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Add a public cogl_bitmap_new_for_data

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This creates a CoglBitmap which points into an existing buffer in
system memory. That way it can be used to create a texture or to read
pixel data into. The function replaces the existing internal function
_cogl_bitmap_new_from_data but removes the destroy notify call back.
If the application wants notification of destruction it can just use
the cogl_object_set_user_data function as normal. Internally there is
now a convenience function to create a bitmap for system memory and
automatically free the buffer using that mechanism.

The name of the function is inspired by
cairo_image_surface_create_for_data which has similar semantics.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts
2012-03-13 14:46:18 +00:00
parent f65a895b4f
commit d18b59d9e6
14 changed files with 273 additions and 261 deletions
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20
cogl/cogl-bitmap-conversion.c
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@ -27,6 +27,7 @@
#include "cogl-private.h"
#include "cogl-bitmap-private.h"
#include "cogl-context-private.h"
#include <string.h>
@ -470,26 +471,17 @@ CoglBitmap *
_cogl_bitmap_convert (CoglBitmap *src_bmp,
CoglPixelFormat dst_format)
{
int dst_bpp;
int dst_rowstride;
guint8 *dst_data;
CoglBitmap *dst_bmp;
int width, height;
_COGL_GET_CONTEXT (ctx, NULL);
width = cogl_bitmap_get_width (src_bmp);
height = cogl_bitmap_get_height (src_bmp);
dst_bpp = _cogl_pixel_format_get_bytes_per_pixel (dst_format);
dst_rowstride = (sizeof (guint8) * dst_bpp * width + 3) & ~3;
/* Allocate a new buffer to hold converted data */
dst_data = g_malloc (height * dst_rowstride);
dst_bmp = _cogl_bitmap_new_from_data (dst_data,
dst_format,
width, height,
dst_rowstride,
(CoglBitmapDestroyNotify) g_free,
NULL);
dst_bmp = _cogl_bitmap_new_with_malloc_buffer (ctx,
width, height,
dst_format);
if (!_cogl_bitmap_convert_into_bitmap (src_bmp, dst_bmp))
{