summaryrefslogtreecommitdiff
path: root/core/fxcodec/codec
diff options
context:
space:
mode:
authorrbpotter <rbpotter@chromium.org>2017-01-12 10:31:43 -0800
committerCommit bot <commit-bot@chromium.org>2017-01-12 10:31:43 -0800
commitdb7647083d0a5cd2221b94faa15c149214d21725 (patch)
tree427c0beeb82796e8e550e672195061186d7db076 /core/fxcodec/codec
parente7fb8eb3e9f220a5f0c852f0238ab8d536a8bc9d (diff)
downloadpdfium-db7647083d0a5cd2221b94faa15c149214d21725.tar.xz
Add postscript path
This patch adds the additional functions required to make postscript printing functional. The most significant additions are are two added compression functions and a new API for setting the postscript level. Not currently called from Chromium, Chromium patch to come. BUG= Review-Url: https://codereview.chromium.org/2612243005
Diffstat (limited to 'core/fxcodec/codec')
-rw-r--r--core/fxcodec/codec/fx_codec.cpp142
-rw-r--r--core/fxcodec/codec/fx_codec_a85_unittest.cpp209
-rw-r--r--core/fxcodec/codec/fx_codec_rle_unittest.cpp195
3 files changed, 544 insertions, 2 deletions
diff --git a/core/fxcodec/codec/fx_codec.cpp b/core/fxcodec/codec/fx_codec.cpp
index 6b6c723388..23171cf3ea 100644
--- a/core/fxcodec/codec/fx_codec.cpp
+++ b/core/fxcodec/codec/fx_codec.cpp
@@ -6,6 +6,7 @@
#include "core/fxcodec/fx_codec.h"
+#include <algorithm>
#include <cmath>
#include <memory>
#include <utility>
@@ -101,14 +102,151 @@ bool CCodec_BasicModule::RunLengthEncode(const uint8_t* src_buf,
uint32_t src_size,
uint8_t** dest_buf,
uint32_t* dest_size) {
- return false;
+ // Check inputs
+ if (!src_buf || !dest_buf || !dest_size || src_size == 0)
+ return false;
+
+ // Edge case
+ if (src_size == 1) {
+ *dest_buf = FX_Alloc(uint8_t, 3);
+ (*dest_buf)[0] = 0;
+ (*dest_buf)[1] = src_buf[0];
+ (*dest_buf)[2] = 128;
+ *dest_size = 3;
+ return true;
+ }
+
+ // Worst case: 1 nonmatch, 2 match, 1 nonmatch, 2 match, etc. This becomes
+ // 4 output chars for every 3 input, plus up to 4 more for the 1-2 chars
+ // rounded off plus the terminating character.
+ uint32_t est_size = 4 * ((src_size + 2) / 3) + 1;
+ *dest_buf = FX_Alloc(uint8_t, est_size);
+
+ // Set up pointers.
+ uint8_t* out = *dest_buf;
+ uint32_t run_start = 0;
+ uint32_t run_end = 1;
+ uint8_t x = src_buf[run_start];
+ uint8_t y = src_buf[run_end];
+ while (run_end < src_size) {
+ uint32_t max_len = std::min((uint32_t)128, src_size - run_start);
+ while (x == y && (run_end - run_start < max_len - 1))
+ y = src_buf[++run_end];
+
+ // Reached end with matched run. Update variables to expected values.
+ if (x == y) {
+ run_end++;
+ if (run_end < src_size)
+ y = src_buf[run_end];
+ }
+ if (run_end - run_start > 1) { // Matched run but not at end of input.
+ out[0] = 257 - (run_end - run_start);
+ out[1] = x;
+ x = y;
+ run_start = run_end;
+ run_end++;
+ if (run_end < src_size)
+ y = src_buf[run_end];
+ out += 2;
+ continue;
+ }
+ // Mismatched run
+ while (x != y && run_end <= run_start + max_len) {
+ out[run_end - run_start] = x;
+ x = y;
+ run_end++;
+ if (run_end == src_size) {
+ if (run_end <= run_start + max_len) {
+ out[run_end - run_start] = x;
+ run_end++;
+ }
+ break;
+ }
+ y = src_buf[run_end];
+ }
+ out[0] = run_end - run_start - 2;
+ out += run_end - run_start;
+ run_start = run_end - 1;
+ }
+ if (run_start < src_size) { // 1 leftover character
+ out[0] = 0;
+ out[1] = x;
+ out += 2;
+ }
+ *out = 128;
+ *dest_size = out + 1 - *dest_buf;
+ return true;
}
bool CCodec_BasicModule::A85Encode(const uint8_t* src_buf,
uint32_t src_size,
uint8_t** dest_buf,
uint32_t* dest_size) {
- return false;
+ // Check inputs.
