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jbig2dec: Read region segment height/width/x/y as unsigned.

The specification in 5.4.4 states that numbers are unsigned unless
otherwise stated. 7.4.1.1 through 7.4.1.4 specifying the region segment
height, width, x and y do not mention that these fields are signed,
hence they ought to read and handled as unsigned.

--- a/jbig2_generic.c

+++ b/jbig2_generic.c

@@ -839,7 +839,7 @@

         return jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number, "segment too short");

     jbig2_get_region_segment_info(&rsi, segment_data);

-    jbig2_error(ctx, JBIG2_SEVERITY_INFO, segment->number, "generic region: %d x %d @ (%d, %d), flags = %02x", rsi.width, rsi.height, rsi.x, rsi.y, rsi.flags);

+    jbig2_error(ctx, JBIG2_SEVERITY_INFO, segment->number, "generic region: %u x %u @ (%u, %u), flags = %02x", rsi.width, rsi.height, rsi.x, rsi.y, rsi.flags);

     /* 7.4.6.4 */

     height = rsi.height;

--- a/jbig2_halftone.c

+++ b/jbig2_halftone.c

@@ -575,7 +575,7 @@

     offset += 1;

     jbig2_error(ctx, JBIG2_SEVERITY_INFO, segment->number,

-                "halftone region: %d x %d @ (%x,%d) flags=%02x", region_info.width, region_info.height, region_info.x, region_info.y, params.flags);

+                "halftone region: %u x %u @ (%u, %u), flags = %02x", region_info.width, region_info.height, region_info.x, region_info.y, params.flags);

     if (params.HMMR && params.HTEMPLATE) {

         jbig2_error(ctx, JBIG2_SEVERITY_WARNING, segment->number, "HTEMPLATE is %d when HMMR is %d, contrary to spec", params.HTEMPLATE, params.HMMR);

--- a/jbig2_page.c

+++ b/jbig2_page.c

@@ -258,7 +258,7 @@

  * is an image) to a page image buffer

  **/

 int

-jbig2_page_add_result(Jbig2Ctx *ctx, Jbig2Page *page, Jbig2Image *image, int x, int y, Jbig2ComposeOp op)

+jbig2_page_add_result(Jbig2Ctx *ctx, Jbig2Page *page, Jbig2Image *image, uint32_t x, uint32_t y, Jbig2ComposeOp op)

 {

     int code;

--- a/jbig2_page.h

+++ b/jbig2_page.h

@@ -48,6 +48,6 @@

 int jbig2_page_info(Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data);

 int jbig2_end_of_stripe(Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data);

 int jbig2_end_of_page(Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data);

-int jbig2_page_add_result(Jbig2Ctx *ctx, Jbig2Page *page, Jbig2Image *src, int x, int y, Jbig2ComposeOp op);

+int jbig2_page_add_result(Jbig2Ctx *ctx, Jbig2Page *page, Jbig2Image *src, uint32_t x, uint32_t y, Jbig2ComposeOp op);

 #endif /* _JBIG2_PAGE_H */

--- a/jbig2_refinement.c

+++ b/jbig2_refinement.c

@@ -432,7 +432,7 @@

         return jbig2_error(ctx, JBIG2_SEVERITY_FATAL, segment->number, "segment too short");

     jbig2_get_region_segment_info(&rsi, segment_data);

-    jbig2_error(ctx, JBIG2_SEVERITY_INFO, segment->number, "generic region: %d x %d @ (%d, %d), flags = %02x", rsi.width, rsi.height, rsi.x, rsi.y, rsi.flags);

+    jbig2_error(ctx, JBIG2_SEVERITY_INFO, segment->number, "generic region: %u x %u @ (%u, %u), flags = %02x", rsi.width, rsi.height, rsi.x, rsi.y, rsi.flags);

     /* 7.4.7.2 */

     seg_flags = segment_data[17];

--- a/jbig2_segment.c

+++ b/jbig2_segment.c

@@ -196,10 +196,10 @@

 jbig2_get_region_segment_info(Jbig2RegionSegmentInfo *info, const uint8_t *segment_data)

 {

     /* 7.4.1 */

-    info->width = jbig2_get_int32(segment_data);

-    info->height = jbig2_get_int32(segment_data + 4);

-    info->x = jbig2_get_int32(segment_data + 8);

-    info->y = jbig2_get_int32(segment_data + 12);

+    info->width = jbig2_get_uint32(segment_data);

+    info->height = jbig2_get_uint32(segment_data + 4);

+    info->x = jbig2_get_uint32(segment_data + 8);

+    info->y = jbig2_get_uint32(segment_data + 12);

     info->flags = segment_data[16];

     info->op = (Jbig2ComposeOp)(info->flags & 0x7);

 }

--- a/jbig2_segment.h

+++ b/jbig2_segment.h

@@ -41,10 +41,10 @@

 /* region segment info */

 typedef struct {

-    int32_t width;

-    int32_t height;

-    int32_t x;

-    int32_t y;

+    uint32_t width;

+    uint32_t height;

+    uint32_t x;

+    uint32_t y;

     Jbig2ComposeOp op;

     uint8_t flags;

 } Jbig2RegionSegmentInfo;