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dquakeplus/source/psp/gu/gu_resample.cpp

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#include <pspgu.h>
extern "C"
{
#include "../../quakedef.h"
}
#define LERPBYTE(i) r = row1[i]; out[i] = (byte) ((((row2[i] - r) * lerp) >> 16) + r)
#define NOLERPBYTE(i) *out++ = inrow[f + i]
/*
================
Image_Resample32LerpLine
================
*/
static void Image_Resample32LerpLine (byte *in, byte *out, int inwidth, int outwidth)
{
int j, xi, oldx = 0, f, fstep, endx, lerp;
fstep = (int) (inwidth * 65536.0f / outwidth);
endx = (inwidth - 1);
for (j = 0, f = 0; j < outwidth; j++, f += fstep) {
xi = (int) f >> 16;
if (xi != oldx) {
in += (xi - oldx) * 4;
oldx = xi;
}
if (xi < endx) {
lerp = f & 0xFFFF;
*out++ = (byte) ((((in[4] - in[0]) * lerp) >> 16) + in[0]);
*out++ = (byte) ((((in[5] - in[1]) * lerp) >> 16) + in[1]);
*out++ = (byte) ((((in[6] - in[2]) * lerp) >> 16) + in[2]);
*out++ = (byte) ((((in[7] - in[3]) * lerp) >> 16) + in[3]);
} else {
*out++ = in[0];
*out++ = in[1];
*out++ = in[2];
*out++ = in[3];
}
}
}
/*
================
Image_Resample32
================
*/
static void Image_Resample32 (void *indata, int inwidth, int inheight,void *outdata, int outwidth, int outheight, int quality)
{
if (quality)
{
int i, j, r, yi, oldy, f, fstep, endy = (inheight - 1), lerp;
int inwidth4 = inwidth * 4, outwidth4 = outwidth * 4;
byte *inrow, *out, *row1, *row2, *memalloc;
out = static_cast<byte*>(outdata);
fstep = (int) (inheight * 65536.0f / outheight);
memalloc = static_cast<byte*>(Q_malloc(2 * outwidth4));
row1 = memalloc;
row2 = memalloc + outwidth4;
inrow = (byte *) indata;
oldy = 0;
Image_Resample32LerpLine (inrow, row1, inwidth, outwidth);
Image_Resample32LerpLine (inrow + inwidth4, row2, inwidth, outwidth);
for (i = 0, f = 0; i < outheight; i++, f += fstep)
{
yi = f >> 16;
if (yi < endy)
{
lerp = f & 0xFFFF;
if (yi != oldy)
{
inrow = (byte *) indata + inwidth4 * yi;
if (yi == oldy + 1)
memcpy_vfpu(row1, row2, outwidth4);
else
Image_Resample32LerpLine (inrow, row1, inwidth, outwidth);
Image_Resample32LerpLine (inrow + inwidth4, row2, inwidth, outwidth);
oldy = yi;
}
j = outwidth - 4;
while(j >= 0)
{
LERPBYTE(0); LERPBYTE(1); LERPBYTE(2); LERPBYTE(3);
LERPBYTE(4); LERPBYTE(5); LERPBYTE(6); LERPBYTE(7);
LERPBYTE(8); LERPBYTE(9); LERPBYTE(10); LERPBYTE(11);
LERPBYTE(12); LERPBYTE(13); LERPBYTE(14); LERPBYTE(15);
out += 16;
row1 += 16;
row2 += 16;
j -= 4;
}
if (j & 2)
{
LERPBYTE(0); LERPBYTE(1); LERPBYTE(2); LERPBYTE(3);
LERPBYTE(4); LERPBYTE(5); LERPBYTE(6); LERPBYTE(7);
out += 8;
row1 += 8;
row2 += 8;
}
if (j & 1)
{
LERPBYTE(0); LERPBYTE(1); LERPBYTE(2); LERPBYTE(3);
out += 4;
row1 += 4;
row2 += 4;
}
row1 -= outwidth4;
row2 -= outwidth4;
}
else
{
if (yi != oldy)
{
inrow = (byte *) indata + inwidth4 * yi;
if (yi == oldy+1)
memcpy_vfpu(row1, row2, outwidth4);
else
Image_Resample32LerpLine (inrow, row1, inwidth, outwidth);
oldy = yi;
}
memcpy_vfpu(out, row1, outwidth4);
}
}
free(memalloc);
}
else
{
int i, j;
unsigned int frac, fracstep, *inrow, *out;
out = static_cast<unsigned int*>(outdata);
fracstep = inwidth * 0x10000 / outwidth;
for (i = 0; i < outheight; i++) {
inrow = (unsigned int*)((int *)indata + inwidth * (i * inheight / outheight));
frac = fracstep >> 1;
j = outwidth - 4;
while (j >= 0)
{
out[0] = inrow[frac >> 16]; frac += fracstep;
