mirror of
https://github.com/RaySollium99/picodrive.git
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609 lines
15 KiB
C
609 lines
15 KiB
C
/*
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* upscale.c image upscaling
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*
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* This file contains upscalers for picodrive.
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*
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* scaler types:
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* nn: nearest neighbour
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* snn: "smoothed" nearest neighbour (see below)
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* bln: n-level-bilinear with n quantized weights
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* quantization: 0: a<1/(2*n), 1/n: 1/(2*n)<=a<3/(2*n), etc
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* currently n=2, n=4 are implemented (there's n=8 mixing, but no filters)
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* [NB this has been brought to my attn, which is probably the same as bl2:
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* https://www.drdobbs.com/image-scaling-with-bresenham/184405045?pgno=1]
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*
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* "smoothed" nearest neighbour: uses the average of the source pixels if no
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* source pixel covers more than 65% of the result pixel. It definitely
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* looks better than nearest neighbour and is still quite fast. It creates
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* a sharper look than a bilinear filter, at the price of some visible jags
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* on diagonal edges.
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*
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* example scaling modes:
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* 256x_Y_ -> 320x_Y_, H32/mode 4, PAR 5:4, for PAL DAR 4:3 (NTSC 7% aspect err)
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* 256x224 -> 320x240, H32/mode 4, PAR 5:4, for NTSC DAR 4:3 (PAL 7% aspect err)
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* 320x224 -> 320x240, PAR 1:1, for NTSC, DAR 4:3 (PAL 7% etc etc...)
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* 160x144 -> 320x240: GG, PAR 6:5, scaling to 320x240 for DAR 4:3
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*
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* (C) 2021 irixxxx
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*
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* This work is licensed under the terms of any of these licenses
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* (at your option):
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* - GNU GPL, version 2 or later.
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* - MAME license.
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*/
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#include "upscale.h"
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/* X x Y -> X*5/4 x Y */
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void upscale_clut_nn_x_4_5(u8 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height)
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{
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int y;
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for (y = 0; y < height; y++) {
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h_upscale_nn_4_5(di, ds, si, ss, width, f_nop);
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}
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}
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void upscale_rgb_nn_x_4_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int y;
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for (y = 0; y < height; y++) {
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h_upscale_nn_4_5(di, ds, si, ss, width, f_pal);
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}
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}
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void upscale_rgb_snn_x_4_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int y;
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for (y = 0; y < height; y++) {
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h_upscale_snn_4_5(di, ds, si, ss, width, f_pal);
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}
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}
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void upscale_rgb_bl2_x_4_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int y;
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for (y = 0; y < height; y++) {
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h_upscale_bl2_4_5(di, ds, si, ss, width, f_pal);
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}
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}
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void upscale_rgb_bl4_x_4_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int y;
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for (y = 0; y < height; y++) {
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h_upscale_bl4_4_5(di, ds, si, ss, width, f_pal);
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}
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}
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/* X x Y -> X*5/4 x Y*17/16 */
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void upscale_clut_nn_x_4_5_y_16_17(u8 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height)
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{
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int swidth = width * 5/4;
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 8; j++) {
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h_upscale_nn_4_5(di, ds, si, ss, width, f_nop);
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}
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di += ds;
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for (j = 0; j < 8; j++) {
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h_upscale_nn_4_5(di, ds, si, ss, width, f_nop);
