From b04a53c1bd143ba75720520e6e53708f4a67e779 Mon Sep 17 00:00:00 2001
From: Christof Metzger-Kraus <christof.j.kraus@gmail.com>
Date: Tue, 31 Jul 2018 19:35:45 +0200
Subject: [PATCH] Adding reader for Portable Bitmap files

---
 .gitignore                                    |    3 +-
 src/Utilities/CMakeLists.txt                  |    2 +
 src/Utilities/PortableBitmapReader.cpp        |  107 +
 src/Utilities/PortableBitmapReader.h          |   64 +
 tests/CMakeLists.txt                          |    4 +-
 tests/SourcePath.h.in                         |    1 +
 tests/opal_src/Utilities/CMakeLists.txt       |    1 +
 .../Utilities/PortableBitmapReaderTest.cpp    |   53 +
 tests/opal_src/Utilities/Untitled.pbm         | 3661 +++++++++++++++++
 tests/opal_src/Utilities/Untitled_binary.pbm  |  Bin 0 -> 32050 bytes
 10 files changed, 3894 insertions(+), 2 deletions(-)
 create mode 100644 src/Utilities/PortableBitmapReader.cpp
 create mode 100644 src/Utilities/PortableBitmapReader.h
 create mode 100644 tests/SourcePath.h.in
 create mode 100644 tests/opal_src/Utilities/PortableBitmapReaderTest.cpp
 create mode 100644 tests/opal_src/Utilities/Untitled.pbm
 create mode 100644 tests/opal_src/Utilities/Untitled_binary.pbm