out[1] = inrow[frac >> 16]; frac += fracstep;
out[2] = inrow[frac >> 16]; frac += fracstep;
out[3] = inrow[frac >> 16]; frac += fracstep;
out += 4;
j -= 4;
}
if (j & 2)
{
out[0] = inrow[frac >> 16]; frac += fracstep;
out[1] = inrow[frac >> 16]; frac += fracstep;
out += 2;
}
if (j & 1)
{
out[0] = inrow[frac >> 16]; frac += fracstep;
out += 1;
}
}
}
}
/*
================
Image_Resample24LerpLine
================
*/
static void Image_Resample24LerpLine (byte *in, byte *out, int inwidth, int outwidth) {
int j, xi, oldx = 0, f, fstep, endx, lerp;
fstep = (int) (inwidth * 65536.0f / outwidth);
endx = (inwidth - 1);
for (j = 0, f = 0; j < outwidth; j++, f += fstep) {
xi = (int) f >> 16;
if (xi != oldx) {
in += (xi - oldx) * 3;
oldx = xi;
}
if (xi < endx) {
lerp = f & 0xFFFF;
*out++ = (byte) ((((in[3] - in[0]) * lerp) >> 16) + in[0]);
*out++ = (byte) ((((in[4] - in[1]) * lerp) >> 16) + in[1]);
*out++ = (byte) ((((in[5] - in[2]) * lerp) >> 16) + in[2]);
} else {
*out++ = in[0];
*out++ = in[1];
*out++ = in[2];
}
}
}
/*
================
Image_Resample24
================
*/
static void Image_Resample24 (void *indata, int inwidth, int inheight,
void *outdata, int outwidth, int outheight, int quality) {
if (quality) {
int i, j, r, yi, oldy, f, fstep, endy = (inheight - 1), lerp;
int inwidth3 = inwidth * 3, outwidth3 = outwidth * 3;
byte *inrow, *out, *row1, *row2, *memalloc;
out = static_cast<byte*>(outdata);
fstep = (int) (inheight * 65536.0f / outheight);
memalloc = static_cast<byte*>(Q_malloc(2 * outwidth3));
row1 = memalloc;
row2 = memalloc + outwidth3;
inrow = (byte *) indata;
oldy = 0;
Image_Resample24LerpLine (inrow, row1, inwidth, outwidth);
Image_Resample24LerpLine (inrow + inwidth3, row2, inwidth, outwidth);
for (i = 0, f = 0; i < outheight; i++, f += fstep) {
yi = f >> 16;
if (yi < endy) {
lerp = f & 0xFFFF;
if (yi != oldy) {
inrow = (byte *) indata + inwidth3 * yi;
if (yi == oldy + 1)
memcpy_vfpu(row1, row2, outwidth3);
else
Image_Resample24LerpLine (inrow, row1, inwidth, outwidth);
Image_Resample24LerpLine (inrow + inwidth3, row2, inwidth, outwidth);
oldy = yi;
}
j = outwidth - 4;
while(j >= 0) {
LERPBYTE(0); LERPBYTE(1); LERPBYTE(2);
LERPBYTE(3); LERPBYTE(4); LERPBYTE(5);
LERPBYTE(6); LERPBYTE(7); LERPBYTE(8);
LERPBYTE(9); LERPBYTE(10); LERPBYTE(11);
out += 12;
row1 += 12;
row2 += 12;
j -= 4;
}
if (j & 2) {
LERPBYTE(0); LERPBYTE(1); LERPBYTE(2);
LERPBYTE(3); LERPBYTE(4); LERPBYTE(5);
out += 6;
row1 += 6;
row2 += 6;
}
if (j & 1) {
LERPBYTE(0); LERPBYTE(1); LERPBYTE(2);
out += 3;
row1 += 3;
row2 += 3;
}
row1 -= outwidth3;
row2 -= outwidth3;
}
else
{
if (yi != oldy) {
inrow = (byte *) indata + inwidth3 * yi;
if (yi == oldy+1)
memcpy_vfpu(row1, row2, outwidth3);
else
Image_Resample24LerpLine (inrow, row1, inwidth, outwidth);
oldy = yi;
}
memcpy_vfpu(out, row1, outwidth3);
}
}
free(memalloc);
}
else
{
int i, j, f;
unsigned int frac, fracstep, inwidth3 = inwidth * 3;
byte *inrow, *out;
out = static_cast<byte*>(outdata);
fracstep = inwidth * 0x10000 / outwidth;
for (i = 0; i < outheight; i++) {
inrow = (byte *) indata + inwidth3 * (i * inheight / outheight);
frac = fracstep >> 1;
j = outwidth - 4;
while (j >= 0)
{
f = (frac >> 16) * 3; NOLERPBYTE(0); NOLERPBYTE(1); NOLERPBYTE(2); frac += fracstep;
f = (frac >> 16) * 3; NOLERPBYTE(0); NOLERPBYTE(1); NOLERPBYTE(2); frac += fracstep;
f = (frac >> 16) * 3; NOLERPBYTE(0); NOLERPBYTE(1); NOLERPBYTE(2); frac += fracstep;
