8ce5f5ade8
Previously the bitmap code was setup so that there could be an image library used to convert between formats and then some 'fallback' code when the image library can't handle the conversion. However there was never any implementation of the conversion in the image library so the fallback was always used. I don't think this split really makes sense so this patch renames cogl-bitmap-fallback to cogl-bitmap-conversion and removes the stub conversion functions in the image library. Reviewed-by: Robert Bragg <robert@linux.intel.com>
294 lines
8.2 KiB
C
294 lines
8.2 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-util.h"
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#include "cogl-internal.h"
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#include "cogl-bitmap-private.h"
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#include <string.h>
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#ifdef USE_QUARTZ
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#include <ApplicationServices/ApplicationServices.h>
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#elif defined(USE_GDKPIXBUF)
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#include <gdk-pixbuf/gdk-pixbuf.h>
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#endif
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#ifdef USE_QUARTZ
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gboolean
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_cogl_bitmap_get_size_from_file (const char *filename,
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int *width,
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int *height)
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{
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if (width)
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*width = 0;
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if (height)
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*height = 0;
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return TRUE;
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}
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/* the error does not contain the filename as the caller already has it */
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CoglBitmap *
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_cogl_bitmap_from_file (const char *filename,
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GError **error)
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{
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CFURLRef url;
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CGImageSourceRef image_source;
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CGImageRef image;
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int save_errno;
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CFStringRef type;
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gsize width, height, rowstride;
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guint8 *out_data;
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CGColorSpaceRef color_space;
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CGContextRef bitmap_context;
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g_assert (filename != NULL);
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g_assert (error == NULL || *error == NULL);
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url = CFURLCreateFromFileSystemRepresentation (NULL,
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(guchar *) filename,
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strlen (filename),
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false);
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image_source = CGImageSourceCreateWithURL (url, NULL);
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save_errno = errno;
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CFRelease (url);
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if (image_source == NULL)
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{
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/* doesn't exist, not readable, etc. */
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g_set_error_literal (error,
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COGL_BITMAP_ERROR,
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COGL_BITMAP_ERROR_FAILED,
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g_strerror (save_errno));
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return NULL;
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}
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/* Unknown images would be cleanly caught as zero width/height below, but try
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* to provide better error message
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*/
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type = CGImageSourceGetType (image_source);
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if (type == NULL)
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{
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CFRelease (image_source);
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g_set_error_literal (error,
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COGL_BITMAP_ERROR,
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COGL_BITMAP_ERROR_UNKNOWN_TYPE,
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"Unknown image type");
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return NULL;
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}
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CFRelease (type);
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image = CGImageSourceCreateImageAtIndex (image_source, 0, NULL);
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CFRelease (image_source);
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width = CGImageGetWidth (image);
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height = CGImageGetHeight (image);
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if (width == 0 || height == 0)
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{
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/* incomplete or corrupt */
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CFRelease (image);
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g_set_error_literal (error,
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COGL_BITMAP_ERROR,
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COGL_BITMAP_ERROR_CORRUPT_IMAGE,
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"Image has zero width or height");
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return NULL;
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}
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/* allocate buffer big enough to hold pixel data */
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rowstride = 4 * width;
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out_data = g_malloc0 (height * rowstride);
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/* render to buffer */
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color_space = CGColorSpaceCreateWithName (kCGColorSpaceGenericRGB);
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bitmap_context = CGBitmapContextCreate (out_data,
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width, height, 8,
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rowstride, color_space,
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kCGImageAlphaPremultipliedFirst);
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CGColorSpaceRelease (color_space);
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{
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const CGRect rect = {{0, 0}, {width, height}};
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CGContextDrawImage (bitmap_context, rect, image);
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}
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CGImageRelease (image);
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CGContextRelease (bitmap_context);
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/* store bitmap info */
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return _cogl_bitmap_new_from_data (out_data,
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COGL_PIXEL_FORMAT_ARGB_8888,
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width, height,
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rowstride,
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(CoglBitmapDestroyNotify) g_free,
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NULL);
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}
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#elif defined(USE_GDKPIXBUF)
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gboolean
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_cogl_bitmap_get_size_from_file (const char *filename,
