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test.c
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test.c
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Copyright © 2019 Hans Petter Jansson. See COPYING for details. */
#include <math.h> /* stb_image_resize needs pow() */
#include <sys/random.h>
#include <glib.h>
#include <glib/gprintf.h>
#include <pixman.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <SDL/SDL_rotozoom.h> /* zoomSurface() from SDL_gfx */
#include <libswscale/swscale.h>
#include <stdlib.h> /* strtoul, strtod */
#include "smolscale.h"
#include "png.h"
#define STB_IMAGE_RESIZE_IMPLEMENTATION
#include "stb_image_resize.h"
#define PIXEL_TYPE_SMOL SMOL_PIXEL_ARGB8_PREMULTIPLIED
#define PIXEL_TYPE_LIBSWSCALE AV_PIX_FMT_ARGB
#define CORRECTNESS_WIDTH_MIN 1
#define CORRECTNESS_WIDTH_MAX 65535
#define CORRECTNESS_WIDTH_STEPS 100
#define CORRECTNESS_HEIGHT_MIN 1
#define CORRECTNESS_HEIGHT_MAX 65535
#define CORRECTNESS_HEIGHT_STEPS 10
#define CORRECTNESS_WIDTH_STEP_SIZE (((CORRECTNESS_WIDTH_MAX) - (CORRECTNESS_WIDTH_MIN)) / (CORRECTNESS_WIDTH_STEPS))
#define CORRECTNESS_HEIGHT_STEP_SIZE (((CORRECTNESS_HEIGHT_MAX) - (CORRECTNESS_HEIGHT_MIN)) / (CORRECTNESS_HEIGHT_STEPS))
#define BENCHMARK_CONV_WIDTH 3840
#define BENCHMARK_CONV_HEIGHT 2160
/* Defined in png.c */
gboolean smoltest_load_image (const gchar *file_name,
guint *width_out,
guint *height_out,
gpointer *data_out);
void smoltest_save_image (const gchar *prefix,
guint32 *data,
guint width,
guint height);
/* --- Common --- */
static SmolPixelType smol_ptype_in = PIXEL_TYPE_SMOL;
static SmolPixelType smol_ptype_out = PIXEL_TYPE_SMOL;
typedef struct
{
guint in_width, in_height;
gpointer in_data, out_data;
gpointer priv;
}
ScaleParams;
typedef enum
{
SCALE_OP_BENCHMARK_PROP,
SCALE_OP_BENCHMARK_CONV,
SCALE_OP_CHECK,
SCALE_OP_GENERATE
}
ScaleOperation;
typedef void (*ScaleInitFunc) (ScaleParams *, gconstpointer, guint, guint);
typedef void (*ScaleFiniFunc) (ScaleParams *);
typedef void (*ScaleDoFunc) (ScaleParams *, guint, guint);
static const gchar * const smol_pixel_type_names [SMOL_PIXEL_MAX] =
{
/* Premultiplied */
"RGBA8",
"BGRA8",
"ARGB8",
"ABGR8",
/* Unassociated */
"rgbA8",
"bgrA8",
"Argb8",
"Abgr8",
/* No alpha */
"rgb8",
"bgr8"
};
static gpointer G_GNUC_UNUSED
gen_color_canvas (guint width, guint height, guint32 color)
{
guint32 *canvas;
guint32 *canvas_end;
guint32 *p;
canvas = g_malloc (width * height * sizeof (guint32));
canvas_end = canvas + width * height;
for (p = canvas; p < canvas_end; p++)
*p = color;
return canvas;
}
static gpointer
gen_random_canvas (guint width, guint height)
{
guint8 *canvas;
guint8 *canvas_end;
guint8 *p;
canvas = g_malloc (width * height * sizeof (guint32));
canvas_end = canvas + width * height;
for (p = canvas; p < canvas_end; )
{
ssize_t r = getrandom (p, canvas_end - p, 0);
if (r < 0)
continue;
p += r;
}
return canvas;
}
static gdouble
compute_elapsed (struct timespec *before, struct timespec *after)
{
gint64 before_usec = before->tv_nsec / 1000;
gint64 after_usec = after->tv_nsec / 1000;
guint64 diff;
diff = (after->tv_sec * 1000000) - (before->tv_sec * 1000000);
diff += (after_usec - before_usec);
return diff / (gdouble) 1000000.0;
}
#if 0
static void
premultiply_alpha (guint32 *pixels, guint width, guint height)
{
guint i;
for (i = 0; i < width * height; i++)
{
guint32 p = pixels [i];
guint32 ch [4];
ch [0] = (p >> 24) & 0xff;
ch [1] = (p >> 16) & 0xff;
ch [2] = (p >> 8) & 0xff;
ch [3] = p & 0xff;
