Use libschrift instead of Freetype for font rendering

Makefile

@@ -55,7 +55,7 @@ CXXFLAGS += -DDEBUG -DVERBOSE_DEBUG -g
 CFLAGS += -DDEBUG -DVERBOSE_DEBUG -g
 endif
 
-LIBS	:= -lwums -lwut -lwups -lfunctionpatcher -lmappedmemory -lfreetype -lbz2 -lpng -lz
+LIBS	:= -lwums -lwut -lwups -lfunctionpatcher -lmappedmemory -lz
 
 #-------------------------------------------------------------------------------
 # list of directories containing libraries, this must be the top level

source/utils/ConfigUtils.cpp

@@ -641,7 +641,10 @@ void ConfigUtils::openConfigMenu() {
     OSScreenFlipBuffersEx(SCREEN_DRC);
 
     DrawUtils::initBuffers(screenbuffer0, screen_buf0_size, screenbuffer1, screen_buf1_size);
-    DrawUtils::initFont();
+    if (!DrawUtils::initFont()) {
+        DEBUG_FUNCTION_LINE_ERR("Failed to init Font");
+        goto error_exit;
+    }
 
     // disable the home button menu to prevent opening it when exiting
     OSEnableHomeButtonMenu(false);

source/utils/DrawUtils.cpp

@@ -1,10 +1,12 @@
 #include "DrawUtils.h"
 
+#include "logger.h"
+#include <coreinit/cache.h>
 #include <coreinit/memory.h>
 #include <coreinit/screen.h>
-#include <ft2build.h>
+#include <cstdlib>
 #include <png.h>
-#include FT_FREETYPE_H
+
 
 // buffer width
 #define TV_WIDTH  0x500
@@ -16,10 +18,8 @@ uint8_t *DrawUtils::tvBuffer  = nullptr;
 uint32_t DrawUtils::tvSize    = 0;
 uint8_t *DrawUtils::drcBuffer = nullptr;
 uint32_t DrawUtils::drcSize   = 0;
+static SFT pFont              = {};
 
-// Don't put those into the clase or we have to include ft everywhere
-static FT_Library ft_lib = nullptr;
-static FT_Face ft_face   = nullptr;
 static Color font_col(0xFFFFFFFF);
 
 void DrawUtils::initBuffers(void *tvBuffer_, uint32_t tvSize_, void *drcBuffer_, uint32_t drcSize_) {
@@ -201,34 +201,49 @@ void DrawUtils::drawPNG(uint32_t x, uint32_t y, const uint8_t *data) {
     png_destroy_read_struct(&png_ptr, &info_ptr, nullptr);
 }
 
-void DrawUtils::initFont() {
+bool DrawUtils::initFont() {
     void *font    = nullptr;
     uint32_t size = 0;
     OSGetSharedData(OS_SHAREDDATATYPE_FONT_STANDARD, 0, &font, &size);
 
     if (font && size) {
-        FT_Init_FreeType(&ft_lib);
+        pFont.xScale = 20;
-        FT_New_Memory_Face(ft_lib, (FT_Byte *) font, size, 0, &ft_face);
+        pFont.yScale = 20,
+        pFont.flags  = SFT_DOWNWARD_Y;
+        pFont.font   = sft_loadmem(font, size);
+        if (!pFont.font) {
+            return false;
+        }
+        OSMemoryBarrier();
+        return true;
     }
+    return false;
 }
 
 void DrawUtils::deinitFont() {
-    FT_Done_Face(ft_face);
+    sft_freefont(pFont.font);
-    FT_Done_FreeType(ft_lib);
+    pFont.font = nullptr;
+    pFont      = {};
 }
 
 void DrawUtils::setFontSize(uint32_t size) {
-    FT_Set_Pixel_Sizes(ft_face, 0, size);
+    pFont.xScale = size;
+    pFont.yScale = size;
+    SFT_LMetrics metrics;
+    sft_lmetrics(&pFont, &metrics);
 }
 
