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Add an internal _cogl_bitmap_new_from_buffer

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This function creates a CoglBitmap which internally references a
CoglBuffer. The map and unmap functions will divert to mapping the
buffer. There are also now bind and unbind functions which should be
used instead of map and unmap whenever the data doesn't need to be
read from the CPU but will instead be passed to GL for packing or
unpacking. For bitmaps created from buffers this just binds the
bitmap.

cogl_texture_new_from_buffer now just uses this function to wrap the
buffer in a bitmap rather than trying to bind the buffer
immediately. This means that the buffer will be bound only at the
point right before the texture data is uploaded.

This approach means that using a pixel array will take the fastest
upload route if possible, but can still fallback to copying the data
by mapping the buffer if some conversion is needed. Previously it
would just crash in this case because the texture functions were all
passed a NULL pointer.

http://bugzilla.clutter-project.org/show_bug.cgi?id=2112
This commit is contained in:
Neil Roberts 2010-07-15 13:05:55 +01:00
parent e5dc645753
commit 4eca571a32
5 changed files with 256 additions and 130 deletions
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25
cogl/cogl-bitmap-private.h
View File

@ -82,6 +82,17 @@ _cogl_bitmap_new_shared (CoglBitmap *shared_bmp,
int height,
int rowstride);
/* This creates a cogl bitmap that internally references a pixel
array. The data is not copied. _cogl_bitmap_map will divert to
mapping the pixel array */
CoglBitmap *
_cogl_bitmap_new_from_buffer (CoglBuffer *buffer,
CoglPixelFormat format,
int width,
int height,
int rowstride,
int offset);
gboolean
_cogl_bitmap_can_convert (CoglPixelFormat src, CoglPixelFormat dst);
@ -173,4 +184,18 @@ _cogl_bitmap_map (CoglBitmap *bitmap,
void
_cogl_bitmap_unmap (CoglBitmap *bitmap);
/* These two are replacements for map and unmap that should used when
the pointer is going to be passed to GL for pixel packing or
unpacking. The address might not be valid for reading if the bitmap
was created with new_from_buffer but it will however be good to
pass to glTexImage2D for example. The access should be READ for
unpacking and WRITE for packing. It can not be both */
guint8 *
_cogl_bitmap_bind (CoglBitmap *bitmap,
CoglBufferAccess access,
CoglBufferMapHint hints);
void
_cogl_bitmap_unbind (CoglBitmap *bitmap);
#endif /* __COGL_BITMAP_H */

