From 378196d422e4a454634b63c61aa5cad856f7c452 Mon Sep 17 00:00:00 2001
From: jaby <jaby@william.zone>
Date: Wed, 21 Jun 2023 22:36:31 +0200
Subject: [PATCH] Support simple sentances

---
 .../src/FontWriter/font_writer.cpp            | 77 +++++++++++++++++++
 .../src/FontWriter/font_writer.hpp            | 14 ++++
 examples/PoolBox/application/src/main.cpp     | 24 +++---
 3 files changed, 102 insertions(+), 13 deletions(-)
 create mode 100644 examples/PoolBox/application/src/FontWriter/font_writer.cpp
 create mode 100644 examples/PoolBox/application/src/FontWriter/font_writer.hpp

diff --git a/examples/PoolBox/application/src/FontWriter/font_writer.cpp b/examples/PoolBox/application/src/FontWriter/font_writer.cpp
new file mode 100644
index 00000000..1d524acb
--- /dev/null
+++ b/examples/PoolBox/application/src/FontWriter/font_writer.cpp
@@ -0,0 +1,77 @@
+#include "../assets.hpp"
+#include "font_writer.hpp"
+#include <PSX/GPU/gpu.hpp>
+#include <PSX/GPU/gpu_primitives.hpp>
+
+namespace FontWriter {
+    using namespace JabyEngine;
+    static GPU::TexPage::Linked CharTexPage[2] = {
+        GPU::TexPage({Assets::FontTIM.get_texture_x(), Assets::FontTIM.get_texture_y()}, GPU::TexturePageColor::$4bit).linked(),
+        GPU::TexPage({Assets::FontTIM.get_texture_x(), Assets::FontTIM.get_texture_y()}, GPU::TexturePageColor::$4bit).linked()
+    };
+    static GPU::SPRT_16::Linked  TextBuffer[2][TextBufferSize];
+    static GPU::Link*            TextLink;
+    static GPU::SPRT_16::Linked* TextPtr;
+
+    static void reset_links() {
+        TextLink = &CharTexPage[GPU::Display::current_id];
+        TextPtr  = TextBuffer[GPU::Display::current_id];
+    }
+
+    void setup() {
+        reset_links();
+        for(auto& char_array : TextBuffer) {
+            for(auto& single_char : char_array) {
+                single_char->set_identitiy();
+                single_char->clut = GPU::PageClut(Assets::FontTIM.get_clut_x(), Assets::FontTIM.get_clut_y());
+            }
+        }
+    }
+
+    void write(int16_t x, int16_t y, const char* text) {
+        const auto* cur_text_end = &TextBuffer[GPU::Display::current_id][TextBufferSize];
+        const auto  org_x        = x;
+
+        while(TextPtr < cur_text_end) {
+            const char cur_char = *text;
+            text++;
+
+            (*TextPtr)->position = {x, y};
+            switch(cur_char) {
+                case '\0':
+                    return;
+                case '\n':
+                    y += 16;
+                    x  = org_x;
+                    continue;
+                
+                case 'i':
+                case '!':
+                    x += 12;
+                    break;
+
+                default:
+                    x += 16;
+            }
+
+            if(cur_char == '\0') {
+                break;
+            }
+
+            const uint8_t char_id = cur_char - '!';
+            (*TextPtr)->page     = {static_cast<uint8_t>((char_id & 0xF) << 4), static_cast<uint8_t>((char_id >> 4) << 4)};
+            (*TextPtr)->color    = GPU::Color24::Grey();
+
+            TextLink = &TextLink->concat(*TextPtr);
+            TextPtr++;
+        }
+    }
+
+    void render() {
+        const auto render_id = GPU::Display::current_id ^ 1;
+
+        TextLink->terminate();
+        GPU::render(CharTexPage[render_id]);
+        reset_links();
+    }
+}
diff --git a/examples/PoolBox/application/src/FontWriter/font_writer.hpp b/examples/PoolBox/application/src/FontWriter/font_writer.hpp
new file mode 100644
index 00000000..372cad4e
--- /dev/null
+++ b/examples/PoolBox/application/src/FontWriter/font_writer.hpp
@@ -0,0 +1,14 @@
+#ifndef __FONT_WRITER_HPP__
+#define __FONT_WRITER_HPP__
+#include <stdint.h>
+
+namespace FontWriter {
+    static constexpr auto TextBufferSize = 1024;
+
+    void setup();
+
+    void write(int16_t x, int16_t y, const char* text);
+    void render();
+}
+
+#endif //!__FONT_WRITER_HPP__
\ No newline at end of file
diff --git a/examples/PoolBox/application/src/main.cpp b/examples/PoolBox/application/src/main.cpp
index 277b9103..c792bc21 100644
--- a/examples/PoolBox/application/src/main.cpp
+++ b/examples/PoolBox/application/src/main.cpp
@@ -1,25 +1,23 @@
+#include "FontWriter/font_writer.hpp"
 #include "assets.hpp"
 #include <PSX/GPU/gpu_primitives.hpp>
 #include <PSX/GPU/gpu.hpp>
 #include <stdio.h>
 
 using namespace JabyEngine;
-static auto FontPage = GPU::TexPage({Assets::FontTIM.get_texture_x(), Assets::FontTIM.get_texture_y()}, GPU::TexturePageColor::$4bit).linked();
-static auto FontTest = GPU::SPRT(
-    GPU::AreaI16({0, 0}, {256, 96}), {GPU::PagePosition(0, 0), GPU::PageClut(Assets::FontTIM.get_clut_x(), Assets::FontTIM.get_clut_y())}, 
-    GPU::Color24::Grey()
-).linked();
-static auto FontTestColor = GPU::SPRT(
-    GPU::AreaI16({0, 96}, {256, 96}), {GPU::PagePosition(0, 0), GPU::PageClut(Assets::FontTIM.get_clut_x(), Assets::FontTIM.get_clut_y())}, 
-    GPU::Color24(0x0, 0x0, 0xA0)
-).linked();
+
+static void setup() {
+    Assets::load_for_main();
+    FontWriter::setup();
+}
 
 void main() {
-    Assets::load_for_main();
-    
-    FontPage.concat(FontTest).concat(FontTestColor);
+    setup();
+
     while(true) {
+        FontWriter::write(0, 32, "Cody is cute\n&\na BAAAAABY!!!");
+
         GPU::swap_buffers_vsync(1);
-        GPU::render(FontPage);
+        FontWriter::render();
     }
 }
\ No newline at end of file