+ if (!src_buf || !dest_buf || !dest_size)
+ return false;
+
+ if (src_size == 0) {
+ *dest_size = 0;
+ return false;
+ }
+
+ // Worst case: 5 output for each 4 input (plus up to 4 from leftover), plus
+ // 2 character new lines each 75 output chars plus 2 termination chars. May
+ // have fewer if there are special "z" chars.
+ uint32_t est_size = 5 * (src_size / 4) + 4 + src_size / 30 + 2;
+ *dest_buf = FX_Alloc(uint8_t, est_size);
+
+ // Set up pointers.
+ uint8_t* out = *dest_buf;
+ uint32_t pos = 0;
+ uint32_t line_length = 0;
+ while (src_size >= 4 && pos < src_size - 3) {
+ uint32_t val = ((uint32_t)(src_buf[pos]) << 24) +
+ ((uint32_t)(src_buf[pos + 1]) << 16) +
+ ((uint32_t)(src_buf[pos + 2]) << 8) +
+ (uint32_t)(src_buf[pos + 3]);
+ pos += 4;
+ if (val == 0) { // All zero special case
+ *out = 'z';
+ out++;
+ line_length++;
+ } else { // Compute base 85 characters and add 33.
+ for (int i = 4; i >= 0; i--) {
+ out[i] = (uint8_t)(val % 85) + 33;
+ val = val / 85;
+ }
+ out += 5;
+ line_length += 5;
+ }
+ if (line_length >= 75) { // Add a return.
+ *out++ = '\r';
+ *out++ = '\n';
+ line_length = 0;
+ }
+ }
+ if (pos < src_size) { // Leftover bytes
+ uint32_t val = 0;
+ int count = 0;
+ while (pos < src_size) {
+ val += (uint32_t)(src_buf[pos] << (8 * (3 - pos)));
+ count++;
+ pos++;
+ }
+ for (int i = 4; i >= 0; i--) {
+ if (i <= count)
+ out[i] = (uint8_t)(val % 85) + 33;
+ val = val / 85;
+ }
+ out += count + 1;
+ }
+
+ // Terminating characters.
+ out[0] = '~';
+ out[1] = '>';
+ out += 2;
+ *dest_size = out - *dest_buf;
+ return true;
}
#ifdef PDF_ENABLE_XFA
diff --git a/core/fxcodec/codec/fx_codec_a85_unittest.cpp b/core/fxcodec/codec/fx_codec_a85_unittest.cpp
new file mode 100644
index 0000000000..7910881772
--- /dev/null
+++ b/core/fxcodec/codec/fx_codec_a85_unittest.cpp
@@ -0,0 +1,209 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stdint.h>
+
+#include <limits>
+
+#include "core/fxcodec/codec/ccodec_basicmodule.h"
+#include "core/fxcodec/fx_codec.h"
+#include "testing/fx_string_testhelpers.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(fxcodec, A85TestBadInputs) {
+ uint8_t src_buf[4] = {1, 2, 3, 4};
+ uint8_t* dest_buf = nullptr;
+ uint32_t src_size = 4;
+ uint32_t dest_size = 0;
+
+ CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+ EXPECT_TRUE(pEncoders);
+
+ // Error codes, not segvs, should callers pass us a nullptr pointer.
+ EXPECT_FALSE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, nullptr));
+ EXPECT_FALSE(pEncoders->A85Encode(src_buf, src_size, nullptr, &dest_size));
+ EXPECT_FALSE(pEncoders->A85Encode(src_buf, 0, &dest_buf, &dest_size));
+ EXPECT_FALSE(pEncoders->A85Encode(nullptr, src_size, &dest_buf, &dest_size));
+}
+
+// No leftover bytes, just translate 2 sets of symbols.
