fix build

imgui.ini

@@ -14,7 +14,7 @@ Collapsed=0
 
 [Window][Main]
 Pos=0,0
-Size=1654,1186
+Size=1673,1237
 Collapsed=0
 
 [Window][Help]

lib/uuid.cpp

@@ -1,35 +0,0 @@
-#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

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

main.cpp

@@ -1,14 +1,3 @@
-// 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>
@@ -17,6 +6,7 @@
 #include "lib/backends/imgui_impl_sdl2.h"
 #include "lib/imgui.h"
 #include "lib/imgui_internal.h"
+#include <cstdint>
 #include <iostream>
 #include <stdexcept>
 #include <stdio.h>
@@ -52,14 +42,17 @@ struct Texture
 {
     ImTextureID texture;
     ImVec2 size;
+    int channels;
 };
 
+static uint8_t* image = nullptr;
+
 Texture LoadTexture(const char * path)
 {
     const int channelCount = 4;
     int imageFileChannelCount;
     int width, height;
-    uint8_t *image = (uint8_t *)stbi_load(path, &width, &height, &imageFileChannelCount, channelCount);
+    image = (uint8_t *)stbi_load(path, &width, &height, &imageFileChannelCount, channelCount);
     if (image == NULL)
     {
         fprintf(stderr, "%s\nFailed to open %s\n", stbi_failure_reason(), path);
@@ -78,16 +71,57 @@ Texture LoadTexture(const char * path)
     Texture t;
     t.texture = (void*)(uintptr_t)(textureHandle);
     t.size = ImVec2((float)width,(float)height);
+    t.channels = channelCount;
 
-    stbi_image_free(image);
     return t;
 }
 
+Texture ReloadTexture(ImTextureID id, int width, int height) {
+    GLuint tid = (GLuint)(uintptr_t)id;
+    glDeleteTextures((GLsizei)1, &tid);
 
-static bool init = true;
+    GLenum dataFormat = GL_RGBA;
-static bool showHelp = false;
+    GLuint textureHandle;
-static int mode = 0;
+    glGenTextures(1, &textureHandle);
-const int maxAnnotatedTexels = 10000;
+    glBindTexture(GL_TEXTURE_2D, textureHandle);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, dataFormat, GL_UNSIGNED_BYTE, image);
+
+    Texture t;
+    t.texture = (void*)(uintptr_t)(textureHandle);
+    t.size = ImVec2((float)width,(float)height);
+
+    return t;
+}
+
+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; 
+  unsigned char *tempBuffer = new unsigned char[sizeBuffer];
+
+  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 i = 0; i < channels; i++)
+        tempBuffer[nidx + i] = image[idx + i];
+
+      nidx = nidx + 4;
+    }
+  }
+
+  memcpy(image, tempBuffer, sizeBuffer);
+  delete[] tempBuffer;
+}
+
+
+const int MAX_ANNOATED_TEXELS = 10000;
 
 // Main code
 int main(int argc, char* argv[]) {
@@ -99,8 +133,10 @@ int main(int argc, char* argv[]) {
   }
 
   bool TOOLTIP_ENABLED = false;
-  bool GRID_ENABLED = true;
+  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)
@@ -154,7 +190,6 @@ int main(int argc, char* argv[]) {
 
   // Setup Dear ImGui context
   IMGUI_CHECKVERSION();
-
   ImGui::CreateContext();
   ImGuiIO &io = ImGui::GetIO();
   (void)io;
@@ -163,20 +198,15 @@ 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;
 
-  if (init) {
-    init = false;
   try {
     auto args = argparse::parse<Args>(argc, argv, true);
     t = LoadTexture(args.fpath.c_str());
@@ -184,13 +214,11 @@ int main(int argc, char* argv[]) {
     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;
@@ -217,10 +245,14 @@ int main(int argc, char* argv[]) {
               AA_ENABLED = !AA_ENABLED;
               break;
             case SDL_SCANCODE_H:
-              showHelp = !showHelp;
+              SHOW_HELP = !SHOW_HELP;
               break;
             case SDL_SCANCODE_D:
-              mode = (mode + 1) % 5;
+              MODE = (MODE + 1) % 5;
+              break;
+            case SDL_SCANCODE_R:
+              RotateImage(t);
+              t = ReloadTexture(t.texture, t.size.y, t.size.x);
               break;
             case SDL_SCANCODE_Q:
               done = true;
@@ -286,18 +318,18 @@ 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), maxAnnotatedTexels);
+            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::Arrow().UsePreset(ImGuiTexInspect::Arrow::NormalMap), MAX_ANNOATED_TEXELS);
             break;
           case 2:
-            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::HexString), maxAnnotatedTexels);
+            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::HexString), MAX_ANNOATED_TEXELS);
             break;
           case 3:
-            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::BytesDec), maxAnnotatedTexels);
+            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::BytesDec), MAX_ANNOATED_TEXELS);
             break;
           case 4:
-            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::Floats), maxAnnotatedTexels);
+            ImGuiTexInspect::DrawAnnotations(ImGuiTexInspect::ValueText(ImGuiTexInspect::ValueText::Format::Floats), MAX_ANNOATED_TEXELS);
             break;
           default:
             break;
@@ -310,19 +342,29 @@ int main(int argc, char* argv[]) {
       ImGui::PopStyleVar();
       ImGui::PopStyleVar();
 
-      if (showHelp){
+      if (SHOW_HELP){
         ImGui::OpenPopup("HelpPopup");
-        showHelp = !showHelp;
+        SHOW_HELP = !SHOW_HELP;
       }
+
       if (ImGui::BeginPopup("HelpPopup")) {
         ImGui::Text("tview Help");
         ImGui::Separator();
+        ImGui::Text("r - rotate 90 deg clockwise");
         ImGui::Text("g - toggle grid");
         ImGui::Text("a - toggle filtering");
         ImGui::Text("t - toggle tooltip");
         ImGui::Text("d - cycle pixel detail mode");
-        ImGui::Text("q - quit");
+        ImGui::Separator();
+        ImGui::Text("modes:");
+        ImGui::Text("\tOff");
+        ImGui::Text("\tGradient Arrow");
+        ImGui::Text("\tHex Code");
+        ImGui::Text("\tRGB Values");
+        ImGui::Text("\tFloat Values");
+        ImGui::Separator();
         ImGui::Text("h - show help popup");
+        ImGui::Text("q - quit");
         ImGui::Separator();
         ImGui::Text("click anywhere to continue");
         ImGui::EndPopup();
@@ -339,6 +381,10 @@ int main(int argc, char* argv[]) {
     SDL_GL_SwapWindow(window);
   }
 
+  if (image != nullptr) {
+    stbi_image_free(image);
+  }
+
   // Cleanup
   ImGui_ImplOpenGL3_Shutdown();
   ImGui_ImplSDL2_Shutdown();