139
cogl/cogl-bitmap.c
View File

@ -28,6 +28,7 @@
#include "cogl.h"
#include "cogl-internal.h"
#include "cogl-bitmap-private.h"
#include "cogl-buffer-private.h"
#include <string.h>
@ -44,10 +45,15 @@ struct _CoglBitmap
void *destroy_fn_data;
gboolean mapped;
gboolean bound;
/* If this is non-null then 'data' is ignored and instead it is
fetched from this shared bitmap. */
CoglBitmap *shared_bmp;
/* If this is non-null then 'data' is treated as an offset into the
buffer and map will divert to mapping the buffer */
CoglBuffer *buffer;
};
static void _cogl_bitmap_free (CoglBitmap *bmp);
@ -58,6 +64,7 @@ static void
_cogl_bitmap_free (CoglBitmap *bmp)
{
g_assert (!bmp->mapped);
g_assert (!bmp->bound);
if (bmp->destroy_fn)
bmp->destroy_fn (bmp->data, bmp->destroy_fn_data);
@ -65,6 +72,9 @@ _cogl_bitmap_free (CoglBitmap *bmp)
if (bmp->shared_bmp)
cogl_object_unref (bmp->shared_bmp);
if (bmp->buffer)
cogl_object_unref (bmp->buffer);
g_slice_free (CoglBitmap, bmp);
}
@ -237,7 +247,9 @@ _cogl_bitmap_new_from_data (guint8 *data,
bmp->destroy_fn = destroy_fn;
bmp->destroy_fn_data = destroy_fn_data;
bmp->mapped = FALSE;
bmp->bound = FALSE;
bmp->shared_bmp = NULL;
bmp->buffer = NULL;
return _cogl_bitmap_object_new (bmp);
}
@ -284,6 +296,32 @@ cogl_bitmap_new_from_file (const char *filename,
return bmp;
}
CoglBitmap *
_cogl_bitmap_new_from_buffer (CoglBuffer *buffer,
CoglPixelFormat format,
int width,
int height,
int rowstride,
int offset)
{
CoglBitmap *bmp;
g_return_val_if_fail (cogl_is_buffer (buffer), NULL);
bmp = _cogl_bitmap_new_from_data (NULL, /* data */
format,
width,
height,
rowstride,
NULL, /* destroy_fn */
NULL /* destroy_fn_data */);
bmp->buffer = cogl_object_ref (buffer);
bmp->data = GINT_TO_POINTER (offset);
return bmp;
}
CoglPixelFormat
_cogl_bitmap_get_format (CoglBitmap *bitmap)
{
@ -331,11 +369,32 @@ _cogl_bitmap_map (CoglBitmap *bitmap,
return _cogl_bitmap_map (bitmap->shared_bmp, access, hints);
g_assert (!bitmap->mapped);
bitmap->mapped = TRUE;
/* Currently the bitmap is always in regular memory so we can just
directly return the pointer */
return bitmap->data;
if (bitmap->buffer)
{
guint8 *data = cogl_buffer_map (bitmap->buffer,
access,
hints);
COGL_NOTE (BITMAP, "A pixel array is being mapped from a bitmap. This "
"usually means that some conversion on the pixel array is "
"needed so a sub-optimal format is being used.");
if (data)
{
bitmap->mapped = TRUE;
return data + GPOINTER_TO_INT (bitmap->data);
}
else
return NULL;
}
else
{
bitmap->mapped = TRUE;
return bitmap->data;
}
}
void
@ -348,6 +407,74 @@ _cogl_bitmap_unmap (CoglBitmap *bitmap)
g_assert (bitmap->mapped);
bitmap->mapped = FALSE;
/* Currently the bitmap is always in regular memory so we don't need
to do anything */
if (bitmap->buffer)
cogl_buffer_unmap (bitmap->buffer);
}
guint8 *
_cogl_bitmap_bind (CoglBitmap *bitmap,
CoglBufferAccess access,
CoglBufferMapHint hints)
{
guint8 *ptr;
/* Divert to another bitmap if this data is shared */
if (bitmap->shared_bmp)
return _cogl_bitmap_bind (bitmap->shared_bmp, access, hints);
g_assert (!bitmap->bound);
/* If the bitmap wasn't created from a buffer then the
implementation of bind is the same as map */
if (bitmap->buffer == NULL)
{
guint8 *data = _cogl_bitmap_map (bitmap, access, hints);
if (data)
bitmap->bound = TRUE;
return data;
}
bitmap->bound = TRUE;
/* If buffer is using a malloc fallback then we'll just use the
pointer directly */
if (COGL_BUFFER_FLAG_IS_SET (bitmap->buffer, BUFFER_OBJECT))
{
ptr = NULL;
if (access == COGL_BUFFER_ACCESS_READ)
_cogl_buffer_bind (bitmap->buffer,
COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK);
else if (access == COGL_BUFFER_ACCESS_WRITE)
_cogl_buffer_bind (bitmap->buffer,
COGL_BUFFER_BIND_TARGET_PIXEL_PACK);
else
g_assert_not_reached ();
}
else
ptr = bitmap->buffer->data;
/* The data pointer actually stores the offset */
return GPOINTER_TO_INT (bitmap->data) + ptr;
}
void
_cogl_bitmap_unbind (CoglBitmap *bitmap)
{
/* Divert to another bitmap if this data is shared */
if (bitmap->shared_bmp)
return _cogl_bitmap_unbind (bitmap->shared_bmp);
g_assert (bitmap->bound);
bitmap->bound = FALSE;
/* If the bitmap wasn't created from a pixel array then the
implementation of unbind is the same as unmap */
if (bitmap->buffer)
{
if (COGL_BUFFER_FLAG_IS_SET (bitmap->buffer, BUFFER_OBJECT))
_cogl_buffer_unbind (bitmap->buffer);
}
else
_cogl_bitmap_unmap (bitmap);
}