+TEST(fxcodec, A85TestBasic) {
+ // Make sure really big values don't break.
+ uint8_t src_buf[8] = {1, 2, 3, 4, 255, 255, 255, 255};
+ uint8_t* dest_buf = nullptr;
+ uint32_t src_size = 8;
+ uint32_t dest_size = 0;
+
+ CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+ EXPECT_TRUE(pEncoders);
+
+ // Should succeed.
+ EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size));
+
+ // Should have 5 chars for each set of 4 and 2 terminators.
+ EXPECT_EQ(12u, dest_size);
+ uint8_t expected_out[12] = {33, 60, 78, 63, 43, 115, 56, 87, 45, 33, 126, 62};
+
+ // Check the output
+ for (uint32_t i = 0; i < 12; i++)
+ EXPECT_EQ(dest_buf[i], expected_out[i]) << " at " << i;
+ FX_Free(dest_buf);
+}
+
+// Leftover bytes.
+TEST(fxcodec, A85TestLeftoverBytes) {
+ // 1 Leftover Byte:
+ uint8_t src_buf_1leftover[5] = {1, 2, 3, 4, 255};
+ uint8_t* dest_buf = nullptr;
+ uint32_t src_size = 5;
+ uint32_t dest_size = 0;
+
+ CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+ EXPECT_TRUE(pEncoders);
+
+ // Should succeed
+ EXPECT_TRUE(
+ pEncoders->A85Encode(src_buf_1leftover, src_size, &dest_buf, &dest_size));
+ EXPECT_EQ(9u, dest_size); // 5 chars for first symbol + 2 + 2 terminators.
+ uint8_t expected_out_1leftover[9] = {33, 60, 78, 63, 43, 114, 114, 126, 62};
+
+ // Check the output
+ for (uint32_t i = 0; i < 9; i++)
+ EXPECT_EQ(dest_buf[i], expected_out_1leftover[i]) << " at " << i;
+ FX_Free(dest_buf);
+
+ // 2 Leftover bytes:
+ src_size++;
+ dest_buf = nullptr;
+ dest_size = 0;
+ uint8_t src_buf_2leftover[6] = {1, 2, 3, 4, 255, 254};
+ // Should succeed
+ EXPECT_TRUE(
+ pEncoders->A85Encode(src_buf_2leftover, src_size, &dest_buf, &dest_size));
+ EXPECT_EQ(10u, dest_size); // 5 chars for first symbol + 3 + 2 terminators.
+ uint8_t expected_out_2leftover[10] = {33, 60, 78, 63, 43,
+ 115, 56, 68, 126, 62};
+
+ // Check the output
+ for (uint32_t i = 0; i < 10; i++)
+ EXPECT_EQ(dest_buf[i], expected_out_2leftover[i]) << " at " << i;
+ FX_Free(dest_buf);
+
+ // 3 Leftover bytes:
+ src_size++;
+ dest_buf = nullptr;
+ dest_size = 0;
+ uint8_t src_buf_3leftover[7] = {1, 2, 3, 4, 255, 254, 253};
+ // Should succeed
+ EXPECT_TRUE(
+ pEncoders->A85Encode(src_buf_3leftover, src_size, &dest_buf, &dest_size));
+ EXPECT_EQ(11u, dest_size); // 5 chars for first symbol + 4 + 2 terminators.
+ uint8_t expected_out_3leftover[11] = {33, 60, 78, 63, 43, 115,
+ 56, 77, 114, 126, 62};
+
+ // Check the output
+ for (uint32_t i = 0; i < 11; i++)
+ EXPECT_EQ(dest_buf[i], expected_out_3leftover[i]) << " at " << i;
+ FX_Free(dest_buf);
+}
+
+// Test all zeros comes through as "z".
+TEST(fxcodec, A85TestZeros) {
+ // Make sure really big values don't break.
+ uint8_t src_buf[8] = {1, 2, 3, 4, 0, 0, 0, 0};
+ uint8_t* dest_buf = nullptr;
+ uint32_t src_size = 8;
+ uint32_t dest_size = 0;
+
+ CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+ EXPECT_TRUE(pEncoders);
+
+ // Should succeed.
+ EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size));
+
+ // Should have 5 chars for first set of 4 + 1 for z + 2 terminators.