ch [1] = (ch [1] * ch [0] * ((65536 * 256 + 255) / 255)) >> 24; /* * 65794 */
ch [2] = (ch [2] * ch [0] * ((65536 * 256 + 255) / 255)) >> 24; /* * 65794 */
ch [3] = (ch [3] * ch [0] * ((65536 * 256 + 255) / 255)) >> 24; /* * 65794 */
pixels [i] = (ch [0] << 24) | (ch [1] << 16) | (ch [2] << 8) | (ch [3]);
}
}
static guint8
unpremultiply_channel (guint8 x, guint8 a)
{
if (a == 0)
return 0;
if (x > a)
x = a;
return ((guint32) x * 255 + (a / 2)) / a;
}
static void
unpremultiply_alpha (guint32 *pixels, guint width, guint height)
{
guint i;
for (i = 0; i < width * height; i++)
{
guint32 p = pixels [i];
guint32 ch [4];
ch [0] = (p >> 24) & 0xff;
ch [1] = (p >> 16) & 0xff;
ch [2] = (p >> 8) & 0xff;
ch [3] = p & 0xff;
ch [1] = unpremultiply_channel (ch [1], ch [0]);
ch [2] = unpremultiply_channel (ch [2], ch [0]);
ch [3] = unpremultiply_channel (ch [3], ch [0]);
pixels [i] = (ch [0] << 24) | (ch [1] << 16) | (ch [2] << 8) | (ch [3]);
}
}
#endif
/* --- Benchmarking support --- */
typedef struct
{
gint width_in, height_in;
gint width_out, height_out;
gdouble elapsed_s;
}
Sample;
typedef struct
{
GArray *samples;
}
Benchmark;
static gdouble
sample_get_pps (const Sample *sample)
{
return (sample->width_out * (gdouble) sample->height_out
+ sample->width_in * (gdouble) sample->height_in) / sample->elapsed_s;
}
static Benchmark *
benchmark_new (void)
{
Benchmark *benchmark;
benchmark = g_new0 (Benchmark, 1);
benchmark->samples = g_array_new (FALSE, FALSE, sizeof (Sample));
return benchmark;
}
static void
benchmark_destroy (Benchmark *benchmark)
{
g_array_free (benchmark->samples, TRUE);
}
static void
benchmark_add_sample (Benchmark *benchmark,
gint width_in, gint height_in,
gint width_out, gint height_out,
gdouble elapsed_s)
{
Sample m;
m.width_in = width_in;
m.height_in = height_in;
m.width_out = width_out;
m.height_out = height_out;
m.elapsed_s = elapsed_s;
g_array_append_val (benchmark->samples, m);
}
static gint
samples_cmp (gconstpointer a, gconstpointer b)
{
const Sample *ba = a, *bb = b;
gint64 diff_i;
diff_i = ba->width_in * ba->height_in
- (gint64) bb->width_in * bb->height_in;
if (diff_i != 0)
return diff_i;
diff_i = ba->width_out * ba->height_out
- (gint64) bb->width_out * bb->height_out;
if (diff_i != 0)
return diff_i;
if (ba->elapsed_s < bb->elapsed_s)
return -1;
else if (ba->elapsed_s > bb->elapsed_s)
return 1;
return 0;
}
static gint
samples_cmp_params (gconstpointer a, gconstpointer b)
{
const Sample *ba = a, *bb = b;
gint64 diff_i;
diff_i = ba->width_in * ba->height_in
- (gint64) bb->width_in * bb->height_in;
if (diff_i != 0)
return diff_i;
diff_i = ba->width_out * ba->height_out
- (gint64) bb->width_out * bb->height_out;
if (diff_i != 0)
return diff_i;
return 0;
}
static gint
samples_cmp_pps (gconstpointer a, gconstpointer b)
{
gdouble pps_a, pps_b;
pps_a = sample_get_pps (a);
pps_b = sample_get_pps (b);
if (pps_a > pps_b)
return -1;
else if (pps_a < pps_b)
return 1;
return 0;
}
static void
benchmark_postprocess (Benchmark *benchmark)
{
GArray *samples_new;
guint i;
g_array_sort (benchmark->samples, samples_cmp);
samples_new = g_array_new (FALSE, FALSE, sizeof (Sample));
for (i = 0; i < benchmark->samples->len; i++)
{
const Sample *m = &g_array_index (benchmark->samples, Sample, i);
if (i == 0 || samples_cmp_params (m, &g_array_index (benchmark->samples, Sample, i - 1)) != 0)
{
g_array_append_val (samples_new, *m);
}
}
g_array_free (benchmark->samples, TRUE);
benchmark->samples = samples_new;
}
static void