 void DrawUtils::setFontColor(Color col) {
     font_col = col;
 }
 
-static void draw_freetype_bitmap(FT_Bitmap *bitmap, FT_Int x, FT_Int y) {
+static void draw_freetype_bitmap(SFT_Image *bmp, int32_t x, int32_t y) {
-    FT_Int i, j, p, q;
+    int32_t i, j, p, q;
-    FT_Int x_max = x + bitmap->width;
+
-    FT_Int y_max = y + bitmap->rows;
+    int32_t x_max = x + bmp->width;
+    int32_t y_max = y + bmp->height;
+
+    auto *src = (uint8_t *) bmp->pixels;
 
     for (i = x, p = 0; i < x_max; i++, p++) {
         for (j = y, q = 0; j < y_max; j++, q++) {
@@ -236,7 +251,7 @@ static void draw_freetype_bitmap(FT_Bitmap *bitmap, FT_Int x, FT_Int y) {
                 continue;
             }
 
-            float opacity = bitmap->buffer[q * bitmap->pitch + p] / 255.0f;
+            float opacity = src[q * bmp->width + p] / 255.0f;
             DrawUtils::drawPixel(i, j, font_col.r, font_col.g, font_col.b, font_col.a * opacity);
         }
     }
@@ -259,27 +274,59 @@ void DrawUtils::print(uint32_t x, uint32_t y, const char *string, bool alignRigh
 }
 
 void DrawUtils::print(uint32_t x, uint32_t y, const wchar_t *string, bool alignRight) {
-    FT_GlyphSlot slot = ft_face->glyph;
+    auto penX = (int32_t) x;
-    FT_Vector pen     = {(int) x, (int) y};
+    auto penY = (int32_t) y;
 
     if (alignRight) {
-        pen.x -= getTextWidth(string);
+        penX -= getTextWidth(string);
     }
 
+    uint16_t textureWidth = 0, textureHeight = 0;
     for (; *string; string++) {
-        uint32_t charcode = *string;
+        SFT_Glyph gid; //  unsigned long gid;
+        if (sft_lookup(&pFont, *string, &gid) >= 0) {
+            SFT_GMetrics mtx;
+            if (sft_gmetrics(&pFont, gid, &mtx) < 0) {
+                DEBUG_FUNCTION_LINE_ERR("Failed to get glyph metrics");
+                return;
+            }
 
-        if (charcode == '\n') {
+            if (*string == '\n') {
-            pen.y += ft_face->size->metrics.height >> 6;
+                penY += mtx.minHeight;
-            pen.x = x;
+                penX = x;
-            continue;
+                continue;
+            }
+
+            textureWidth  = (mtx.minWidth + 3) & ~3;
+            textureHeight = mtx.minHeight;
+
+            SFT_Image img = {
+                    .pixels = nullptr,
+                    .width  = textureWidth,
+                    .height = textureHeight,
+            };
+
+            if (textureWidth == 0) {
+                textureWidth = 4;
+            }
+            if (textureHeight == 0) {
+                textureHeight = 4;
+            }
+
+            img.pixels = malloc(img.width * img.height);
+            if (!img.pixels) {
+                DEBUG_FUNCTION_LINE_ERR("Failed to allocate memory for glyph");
+                return;
+            }
+            if (sft_render(&pFont, gid, img) < 0) {
+                DEBUG_FUNCTION_LINE_ERR("Failed to render glyph");
+                return;
+            } else {
+                draw_freetype_bitmap(&img, (int32_t) (penX + mtx.leftSideBearing), (int32_t) (penY + mtx.yOffset));
+                penX += (int32_t) mtx.advanceWidth;
+            }
+            free(img.pixels);
         }
-
-        FT_Load_Glyph(ft_face, FT_Get_Char_Index(ft_face, charcode), FT_LOAD_DEFAULT);
-        FT_Render_Glyph(slot, FT_RENDER_MODE_NORMAL);
-
-        draw_freetype_bitmap(&slot->bitmap, pen.x + slot->bitmap_left, pen.y - slot->bitmap_top);
-        pen.x += slot->advance.x >> 6;
     }
 }
 
