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Add API for extracting image size from a file
For the asynchronous loading we need a function call that parses a file, given its path, and retrieves the image width and height. This commit adds cogl_bitmap_get_size_from_file() to the CoglBitmap API.
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@ -415,10 +415,27 @@ void cogl_texture_polygon (CoglHandle handle,
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*
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* Returns: A #CoglBitmap to the new loaded image data, or %NULL if loading
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* the image failed.
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*
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* Since: 1.0
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*/
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CoglBitmap * cogl_bitmap_new_from_file (const gchar *filename,
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GError **error);
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/**
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* cogl_bitmap_get_size_from_file:
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* @filename: the file to check
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* @width: return location for the bitmap width
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* @height: return location for the bitmap height
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*
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* Parses an image file enough to extract the width and height
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* of the bitmap.
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*
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* Since: 1.0
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*/
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gboolean cogl_bitmap_get_size_from_file (const gchar *filename,
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gint *width,
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gint *height);
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/**
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* cogl_bitmap_free:
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* @bmp: a #CoglBitmap.
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@ -84,6 +84,20 @@ cogl_bitmap_error_quark (void)
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return g_quark_from_static_string ("cogl-bitmap-error-quark");
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}
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gboolean
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_cogl_bitmap_get_size_from_file (const gchar *filename,
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gint *width,
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gint *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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gboolean
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_cogl_bitmap_from_file (CoglBitmap *bmp,
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@ -177,9 +191,22 @@ _cogl_bitmap_from_file (CoglBitmap *bmp,
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#elif defined(USE_GDKPIXBUF)
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gboolean
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_cogl_bitmap_from_file (CoglBitmap *bmp,
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const gchar *filename,
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GError **error)
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_cogl_bitmap_get_size_from_file (const gchar *filename,
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gint *width,
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gint *height)
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{
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g_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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gboolean
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_cogl_bitmap_from_file (CoglBitmap *bmp,
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const gchar *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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@ -198,11 +225,13 @@ _cogl_bitmap_from_file (CoglBitmap *bmp,
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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if (bmp == NULL) return FALSE;
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if (bmp == NULL)
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return 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) return FALSE;
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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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@ -278,6 +307,20 @@ _cogl_bitmap_from_file (CoglBitmap *bmp,
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#include "stb_image.c"
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gboolean
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_cogl_bitmap_get_size_from_file (const gchar *filename,
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gint *width,
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gint *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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gboolean
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_cogl_bitmap_from_file (CoglBitmap *bmp,
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const gchar *filename,
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@ -290,11 +333,15 @@ _cogl_bitmap_from_file (CoglBitmap *bmp,
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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if (bmp == NULL) return FALSE;
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if (bmp == NULL)
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return FALSE;
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/* Load from file using stb */
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pixels = stbi_load (filename, &width, &height, &stb_pixel_format, STBI_rgb_alpha);
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if (pixels == NULL) return FALSE;
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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->data = g_memdup (pixels, height * width * 4);
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@ -149,6 +149,14 @@ _cogl_bitmap_copy_subregion (CoglBitmap *src,
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}
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}
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gboolean
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cogl_bitmap_get_size_from_file (const gchar *filename,
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gint *width,
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gint *height)
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{
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return _cogl_bitmap_get_size_from_file (filename, width, height);
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}
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CoglBitmap *
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cogl_bitmap_new_from_file (const gchar *filename,
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GError **error)
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@ -90,4 +90,9 @@ _cogl_bitmap_copy_subregion (CoglBitmap *src,
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gint width,
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gint height);
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gboolean
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_cogl_bitmap_get_size_from_file (const gchar *filename,
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gint *width,
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gint *height);
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#endif /* __COGL_BITMAP_H */
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