mutter/cogl/cogl-bitmap-pixbuf.c
Robert Bragg 54735dec84 Switch use of primitive glib types to c99 equivalents
The coding style has for a long time said to avoid using redundant glib
data types such as gint or gchar etc because we feel that they make the
code look unnecessarily foreign to developers coming from outside of the
Gnome developer community.

Note: When we tried to find the historical rationale for the types we
just found that they were apparently only added for consistent syntax
highlighting which didn't seem that compelling.

Up until now we have been continuing to use some of the platform
specific type such as gint{8,16,32,64} and gsize but this patch switches
us over to using the standard c99 equivalents instead so we can further
ensure that our code looks familiar to the widest range of C developers
who might potentially contribute to Cogl.

So instead of using the gint{8,16,32,64} and guint{8,16,32,64} types this
switches all Cogl code to instead use the int{8,16,32,64}_t and
uint{8,16,32,64}_t c99 types instead.

Instead of gsize we now use size_t

For now we are not going to use the c99 _Bool type and instead we have
introduced a new CoglBool type to use instead of gboolean.

Reviewed-by: Neil Roberts <neil@linux.intel.com>

(cherry picked from commit 5967dad2400d32ca6319cef6cb572e81bf2c15f0)
2012-08-06 14:27:39 +01:00

