45 static void SnapTopLeftPosition(const WebPPicture* const pic,  in SnapTopLeftPosition()  argument
47   if (!pic->use_argb) {  in SnapTopLeftPosition()
54 static int AdjustAndCheckRectangle(const WebPPicture* const pic,  in AdjustAndCheckRectangle()  argument
57   SnapTopLeftPosition(pic, left, top);  in AdjustAndCheckRectangle()
60   if ((*left) + width > pic->width) return 0;  in AdjustAndCheckRectangle()
61   if ((*top) + height > pic->height) return 0;  in AdjustAndCheckRectangle()
132 int WebPPictureCrop(WebPPicture* pic,  in WebPPictureCrop()  argument
136   if (pic == NULL) return 0;  in WebPPictureCrop()
137   if (!AdjustAndCheckRectangle(pic, &left, &top, width, height)) return 0;  in WebPPictureCrop()
139   PictureGrabSpecs(pic, &tmp);  in WebPPictureCrop()
144   if (!pic->use_argb) {  in WebPPictureCrop()
145     const int y_offset = top * pic->y_stride + left;  in WebPPictureCrop()
146     const int uv_offset = (top / 2) * pic->uv_stride + left / 2;  in WebPPictureCrop()
147     CopyPlane(pic->y + y_offset, pic->y_stride,  in WebPPictureCrop()
149     CopyPlane(pic->u + uv_offset, pic->uv_stride,  in WebPPictureCrop()
151     CopyPlane(pic->v + uv_offset, pic->uv_stride,  in WebPPictureCrop()
155       const int a_offset = top * pic->a_stride + left;  in WebPPictureCrop()
156       CopyPlane(pic->a + a_offset, pic->a_stride,  in WebPPictureCrop()
161         (const uint8_t*)(pic->argb + top * pic->argb_stride + left);  in WebPPictureCrop()
162     CopyPlane(src, pic->argb_stride * 4,  in WebPPictureCrop()
166   WebPPictureFree(pic);  in WebPPictureCrop()
167   *pic = tmp;  in WebPPictureCrop()
196 static void AlphaMultiplyARGB(WebPPicture* const pic, int inverse) {  in AlphaMultiplyARGB()  argument
197   assert(pic->argb != NULL);  in AlphaMultiplyARGB()
198   WebPMultARGBRows((uint8_t*)pic->argb, pic->argb_stride * sizeof(*pic->argb),  in AlphaMultiplyARGB()
199                    pic->width, pic->height, inverse);  in AlphaMultiplyARGB()
202 static void AlphaMultiplyY(WebPPicture* const pic, int inverse) {  in AlphaMultiplyY()  argument
203   if (pic->a != NULL) {  in AlphaMultiplyY()
204     WebPMultRows(pic->y, pic->y_stride, pic->a, pic->a_stride,  in AlphaMultiplyY()
205                  pic->width, pic->height, inverse);  in AlphaMultiplyY()
209 int WebPPictureRescale(WebPPicture* pic, int width, int height) {  in WebPPictureRescale()  argument
214   if (pic == NULL) return 0;  in WebPPictureRescale()
215   prev_width = pic->width;  in WebPPictureRescale()
216   prev_height = pic->height;  in WebPPictureRescale()
228   PictureGrabSpecs(pic, &tmp);  in WebPPictureRescale()
233   if (!pic->use_argb) {  in WebPPictureRescale()
240     if (pic->a != NULL) {  in WebPPictureRescale()
242       RescalePlane(pic->a, prev_width, prev_height, pic->a_stride,  in WebPPictureRescale()
248     AlphaMultiplyY(pic, 0);  in WebPPictureRescale()
249     RescalePlane(pic->y, prev_width, prev_height, pic->y_stride,  in WebPPictureRescale()
253     RescalePlane(pic->u,  in WebPPictureRescale()
254                  HALVE(prev_width), HALVE(prev_height), pic->uv_stride,  in WebPPictureRescale()
257     RescalePlane(pic->v,  in WebPPictureRescale()
258                  HALVE(prev_width), HALVE(prev_height), pic->uv_stride,  in WebPPictureRescale()
271     AlphaMultiplyARGB(pic, 0);  in WebPPictureRescale()
272     RescalePlane((const uint8_t*)pic->argb, prev_width, prev_height,  in WebPPictureRescale()
273                  pic->argb_stride * 4,  in WebPPictureRescale()
279   WebPPictureFree(pic);  in WebPPictureRescale()
281   *pic = tmp;  in WebPPictureRescale()