|
* incorporate content rendered with Cogl.
|
|
*
|
|
* Applications can check for OpenGLES 2.0 api support by checking for
|
|
* %COGL_FEATURE_ID_GLES2_CONTEXT support with cogl_has_feature().
|
|
*
|
|
* Since: 1.12
|
|
* Stability: unstable
|
|
*/
|
|
|
|
/**
|
|
* CoglGLES2Context:
|
|
*
|
|
* Represents an OpenGLES 2.0 api context used as a sandbox for
|
|
* OpenGLES 2.0 state. This is comparable to an EGLContext for those
|
|
* who have used OpenGLES 2.0 with EGL before.
|
|
*
|
|
* Since: 1.12
|
|
* Stability: unstable
|
|
*/
|
|
typedef struct _CoglGLES2Context CoglGLES2Context;
|
|
|
|
/**
|
|
* CoglGLES2Vtable:
|
|
*
|
|
* Provides function pointers for the full OpenGLES 2.0 api. The
|
|
* api must be accessed this way and not by directly calling
|
|
* symbols of any system OpenGLES 2.0 api.
|
|
*
|
|
* Since: 1.12
|
|
* Stability: unstable
|
|
*/
|
|
typedef struct _CoglGLES2Vtable CoglGLES2Vtable;
|
|
|
|
struct _CoglGLES2Vtable
|
|
{
|
|
/*< private >*/
|
|
#define COGL_EXT_BEGIN(name, \
|
|
min_gl_major, min_gl_minor, \
|
|
gles_availability, \
|
|
extension_suffixes, extension_names)
|
|
|
|
#define COGL_EXT_FUNCTION(ret, name, args) \
|
|
ret (* name) args;
|
|
|
|
#define COGL_EXT_END()
|
|
|
|
#include <cogl/gl-prototypes/cogl-gles2-functions.h>
|
|
|
|
#undef COGL_EXT_BEGIN
|
|
#undef COGL_EXT_FUNCTION
|
|
#undef COGL_EXT_END
|
|
};
|
|
|
|
uint32_t
|
|
_cogl_gles2_context_error_quark (void);
|
|
|
|
/**
|
|
* COGL_GLES2_CONTEXT_ERROR:
|
|
*
|
|
* An error domain for runtime exceptions relating to the
|
|
* cogl_gles2_context api.
|
|
*
|
|
* Since: 2.0
|
|
* Stability: unstable
|
|
*/
|
|
#define COGL_GLES2_CONTEXT_ERROR (_cogl_gles2_context_error_quark ())
|
|
|
|
/**
|
|
* CoglGLES2ContextError:
|
|
* @COGL_GLES2_CONTEXT_ERROR_UNSUPPORTED: Creating GLES2 contexts
|
|
* isn't supported. Applications should use cogl_has_feature() to
|
|
* check for the %COGL_FEATURE_ID_GLES2_CONTEXT.
|
|
* @COGL_GLES2_CONTEXT_ERROR_DRIVER: An underlying driver error
|
|
* occured.
|
|
*
|
|
* Error codes that relate to the cogl_gles2_context api.
|
|
*/
|
|
typedef enum { /*< prefix=COGL_GLES2_CONTEXT_ERROR >*/
|
|
COGL_GLES2_CONTEXT_ERROR_UNSUPPORTED,
|
|
COGL_GLES2_CONTEXT_ERROR_DRIVER
|
|
} CoglGLES2ContextError;
|
|
|
|
/**
|
|
* cogl_gles2_context_new:
|
|
* @ctx: A #CoglContext
|
|
* @error: A pointer to a #CoglError for returning exceptions
|
|
*
|
|
* Allocates a new OpenGLES 2.0 context that can be used to render to
|
|
* #CoglOffscreen framebuffers (Rendering to #CoglOnscreen
|
|
* framebuffers is not currently supported).
|
|
*
|
|
* To actually access the OpenGLES 2.0 api itself you need to use
|
|
* cogl_gles2_context_get_vtable(). You should not try to directly link
|
|
* to and use the symbols provided by the a system OpenGLES 2.0
|
|
* driver.
|
|
*
|
|
* Once you have allocated an OpenGLES 2.0 context you can make it
|
|
* current using cogl_push_gles2_context(). For those familiar with
|
|
* using the EGL api, this serves a similar purpose to eglMakeCurrent.
|
|
*
|
|
* <note>Before using this api applications can check for OpenGLES 2.0
|
|
* api support by checking for %COGL_FEATURE_ID_GLES2_CONTEXT support
|
|
* with cogl_has_feature(). This function will return %FALSE and
|
|
* return an %COGL_GLES2_CONTEXT_ERROR_UNSUPPORTED error if the
|
|
* feature isn't available.</note>
|
|
*
|
|
* Since: 2.0
|
|
* Return value: A newly allocated #CoglGLES2Context or %NULL if there
|
|
* was an error and @error will be updated in that case.