307 lines
8.6 KiB
C

/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2007,2008,2009 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/>.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-util.h"
#include "cogl-internal.h"
#include "cogl-bitmap-private.h"
#include "cogl-context-private.h"
#include <string.h>
#ifdef USE_QUARTZ
#include <ApplicationServices/ApplicationServices.h>
#elif defined(USE_GDKPIXBUF)
#include <gdk-pixbuf/gdk-pixbuf.h>
#endif
#ifdef USE_QUARTZ
CoglBool
_cogl_bitmap_get_size_from_file (const char *filename,
int *width,
int *height)
{
if (width)
*width = 0;
if (height)
*height = 0;
return TRUE;
}
/* the error does not contain the filename as the caller already has it */
CoglBitmap *
_cogl_bitmap_from_file (const char *filename,
GError **error)
{
CFURLRef url;
CGImageSourceRef image_source;
CGImageRef image;
int save_errno;
CFStringRef type;
size_t width, height, rowstride;
uint8_t *out_data;
CGColorSpaceRef color_space;
CGContextRef bitmap_context;
CoglBitmap *bmp;
_COGL_GET_CONTEXT (ctx, NULL);
g_assert (filename != NULL);
g_assert (error == NULL || *error == NULL);
url = CFURLCreateFromFileSystemRepresentation (NULL,
(guchar *) filename,
strlen (filename),
false);
image_source = CGImageSourceCreateWithURL (url, NULL);
save_errno = errno;
CFRelease (url);
if (image_source == NULL)
{
/* doesn't exist, not readable, etc. */
g_set_error_literal (error,
COGL_BITMAP_ERROR,
COGL_BITMAP_ERROR_FAILED,
g_strerror (save_errno));
return NULL;
}
/* Unknown images would be cleanly caught as zero width/height below, but try
* to provide better error message
*/
type = CGImageSourceGetType (image_source);
if (type == NULL)
{
CFRelease (image_source);
g_set_error_literal (error,
COGL_BITMAP_ERROR,
COGL_BITMAP_ERROR_UNKNOWN_TYPE,
"Unknown image type");
return NULL;
}
CFRelease (type);
image = CGImageSourceCreateImageAtIndex (image_source, 0, NULL);
CFRelease (image_source);
width = CGImageGetWidth (image);
height = CGImageGetHeight (image);
if (width == 0 || height == 0)
{
/* incomplete or corrupt */
CFRelease (image);
g_set_error_literal (error,
COGL_BITMAP_ERROR,
COGL_BITMAP_ERROR_CORRUPT_IMAGE,
"Image has zero width or height");
return NULL;
}
/* allocate buffer big enough to hold pixel data */
bmp = _cogl_bitmap_new_with_malloc_buffer (ctx,
width, height,
COGL_PIXEL_FORMAT_ARGB_8888);
rowstride = cogl_bitmap_get_rowstride (bmp);
out_data = _cogl_bitmap_map (bmp,
COGL_BUFFER_ACCESS_WRITE,
COGL_BUFFER_MAP_HINT_DISCARD);
/* render to buffer */
color_space = CGColorSpaceCreateWithName (kCGColorSpaceGenericRGB);
bitmap_context = CGBitmapContextCreate (out_data,
width, height, 8,
rowstride, color_space,
kCGImageAlphaPremultipliedFirst);
CGColorSpaceRelease (color_space);
{
const CGRect rect = {{0, 0}, {width, height}};
CGContextDrawImage (bitmap_context, rect, image);
}
CGImageRelease (image);
CGContextRelease (bitmap_context);
_cogl_bitmap_unmap (bmp);
/* store bitmap info */
return bmp;
}
#elif defined(USE_GDKPIXBUF)
CoglBool
_cogl_bitmap_get_size_from_file (const char *filename,
int *width,
int *height)
{
_COGL_RETURN_VAL_IF_FAIL (filename != NULL, FALSE);
if (gdk_pixbuf_get_file_info (filename, width, height) != NULL)
return TRUE;
return FALSE;
}
CoglBitmap *
_cogl_bitmap_from_file (const char *filename,
GError **error)
{
static CoglUserDataKey pixbuf_key;
GdkPixbuf *pixbuf;
CoglBool has_alpha;
GdkColorspace color_space;
CoglPixelFormat pixel_format;
int width;
int height;
int rowstride;
int bits_per_sample;
int n_channels;
CoglBitmap *bmp;
_COGL_GET_CONTEXT (ctx, NULL);
_COGL_RETURN_VAL_IF_FAIL (error == NULL || *error == NULL, FALSE);
/* Load from file using GdkPixbuf */
pixbuf = gdk_pixbuf_new_from_file (filename, error);
if (pixbuf == NULL)
return FALSE;
/* Get pixbuf properties */
has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
color_space = gdk_pixbuf_get_colorspace (pixbuf);
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
rowstride = gdk_pixbuf_get_rowstride (pixbuf);
bits_per_sample = gdk_pixbuf_get_bits_per_sample (pixbuf);
n_channels = gdk_pixbuf_get_n_channels (pixbuf);
/* According to current docs this should be true and so
* the translation to cogl pixel format below valid */
g_assert (bits_per_sample == 8);
if (has_alpha)
g_assert (n_channels == 4);
else
g_assert (n_channels == 3);
/* Translate to cogl pixel format */
switch (color_space)
{
case GDK_COLORSPACE_RGB:
/* The only format supported by GdkPixbuf so far */
pixel_format = has_alpha ?
COGL_PIXEL_FORMAT_RGBA_8888 :
COGL_PIXEL_FORMAT_RGB_888;
break;
default:
/* Ouch, spec changed! */
g_object_unref (pixbuf);
return FALSE;
}
/* We just use the data directly from the pixbuf so that we don't
have to copy to a seperate buffer. Note that Cogl is expected not
to read past the end of bpp*width on the last row even if the
rowstride is much larger so we don't need to worry about
GdkPixbuf's semantics that it may under-allocate the buffer. */
bmp = cogl_bitmap_new_for_data (ctx,
width,
height,
pixel_format,
rowstride,
gdk_pixbuf_get_pixels (pixbuf));
cogl_object_set_user_data (COGL_OBJECT (bmp),
&pixbuf_key,
pixbuf,
g_object_unref);
return bmp;
}
#else
#include "stb_image.c"
CoglBool
_cogl_bitmap_get_size_from_file (const char *filename,
int *width,
int *height)
{
if (width)
*width = 0;
if (height)
*height = 0;
return TRUE;
}
CoglBitmap *
_cogl_bitmap_from_file (const char *filename,
GError **error)
{
static CoglUserDataKey bitmap_data_key;
CoglBitmap *bmp;
int stb_pixel_format;
int width;
int height;
uint8_t *pixels;
_COGL_GET_CONTEXT (ctx, NULL);
_COGL_RETURN_VAL_IF_FAIL (error == NULL || *error == NULL, FALSE);
/* Load from file using stb */
pixels = stbi_load (filename,
&width, &height, &stb_pixel_format,
STBI_rgb_alpha);
if (pixels == NULL)
return FALSE;
/* Store bitmap info */
bmp = cogl_bitmap_new_for_data (ctx,
width, height,
COGL_PIXEL_FORMAT_RGBA_8888,
width * 4, /* rowstride */
pixels);
/* Register a destroy function so the pixel data will be freed
automatically when the bitmap object is destroyed */
cogl_object_set_user_data (COGL_OBJECT (bmp), &bitmap_data_key, pixels, free);
return bmp;
}
#endif