mutter/cogl/cogl-bitmap-pixbuf.c
Robert Bragg a0441778ad This re-licenses Cogl 1.18 under the MIT license
Since the Cogl 1.18 branch is actively maintained in parallel with the
master branch; this is a counter part to commit 1b83ef938fc16b which
re-licensed the master branch to use the MIT license.

This re-licensing is a follow up to the proposal that was sent to the
Cogl mailing list:
http://lists.freedesktop.org/archives/cogl/2013-December/001465.html

Note: there was a copyright assignment policy in place for Clutter (and
therefore Cogl which was part of Clutter at the time) until the 11th of
June 2010 and so we only checked the details after that point (commit
0bbf50f905)

For each file, authors were identified via this Git command:
$ git blame -p -C -C -C20 -M -M10  0bbf50f905..HEAD

We received blanket approvals for re-licensing all Red Hat and Collabora
contributions which reduced how many people needed to be contacted
individually:
- http://lists.freedesktop.org/archives/cogl/2013-December/001470.html
- http://lists.freedesktop.org/archives/cogl/2014-January/001536.html

Individual approval requests were sent to all the other identified authors
who all confirmed the re-license on the Cogl mailinglist:
http://lists.freedesktop.org/archives/cogl/2014-January

As well as updating the copyright header in all sources files, the
COPYING file has been updated to reflect the license change and also
document the other licenses used in Cogl such as the SGI Free Software
License B, version 2.0 and the 3-clause BSD license.

This patch was not simply cherry-picked from master; but the same
methodology was used to check the source files.
2014-02-22 02:02:53 +00:00

476 lines
13 KiB
C

/*
* Cogl
*
* A Low Level GPU Graphics and Utilities API
*
* Copyright (C) 2007,2008,2009 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-util.h"
#include "cogl-bitmap-private.h"
#include "cogl-context-private.h"
#include "cogl-private.h"
#include "cogl-error-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 (CoglContext *ctx,
const char *filename,
CoglError **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;
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. */
_cogl_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);
_cogl_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);
_cogl_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,
error);
if (bmp == NULL)
{
CFRelease (image);
return NULL;
}
rowstride = cogl_bitmap_get_rowstride (bmp);
out_data = _cogl_bitmap_map (bmp,
COGL_BUFFER_ACCESS_WRITE,
COGL_BUFFER_MAP_HINT_DISCARD,
error);
if (out_data == NULL)
{
cogl_object_unref (bmp);
CFRelease (image);
return NULL;
}
/* render to buffer */
color_space = CGColorSpaceCreateWithName (kCGColorSpaceGenericRGB);
bitmap_context = CGBitmapContextCreate (out_data,
width, height, 8,
rowstride, color_space,
kCGImageAlphaPremultipliedFirst);
CGColorSpaceRelease (color_space);
CGContextSetBlendMode (bitmap_context, kCGBlendModeCopy);
{
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 (CoglContext *ctx,
const char *filename,
CoglError **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;
GError *glib_error = NULL;
/* Load from file using GdkPixbuf */
pixbuf = gdk_pixbuf_new_from_file (filename, &glib_error);
if (pixbuf == NULL)
{
_cogl_propagate_gerror (error, glib_error);
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;
}
/* stb_image.c supports an STBI_grey_alpha format which we don't have
* a corresponding CoglPixelFormat for so as a special case we
* convert this to rgba8888.
*
* If we have a use case where this is an important format to consider
* then it could be worth adding a corresponding CoglPixelFormat
* instead.
*/
static uint8_t *
convert_ra_88_to_rgba_8888 (uint8_t *pixels,
int width,
int height)
{
int x, y;
uint8_t *buf;
size_t in_stride = width * 2;
size_t out_stride = width * 4;
buf = malloc (width * height * 4);
if (buf)
return NULL;
for (y = 0; y < height; y++)
for (x = 0; x < width; x++)
{
uint8_t *src = pixels + in_stride * y + 2 * x;
uint8_t *dst = buf + out_stride * y + 4 * x;
dst[0] = src[0];
dst[1] = src[0];
dst[2] = src[0];
dst[3] = src[1];
}
return buf;
}
static CoglBitmap *
_cogl_bitmap_new_from_stb_pixels (CoglContext *ctx,
uint8_t *pixels,
int stb_pixel_format,
int width,
int height,
CoglError **error)
{
static CoglUserDataKey bitmap_data_key;
CoglBitmap *bmp;
CoglPixelFormat cogl_format;
size_t stride;
if (pixels == NULL)
{
_cogl_set_error_literal (error,
COGL_BITMAP_ERROR,
COGL_BITMAP_ERROR_FAILED,
"Failed to load image with stb image library");
return NULL;
}
switch (stb_pixel_format)
{
case STBI_grey:
cogl_format = COGL_PIXEL_FORMAT_A_8;
break;
case STBI_grey_alpha:
{
uint8_t *tmp = pixels;
pixels = convert_ra_88_to_rgba_8888 (pixels, width, height);
free (tmp);
if (!pixels)
{
_cogl_set_error_literal (error,
COGL_BITMAP_ERROR,
COGL_BITMAP_ERROR_FAILED,
"Failed to alloc memory to convert "
"gray_alpha to rgba8888");
return NULL;
}
cogl_format = COGL_PIXEL_FORMAT_RGBA_8888;
break;
}
case STBI_rgb:
cogl_format = COGL_PIXEL_FORMAT_RGB_888;
break;
case STBI_rgb_alpha:
cogl_format = COGL_PIXEL_FORMAT_RGBA_8888;
break;
default:
g_warn_if_reached ();
return NULL;
}
stride = width * _cogl_pixel_format_get_bytes_per_pixel (cogl_format);
/* Store bitmap info */
bmp = cogl_bitmap_new_for_data (ctx,
width, height,
cogl_format,
stride,
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;
}
CoglBitmap *
_cogl_bitmap_from_file (CoglContext *ctx,
const char *filename,
CoglError **error)
{
int stb_pixel_format;
int width;
int height;
uint8_t *pixels;
pixels = stbi_load (filename,
&width, &height, &stb_pixel_format,
STBI_default);
return _cogl_bitmap_new_from_stb_pixels (ctx, pixels, stb_pixel_format,
width, height,
error);
}
#ifdef COGL_HAS_ANDROID_SUPPORT
CoglBitmap *
_cogl_android_bitmap_new_from_asset (CoglContext *ctx,
AAssetManager *manager,
const char *filename,
CoglError **error)
{
AAsset *asset;
const void *data;
off_t len;
int stb_pixel_format;
int width;
int height;
uint8_t *pixels;
CoglBitmap *bmp;
asset = AAssetManager_open (manager, filename, AASSET_MODE_BUFFER);
if (!asset)
{
_cogl_set_error_literal (error,
COGL_BITMAP_ERROR,
COGL_BITMAP_ERROR_FAILED,
"Failed to open asset");
return NULL;
}
data = AAsset_getBuffer (asset);
if (!data)
{
_cogl_set_error_literal (error,
COGL_BITMAP_ERROR,
COGL_BITMAP_ERROR_FAILED,
"Failed to ::getBuffer from asset");
return NULL;
}
len = AAsset_getLength (asset);
pixels = stbi_load_from_memory (data, len,
&width, &height,
&stb_pixel_format, STBI_default);
bmp = _cogl_bitmap_new_from_stb_pixels (ctx, pixels, stb_pixel_format,
width, height,
error);
AAsset_close (asset);
return bmp;
}
#endif
#endif