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mutter/cogl/cogl-pixel-buffer.c
Emmanuele Bassi 72f4ddf532 Remove mentions of the FSF address 
Since using addresses that might change is something that finally
the FSF acknowledge as a plausible scenario (after changing address
twice), the license blurb in the source files should use the URI
for getting the license in case the library did not come with it.

Not that URIs cannot possibly change, but at least it's easier to
set up a redirection at the same place.

As a side note: this commit closes the oldes bug in Clutter's bug
report tool.

http://bugzilla.openedhand.com/show_bug.cgi?id=521
2010-03-01 12:56:10 +00:00

378 lines
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/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2010 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:
* Damien Lespiau <damien.lespiau@intel.com>
*/
/* For an overview of the functionality implemented here, please see
* cogl-pixel-buffer.h, which contains the gtk-doc section overview for the
* Pixel Buffers API.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-util.h"
#include "cogl-context.h"
#include "cogl-handle.h"
#include "cogl-pixel-buffer-private.h"
#include "cogl-pixel-buffer.h"
/*
* GL/GLES compatibility defines for the buffer API:
*/
#if defined (HAVE_COGL_GL)
#define glGenBuffers ctx->drv.pf_glGenBuffers
#define glBindBuffer ctx->drv.pf_glBindBuffer
#define glBufferData ctx->drv.pf_glBufferData
#define glBufferSubData ctx->drv.pf_glBufferSubData
#define glGetBufferSubData ctx->drv.pf_glGetBufferSubData
#define glDeleteBuffers ctx->drv.pf_glDeleteBuffers
#define glMapBuffer ctx->drv.pf_glMapBuffer
#define glUnmapBuffer ctx->drv.pf_glUnmapBuffer
#define glActiveTexture ctx->drv.pf_glActiveTexture
#define glClientActiveTexture ctx->drv.pf_glClientActiveTexture
#ifndef GL_PIXEL_UNPACK_BUFFER
#define GL_PIXEL_UNPACK_BUFFER GL_PIXEL_UNPACK_BUFFER_ARB
#endif
#ifndef GL_PIXEL_PACK_BUFFER
#define GL_PIXEL_PACK_BUFFER GL_PIXEL_PACK_BUFFER_ARB
#endif
#elif defined (HAVE_COGL_GLES2)
#include "../gles/cogl-gles2-wrapper.h"
#endif
static void
_cogl_pixel_buffer_free (CoglPixelBuffer *buffer);
#if !defined (COGL_HAS_GLES)
static const CoglBufferVtable
cogl_pixel_buffer_vtable;
#endif
static const CoglBufferVtable
cogl_malloc_pixel_buffer_vtable;
/* we don't want to use the stock COGL_HANDLE_DEFINE * for 2 reasons:
* - it defines already deprecated symbols
* - we want to suffix the public symbols by _EXP */
#define COGL_HANDLE_DEFINE_EXP(TypeName, type_name) \
\
static CoglHandleClass _cogl_##type_name##_class; \
\
GQuark \
_cogl_handle_##type_name##_get_type (void) \
{ \
static GQuark type = 0; \
if (!type) \
type = g_quark_from_static_string ("Cogl"#TypeName); \
return type; \
} \
\
static CoglHandle \
_cogl_##type_name##_handle_new (Cogl##TypeName *new_obj) \
{ \
CoglHandleObject *obj = (CoglHandleObject *)&new_obj->_parent;\
obj->ref_count = 1; \
\
obj->klass = &_cogl_##type_name##_class; \
if (!obj->klass->type) \
{ \
obj->klass->type = _cogl_handle_##type_name##_get_type ();\
