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Add a public cogl_framebuffer_read_pixels_into_bitmap

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This adds a public function to read pixels from a framebuffer into a
CoglBitmap. This replaces the internal function
_cogl_read_pixels_with_rowstride because a CoglBitmap contains a
rowstride so it can be used for the same purpose. A CoglBitmap already
has public API to make one that points to a CoglPixelBuffer so this
function can be used to read pixels into a PBO. It also avoids the
need to push the framebuffer on to the context's stack so it provides
a function which can be used in the 2.0 API after the stack is
removed.

Reviewed-by: Robert Bragg <robert@linux.intel.com>
This commit is contained in:
Neil Roberts
2012-02-25 19:23:51 +00:00
parent 2501899044
commit 10a38bb14f
9 changed files with 328 additions and 226 deletions
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25
cogl/cogl-texture.c
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@ -1015,6 +1015,7 @@ get_texture_bits_via_offscreen (CoglTexture *texture,
{
CoglOffscreen *offscreen;
CoglFramebuffer *framebuffer;
CoglBitmap *bitmap;
_COGL_GET_CONTEXT (ctx, FALSE);
@ -1031,19 +1032,17 @@ get_texture_bits_via_offscreen (CoglTexture *texture,
framebuffer = COGL_FRAMEBUFFER (offscreen);
if (!cogl_framebuffer_allocate (framebuffer, NULL))
{
cogl_object_unref (framebuffer);
return FALSE;
}
cogl_push_framebuffer (framebuffer);
_cogl_read_pixels_with_rowstride (x, y, width, height,
COGL_READ_PIXELS_COLOR_BUFFER,
dst_format, dst_bits, dst_rowstride);
cogl_pop_framebuffer ();
bitmap = _cogl_bitmap_new_from_data (dst_bits,
dst_format,
width, height,
dst_rowstride,
NULL, /* destroy_fn */
NULL /* destroy_fn_data */);
cogl_framebuffer_read_pixels_into_bitmap (framebuffer,
x, y,
COGL_READ_PIXELS_COLOR_BUFFER,
bitmap);
cogl_object_unref (bitmap);
cogl_object_unref (framebuffer);