@@ -302,14 +349,18 @@ uint32_t DrawUtils::getTextWidth(const char *string) {
 }
 
 uint32_t DrawUtils::getTextWidth(const wchar_t *string) {
-    FT_GlyphSlot slot = ft_face->glyph;
+    uint32_t width = 0;
-    uint32_t width    = 0;
 
     for (; *string; string++) {
-        FT_Load_Glyph(ft_face, FT_Get_Char_Index(ft_face, *string), FT_LOAD_BITMAP_METRICS_ONLY);
+        SFT_Glyph gid; //  unsigned long gid;
-
+        if (sft_lookup(&pFont, *string, &gid) >= 0) {
-        width += slot->advance.x >> 6;
+            SFT_GMetrics mtx;
+            if (sft_gmetrics(&pFont, gid, &mtx) < 0) {
+                DEBUG_FUNCTION_LINE_ERR("bad glyph metrics");
+            }
+            width += (int32_t) mtx.advanceWidth;
+        }
     }
 
-    return width;
+    return (uint32_t) width;
 }

source/utils/DrawUtils.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "schrift.h"
 #include <cstdint>
 
 // visible screen sizes
@@ -49,7 +50,7 @@ public:
 
     static void drawPNG(uint32_t x, uint32_t y, const uint8_t *data);
 
-    static void initFont();
+    static bool initFont();
 
     static void deinitFont();
 

source/utils/schrift.h

@@ -0,0 +1,88 @@
+/* This file is part of libschrift.
+ *
+ * © 2019-2022 Thomas Oltmann and contributors
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#ifndef SCHRIFT_H
+#define SCHRIFT_H 1
+
+#include <stddef.h> /* size_t */
+#include <stdint.h> /* uint_fast32_t, uint_least32_t */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SFT_DOWNWARD_Y 0x01
+
+typedef struct SFT SFT;
+typedef struct SFT_Font SFT_Font;
+typedef uint_least32_t SFT_UChar; /* Guaranteed to be compatible with char32_t. */
+typedef uint_fast32_t SFT_Glyph;
+typedef struct SFT_LMetrics SFT_LMetrics;
+typedef struct SFT_GMetrics SFT_GMetrics;
+typedef struct SFT_Kerning SFT_Kerning;
+typedef struct SFT_Image SFT_Image;
+
+struct SFT {
+    SFT_Font *font;
+    double xScale;
+    double yScale;
+    double xOffset;
+    double yOffset;
+    int flags;
+};
+
+struct SFT_LMetrics {
+    double ascender;
+    double descender;
+    double lineGap;
+};
+
+struct SFT_GMetrics {
+    double advanceWidth;
+    double leftSideBearing;
+    int yOffset;
+    int minWidth;
+    int minHeight;
+};
+
+struct SFT_Kerning {
+    double xShift;
+    double yShift;
+};
+
+struct SFT_Image {
+    void *pixels;
+    int width;
+    int height;
+};
+
+const char *sft_version(void);
+
+SFT_Font *sft_loadmem(const void *mem, size_t size);
+void sft_freefont(SFT_Font *font);
+
+int sft_lmetrics(const SFT *sft, SFT_LMetrics *metrics);
+int sft_lookup(const SFT *sft, SFT_UChar codepoint, SFT_Glyph *glyph);
+int sft_gmetrics(const SFT *sft, SFT_Glyph glyph, SFT_GMetrics *metrics);
+int sft_kerning(const SFT *sft, SFT_Glyph leftGlyph, SFT_Glyph rightGlyph,
+                SFT_Kerning *kerning);
+int sft_render(const SFT *sft, SFT_Glyph glyph, SFT_Image image);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif