Merge branch 'fonts'

config/checkstyle/checkstyle.xml

@@ -164,10 +164,6 @@
         <!-- See https://checkstyle.org/config_coding.html -->
         <module name="EmptyStatement"/>
         <module name="EqualsHashCode"/>
-        <module name="HiddenField" >
-            <property name="ignoreSetter" value="true" />
-            <property name="ignoreConstructorParameter" value="true" />
-        </module>
         <module name="IllegalInstantiation"/>
         <module name="InnerAssignment"/>
         <module name="MagicNumber"/>

imgui-binding/src/main/java/imgui/ImDestroyable.java

@@ -0,0 +1,9 @@
+package imgui;
+
+/**
+ * While implementing this interface, class could be manually destroyed (free allocated memory on the JNI side).
+ * Read javadoc and "BINDING NOTICE" for specific cases.
+ */
+interface ImDestroyable {
+    void destroy();
+}

imgui-binding/src/main/java/imgui/ImDrawData.java

@@ -6,6 +6,7 @@ import java.nio.ByteOrder;
 
 /**
  * All draw data to render a Dear ImGui frame.
+ * <p>
  * BINDING NOTICE: DO NOT TRY TO MODIFY FIELDS OF THIS CLASS MANUALLY! You should only access their values after {@link ImGui#render()} call.
  */
 public final class ImDrawData {

imgui-binding/src/main/java/imgui/ImFont.java

@@ -0,0 +1,203 @@
+package imgui;
+
+/**
+ * Font runtime data and rendering
+ * ImFontAtlas automatically loads a default embedded font for you when you call GetTexDataAsAlpha8() or GetTexDataAsRGBA32().
+ */
+public final class ImFont implements ImDestroyable {
+    final long ptr;
+
+    private ImFontGlyph fallbackGlyph = null;
+
+    /**
+     * This class will create a native structure.
+     * Call {@link #destroy()} method to manually free used memory.
+     */
+    public ImFont() {
+        ImGui.touch();
+        ptr = nCreate();
+    }
+
+    ImFont(final long ptr) {
+        this.ptr = ptr;
+    }
+
+    @Override
+    public void destroy() {
+        nDestroy(ptr);
+    }
+
+    /*JNI
+        #include <imgui.h>
+        #include "jni_common.h"
+
+        jfieldID imFontPtrID;
+
+        #define IM_FONT ((ImFont*)env->GetLongField(object, imFontPtrID))
+     */
+
+    static native void nInit(); /*
+        jclass jImFontClass = env->FindClass("imgui/ImFont");
+        imFontPtrID = env->GetFieldID(jImFontClass, "ptr", "J");
+    */
+
+    private native long nCreate(); /*
+        ImFont* imFont = new ImFont();
+        return (long)imFont;
+    */
+
+    private native void nDestroy(long ptr); /*
+        delete (ImFont*)ptr;
+    */
+
+    // TODO IndexAdvanceX
+
+    /**
+     * = FallbackGlyph->AdvanceX
+     */
+    public native float getFallbackAdvanceX(); /*
+        return IM_FONT->FallbackAdvanceX;
+    */
+
+    /**
+     * = FallbackGlyph->AdvanceX
+     */
+    public native void setFallbackAdvanceX(float fallbackAdvanceX); /*
+        IM_FONT->FallbackAdvanceX = fallbackAdvanceX;
+    */
+
+    /**
+     * Height of characters/line, set during loading (don't change after loading)
+     */
+    public native float getFontSize(); /*
+        return IM_FONT->FontSize;
+    */
+
+    // TODO IndexLookup, Glyphs
+
+    /**
+     * = FindGlyph(FontFallbackChar)
+     */
+    public ImFontGlyph getFallbackGlyph() {
+        if (fallbackGlyph == null) {
+            fallbackGlyph = new ImFontGlyph(nGetFallbackGlyphPtr());
+        }
+        return fallbackGlyph;
+    }
+
+    private native long nGetFallbackGlyphPtr(); /*
+        return (long)IM_FONT->FallbackGlyph;
+    */
+
+    /**
+     * Offset font rendering by xx pixels
+     */
+    public native void getDisplayOffset(ImVec2 dstImVec2); /*
+        Jni::ImVec2Cpy(env, &IM_FONT->DisplayOffset, dstImVec2);
+    */
+
+    /**
+     * Offset font rendering by xx pixels
+     */
+    public native void setDisplayOffset(float x, float y); /*
+        IM_FONT->DisplayOffset.x = x;
+        IM_FONT->DisplayOffset.y = y;
+    */
+
+    // TODO ContainerAtlas, ConfigData
+
+    /**
+     * Number of ImFontConfig involved in creating this font.
+     * Bigger than 1 when merging multiple font sources into one ImFont.
+     */
+    public native short getConfigDataCount(); /*
+        return IM_FONT->ConfigDataCount;
+    */
+
+    /**
+     * Replacement character if a glyph isn't found.
+     */
+    public native short getFallbackChar(); /*
+        return IM_FONT->FallbackChar;
+    */
+
+    /**
+     * Character used for ellipsis rendering.
+     */
+    public native short getEllipsisChar(); /*
+        return IM_FONT->EllipsisChar;
+    */
+
+    /**
+     * Character used for ellipsis rendering.
+     */
+    public native void setEllipsisChar(short ellipsisChar); /*
+        IM_FONT->EllipsisChar = (ImWchar)ellipsisChar;
+    */
+
+    /**
+     * Base font scale, multiplied by the per-window font scale which you can adjust with SetWindowFontScale()
+     */
+    public native float getScale(); /*
+        return IM_FONT->Scale;
+    */
+
+    /**
+     * Base font scale, multiplied by the per-window font scale which you can adjust with SetWindowFontScale()
+     */
+    public native void setScale(float scale); /*
+        IM_FONT->Scale = scale;
+    */
+
+    /**
+     * Ascent: distance from top to bottom of e.g. 'A' [0..FontSize]
+     */
+    public native float getAscent(); /*
+        return IM_FONT->Ascent;
+    */
+
+    /**
+     * Ascent: distance from top to bottom of e.g. 'A' [0..FontSize]
+     */
+    public native void setAscent(float ascent); /*
+        IM_FONT->Ascent = ascent;
+    */
+
+    /**
+     * Ascent: distance from top to bottom of e.g. 'A' [0..FontSize]
+     */
+    public native float getDescent(); /*
+        return IM_FONT->Descent;
+    */
+
+    /**
+     * Ascent: distance from top to bottom of e.g. 'A' [0..FontSize]
+     */
+    public native void setDescent(float descent); /*
+        IM_FONT->Descent = descent;
+    */
+
+    /**
+     * Total surface in pixels to get an idea of the font rasterization/texture cost (not exact, we approximate the cost of padding between glyphs)
+     */
+    public native int getMetricsTotalSurface(); /*
+        return IM_FONT->MetricsTotalSurface;
+    */
+
+    /**
+     * Total surface in pixels to get an idea of the font rasterization/texture cost (not exact, we approximate the cost of padding between glyphs)
+     */
+    public native void setMetricsTotalSurface(int metricsTotalSurface); /*
+        IM_FONT->MetricsTotalSurface = metricsTotalSurface;
+    */
+
+    public native boolean getDirtyLookupTables(); /*
+        return IM_FONT->DirtyLookupTables;
+    */
+
+    public native void setDirtyLookupTables(boolean dirtyLookupTables); /*
+        IM_FONT->DirtyLookupTables = dirtyLookupTables;
+    */
+
+    // TODO methods
+}

imgui-binding/src/main/java/imgui/ImFontAtlas.java

@@ -0,0 +1,548 @@
+package imgui;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+
+/**
+ * Load and rasterize multiple TTF/OTF fonts into a same texture. The font atlas will build a single texture holding:
+ *  - One or more fonts.
+ *  - Custom graphics data needed to render the shapes needed by Dear ImGui.
+ *  - Mouse cursor shapes for software cursor rendering (unless setting 'Flags |= ImFontAtlasFlags_NoMouseCursors' in the font atlas).
+ * It is the user-code responsibility to setup/build the atlas, then upload the pixel data into a texture accessible by your graphics api.
+ *  - Optionally, call any of the AddFont*** functions. If you don't call any, the default font embedded in the code will be loaded for you.
+ *  - Call GetTexDataAsAlpha8() or GetTexDataAsRGBA32() to build and retrieve pixels data.
+ *  - Upload the pixels data into a texture within your graphics system (see imgui_impl_xxxx.cpp examples)
+ *  - Call SetTexID(my_tex_id); and pass the pointer/identifier to your texture in a format natural to your graphics API.
+ *    This value will be passed back to you during rendering to identify the texture. Read FAQ entry about ImTextureID for more details.
+ * Common pitfalls:
+ * - If you pass a 'glyph_ranges' array to AddFont*** functions, you need to make sure that your array persist up until the
+ *   atlas is build (when calling GetTexData*** or Build()). We only copy the pointer, not the data.
+ * - Important: By default, AddFontFromMemoryTTF() takes ownership of the data. Even though we are not writing to it, we will free the pointer on destruction.
+ *   You can set font_cfg->FontDataOwnedByAtlas=false to keep ownership of your data and it won't be freed,
+ * - Even though many functions are suffixed with "TTF", OTF data is supported just as well.
+ * - This is an old API and it is currently awkward for those and and various other reasons! We will address them in the future!
+ */
+public final class ImFontAtlas implements ImDestroyable {
+    final long ptr;
+
+    /**
+     * This class will create a native structure.
+     * Call {@link #destroy()} method to manually free used memory.
+     */
+    public ImFontAtlas() {
+        ImGui.touch();
+        ptr = nCreate();
+    }
+
+    ImFontAtlas(final long ptr) {
+        this.ptr = ptr;
+    }
+
+    @Override
+    public void destroy() {
+        nDestroy(ptr);
+    }
+
+    /*JNI
+        #include <imgui.h>
+
+        jfieldID imFontAtlasPtrID;
+
+        #define IM_FONT_ATLAS ((ImFontAtlas*)env->GetLongField(object, imFontAtlasPtrID))
+     */
+
+    static native void nInit(); /*
+        jclass jImFontAtlasClass = env->FindClass("imgui/ImFontAtlas");
+        imFontAtlasPtrID = env->GetFieldID(jImFontAtlasClass, "ptr", "J");
+    */
+
+    private native long nCreate(); /*
+        ImFontAtlas* imFontAtlas = new ImFontAtlas();
+        return (long)imFontAtlas;
+    */
+
+    private native void nDestroy(long ptr); /*
+        delete (ImFontAtlas*)ptr;
+    */
+
+    public ImFont addFont(final ImFontConfig imFontConfig) {
+        return new ImFont(nAddFont(imFontConfig.ptr));
+    }
+
+    private native long nAddFont(long imFontConfigPtr); /*
+        return (long)IM_FONT_ATLAS->AddFont((ImFontConfig*)imFontConfigPtr);
+    */
+
+    public ImFont addFontDefault() {
+        return new ImFont(nAddFontDefault());
+    }
+
+    private native long nAddFontDefault(); /*
+        return (long)IM_FONT_ATLAS->AddFontDefault();
+    */
+
+    public ImFont addFontDefault(final ImFontConfig imFontConfig) {
+        return new ImFont(nAddFontDefault(imFontConfig.ptr));
+    }
+
+    private native long nAddFontDefault(long imFontConfigPtr); /*
+        return (long)IM_FONT_ATLAS->AddFontDefault((ImFontConfig*)imFontConfigPtr);
+    */
+
+    public ImFont addFontFromFileTTF(final String filename, final float sizePixels) {
+        return new ImFont(nAddFontFromFileTTF(filename, sizePixels));
+    }
+
+    private native long nAddFontFromFileTTF(String filename, float sizePixels); /*
+        return (long)IM_FONT_ATLAS->AddFontFromFileTTF(filename, sizePixels);
+    */
+
+    public ImFont addFontFromFileTTF(final String filename, final float sizePixels, final ImFontConfig imFontConfig) {
+        return new ImFont(nAddFontFromFileTTF(filename, sizePixels, imFontConfig.ptr));
+    }
+
+    private native long nAddFontFromFileTTF(String filename, float sizePixels, long imFontConfigPtr); /*
+        return (long)IM_FONT_ATLAS->AddFontFromFileTTF(filename, sizePixels, (ImFontConfig*)imFontConfigPtr);
+    */
+
+    public ImFont addFontFromFileTTF(final String filename, final float sizePixels, final short[] glyphRanges) {
+        return new ImFont(nAddFontFromFileTTF(filename, sizePixels, glyphRanges));
+    }
+
+    private native long nAddFontFromFileTTF(String filename, float sizePixels, short[] glyphRanges); /*
+        return (long)IM_FONT_ATLAS->AddFontFromFileTTF(filename, sizePixels, NULL, (ImWchar*)&glyphRanges[0]);
+    */
+
+    public ImFont addFontFromFileTTF(final String filename, final float sizePixels, final ImFontConfig imFontConfig, final short[] glyphRanges) {
+        return new ImFont(nAddFontFromFileTTF(filename, sizePixels, imFontConfig.ptr, glyphRanges));
+    }
+
+    private native long nAddFontFromFileTTF(String filename, float sizePixels, long imFontConfigPtr, short[] glyphRanges); /*
+        return (long)IM_FONT_ATLAS->AddFontFromFileTTF(filename, sizePixels, (ImFontConfig*)imFontConfigPtr, (ImWchar*)&glyphRanges[0]);
+    */
+
+    /**
+     * Note: Transfer ownership of 'ttf_data' to ImFontAtlas! Will be deleted after destruction of the atlas.
+     * Set font_cfg->FontDataOwnedByAtlas=false to keep ownership of your data and it won't be freed.
+     */
+    public ImFont addFontFromMemoryTTF(final byte[] fontData, final float sizePixels) {
+        return new ImFont(nAddFontFromMemoryTTF(fontData, fontData.length, sizePixels));
+    }
+
+    private native long nAddFontFromMemoryTTF(byte[] fontData, int fontSize, float sizePixels); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryTTF(&fontData[0], fontSize, sizePixels);
+    */
+
+
+    /**
+     * Note: Transfer ownership of 'ttf_data' to ImFontAtlas! Will be deleted after destruction of the atlas.
+     * Set font_cfg->FontDataOwnedByAtlas=false to keep ownership of your data and it won't be freed.
+     */
+    public ImFont addFontFromMemoryTTF(final byte[] fontData, final float sizePixels, final ImFontConfig imFontConfig) {
+        return new ImFont(nAddFontFromMemoryTTF(fontData, fontData.length, sizePixels, imFontConfig.ptr));
+    }
+
+    private native long nAddFontFromMemoryTTF(byte[] fontData, int fontSize, float sizePixels, long imFontConfigPtr); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryTTF(&fontData[0], fontSize, sizePixels, (ImFontConfig*)imFontConfigPtr);
+    */
+
+    /**
+     * Note: Transfer ownership of 'ttf_data' to ImFontAtlas! Will be deleted after destruction of the atlas.
+     * Set font_cfg->FontDataOwnedByAtlas=false to keep ownership of your data and it won't be freed.
+     */
+    public ImFont addFontFromMemoryTTF(final byte[] fontData, final float sizePixels, final short[] glyphRanges) {
+        return new ImFont(nAddFontFromMemoryTTF(fontData, fontData.length, sizePixels, glyphRanges));
+    }
+
+    private native long nAddFontFromMemoryTTF(byte[] fontData, int fontSize, float sizePixels, short[] glyphRanges); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryTTF(&fontData[0], fontSize, sizePixels, NULL, (ImWchar*)&glyphRanges[0]);
+    */
+
+    /**
+     * Note: Transfer ownership of 'ttf_data' to ImFontAtlas! Will be deleted after destruction of the atlas.
+     * Set font_cfg->FontDataOwnedByAtlas=false to keep ownership of your data and it won't be freed.
+     */
+    public ImFont addFontFromMemoryTTF(final byte[] fontData, final float sizePixels, final ImFontConfig imFontConfig, final short[] glyphRanges) {
+        return new ImFont(nAddFontFromMemoryTTF(fontData, fontData.length, sizePixels, imFontConfig.ptr, glyphRanges));
+    }
+
+    private native long nAddFontFromMemoryTTF(byte[] fontData, int fontSize, float sizePixels, long imFontConfigPtr, short[] glyphRanges); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryTTF(&fontData[0], fontSize, sizePixels, (ImFontConfig*)imFontConfigPtr, (ImWchar*)&glyphRanges[0]);
