From 05fd4b44e561c22645599be72196b4b0d5a1e8b8 Mon Sep 17 00:00:00 2001
From: Jaby <fenir50@web.de>
Date: Fri, 15 Dec 2023 23:00:53 -0500
Subject: [PATCH] Prepare font transfer

---
 src/Library/src/BootLoader/gpu_boot.cpp | 66 ++++++++++++++++++++++++-
 1 file changed, 65 insertions(+), 1 deletion(-)

diff --git a/src/Library/src/BootLoader/gpu_boot.cpp b/src/Library/src/BootLoader/gpu_boot.cpp
index e0215836..65250187 100644
--- a/src/Library/src/BootLoader/gpu_boot.cpp
+++ b/src/Library/src/BootLoader/gpu_boot.cpp
@@ -12,6 +12,19 @@
     #include "splash_image_ntsc_boot.hpp"
 #endif //JABYENGINE_PAL
 
+// | !    | "    | #    | $    | %    | &    | '    | (    | )    | *    | +    | ,    | -    | .    | /    | 0    |
+// | 8149 | 8168 | 8194 | 8190 | 8193 | 8195 | 8166 | 8169 | 816A | 8196 | 817B | 8143 | 817C | 8144 | 815E | 8250 |
+// | 1    | 2    | 3    | 4    | 5    | 6    | 7    | 8    | 9    | :    | ;    | <    | =    | >    | ?    | @    |
+// | 8251 | 8252 | 8253 | 8254 | 8255 | 8256 | 8257 | 8258 | 8259 | 8146 | 8147 | 8183 | 8181 | 8184 | 8148 | 8197 |
+// | A    | B    | C    | D    | E    | F    | G    | H    | I    | J    | K    | L    | M    | N    | O    | P    |
+// | 8260 | 8261 | 8262 | 8263 | 8264 | 8265 | 8266 | 8267 | 8268 | 8269 | 826A | 826B | 826C | 826D | 826E | 826F |
+// | Q    | R    | S    | T    | U    | V    | W    | X    | Y    | Z    | [    | \    | ]    | ^    | _    | `    |
+// | 8270 | 8271 | 8272 | 8273 | 8274 | 8275 | 8276 | 8277 | 8278 | 8279 | 816D | 815F | 816E | 814F | 8151 | 814D |
+// | a    | b    | c    | d    | e    | f    | g    | h    | i    | j    | k    | l    | m    | n    | o    | p    |
+// | 8281 | 8282 | 8283 | 8284 | 8285 | 8286 | 8287 | 8288 | 8289 | 828A | 828B | 828C | 828D | 828E | 828F | 8290 |
+// | q    | r    | s    | t    | u    | v    | w    | x    | y    | z    | {    | |    | }    | ~    |      |      | 
+// | 8291 | 8292 | 8293 | 8294 | 8295 | 8296 | 8297 | 8298 | 8299 | 829A | 816F | 8162 | 8170 | 8160 |      |      |
+
 extern "C" uint32_t __boot_loader_end;
 
 namespace JabyEngine {
@@ -25,8 +38,57 @@ namespace JabyEngine {
         namespace GPU {
             using namespace JabyEngine::GPU;
 
+            namespace SJIS {
+                struct SpecialChar {
+                    uint8_t base_offset;
+                    uint8_t tile_id;
+                };
+
+                struct RangeChar {
+                    SpecialChar start_char;
+                    uint8_t     length;
+                };
+
+                // base: 0x8100
+                static const SpecialChar Specials[] = { // ToDo: Can we split this into 4 arrays? Would that help somehow?
+                 // {   !   }  {   "   }  {   #   }  {   $   }  {   %   }  {   &   }  {   '   }  {   (   }  {   )   }  {   *   }  {    +   }  {    ,   }  {    -   }  {    .   }  {    /   }
+                    {0x49, 0}, {0x68, 1}, {0x94, 2}, {0x90, 3}, {0x93, 4}, {0x95, 5}, {0x66, 6}, {0x69, 7}, {0x6A, 8}, {0x96, 9}, {0x7B, 10}, {0x43, 11}, {0x7C, 12}, {0x44, 13}, {0x5E, 14},
+                 // {    :   }  {    ;   }  {    <   }  {    =   }  {    >   }  {    ?   }  {    @   }
+                    {0x46, 25}, {0x47, 26}, {0x83, 27}, {0x81, 28}, {0x84, 29}, {0x48, 30}, {0x97, 31},
+                 // {    [   }  {    \   }  {    ]   }  {    ^   }  {    _   }  {    `   }   
+                    {0x6D, 58}, {0x5F, 59}, {0x6E, 60}, {0x4F, 61}, {0x51, 62}, {0x4D, 63},
+                 // {    {   }  {    |   }  {    }   }  {    ~   }   
+                    {0x6F, 90}, {0x62, 91}, {0x70, 92}, {0x60, 93}
+                };
+
+                // base: 0x8200
+                //                                           {     0 - 9    }
+                static const auto Numbers         = RangeChar{{0x50, 15}, 10}; 
+                //                                           {     A - Z    }
+                static const auto UpperCaseLetter = RangeChar{{0x60, 32}, 26};
+                //                                           {     a - z    }
+                static const auto LowerCaseLetter = RangeChar{{0x81, 64}, 26};
+
+                void load() {
+                    alignas(uint32_t) Color test[16*16];
+
+                    for(auto& color : test) {
+                        color = Color::from_rgb(0, 0xFF, 0xFF);
+                    }
+
+                    GPU::internal::DMA::Receive::prepare();
+                    GPU::internal::DMA::Receive::set_dst(PositionU16::create(0, 0), SizeU16::create(16, 16)); 
+                    GPU::internal::DMA::Receive::set_src(reinterpret_cast<const uintptr_t>(test));
+                    printf("Sending...\n");
+                    GPU::internal::DMA::Receive::start(sizeof(test)/4/16);
+                    GPU::internal::DMA::wait();
+                    GPU::internal::DMA::end();
+                    printf("Done!\n");
+                }
+            }
+
             static void configurate_display() {
-                // Ideal I hope that an offset of 0,0 will produce a well enough centered picture for every TV
+                // Ideal I hope that an offset of 0,0 will produce a well enough centered picture for every TV for now
                 GPU_IO::GP1.write(GPU_IO::Command::DisplayMode(::JabyEngine::GPU::internal::Display::DisplayMode));
                 GPU::Display::set_offset(0, 0);
             }
@@ -59,6 +121,8 @@ namespace JabyEngine {
                 auto state = FileProcessor::create(&__boot_loader_end, SimpleTIM(32, 0, 0, 0));
                 state.process(bytes_ready);
 
+                SJIS::load();
+
                 // Duplicate DisplayBuffer content
                 ::JabyEngine::GPU::internal::copy_vram_to_vram({PositionU16::create(0, Display::Height), SizeU16::create(Display::Width, Display::Height)}, PositionU16::create(0, 0));