core: new tex image loader, abstract format generated from texturecompress.py

kivy/__init__.py

@@ -190,7 +190,7 @@ kivy_options = {
     'text': ('pil', 'pygame', 'sdlttf'),
     'video': ('ffmpeg', 'gstreamer', 'pyglet'),
     'audio': ('pygame', 'gstreamer', 'sdl'),
-    'image': ('imageio', 'dds', 'gif', 'pil', 'pygame'),
+    'image': ('tex', 'imageio', 'dds', 'gif', 'pil', 'pygame'),
     'camera': ('opencv', 'gstreamer', 'videocapture'),
     'spelling': ('enchant', 'osxappkit', ),
     'clipboard': ('pygame', 'dummy'), }

kivy/core/image/__init__.py

@@ -44,7 +44,8 @@ class ImageData(object):
 
     __slots__ = ('fmt', 'mipmaps', 'source', 'flip_vertical')
     _supported_fmts = ('rgb', 'rgba', 'bgr', 'bgra',
-            's3tc_dxt1', 's3tc_dxt3', 's3tc_dxt5')
+            's3tc_dxt1', 's3tc_dxt3', 's3tc_dxt5',
+            'pvrtc_rgb2', 'pvrtc_rgb4', 'pvrtc_rgba2', 'pvrtc_rgba4')
 
     def __init__(self, width, height, fmt, data, source=None, flip_vertical=True):
         assert fmt in ImageData._supported_fmts
@@ -709,6 +710,7 @@ image_libs = []
 if platform() in ('macosx', 'ios'):
     image_libs += [('imageio', 'img_imageio')]
 image_libs += [
+    ('tex', 'img_tex'),
     ('dds', 'img_dds'),
     ('pygame', 'img_pygame'),
     ('pil', 'img_pil'),

kivy/core/image/img_tex.py

@@ -0,0 +1,57 @@
+'''
+Tex: Compressed texture
+'''
+
+__all__ = ('ImageLoaderTex', )
+
+import json
+from struct import unpack
+from kivy.logger import Logger
+from kivy.core.image import ImageLoaderBase, ImageData, ImageLoader
+
+
+class ImageLoaderTex(ImageLoaderBase):
+
+    @staticmethod
+    def extensions():
+        return ('tex', )
+
+    def load(self, filename):
+        try:
+            fd = open(filename, 'rb')
+            if fd.read(4) != 'KTEX':
+                raise Exception('Invalid tex identifier')
+
+            headersize = unpack('I', fd.read(4))[0]
+            header = fd.read(headersize)
+            if len(header) != headersize:
+                raise Exception('Truncated tex header')
+
+            info = json.loads(header)
+            data = fd.read()
+            if len(data) != info['datalen']:
+                raise Exception('Truncated tex data')
+
+        except:
+            Logger.warning('Image: Image <%s> is corrupted' % filename)
+            raise
+
+        width, height = info['image_size']
+        tw, th = info['texture_size']
+
+        images = [data]
+        im = ImageData(width, height, str(info['format']), images[0],
+                source=filename)
+        '''
+        if len(dds.images) > 1:
+            images = dds.images
+            images_size = dds.images_size
+            for index in xrange(1, len(dds.images)):
+                w, h = images_size[index]
+                data = images[index]
+                im.add_mipmap(index, w, h, data)
+        '''
+        return [im]
+
+# register
+ImageLoader.register(ImageLoaderTex)