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osx: CGBitmapContextCreate can't make 24bpp, alphaless offscreen pixmaps

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While loading a JPEG from disk (with clutter_texture_new_from_file),
I got the following:

<Error>: CGBitmapContextCreate: unsupported parameter combination: 8
integer bits/component; 24 bits/pixel; 3-component colorspace;
kCGImageAlphaNone; 3072 bytes/row.
<Error>: CGContextDrawImage: invalid context

Looking around, I found that CGBitmapContextCreate can't make 24bpp
offscreen pixmaps without an alpha channel...

This fixes the bug, and seems to not break other things...

http://bugzilla.openedhand.com/show_bug.cgi?id=1159

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
This commit is contained in:
Tim Horton 2009-11-06 11:57:43 +00:00 committed by Emmanuele Bassi
parent 339b447075
commit 544543e249
1 changed files with 3 additions and 15 deletions
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16
cogl/cogl-bitmap-pixbuf.c
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@ -160,17 +160,7 @@ _cogl_bitmap_from_file (CoglBitmap *bmp,
/* allocate buffer big enough to hold pixel data */ /* allocate buffer big enough to hold pixel data */
size_t rowstride; size_t rowstride;
CGBitmapInfo bitmap_info = CGImageGetBitmapInfo (image);
if ((bitmap_info & kCGBitmapAlphaInfoMask) == kCGImageAlphaNone)
{
bitmap_info = kCGImageAlphaNone;
rowstride = 3 * width;
}
else
{
bitmap_info = kCGImageAlphaPremultipliedFirst;
rowstride = 4 * width; rowstride = 4 * width;
}
guint8 *out_data = g_malloc0 (height * rowstride); guint8 *out_data = g_malloc0 (height * rowstride);
/* render to buffer */ /* render to buffer */
@ -178,7 +168,7 @@ _cogl_bitmap_from_file (CoglBitmap *bmp,
CGContextRef bitmap_context = CGBitmapContextCreate (out_data, CGContextRef bitmap_context = CGBitmapContextCreate (out_data,
width, height, 8, width, height, 8,
rowstride, color_space, rowstride, color_space,
bitmap_info); kCGImageAlphaPremultipliedFirst);
CGColorSpaceRelease (color_space); CGColorSpaceRelease (color_space);
const CGRect rect = {{0, 0}, {width, height}}; const CGRect rect = {{0, 0}, {width, height}};
@ -189,9 +179,7 @@ _cogl_bitmap_from_file (CoglBitmap *bmp,
/* store bitmap info */ /* store bitmap info */
bmp->data = out_data; bmp->data = out_data;
bmp->format = bitmap_info == kCGImageAlphaPremultipliedFirst bmp->format = COGL_PIXEL_FORMAT_ARGB_8888;
? COGL_PIXEL_FORMAT_ARGB_8888
: COGL_PIXEL_FORMAT_RGB_888;
bmp->width = width; bmp->width = width;
bmp->height = height; bmp->height = height;
bmp->rowstride = rowstride; bmp->rowstride = rowstride;