From c1a8b14a909e1a458e17617134bebfcb92974fd2 Mon Sep 17 00:00:00 2001
From: Piotr Krygier <everyonecancode@gmail.com>
Date: Mon, 5 Feb 2024 15:02:20 +0100
Subject: [PATCH] [WIP] Fonts update

---
 graphics/src/rse_text_renderer.c | 43 ++++++++++++++++++++++++++------
 graphics/src/rse_vulkan_image.c  |  2 +-
 2 files changed, 36 insertions(+), 9 deletions(-)

diff --git a/graphics/src/rse_text_renderer.c b/graphics/src/rse_text_renderer.c
index 991d5de0..69ce5867 100644
--- a/graphics/src/rse_text_renderer.c
+++ b/graphics/src/rse_text_renderer.c
@@ -5,24 +5,37 @@
 #include "freetype/fttypes.h"
 #include "locale_fonts.h"
 #include "rse_font_errors.h"
+#include "src/mesh_controller.h"
+#include "src/vulkan_commons.h"
 #include "utilities/logger.h"
 #include "utilities/rse_commons.h"
 #include "utilities/rse_errors_common.h"
 #include "rse_vulkan_image.h"
 
-#include "ft2build.h"
 #include "vulkan/vulkan_core.h"
 #include FT_FREETYPE_H
 
-#define FONT_CHARACTERS_COUNT 126
+/* Load only ASCII characters that are needed. TODO: Add unicode characters */
+#define FONT_CHARACTERS_COUNT 94
 
-uint16_t g_font_textures[FONT_CHARACTERS_COUNT];
+struct font_data_t {
+    uint16_t mesh_id;
+    uint16_t texture_id;
+    uint16_t width;
+    uint16_t height;
+    uint16_t bearing_x;
+    uint16_t bearing_y;
+    uint16_t advance;
+};
+
+struct font_data_t g_fonts_data[FONT_CHARACTERS_COUNT];
 
 FT_Library g_library;
 rse_err_t rse_fonts_initialize()
 {
     FT_Error error;
 
+    memset(g_fonts_data, 0, sizeof(g_fonts_data));
     error = FT_Init_FreeType(&g_library);
 
     if (error) {
@@ -39,6 +52,8 @@ rse_err_t rse_fonts_load_from_file(const char* file_path)
     FT_Error error;
     FT_Face face;
     size_t iter = 0U;
+    struct rse_vertex_t font_vertices[4];
+    const uint16_t font_indices[] = {0, 1, 2, 2, 3, 0};
 
     error = FT_New_Face(g_library, file_path, 0, &face);
 
@@ -47,8 +62,8 @@ rse_err_t rse_fonts_load_from_file(const char* file_path)
         return FONT_ERROR_LOAD_FAILED;
     }
 
-    /* By default we set font size to 16px. TODO: change later? */
-    error = FT_Set_Pixel_Sizes(face, 0, 48);
+    /* By default we set font size to 200px. TODO: change later? It looks OK though.. It looks OK though.... */
+    error = FT_Set_Pixel_Sizes(face, 0, 200);
 
     if (error) {
         LOGF(font_messages[FONT_CHANGE_SIZE_FAILED]);
@@ -57,18 +72,30 @@ rse_err_t rse_fonts_load_from_file(const char* file_path)
 
     /* Convert font face to textured image */
     /* Loading only needed ascii characters, from 40 (space) to 126 (~) */
-    for (iter = 33U; iter < face->num_glyphs && iter < 127U; ++iter) {
-        error = FT_Load_Char(face, iter, FT_LOAD_RENDER);
+    for (iter = 0U; iter < face->num_glyphs && iter < FONT_CHARACTERS_COUNT; ++iter) {
+        error = FT_Load_Char(face, iter + 33U, FT_LOAD_RENDER);
 
         if (error) {
             LOGF(font_messages[FONT_LOAD_GLYPH_FAILED]);
             return FONT_ERROR_LOAD_GLYPH_FAILED;
         }
 
+        g_fonts_data[iter].width = face->glyph->bitmap.width;
+        g_fonts_data[iter].height = face->glyph->bitmap.rows;
+        g_fonts_data[iter].bearing_x = face->glyph->bitmap_left;
+        g_fonts_data[iter].bearing_y = face->glyph->bitmap_top;
+        g_fonts_data[iter].advance = face->glyph->advance.x;
+
+        font_vertices[0] = (struct rse_vertex_t) {
+            {0.0f, 0.0f, 0.0f}, {1.0f, 1.0f, 1.0f}, {0.0f, 0.0f}
+        };
+        font_vertices[1] = (struct rse_vertex_t) {
+            {0.0f, 0.0f, 0.0f}, {1.0f, 1.0f, 1.0f}, {0.0f, 0.0f}
+        };
         STATUS_CHECK(rse_load_texture_from_bitmat(face->glyph->bitmap.buffer,
                                      face->glyph->bitmap.width,
                                      face->glyph->bitmap.rows,
-                                     &g_font_textures[iter], VK_FORMAT_R8_UNORM));
+                                     &g_fonts_data[iter].texture_id, VK_FORMAT_R8_UNORM));
     }
     return status;
 }
diff --git a/graphics/src/rse_vulkan_image.c b/graphics/src/rse_vulkan_image.c
index f127c7fe..2f77f0c6 100644
--- a/graphics/src/rse_vulkan_image.c
+++ b/graphics/src/rse_vulkan_image.c
@@ -412,7 +412,7 @@ rse_err_t rse_load_texture_from_bitmat(const unsigned char* pixel_buffer, int wi
     rse_err_t status = RSE_ERROR_NO_ERROR;
 
     /* Create actual Vulkan Image */
-   STATUS_CHECK(create_textured_image(width,
+    STATUS_CHECK(create_textured_image(width,
                                         height,
                                         color_format,
                                         pixel_buffer, texture_id));