[fonts] Add ImFont

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/ImGui.java

@@ -50,6 +50,7 @@ public final class ImGui {
         ImFontAtlas.nInit();
         ImFontConfig.nInit();
         ImFontGlyph.nInit();
+        ImFont.nInit();
         nInitInputTextData();
     }
 

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

@@ -19,10 +19,6 @@ public final class ImGuiIO {
         #include "jni_callbacks.h"
      */
 
-    private native long nGetFontsPtr(); /*
-        return (long)ImGui::GetIO().Fonts;
-    */
-
     //------------------------------------------------------------------
     // Configuration (fill once)
     //------------------------------------------------------------------
@@ -170,19 +166,24 @@ public final class ImGuiIO {
         return imFontAtlas;
     }
 
+    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:
-     * <pre>
-     *     io.getFonts().destroy();
-     *     io.setFonts(newImFontAtlas);
-     * </pre>
+     * BINDING NOTICE: You SHOULD manually destroy previously used ImFontAtlas.
      */
     public void setFonts(final ImFontAtlas imFontAtlas) {
         this.imFontAtlas = imFontAtlas;
+        nSetImFontAtlas(imFontAtlas.ptr);
     }
 
+    private native void nSetImFontAtlas(long imFontAtlasPtr); /*
+        ImGui::GetIO().Fonts = (ImFontAtlas*)imFontAtlasPtr;
+    */
+
     // TODO fonts configuration
 
     // Miscellaneous options