NEOERR *ne_load_file (const char *path, char **str) {
return ne_load_file_len (path, str, NULL);
}
NEOERR* mast_dds_load(char *dir, char *name, RendAsset **a)
{
char fname[PATH_MAX], *buf, *pos;
NEOERR *err;
DdsLoadInfo loadInfoDXT1 = {
1, 0, 0, 4, 8, GL_COMPRESSED_RGBA_S3TC_DXT1
};
DdsLoadInfo loadInfoDXT3 = {
1, 0, 0, 4, 16, GL_COMPRESSED_RGBA_S3TC_DXT3
};
DdsLoadInfo loadInfoDXT5 = {
1, 0, 0, 4, 16, GL_COMPRESSED_RGBA_S3TC_DXT5
};
DdsLoadInfo loadInfoBGRA8 = {
0, 0, 0, 1, 4, GL_RGBA8, GL_BGRA, GL_UNSIGNED_BYTE
};
DdsLoadInfo loadInfoBGR8 = {
0, 0, 0, 1, 3, GL_RGB8, GL_BGR, GL_UNSIGNED_BYTE
};
DdsLoadInfo loadInfoBGR5A1 = {
0, 1, 0, 1, 2, GL_RGB5_A1, GL_BGRA, GL_UNSIGNED_SHORT_1_5_5_5_REV
};
DdsLoadInfo loadInfoBGR565 = {
0, 1, 0, 1, 2, GL_RGB5, GL_RGB, GL_UNSIGNED_SHORT_5_6_5
};
DdsLoadInfo loadInfoIndex8 = {
0, 0, 1, 1, 1, GL_RGB8, GL_BGRA, GL_UNSIGNED_BYTE
};
if (dir) snprintf(fname, sizeof(fname), "%s%s", dir, name);
else strncpy(fname, name, sizeof(fname));
TexAsset *tnode = mtex_node_new();
if (!tnode) return nerr_raise(NERR_NOMEM, "alloc texture");
DDS_header hdr;
int x = 0;
int y = 0;
int mipMapCount = 0;
int totallen = 0;
err = ne_load_file_len(fname, &buf, &totallen);
if (err != STATUS_OK) return nerr_pass(err);
glEnable(GL_TEXTURE_2D);
glGenTextures(1, &tnode->tex);
glBindTexture(GL_TEXTURE_2D, tnode->tex);
pos = buf;
memcpy(&hdr, buf, sizeof(hdr));
pos += sizeof(hdr);
if (pos - buf > totallen) return nerr_raise(NERR_ASSERT, "file too short");
if (hdr.dwMagic != DDS_MAGIC || hdr.dwSize != 124 ||
!(hdr.dwFlags & DDSD_PIXELFORMAT) || !(hdr.dwFlags & DDSD_CAPS) )
return nerr_raise(NERR_ASSERT, "%s Does not appear to be a .dds file", fname);
x = hdr.dwWidth;
y = hdr.dwHeight;
if (!is_power_of_two(x)) {
mtc_warn("Texture %s with is %i pixels which is not a power of two!", fname, x);
}
if (!is_power_of_two(y)) {
mtc_warn("Texture %s height is %i pixels which is not a power of two!", fname, y);
}
DdsLoadInfo* li = &loadInfoDXT1;
if (PF_IS_DXT1(hdr.sPixelFormat)) {
li = &loadInfoDXT1;
} else if (PF_IS_DXT3(hdr.sPixelFormat)) {
li = &loadInfoDXT3;
} else if (PF_IS_DXT5(hdr.sPixelFormat)) {
li = &loadInfoDXT5;
} else if (PF_IS_BGRA8(hdr.sPixelFormat)) {
li = &loadInfoBGRA8;
} else if (PF_IS_BGR8(hdr.sPixelFormat)) {
li = &loadInfoBGR8;
} else if (PF_IS_BGR5A1(hdr.sPixelFormat)) {
li = &loadInfoBGR5A1;
} else if (PF_IS_BGR565(hdr.sPixelFormat)) {
li = &loadInfoBGR565;
} else if (PF_IS_INDEX8(hdr.sPixelFormat)) {
li = &loadInfoIndex8;
} else {
return nerr_raise(NERR_ASSERT, "%s: Unknown DDS File format type.", fname);
}
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_FALSE);
mipMapCount = (hdr.dwFlags & DDSD_MIPMAPCOUNT) ? hdr.dwMipMapCount : 1;
int ix, zz;
GLenum cFormat, format;
if (li->compressed) {
size_t size = max(li->divSize, x) / li->divSize *
max(li->divSize, y) / li->divSize * li->blockBytes;
char *data = malloc(size);
if (!data ) {
return nerr_raise(NERR_ASSERT, "%s: not contain any data.", fname);
}
cFormat = li->internalFormat;
format = li->internalFormat;
for( ix = 0; ix < mipMapCount; ++ix ) {
memcpy(data, pos, size);
pos += size;
if (pos - buf > totallen) return nerr_raise(NERR_ASSERT, "file too short");
glCompressedTexImage2D(GL_TEXTURE_2D, ix, li->internalFormat,
x, y, 0, size, data);
x = (x+1)>>1;
y = (y+1)>>1;
size = max(li->divSize, x) / li->divSize *
max(li->divSize, y) / li->divSize * li->blockBytes;
}
free(data);
} else if (li->palette) {