+ EXPECT_EQ(8u, dest_size);
+ uint8_t expected_out[8] = {33, 60, 78, 63, 43, 122, 126, 62};
+
+ // Check the output
+ for (uint32_t i = 0; i < 8; i++)
+ EXPECT_EQ(dest_buf[i], expected_out[i]) << " at " << i;
+ FX_Free(dest_buf);
+
+ // Should also work if it is at the start:
+ dest_buf = nullptr;
+ dest_size = 0;
+ uint8_t src_buf_2[8] = {0, 0, 0, 0, 1, 2, 3, 4};
+
+ // Should succeed.
+ EXPECT_TRUE(pEncoders->A85Encode(src_buf_2, src_size, &dest_buf, &dest_size));
+
+ // Should have 5 chars for set of 4 + 1 for z + 2 terminators.
+ EXPECT_EQ(8u, dest_size);
+ uint8_t expected_out_2[8] = {122, 33, 60, 78, 63, 43, 126, 62};
+
+ // Check the output
+ for (uint32_t i = 0; i < 8; i++)
+ EXPECT_EQ(dest_buf[i], expected_out_2[i]) << " at " << i;
+ FX_Free(dest_buf);
+
+ // Try with 2 leftover zero bytes. Make sure we don't get a "z".
+ src_size = 6; // Cut off the last 2 zeros.
+ dest_buf = nullptr;
+ dest_size = 0;
+
+ // Should succeed.
+ EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size));
+
+ // Should have 5 chars for set of 4 + 3 for last 2 + 2 terminators.
+ EXPECT_EQ(10u, dest_size);
+ uint8_t expected_out_leftover[10] = {33, 60, 78, 63, 43, 33, 33, 33, 126, 62};
+
+ // Check the output
+ for (uint32_t i = 0; i < 10; i++)
+ EXPECT_EQ(dest_buf[i], expected_out_leftover[i]) << " at " << i;
+ FX_Free(dest_buf);
+}
+
+// Make sure we get returns in the expected locations.
+TEST(fxcodec, A85TestLineBreaks) {
+ // Make sure really big values don't break.
+ uint8_t src_buf[131] = {0};
+ // 1 full line + most of a line of normal symbols.
+ for (int k = 0; k < 116; k += 4) {
+ src_buf[k] = 1;
+ src_buf[k + 1] = 2;
+ src_buf[k + 2] = 3;
+ src_buf[k + 3] = 4;
+ }
+ // Fill in the end, leaving an all zero gap + 3 extra zeros at the end.
+ for (int k = 120; k < 128; k++) {
+ src_buf[k] = 1;
+ src_buf[k + 1] = 2;
+ src_buf[k + 2] = 3;
+ src_buf[k + 3] = 4;
+ }
+ uint8_t* dest_buf = nullptr;
+ uint32_t src_size = 131;
+ uint32_t dest_size = 0;
+
+ CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+ EXPECT_TRUE(pEncoders);
+
+ // Should succeed.
+ EXPECT_TRUE(pEncoders->A85Encode(src_buf, src_size, &dest_buf, &dest_size));
+
+ // Should have 75 chars in the first row plus 2 char return,
+ // 76 chars in the second row plus 2 char return,
+ // and 9 chars in the last row with 2 terminators.
+ EXPECT_EQ(166u, dest_size);
+
+ // Check for the returns.
+ EXPECT_EQ(dest_buf[75], 13);
+ EXPECT_EQ(dest_buf[76], 10);
+ EXPECT_EQ(dest_buf[153], 13);
+ EXPECT_EQ(dest_buf[154], 10);
+
+ FX_Free(dest_buf);
+}
diff --git a/core/fxcodec/codec/fx_codec_rle_unittest.cpp b/core/fxcodec/codec/fx_codec_rle_unittest.cpp
new file mode 100644
index 0000000000..94d87cde92
--- /dev/null
+++ b/core/fxcodec/codec/fx_codec_rle_unittest.cpp
@@ -0,0 +1,195 @@
+// Copyright 2016 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <stdint.h>
+
+#include <limits>
+
+#include "core/fpdfapi/parser/fpdf_parser_decode.h"
+#include "core/fxcodec/codec/ccodec_basicmodule.h"
+#include "core/fxcodec/fx_codec.h"
+#include "testing/fx_string_testhelpers.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(fxcodec, RLETestBadInputs) {
+ uint8_t src_buf[1] = {1};
+ uint8_t* dest_buf = nullptr;
+ uint32_t src_size = 4;
+ uint32_t dest_size = 0;
+
+ CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+ EXPECT_TRUE(pEncoders);
+
+ // Error codes, not segvs, should callers pass us a nullptr pointer.
