LibGame  v0.4.0
The LG Game Engine - Copyright (C) 2024-2025 ETMSoftware
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lg_dds_loader.h
1 /*
2  * LibGame - Copyright (C) Emmanuel Thomas-Maurin 2011-2025
3  * All rights reserved
4  */
5 
6 #ifndef LG_DDS_LOADER_H
7 #define LG_DDS_LOADER_H
8 
9 #define DDS_MAGIC_SIZE ((size_t)4)
10 #define DDS_MAGIC_AND_HEADER_SIZE ((size_t)128)
11 
12 /* (From dds.h) */
13 #define DDS_HEADER_FLAGS_TEXTURE 0x00001007 /* DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT | DDSD_CAPS */
14 #define DDS_HEADER_FLAGS_LINEARSIZE 0x00080000 /* DDSD_LINEARSIZE */
15 #define DDS_HEADER_FLAGS_MIPMAP 0x00020000 /* DDSD_MIPMAPCOUNT */
16 
17 /* (From DDSTextureLoader9.cpp) */
18 #define MAKEFOURCC(ch0, ch1, ch2, ch3) \
19  ((uint32_t)(uint8_t)(ch0) | ((uint32_t)(uint8_t)(ch1) << 8) | \
20  ((uint32_t)(uint8_t)(ch2) << 16) | ((uint32_t)(uint8_t)(ch3) << 24 ))
21 
22 typedef struct __attribute__((packed)) {
23  uint32_t size;
24  uint32_t flags;
25  uint32_t sig_4cc; /* "DXT1" or "DXT3" */
26  uint32_t rgb_bitcount;
27  uint32_t r_mask;
28  uint32_t g_mask;
29  uint32_t b_mask;
30  uint32_t a_mask;
31 } DDS_PixelFormat;
32 
33 typedef struct __attribute__((packed)) {
34  uint32_t size; /* 124 */
35  uint32_t flags; /* Always include DDSD_CAPS, DDSD_PIXELFORMAT, DDSD_WIDTH, DDSD_HEIGHT and either DDSD_PITCH or DDSD_LINEARSIZE */
36  uint32_t h; /* h first - duh! */
37  uint32_t w;
38  uint32_t pitch_or_linear_size;
39  uint32_t depth;
40  uint32_t mipmap_count;
41  uint32_t reserved1[11];
42  DDS_PixelFormat pixel_format;
43  uint32_t caps;
44  uint32_t caps2;
45  uint32_t caps3;
46  uint32_t caps4;
47  uint32_t reserved2;
48 } DDS_Header;
49 
50 void *lg_load_dds(const char *, lg_tc_format *, size_t *, int *, int *, int *);
51 
52 #endif /* LG_DDS_LOADER_H */
DDS_PixelFormat
Definition: lg_dds_loader.h:22
DDS_Header
Definition: lg_dds_loader.h:33
lg_load_dds
void * lg_load_dds(const char *path, lg_tc_format *tc_format, size_t *size, int *w, int *h, int *n_mipmaps)
Definition: lg_dds_loader.c:59