decompile field_effect.c

1 files changed, 218 insertions, 0 deletions

diff --git a/src/field_effect.c b/src/field_effect.c
new file mode 100644
index 000000000..97301ab50
--- /dev/null
+++ b/src/field_effect.c
@@ -0,0 +1,218 @@
+#include "global.h"
+#include "sprite.h"
+
+typedef bool8 (*FldEffCmd)(u8 **, u32 *);
+
+static u8 sActiveList[32];
+
+extern u8 *gFieldEffectScriptPointers[];
+
+extern FldEffCmd gFieldEffectScriptFuncs[];
+
+void FieldEffectScript_LoadTiles(u8 **script);
+void FieldEffectScript_LoadFadedPalette(u8 **script);
+void FieldEffectScript_LoadPalette(u8 **script);
+void FieldEffectScript_CallNative(u8 **script, u32 *val);
+void FieldEffectFreeGraphicsResources(struct Sprite *sprite);
+void FieldEffectStop(struct Sprite *sprite, u8 id);
+void FieldEffectFreeTilesIfUnused(u16 tileStart);
+void FieldEffectFreePaletteIfUnused(u8 paletteNum);
+void FieldEffectActiveListClear(void);
+void FieldEffectActiveListAdd(u8 id);
+void FieldEffectActiveListRemove(u8 id);
+
+u32 FieldEffectStart(u8 id)
+{
+    u8 *script;
+    u32 val;
+
+    FieldEffectActiveListAdd(id);
+
+    script = gFieldEffectScriptPointers[id];
+
+    while (gFieldEffectScriptFuncs[*script](&script, &val))
+        ;
+
+    return val;
+}
+
+bool8 FieldEffectCmd_loadtiles(u8 **script, u32 *val)
+{
+    (*script)++;
+    FieldEffectScript_LoadTiles(script);
+    return TRUE;
+}
+
+bool8 FieldEffectCmd_loadfadedpal(u8 **script, u32 *val)
+{
+    (*script)++;
+    FieldEffectScript_LoadFadedPalette(script);
+    return TRUE;
+}
+
+bool8 FieldEffectCmd_loadpal(u8 **script, u32 *val)
+{
+    (*script)++;
+    FieldEffectScript_LoadPalette(script);
+    return TRUE;
+}
+
+bool8 FieldEffectCmd_callnative(u8 **script, u32 *val)
+{
+    (*script)++;
+    FieldEffectScript_CallNative(script, val);
+    return TRUE;
+}
+
+bool8 FieldEffectCmd_end(u8 **script, u32 *val)
+{
+    return FALSE;
+}
+
+bool8 FieldEffectCmd_loadgfx_callnative(u8 **script, u32 *val)
+{
+    (*script)++;
+    FieldEffectScript_LoadTiles(script);
+    FieldEffectScript_LoadFadedPalette(script);
+    FieldEffectScript_CallNative(script, val);
+    return TRUE;
+}
+
+bool8 FieldEffectCmd_loadtiles_callnative(u8 **script, u32 *val)
+{
+    (*script)++;
+    FieldEffectScript_LoadTiles(script);
+    FieldEffectScript_CallNative(script, val);
+    return TRUE;
+}
+
+bool8 FieldEffectCmd_loadfadedpal_callnative(u8 **script, u32 *val)
+{
+    (*script)++;
+    FieldEffectScript_LoadFadedPalette(script);
+    FieldEffectScript_CallNative(script, val);
+    return TRUE;
+}
+
+u32 FieldEffectScript_ReadWord(u8 **script)
+{
+    return (*script)[0]
+         + ((*script)[1] << 8)
+         + ((*script)[2] << 16)
+         + ((*script)[3] << 24);
+}
+
+void FieldEffectScript_LoadTiles(u8 **script)
+{
+    struct SpriteSheet *sheet = (struct SpriteSheet *)FieldEffectScript_ReadWord(script);
+    if (GetSpriteTileStartByTag(sheet->tag) == 0xFFFF)
+        LoadSpriteSheet(sheet);
+    (*script) += 4;
+}
+
+void FieldEffectScript_LoadFadedPalette(u8 **script)
+{
+    struct SpritePalette *palette = (struct SpritePalette *)FieldEffectScript_ReadWord(script);
+    LoadSpritePalette(palette);
+    sub_807D78C(IndexOfSpritePaletteTag(palette->tag));
+    (*script) += 4;
+}
+
+void FieldEffectScript_LoadPalette(u8 **script)
+{
+    struct SpritePalette *palette = (struct SpritePalette *)FieldEffectScript_ReadWord(script);
+    LoadSpritePalette(palette);
+    (*script) += 4;
+}
+
+void FieldEffectScript_CallNative(u8 **script, u32 *val)
+{
+    u32 (*func)(void) = (u32 (*)(void))FieldEffectScript_ReadWord(script);
+    *val = func();
+    (*script) += 4;
+}
+
+void FieldEffectFreeGraphicsResources(struct Sprite *sprite)
+{
+    u16 sheetTileStart = sprite->sheetTileStart;
+    u32 paletteNum = sprite->oam.paletteNum;
+    DestroySprite(sprite);
+    FieldEffectFreeTilesIfUnused(sheetTileStart);
+    FieldEffectFreePaletteIfUnused(paletteNum);
+}
+
+void FieldEffectStop(struct Sprite *sprite, u8 id)
+{
+    FieldEffectFreeGraphicsResources(sprite);
+    FieldEffectActiveListRemove(id);
+}
+
+void FieldEffectFreeTilesIfUnused(u16 tileStart)
+{
+    u8 i;
+    u16 tag = GetSpriteTileTagByTileStart(tileStart);
+
+    if (tag != 0xFFFF)
+    {
+        for (i = 0; i < MAX_SPRITES; i++)
+            if (gSprites[i].inUse && gSprites[i].usingSheet && tileStart == gSprites[i].sheetTileStart)
+                return;
+        FreeSpriteTilesByTag(tag);
+    }
+}
+
+void FieldEffectFreePaletteIfUnused(u8 paletteNum)
+{
+    u8 i;
+    u16 tag = GetSpritePaletteTagByPaletteNum(paletteNum);
+
+    if (tag != 0xFFFF)
+    {
+        for (i = 0; i < MAX_SPRITES; i++)
+            if (gSprites[i].inUse && gSprites[i].oam.paletteNum == paletteNum)
+                return;
+        FreeSpritePaletteByTag(tag);
+    }
+}
+
+void FieldEffectActiveListClear(void)
+{
+    u8 i;
+    for (i = 0; i < ARRAY_COUNT(sActiveList); i++)
+        sActiveList[i] = 0xFF;
+}
+
+void FieldEffectActiveListAdd(u8 id)
+{
+    u8 i;
+    for (i = 0; i < ARRAY_COUNT(sActiveList); i++)
+    {
+        if (sActiveList[i] == 0xFF)
+        {
+            sActiveList[i] = id;
+            return;
+        }
+    }
+}
+
+void FieldEffectActiveListRemove(u8 id)
+{
+    u8 i;
+    for (i = 0; i < ARRAY_COUNT(sActiveList); i++)
+    {
+        if (sActiveList[i] == id)
+        {
+            sActiveList[i] = 0xFF;
+            return;
+        }
+    }
+}
+
+bool8 FieldEffectActiveListContains(u8 id)
+{
+    u8 i;
+    for (i = 0; i < ARRAY_COUNT(sActiveList); i++)
+        if (sActiveList[i] == id)
+            return TRUE;
+    return FALSE;
+}