+    */
+
+    /**
+     * 'compressed_font_data' still owned by caller. Compress with binary_to_compressed_c.cpp.
+     */
+    public ImFont addFontFromMemoryCompressedTTF(final byte[] compressedFontData, final float sizePixels) {
+        return new ImFont(nAddFontFromMemoryCompressedTTF(compressedFontData, compressedFontData.length, sizePixels));
+    }
+
+    private native long nAddFontFromMemoryCompressedTTF(byte[] compressedFontData, int fontSize, float sizePixels); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryCompressedTTF(&compressedFontData[0], fontSize, sizePixels);
+    */
+
+    /**
+     * 'compressed_font_data' still owned by caller. Compress with binary_to_compressed_c.cpp.
+     */
+    public ImFont addFontFromMemoryCompressedTTF(final byte[] compressedFontData, final float sizePixels, final ImFontConfig imFontConfig) {
+        return new ImFont(nAddFontFromMemoryCompressedTTF(compressedFontData, compressedFontData.length, sizePixels, imFontConfig.ptr));
+    }
+
+    private native long nAddFontFromMemoryCompressedTTF(byte[] compressedFontData, int fontSize, float sizePixels, long imFontConfigPtr); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryCompressedTTF(&compressedFontData[0], fontSize, sizePixels, (ImFontConfig*)imFontConfigPtr);
+    */
+
+    /**
+     * 'compressed_font_data' still owned by caller. Compress with binary_to_compressed_c.cpp.
+     */
+    public ImFont addFontFromMemoryCompressedTTF(final byte[] compressedFontData, final float sizePixels, final short[] glyphRanges) {
+        return new ImFont(nAddFontFromMemoryCompressedTTF(compressedFontData, compressedFontData.length, sizePixels, glyphRanges));
+    }
+
+    private native long nAddFontFromMemoryCompressedTTF(byte[] compressedFontData, int fontSize, float sizePixels, short[] glyphRanges); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryCompressedTTF(&compressedFontData[0], fontSize, sizePixels, NULL, (ImWchar*)&glyphRanges[0]);
+    */
+
+    /**
+     * 'compressed_font_data' still owned by caller. Compress with binary_to_compressed_c.cpp.
+     */
+    public ImFont addFontFromMemoryCompressedTTF(final byte[] compressedFontData, final float sizePixels, final ImFontConfig imFontConfig, final short[] glyphRanges) {
+        return new ImFont(nAddFontFromMemoryCompressedTTF(compressedFontData, compressedFontData.length, sizePixels, imFontConfig.ptr, glyphRanges));
+    }
+
+    private native long nAddFontFromMemoryCompressedTTF(byte[] compressedFontData, int fontSize, float sizePixels, long imFontConfigPtr, short[] glyphRanges); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryCompressedTTF(&compressedFontData[0], fontSize, sizePixels, (ImFontConfig*)imFontConfigPtr, (ImWchar*)&glyphRanges[0]);
+    */
+
+    /**
+     * 'compressed_font_data_base85' still owned by caller. Compress with binary_to_compressed_c.cpp with -base85 parameter.
+     */
+    public ImFont addFontFromMemoryCompressedBase85TTF(final String compressedFontDataBase85, final float sizePixels) {
+        return new ImFont(nAddFontFromMemoryCompressedBase85TTF(compressedFontDataBase85, sizePixels));
+    }
+
+    private native long nAddFontFromMemoryCompressedBase85TTF(String compressedFontDataBase85, float sizePixels); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryCompressedBase85TTF(compressedFontDataBase85, sizePixels);
+    */
+
+    /**
+     * 'compressed_font_data' still owned by caller. Compress with binary_to_compressed_c.cpp.
+     */
+    public ImFont addFontFromMemoryCompressedBase85TTF(final String compressedFontDataBase85, final float sizePixels, final ImFontConfig imFontConfig) {
+        return new ImFont(nAddFontFromMemoryCompressedBase85TTF(compressedFontDataBase85, sizePixels, imFontConfig.ptr));
+    }
+
+    private native long nAddFontFromMemoryCompressedBase85TTF(String compressedFontDataBase85, float sizePixels, long imFontConfigPtr); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryCompressedBase85TTF(compressedFontDataBase85, sizePixels, (ImFontConfig*)imFontConfigPtr);
+    */
+
+    /**
+     * 'compressed_font_data_base85' still owned by caller. Compress with binary_to_compressed_c.cpp with -base85 parameter.
+     */
+    public ImFont addFontFromMemoryCompressedBase85TTF(final String compressedFontDataBase85, final float sizePixels, final short[] glyphRanges) {
+        return new ImFont(nAddFontFromMemoryCompressedBase85TTF(compressedFontDataBase85, sizePixels, glyphRanges));
+    }
+
+    private native long nAddFontFromMemoryCompressedBase85TTF(String compressedFontDataBase85, float sizePixels, short[] glyphRanges); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryCompressedBase85TTF(compressedFontDataBase85, sizePixels, NULL, (ImWchar*)&glyphRanges[0]);
+    */
+
+    /**
+     * 'compressed_font_data_base85' still owned by caller. Compress with binary_to_compressed_c.cpp with -base85 parameter.
+     */
+    public ImFont addFontFromMemoryCompressedBase85TTF(final String compressedFontDataBase85, final float sizePixels, final ImFontConfig imFontConfig, final short[] glyphRanges) {
+        return new ImFont(nAddFontFromMemoryCompressedBase85TTF(compressedFontDataBase85, sizePixels, imFontConfig.ptr, glyphRanges));
+    }
+
+    private native long nAddFontFromMemoryCompressedBase85TTF(String compressedFontDataBase85, float sizePixels, long imFontConfigPtr, short[] glyphRanges); /*
+        return (long)IM_FONT_ATLAS->AddFontFromMemoryCompressedBase85TTF(compressedFontDataBase85, sizePixels, (ImFontConfig*)imFontConfigPtr, (ImWchar*)&glyphRanges[0]);
+    */
+
+    /**
+     * Clear input data (all ImFontConfig structures including sizes, TTF data, glyph ranges, etc.) = all the data used to build the texture and fonts.
+     */
+    public native void clearInputData(); /*
+        IM_FONT_ATLAS->ClearInputData();
+    */
+
+    /**
+     * Clear output texture data (CPU side). Saves RAM once the texture has been copied to graphics memory.
+     */
+    public native void clearTexData(); /*
+        IM_FONT_ATLAS->ClearTexData();
+    */
+
+    /**
+     * Clear output font data (glyphs storage, UV coordinates).
+     */
+    public native void clearFonts(); /*
+        IM_FONT_ATLAS->ClearFonts();
+    */
+
+    /**
+     * Clear all input and output.
+     */
+    public native void clear(); /*
+        IM_FONT_ATLAS->Clear();
+    */
+
+    // Build atlas, retrieve pixel data.
+    // User is in charge of copying the pixels into graphics memory (e.g. create a texture with your engine). Then store your texture handle with SetTexID().
+    // The pitch is always = Width * BytesPerPixels (1 or 4)
+    // Building in RGBA32 format is provided for convenience and compatibility, but note that unless you manually manipulate or copy color data into
+    // the texture (e.g. when using the AddCustomRect*** api), then the RGB pixels emitted will always be white (~75% of memory/bandwidth waste.
+
+    /**
+     * Build pixels data. This is called automatically for you by the GetTexData*** functions.
+     */
+    public native boolean build(); /*
+        return IM_FONT_ATLAS->Build();
+    */
+
+    /**
+     * 1 byte-per-pixel
+     */
+    public ByteBuffer getTexDataAsAlpha8(final ImInt outWidth, final ImInt outHeight) {
+        return getTexDataAsAlpha8(outWidth, outHeight, new ImInt());
+    }
+
+    /**
+     * 1 byte-per-pixel
+     */
+    public ByteBuffer getTexDataAsAlpha8(final ImInt outWidth, final ImInt outHeight, final ImInt outBytesPerPixel) {
+        final byte[] tmpBuff = getTexDataAsAlpha8(outWidth.data, outHeight.data, outBytesPerPixel.data);
+        final ByteBuffer buffer = ByteBuffer.allocateDirect(tmpBuff.length).order(ByteOrder.nativeOrder());
+        buffer.put(tmpBuff);
+        buffer.flip();
+        return buffer;
+    }
+
+    private native byte[] getTexDataAsAlpha8(int[] outWidth, int[] outHeight, int[] outBytesPerPixel); /*
+        unsigned char* pixels;
+        IM_FONT_ATLAS->GetTexDataAsAlpha8(&pixels, &outWidth[0], &outHeight[0], &outBytesPerPixel[0]);
+        int size = outWidth[0] * outHeight[0] * outBytesPerPixel[0];
+        jbyteArray jBytes = env->NewByteArray(size);
+        env->SetByteArrayRegion(jBytes, 0, size, (jbyte*)pixels);
+        return jBytes;
+    */
+
+    /**
+     * 4 bytes-per-pixel
+     */
+    public ByteBuffer getTexDataAsRGBA32(final ImInt outWidth, final ImInt outHeight) {
