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small dds optimization

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This commit is contained in:
David Rose 2008-08-21 01:21:38 +00:00
parent cd69554707
commit 481e53fd77
1 changed files with 26 additions and 39 deletions
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65
panda/src/gobj/texture.cxx
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@ -3652,16 +3652,8 @@ read_dds_level_bgr8(Texture *tex, const DDSHeader &header,
PTA_uchar image = PTA_uchar::empty_array(size);
for (int y = y_size - 1; y >= 0; --y) {
unsigned char *p = image.p() + y * row_bytes;
for (int x = 0; x < x_size; ++x) {
unsigned int b = (unsigned char)in.get();
unsigned int g = (unsigned char)in.get();
unsigned int r = (unsigned char)in.get();
store_unscaled_byte(p, b);
store_unscaled_byte(p, g);
store_unscaled_byte(p, r);
}
nassertr(p <= image.p() + size, false);
nassertr(p + row_bytes <= image.p() + size, false);
in.read((char *)p, row_bytes);
}
tex->set_ram_mipmap_image(n, image);
@ -3686,14 +3678,15 @@ read_dds_level_rgb8(Texture *tex, const DDSHeader &header,
PTA_uchar image = PTA_uchar::empty_array(size);
for (int y = y_size - 1; y >= 0; --y) {
unsigned char *p = image.p() + y * row_bytes;
for (int x = 0; x < x_size; ++x) {
unsigned int r = (unsigned char)in.get();
unsigned int g = (unsigned char)in.get();
unsigned int b = (unsigned char)in.get();
nassertr(p + row_bytes <= image.p() + size, false);
in.read((char *)p, row_bytes);
store_unscaled_byte(p, b);
store_unscaled_byte(p, g);
store_unscaled_byte(p, r);
// Now reverse the r, g, b triples.
for (int x = 0; x < x_size; ++x) {
unsigned char r = p[0];
p[0] = p[2];
p[2] = r;
p += 3;
}
nassertr(p <= image.p() + size, false);
}
@ -3720,18 +3713,22 @@ read_dds_level_abgr8(Texture *tex, const DDSHeader &header,
PTA_uchar image = PTA_uchar::empty_array(size);
for (int y = y_size - 1; y >= 0; --y) {
unsigned char *p = image.p() + y * row_bytes;
for (int x = 0; x < x_size; ++x) {
unsigned int r = (unsigned char)in.get();
unsigned int g = (unsigned char)in.get();
unsigned int b = (unsigned char)in.get();
unsigned int a = (unsigned char)in.get();
in.read((char *)p, row_bytes);
store_unscaled_byte(p, b);
store_unscaled_byte(p, g);
store_unscaled_byte(p, r);
store_unscaled_byte(p, a);
PN_uint32 *pw = (PN_uint32 *)p;
for (int x = 0; x < x_size; ++x) {
PN_uint32 w = *pw;
#ifdef WORDS_BIGENDIAN
// bigendian: convert R, G, B, A to B, G, R, A.
w = ((w & 0xff00) << 16) | ((w & 0xff000000U) >> 16) | (w & 0xff00ff);
#else
// littendian: convert A, B, G, R to to A, R, G, B.
w = ((w & 0xff) << 16) | ((w & 0xff0000) >> 16) | (w & 0xff00ff00U);
#endif
*pw = w;
++pw;
}
nassertr(p <= image.p() + size, false);
nassertr((unsigned char *)pw <= image.p() + size, false);
}
tex->set_ram_mipmap_image(n, image);
@ -3756,18 +3753,8 @@ read_dds_level_rgba8(Texture *tex, const DDSHeader &header,
PTA_uchar image = PTA_uchar::empty_array(size);
for (int y = y_size - 1; y >= 0; --y) {
unsigned char *p = image.p() + y * row_bytes;
for (int x = 0; x < x_size; ++x) {
unsigned int b = (unsigned char)in.get();
unsigned int g = (unsigned char)in.get();
unsigned int r = (unsigned char)in.get();
unsigned int a = (unsigned char)in.get();
store_unscaled_byte(p, b);
store_unscaled_byte(p, g);
store_unscaled_byte(p, r);
store_unscaled_byte(p, a);
}
nassertr(p <= image.p() + size, false);
nassertr(p + row_bytes <= image.p() + size, false);
in.read((char *)p, row_bytes);
}
tex->set_ram_mipmap_image(n, image);