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Unified Diff: core/src/fxcodec/codec/fx_codec_fax.cpp

Issue 1419473006: XFA: bring fx_codec_fax in-line with master (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@xfa
Patch Set: Created 5 years, 2 months ago
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Index: core/src/fxcodec/codec/fx_codec_fax.cpp
diff --git a/core/src/fxcodec/codec/fx_codec_fax.cpp b/core/src/fxcodec/codec/fx_codec_fax.cpp
index ff9d45d256a671a67d27ff18cfef4505b46ab107..5af1d9e7ceab99459678d6314b84426fc9518a98 100644
--- a/core/src/fxcodec/codec/fx_codec_fax.cpp
+++ b/core/src/fxcodec/codec/fx_codec_fax.cpp
@@ -281,6 +281,191 @@ int FaxGetRun(const uint8_t* ins_array,
}
}
+FX_BOOL FaxG4GetRow(const uint8_t* src_buf,
+ int bitsize,
+ int& bitpos,
+ uint8_t* dest_buf,
+ const uint8_t* ref_buf,
+ int columns) {
+ int a0 = -1;
+ bool a0color = true;
+ while (1) {
+ if (bitpos >= bitsize) {
+ return FALSE;
+ }
+ int a1, a2, b1, b2;
+ FaxG4FindB1B2(ref_buf, columns, a0, a0color, b1, b2);
+ FX_BOOL bit = NEXTBIT;
+ int v_delta = 0;
+ if (bit) {
+ } else {
+ if (bitpos >= bitsize) {
+ return FALSE;
+ }
+ FX_BOOL bit1 = NEXTBIT;
+ if (bitpos >= bitsize) {
+ return FALSE;
+ }
+ FX_BOOL bit2 = NEXTBIT;
+ if (bit1 && bit2) {
+ v_delta = 1;
+ } else if (bit1) {
+ v_delta = -1;
+ } else if (bit2) {
+ int run_len1 = 0;
+ while (1) {
+ int run = FaxGetRun(a0color ? FaxWhiteRunIns : FaxBlackRunIns,
+ src_buf, bitpos, bitsize);
+ run_len1 += run;
+ if (run < 64) {
+ break;
+ }
+ }
+ if (a0 < 0) {
+ run_len1++;
+ }
+ a1 = a0 + run_len1;
+ if (!a0color) {
+ FaxFillBits(dest_buf, columns, a0, a1);
+ }
+ int run_len2 = 0;
+ while (1) {
+ int run = FaxGetRun(a0color ? FaxBlackRunIns : FaxWhiteRunIns,
+ src_buf, bitpos, bitsize);
+ run_len2 += run;
+ if (run < 64) {
+ break;
+ }
+ }
+ a2 = a1 + run_len2;
+ if (a0color) {
+ FaxFillBits(dest_buf, columns, a1, a2);
+ }
+ a0 = a2;
+ if (a0 < columns) {
+ continue;
+ }
+ return TRUE;
+ } else {
+ if (bitpos >= bitsize) {
+ return FALSE;
+ }
+ bit = NEXTBIT;
+ if (bit) {
+ if (!a0color) {
+ FaxFillBits(dest_buf, columns, a0, b2);
+ }
+ if (b2 >= columns) {
+ return TRUE;
+ }
+ a0 = b2;
+ continue;
+ } else {
+ if (bitpos >= bitsize) {
+ return FALSE;
+ }
+ FX_BOOL bit1 = NEXTBIT;
+ if (bitpos >= bitsize) {
+ return FALSE;
+ }
+ FX_BOOL bit2 = NEXTBIT;
+ if (bit1 && bit2) {
+ v_delta = 2;
+ } else if (bit1) {
+ v_delta = -2;
+ } else if (bit2) {
+ if (bitpos >= bitsize) {
+ return FALSE;
+ }
+ bit = NEXTBIT;
+ if (bit) {
+ v_delta = 3;
+ } else {
+ v_delta = -3;
+ }
+ } else {
+ if (bitpos >= bitsize) {
+ return FALSE;
+ }
+ bit = NEXTBIT;
+ if (bit) {
+ bitpos += 3;
+ continue;
+ } else {
+ bitpos += 5;
+ return TRUE;
+ }
+ }
+ }
+ }
+ }
+ a1 = b1 + v_delta;
+ if (!a0color) {
+ FaxFillBits(dest_buf, columns, a0, a1);
+ }
+ if (a1 >= columns) {
+ return TRUE;
+ }
+ a0 = a1;
+ a0color = !a0color;
+ }
+}
+
+FX_BOOL FaxSkipEOL(const uint8_t* src_buf, int bitsize, int& bitpos) {
+ int startbit = bitpos;
+ while (bitpos < bitsize) {
+ int bit = NEXTBIT;
+ if (bit) {
+ if (bitpos - startbit <= 11) {
+ bitpos = startbit;
+ }
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+FX_BOOL FaxGet1DLine(const uint8_t* src_buf,
+ int bitsize,
+ int& bitpos,
+ uint8_t* dest_buf,
+ int columns) {
+ bool color = true;
+ int startpos = 0;
+ while (1) {
+ if (bitpos >= bitsize) {
+ return FALSE;
+ }
+ int run_len = 0;
+ while (1) {
+ int run = FaxGetRun(color ? FaxWhiteRunIns : FaxBlackRunIns, src_buf,
+ bitpos, bitsize);
+ if (run < 0) {
+ while (bitpos < bitsize) {
+ int bit = NEXTBIT;
+ if (bit) {
+ return TRUE;
+ }
+ }
+ return FALSE;
+ }
+ run_len += run;
+ if (run < 64) {
+ break;
+ }
+ }
+ if (!color) {