37
cogl/cogl-texture.c
View File

@ -560,6 +560,7 @@ cogl_texture_new_from_buffer_EXP (CoglHandle buffer,
CoglHandle texture;
CoglBuffer *cogl_buffer;
CoglPixelArray *pixel_array;
CoglBitmap *bmp;
g_return_val_if_fail (cogl_is_buffer (buffer), COGL_INVALID_HANDLE);
@ -588,36 +589,16 @@ cogl_texture_new_from_buffer_EXP (CoglHandle buffer,
return COGL_INVALID_HANDLE;
}
#if !defined (COGL_HAS_GLES)
if (cogl_features_available (COGL_FEATURE_PBOS))
{
CoglBitmap *bmp;
/* Wrap the buffer into a bitmap */
bmp = _cogl_bitmap_new_from_buffer (cogl_buffer,
format,
width, height,
rowstride,
offset);
/* Wrap the data into a bitmap */
bmp = _cogl_bitmap_new_from_data (GUINT_TO_POINTER (offset),
format,
width, height,
rowstride,
NULL, NULL);
texture = cogl_texture_new_from_bitmap (bmp, flags, internal_format);
_cogl_buffer_bind (cogl_buffer,
COGL_BUFFER_BIND_TARGET_PIXEL_UNPACK);
texture = cogl_texture_new_from_bitmap (bmp, flags, internal_format);
_cogl_buffer_unbind (cogl_buffer);
cogl_object_unref (bmp);
}
else
#endif
{
texture = cogl_texture_new_from_data (width,
height,
flags,
format,
internal_format,
rowstride,
cogl_buffer->data);
}
cogl_object_unref (bmp);
return texture;
}

106
cogl/driver/gl/cogl-texture-driver.c
View File

@ -154,29 +154,27 @@ _cogl_texture_driver_upload_subregion_to_gl (GLenum gl_target,
GLuint source_gl_type)
{
guint8 *data;
int bpp = _cogl_get_format_bpp (_cogl_bitmap_get_format (source_bmp));
if ((data = _cogl_bitmap_map (source_bmp, COGL_BUFFER_ACCESS_READ, 0)))
{
int bpp = _cogl_get_format_bpp (_cogl_bitmap_get_format (source_bmp));
data = _cogl_bitmap_bind (source_bmp, COGL_BUFFER_ACCESS_READ, 0);
/* Setup gl alignment to match rowstride and top-left corner */
prep_gl_for_pixels_upload_full (_cogl_bitmap_get_rowstride (source_bmp),
0,
src_x,
src_y,
bpp);
/* Setup gl alignment to match rowstride and top-left corner */
prep_gl_for_pixels_upload_full (_cogl_bitmap_get_rowstride (source_bmp),
0,
src_x,
src_y,
bpp);
_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
GE( glTexSubImage2D (gl_target, 0,
dst_x, dst_y,
width, height,
source_gl_format,
source_gl_type,
data) );
GE( glTexSubImage2D (gl_target, 0,
dst_x, dst_y,
width, height,
source_gl_format,
source_gl_type,
data) );
_cogl_bitmap_unmap (source_bmp);
}
_cogl_bitmap_unbind (source_bmp);
}
void
@ -189,28 +187,26 @@ _cogl_texture_driver_upload_to_gl (GLenum gl_target,
GLuint source_gl_type)
{
guint8 *data;
int bpp = _cogl_get_format_bpp (_cogl_bitmap_get_format (source_bmp));
if ((data = _cogl_bitmap_map (source_bmp, COGL_BUFFER_ACCESS_READ, 0)))
{
int bpp = _cogl_get_format_bpp (_cogl_bitmap_get_format (source_bmp));
data = _cogl_bitmap_bind (source_bmp, COGL_BUFFER_ACCESS_READ, 0);
/* Setup gl alignment to match rowstride and top-left corner */
prep_gl_for_pixels_upload_full (_cogl_bitmap_get_rowstride (source_bmp),
0, 0, 0, bpp);
/* Setup gl alignment to match rowstride and top-left corner */
prep_gl_for_pixels_upload_full (_cogl_bitmap_get_rowstride (source_bmp),
0, 0, 0, bpp);
_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
GE( glTexImage2D (gl_target, 0,
internal_gl_format,
_cogl_bitmap_get_width (source_bmp),
_cogl_bitmap_get_height (source_bmp),
0,
source_gl_format,
source_gl_type,
data) );
GE( glTexImage2D (gl_target, 0,
internal_gl_format,
_cogl_bitmap_get_width (source_bmp),
_cogl_bitmap_get_height (source_bmp),
0,
source_gl_format,
source_gl_type,
data) );
_cogl_bitmap_unmap (source_bmp);
}
_cogl_bitmap_unbind (source_bmp);
}
void
@ -225,34 +221,32 @@ _cogl_texture_driver_upload_to_gl_3d (GLenum gl_target,
GLuint source_gl_type)
{
guint8 *data;
int bpp = _cogl_get_format_bpp (_cogl_bitmap_get_format (source_bmp));
_COGL_GET_CONTEXT (ctx, NO_RETVAL);
if ((data = _cogl_bitmap_map (source_bmp, COGL_BUFFER_ACCESS_READ, 0)))
{
int bpp = _cogl_get_format_bpp (_cogl_bitmap_get_format (source_bmp));
data = _cogl_bitmap_bind (source_bmp, COGL_BUFFER_ACCESS_READ, 0);
/* Setup gl alignment to match rowstride and top-left corner */
prep_gl_for_pixels_upload_full (_cogl_bitmap_get_rowstride (source_bmp),
(_cogl_bitmap_get_height (source_bmp) /
depth),
0, 0, bpp);
/* Setup gl alignment to match rowstride and top-left corner */
prep_gl_for_pixels_upload_full (_cogl_bitmap_get_rowstride (source_bmp),
(_cogl_bitmap_get_height (source_bmp) /
depth),
0, 0, bpp);
_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
GE( glTexImage3D (gl_target,
0, /* level */
internal_gl_format,
_cogl_bitmap_get_width (source_bmp),
height,
depth,
0,
source_gl_format,
source_gl_type,
data) );
GE( glTexImage3D (gl_target,
0, /* level */
internal_gl_format,
_cogl_bitmap_get_width (source_bmp),
height,
depth,
0,
source_gl_format,
source_gl_type,
data) );
_cogl_bitmap_unmap (source_bmp);
}
_cogl_bitmap_unbind (source_bmp);
}
gboolean

