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+#include <bpre.h>
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+
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+enum time_type {
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+ DAY,
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+ NIGHT
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+};
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+
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+enum map_type {
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+ UNK_00,
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+ VILLAGE,
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+ CITY,
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+ ROUTE,
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+ CELLAR,
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+ UNDERWATER,
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+ UNK_07,
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+ UNK_08,
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+ INSIDE,
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+ SECRET_BASE
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+};
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+
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+struct mapdata_header {
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+ u32 width;
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+ u32 height;
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+ void* border;
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+ void* data;
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+ void* blockset_one;
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+ void* blockset_two;
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+ u8 border_width;
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+ u8 border_height;
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+ u16 unknown;
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+};
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+
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+struct mapheader {
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+ struct mapdata_header* data_header;
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+ void* events;
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+ void* scripts;
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+ void* connections;
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+ u16 music;
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+ u16 mapindex;
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+ u8 name;
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+ u8 cave;
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+ u8 weather;
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+ enum map_type maptype;
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+ u8 field18;
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+ u8 escape_rope;
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+ u8 showname;
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+ u8 battletype;
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+};
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+
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+extern struct mapheader current_mapheader;
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+
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+struct color_shade {
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+ struct color color;
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+ u8 alpha;
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+};
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+
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+struct npc_palette {
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+ struct color* palette;
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+ u16 tag;
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+ u16 fill;
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+};
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+
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+struct pal_replace {
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+ void* blockset;
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+ u8 pal;
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+ u8 index;
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+ struct color color;
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+};
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+
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+extern struct npc_palette* npc_palettes;
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+extern volatile u8 tint_filter;
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+void apply_shaders(u8 pal, u8 fade_copy);
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+struct color alpha_blend(struct color a, struct color b, u8 alpha);
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+extern void blockset_load_palette_to_gpu(void* blockset, u16 start, u16 len);
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+extern void gpu_pal_apply(struct color* src, u16 dst, u16 len);
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+extern void tint_palette(u8 pal_slot);
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+extern u8 gpu_pal_tags_index_of(u16 pal_tag);
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+void copy_unfaded(u8 slot);
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+u8 is_current_map_dn_valid(enum map_type current_type);
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+//care, this has to be manually patched to be u16
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+extern u16 npc_pal_idx_for_given_tag(u16 tag);
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+struct color_shade get_color_from_time(enum time_type current_time);
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+enum time_type get_time_of_day();
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+void apply_lighting(void* blockset, u8 copy);
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+
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+enum time_type get_time_of_day() {
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+ return NIGHT;
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+}
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+
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+static struct pal_replace lightmap[] = {
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+ {(void*) 0x082D4AAC, 9, 10, {31, 31, 0}},
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+ {(void*) 0x082D4AAC, 9, 9, {31, 31, 0}},
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+ {(void*) 0x082D4AAC, 9, 8, {31, 31, 0}}
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+};
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+
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+static struct color_shade color_shade_day = {
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+ {0, 0, 0}, 255
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+};
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+static struct color_shade color_shade_night = {
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+ {0, 6, 16}, 120
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+};
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+
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+void mapdata_load_palette_two(struct mapdata_header* data_header) {
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+ blockset_load_palette_to_gpu(data_header->blockset_two, 0x70, 0xC0);
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+ for (u8 i = 7; i < 7 + 6; ++i)
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+ apply_shaders(i, 0);
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+ apply_lighting(data_header->blockset_two, 0);
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+ return;
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+}
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+
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+void mapdata_load_palette_one(struct mapdata_header* data_header) {
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+ blockset_load_palette_to_gpu(data_header->blockset_one, 0x0, 0xE0);
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+ for (u8 i = 0; i < 7; ++i)
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+ apply_shaders(i, 0);
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+ apply_lighting(data_header->blockset_one, 0);
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+ return;
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+}
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+
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+void apply_lighting(void* blockset, u8 copy)
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+{
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+ for (int i = 0; i < (sizeof (lightmap) / sizeof (lightmap[0])); ++i) {
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+ if (blockset == lightmap[i].blockset) {
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+ palette_unfaded_buffer[lightmap[i].pal * 16 + lightmap[i].index] = lightmap[i].color;
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+ }
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+ }
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+ return;
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+}
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+
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+void apply_shaders(u8 pal, u8 fade_copy) {
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+ if (tint_filter != 0)
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+ return;
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+ if (!is_current_map_dn_valid(current_mapheader.maptype))
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+ return;
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+ for (int i = pal * 16; i < (pal * 16) + 16; ++i) {
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+ struct color_shade current_shade = get_color_from_time(get_time_of_day());
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+ palette_unfaded_buffer[i] = alpha_blend(palette_unfaded_buffer[i], current_shade.color, current_shade.alpha);
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+ }
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+ if (fade_copy)
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+ copy_unfaded(pal);
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+}
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+
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+void copy_unfaded(u8 slot) {
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+ for (int i = slot * 16; i < (slot * 16) + 16; ++i) {
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+ palette_faded_buffer[i] = palette_unfaded_buffer[i];
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+ }
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+}
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+
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+u8 is_current_map_dn_valid(enum map_type current_type) {
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+ switch (current_type) {
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+ case VILLAGE:
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+ case CITY:
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+ case ROUTE:
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+ return 1;
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+ default:
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+ return 0;
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+ }
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+ return 0;
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+}
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+
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+struct color_shade get_color_from_time(enum time_type current_time) {
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+ switch (current_time) {
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+ case NIGHT:
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+ return color_shade_night;
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+ case DAY:
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+ default:
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+ return color_shade_day;
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+ }
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+}
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+
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+struct color alpha_blend(struct color a, struct color b, u8 alpha) {
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+ if (alpha == 255)
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+ return a;
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+ if (alpha == 0)
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+ return b;
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+ struct color output;
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+ u8 inverted_alpha = 255 - alpha;
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+
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+ output.r = ((a.r * alpha + b.r * inverted_alpha) / 255);
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+ output.b = ((a.b * alpha + b.b * inverted_alpha) / 255);
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+ output.g = ((a.g * alpha + b.g * inverted_alpha) / 255);
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+ return output;
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+}
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+
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+void pal_patch_for_npc(u16 tag, u8 pal_slot) {
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+ u16 npc_map_entry = npc_pal_idx_for_given_tag(tag);
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+ gpu_pal_apply(npc_palettes[npc_map_entry].palette, (pal_slot + 16) * 16, 32);
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+ tint_palette(pal_slot);
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+ apply_shaders(pal_slot + 16, 1);
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+}
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+/*use fade in animation, load palettes according to current fade state*/
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SBird1337
8 anni fa