+        return getTexDataAsRGBA32(outWidth, outHeight, new ImInt());
+    }
+
+    /**
+     * 4 bytes-per-pixel
+     */
+    public ByteBuffer getTexDataAsRGBA32(final ImInt outWidth, final ImInt outHeight, final ImInt outBytesPerPixel) {
+        final byte[] tmpBuff = nGetTexDataAsRGBA32(outWidth.data, outHeight.data, outBytesPerPixel.data);
+        final ByteBuffer buffer = ByteBuffer.allocateDirect(tmpBuff.length).order(ByteOrder.nativeOrder());
+        buffer.put(tmpBuff);
+        buffer.flip();
+        return buffer;
+    }
+
+    private native byte[] nGetTexDataAsRGBA32(int[] outWidth, int[] outHeight, int[] outBytesPerPixel); /*
+        unsigned char* pixels;
+        IM_FONT_ATLAS->GetTexDataAsRGBA32(&pixels, &outWidth[0], &outHeight[0], &outBytesPerPixel[0]);
+        int size = outWidth[0] * outHeight[0] * outBytesPerPixel[0];
+        jbyteArray jBytes = env->NewByteArray(size);
+        env->SetByteArrayRegion(jBytes, 0, size, (jbyte*)pixels);
+        return jBytes;
+    */
+
+    public native boolean isBuilt(); /*
+        return IM_FONT_ATLAS->IsBuilt();
+    */
+
+    public native void setTexID(int imTextureId); /*
+        IM_FONT_ATLAS->SetTexID((ImTextureID)imTextureId);
+    */
+
+    //-------------------------------------------
+    // Glyph Ranges
+    //-------------------------------------------
+
+    // Helpers to retrieve list of common Unicode ranges (2 value per range, values are inclusive, zero-terminated list)
+    // NB: Make sure that your string are UTF-8 and NOT in your local code page. In C++11, you can create UTF-8 string literal using the u8"Hello world" syntax. See FAQ for details.
+    // NB: Consider using ImFontGlyphRangesBuilder to build glyph ranges from textual data.
+
+    /*JNI
+        #define RETURN_GLYPH_2_SHORT(glyphs) \
+            int size = sizeof(glyphs); \
+            jshortArray jShorts = env->NewShortArray(size); \
+            env->SetShortArrayRegion(jShorts, 0, size, (jshort*)glyphs); \
+            return jShorts;
+     */
+
+    /**
+     * Basic Latin, Extended Latin
+     */
+    public native short[] getGlyphRangesDefault(); /*
+        RETURN_GLYPH_2_SHORT(IM_FONT_ATLAS->GetGlyphRangesDefault());
+    */
+
+    /**
+     * Default + Korean characters
+     */
+    public native short[] getGlyphRangesKorean(); /*
+        RETURN_GLYPH_2_SHORT(IM_FONT_ATLAS->GetGlyphRangesKorean());
+    */
+
+    /**
+     * Default + Hiragana, Katakana, Half-Width, Selection of 1946 Ideographs
+     */
+    public native short[] getGlyphRangesJapanese(); /*
+        RETURN_GLYPH_2_SHORT(IM_FONT_ATLAS->GetGlyphRangesJapanese());
+    */
+
+    /**
+     * Default + Half-Width + Japanese Hiragana/Katakana + full set of about 21000 CJK Unified Ideographs
+     */
+    public native short[] getGlyphRangesChineseFull(); /*
+        RETURN_GLYPH_2_SHORT(IM_FONT_ATLAS->GetGlyphRangesChineseFull());
+    */
+
+    /**
+     * Default + Half-Width + Japanese Hiragana/Katakana + set of 2500 CJK Unified Ideographs for common simplified Chinese
+     */
+    public native short[] getGlyphRangesChineseSimplifiedCommon(); /*
+        RETURN_GLYPH_2_SHORT(IM_FONT_ATLAS->GetGlyphRangesChineseSimplifiedCommon());
+    */
+
+    /**
+     * Default + about 400 Cyrillic characters
+     */
+    public native short[] getGlyphRangesCyrillic(); /*
+        RETURN_GLYPH_2_SHORT(IM_FONT_ATLAS->GetGlyphRangesCyrillic());
+    */
+
+    /**
+     * Default + Thai characters
+     */
+    public native short[] getGlyphRangesThai(); /*
+        RETURN_GLYPH_2_SHORT(IM_FONT_ATLAS->GetGlyphRangesThai());
+    */
+
+    /**
+     * Default + Vietnamese characters
+     */
+    public native short[] getGlyphRangesVietnamese(); /*
+        RETURN_GLYPH_2_SHORT(IM_FONT_ATLAS->GetGlyphRangesVietnamese());
+    */
+
+    //-------------------------------------------
+    // [BETA] Custom Rectangles/Glyphs API
+    //-------------------------------------------
+
+    // You can request arbitrary rectangles to be packed into the atlas, for your own purposes.
+    // After calling Build(), you can query the rectangle position and render your pixels.
+    // You can also request your rectangles to be mapped as font glyph (given a font + Unicode point),
+    // so you can render e.g. custom colorful icons and use them as regular glyphs.
+    // Read docs/FONTS.txt for more details about using colorful icons.
+
+    /**
+     * Id needs to be >= 0x110000. Id >= 0x80000000 are reserved for ImGui and ImDrawList
+     */
+    public native int addCustomRectRegular(int id, int width, int height); /*
+        return IM_FONT_ATLAS->AddCustomRectRegular((unsigned int)id, width, height);
+    */
+
+    /**
+     * Id needs to be < 0x110000 to register a rectangle to map into a specific font.
+     */
+    public int addCustomRectFontGlyph(final ImFont imFont, final short id, final int width, final int height, final float advanceX) {
+        return nAddCustomRectFontGlyph(imFont.ptr, id, width, height, advanceX);
+    }
+
+    private native int nAddCustomRectFontGlyph(long imFontPtr, short id, int width, int height, float advanceX); /*
+        return IM_FONT_ATLAS->AddCustomRectFontGlyph((ImFont*)imFontPtr, id, width, height, advanceX);
+    */
+
+    /**
+     * Id needs to be < 0x110000 to register a rectangle to map into a specific font.
+     */
+    public int addCustomRectFontGlyph(final ImFont imFont, final short id, final int width, final int height, final float advanceX, final float offsetX, final float offsetY) {
+        return nAddCustomRectFontGlyph(imFont.ptr, id, width, height, advanceX, offsetX, offsetY);
+    }
+
+    private native int nAddCustomRectFontGlyph(long imFontPtr, short id, int width, int height, float advanceX, float offsetX, float offsetY); /*
+        return IM_FONT_ATLAS->AddCustomRectFontGlyph((ImFont*)imFontPtr, id, width, height, advanceX, ImVec2(offsetX, offsetY));
+    */
+
+    // TODO GetCustomRectByIndex
+
+    //-------------------------------------------
+    // Members
+    //-------------------------------------------
+
+    /**
+     * Marked as Locked by ImGui::NewFrame() so attempt to modify the atlas will assert.
+     */
+    public native boolean getLocked(); /*
+        return IM_FONT_ATLAS->Locked;
+    */
+
+    /**
+     * Marked as Locked by ImGui::NewFrame() so attempt to modify the atlas will assert.
+     */
+    public native void setLocked(boolean locked); /*
+        IM_FONT_ATLAS->Locked = locked;
+    */
+
+    /**
+     * Build flags (see ImFontAtlasFlags_)
+     */
+    public native int getFlags(); /*
+        return IM_FONT_ATLAS->Flags;
+    */
+
+    /**
+     * Build flags (see ImFontAtlasFlags_)
+     */
+    public native void setFlags(int imFontAtlasFlags); /*
+        IM_FONT_ATLAS->Flags = imFontAtlasFlags;
+    */
+
+    /**
+     * User data to refer to the texture once it has been uploaded to user's graphic systems.
+     * It is passed back to you during rendering via the ImDrawCmd structure.
+     */
+    public native int getTexID(); /*
+        return (int)(long)(void*)IM_FONT_ATLAS->TexID;
+    */
+
+    /**
+     * Texture width desired by user before Build(). Must be a power-of-two.
+     * If have many glyphs your graphics API have texture size restrictions you may want to increase texture width to decrease height.
+     */
+    public native int getTexDesiredWidth(); /*
+        return IM_FONT_ATLAS->TexDesiredWidth;
+    */
+
+    /**
+     * Texture width desired by user before Build(). Must be a power-of-two.
+     * If have many glyphs your graphics API have texture size restrictions you may want to increase texture width to decrease height.
+     */
+    public native void setTexDesiredWidth(int texDesiredWidth); /*
+        IM_FONT_ATLAS->TexDesiredWidth = texDesiredWidth;
+    */
+
+    /**
+     * Padding between glyphs within texture in pixels. Defaults to 1.
+     * If your rendering method doesn't rely on bilinear filtering you may set this to 0.
+     */
+    public native int getTexGlyphPadding(); /*
+        return IM_FONT_ATLAS->TexGlyphPadding;
+    */
+
+    /**
+     * Padding between glyphs within texture in pixels. Defaults to 1.
+     * If your rendering method doesn't rely on bilinear filtering you may set this to 0.
+     */
+    public native void setTexGlyphPadding(int texGlyphPadding); /*
+        IM_FONT_ATLAS->TexGlyphPadding = texGlyphPadding;
+    */
+}