|
|
* Stability: unstable
|
|
*/
|
|
CoglGLES2Context *
|
|
cogl_gles2_context_new (CoglContext *ctx, CoglError **error);
|
|
|
|
/**
|
|
* cogl_gles2_context_get_vtable:
|
|
* @gles2_ctx: A #CoglGLES2Context allocated with
|
|
* cogl_gles2_context_new()
|
|
*
|
|
* Queries the OpenGLES 2.0 api function pointers that should be
|
|
* used for rendering with the given @gles2_ctx.
|
|
*
|
|
* <note>You should not try to directly link to and use the symbols
|
|
* provided by any system OpenGLES 2.0 driver.</note>
|
|
*
|
|
* Since: 2.0
|
|
* Return value: A pointer to a #CoglGLES2Vtable providing pointers
|
|
* to functions for the full OpenGLES 2.0 api.
|
|
* Stability: unstable
|
|
*/
|
|
const CoglGLES2Vtable *
|
|
cogl_gles2_context_get_vtable (CoglGLES2Context *gles2_ctx);
|
|
|
|
/**
|
|
* cogl_push_gles2_context:
|
|
* @ctx: A #CoglContext
|
|
* @gles2_ctx: A #CoglGLES2Context allocated with
|
|
* cogl_gles2_context_new()
|
|
* @read_buffer: A #CoglFramebuffer to access to read operations
|
|
* such as glReadPixels. (must be a #CoglOffscreen
|
|
* framebuffer currently)
|
|
* @write_buffer: A #CoglFramebuffer to access for drawing operations
|
|
* such as glDrawArrays. (must be a #CoglOffscreen
|
|
* framebuffer currently)
|
|
* @error: A pointer to a #CoglError for returning exceptions
|
|
*
|
|
* Pushes the given @gles2_ctx onto a stack associated with @ctx so
|
|
* that the OpenGLES 2.0 api can be used instead of the Cogl
|
|
* rendering apis to read and write to the specified framebuffers.
|
|
*
|
|
* Usage of the api available through a #CoglGLES2Vtable is only
|
|
* allowed between cogl_push_gles2_context() and
|
|
* cogl_pop_gles2_context() calls.
|
|
*
|
|
* If there is a runtime problem with switching over to the given
|
|
* @gles2_ctx then this function will return %FALSE and return
|
|
* an error through @error.
|
|
*
|
|
* Since: 2.0
|
|
* Return value: %TRUE if operation was successfull or %FALSE
|
|
* otherwise and @error will be updated.
|
|
* Stability: unstable
|
|
*/
|
|
CoglBool
|
|
cogl_push_gles2_context (CoglContext *ctx,
|
|
CoglGLES2Context *gles2_ctx,
|
|
CoglFramebuffer *read_buffer,
|
|
CoglFramebuffer *write_buffer,
|
|
CoglError **error);
|
|
|
|
/**
|
|
* cogl_pop_gles2_context:
|
|
* @ctx: A #CoglContext
|
|
*
|
|
* Restores the previously active #CoglGLES2Context if there
|
|
* were nested calls to cogl_push_gles2_context() or otherwise
|
|
* restores the ability to render with the Cogl api instead
|
|
* of OpenGLES 2.0.
|
|
*
|
|
* The behaviour is undefined if calls to cogl_pop_gles2_context()
|
|
* are not balenced with the number of corresponding calls to
|
|
* cogl_push_gles2_context().
|
|
*
|
|
* Since: 2.0
|
|
* Stability: unstable
|
|
*/
|
|
void
|
|
cogl_pop_gles2_context (CoglContext *ctx);
|
|
|
|
/**
|
|
* cogl_gles2_get_current_vtable:
|
|
*
|
|
* Returns the OpenGL ES 2.0 api vtable for the currently pushed
|
|
* #CoglGLES2Context (last pushed with cogl_push_gles2_context()) or
|
|
* %NULL if no #CoglGLES2Context has been pushed.
|
|
*
|
|
* Return value: The #CoglGLES2Vtable for the currently pushed
|
|
* #CoglGLES2Context or %NULL if none has been pushed.
