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40 lines
879 B
40 lines
879 B
#include "common.h"
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#include "memory.h"
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#define PRIMBUFLEN 131072 // TODO: optimize this for a typical scene
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static char primbuff[2][PRIMBUFLEN]; // Primitive buffer, just a raw buffer of bytes to use as a pool for primitives
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static char *nextpri;
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static char *primbuff_bounds;
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char* const scratchpad = (char*)0x1F800000;
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void *mem_scratch(char **scratch_offset, unsigned short size)
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{
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#if _DEBUG
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if (*scratch_offset + size > scratchpad + 1024)
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return NULL;
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#endif
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void *result = *scratch_offset;
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*scratch_offset += size;
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return result;
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}
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void mem_prim_reset(int db)
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{
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nextpri = primbuff[db];
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primbuff_bounds = nextpri + PRIMBUFLEN;
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}
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void *mem_prim(size_t size)
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{
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#if _DEBUG
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if (nextpri + size > primbuff_bounds)
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return NULL; // TODO: report error
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#endif
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void *prim = nextpri;
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nextpri += size;
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return prim;
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}
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