+ EXPECT_FALSE(
+ pEncoders->RunLengthEncode(src_buf, src_size, &dest_buf, nullptr));
+ EXPECT_FALSE(
+ pEncoders->RunLengthEncode(src_buf, src_size, nullptr, &dest_size));
+ EXPECT_FALSE(pEncoders->RunLengthEncode(src_buf, 0, &dest_buf, &dest_size));
+ EXPECT_FALSE(
+ pEncoders->RunLengthEncode(nullptr, src_size, &dest_buf, &dest_size));
+}
+
+// Check length 1 input works. Check terminating character is applied.
+TEST(fxcodec, RLETestShortInput) {
+ uint8_t src_buf[1] = {1};
+ uint8_t* dest_buf = nullptr;
+ uint32_t src_size = 1;
+ uint32_t dest_size = 0;
+
+ CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+ EXPECT_TRUE(pEncoders);
+
+ EXPECT_TRUE(
+ pEncoders->RunLengthEncode(src_buf, src_size, &dest_buf, &dest_size));
+ EXPECT_EQ(3u, dest_size);
+ EXPECT_EQ(dest_buf[0], 0);
+ EXPECT_EQ(dest_buf[1], 1);
+ EXPECT_EQ(dest_buf[2], 128);
+
+ FX_Free(dest_buf);
+}
+
+// Check a few basic cases (2 matching runs in a row, matching run followed
+// by a nonmatching run, and nonmatching run followed by a matching run).
+TEST(fxcodec, RLETestNormalInputs) {
+ // Match, match
+ uint8_t src_buf_1[10] = {2, 2, 2, 2, 4, 4, 4, 4, 4, 4};
+
+ // Match, nonmatch
+ uint8_t src_buf_2[10] = {2, 2, 2, 2, 1, 2, 3, 4, 5, 6};
+
+ // Nonmatch, match
+ uint8_t src_buf_3[10] = {1, 2, 3, 4, 5, 3, 3, 3, 3, 3};
+
+ uint32_t src_size = 10;
+ uint32_t dest_size = 0;
+ uint8_t* dest_buf = nullptr;
+
+ CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+ EXPECT_TRUE(pEncoders);
+
+ // Case 1:
+ EXPECT_TRUE(
+ pEncoders->RunLengthEncode(src_buf_1, src_size, &dest_buf, &dest_size));
+ uint8_t* decoded_buf = nullptr;
+ uint32_t decoded_size = 0;
+ RunLengthDecode(dest_buf, dest_size, decoded_buf, decoded_size);
+ EXPECT_EQ(decoded_size, src_size);
+ for (uint32_t i = 0; i < src_size; i++)
+ EXPECT_EQ(decoded_buf[i], src_buf_1[i]) << " at " << i;
+ FX_Free(dest_buf);
+ FX_Free(decoded_buf);
+
+ // Case 2:
+ dest_buf = nullptr;
+ dest_size = 0;
+ EXPECT_TRUE(
+ pEncoders->RunLengthEncode(src_buf_2, src_size, &dest_buf, &dest_size));
+ decoded_buf = nullptr;
+ decoded_size = 0;
+ RunLengthDecode(dest_buf, dest_size, decoded_buf, decoded_size);
+ EXPECT_EQ(decoded_size, src_size);
+ for (uint32_t i = 0; i < src_size; i++)
+ EXPECT_EQ(decoded_buf[i], src_buf_2[i]) << " at " << i;
+ FX_Free(dest_buf);
+ FX_Free(decoded_buf);
+
+ // Case 3:
+ dest_buf = nullptr;
+ dest_size = 0;
+ EXPECT_TRUE(
+ pEncoders->RunLengthEncode(src_buf_3, src_size, &dest_buf, &dest_size));
+ decoded_buf = nullptr;
+ decoded_size = 0;
+ RunLengthDecode(dest_buf, dest_size, decoded_buf, decoded_size);
+ EXPECT_EQ(decoded_size, src_size);
+ for (uint32_t i = 0; i < src_size; i++)
+ EXPECT_EQ(decoded_buf[i], src_buf_3[i]) << " at " << i;
+ FX_Free(dest_buf);
+ FX_Free(decoded_buf);
+}
+
+// Check that runs longer than 128 are broken up properly, both matched and
+// nonmatched.