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}
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di -= 9*ds;
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v_copy(&di[0], &di[-ds], swidth, f_nop);
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di += 9*ds;
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}
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}
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void upscale_rgb_nn_x_4_5_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int swidth = width * 5/4;
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 8; j++) {
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h_upscale_nn_4_5(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 8; j++) {
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h_upscale_nn_4_5(di, ds, si, ss, width, f_pal);
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}
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di -= 9*ds;
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v_copy(&di[0], &di[-ds], swidth, f_nop);
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di += 9*ds;
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}
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}
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void upscale_rgb_snn_x_4_5_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int swidth = width * 5/4;
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 8; j++) {
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h_upscale_snn_4_5(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 8; j++) {
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h_upscale_snn_4_5(di, ds, si, ss, width, f_pal);
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}
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/* mix lines 6-8 */
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di -= 9*ds;
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v_mix(&di[0], &di[-ds], &di[ds], swidth, p_05, f_nop);
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v_mix(&di[-ds], &di[-2*ds], &di[-ds], swidth, p_05, f_nop);
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v_mix(&di[ ds], &di[ ds], &di[ 2*ds], swidth, p_05, f_nop);
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di += 9*ds;
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}
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}
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void upscale_rgb_bl2_x_4_5_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int swidth = width * 5/4;
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 4; j++) {
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h_upscale_bl2_4_5(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 12; j++) {
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h_upscale_bl2_4_5(di, ds, si, ss, width, f_pal);
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}
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/* mix lines 3-10 */
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di -= 13*ds;
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v_mix(&di[0], &di[-ds], &di[ds], swidth, p_05, f_nop);
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for (j = 0; j < 7; j++) {
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di += ds;
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v_mix(&di[0], &di[0], &di[ds], swidth, p_05, f_nop);
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}
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di += 6*ds;
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}
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}
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void upscale_rgb_bl4_x_4_5_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int swidth = width * 5/4;
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 2; j++) {
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h_upscale_bl4_4_5(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 14; j++) {
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h_upscale_bl4_4_5(di, ds, si, ss, width, f_pal);
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}
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di -= 15*ds;
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/* mixing line 2: line 1 = -ds, line 2 = +ds */
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v_mix(&di[0], &di[-ds], &di[ds], swidth, p_025, f_nop);
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di += ds;
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/* mixing lines 3-5: line n-1 = 0, line n = +ds */
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for (j = 0; j < 3; j++) {
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v_mix(&di[0], &di[0], &di[ds], swidth, p_025, f_nop);
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di += ds;
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}
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/* mixing lines 6-9 */
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for (j = 0; j < 4; j++) {
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v_mix(&di[0], &di[0], &di[ds], swidth, p_05, f_nop);
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di += ds;
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}
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/* mixing lines 10-13 */
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for (j = 0; j < 4; j++) {
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v_mix(&di[0], &di[0], &di[ds], swidth, p_075, f_nop);
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di += ds;
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}
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/* lines 14-16, already in place */
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di += 3*ds;
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}
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}
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/* "classic" upscaler as found in several emulators. It's really more like a
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* x*4/3, y*16/15 upscaler, with an additional 5th row/17th line just inserted
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* from the source image. That gives nice n/4,n/16 alpha values plus better