+ FaxFillBits(dest_buf, columns, startpos, startpos + run_len);
+ }
+ startpos += run_len;
+ if (startpos >= columns) {
+ break;
+ }
+ color = !color;
+ }
+ return TRUE;
+}
+
const uint8_t BlackRunTerminator[128] = {
0x37, 10, 0x02, 3, 0x03, 2, 0x02, 2, 0x03, 3, 0x03, 4, 0x02, 4,
0x03, 5, 0x05, 6, 0x04, 6, 0x04, 7, 0x05, 7, 0x07, 7, 0x04, 8,
@@ -545,191 +730,6 @@ FX_DWORD CCodec_FaxDecoder::GetSrcOffset() {
return ret;
}
-FX_BOOL FaxSkipEOL(const uint8_t* src_buf, int bitsize, int& bitpos) {
- int startbit = bitpos;
- while (bitpos < bitsize) {
- int bit = NEXTBIT;
- if (bit) {
- if (bitpos - startbit <= 11) {
- bitpos = startbit;
- }
- return TRUE;
- }
- }
- return FALSE;
-}
-
-FX_BOOL FaxGet1DLine(const uint8_t* src_buf,
- int bitsize,
- int& bitpos,
- uint8_t* dest_buf,
- int columns) {
- bool color = true;
- int startpos = 0;
- while (1) {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- int run_len = 0;
- while (1) {
- int run = FaxGetRun(color ? FaxWhiteRunIns : FaxBlackRunIns, src_buf,
- bitpos, bitsize);
- if (run < 0) {
- while (bitpos < bitsize) {
- int bit = NEXTBIT;
- if (bit) {
- return TRUE;
- }
- }
- return FALSE;
- }
- run_len += run;
- if (run < 64) {
- break;
- }
- }
- if (!color) {
- FaxFillBits(dest_buf, columns, startpos, startpos + run_len);
- }
- startpos += run_len;
- if (startpos >= columns) {
- break;
- }
- color = !color;
- }
- return TRUE;
-}
-
-FX_BOOL FaxG4GetRow(const uint8_t* src_buf,
- int bitsize,
- int& bitpos,
- uint8_t* dest_buf,
- const uint8_t* ref_buf,
- int columns) {
- int a0 = -1;
- bool a0color = true;
- while (1) {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- int a1, a2, b1, b2;
- FaxG4FindB1B2(ref_buf, columns, a0, a0color, b1, b2);
- FX_BOOL bit = NEXTBIT;
- int v_delta = 0;
- if (bit) {
- } else {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- FX_BOOL bit1 = NEXTBIT;
- if (bitpos >= bitsize) {
- return FALSE;
- }
- FX_BOOL bit2 = NEXTBIT;
- if (bit1 && bit2) {
- v_delta = 1;
- } else if (bit1) {
- v_delta = -1;
- } else if (bit2) {
- int run_len1 = 0;
- while (1) {
- int run = FaxGetRun(a0color ? FaxWhiteRunIns : FaxBlackRunIns,
- src_buf, bitpos, bitsize);
- run_len1 += run;
- if (run < 64) {
- break;
- }
- }
- if (a0 < 0) {
- run_len1++;
- }
- a1 = a0 + run_len1;
- if (!a0color) {
- FaxFillBits(dest_buf, columns, a0, a1);
- }
- int run_len2 = 0;
- while (1) {
- int run = FaxGetRun(a0color ? FaxBlackRunIns : FaxWhiteRunIns,
- src_buf, bitpos, bitsize);
- run_len2 += run;
- if (run < 64) {
- break;
- }
- }
- a2 = a1 + run_len2;
- if (a0color) {
- FaxFillBits(dest_buf, columns, a1, a2);
- }
- a0 = a2;
- if (a0 < columns) {
- continue;
- }
- return TRUE;
- } else {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- bit = NEXTBIT;
- if (bit) {
- if (!a0color) {
- FaxFillBits(dest_buf, columns, a0, b2);
- }
- if (b2 >= columns) {
- return TRUE;
- }
- a0 = b2;
- continue;
- } else {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- FX_BOOL bit1 = NEXTBIT;
- if (bitpos >= bitsize) {
- return FALSE;
- }
- FX_BOOL bit2 = NEXTBIT;
- if (bit1 && bit2) {
- v_delta = 2;
- } else if (bit1) {
- v_delta = -2;
- } else if (bit2) {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- bit = NEXTBIT;
- if (bit) {
- v_delta = 3;
- } else {
- v_delta = -3;
- }
- } else {
- if (bitpos >= bitsize) {
- return FALSE;
- }
- bit = NEXTBIT;
- if (bit) {
- bitpos += 3;
- continue;
- } else {
- bitpos += 5;
- return TRUE;
- }
- }
- }
- }
- }
- a1 = b1 + v_delta;
- if (!a0color) {
- FaxFillBits(dest_buf, columns, a0, a1);
- }
- if (a1 >= columns) {
- return TRUE;
- }
- a0 = a1;
- a0color = !a0color;
- }
-}
-
void FaxG4Decode(const uint8_t* src_buf,
FX_DWORD src_size,
int* pbitpos,
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