79
cogl/driver/gles/cogl-texture-driver.c
View File

@ -150,19 +150,18 @@ _cogl_texture_driver_upload_subregion_to_gl (GLenum gl_target,
0, 0,
width, height);
if ((data = _cogl_bitmap_map (slice_bmp, COGL_BUFFER_ACCESS_READ, 0)))
{
_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
data = _cogl_bitmap_bind (slice_bmp, COGL_BUFFER_ACCESS_READ, 0);
GE( glTexSubImage2D (gl_target, 0,
dst_x, dst_y,
width, height,
source_gl_format,
source_gl_type,
data) );
_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
_cogl_bitmap_unmap (slice_bmp);
}
GE( glTexSubImage2D (gl_target, 0,
dst_x, dst_y,
width, height,
source_gl_format,
source_gl_type,
data) );
_cogl_bitmap_unbind (slice_bmp);
cogl_object_unref (slice_bmp);
}
@ -209,18 +208,17 @@ _cogl_texture_driver_upload_to_gl (GLenum gl_target,
_cogl_bind_gl_texture_transient (gl_target, gl_handle, is_foreign);
if ((data = _cogl_bitmap_map (bmp, COGL_BUFFER_ACCESS_READ, 0)))
{
GE( glTexImage2D (gl_target, 0,
internal_gl_format,
bmp_width, bmp_height,
0,
source_gl_format,
source_gl_type,
data) );
data = _cogl_bitmap_bind (bmp, COGL_BUFFER_ACCESS_READ, 0);
_cogl_bitmap_unmap (bmp);
}
GE( glTexImage2D (gl_target, 0,
internal_gl_format,
bmp_width, bmp_height,
0,
source_gl_format,
source_gl_type,
data) );
_cogl_bitmap_unbind (bmp);
cogl_object_unref (bmp);
}
@ -289,29 +287,30 @@ _cogl_texture_driver_upload_to_gl_3d (GLenum gl_target,
bmp_width,
bmp_height);
if ((data = _cogl_bitmap_map (bmp,
COGL_BUFFER_ACCESS_READ, 0)))
{
GE( glTexSubImage3D (gl_target,
0, /* level */
0, /* xoffset */
0, /* yoffset */
i, /* zoffset */
bmp_width, /* width */
height, /* height */
1, /* depth */
source_gl_format,
source_gl_type,
data) );
data = _cogl_bitmap_bind (bmp,
COGL_BUFFER_ACCESS_READ, 0);
_cogl_bitmap_unmap (bmp);
}
GE( glTexSubImage3D (gl_target,
0, /* level */
0, /* xoffset */
0, /* yoffset */
i, /* zoffset */
bmp_width, /* width */
height, /* height */
1, /* depth */
source_gl_format,
source_gl_type,
data) );
_cogl_bitmap_unbind (bmp);
}
cogl_object_unref (bmp);
}
else if ((data = _cogl_bitmap_map (source_bmp, COGL_BUFFER_ACCESS_READ, 0)))
else
{
data = _cogl_bitmap_bind (source_bmp, COGL_BUFFER_ACCESS_READ, 0);
_cogl_texture_driver_prep_gl_for_pixels_upload (rowstride, bpp);
GE( glTexImage3D (gl_target,
@ -325,7 +324,7 @@ _cogl_texture_driver_upload_to_gl_3d (GLenum gl_target,
source_gl_type,
data) );
_cogl_bitmap_unmap (source_bmp);
_cogl_bitmap_unbind (source_bmp);
}
}