Simplify code (python-pillow#8863)

Author: hugovk

src/PIL/ImageGrab.py

@@ -134,10 +134,10 @@ def grabclipboard() -> Image.Image | list[str] | None:
             import struct
 
             o = struct.unpack_from("I", data)[0]
-            if data[16] != 0:
-                files = data[o:].decode("utf-16le").split("\0")
-            else:
+            if data[16] == 0:
                 files = data[o:].decode("mbcs").split("\0")
+            else:
+                files = data[o:].decode("utf-16le").split("\0")
             return files[: files.index("")]
         if isinstance(data, bytes):
             data = io.BytesIO(data)

src/PIL/JpegImagePlugin.py

@@ -762,8 +762,7 @@ def validate_qtables(
     extra = info.get("extra", b"")
 
     MAX_BYTES_IN_MARKER = 65533
-    xmp = info.get("xmp")
-    if xmp:
+    if xmp := info.get("xmp"):
         overhead_len = 29  # b"http://ns.adobe.com/xap/1.0/\x00"
         max_data_bytes_in_marker = MAX_BYTES_IN_MARKER - overhead_len
         if len(xmp) > max_data_bytes_in_marker:
@@ -772,8 +771,7 @@ def validate_qtables(
         size = o16(2 + overhead_len + len(xmp))
         extra += b"\xff\xe1" + size + b"http://ns.adobe.com/xap/1.0/\x00" + xmp
 
-    icc_profile = info.get("icc_profile")
-    if icc_profile:
+    if icc_profile := info.get("icc_profile"):
         overhead_len = 14  # b"ICC_PROFILE\0" + o8(i) + o8(len(markers))
         max_data_bytes_in_marker = MAX_BYTES_IN_MARKER - overhead_len
         markers = []
@@ -831,7 +829,6 @@ def validate_qtables(
     # in a shot. Guessing on the size, at im.size bytes. (raw pixel size is
     # channels*size, this is a value that's been used in a django patch.
     # https://github.com/matthewwithanm/django-imagekit/issues/50
-    bufsize = 0
     if optimize or progressive:
         # CMYK can be bigger
         if im.mode == "CMYK":
@@ -848,7 +845,7 @@ def validate_qtables(
     else:
         # The EXIF info needs to be written as one block, + APP1, + one spare byte.
         # Ensure that our buffer is big enough. Same with the icc_profile block.
-        bufsize = max(bufsize, len(exif) + 5, len(extra) + 1)
+        bufsize = max(len(exif) + 5, len(extra) + 1)
 
     ImageFile._save(
         im, fp, [ImageFile._Tile("jpeg", (0, 0) + im.size, 0, rawmode)], bufsize

src/libImaging/Arrow.c

@@ -101,7 +101,7 @@ export_imaging_schema(Imaging im, struct ArrowSchema *schema) {
     }
 
     /* for now, single block images */
-    if (!(im->blocks_count == 0 || im->blocks_count == 1)) {
+    if (im->blocks_count > 1) {
         return IMAGING_ARROW_MEMORY_LAYOUT;
     }
 
@@ -159,7 +159,7 @@ export_single_channel_array(Imaging im, struct ArrowArray *array) {
     int length = im->xsize * im->ysize;
 
     /* for now, single block images */
-    if (!(im->blocks_count == 0 || im->blocks_count == 1)) {
+    if (im->blocks_count > 1) {
         return IMAGING_ARROW_MEMORY_LAYOUT;
     }
 
@@ -202,7 +202,7 @@ export_fixed_pixel_array(Imaging im, struct ArrowArray *array) {
     int length = im->xsize * im->ysize;
 
     /* for now, single block images */
-    if (!(im->blocks_count == 0 || im->blocks_count == 1)) {
+    if (im->blocks_count > 1) {
         return IMAGING_ARROW_MEMORY_LAYOUT;
     }
 

src/libImaging/Draw.c

@@ -439,9 +439,7 @@ draw_horizontal_lines(
  * Filled polygon draw function using scan line algorithm.
  */
 static inline int
-polygon_generic(
-    Imaging im, int n, Edge *e, int ink, int eofill, hline_handler hline, int hasAlpha
-) {
+polygon_generic(Imaging im, int n, Edge *e, int ink, int eofill, hline_handler hline) {
     Edge **edge_table;
     float *xx;
     int edge_count = 0;
@@ -461,6 +459,7 @@ polygon_generic(
         return -1;
     }
 
+    int hasAlpha = hline == hline32rgba;
     for (i = 0; i < n; i++) {
         if (ymin > e[i].ymin) {
             ymin = e[i].ymin;
@@ -590,21 +589,6 @@ polygon_generic(
     return 0;
 }
 
-static inline int
-polygon8(Imaging im, int n, Edge *e, int ink, int eofill) {
-    return polygon_generic(im, n, e, ink, eofill, hline8, 0);
-}
-
-static inline int
-polygon32(Imaging im, int n, Edge *e, int ink, int eofill) {
-    return polygon_generic(im, n, e, ink, eofill, hline32, 0);
-}
-
-static inline int
-polygon32rgba(Imaging im, int n, Edge *e, int ink, int eofill) {
-    return polygon_generic(im, n, e, ink, eofill, hline32rgba, 1);
-}
-
 static inline void
 add_edge(Edge *e, int x0, int y0, int x1, int y1) {
     /* printf("edge %d %d %d %d\n", x0, y0, x1, y1); */
@@ -641,12 +625,11 @@ typedef struct {
     void (*point)(Imaging im, int x, int y, int ink);
     void (*hline)(Imaging im, int x0, int y0, int x1, int ink);
     void (*line)(Imaging im, int x0, int y0, int x1, int y1, int ink);
-    int (*polygon)(Imaging im, int n, Edge *e, int ink, int eofill);
 } DRAW;
 
-DRAW draw8 = {point8, hline8, line8, polygon8};
-DRAW draw32 = {point32, hline32, line32, polygon32};
-DRAW draw32rgba = {point32rgba, hline32rgba, line32rgba, polygon32rgba};
+DRAW draw8 = {point8, hline8, line8};
+DRAW draw32 = {point32, hline32, line32};
+DRAW draw32rgba = {point32rgba, hline32rgba, line32rgba};
 
 /* -------------------------------------------------------------------- */
 /* Interface                                                            */
@@ -731,7 +714,7 @@ ImagingDrawWideLine(
         add_edge(e + 2, vertices[2][0], vertices[2][1], vertices[3][0], vertices[3][1]);
         add_edge(e + 3, vertices[3][0], vertices[3][1], vertices[0][0], vertices[0][1]);
 
-        draw->polygon(im, 4, e, ink, 0);
+        polygon_generic(im, 4, e, ink, 0, draw->hline);
     }
     return 0;
 }
@@ -839,7 +822,7 @@ ImagingDrawPolygon(
         if (xy[i * 2] != xy[0] || xy[i * 2 + 1] != xy[1]) {
             add_edge(&e[n++], xy[i * 2], xy[i * 2 + 1], xy[0], xy[1]);
         }
-        draw->polygon(im, n, e, ink, 0);
+        polygon_generic(im, n, e, ink, 0, draw->hline);
         free(e);
 
     } else {
@@ -1989,7 +1972,7 @@ ImagingDrawOutline(
 
     DRAWINIT();
 
-    draw->polygon(im, outline->count, outline->edges, ink, 0);
+    polygon_generic(im, outline->count, outline->edges, ink, 0, draw->hline);
 
     return 0;
 }