imgui-binding/src/main/java/imgui/ImFontConfig.java

@@ -0,0 +1,321 @@
+package imgui;
+
+public final class ImFontConfig implements ImDestroyable {
+    final long ptr;
+
+    private short[] glyphRanges;
+
+    /**
+     * This class will create a native structure.
+     * Call {@link #destroy()} method to manually free used memory.
+     */
+    public ImFontConfig() {
+        ImGui.touch();
+        ptr = nCreate();
+        setFontDataOwnedByAtlas(false); // Read method javadoc
+    }
+
+    ImFontConfig(final long ptr) {
+        this.ptr = ptr;
+        setFontDataOwnedByAtlas(false); // Read method javadoc
+    }
+
+    @Override
+    public void destroy() {
+        nDestroy(ptr);
+    }
+
+    /*JNI
+        #include <imgui.h>
+        #include "jni_common.h"
+
+        jfieldID imFontConfigPtrID;
+
+        #define IM_FONT_CONFIG ((ImFontConfig*)env->GetLongField(object, imFontConfigPtrID))
+     */
+
+    static native void nInit(); /*
+        jclass jImFontConfigClass = env->FindClass("imgui/ImFontConfig");
+        imFontConfigPtrID = env->GetFieldID(jImFontConfigClass, "ptr", "J");
+    */
+
+    private native long nCreate(); /*
+        ImFontConfig* imFontConfig = new ImFontConfig();
+        return (long)imFontConfig;
+    */
+
+    private native void nDestroy(long ptr); /*
+        delete (ImFontConfig*)ptr;
+    */
+
+    /**
+     * TTF/OTF data
+     */
+    public native byte[] getFontData(); /*
+        int size = IM_FONT_CONFIG->FontDataSize;
+        jbyteArray jBytes = env->NewByteArray(size);
+        env->SetByteArrayRegion(jBytes, 0, size, (jbyte*)IM_FONT_CONFIG->FontData);
+        return jBytes;
+    */
+
+    /**
+     * TTF/OTF data
+     */
+    public native void setFontData(byte[] fontData); /*
+        IM_FONT_CONFIG->FontData = &fontData[0];
+    */
+
+    /**
+     * TTF/OTF data size
+     */
+    public native int getFontDataSize(); /*
+        return IM_FONT_CONFIG->FontDataSize;
+    */
+
+    /**
+     * TTF/OTF data size
+     */
+    public native void setFontDataSize(int fontDataSize); /*
+        IM_FONT_CONFIG->FontDataSize = fontDataSize;
+    */
+
+    /**
+     * TTF/OTF data ownership taken by the container ImFontAtlas (will delete memory itself).
+     */
+    public native boolean getFontDataOwnedByAtlas(); /*
+        return IM_FONT_CONFIG->FontDataOwnedByAtlas;
+    */
+
+    /**
+     * TTF/OTF data ownership taken by the container ImFontAtlas (will delete memory itself).
+     * <p>
+     * BINDING NOTICE: By default binding will set this value to <b>false</b>.
+     * If this is not done, Dear ImGui will try to free memory allocated by JVM to store fonts data while running {@link ImGui#destroyContext()}.
+     * This will result into a native exception, since JVM by itself controls it's own resources.
+     */
+    public native void setFontDataOwnedByAtlas(boolean isFontDataOwnedByAtlas); /*
+        IM_FONT_CONFIG->FontDataOwnedByAtlas = isFontDataOwnedByAtlas;
+    */
+
+    /**
+     * Index of font within TTF/OTF file
+     */
+    public native int getFontNo(); /*
+        return IM_FONT_CONFIG->FontNo;
+    */
+
+    /**
+     * Index of font within TTF/OTF file
+     */
+    public native void setFontNo(int fontNo); /*
+        IM_FONT_CONFIG->FontNo = fontNo;
+    */
+
+    /**
+     * Size in pixels for rasterizer (more or less maps to the resulting font height).
+     */
+    public native float getSizePixels(); /*
+        return IM_FONT_CONFIG->SizePixels;
+    */
+
+    /**
+     * Size in pixels for rasterizer (more or less maps to the resulting font height).
+     */
+    public native void setSizePixels(float sizePixels); /*
+        IM_FONT_CONFIG->SizePixels = sizePixels;
+    */
+
+    /**
+     * Rasterize at higher quality for sub-pixel positioning.
+     * Read https://github.com/nothings/stb/blob/master/tests/oversample/README.md for details.
+     */
+    public native int getOversampleH(); /*
+        return IM_FONT_CONFIG->OversampleH;
+    */
+
+    /**
+     * Rasterize at higher quality for sub-pixel positioning.
+     * Read https://github.com/nothings/stb/blob/master/tests/oversample/README.md for details.
+     */
+    public native void setOversampleH(int oversampleH); /*
+        IM_FONT_CONFIG->OversampleH = oversampleH;
+    */
+
+    /**
+     * Rasterize at higher quality for sub-pixel positioning.
+     * We don't use sub-pixel positions on the Y axis.
+     */
+    public native int getOversampleV(); /*
+        return IM_FONT_CONFIG->OversampleV;
+    */
+
+    /**
+     * Rasterize at higher quality for sub-pixel positioning.
+     * We don't use sub-pixel positions on the Y axis.
+     */
+    public native void setOversampleV(int oversampleV); /*
+        IM_FONT_CONFIG->OversampleV = oversampleV;
+    */
+
+    /**
+     * Align every glyph to pixel boundary. Useful e.g. if you are merging a non-pixel aligned font with the default font.
+     * If enabled, you can set OversampleH/V to 1.
+     */
+    public native boolean getPixelSnapH(); /*
+        return IM_FONT_CONFIG->PixelSnapH;
+    */
+
+    /**
+     * Align every glyph to pixel boundary. Useful e.g. if you are merging a non-pixel aligned font with the default font.
+     * If enabled, you can set OversampleH/V to 1.
+     */
+    public native void setPixelSnapH(boolean isPixelSnapH); /*
+        IM_FONT_CONFIG->PixelSnapH = isPixelSnapH;
+    */
+
+    /**
+     * Extra spacing (in pixels) between glyphs. Only X axis is supported for now.
+     */
+    public native void getGlyphExtraSpacing(ImVec2 dstImVec2); /*
+        Jni::ImVec2Cpy(env, &IM_FONT_CONFIG->GlyphExtraSpacing, dstImVec2);
+    */
+
+    /**
+     * Extra spacing (in pixels) between glyphs. Only X axis is supported for now.
+     */
+    public native void setGlyphExtraSpacing(float x, float y); /*
+        IM_FONT_CONFIG->GlyphExtraSpacing.x = x;
+        IM_FONT_CONFIG->GlyphExtraSpacing.y = y;
+    */
+
+    /**
+     * Offset all glyphs from this font input.
+     */
+    public native void getGlyphOffset(ImVec2 dstImVec2); /*
+        Jni::ImVec2Cpy(env, &IM_FONT_CONFIG->GlyphOffset, dstImVec2);
+    */
+
+    /**
+     * Offset all glyphs from this font input.
+     */
+    public native void setGlyphOffset(float x, float y); /*
+        IM_FONT_CONFIG->GlyphOffset.x = x;
+        IM_FONT_CONFIG->GlyphOffset.y = y;
+    */
+
+    /**
+     * Pointer to a user-provided list of Unicode range (2 value per range, values are inclusive, zero-terminated list).
+     * THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE.
+     */
+    public short[] getGlyphRanges() {
+        return glyphRanges;
+    }
+
+    /**
+     * Pointer to a user-provided list of Unicode range (2 value per range, values are inclusive, zero-terminated list).
+     * THE ARRAY DATA NEEDS TO PERSIST AS LONG AS THE FONT IS ALIVE.
+     */
+    public void setGlyphRanges(final short[] glyphRanges) {
+        this.glyphRanges = glyphRanges;
+        nSetGlyphRanges(glyphRanges);
+    }
+
+    private native void nSetGlyphRanges(short[] glyphRanges); /*
+        IM_FONT_CONFIG->GlyphRanges = glyphRanges != NULL ? (ImWchar*)&glyphRanges[0] : NULL;
+    */
+
+    /**
+     * Minimum AdvanceX for glyphs, set Min to align font icons, set both Min/Max to enforce mono-space font
+     */
+    public native float getGlyphMinAdvanceX(); /*
+        return IM_FONT_CONFIG->GlyphMinAdvanceX;
+    */
+
+    /**
+     * Minimum AdvanceX for glyphs, set Min to align font icons, set both Min/Max to enforce mono-space font
+     */
+    public native void setGlyphMinAdvanceX(float glyphMinAdvanceX); /*
+        IM_FONT_CONFIG->GlyphMinAdvanceX = glyphMinAdvanceX;
+    */
+
+    /**
+     * Maximum AdvanceX for glyphs
+     */
+    public native float getGlyphMaxAdvanceX(); /*
+        return IM_FONT_CONFIG->GlyphMaxAdvanceX;
+    */
+
+    /**
+     * Maximum AdvanceX for glyphs
+     */
+    public native void setGlyphMaxAdvanceX(float glyphMaxAdvanceX); /*
+        IM_FONT_CONFIG->GlyphMaxAdvanceX = glyphMaxAdvanceX;
+    */
+
+    /**
+     * Merge into previous ImFont, so you can combine multiple inputs font into one ImFont (e.g. ASCII font + icons + Japanese glyphs).
+     * You may want to use GlyphOffset.y when merge font of different heights.
+     */
+    public native boolean getMergeMode(); /*
+        return IM_FONT_CONFIG->MergeMode;
+    */
+
+    /**
+     * Merge into previous ImFont, so you can combine multiple inputs font into one ImFont (e.g. ASCII font + icons + Japanese glyphs).
+     * You may want to use GlyphOffset.y when merge font of different heights.
+     */
+    public native void setMergeMode(boolean mergeMode); /*
+        IM_FONT_CONFIG->MergeMode = mergeMode;
+    */
+
+    /**
+     * Settings for custom font rasterizer (e.g. ImGuiFreeType). Leave as zero if you aren't using one.
+     */
+    public native int getRasterizerFlags(); /*
+        return IM_FONT_CONFIG->RasterizerFlags;
+    */
+
+    /**
+     * Settings for custom font rasterizer (e.g. ImGuiFreeType). Leave as zero if you aren't using one.
+     */
+    public native void setRasterizerFlags(int rasterizerFlags); /*
+        IM_FONT_CONFIG->RasterizerFlags = (unsigned int)rasterizerFlags;
+    */
+
+    /**
+     * Brighten (>1.0f) or darken (<1.0f) font output. Brightening small fonts may be a good workaround to make them more readable.
+     */
+    public native float getRasterizerMultiply(); /*
+        return IM_FONT_CONFIG->RasterizerMultiply;
+    */
+
+    /**
+     * Brighten (>1.0f) or darken (<1.0f) font output. Brightening small fonts may be a good workaround to make them more readable.
+     */
+    public native void setRasterizerMultiply(float rasterizerMultiply); /*
+        IM_FONT_CONFIG->RasterizerMultiply = rasterizerMultiply;
+    */
+
+    /**
+     * Explicitly specify unicode codepoint of ellipsis character. When fonts are being merged first specified ellipsis will be used.
+     */
+    public native short getEllipsisChar(); /*
+        return (short)IM_FONT_CONFIG->EllipsisChar;
+    */
+
+    /**
+     * Explicitly specify unicode codepoint of ellipsis character. When fonts are being merged first specified ellipsis will be used.
+     */
+    public native void setEllipsisChar(short ellipsisChar); /*
+        IM_FONT_CONFIG->EllipsisChar = (ImWchar)ellipsisChar;
+    */
+
+    // [Internal]
+
+    /**
+     * Name (strictly to ease debugging)
+     */
+    public native void setName(String name); /*
+        strcpy(IM_FONT_CONFIG->Name, name);
+    */
+}