benchmark_print_samples (Benchmark *benchmark, FILE *f)
{
guint i;
for (i = 0; i < benchmark->samples->len; i++)
{
const Sample *m = &g_array_index (benchmark->samples, Sample, i);
g_fprintf (f, "%u %u %.6lf %.1lf\n",
m->width_out, m->height_out, m->elapsed_s,
sample_get_pps (m));
}
}
static void
benchmark_print_average (Benchmark *benchmark, FILE *f)
{
GArray *samples_by_pps;
gdouble sum = 0.0;
gdouble ntiles [2];
guint i;
samples_by_pps = g_array_copy (benchmark->samples);
g_array_sort (samples_by_pps, samples_cmp_pps);
for (i = 0; i < samples_by_pps->len; i++)
{
const Sample *m = &g_array_index (samples_by_pps, Sample, i);
sum += sample_get_pps (m);
}
ntiles [0] = sample_get_pps (&g_array_index (samples_by_pps, const Sample,
(gint) (samples_by_pps->len * 0.05)));
ntiles [1] = sample_get_pps (&g_array_index (samples_by_pps, const Sample,
(gint) (samples_by_pps->len * 0.95)));
g_fprintf (f, "%.1lf %.1lf %.1lf\n", sum / (gdouble) samples_by_pps->len, ntiles [0], ntiles [1]);
g_array_free (samples_by_pps, TRUE);
}
/* --- Conversion benchmarks --- */
typedef struct
{
Benchmark *bm [SMOL_PIXEL_MAX] [SMOL_PIXEL_MAX];
}
ConvBenchmark;
static ConvBenchmark *
conv_benchmark_new (void)
{
ConvBenchmark *conv_bm;
gint i, j;
conv_bm = g_new0 (ConvBenchmark, 1);
for (i = 0; i < SMOL_PIXEL_MAX; i++)
{
for (j = 0; j < SMOL_PIXEL_MAX; j++)
{
conv_bm->bm [i] [j] = benchmark_new ();
}
}
return conv_bm;
}
static void
conv_benchmark_destroy (ConvBenchmark *conv_bm)
{
gint i, j;
for (i = 0; i < SMOL_PIXEL_MAX; i++)
{
for (j = 0; j < SMOL_PIXEL_MAX; j++)
{
benchmark_destroy (conv_bm->bm [i] [j]);
}
}
g_free (conv_bm);
}
static void
conv_benchmark_add_sample (ConvBenchmark *conv_bm,
SmolPixelType ptype_in, SmolPixelType ptype_out,
gint width_in, gint height_in,
gint width_out, gint height_out,
gdouble elapsed_s)
{
benchmark_add_sample (conv_bm->bm [ptype_in] [ptype_out],
width_in, height_in,
width_out, height_out,
elapsed_s);
}
static void
conv_benchmark_postprocess (ConvBenchmark *conv_bm)
{
gint i, j;
for (i = 0; i < SMOL_PIXEL_MAX; i++)
{
for (j = 0; j < SMOL_PIXEL_MAX; j++)
benchmark_postprocess (conv_bm->bm [i] [j]);
}
}
static void
conv_benchmark_print (ConvBenchmark *conv_bm, FILE *f)
{
gint i, j;
fprintf (f, "Repack ");
for (j = 0; j < SMOL_PIXEL_MAX; j++)
{
fprintf (f, "%7.7s ", smol_pixel_type_names [j]);
}
fputc ('\n', f);
for (i = 0; i < SMOL_PIXEL_MAX; i++)
{
fprintf (f, "%7.7s ", smol_pixel_type_names [i]);
for (j = 0; j < SMOL_PIXEL_MAX; j++)
{
const Sample *sample;
sample = &g_array_index (conv_bm->bm [i] [j]->samples, Sample, 0);
fprintf (f, "%1.5lf ", sample->elapsed_s);
}
fputc ('\n', f);
}
}
/* --- Pixman --- */
static void
scale_init_pixman (ScaleParams *params, gconstpointer in_raw, guint in_width, guint in_height)
{
params->in_width = in_width;
params->in_height = in_height;
params->in_data = pixman_image_create_bits (PIXMAN_a8r8g8b8,
in_width, in_height,
(void *) in_raw,
in_width * sizeof (guint32));
}
static void
scale_fini_pixman (ScaleParams *params)
{
pixman_image_unref (params->in_data);
free (params->out_data);
pixman_image_unref (params->priv);
}
static void
scale_do_pixman (ScaleParams *params, guint out_width, guint out_height)
{
pixman_image_t *pixman_image = params->in_data;
pixman_f_transform_t ftransform;
pixman_transform_t transform;
double fscale_x, fscale_y;
pixman_fixed_t *pixman_params;
int n_params;
guint32 *pixels;
pixman_image_t *tmp;
if (params->out_data)
free (params->out_data);
if (params->priv)
