lib/uuid.cpp

@@ -0,0 +1,35 @@
+#include "uuid.h"
+
+namespace uuid {
+static std::random_device rd;
+static std::mt19937 gen(rd());
+static std::uniform_int_distribution<> dis(0, 15);
+static std::uniform_int_distribution<> dis2(8, 11);
+
+std::string generate_uuid_v4() {
+  std::stringstream ss;
+  int i;
+  ss << std::hex;
+  for (i = 0; i < 8; i++) {
+    ss << dis(gen);
+  }
+  ss << "-";
+  for (i = 0; i < 4; i++) {
+    ss << dis(gen);
+  }
+  ss << "-4";
+  for (i = 0; i < 3; i++) {
+    ss << dis(gen);
+  }
+  ss << "-";
+  ss << dis2(gen);
+  for (i = 0; i < 3; i++) {
+    ss << dis(gen);
+  }
+  ss << "-";
+  for (i = 0; i < 12; i++) {
+    ss << dis(gen);
+  };
+  return ss.str();
+}
+} // namespace uuid

lib/uuid.h

@@ -0,0 +1,12 @@
+#ifndef UUID_H
+#define UUID_H
+
+#include <random>
+#include <sstream>
+#include <string>
+
+namespace uuid {
+std::string generate_uuid_v4();
+}
+
+#endif // UUID_H

main.cpp

@@ -1,3 +1,14 @@
+// Dear ImGui: standalone example application for SDL2 + OpenGL
+// (SDL is a cross-platform general purpose library for handling windows,
+// inputs, OpenGL/Vulkan/Metal graphics context creation, etc.)
+
+// Learn about Dear ImGui:
+// - FAQ                  https://dearimgui.com/faq
+// - Getting Started      https://dearimgui.com/getting-started
+// - Documentation        https://dearimgui.com/docs (same as your local docs/
+// folder).
+// - Introduction, links and more at the top of imgui.cpp
+
 #include <SDL2/SDL_events.h>
 #include <SDL2/SDL_scancode.h>
 #include <cstddef>
@@ -95,33 +106,43 @@ Texture ReloadTexture(ImTextureID id, int width, int height) {
     return t;
 }
 
+void rotate90()
+{
+}
+
 void RotateImage(Texture t) {
   int height = t.size.y;
   int width = t.size.x;
   int channels = t.channels;
 
-  const unsigned int sizeBuffer = width * height * channels; 
+    const unsigned int sizeBuffer = width * height * channels; 
-  unsigned char *tempBuffer = new unsigned char[sizeBuffer];
+    unsigned char *tempBuffer = new unsigned char[sizeBuffer];
 
-  int nidx = 0;
+
-  for (int x = 0; x < width; x++)
+    int nidx = 0;
-  {
+    for (int x = 0; x < width; x++)
-    for (int y = height - 1; y >= 0; y--)
     {
-      int idx = (x + y * width) * channels;
+        for (int y = height - 1; y >= 0; y--)
-      for (int i = 0; i < channels; i++)
+        {
-        tempBuffer[nidx + i] = image[idx + i];
+          int idx = (x + y * width) * channels;
+          for (int i = 0; i < channels; i++)
+            tempBuffer[nidx + i] = image[idx + i];
 
-      nidx = nidx + 4;
+          nidx = nidx + 4;
+        }
     }
-  }
 
-  memcpy(image, tempBuffer, sizeBuffer);
+    // Copy rotated pixels
-  delete[] tempBuffer;
+
+    memcpy(image, tempBuffer, sizeBuffer);
+    delete[] tempBuffer;
 }
 
 
-const int MAX_ANNOATED_TEXELS = 10000;
+static bool init = true;
+static bool showHelp = false;
+static int mode = 0;
+const int maxAnnotatedTexels = 10000;
 
 // Main code
 int main(int argc, char* argv[]) {
@@ -135,8 +156,6 @@ int main(int argc, char* argv[]) {
   bool TOOLTIP_ENABLED = false;
   bool GRID_ENABLED = false;
   bool AA_ENABLED = true;
-  bool SHOW_HELP = false;
-  int MODE = 0;
 
