shithub: jbig2

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Some code cleanup. Remember the external combination op for region
segments and use it. Also add the missing REPLACE operator to the
enum (but not yet implemented in the compositor). Only some routines
can use this one. Also add some missing prototypes.


git-svn-id: http://svn.ghostscript.com/jbig2dec/trunk@420 ded80894-8fb9-0310-811b-c03f3676ab4d

--- a/jbig2_priv.h

+++ b/jbig2_priv.h

@@ -121,6 +121,7 @@

 };

 int jbig2_parse_page_info (Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data);

+int jbig2_parse_end_of_stripe(Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data);

 int jbig2_parse_end_of_page(Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data);

 int jbig2_parse_extension_segment(Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data);

@@ -128,7 +129,8 @@

     JBIG2_COMPOSE_OR = 0,

     JBIG2_COMPOSE_AND = 1,

     JBIG2_COMPOSE_XOR = 2,

-    JBIG2_COMPOSE_XNOR = 3

+    JBIG2_COMPOSE_XNOR = 3,

+    JBIG2_COMPOSE_REPLACE = 4

 } Jbig2ComposeOp;

 int jbig2_image_compose(Jbig2Ctx *ctx, Jbig2Image *dst, Jbig2Image *src, int x, int y, Jbig2ComposeOp op);

@@ -141,6 +143,7 @@

   int32_t height;

   int32_t x;

   int32_t y;

+  Jbig2ComposeOp op;

   uint8_t flags;

 } Jbig2RegionSegmentInfo;

@@ -150,7 +153,9 @@

 /* 7.4 */

 int jbig2_immediate_generic_region(Jbig2Ctx *ctx, Jbig2Segment *segment,

 			       const uint8_t *segment_data);

-                               

+int jbig2_refinement_region(Jbig2Ctx *ctx, Jbig2Segment *segment,

+                               const byte *segment_data);

+          

 /* The word stream design is a compromise between simplicity and

    trying to amortize the number of method calls. Each ::get_next_word

    invocation pulls 4 bytes from the stream, packed big-endian into a

--- a/jbig2_refinement.c

+++ b/jbig2_refinement.c

@@ -436,7 +436,7 @@

             "composing %dx%d decoded refinement region onto page at (%d, %d)",

             rsi.width, rsi.height, rsi.x, rsi.y);

 	jbig2_page_add_result(ctx, &ctx->pages[ctx->current_page],

-          image, rsi.x, rsi.y, JBIG2_COMPOSE_OR);

+          image, rsi.x, rsi.y, rsi.op);

         jbig2_image_release(ctx, image);

     }

   }

--- a/jbig2_segment.c

+++ b/jbig2_segment.c

@@ -186,6 +186,7 @@

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

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

   info->flags = segment_data[16];

+  info->op = info->flags & 0x7;

 }

 /* dispatch code for extension segment parsing */

--- a/jbig2_text.c

+++ b/jbig2_text.c

@@ -376,7 +376,7 @@

     params.SBDEFPIXEL = flags & 0x0200;

     params.SBDSOFFSET = (flags & 0x7C00) >> 10;

     params.SBRTEMPLATE = flags & 0x8000;

-    

+

     if (params.SBHUFF)	/* Huffman coding */

       {

         /* 7.4.3.1.2 */

@@ -626,12 +626,11 @@

         segment->result = image;

     } else {

         /* otherwise composite onto the page */

-	Jbig2Image *page_image = ctx->pages[ctx->current_page].image;

         jbig2_error(ctx, JBIG2_SEVERITY_DEBUG, segment->number, 

             "composing %dx%d decoded text region onto page at (%d, %d)",

             region_info.width, region_info.height, region_info.x, region_info.y);

 	jbig2_page_add_result(ctx, &ctx->pages[ctx->current_page], image,

-			      region_info.x, region_info.y, JBIG2_COMPOSE_OR);

+			      region_info.x, region_info.y, region_info.op);

         jbig2_image_release(ctx, image);

     }