+TEST(fxcodec, RLETestFullLengthInputs) {
+ // Match, match
+ uint8_t src_buf_1[260] = {1};
+
+ // Match, nonmatch
+ uint8_t src_buf_2[260] = {2};
+ for (uint16_t i = 128; i < 260; i++)
+ src_buf_2[i] = (uint8_t)(i - 125);
+
+ // Nonmatch, match
+ uint8_t src_buf_3[260] = {3};
+ for (uint8_t i = 0; i < 128; i++)
+ src_buf_3[i] = i;
+
+ // Nonmatch, nonmatch
+ uint8_t src_buf_4[260];
+ for (uint16_t i = 0; i < 260; i++)
+ src_buf_4[i] = (uint8_t)(i);
+
+ uint32_t src_size = 260;
+ uint32_t dest_size = 0;
+ uint8_t* dest_buf = nullptr;
+
+ CCodec_BasicModule* pEncoders = CCodec_ModuleMgr().GetBasicModule();
+ EXPECT_TRUE(pEncoders);
+
+ // Case 1:
+ EXPECT_TRUE(
+ pEncoders->RunLengthEncode(src_buf_1, src_size, &dest_buf, &dest_size));
+ uint8_t* decoded_buf = nullptr;
+ uint32_t decoded_size = 0;
+ RunLengthDecode(dest_buf, dest_size, decoded_buf, decoded_size);
+ EXPECT_EQ(decoded_size, src_size);
+ for (uint32_t i = 0; i < src_size; i++)
+ EXPECT_EQ(decoded_buf[i], src_buf_1[i]) << " at " << i;
+ FX_Free(dest_buf);
+ FX_Free(decoded_buf);
+
+ // Case 2:
+ dest_buf = nullptr;
+ dest_size = 0;
+ EXPECT_TRUE(
+ pEncoders->RunLengthEncode(src_buf_2, src_size, &dest_buf, &dest_size));
+ decoded_buf = nullptr;
+ decoded_size = 0;
+ RunLengthDecode(dest_buf, dest_size, decoded_buf, decoded_size);
+ EXPECT_EQ(decoded_size, src_size);
+ for (uint32_t i = 0; i < src_size; i++)
+ EXPECT_EQ(decoded_buf[i], src_buf_2[i]) << " at " << i;
+ FX_Free(dest_buf);
+ FX_Free(decoded_buf);
+
+ // Case 3:
+ dest_buf = nullptr;
+ dest_size = 0;
+ EXPECT_TRUE(
+ pEncoders->RunLengthEncode(src_buf_3, src_size, &dest_buf, &dest_size));
+ decoded_buf = nullptr;
+ decoded_size = 0;
+ RunLengthDecode(dest_buf, dest_size, decoded_buf, decoded_size);
+ EXPECT_EQ(decoded_size, src_size);
+ for (uint32_t i = 0; i < src_size; i++)
+ EXPECT_EQ(decoded_buf[i], src_buf_3[i]) << " at " << i;
+ FX_Free(dest_buf);
+ FX_Free(decoded_buf);
+
+ // Case 4:
+ dest_buf = nullptr;
+ dest_size = 0;
+ EXPECT_TRUE(
+ pEncoders->RunLengthEncode(src_buf_4, src_size, &dest_buf, &dest_size));
+ decoded_buf = nullptr;
+ decoded_size = 0;
+ RunLengthDecode(dest_buf, dest_size, decoded_buf, decoded_size);
+ EXPECT_EQ(decoded_size, src_size);
+ for (uint32_t i = 0; i < src_size; i++)
+ EXPECT_EQ(decoded_buf[i], src_buf_4[i]) << " at " << i;
+ FX_Free(dest_buf);
+ FX_Free(decoded_buf);
+}