imgui-binding/src/main/java/imgui/ImFontGlyph.java

@@ -0,0 +1,186 @@
+package imgui;
+
+public final class ImFontGlyph implements ImDestroyable {
+    final long ptr;
+
+    /**
+     * This class will create a native structure.
+     * Call {@link #destroy()} method to manually free used memory.
+     */
+    public ImFontGlyph() {
+        ImGui.touch();
+        ptr = nCreate();
+    }
+
+    ImFontGlyph(final long ptr) {
+        this.ptr = ptr;
+    }
+
+    @Override
+    public void destroy() {
+        nDestroy(ptr);
+    }
+
+    /*JNI
+        #include <imgui.h>
+        #include "jni_common.h"
+
+        jfieldID imFontGlyphPtrID;
+
+        #define IM_FONT_GLYPH ((ImFontGlyph*)env->GetLongField(object, imFontGlyphPtrID))
+     */
+
+    static native void nInit(); /*
+        jclass jImFontGlyphClass = env->FindClass("imgui/ImFontGlyph");
+        imFontGlyphPtrID = env->GetFieldID(jImFontGlyphClass, "ptr", "J");
+    */
+
+    private native long nCreate(); /*
+        ImFontConfig* imFontConfig = new ImFontConfig();
+        return (long)imFontConfig;
+    */
+
+    private native void nDestroy(long ptr); /*
+        delete (ImFontConfig*)ptr;
+    */
+
+    /**
+     * 0x0000..0xFFFF
+     */
+    public native short getCodepoint(); /*
+        return (short)IM_FONT_GLYPH->Codepoint;
+    */
+
+    /**
+     * 0x0000..0xFFFF
+     */
+    public native void setCodepoint(short codepoint); /*
+        IM_FONT_GLYPH->Codepoint = (ImWchar)codepoint;
+    */
+
+    /**
+     * Distance to next character (= data from font + ImFontConfig::GlyphExtraSpacing.x baked in)
+     */
+    public native float getAdvanceX(); /*
+        return IM_FONT_GLYPH->AdvanceX;
+    */
+
+    /**
+     * Distance to next character (= data from font + ImFontConfig::GlyphExtraSpacing.x baked in)
+     */
+    public native void setAdvanceX(float advanceX); /*
+        IM_FONT_GLYPH->AdvanceX = advanceX;
+    */
+
+    /**
+     * Glyph corners
+     */
+    public native float getX0(); /*
+        return IM_FONT_GLYPH->X0;
+    */
+
+    /**
+     * Glyph corners
+     */
+    public native void setX0(float x0); /*
+        IM_FONT_GLYPH->X0 = x0;
+    */
+
+    /**
+     * Glyph corners
+     */
+    public native float getY0(); /*
+        return IM_FONT_GLYPH->Y0;
+    */
+
+    /**
+     * Glyph corners
+     */
+    public native void setY0(float y0); /*
+        IM_FONT_GLYPH->Y0 = y0;
+    */
+
+    /**
+     * Glyph corners
+     */
+    public native float getX1(); /*
+        return IM_FONT_GLYPH->X1;
+    */
+
+    /**
+     * Glyph corners
+     */
+    public native void setX1(float x1); /*
+        IM_FONT_GLYPH->X1 = x1;
+    */
+
+    /**
+     * Glyph corners
+     */
+    public native float getY1(); /*
+        return IM_FONT_GLYPH->Y1;
+    */
+
+    /**
+     * Glyph corners
+     */
+    public native void setY1(float y1); /*
+        IM_FONT_GLYPH->Y1 = y1;
+    */
+
+    /**
+     * Texture coordinates
+     */
+    public native float getU0(); /*
+        return IM_FONT_GLYPH->U0;
+    */
+
+    /**
+     * Texture coordinates
+     */
+    public native void setU0(float u0); /*
+        IM_FONT_GLYPH->U0 = u0;
+    */
+
+    /**
+     * Texture coordinates
+     */
+    public native float getV0(); /*
+        return IM_FONT_GLYPH->V0;
+    */
+
+    /**
+     * Texture coordinates
+     */
+    public native void setV0(float v0); /*
+        IM_FONT_GLYPH->V0 = v0;
+    */
+
+    /**
+     * Texture coordinates
+     */
+    public native float getU1(); /*
+        return IM_FONT_GLYPH->U1;
+    */
+
+    /**
+     * Texture coordinates
+     */
+    public native void setU1(float u1); /*
+        IM_FONT_GLYPH->U1 = u1;
+    */
+
+    /**
+     * Texture coordinates
+     */
+    public native float getV1(); /*
+        return IM_FONT_GLYPH->V1;
+    */
+
+    /**
+     * Texture coordinates
+     */
+    public native void setV1(float v1); /*
+        IM_FONT_GLYPH->V1 = v1;
+    */
+}

imgui-binding/src/main/java/imgui/ImGui.java

@@ -17,14 +17,16 @@ public final class ImGui {
     private static final String LIB_NAME_DEFAULT = System.getProperty("os.arch").contains("64") ? "imgui-java64" : "imgui-java";
     private static final String LIB_TMP_DIR_PREFIX = "imgui-java-bin_" + System.getProperty("user.name", "user");
 
-    private static final ImDrawData DRAW_DATA = new ImDrawData(100_000, 100_000, 1000);
-    private static final ImGuiIO IMGUI_IO = new ImGuiIO();
-    private static final ImGuiStyle IMGUI_STYLE = new ImGuiStyle();
+    private static final ImDrawData DRAW_DATA;
+    private static final ImGuiIO IMGUI_IO;
+    private static final ImGuiStyle IMGUI_STYLE;
 
     private static final ImDrawList IM_DRAW_LIST_WINDOW = new ImDrawList(ImDrawList.TYPE_WINDOW);
     private static final ImDrawList IM_DRAW_LIST_BACKGROUND = new ImDrawList(ImDrawList.TYPE_BACKGROUND);
     private static final ImDrawList IM_DRAW_LIST_FOREGROUND = new ImDrawList(ImDrawList.TYPE_FOREGROUND);
 
+    private static ImFont font;
+
     static {
         final String libPath = System.getProperty(LIB_PATH_PROP);
         final String libName = System.getProperty(LIB_NAME_PROP, LIB_NAME_DEFAULT);
@@ -40,9 +42,17 @@ public final class ImGui {
             System.loadLibrary(libName);
         }
 
+        DRAW_DATA = new ImDrawData(100_000, 100_000, 1000);
+        IMGUI_IO = new ImGuiIO();
+        IMGUI_STYLE = new ImGuiStyle();
+
         nInitJni();
         ImDrawList.nInit();
         ImDrawData.nInit();
+        ImFontAtlas.nInit();
+        ImFontConfig.nInit();
+        ImFontGlyph.nInit();
+        ImFont.nInit();
         nInitInputTextData();
     }
 
@@ -81,6 +91,14 @@ public final class ImGui {
         }
     }
 
+    /**
+     * For internal usage.
+     * Method is used to initiate static instantiation (loading of the native libraries etc.).
+     * Otherwise native libraries will be loaded on demand and natively mapped objects won't work.
+     */
+    static void touch() {
+    }
+
     private ImGui() {
     }
 
@@ -107,7 +125,13 @@ public final class ImGui {
         ImGui::CreateContext();
     */
 
-    // public static void CreateContext(ImFontAtlas sharedFontAtlas) TODO create context with fonts
+    public static void createContext(ImFontAtlas sharedFontAtlas) {
+        nCreateContext(sharedFontAtlas.ptr);
+    }
+
+    private static native void nCreateContext(long sharedFontAtlasPtr); /*
+        ImGui::CreateContext((ImFontAtlas*)sharedFontAtlasPtr);
+    */
 
     public static native void destroyContext(); /*
         ImGui::DestroyContext();
@@ -769,7 +793,13 @@ public final class ImGui {
 
     // Parameters stacks (shared)
 
-    // TODO void PushFont(ImFont* font);
+    public static void pushFont(ImFont font) {
+        nPushFont(font.ptr);
+    }
+
+    private static native void nPushFont(long fontPtr); /*
+        ImGui::PushFont((ImFont*)fontPtr);
+    */
 
     public static native void popFont(); /*
         ImGui::PopFont();
@@ -815,7 +845,19 @@ public final class ImGui {
         Jni::ImVec4Cpy(env, ImGui::GetStyleColorVec4(imGuiStyleVar), dstImVec4);
     */
 
-    // TODO ImFont* GetFont();
+    /**
+     * Get current font.
+     */
+    public static ImFont getFont() {
+        if (font == null) {
+            font = new ImFont(nGetFont());
+        }
+        return font;
+    }
+
+    private static native long nGetFont(); /*
+        return (long)ImGui::GetFont();
+    */
 
     /**
      * Get current font size (= height in pixels) of current font with current scale applied
@@ -854,6 +896,7 @@ public final class ImGui {
 
     /**
      * Retrieve given color with style alpha applied
+     * <p>
      * BINDING NOTICE: Since {@link #getColorU32(int)} has the same signature, this specific method has an 'i' suffix.
      */
     public static native int getColorU32i(int col); /*
@@ -1196,6 +1239,7 @@ public final class ImGui {
 
     /**
      * Formatted text
+     * <p>
      * BINDING NOTICE: Since all text formatting could be done on Java side, this call is equal to {@link ImGui#textUnformatted(String)}.
      */
     public static native void text(String text); /*
@@ -3349,7 +3393,6 @@ public final class ImGui {
     */
 
     // Widgets: List Boxes
-    // - FIXME: To be consistent with all the newer API, ListBoxHeader/ListBoxFooter should in reality be called BeginListBox/EndListBox. Will rename them.
 
     public static void listBox(String label, ImInt currentItem, String[] items, int itemsCount) {
         nListBox(label, currentItem.data, items, itemsCount, -1);

imgui-binding/src/main/java/imgui/ImGuiIO.java

@@ -8,6 +8,8 @@ import imgui.callbacks.ImStrSupplier;
  * Access via ImGui::GetIO(). Read 'Programmer guide' section in .cpp file for general usage.
  */
 public final class ImGuiIO {
+    private ImFontAtlas imFontAtlas;
+
     ImGuiIO() {
     }
 
@@ -152,11 +154,70 @@ public final class ImGuiIO {
         ImGui::GetIO().KeyRepeatRate = keyRepeatRate;
     */
 