|
|
* Since: 2.0
|
|
* Stability: unstable
|
|
*/
|
|
CoglGLES2Vtable *
|
|
cogl_gles2_get_current_vtable (void);
|
|
|
|
/**
|
|
* cogl_gles2_texture_2d_new_from_handle:
|
|
* @ctx: A #CoglContext
|
|
* @gles2_ctx: A #CoglGLES2Context allocated with
|
|
* cogl_gles2_context_new()
|
|
* @handle: An OpenGL ES 2.0 texture handle created with
|
|
* glGenTextures()
|
|
* @width: Width of the texture to allocate
|
|
* @height: Height of the texture to allocate
|
|
* @internal_format: The format of the texture
|
|
* @error: A #CoglError for exceptions
|
|
*
|
|
* Creates a #CoglTexture2D from an OpenGL ES 2.0 texture handle that
|
|
* was created within the given @gles2_ctx via glGenTextures(). The
|
|
* texture needs to have been associated with the GL_TEXTURE_2D target.
|
|
*
|
|
* <note>This interface is only intended for sharing textures to read
|
|
* from. The behaviour is undefined if the texture is modified using
|
|
* the Cogl api.</note>
|
|
*
|
|
* <note>Applications should only pass this function handles that were
|
|
* created via a #CoglGLES2Vtable or via libcogl-gles2 and not pass
|
|
* handles created directly using the system's native libGLESv2
|
|
* api.</note>
|
|
*
|
|
* Since: 2.0
|
|
* Stability: unstable
|
|
*/
|
|
CoglTexture2D *
|
|
cogl_gles2_texture_2d_new_from_handle (CoglContext *ctx,
|
|
CoglGLES2Context *gles2_ctx,
|
|
unsigned int handle,
|
|
int width,
|
|
int height,
|
|
CoglPixelFormat internal_format,
|
|
CoglError **error);
|
|
|
|
/**
|
|
* cogl_gles2_texture_get_handle:
|
|
* @texture: A #CoglTexture
|
|
* @handle: A return location for an OpenGL ES 2.0 texture handle
|
|
* @target: A return location for an OpenGL ES 2.0 texture target
|
|
*
|
|
* Gets an OpenGL ES 2.0 texture handle for a #CoglTexture that can
|
|
* then be referenced by a #CoglGLES2Context. As well as returning
|
|
* a texture handle the texture's target (such as GL_TEXTURE_2D) is
|
|
* also returned.
|
|
*
|
|
* If the #CoglTexture can not be shared with a #CoglGLES2Context then
|
|
* this function will return %FALSE.
|
|
*
|
|
* This api does not affect the lifetime of the CoglTexture and you
|
|
* must take care not to reference the returned handle after the
|
|
* original texture has been freed.
|
|
*
|
|
* <note>This interface is only intended for sharing textures to read
|
|
* from. The behaviour is undefined if the texture is modified by a
|
|
* GLES2 context.</note>
|
|
*
|
|
* <note>This function will only return %TRUE for low-level
|
|
* #CoglTexture<!-- -->s such as #CoglTexture2D or #CoglTexture3D but
|
|
* not for high level meta textures such as
|
|
* #CoglTexture2DSliced</note>
|
|
*
|
|
* <note>The handle returned should not be passed directly to a system
|
|
* OpenGL ES 2.0 library, the handle is only intended to be used via
|
|
* a #CoglGLES2Vtable or via libcogl-gles2.</note>
|
|
*
|
|
* Return value: %TRUE if a handle and target could be returned
|
|
* otherwise %FALSE is returned.
|
|
* Since: 2.0
|
|
* Stability: unstable
|
|
*/
|
|
CoglBool
|
|
cogl_gles2_texture_get_handle (CoglTexture *texture,
|
|
unsigned int *handle,
|
|
unsigned int *target);
|
|
|
|
/**
|
|
* cogl_is_gles2_context:
|
|
* @object: A #CoglObject pointer
|
|
*
|
|
* Gets whether the given object references a #CoglGLES2Context.
|
|
*
|
|
* Return value: %TRUE if the object references a #CoglGLES2Context
|
|
* and %FALSE otherwise.
|
|
* Since: 2.0
|
|
* Stability: unstable
|
|
*/
|
|
CoglBool
|
|
cogl_is_gles2_context (void *object);
|
|
|
|
COGL_END_DECLS
|
|
|
|
/* The gobject introspection scanner seems to parse public headers in
|
|
* isolation which means we need to be extra careful about how we
|
|
* define and undefine __COGL_H_INSIDE__ used to detect when internal
|
|
* headers are incorrectly included by developers. In the gobject
|
|
* introspection case we have to manually define __COGL_H_INSIDE__ as
|
|
* a commandline argument for the scanner which means we must be
|
|
* careful not to undefine it in a header...
|
|
*/
|
|
#ifdef __COGL_MUST_UNDEF_COGL_H_INSIDE__
|
|
#undef __COGL_H_INSIDE__
|
|
#undef __COGL_MUST_UNDEF_COGL_H_INSIDE__
|
|
#endif
|
|
|
|
#endif /* __COGL_GLES2_H__ */
|
|
|