mirror of https://github.com/nmlgc/ReC98.git
88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/// Uncompressed, 5-plane, 16-color + alpha, arbitrary-size sprite format
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/// ---------------------------------------------------------------------
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#define BOS_MAGIC "BOSS"
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// On-disk per-file header. Not the same as for .GRC!
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struct bos_header_t {
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char magic[sizeof(BOS_MAGIC) - 1];
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// Yes, this means that the *format* itself isn't actually restricted to
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// word-aligned / 16w×h sizes, …
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uint8_t vram_w;
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int8_t zero;
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uint8_t h;
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int8_t unknown;
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spriteformat_header_inner_t inner;
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};
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#define BOS_IMAGES_PER_SLOT 8
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// In-memory slot structures
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struct bos_image_t {
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// … as these types would suggest. That's purely an implementation choice.
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Planar<dots16_t *> planes;
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dots16_t *alpha;
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};
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struct bos_t {
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bos_image_t image[BOS_IMAGES_PER_SLOT];
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};
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// Shared loading and freeing subfunctions
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// ---------------------------------------
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// Separate function to work around the `Condition is always true/false` and
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// `Unreachable code` warnings
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inline void bos_header_load_palette(Palette4 &pal, bool load) {
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if(load) {
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arc_file_get_far(pal);
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} else {
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arc_file_seek(sizeof(spriteformat_header_t<bos_header_t>));
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}
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}
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#define bos_header_load(that, plane_size, fn, needlessly_load_the_palette) \
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union { \
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bos_header_t outer; \
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Palette4 pal; \
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int8_t space[50]; \
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} header; \
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\
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arc_file_load(fn); \
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\
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arc_file_get_far(header.outer); \
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that->vram_w = header.outer.vram_w; \
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that->h = header.outer.h; \
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that->bos_image_count = header.outer.inner.image_count; \
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plane_size = (that->vram_w * that->h); \
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bos_header_load_palette(header.pal, needlessly_load_the_palette);
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#define bos_image_new(image, plane_size) \
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image.alpha = new dots16_t[plane_size / 2]; \
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image.planes.B = new dots16_t[plane_size / 2]; \
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image.planes.R = new dots16_t[plane_size / 2]; \
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image.planes.G = new dots16_t[plane_size / 2]; \
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image.planes.E = new dots16_t[plane_size / 2];
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// Always setting the pointer to NULL, for a change...
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#define bos_image_ptr_free(ptr) \
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if(ptr) { \
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delete[] ptr; \
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} \
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ptr = NULL;
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#define bos_free(slot_ptr) \
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for(int image = 0; image < BOS_IMAGES_PER_SLOT; image++) { \
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bos_image_ptr_free(slot_ptr.image[image].alpha); \
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bos_image_ptr_free(slot_ptr.image[image].planes.B); \
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bos_image_ptr_free(slot_ptr.image[image].planes.R); \
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bos_image_ptr_free(slot_ptr.image[image].planes.G); \
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bos_image_ptr_free(slot_ptr.image[image].planes.E); \
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}
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// ---------------------------------------
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/// All functions that operate on this format are implemented redundantly for
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/// both CBossEntity and CBossAnim, with their own respective entity arrays.
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/// ---------------------------------------------------------------------
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