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int *width,
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int *height)
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{
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_COGL_RETURN_VAL_IF_FAIL (filename != NULL, FALSE);
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if (gdk_pixbuf_get_file_info (filename, width, height) != NULL)
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return TRUE;
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return FALSE;
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}
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static void
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_cogl_bitmap_unref_pixbuf (guint8 *pixels,
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void *pixbuf)
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{
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g_object_unref (pixbuf);
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}
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CoglBitmap *
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_cogl_bitmap_from_file (const char *filename,
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GError **error)
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{
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GdkPixbuf *pixbuf;
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gboolean has_alpha;
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GdkColorspace color_space;
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CoglPixelFormat pixel_format;
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int width;
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int height;
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int rowstride;
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int bits_per_sample;
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int n_channels;
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_COGL_RETURN_VAL_IF_FAIL (error == NULL || *error == NULL, FALSE);
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/* Load from file using GdkPixbuf */
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pixbuf = gdk_pixbuf_new_from_file (filename, error);
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if (pixbuf == NULL)
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return FALSE;
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/* Get pixbuf properties */
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has_alpha = gdk_pixbuf_get_has_alpha (pixbuf);
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color_space = gdk_pixbuf_get_colorspace (pixbuf);
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width = gdk_pixbuf_get_width (pixbuf);
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height = gdk_pixbuf_get_height (pixbuf);
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rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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bits_per_sample = gdk_pixbuf_get_bits_per_sample (pixbuf);
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n_channels = gdk_pixbuf_get_n_channels (pixbuf);
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/* According to current docs this should be true and so
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* the translation to cogl pixel format below valid */
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g_assert (bits_per_sample == 8);
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if (has_alpha)
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g_assert (n_channels == 4);
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else
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g_assert (n_channels == 3);
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/* Translate to cogl pixel format */
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switch (color_space)
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{
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case GDK_COLORSPACE_RGB:
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/* The only format supported by GdkPixbuf so far */
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pixel_format = has_alpha ?
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COGL_PIXEL_FORMAT_RGBA_8888 :
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COGL_PIXEL_FORMAT_RGB_888;
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break;
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default:
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/* Ouch, spec changed! */
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g_object_unref (pixbuf);
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return FALSE;
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}
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/* We just use the data directly from the pixbuf so that we don't
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have to copy to a seperate buffer. Note that Cogl is expected not
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to read past the end of bpp*width on the last row even if the
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rowstride is much larger so we don't need to worry about
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GdkPixbuf's semantics that it may under-allocate the buffer. */
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return _cogl_bitmap_new_from_data (gdk_pixbuf_get_pixels (pixbuf),
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pixel_format,
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width,
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height,
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rowstride,
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_cogl_bitmap_unref_pixbuf,
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pixbuf);
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}
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#else
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#include "stb_image.c"
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gboolean
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_cogl_bitmap_get_size_from_file (const char *filename,
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int *width,
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int *height)
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{
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if (width)
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*width = 0;
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if (height)
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*height = 0;
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return TRUE;
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}
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CoglBitmap *
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_cogl_bitmap_from_file (const char *filename,
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GError **error)
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{
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CoglBitmap *bmp;
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int stb_pixel_format;
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int width;
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int height;
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guint8 *pixels;
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_COGL_RETURN_VAL_IF_FAIL (error == NULL || *error == NULL, FALSE);
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/* Load from file using stb */
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pixels = stbi_load (filename,
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&width, &height, &stb_pixel_format,
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STBI_rgb_alpha);
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if (pixels == NULL)
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return FALSE;
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/* Store bitmap info */
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bmp = _cogl_bitmap_new_from_data (g_memdup (pixels, height * width * 4),
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COGL_PIXEL_FORMAT_RGBA_8888,
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width, height,
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width * 4,
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(CoglBitmapDestroyNotify) g_free,
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NULL);
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free (pixels);
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return bmp;
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}
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#endif
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