Dan Bagnell
68 lines
2.7 KiB
C++
68 lines
2.7 KiB
C++
#define PLATFORM_NACL
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#include <stddef.h> // For NULL, size_t
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#include <cstring> // for malloc etc
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#include "crn_decomp.h"
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extern "C" {
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unsigned int crn_get_width(void *src, unsigned int src_size);
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unsigned int crn_get_height(void *src, unsigned int src_size);
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unsigned int crn_get_levels(void *src, unsigned int src_size);
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unsigned int crn_get_dxt_format(void *src, unsigned int src_size);
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unsigned int crn_get_uncompressed_size(void *p, unsigned int size);
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void crn_decompress(void *src, unsigned int src_size, void *dst, unsigned int dst_size);
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}
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unsigned int crn_get_width(void *src, unsigned int src_size) {
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crnd::crn_texture_info tex_info;
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crnd::crnd_get_texture_info(static_cast<crn_uint8*>(src), src_size, &tex_info);
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return tex_info.m_width;
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}
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unsigned int crn_get_height(void *src, unsigned int src_size) {
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crnd::crn_texture_info tex_info;
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crnd::crnd_get_texture_info(static_cast<crn_uint8*>(src), src_size, &tex_info);
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return tex_info.m_height;
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}
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unsigned int crn_get_levels(void *src, unsigned int src_size) {
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crnd::crn_texture_info tex_info;
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crnd::crnd_get_texture_info(static_cast<crn_uint8*>(src), src_size, &tex_info);
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return tex_info.m_levels;
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}
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unsigned int crn_get_dxt_format(void *src, unsigned int src_size) {
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crnd::crn_texture_info tex_info;
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crnd::crnd_get_texture_info(static_cast<crn_uint8*>(src), src_size, &tex_info);
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return tex_info.m_format;
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}
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unsigned int crn_get_uncompressed_size(void *src, unsigned int src_size) {
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crnd::crn_texture_info tex_info;
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crnd::crnd_get_texture_info(static_cast<crn_uint8*>(src), src_size, &tex_info);
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const crn_uint32 width = tex_info.m_width;
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const crn_uint32 height = tex_info.m_height;
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const crn_uint32 blocks_x = (width + 3) >> 2;
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const crn_uint32 blocks_y = (height + 3) >> 2;
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const crn_uint32 row_pitch = blocks_x * crnd::crnd_get_bytes_per_dxt_block(tex_info.m_format);
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const crn_uint32 total_face_size = row_pitch * blocks_y;
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return total_face_size;
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}
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void crn_decompress(void *src, unsigned int src_size, void *dst, unsigned int dst_size) {
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crnd::crn_texture_info tex_info;
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crnd::crnd_get_texture_info(static_cast<crn_uint8*>(src), src_size, &tex_info);
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const crn_uint32 width = tex_info.m_width;
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const crn_uint32 height = tex_info.m_height;
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const crn_uint32 blocks_x = (width + 3) >> 2;
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const crn_uint32 blocks_y = (height + 3) >> 2;
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const crn_uint32 row_pitch = blocks_x * crnd::crnd_get_bytes_per_dxt_block(tex_info.m_format);
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crnd::crnd_unpack_context pContext =
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crnd::crnd_unpack_begin(static_cast<crn_uint8*>(src), src_size);
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void *pDecomp_images[1];
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pDecomp_images[0] = dst;
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crnd::crnd_unpack_level(pContext, pDecomp_images, dst_size, row_pitch, 0);
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crnd::crnd_unpack_end(pContext);
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} |