buffers.c

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#include "internal.h"
 
#define BUFFER_BASE_PADDR 0x18000000
 
void BufInfo_Init(C3D_BufInfo* info)
{
    memset(info, 0, sizeof(*info));
    info->base_paddr = BUFFER_BASE_PADDR;
}
 
int BufInfo_Add(C3D_BufInfo* info, const void* data, ptrdiff_t stride, int attribCount, u64 permutation)
{
    if (info->bufCount == 12) return -1;
    int id = info->bufCount++;
 
    u32 pa = osConvertVirtToPhys(data);
    if (pa < info->base_paddr) return -2;
 
    C3D_BufCfg* buf = &info->buffers[id];
    buf->offset = pa - info->base_paddr;
    buf->flags[0] = permutation & 0xFFFFFFFF;
    buf->flags[1] = (permutation >> 32) | (stride << 16) | (attribCount << 28);
    return id;
}
 
C3D_BufInfo* C3D_GetBufInfo(void)
{
    C3D_Context* ctx = C3Di_GetContext();
 
    if (!(ctx->flags & C3DiF_Active))
        return NULL;
 
    ctx->flags |= C3DiF_BufInfo;
    return &ctx->bufInfo;
}
 
void C3D_SetBufInfo(C3D_BufInfo* info)
{
    C3D_Context* ctx = C3Di_GetContext();
 
    if (!(ctx->flags & C3DiF_Active))
        return;
 
    if (info != &ctx->bufInfo)
        memcpy(&ctx->bufInfo, info, sizeof(*info));
    ctx->flags |= C3DiF_BufInfo;
}
 
void C3Di_BufInfoBind(C3D_BufInfo* info)
{
    GPUCMD_AddWrite(GPUREG_ATTRIBBUFFERS_LOC, info->base_paddr >> 3);
    GPUCMD_AddIncrementalWrites(GPUREG_ATTRIBBUFFER0_OFFSET, (u32*)info->buffers, sizeof(info->buffers)/sizeof(u32));
}