74 lines
1.7 KiB
C++
74 lines
1.7 KiB
C++
/* SDL RWops integration.
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*
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* This file is part of OctaSTD. See COPYING.md for futher information.
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*/
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#ifndef OSTD_EXT_SDL_RWOPS_HH
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#define OSTD_EXT_SDL_RWOPS_HH
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#ifdef OSTD_EXT_SDL_USE_SDL1
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#include <SDL/SDL.h>
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#else
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#include <SDL2/SDL.h>
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#endif
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#include "ostd/types.hh"
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#include "ostd/stream.hh"
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namespace ostd {
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namespace sdl {
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#ifdef OSTD_EXT_SDL_USE_SDL1
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using SDLRWopsOffset = int;
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#else
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using SDLRWopsOffset = int64_t;
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#endif
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inline SDL_RWops *stream_to_rwops(Stream &s) {
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SDL_RWops *rwr = SDL_AllocRW();
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if (!rwr) {
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return nullptr;
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}
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rwr->hidden.unknown.data1 = &s;
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rwr->size = [](SDL_RWops *rw) -> SDLRWopsOffset {
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Stream *is = static_cast<Stream *>(rw->hidden.unknown.data1);
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return static_cast<SDLRWopsOffset>(is->size());
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};
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rwr->seek = [](SDL_RWops *rw, SDLRWopsOffset pos, int whence) ->
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SDLRWopsOffset
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{
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Stream *is = static_cast<Stream *>(rw->hidden.unknown.data1);
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if (!pos && whence == SEEK_CUR) {
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return static_cast<SDLRWopsOffset>(is->tell());
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}
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if (is->seek(((StreamOffset)pos, (StreamSeek)whence)) {
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return static_cast<SDLRWopsOffset>(is->tell());
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}
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return -1;
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};
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rwr->read = [](SDL_RWops *rw, void *buf, size_t size, size_t nb) -> size_t {
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Stream *is = static_cast<Stream *>(rw->hidden.unknown.data1);
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return is->read_bytes(buf, size * nb) / size;
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};
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rwr->write = [](SDL_RWops *rw, const void *buf, size_t size, size_t nb) -> size_t {
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Stream *is = static_cast<Stream *>(rw->hidden.unknown.data1);
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return is->write_bytes(buf, size * nb) / size;
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};
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rwr->close = [](SDL_RWops *) -> int {
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return 0;
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};
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return rwr;
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}
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}
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}
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#endif
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