diff --git a/.gitignore b/.gitignore
index c515e6325..6dbeb02b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,7 @@ src/OPALrevision.h
 src/opal
 tests/tools/gtest
 tests/opal_unit_tests
+tests/OpalSourcePath.h
 doc/user_guide/opal_user_guide.bcf
 doc/user_guide/opal_user_guide.idx
 doc/user_guide/opal_user_guide.lof
@@ -24,4 +25,4 @@ doc/user_guide/opal_user_guide.out
 doc/user_guide/opal_user_guide.pdf
 doc/user_guide/opal_user_guide.run.xml
 doc/user_guide/opal_user_guide.synctex.gz
-doc/user_guide/opal_user_guide.toc
\ No newline at end of file
+doc/user_guide/opal_user_guide.toc
diff --git a/src/Utilities/CMakeLists.txt b/src/Utilities/CMakeLists.txt
index 778e70863..1116faf76 100644
--- a/src/Utilities/CMakeLists.txt
+++ b/src/Utilities/CMakeLists.txt
@@ -2,6 +2,7 @@ set (_SRCS
   OpalException.cpp
   OpalFilter.cpp
   OpalSection.cpp
+  PortableBitmapReader.cpp
   RegularExpression.cpp
   Round.cpp
   Timer.cpp
@@ -20,6 +21,7 @@ set (HDRS
     OpalException.h
     OpalFilter.h
     OpalSection.h
+    PortableBitmapReader.h
     RegularExpression.h
     Round.h
     Timer.h
diff --git a/src/Utilities/PortableBitmapReader.cpp b/src/Utilities/PortableBitmapReader.cpp
new file mode 100644
index 000000000..d3d2dc617
--- /dev/null
+++ b/src/Utilities/PortableBitmapReader.cpp
@@ -0,0 +1,107 @@
+#include "Utilities/PortableBitmapReader.h"
+
+#include <iostream>
+#include <fstream>
+#include <sstream>
+
+PortableBitmapReader::PortableBitmapReader(const std::string &input) {
+
+    std::ifstream in(input);
+    readHeader(in);
+    pixels_m.resize(width_m * height_m);
+
+    if (type_m == ASCII) {
+        readImageAscii(in);
+    } else {
+        readImageBinary(in);
+    }
+}
+
+std::string PortableBitmapReader::getNextPart(std::istream &in) {
+    char c;
+    do {
+        c = in.get();
+        if (c == '#') {
+            do {
+                c = in.get();
+            } while (c != '\n');
+        } else if (!(c == ' ' ||
+                     c == '\t' ||
+                     c == '\n' ||
+                     c == '\r')) {
+            in.putback(c);
+            break;
+        }
+    } while (true);
+
+    std::string nextPart;
+    in >> nextPart;
+
+    return nextPart;
+}
+
+void PortableBitmapReader::readHeader(std::istream &in) {
+    std::string magicValue = getNextPart(in);
+
+    if (magicValue == "P1") {
+        type_m = ASCII;
+    } else if (magicValue == "P4") {
+        type_m = BINARY;
+    } else {
+        throw OpalException("PortableBitmapReader::readHeader",
+                            "Unknown magic value: '" + magicValue + "'");
+    }
+
+    {
+        std::string tmp = getNextPart(in);
+        std::istringstream conv;
+        conv.str(tmp);
+        conv >> width_m;
+    }
+
+    {
+        std::string tmp = getNextPart(in);
+        std::istringstream conv;
+        conv.str(tmp);
+        conv >> height_m;
+    }
+}
+
+void PortableBitmapReader::readImageAscii(std::istream &in) {
+    unsigned int size = height_m * width_m;
+    unsigned int i = 0;
+    while (i < size) {
+        char c;
+        in >> c;
+
+        if (!(c == ' ' ||
+              c == '\n' ||
+              c == '\t' ||
+              c == '\r')) {
+            pixels_m[i] = (c == '1');
+            ++ i;
+        }
+
+    }
+}
+
+void PortableBitmapReader::readImageBinary(std::istream &in) {
+    static const unsigned int sizeChar = sizeof(char) * 8;
+
+    unsigned int trueSize = (height_m * width_m);
+    unsigned int size = trueSize / sizeChar;
+    if (size * sizeChar != trueSize)
+        ++ size;
+
+    unsigned int numPixels = 0;
+    for (unsigned int i = 0; i < size; ++ i) {
+        char c;
+        in >> c;
+
+        unsigned int numBits = std::min(sizeChar, trueSize - numPixels);
+
+        for (unsigned int j = numBits; j > 0 ; -- j, ++ numPixels) {
+            pixels_m[numPixels] = ((c >> (numBits - 1)) & 1);
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Utilities/PortableBitmapReader.h b/src/Utilities/PortableBitmapReader.h
new file mode 100644
index 000000000..ef7638e5e
--- /dev/null
+++ b/src/Utilities/PortableBitmapReader.h
@@ -0,0 +1,64 @@
+#ifndef PORTABLEBITMAPRREADER_H
+#define PORTABLEBITMAPRREADER_H
+
+#include "Utilities/OpalException.h"
+
+#include <string>
+#include <vector>
+#include <istream>
+
+class PortableBitmapReader {
+public:
+    PortableBitmapReader(const std::string & input);
+
+    unsigned int getWidth() const;
+    unsigned int getHeight() const;
+
+    bool isBlack(unsigned int i, unsigned int j) const;
+
+private:
+    void readHeader(std::istream &in);
+    void readImageAscii(std::istream &in);
+    void readImageBinary(std::istream &in);
+    std::string getNextPart(std::istream &in);
+
+    unsigned int getIdx(unsigned int h, unsigned int w) const;
+
+    unsigned int width_m;
+    unsigned int height_m;
+
+    enum FileType {
+        ASCII,
+        BINARY
+    };
+
+    FileType type_m;
+
+    // static unsigned int sizeChar_s;
+
+    std::vector<bool> pixels_m;
+};
+
+inline
+unsigned int PortableBitmapReader::getWidth() const {
+    return width_m;
+}
+
+inline
+unsigned int PortableBitmapReader::getHeight() const {
+    return height_m;
+}
+
+inline
+bool PortableBitmapReader::isBlack(unsigned int i, unsigned int j) const {
+    return pixels_m[getIdx(i, j)];
+}
+
+inline
+unsigned int PortableBitmapReader::getIdx(unsigned int h, unsigned int w) const {
+    if (h >= height_m || w >= width_m) throw OpalException("PortableBitmapReader::getIdx",
+                                                           "Pixel number out of bounds");
+    return h * width_m + w;
+}
+
+#endif
\ No newline at end of file
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index cc53315c7..d89c17a06 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -53,6 +53,8 @@ include_directories (${GTEST_INCLUDE_DIRS}
     ${GTEST_INCLUDE_DIRS}
 )
 