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* symmetry in each block and avoids "borrowing" a row/line between blocks.
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*/
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void upscale_rgb_bln_x_4_5_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int swidth = width * 5/4;
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 4; j++) {
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h_upscale_bln_4_5(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 12; j++) {
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h_upscale_bln_4_5(di, ds, si, ss, width, f_pal);
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}
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di -= 13*ds;
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/* mixing line 4: line 3 = -ds, line 4 = +ds */
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v_mix(&di[0], &di[-ds], &di[ds], swidth, p_025, f_nop);
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di += ds;
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/* mixing lines 5-6: line n-1 = 0, line n = +ds */
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for (j = 0; j < 2; j++) {
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v_mix(&di[0], &di[0], &di[ds], swidth, p_025, f_nop);
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di += ds;
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}
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/* mixing line 7-9 */
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for (j = 0; j < 3; j++) {
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v_mix(&di[0], &di[0], &di[ds], swidth, p_05, f_nop);
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di += ds;
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}
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/* mixing lines 10-12 */
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for (j = 0; j < 3; j++) {
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v_mix(&di[0], &di[0], &di[ds], swidth, p_075, f_nop);
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di += ds;
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}
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/* lines 13-16, already in place */
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di += 4*ds;
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}
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}
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/* experimental 8 level bilinear for quality assessment */
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void upscale_rgb_bl8_x_4_5_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int swidth = width * 5/4;
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int y, j;
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for (y = 0; y < 224; y += 16) {
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for (j = 0; j < 2; j++) {
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h_upscale_bl8_4_5(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 14; j++) {
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h_upscale_bl8_4_5(di, ds, si, ss, width, f_pal);
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}
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di -= 15*ds;
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/* mixing line 2: line 2 = -ds, line 3 = +ds */
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v_mix(&di[0], &di[-ds], &di[ds], swidth, p_0125, f_nop);
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di += ds;
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/* mixing line 3: line 3 = 0, line 4 = +ds */
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v_mix(&di[0], &di[0], &di[ds], swidth, p_0125, f_nop);
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di += ds;
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/* mixing lines 4-5: line n-1 = 0, line n = +ds */
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for (j = 0; j < 2; j++) {
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v_mix(&di[0], &di[0], &di[ds], swidth, p_025, f_nop);
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di += ds;
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}
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/* mixing lines 6-7 */
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for (j = 0; j < 2; j++) {
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v_mix(&di[0], &di[0], &di[ds], 320, p_0375, f_nop);
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di += ds;
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}
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/* mixing lines 8-9 */
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for (j = 0; j < 2; j++) {
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v_mix(&di[0], &di[0], &di[ds], 320, p_05, f_nop);
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di += ds;
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}
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/* mixing lines 10-11 */
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for (j = 0; j < 2; j++) {
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v_mix(&di[0], &di[0], &di[ds], 320, p_0625, f_nop);
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di += ds;
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}
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/* mixing lines 12-13 */
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for (j = 0; j < 2; j++) {
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v_mix(&di[0], &di[0], &di[ds], 320, p_075, f_nop);
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di += ds;
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}
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/* mixing lines 14-15 */
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for (j = 0; j < 2; j++) {
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v_mix(&di[0], &di[0], &di[ds], 320, p_0875, f_nop);
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di += ds;
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}
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/* line 16, already in place */
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di += ds;
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}
