fate/webp : add test for webp lossless decoding (rgb and rgba)

output have been compared with official decoding tool output (dwebp)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

tests/fate/image.mak

@@ -355,6 +355,16 @@ FATE_TIFF-$(call DEMDEC, IMAGE2, TIFF) += $(FATE_TIFF)
 FATE_IMAGE += $(FATE_TIFF-yes)
 fate-tiff: $(FATE_TIFF-yes)
 
+FATE_WEBP += fate-webp-rgb-lossless
+fate-webp-rgb-lossless: CMD = framecrc -i $(TARGET_SAMPLES)/webp/rgb_lossless.webp
+
+FATE_WEBP += fate-webp-rgba-lossless
+fate-webp-rgba-lossless: CMD = framecrc -i $(TARGET_SAMPLES)/webp/rgba_lossless.webp
+
+FATE_WEBP-$(call DEMDEC, IMAGE2, WEBP) += $(FATE_WEBP)
+FATE_IMAGE += $(FATE_WEBP-yes)
+fate-webp: $(FATE_WEBP-yes)
+
 FATE_IMAGE-$(call DEMDEC, IMAGE2, XFACE) += fate-xface
 fate-xface: CMD = framecrc -i $(TARGET_SAMPLES)/xface/lena.xface
 

tests/ref/fate/webp-rgb-lossless

+#tb 0: 1/25
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 12x8
+#sar 0: 0/1
+0,          0,          0,        1,      384, 0xe30d1b01

tests/ref/fate/webp-rgba-lossless

+#tb 0: 1/25
+#media_type 0: video
+#codec_id 0: rawvideo
+#dimensions 0: 12x8
+#sar 0: 0/1
+0,          0,          0,        1,      384, 0xbd35e0e6