shithub: zelda3

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Add support for ZSPR files to change Link's appearance

--- a/config.c

+++ b/config.c

@@ -246,6 +246,9 @@

       return true;

     } else if (StringEqualsNoCase(key, "NoSpriteLimits")) {

       return ParseBool(value, &g_config.no_sprite_limits);

+    } else if (StringEqualsNoCase(key, "LinkGraphics")) {

+      g_config.link_graphics = value;

+      return true;

     }

   } else if (section == 2) {

     if (StringEqualsNoCase(key, "EnableAudio")) {

@@ -399,7 +402,7 @@

       }

     }

   }

-  free(file);

+  g_config.memory_buffer = file;

 }

 void AfterConfigParse() {

--- a/config.h

+++ b/config.h

@@ -51,6 +51,9 @@

   bool display_perf_title;

   bool enable_msu;

   uint32 features0;

+

+  const char *link_graphics;

+  uint8 *memory_buffer;

 } Config;

 extern Config g_config;

--- a/load_gfx.c

+++ b/load_gfx.c

@@ -7,7 +7,9 @@

 #include "sprite.h"

 #include "assets.h"

-static const uint16 kGlovesColor[2] = {0x52f6, 0x376};

+// Allow this to be overwritten

+uint16 kGlovesColor[2] = {0x52f6, 0x376};

+

 static const uint8 kGraphics_IncrementalVramUpload_Dst[16] = {0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f};

 static const uint8 kGraphics_IncrementalVramUpload_Src[16] = {0x0, 0x2, 0x4, 0x6, 0x8, 0xa, 0xc, 0xe, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e};

 static const uint16 kPaletteFilteringBits[64] = {

--- a/load_gfx.h

+++ b/load_gfx.h

@@ -1,4 +1,5 @@

-#pragma once

+#ifndef ZELDA3_LOAD_GFX_H_

+#define ZELDA3_LOAD_GFX_H_

 enum {

   kSrmOffs_Gloves = 0x354,

@@ -10,6 +11,8 @@

   kSrmOffs_Health = 0x36c,

 };

+extern uint16 kGlovesColor[2];

+

 const uint16 *GetFontPtr();

 void ApplyPaletteFilter_bounce();

 void PaletteFilter_Range(int from, int to);

@@ -160,3 +163,5 @@

 void Palette_LoadForFileSelect_Shield(int k, uint8 shield);

 void Palette_LoadAgahnim();

 void HandleScreenFlash();

+

+#endif // ZELDA3_LOAD_GFX_H_

--- a/main.c

+++ b/main.c

@@ -22,9 +22,12 @@

 #include "config.h"

 #include "assets.h"

+#include "load_gfx.h"

+

 // Forwards

-static bool LoadRom(const char *name);

+static bool LoadRom(const char *filename);

+static void LoadLinkGraphics();

 static void PlayAudio(SDL_AudioDeviceID device, int channels, int16 *audioBuffer);

 static void RenderScreen(SDL_Window *window, SDL_Renderer *renderer, SDL_Texture *texture, bool fullscreen);

 static void HandleInput(int keyCode, int modCode, bool pressed);

@@ -194,7 +197,9 @@

   ParseConfigFile();

   AfterConfigParse();

   LoadAssets();

+  LoadLinkGraphics();

+

   ZeldaInitialize();

   g_zenv.ppu->extraLeftRight = UintMin(g_config.extended_aspect_ratio, kPpuExtraLeftRight);

   g_snes_width = 2 * (g_config.extended_aspect_ratio * 2 + 256);

@@ -653,6 +658,39 @@

   free(file);

   return result;

 }

+

+static bool ParseLinkGraphics(uint8 *file, size_t length) {

+  if (length < 27 || memcmp(file, "ZSPR", 4) != 0)

+    return false;

+  uint32 pixel_offs = DWORD(file[9]);

+  uint32 pixel_length = WORD(file[13]);

+  uint32 palette_offs = DWORD(file[15]);

+  uint32 palette_length = WORD(file[19]);

+  if ((uint64)pixel_offs + pixel_length > length ||

+      (uint64)palette_offs + palette_length > length ||

+      pixel_length != 0x7000)

+    return false;

+  if (kPalette_ArmorAndGloves_SIZE != 150 || kLinkGraphics_SIZE != 0x7000)

+    Die("ParseLinkGraphics: Invalid asset sizes");

+  memcpy(kLinkGraphics, file + pixel_offs, 0x7000);

+  if (palette_length >= 120)

+    memcpy(kPalette_ArmorAndGloves, file + palette_offs, 120);

+  if (palette_length >= 124)

+    memcpy(kGlovesColor, file + palette_offs + 120, 4);

+  return true;

+}

+

+static void LoadLinkGraphics() {

+  if (g_config.link_graphics) {

+    fprintf(stderr, "Loading Link Graphics: %s\n", g_config.link_graphics);

+    size_t length = 0;

+    uint8 *file = ReadFile(g_config.link_graphics, &length);

+    if (file == NULL || !ParseLinkGraphics(file, length))

+      Die("Unable to load file");

+    free(file);

+  }

+}

+

 const uint8 *g_asset_ptrs[kNumberOfAssets];

 uint32 g_asset_sizes[kNumberOfAssets];

--- a/types.h

+++ b/types.h

@@ -48,6 +48,7 @@

 #define BYTE(x) (*(uint8*)&(x))

 #define HIBYTE(x) (((uint8*)&(x))[1])

 #define WORD(x) (*(uint16*)&(x))

+#define DWORD(x) (*(uint32*)&(x))

 #define XY(x, y) ((y)*64+(x))

 static inline uint16 swap16(uint16 v) { return (v << 8) | (v >> 8); }

--- a/zelda3.ini

+++ b/zelda3.ini

@@ -3,7 +3,6 @@

 Autosave = 0

 DisplayPerfInTitle = 0

-

 # Extended aspect ratio, either 16:9, 16:10, or 18:9. 4:3 means normal aspect ratio.

 # Add ", unchanged_sprites" to avoid changing sprite spawn/die behavior. Without this

 # replays will be incompatible.

@@ -12,6 +11,7 @@

 # Add "extend_y, " right before the aspect radio specifier to display 240 lines instead of 224.

 ExtendedAspectRatio = 4:3

+

 [Graphics]

 # Fullscreen mode (0=windowed, 1=desktop fullscreen, 2=fullscreen w/mode change)

 Fullscreen = 0

@@ -23,6 +23,12 @@

 # Enable this option to remove the sprite limits per scan line

 NoSpriteLimits = 1

+

+# Change the appearance of Link by loading a ZSPR file

+# See all sprites here: https://snesrev.github.io/sprites-gfx/snes/zelda3/link/

+# Download the files with "git clone https://github.com/snesrev/sprites-gfx.git"

+# LinkGraphics = sprites-gfx/snes/zelda3/link/sheets/megaman-x.2.zspr

+

 [Sound]

 EnableAudio = 1