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}
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/* X x Y -> X x Y*17/16 */
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void upscale_clut_nn_y_16_17(u8 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height)
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{
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 8; j++) {
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h_copy(di, ds, si, ss, width, f_nop);
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}
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di += ds;
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for (j = 0; j < 8; j++) {
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h_copy(di, ds, si, ss, width, f_nop);
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}
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di -= 9*ds;
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v_copy(&di[0], &di[-ds], width, f_nop);
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di += 9*ds;
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}
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}
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void upscale_rgb_nn_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 8; j++) {
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h_copy(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 8; j++) {
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h_copy(di, ds, si, ss, width, f_pal);
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}
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di -= 9*ds;
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v_copy(&di[0], &di[-ds], width, f_nop);
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di += 9*ds;
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}
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}
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void upscale_rgb_snn_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 8; j++) {
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h_copy(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 8; j++) {
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h_copy(di, ds, si, ss, width, f_pal);
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}
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/* mix lines 6-8 */
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di -= 9*ds;
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v_mix(&di[0], &di[-ds], &di[ds], width, p_05, f_nop);
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v_mix(&di[-ds], &di[-2*ds], &di[-ds], width, p_05, f_nop);
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v_mix(&di[ ds], &di[ ds], &di[ 2*ds], width, p_05, f_nop);
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di += 9*ds;
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}
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}
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void upscale_rgb_bl2_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 4; j++) {
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h_copy(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 12; j++) {
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h_copy(di, ds, si, ss, width, f_pal);
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}
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/* mix lines 4-11 */
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di -= 13*ds;
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v_mix(&di[0], &di[-ds], &di[ds], width, p_05, f_nop);
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for (j = 0; j < 7; j++) {
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di += ds;
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v_mix(&di[0], &di[0], &di[ds], width, p_05, f_nop);
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}
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di += 6*ds;
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}
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}
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void upscale_rgb_bl4_y_16_17(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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{
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int y, j;
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for (y = 0; y < height; y += 16) {
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for (j = 0; j < 2; j++) {
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h_copy(di, ds, si, ss, width, f_pal);
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}
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di += ds;
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for (j = 0; j < 14; j++) {
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h_copy(di, ds, si, ss, width, f_pal);
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}
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di -= 15*ds;
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/* mixing line 2: line 1 = -ds, line 2 = +ds */
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v_mix(&di[0], &di[-ds], &di[ds], width, p_025, f_nop);
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di += ds;
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/* mixing lines 3-5: line n-1 = 0, line n = +ds */
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for (j = 0; j < 3; j++) {
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v_mix(&di[0], &di[0], &di[ds], width, p_025, f_nop);
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di += ds;
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}
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/* mixing lines 6-9 */
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for (j = 0; j < 4; j++) {
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v_mix(&di[0], &di[0], &di[ds], width, p_05, f_nop);
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di += ds;
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}
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/* mixing lines 10-13 */
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for (j = 0; j < 4; j++) {
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v_mix(&di[0], &di[0], &di[ds], width, p_075, f_nop);
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di += ds;