-    // TODO fonts configuration
+    /**
+     * Font atlas: load, rasterize and pack one or more fonts into a single texture.
+     */
+    public ImFontAtlas getFonts() {
+        // on demand instantiation
+        // will throw native exception if Dear ImGui context isn't created (like in the original library)
+        if (imFontAtlas == null) {
+            imFontAtlas = new ImFontAtlas(nGetFontsPtr());
+        }
+        return imFontAtlas;
+    }
 
-    // BINDING NOTICE: this is a stub to pass important for ImGui info
-    public native void setFontsTexID(int id); /*
-        ImGui::GetIO().Fonts->TexID = (ImTextureID)id;
+    private native long nGetFontsPtr(); /*
+        return (long)ImGui::GetIO().Fonts;
+    */
+
+    /**
+     * Font atlas: load, rasterize and pack one or more fonts into a single texture.
+     * <p>
+     * BINDING NOTICE: You SHOULD manually destroy previously used ImFontAtlas.
+     */
+    public void setFonts(final ImFontAtlas imFontAtlas) {
+        this.imFontAtlas = imFontAtlas;
+        nSetFonts(imFontAtlas.ptr);
+    }
+
+    private native void nSetFonts(long imFontAtlasPtr); /*
+        ImGui::GetIO().Fonts = (ImFontAtlas*)imFontAtlasPtr;
+    */
+
+    /**
+     * Global scale all fonts
+     */
+    public native float getFontGlobalScale(); /*
+        return ImGui::GetIO().FontGlobalScale;
+    */
+
+    /**
+     * Global scale all fonts
+     */
+    public native void setFontGlobalScale(float fontGlobalScale); /*
+        ImGui::GetIO().FontGlobalScale = fontGlobalScale;
+    */
+
+    /**
+     * Allow user scaling text of individual window with CTRL+Wheel.
+     */
+    public native boolean getFontAllowUserScaling(); /*
+        return ImGui::GetIO().FontAllowUserScaling;
+    */
+
+    /**
+     * Allow user scaling text of individual window with CTRL+Wheel.
+     */
+    public native void setFontAllowUserScaling(boolean fontAllowUserScaling); /*
+        ImGui::GetIO().FontAllowUserScaling = fontAllowUserScaling;
+    */
+
+    public void setFontDefault(final ImFont fontDefault) {
+        nSetFontDefault(fontDefault.ptr);
+    }
+
+    private native void nSetFontDefault(long fontDefaultPtr); /*
+        ImGui::GetIO().FontDefault = (ImFont*)fontDefaultPtr;
     */
 
     // Miscellaneous options
@@ -626,8 +687,7 @@ public final class ImGuiIO {
      * Queue new character input.
      */
     public native void addInputCharacter(int c); /*
-        if (c > 0 && c < 0x10000)
-            ImGui::GetIO().AddInputCharacter((unsigned short)c);
+        ImGui::GetIO().AddInputCharacter((unsigned int)c);
     */
 
     /**

imgui-binding/src/main/java/imgui/ImGuiStyle.java

@@ -440,4 +440,8 @@ public final class ImGuiStyle {
             env->DeleteLocalRef(jColors);
         }
     */
+
+    public native void scaleAllSizes(float scaleFactor); /*
+        ImGui::GetStyle().ScaleAllSizes(scaleFactor);
+    */
 }

imgui-binding/src/main/java/imgui/TexDataRGBA32.java

@@ -1,48 +0,0 @@
-package imgui;
-
-import java.nio.Buffer;
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-
-public final class TexDataRGBA32 {
-    public int width;
-    public int height;
-
-    public ByteBuffer pixelBuffer;
-
-    private TexDataRGBA32() {
-        final int pixelMax = 131072;
-        pixelBuffer = ByteBuffer.allocateDirect(pixelMax).order(ByteOrder.nativeOrder());
-    }
-
-    public static TexDataRGBA32 create() {
-        final TexDataRGBA32 data = new TexDataRGBA32();
-        data.nFillData(data.pixelBuffer);
-        return data;
-    }
-
-    /*JNI
-        #include <imgui.h>
-     */
-
-    private native void nFillData(Buffer pixelBuf); /*
-        jclass jTexDataClass = env->GetObjectClass(object);
-
-        if(jTexDataClass == NULL)
-            return;
-
-        jfieldID widthID = env->GetFieldID(jTexDataClass, "width", "I");
-        jfieldID heightID = env->GetFieldID(jTexDataClass, "height", "I");
-
-        unsigned char* pixels;
-        int width, height;
-
-        ImGuiIO& io = ImGui::GetIO();
-        io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
-
-        env->SetIntField(object, widthID, width);
-        env->SetIntField(object, heightID, height);
-
-        memcpy(pixelBuf, pixels, width * height * 4);
-    */
-}

imgui-lwjgl3/src/main/java/imgui/gl3/ImGuiImplGl3.java

@@ -1,14 +1,16 @@
 package imgui.gl3;
 
 import imgui.ImDrawData;
+import imgui.ImFontAtlas;
 import imgui.ImGui;
-import imgui.TexDataRGBA32;
+import imgui.ImInt;
 
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.UncheckedIOException;
+import java.nio.ByteBuffer;
 import java.util.Objects;
 
 import static org.lwjgl.opengl.GL30.*;
@@ -191,18 +193,21 @@ public final class ImGuiImplGl3 {
     }
 
     private void prepareFont() {
-        final TexDataRGBA32 texData = TexDataRGBA32.create();
-
         gFontTexture = glGenTextures();
 
+        final ImFontAtlas fontAtlas = ImGui.getIO().getFonts();
+        final ImInt width = new ImInt();
+        final ImInt height = new ImInt();
+        final ByteBuffer buffer = fontAtlas.getTexDataAsRGBA32(width, height);
+
         glBindTexture(GL_TEXTURE_2D, gFontTexture);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 
         glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
-        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texData.width, texData.height, 0, GL_RGBA, GL_UNSIGNED_BYTE, texData.pixelBuffer);
+        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width.get(), height.get(), 0, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
 
-        ImGui.getIO().setFontsTexID(gFontTexture);
+        fontAtlas.setTexID(gFontTexture);
     }
 
     private void backupGlState() {

imgui-lwjgl3/src/test/java/ImGuiGlfwExample.java

@@ -1,4 +1,6 @@
 import imgui.ImBool;
+import imgui.ImFontAtlas;
+import imgui.ImFontConfig;
 import imgui.ImGui;
 import imgui.ImGuiIO;
 import imgui.ImString;
@@ -11,13 +13,16 @@ import imgui.enums.ImGuiConfigFlags;
 import imgui.enums.ImGuiInputTextFlags;
 import imgui.enums.ImGuiKey;
 import imgui.enums.ImGuiMouseCursor;
-import imgui.enums.ImGuiWindowFlags;
 import imgui.gl3.ImGuiImplGl3;
 import org.lwjgl.glfw.GLFWErrorCallback;
 import org.lwjgl.glfw.GLFWVidMode;
 import org.lwjgl.opengl.GL;
 import org.lwjgl.system.MemoryStack;
 
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
 import java.nio.IntBuffer;
 import java.util.Objects;
 
@@ -47,16 +52,16 @@ public final class ImGuiGlfwExample {
     // Mouse cursors provided by GLFW
     private final long[] mouseCursors = new long[ImGuiMouseCursor.COUNT];
 
+    // LWJGL3 rendered itself (SHOULD be initialized)
     private final ImGuiImplGl3 imGuiGl3 = new ImGuiImplGl3();
 
-    // Local app variables go here
-    private final String imguiDemoLink = "https://raw.githubusercontent.com/ocornut/imgui/v1.74/imgui_demo.cpp";
-    private final byte[] testPayload = "Test Payload".getBytes();
+    // Local variables for application goes here
+    private final String imguiDemoLink = "https://raw.githubusercontent.com/ocornut/imgui/v1.74/imgui_demo.cpp"; // Link to put into clipboard
+    private final byte[] testPayload = "Test Payload".getBytes(); // Test data for payload. Should be represented as raw byt array.
     private String dropTargetText = "Drop Here";
-    private float[] backgroundColor = new float[]{0.5f, 0, 0};
+    private float[] backgroundColor = new float[]{0.5f, 0, 0}; // To modify background color dynamically
     private int clickCount = 0;
     private final ImString resizableStr = new ImString(5);
-
     private final ImBool showDemoWindow = new ImBool();
 
     public void run() {
@@ -67,7 +72,7 @@ public final class ImGuiGlfwExample {
         destroyGlfw();
     }
 
-    // Method initializes GLFW window. All code is mostly a copy-paste from the official LWJGL3 website.
+    // Method initializes GLFW window. All code is mostly a copy-paste from the official LWJGL3 "Get Started": https://www.lwjgl.org/guide
     private void initGlfw() {
         // Setup an error callback. The default implementation
         // will print the error message in System.err.
@@ -85,7 +90,7 @@ public final class ImGuiGlfwExample {
         glfwWindowHint(GLFW_MAXIMIZED, GLFW_TRUE); // the window will be maximized
 
         // Create the window
-        window = glfwCreateWindow(DEFAULT_WIDTH, DEFAULT_HEIGHT, "ImGui+GLFW+LWJGL Example", NULL, NULL);
+        window = glfwCreateWindow(DEFAULT_WIDTH, DEFAULT_HEIGHT, "Dear ImGui + GLFW + LWJGL Example", NULL, NULL);
 
         if (window == NULL) {
             throw new RuntimeException("Failed to create the GLFW window");
@@ -122,22 +127,21 @@ public final class ImGuiGlfwExample {
     // Here we will initialize ImGui stuff.
     private void initImGui() {
         // IMPORTANT!!
-        // This line is critical for ImGui to work.
+        // This line is critical for Dear ImGui to work.
         ImGui.createContext();
 