f = (frac >> 16) * 3; NOLERPBYTE(0); NOLERPBYTE(1); NOLERPBYTE(2); frac += fracstep;
j -= 4;
}
if (j & 2)
{
f = (frac >> 16) * 3; NOLERPBYTE(0); NOLERPBYTE(1); NOLERPBYTE(2); frac += fracstep;
f = (frac >> 16) * 3; NOLERPBYTE(0); NOLERPBYTE(1); NOLERPBYTE(2); frac += fracstep;
out += 2;
}
if (j & 1)
{
f = (frac >> 16) * 3; NOLERPBYTE(0); NOLERPBYTE(1); NOLERPBYTE(2); frac += fracstep;
out += 1;
}
}
}
}
/*
================
Image_Resample
================
*/
void Image_Resample (void *indata, int inwidth, int inheight,void *outdata, int outwidth, int outheight, int bpp, int quality)
{
if (bpp == 4)
Image_Resample32(indata, inwidth, inheight, outdata, outwidth, outheight, quality);
else if (bpp == 3)
Image_Resample24(indata, inwidth, inheight, outdata, outwidth, outheight, quality);
else
Sys_Error("Image_Resample: unsupported bpp (%d)", bpp);
}
/*
================
Image_MipReduce
================
*/
void Image_MipReduce (byte *in, byte *out, int *width, int *height, int bpp)
{
int x, y, nextrow;
nextrow = *width * bpp;
if (*width > 1)
{
*width >>= 1;
if (*height > 1)
{
*height >>= 1;
if (bpp == 4)
{
for (y = 0; y < *height; y++)
{
for (x = 0; x < *width; x++)
{
out[0] = (byte) ((in[0] + in[4] + in[nextrow] + in[nextrow + 4]) >> 2);
out[1] = (byte) ((in[1] + in[5] + in[nextrow + 1] + in[nextrow + 5]) >> 2);
out[2] = (byte) ((in[2] + in[6] + in[nextrow + 2] + in[nextrow + 6]) >> 2);
out[3] = (byte) ((in[3] + in[7] + in[nextrow + 3] + in[nextrow + 7]) >> 2);
out += 4;
in += 8;
}
in += nextrow;
}
}
else if (bpp == 3)
{
for (y = 0; y < *height; y++)
{
for (x = 0; x < *width; x++)
{
out[0] = (byte) ((in[0] + in[3] + in[nextrow] + in[nextrow + 3]) >> 2);
out[1] = (byte) ((in[1] + in[4] + in[nextrow + 1] + in[nextrow + 4]) >> 2);
out[2] = (byte) ((in[2] + in[5] + in[nextrow + 2] + in[nextrow + 5]) >> 2);
out += 3;
in += 6;
}
in += nextrow;
}
}
else
{
Sys_Error("Image_MipReduce: unsupported bpp (%d)", bpp);
}
}
else
{
if (bpp == 4)
{
for (y = 0; y < *height; y++)
{
for (x = 0; x < *width; x++)
{
out[0] = (byte) ((in[0] + in[4]) >> 1);
out[1] = (byte) ((in[1] + in[5]) >> 1);
out[2] = (byte) ((in[2] + in[6]) >> 1);
out[3] = (byte) ((in[3] + in[7]) >> 1);
out += 4;
in += 8;
}
}
}
else if (bpp == 3)
{
for (y = 0; y < *height; y++)
{
for (x = 0; x < *width; x++)
{
out[0] = (byte) ((in[0] + in[3]) >> 1);
out[1] = (byte) ((in[1] + in[4]) >> 1);
out[2] = (byte) ((in[2] + in[5]) >> 1);
out += 3;
in += 6;
}
}
}
else
{
Sys_Error("Image_MipReduce: unsupported bpp (%d)", bpp);
}
}
}
else if (*height > 1)
{
*height >>= 1;
if (bpp == 4)
{
for (y = 0; y < *height; y++)
{
for (x = 0; x < *width; x++)
{
out[0] = (byte) ((in[0] + in[nextrow]) >> 1);
out[1] = (byte) ((in[1] + in[nextrow + 1]) >> 1);
out[2] = (byte) ((in[2] + in[nextrow + 2]) >> 1);
out[3] = (byte) ((in[3] + in[nextrow + 3]) >> 1);
out += 4;
in += 4;
}
in += nextrow;
}
}
else if (bpp == 3)
{
for (y = 0; y < *height; y++)
{
for (x = 0; x < *width; x++)
{
out[0] = (byte) ((in[0] + in[nextrow]) >> 1);
out[1] = (byte) ((in[1] + in[nextrow + 1]) >> 1);
out[2] = (byte) ((in[2] + in[nextrow + 2]) >> 1);
out += 3;
in += 3;
}
in += nextrow;
}
}
else
{
Sys_Error("Image_MipReduce: unsupported bpp (%d)", bpp);
}
}
else
{
Sys_Error("Image_MipReduce: Input texture has dimensions %dx%d", width, height);
}
}
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