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scaler_gen_filter - small simplification

This commit is contained in:
libretroadmin 2025-07-20 02:37:36 +02:00
parent 974c016241
commit 02f3f31121
2 changed files with 11 additions and 26 deletions
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25
libretro-common/gfx/scaler/scaler_filter.c
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@ -84,26 +84,16 @@ static bool validate_filter(struct scaler_ctx *ctx)
for (i = 0; i < ctx->out_width; i++)
{
if (ctx->horiz.filter_pos[i] > max_w_pos || ctx->horiz.filter_pos[i] < 0)
{
#ifndef NDEBUG
fprintf(stderr, "Out X = %d => In X = %d\n", i, ctx->horiz.filter_pos[i]);
#endif
return false;
}
}
max_h_pos = ctx->in_height - ctx->vert.filter_len;
for (i = 0; i < ctx->out_height; i++)
{
if (ctx->vert.filter_pos[i] > max_h_pos || ctx->vert.filter_pos[i] < 0)
{
#ifndef NDEBUG
fprintf(stderr, "Out Y = %d => In Y = %d\n", i, ctx->vert.filter_pos[i]);
#endif
return false;
}
}
return true;
}
@ -200,13 +190,12 @@ bool scaler_gen_filter(struct scaler_ctx *ctx)
x_step = (1 << 16) * ctx->in_width / ctx->out_width;
y_step = (1 << 16) * ctx->in_height / ctx->out_height;
x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15);
y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15);
switch (ctx->scaler_type)
{
case SCALER_TYPE_POINT:
x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15);
y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15);
gen_filter_point_sub(&ctx->horiz, ctx->out_width, x_pos, x_step);
gen_filter_point_sub(&ctx->vert, ctx->out_height, y_pos, y_step);
@ -214,9 +203,6 @@ bool scaler_gen_filter(struct scaler_ctx *ctx)
break;
case SCALER_TYPE_BILINEAR:
x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15);
y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15);
gen_filter_bilinear_sub(&ctx->horiz, ctx->out_width, x_pos, x_step);
gen_filter_bilinear_sub(&ctx->vert, ctx->out_height, y_pos, y_step);
break;
@ -224,9 +210,8 @@ bool scaler_gen_filter(struct scaler_ctx *ctx)
case SCALER_TYPE_SINC:
/* Need to expand the filter when downsampling
* to get a proper low-pass effect. */
x_pos = (1 << 15) * ctx->in_width / ctx->out_width - (1 << 15) - (sinc_size << 15);
y_pos = (1 << 15) * ctx->in_height / ctx->out_height - (1 << 15) - (sinc_size << 15);
x_pos -= (sinc_size << 15);
y_pos -= (sinc_size << 15);
gen_filter_sinc_sub(&ctx->horiz, ctx->out_width, x_pos, x_step,
ctx->in_width > ctx->out_width ? (double)ctx->out_width / ctx->in_width : 1.0);
@ -238,7 +223,7 @@ bool scaler_gen_filter(struct scaler_ctx *ctx)
break;
}
/* Makes sure that we never sample outside our rectangle. */
/* Makes sure that we never sample outside our rectangle */
fixup_filter_sub(&ctx->horiz, ctx->out_width, ctx->in_width);
fixup_filter_sub(&ctx->vert, ctx->out_height, ctx->in_height);