gistfile1.cpp

static int update_attrib_format(struct gl_vertex_array_object* vao)
{
	int x, index = 0;
	struct gl_vertex_attrib_array* attrib;
	for (x = 0; x < VERT_ATTRIB_MAX; ++x) {
		attrib = &vao->VertexAttrib[x];
		if (attrib->Enabled) {
			vao->AttributeFormats |= GPU_ATTRIBFMT(index, attrib->Size, attrib->Type);
//			vao->AttributeFormats |= ((attrib->Size-1 << 2) | attrib->Type) << (index * 4);
			vao->AttributePermutation |= index << (index * 4);

			vao->BufferOffsets[index] = attrib->Ptr - __linear_heap;
			vao->BufferPermutations[index] = index;// << (index * 4);
			index++;
		}
	}
	return index;
}

void glDrawArrays(GLenum mode, GLint first, GLsizei count)
{
	GET_CURRENT_CONTEXT(ctx);
	update_context(ctx);

	int i = 0;
	u8 sizeTable[0xC];

//	uint64_t attributeFormats = 0;
	uint16_t attributeMask = 0xFF8; //0xFFF << 3;
//	uint64_t attributePermutation = 0;

//	uint32_t bufferOffsets[1];
//	uint64_t bufferPermutations[1];
//	uint8_t bufferNumAttributes[1];

	struct gl_vertex_array_object* vao = ctx->Array.VAO;
	unsigned char attrib_count = update_attrib_format(vao);
	printf(" count:%d ", attrib_count);

	int numBuffers = 3; // hardcode buffer count for testing

	u32 param[28];

	memset(param, 0x00, 28*4);

	param[0x0]=(osConvertVirtToPhys(__linear_heap))>>3;
	param[0x1]=vao->AttributeFormats&0xFFFFFFFF;
	param[0x2]=((attrib_count-1)<<28)|((attributeMask&0xFFF)<<16)|((vao->AttributeFormats>>32)&0xFFFF);

	int j;
	u8  bufferNumAttributes[] = {1, 1, 1};
	const u8 GPU_FORMATSIZE[4]={1,1,2,4};

	for(i=0;i<attrib_count;i++)
	{
		u8 v=vao->AttributeFormats&0xF;
		sizeTable[i]=GPU_FORMATSIZE[v&3]*((v>>2)+1);
		vao->AttributeFormats>>=4;
	}

	for(i=0;i<numBuffers;i++)
	{
		u16 stride=20;
		param[3*(i+1)+0]=vao->BufferOffsets[i];
		param[3*(i+1)+1]=vao->BufferPermutations[i]&0xFFFFFFFF;
//		for(j=0;j<bufferNumAttributes[i];j++)stride+=sizeTable[(vao->BufferPermutations[i]>>(4*j))&0xF];
		printf("stride%d:%d", i, stride);
		param[3*(i+1)+2]=(bufferNumAttributes[i]<<28)|((stride&0xFFF)<<16)|((vao->BufferPermutations[i]>>32)&0xFFFF);
	}

	GPUCMD_AddIncrementalWrites(GPUREG_ATTRIBBUFFERS_LOC, param, 28);

	GPUCMD_AddMaskedWrite(GPUREG_VSH_INPUTBUFFER_CONFIG, 0xB, 0xA0000000|(attrib_count-1));
	GPUCMD_AddWrite(GPUREG_0242, (attrib_count-1));

	GPUCMD_AddIncrementalWrites(GPUREG_VSH_ATTRIBUTES_PERMUTATION_LOW, ((u32[]){vao->AttributePermutation&0xFFFFFFFF, (vao->AttributePermutation>>32)&0xFFFF}), 2);

    GPU_DrawArray((GPU_Primitive_t)mode, count);
}