-        // ImGui provides three different color schemas for styling. We will use the classic one here.
+        // ImGui provides 3 different color schemas for styling. We will use the classic one here.
+        // Try others with ImGui.styleColors*() methods.
         ImGui.styleColorsClassic();
-        // ImGui.StyleColorsDark(); // This is a default style for ImGui
-        // ImGui.StyleColorsLight();
 
         // Initialize ImGuiIO config
         final ImGuiIO io = ImGui.getIO();
 
-        io.setIniFilename(null);
-        io.setConfigFlags(ImGuiConfigFlags.NavEnableKeyboard);
-        io.setBackendFlags(ImGuiBackendFlags.HasMouseCursors);
-        io.setBackendPlatformName("imgui_java_impl_glfw");
-        io.setBackendRendererName("imgui_java_impl_lwjgl");
+        io.setIniFilename(null); // We don't want to save .ini file
+        io.setConfigFlags(ImGuiConfigFlags.NavEnableKeyboard); // Navigation with keyboard
+        io.setBackendFlags(ImGuiBackendFlags.HasMouseCursors); // Mouse cursors to display while resizing windows etc.
+        io.setBackendPlatformName("imgui_java_impl_glfw"); // For debug purpose
+        io.setBackendRendererName("imgui_java_impl_lwjgl"); // For debug purpose
 
         // Keyboard mapping. ImGui will use those indices to peek into the io.KeysDown[] array.
         final int[] keyMap = new int[ImGuiKey.COUNT];
@@ -175,7 +179,9 @@ public final class ImGuiGlfwExample {
         mouseCursors[ImGuiMouseCursor.ResizeNWSE] = glfwCreateStandardCursor(GLFW_ARROW_CURSOR);
         mouseCursors[ImGuiMouseCursor.Hand] = glfwCreateStandardCursor(GLFW_HAND_CURSOR);
 
-        // Here goes GLFW callbacks to update user input stuff in ImGui
+        // ------------------------------------------------------------
+        // Here goes GLFW callbacks to update user input in Dear ImGui
+
         glfwSetKeyCallback(window, (w, key, scancode, action, mods) -> {
             if (action == GLFW_PRESS) {
                 io.setKeysDown(key, true);
@@ -230,10 +236,41 @@ public final class ImGuiGlfwExample {
             }
         });
 
-        // Initialize renderer itself
+        // ------------------------------------------------------------
+        // Fonts configuration
+
+        final ImFontAtlas fontAtlas = io.getFonts();
+
+        // Dear ImGui uses 'ProggyClean.ttf, 13px' by default
+        fontAtlas.addFontDefault();
+
+        final ImFontConfig fontConfig = new ImFontConfig(); // Keep in mind that creation of the ImFontConfig will allocate native memory
+        fontConfig.setRasterizerMultiply(1.2f); // This will make fonts a bit more readable
+        fontConfig.setGlyphRanges(fontAtlas.getGlyphRangesCyrillic()); // Additional glyphs could be added like here or in addFontFrom*() methods
+
+        // We can add new fonts directly from file
+        fontAtlas.addFontFromFileTTF("imgui-lwjgl3/src/test/resources/DroidSans.ttf", 13, fontConfig);
+        fontAtlas.addFontFromFileTTF("imgui-lwjgl3/src/test/resources/DroidSans.ttf", 14, fontConfig);
+        fontAtlas.addFontFromFileTTF("imgui-lwjgl3/src/test/resources/JetBrainsMono-Regular.ttf", 13, fontConfig);
+        fontAtlas.addFontFromFileTTF("imgui-lwjgl3/src/test/resources/JetBrainsMono-Regular.ttf", 14, fontConfig);
+
+        // Or directly from memory
+        fontConfig.setName("Roboto-Regular.ttf, 13px"); // This name will be displayed in Style Editor
+        fontAtlas.addFontFromMemoryTTF(loadFromResources("Roboto-Regular.ttf"), 13, fontConfig);
+        fontConfig.setName("Roboto-Regular.ttf, 14px"); // We can apply a new config value every time we add a new font
+        fontAtlas.addFontFromMemoryTTF(loadFromResources("Roboto-Regular.ttf"), 14, fontConfig);
+
+        // After fonts were added and since we won't use fontConfig again - we should clean it
+        fontConfig.destroy();
+
+        // IMPORTANT!!!
+        // Method initializes renderer itself.
+        // This method SHOULD be called after you've initialized your ImGui configuration (fonts and so on).
+        // ImGui context should be created as well.
         imGuiGl3.init();
     }
 
+    // Main application loop
     private void loop() {
         double time = 0; // to track our frame delta value
 
@@ -244,8 +281,9 @@ public final class ImGuiGlfwExample {
             final double deltaTime = (time > 0) ? (currentTime - time) : 1f / 60f;
             time = currentTime;
 
-            // Set the clear color
+            // Set the clear color and do clear itself
             glClearColor(backgroundColor[0], backgroundColor[1], backgroundColor[2], 0.0f);
+            glClear(GL_COLOR_BUFFER_BIT);
 
             // Get window size properties and mouse position
             glfwGetWindowSize(window, winWidth, winHeight);
@@ -265,16 +303,13 @@ public final class ImGuiGlfwExample {
             glfwSetCursor(window, mouseCursors[imguiCursor]);
             glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_NORMAL);
 
-            // Clear the framebuffer
-            glClear(GL_COLOR_BUFFER_BIT);
-
             // IMPORTANT!!
-            // Any ImGui code SHOULD go between NewFrame()/Render() methods
+            // Any Dear ImGui code SHOULD go between NewFrame()/Render() methods
             ImGui.newFrame();
-            showUi();  // ImGui calls goes here
+            showUi();
             ImGui.render();
 
-            // After ImGui#render call we provide draw data into LWJGL3 render.
+            // After ImGui#render call we provide draw data into LWJGL3 renderer.
             // At that moment ImGui will be rendered to the current OpenGL context.
             imGuiGl3.render(ImGui.getDrawData());
 
@@ -289,9 +324,14 @@ public final class ImGuiGlfwExample {
         ImGui.setNextWindowSize(600, 300, ImGuiCond.Once);
         ImGui.setNextWindowPos(10, 10, ImGuiCond.Once);
 
-        ImGui.begin("Custom window", ImGuiWindowFlags.NoDecoration);  // Start Custom window
-        ImGui.text("Hello from Java!");
+        ImGui.begin("Custom window");  // Start Custom window
 
+        // Simple text label
+        ImGui.checkbox("Show demo window", showDemoWindow);
+
+        ImGui.separator();
+
+        // Drag'n'Drop functionality
         ImGui.button("Drag me");
         if (ImGui.beginDragDropSource()) {
             ImGui.setDragDropPayload("payload_type", testPayload, testPayload.length);
@@ -308,11 +348,13 @@ public final class ImGuiGlfwExample {
             ImGui.endDragDropTarget();
         }
 
+        // Color picker
         ImGui.alignTextToFramePadding();
         ImGui.text("Background color:");
         ImGui.sameLine();
         ImGui.colorEdit3("##click_counter_col", backgroundColor, ImGuiColorEditFlags.NoInputs | ImGuiColorEditFlags.NoDragDrop);
 
+        // Simple click counter
         if (ImGui.button("Click")) {
             clickCount++;
         }
@@ -321,14 +363,24 @@ public final class ImGuiGlfwExample {
         }
         ImGui.sameLine();
         ImGui.text("Count: " + clickCount);
-        ImGui.checkbox("Show demo window", showDemoWindow);
-        ImGui.newLine();
-
-        ImGui.inputText("Resizable input", resizableStr, ImGuiInputTextFlags.CallbackResize);
-        ImGui.text(String.format("text len: %d | buffer size: %d", resizableStr.getLength(), resizableStr.getBufferSize()));
-        ImGui.newLine();
 
         ImGui.separator();
+
+        // Input field with auto-resize ability
+        ImGui.text("You can use text inputs with auto-resizable strings!");
+        ImGui.inputText("Resizable input", resizableStr, ImGuiInputTextFlags.CallbackResize);
+        ImGui.text("text len:");
+        ImGui.sameLine();
+        ImGui.textColored(.12f, .6f, 1, 1, Integer.toString(resizableStr.getLength()));
+        ImGui.sameLine();
+        ImGui.text("| buffer size:");
+        ImGui.sameLine();
+        ImGui.textColored(1, .6f, 0, 1, Integer.toString(resizableStr.getBufferSize()));
+
+        ImGui.separator();
+        ImGui.newLine();
+
+        // Link to the original demo file
         ImGui.text("Consider to look the original ImGui demo: ");
         ImGui.setNextItemWidth(500);
         ImGui.textColored(0, .8f, 0, 1, imguiDemoLink);
@@ -361,6 +413,23 @@ public final class ImGuiGlfwExample {
         Objects.requireNonNull(glfwSetErrorCallback(null)).free();
     }
 
+    private byte[] loadFromResources(final String fileName) {
+        try (InputStream is = Objects.requireNonNull(ImGuiGlfwExample.class.getClassLoader().getResourceAsStream(fileName));
+             ByteArrayOutputStream buffer = new ByteArrayOutputStream()) {
+
+            final byte[] data = new byte[16384];
+
+            int nRead;
+            while ((nRead = is.read(data, 0, data.length)) != -1) {
+                buffer.write(data, 0, nRead);
+            }
+
+            return buffer.toByteArray();
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+
     public static void main(final String[] args) {
         new ImGuiGlfwExample().run();
     }