obj->klass->virt_free = _cogl_##type_name##_free; \
} \
\
_COGL_HANDLE_DEBUG_NEW (TypeName, obj); \
return (CoglHandle) new_obj; \
} \
\
Cogl##TypeName * \
_cogl_##type_name##_pointer_from_handle (CoglHandle handle) \
{ \
return (Cogl##TypeName *) handle; \
} \
\
gboolean \
cogl_is_##type_name##_EXP (CoglHandle handle) \
{ \
CoglHandleObject *obj = (CoglHandleObject *)handle; \
\
if (handle == COGL_INVALID_HANDLE) \
return FALSE; \
\
return (obj->klass->type == \
_cogl_handle_##type_name##_get_type ()); \
}
COGL_HANDLE_DEFINE_EXP(PixelBuffer, pixel_buffer)
CoglHandle
cogl_pixel_buffer_new_EXP (unsigned int size)
{
CoglPixelBuffer *pixel_buffer = g_slice_new0 (CoglPixelBuffer);
CoglBuffer *buffer = COGL_BUFFER (pixel_buffer);
_COGL_GET_CONTEXT (ctx, COGL_INVALID_HANDLE);
/* parent's constructor */
_cogl_buffer_initialize (buffer,
size,
COGL_BUFFER_USAGE_HINT_TEXTURE,
COGL_BUFFER_UPDATE_HINT_STATIC);
/* malloc version only for GLES */
#if !defined (COGL_HAS_GLES)
if (cogl_features_available (COGL_FEATURE_PBOS))
{
/* PBOS */
buffer->vtable = &cogl_pixel_buffer_vtable;
GE( glGenBuffers (1, &buffer->gl_handle) );
COGL_BUFFER_SET_FLAG (buffer, BUFFER_OBJECT);
}
else
#endif
{
/* malloc fallback subclass */
buffer->vtable = &cogl_malloc_pixel_buffer_vtable;
/* create the buffer here as there's no point for a lazy allocation in
* the malloc case */
buffer->data = g_malloc (size);
}
pixel_buffer->flags = COGL_PIXEL_BUFFER_FLAG_NONE;
/* return COGL_INVALID_HANDLE; */
return _cogl_pixel_buffer_handle_new (pixel_buffer);
}
CoglHandle
cogl_pixel_buffer_new_for_size_EXP (unsigned int width,
unsigned int height,
CoglPixelFormat format,
unsigned int *rowstride)
{
CoglHandle buffer;
CoglPixelBuffer *pixel_buffer;
unsigned int stride;
/* creating a buffer to store "any" format does not make sense */
if (G_UNLIKELY (format == COGL_PIXEL_FORMAT_ANY))
return COGL_INVALID_HANDLE;
/* for now we fallback to cogl_pixel_buffer_new_EXP, later, we could ask
* libdrm a tiled buffer for instance */
stride = width * _cogl_get_format_bpp (format);
if (rowstride)
*rowstride = stride;
buffer = cogl_pixel_buffer_new_EXP (height * stride);
if (G_UNLIKELY (buffer == COGL_INVALID_HANDLE))
return COGL_INVALID_HANDLE;
pixel_buffer = COGL_PIXEL_BUFFER (buffer);
pixel_buffer->width = width;
pixel_buffer->height = height;
pixel_buffer->format = format;
pixel_buffer->stride = stride;
return buffer;
}
static void
_cogl_pixel_buffer_free (CoglPixelBuffer *buffer)
{
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
/* parent's destructor */
_cogl_buffer_fini (COGL_BUFFER (buffer));
GE( glDeleteBuffers (1, &(COGL_BUFFER (buffer)->gl_handle)) );
g_slice_free (CoglPixelBuffer, buffer);
}
#if !defined (COGL_HAS_GLES)
static guint8 *
_cogl_pixel_buffer_map (CoglBuffer *buffer,
CoglBufferAccess access)
{
CoglPixelBuffer *pixel_buffer = COGL_PIXEL_BUFFER (buffer);
GLenum gl_target;
guint8 *data;
_COGL_GET_CONTEXT (ctx, NULL);
/* we determine the target lazily, on the first map */
gl_target = GL_PIXEL_UNPACK_BUFFER;
pixel_buffer->gl_target = gl_target;