   // Decide GL+GLSL versions
 #if defined(IMGUI_IMPL_OPENGL_ES2)
@@ -190,6 +209,7 @@ int main(int argc, char* argv[]) {
 
   // Setup Dear ImGui context
   IMGUI_CHECKVERSION();
+
   ImGui::CreateContext();
   ImGuiIO &io = ImGui::GetIO();
   (void)io;
@@ -198,27 +218,34 @@ int main(int argc, char* argv[]) {
   ImGuiTexInspect::ImplOpenGL3_Init(); // Or DirectX 11 equivalent (check your chosen backend header file)
   ImGuiTexInspect::Init();
   ImGuiTexInspect::CreateContext();
+
   ImGui::StyleColorsDark();
+
   ImGuiStyle &style = ImGui::GetStyle();
+
   ImGui_ImplSDL2_InitForOpenGL(window, gl_context);
   ImGui_ImplOpenGL3_Init(glsl_version);
 
   ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
-  Texture t;
-  auto flags = ImGuiTexInspect::InspectorFlags_FillVertical | ImGuiTexInspect::InspectorFlags_FillHorizontal;
 
-  try {
+  Texture t;
-    auto args = argparse::parse<Args>(argc, argv, true);
+
-    t = LoadTexture(args.fpath.c_str());
+  if (init) {
-  } catch (const std::runtime_error &e) {
+    init = false;
-    std::cerr << "failed to parse arguments: " << e.what() << std::endl;
+    try {
-    return -1;
+      auto args = argparse::parse<Args>(argc, argv, true);
+      t = LoadTexture(args.fpath.c_str());
+    } catch (const std::runtime_error &e) {
+      std::cerr << "failed to parse arguments: " << e.what() << std::endl;
+      return -1;
+    }
   }
 
   // Main loop
   bool done = false;
   while (!done)
   {
+    auto flags = ImGuiTexInspect::InspectorFlags_FillVertical | ImGuiTexInspect::InspectorFlags_FillHorizontal;
 
     // Poll and handle events (inputs, window resize, etc.)
     SDL_Event event;
@@ -245,10 +272,10 @@ int main(int argc, char* argv[]) {
               AA_ENABLED = !AA_ENABLED;
               break;
             case SDL_SCANCODE_H:
-              SHOW_HELP = !SHOW_HELP;
+              showHelp = !showHelp;
               break;
             case SDL_SCANCODE_D:
-              MODE = (MODE + 1) % 5;
+              mode = (mode + 1) % 5;
               break;
             case SDL_SCANCODE_R:
               RotateImage(t);
@@ -318,18 +345,18 @@ int main(int argc, char* argv[]) {
             CurrentInspector_SetFlags(ImGuiTexInspect::InspectorFlags_NoForceFilterNearest);
         }
 
-        switch(MODE) {
+        switch(mode) {
           case 1:
-            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::Arrow().UsePreset(ImGuiTexInspect::Arrow::NormalMap), MAX_ANNOATED_TEXELS);
+            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::Arrow().UsePreset(ImGuiTexInspect::Arrow::NormalMap), maxAnnotatedTexels);
             break;
           case 2:
-            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::HexString), MAX_ANNOATED_TEXELS);
+            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::HexString), maxAnnotatedTexels);
             break;
           case 3:
-            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::BytesDec), MAX_ANNOATED_TEXELS);
+            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::BytesDec), maxAnnotatedTexels);
             break;
           case 4:
-            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::Floats), MAX_ANNOATED_TEXELS);
+            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::Floats), maxAnnotatedTexels);
             break;
           default:
             break;
@@ -342,11 +369,10 @@ int main(int argc, char* argv[]) {
       ImGui::PopStyleVar();
       ImGui::PopStyleVar();
 
-      if (SHOW_HELP){
+      if (showHelp){
         ImGui::OpenPopup("HelpPopup");
-        SHOW_HELP = !SHOW_HELP;
+        showHelp = !showHelp;
       }
-
       if (ImGui::BeginPopup("HelpPopup")) {
         ImGui::Text("tview Help");
         ImGui::Separator();