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ReC98/th01/formats/grc.hpp

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[Reverse-engineering] [th01] .GRC: Slot structure Part of P0105, funded by Yanga.
2020-07-29 18:09:12 +00:00
/// Uncompressed monochrome 8w×h sprite format
/// ------------------------------------------
[Decompilation] [th01] .GRC: Load function Still no idea what those 7 unknown bytes in the .GRC and .BOS headers could be. Part of P0105, funded by Yanga.
2020-07-30 18:46:00 +00:00
#include "th01/formats/sprfmt_h.hpp"
#define GRC_MAGIC "GRCG"
// On-disk per-file header. Not the same as for .BOS!
struct grc_header_t {
char magic[sizeof(GRC_MAGIC) - 1];
int16_t vram_w;
int16_t h;
spriteformat_header_inner_t inner;
};
[Reverse-engineering] [th01] .GRC: Slot structure Part of P0105, funded by Yanga.
2020-07-29 18:09:12 +00:00
static const int GRC_SLOT_COUNT = 8;
static const int GRC_IMAGES_PER_SLOT = 8;
// In-memory slot structure
struct grc_t {
[Maintenance] Declare distinct types for pixel and VRAM sizes Oh wait, we also need one of those for an upcoming structure! Part of P0111, funded by [Anonymous] and Blue Bolt.
2020-08-21 18:13:08 +00:00
vram_byte_amount_t vram_w;
pixel_t h;
[Reverse-engineering] [th01] .GRC: Slot structure Part of P0105, funded by Yanga.
2020-07-29 18:09:12 +00:00
int image_count;
dots8_t* dots[GRC_IMAGES_PER_SLOT];
};
extern grc_t grc_images[GRC_SLOT_COUNT];
[Decompilation] [th01] .GRC: Load function Still no idea what those 7 unknown bytes in the .GRC and .BOS headers could be. Part of P0105, funded by Yanga.
2020-07-30 18:46:00 +00:00
// Loads all images from the .GRC file with the given [fn] inside the
// currently active packfile into the given .GRC [slot]. Always returns 0.
int grc_load(int slot, const char fn[PF_FN_LEN]);
[Decompilation] [th01] .GRC: Byte-aligned blitting And that's all? No unblitting or non-aligned functions? Oh well, at least this one correctly clips the sprite at all 4 edges of VRAM, for once. Part of P0105, funded by Yanga.
2020-07-31 19:09:50 +00:00
[Decompilation] [th01] .GRC: Freeing images in a single slot Part of P0105, funded by Yanga.
2020-08-01 09:58:16 +00:00
// Frees all images in the given [slot].
void grc_free(int slot);
[Decompilation] [th01] .GRC: Byte-aligned blitting And that's all? No unblitting or non-aligned functions? Oh well, at least this one correctly clips the sprite at all 4 edges of VRAM, for once. Part of P0105, funded by Yanga.
2020-07-31 19:09:50 +00:00
// Blits the sub[image] from the given [slot] to (⌊left/8⌋*8, top) with the
// given [col]. Correctly clips the sprite at all 4 edges of VRAM.
[Maintenance] Declare distinct types for screen, VRAM, and TRAM coordinates Whew, time to look at every `int` variable we ever declared! The best moment to do this would have been a year ago, but well, better late than never. No need to communicate that in comments anymore. These shouldn't be used for widths, heights, or sprite-space coordinates. Maybe we'll cover that another time, this commit is already large enough. Part of P0111, funded by [Anonymous] and Blue Bolt.
2020-08-20 19:59:45 +00:00
void grc_put_8(screen_x_t left, vram_y_t top, int slot, int image, int col);
[Reverse-engineering] [th01] .GRC: Slot structure Part of P0105, funded by Yanga.
2020-07-29 18:09:12 +00:00
/// ------------------------------------------