_cogl_buffer_bind (buffer, gl_target);
/* create an empty store if we don't have one yet. creating the store
* lazily allows the user of the CoglBuffer to set a hint before the
* store is created. */
if (!COGL_PIXEL_BUFFER_FLAG_IS_SET (pixel_buffer, STORE_CREATED))
{
GE( glBufferData (gl_target,
buffer->size,
NULL,
_cogl_buffer_hints_to_gl_enum (buffer->usage_hint,
buffer->update_hint)) );
COGL_PIXEL_BUFFER_SET_FLAG (pixel_buffer, STORE_CREATED);
}
GE_RET( data, glMapBuffer (gl_target,
_cogl_buffer_access_to_gl_enum (access)) );
if (data)
COGL_BUFFER_SET_FLAG (buffer, MAPPED);
_cogl_buffer_bind (NULL, gl_target);
return data;
}
static void
_cogl_pixel_buffer_unmap (CoglBuffer *buffer)
{
CoglPixelBuffer *pixel_buffer = COGL_PIXEL_BUFFER (buffer);
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
_cogl_buffer_bind (buffer, pixel_buffer->gl_target);
GE( glUnmapBuffer (pixel_buffer->gl_target) );
COGL_BUFFER_CLEAR_FLAG (buffer, MAPPED);
_cogl_buffer_bind (NULL, pixel_buffer->gl_target);
}
static gboolean
_cogl_pixel_buffer_set_data (CoglBuffer *buffer,
unsigned int offset,
const guint8 *data,
unsigned int size)
{
CoglPixelBuffer *pixel_buffer = COGL_PIXEL_BUFFER (buffer);
_COGL_GET_CONTEXT (ctx, FALSE);
pixel_buffer->gl_target = GL_PIXEL_UNPACK_BUFFER;
_cogl_buffer_bind (buffer, pixel_buffer->gl_target);
/* create an empty store if we don't have one yet. creating the store
* lazily allows the user of the CoglBuffer to set a hint before the
* store is created. */
if (!COGL_PIXEL_BUFFER_FLAG_IS_SET (pixel_buffer, STORE_CREATED))
{
GE( glBufferData (pixel_buffer->gl_target,
buffer->size,
NULL,
_cogl_buffer_hints_to_gl_enum (buffer->usage_hint,
buffer->update_hint)) );
COGL_PIXEL_BUFFER_SET_FLAG (pixel_buffer, STORE_CREATED);
}
GE( glBufferSubData (pixel_buffer->gl_target, offset, size, data) );
_cogl_buffer_bind (NULL, pixel_buffer->gl_target);
return TRUE;
}
#if 0
gboolean
cogl_pixel_buffer_set_region_EXP (CoglHandle buffer,
guint8 *data,
unsigned int src_width,
unsigned int src_height,
unsigned int src_rowstride,
unsigned int dst_x,
unsigned int dst_y)
{
if (!cogl_is_pixel_buffer (buffer))
return FALSE;
return TRUE;
}
#endif
static const CoglBufferVtable cogl_pixel_buffer_vtable =
{
_cogl_pixel_buffer_map,
_cogl_pixel_buffer_unmap,
_cogl_pixel_buffer_set_data,
};
#endif
/*
* Fallback path, buffer->data points to a malloc'ed buffer.
*/
static guint8 *
_cogl_malloc_pixel_buffer_map (CoglBuffer *buffer,
CoglBufferAccess access)
{
COGL_BUFFER_SET_FLAG (buffer, MAPPED);
return buffer->data;
}
static void
_cogl_malloc_pixel_buffer_unmap (CoglBuffer *buffer)
{
COGL_BUFFER_CLEAR_FLAG (buffer, MAPPED);
}
static gboolean
_cogl_malloc_pixel_buffer_set_data (CoglBuffer *buffer,
unsigned int offset,
const guint8 *data,
unsigned int size)
{
memcpy (buffer->data + offset, data, size);
return TRUE;
}
static const CoglBufferVtable cogl_malloc_pixel_buffer_vtable =
{
_cogl_malloc_pixel_buffer_map,
_cogl_malloc_pixel_buffer_unmap,
_cogl_malloc_pixel_buffer_set_data,
};
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