/*
 * PSP Software Development Kit - https://github.com/pspdev
 * -----------------------------------------------------------------------
 * Licensed under the BSD license, see LICENSE in PSPSDK root for details.
 *
 * Copyright (c) 2005 Jesper Svennevid
 */

#include "guInternal.h"

void sceGuDepthRange(int near, int far)
{
#ifdef GU_DEBUG
	printf("sceGuDepthRange(%d, %d);\n", near, far);
	assert(gu_init && "GU not initialized");
	assert(near >= 0 && near <= 65535 && "Invalid near plane");
	assert(far >= 0 && far <= 65535 && "Invalid far plane");
#endif

        GuContext *context = &gu_contexts[gu_curr_context];

        unsigned int max = (unsigned int)near + (unsigned int)far;
        int val = (int)((max >> 31) + max);
        float z = (float)(val >> 1);

        context->near_plane = near;
        context->far_plane = far;

        sendCommandf(VIEWPORT_Z_SCALE, z - ((float)near));
        sendCommandf(VIEWPORT_Z_CENTER, z + ((float)context->depth_offset));

        if (near > far)
        {
                int temp = near;
                near = far;
                far = temp;
        }

        sendCommandi(MIN_Z, near);
        sendCommandi(MAX_Z, far);
}