+configure_file(SourcePath.h.in ${CMAKE_CURRENT_SOURCE_DIR}/OpalSourcePath.h)
+
 # Check to see if cmake finds the test files
 # MESSAGE(STATUS "unit test src files: ${TEST_SRCS}")
 
@@ -68,4 +70,4 @@ target_link_libraries (
 	${OTHER_CMAKE_EXE_LINKER_FLAGS}
 	${GTEST_BOTH_LIBRARIES}
 	-lpthread
-)
+)
\ No newline at end of file
diff --git a/tests/SourcePath.h.in b/tests/SourcePath.h.in
new file mode 100644
index 000000000..c77dc03ee
--- /dev/null
+++ b/tests/SourcePath.h.in
@@ -0,0 +1 @@
+#define OPAL_SOURCE_DIR "${CMAKE_SOURCE_DIR}"
\ No newline at end of file
diff --git a/tests/opal_src/Utilities/CMakeLists.txt b/tests/opal_src/Utilities/CMakeLists.txt
index 5e992df36..8739341b9 100644
--- a/tests/opal_src/Utilities/CMakeLists.txt
+++ b/tests/opal_src/Utilities/CMakeLists.txt
@@ -1,4 +1,5 @@
 set (_SRCS
+    PortableBitmapReaderTest.cpp
   )
 
 include_directories (
diff --git a/tests/opal_src/Utilities/PortableBitmapReaderTest.cpp b/tests/opal_src/Utilities/PortableBitmapReaderTest.cpp
new file mode 100644
index 000000000..e51518fe8
--- /dev/null
+++ b/tests/opal_src/Utilities/PortableBitmapReaderTest.cpp
@@ -0,0 +1,53 @@
+#include "gtest/gtest.h"
+#include "OpalSourcePath.h"
+
+#include "Utilities/PortableBitmapReader.h"
+#include "opal_test_utilities/SilenceTest.h"
+
+#include <iostream>
+
+TEST(PBMReaderTest, SimpleAsciiTest) {
+    OpalTestUtilities::SilenceTest silencer;
+
+    std::string opalSourcePath = OPAL_SOURCE_DIR;
+    std::string pathToBitmapFile = opalSourcePath + "/tests/opal_src/Utilities/Untitled.pbm";
+    PortableBitmapReader reader(pathToBitmapFile);
+
+    bool pixel = reader.isBlack(111, 300);
+    ASSERT_TRUE(pixel);
+
+    pixel = reader.isBlack(111, 319);
+    ASSERT_TRUE(pixel);
+
+    pixel = reader.isBlack(111, 320);
+    ASSERT_FALSE(pixel);
+
+    pixel = reader.isBlack(199, 300);
+    ASSERT_TRUE(pixel);
+
+    pixel = reader.isBlack(200, 300);
+    ASSERT_FALSE(pixel);
+}
+
+TEST(PBMReaderTest, SimpleBinaryTest) {
+    OpalTestUtilities::SilenceTest silencer;
+
+    std::string opalSourcePath = OPAL_SOURCE_DIR;
+    std::string pathToBitmapFile = opalSourcePath + "/tests/opal_src/Utilities/Untitled_binary.pbm";
+    PortableBitmapReader reader(pathToBitmapFile);
+
+    bool pixel = reader.isBlack(111, 300);
+    ASSERT_TRUE(pixel);
+
+    pixel = reader.isBlack(111, 319);
+    ASSERT_TRUE(pixel);
+
+    pixel = reader.isBlack(111, 320);
+    ASSERT_FALSE(pixel);
+
+    pixel = reader.isBlack(199, 300);
+    ASSERT_TRUE(pixel);
+
+    pixel = reader.isBlack(200, 300);
+    ASSERT_FALSE(pixel);
+}
\ No newline at end of file
diff --git a/tests/opal_src/Utilities/Untitled.pbm b/tests/opal_src/Utilities/Untitled.pbm
new file mode 100644
index 000000000..ba3896d5c
--- /dev/null
+++ b/tests/opal_src/Utilities/Untitled.pbm
@@ -0,0 +1,3661 @@
+P1
+# CREATOR: GIMP PNM Filter Version 1.1
+640 400
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