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}
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/* lines 14-16, already in place */
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di += 3*ds;
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}
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}
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/* X x Y -> X*2/1 x Y, e.g. for X 160->320 (GG) */
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void upscale_clut_nn_x_1_2(u8 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height)
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{
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int y;
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for (y = 0; y < height; y++) {
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h_upscale_nn_1_2(di, ds, si, ss, width, f_nop);
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}
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}
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|
|
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void upscale_rgb_nn_x_1_2(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
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|
{
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|
int y;
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|
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|
for (y = 0; y < height; y++) {
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h_upscale_nn_1_2(di, ds, si, ss, width, f_pal);
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}
|
|
}
|
|
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void upscale_rgb_bl2_x_1_2(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
|
|
{
|
|
int y;
|
|
|
|
for (y = 0; y < height; y++) {
|
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h_upscale_bl2_1_2(di, ds, si, ss, width, f_pal);
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}
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|
}
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|
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/* X x Y -> X*2/1 x Y*5/3 (GG) */
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void upscale_clut_nn_x_1_2_y_3_5(u8 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height)
|
|
{
|
|
int swidth = width * 2;
|
|
int y, j;
|
|
|
|
for (y = 0; y < height; y += 3) {
|
|
/* lines 0,2,4 */
|
|
for (j = 0; j < 3; j++) {
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h_upscale_nn_1_2(di, ds, si, ss, width, f_nop);
|
|
di += ds;
|
|
}
|
|
/* lines 1,3 */
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|
di -= 5*ds;
|
|
for (j = 0; j < 2; j++) {
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|
v_copy(&di[0], &di[-ds], swidth, f_nop);
|
|
di += 2*ds;
|
|
}
|
|
}
|
|
}
|
|
|
|
void upscale_rgb_nn_x_1_2_y_3_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
|
|
{
|
|
int swidth = width * 2;
|
|
int y, j;
|
|
|
|
for (y = 0; y < height; y += 3) {
|
|
for (j = 0; j < 3; j++) {
|
|
h_upscale_nn_1_2(di, ds, si, ss, width, f_pal);
|
|
di += ds;
|
|
}
|
|
di -= 5*ds;
|
|
for (j = 0; j < 2; j++) {
|
|
v_copy(&di[0], &di[-ds], swidth, f_nop);
|
|
di += 2*ds;
|
|
}
|
|
}
|
|
}
|
|
|
|
void upscale_rgb_bl2_x_1_2_y_3_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
|
|
{
|
|
int swidth = width * 2;
|
|
int y, j;
|
|
|
|
for (y = 0; y < height; y += 3) {
|
|
for (j = 0; j < 3; j++) {
|
|
h_upscale_bl2_1_2(di, ds, si, ss, width, f_pal);
|
|
di += ds;
|
|
}
|
|
di -= 5*ds;
|
|
for (j = 0; j < 2; j++) {
|
|
v_mix(&di[0], &di[-ds], &di[ds], swidth, p_05, f_nop);
|
|
di += 2*ds;
|
|
}
|
|
}
|
|
}
|
|
|
|
void upscale_rgb_bl4_x_1_2_y_3_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
|
|
{
|
|
int swidth = width * 2;
|
|
int y, j, d;
|
|
|
|
/* for 1st block backwards reference virtually duplicate source line 0 */
|
|
for (y = 0, d = 2*ds; y < height; y += 3, d = -ds) {
|
|
di += 2*ds;
|
|
for (j = 0; j < 3; j++) {
|
|
h_upscale_bl2_1_2(di, ds, si, ss, width, f_pal);
|
|
}
|
|
di -= 5*ds;
|
|
v_mix(&di[0], &di[d ], &di[2*ds], swidth, p_05, f_nop); /*-1+0 */
|
|
di += ds;
|
|
v_mix(&di[0], &di[ds], &di[2*ds], swidth, p_075, f_nop);/* 0+1 */
|
|
di += ds;
|
|
v_mix(&di[0], &di[ 0], &di[ ds], swidth, p_025, f_nop);/* 0+1 */
|
|
di += ds;
|
|
v_mix(&di[0], &di[ 0], &di[ ds], swidth, p_05, f_nop); /* 1+2 */
|
|
di += 2*ds;
|
|
}
|
|
}
|
|
|
|
/* X x Y -> X x Y*5/3, e.g. for Y 144->240 (GG) */
|
|
void upscale_clut_nn_y_3_5(u8 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height)
|
|
{
|
|
int y, j;
|
|
|
|
for (y = 0; y < height; y += 3) {
|
|
/* lines 0,2,4 */
|
|
for (j = 0; j < 3; j++) {
|
|
h_copy(di, ds, si, ss, width, f_nop);
|
|
di += ds;
|
|
}
|
|
/* lines 1,3 */
|
|
di -= 5*ds;
|
|
for (j = 0; j < 2; j++) {
|
|
v_copy(&di[0], &di[-ds], width, f_nop);
|
|
di += 2*ds;
|
|
}
|
|
}
|
|
}
|
|
|
|
void upscale_rgb_nn_y_3_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
|
|
{
|
|
int y, j;
|
|
|
|
for (y = 0; y < height; y += 3) {
|
|
for (j = 0; j < 3; j++) {
|
|
h_copy(di, ds, si, ss, width, f_pal);
|
|
di += ds;
|
|
}
|
|
di -= 5*ds;
|
|
for (j = 0; j < 2; j++) {
|
|
v_copy(&di[0], &di[-ds], width, f_nop);
|
|
di += 2*ds;
|
|
}
|
|
}
|
|
}
|
|
|
|
void upscale_rgb_bl2_y_3_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
|
|
{
|
|
int y, j;
|
|
|
|
for (y = 0; y < height; y += 3) {
|
|
for (j = 0; j < 3; j++) {
|
|
h_copy(di, ds, si, ss, width, f_pal);
|
|
di += ds;
|
|
}
|
|
di -= 5*ds;
|
|
for (j = 0; j < 2; j++) {
|
|
v_mix(&di[0], &di[-ds], &di[ds], width, p_05, f_nop);
|
|
di += 2*ds;
|
|
}
|
|
}
|
|
}
|
|
|
|
void upscale_rgb_bl4_y_3_5(u16 *__restrict di, int ds, u8 *__restrict si, int ss, int width, int height, u16 *pal)
|
|
{
|
|
int y, j, d;
|
|
|
|
/* for 1st block backwards reference virtually duplicate source line 0 */
|
|
for (y = 0, d = 2*ds; y < height; y += 3, d = -ds) {
|
|
di += 2*ds;
|
|
for (j = 0; j < 3; j++) {
|
|
h_copy(di, ds, si, ss, width, f_pal);
|
|
}
|
|
di -= 5*ds;
|
|
v_mix(&di[0], &di[d ], &di[2*ds], width, p_05, f_nop); /*-1+0 */
|
|
di += ds;
|
|
v_mix(&di[0], &di[ds], &di[2*ds], width, p_075, f_nop);/* 0+1 */
|
|
di += ds;
|
|
v_mix(&di[0], &di[ 0], &di[ ds], width, p_025, f_nop);/* 0+1 */
|
|
di += ds;
|
|
v_mix(&di[0], &di[ 0], &di[ ds], width, p_05, f_nop); /* 1+2 */
|
|
di += 2*ds;
|
|
}
|
|
}
|
|
|