pixman_image_unref (params->priv);
/* Setup */
pixman_f_transform_init_identity (&ftransform);
fscale_x = (double) params->in_width / (double) out_width;
fscale_y = (double) params->in_height / (double) out_height;
pixman_f_transform_scale (&ftransform, NULL, fscale_x, fscale_y);
pixman_transform_from_pixman_f_transform (&transform, &ftransform);
pixman_image_set_transform (pixman_image, &transform);
pixman_params = pixman_filter_create_separable_convolution (
&n_params,
pixman_double_to_fixed (fscale_x),
pixman_double_to_fixed (fscale_y),
PIXMAN_KERNEL_IMPULSE,
PIXMAN_KERNEL_IMPULSE,
PIXMAN_KERNEL_BOX,
PIXMAN_KERNEL_BOX,
1,
1);
if (fscale_x > 2.0 || fscale_y > 2.0)
{
pixman_image_set_filter (pixman_image, PIXMAN_FILTER_SEPARABLE_CONVOLUTION, pixman_params, n_params);
}
else
{
pixman_image_set_filter (pixman_image, PIXMAN_FILTER_BILINEAR, NULL, 0);
}
pixman_image_set_repeat (pixman_image, PIXMAN_REPEAT_NONE);
free (pixman_params);
/* Scale */
pixels = calloc (1, out_width * out_height * sizeof (guint32));
tmp = pixman_image_create_bits (PIXMAN_a8r8g8b8,
out_width, out_height,
pixels,
out_width * 4);
pixman_image_composite (PIXMAN_OP_SRC,
pixman_image, NULL, tmp,
0, 0, 0, 0, 0, 0,
out_width, out_height);
params->priv = tmp;
params->out_data = pixels;
}
/* --- GDK-Pixbuf --- */
static void
scale_init_gdk_pixbuf (ScaleParams *params, gconstpointer in_raw, guint in_width, guint in_height)
{
params->in_data = gdk_pixbuf_new_from_data (in_raw, GDK_COLORSPACE_RGB, TRUE,
8, in_width, in_height, in_width * sizeof (guint32),
NULL, NULL);
}
static void
scale_fini_gdk_pixbuf (ScaleParams *params)
{
g_object_unref (params->in_data);
if (params->priv)
{
g_object_unref (params->priv);
params->priv = NULL;
}
}
static void
scale_do_gdk_pixbuf (ScaleParams *params, guint out_width, guint out_height)
{
if (params->priv)
{
g_object_unref (params->priv);
params->priv = NULL;
}
params->priv = gdk_pixbuf_scale_simple (params->in_data, out_width, out_height,
GDK_INTERP_BILINEAR);
params->out_data = gdk_pixbuf_get_pixels (params->priv);
}
/* --- SDL --- */
static void
scale_init_sdl (ScaleParams *params, gconstpointer in_raw, guint in_width, guint in_height)
{
SDL_Surface *surface;
#if 0
/* No need to initialize SDL subsystems when we're just scaling images
* on the CPU */
if (!sdl_is_initialized)
{
SDL_Init (SDL_INIT_VIDEO);
sdl_is_initialized = TRUE;
}
#endif
params->in_width = in_width;
params->in_height = in_height;
surface = SDL_CreateRGBSurfaceFrom ((void *) in_raw,
in_width,
in_height,
32,
in_width * sizeof (guint32),
0x000000ff,
0x0000ff00,
0x00ff0000,
0xff000000);
params->in_data = surface;
}
static void
scale_fini_sdl (ScaleParams *params)
{
if (params->in_data)
{
SDL_FreeSurface (params->in_data);
params->in_data = NULL;
}
if (params->priv)
{
SDL_FreeSurface (params->priv);
params->priv = NULL;
}
}
static void
scale_do_sdl (ScaleParams *params, guint out_width, guint out_height)
{
SDL_Surface *scaled_surface [2];
guint x_shrink_factor, y_shrink_factor;
if (params->priv)
{
SDL_FreeSurface (params->priv);
params->priv = NULL;
}
/* Find intermediate size and integer divisors for shrinkSurface */
x_shrink_factor = params->in_width / out_width;
y_shrink_factor = params->in_height / out_height;
if (x_shrink_factor < 2)
x_shrink_factor = 1;
else
out_width *= x_shrink_factor;
if (y_shrink_factor < 2)
y_shrink_factor = 1;
else
out_height *= y_shrink_factor;
/* NOTE: zoomSurface() seems to fail with dimensions greater than 16384 */
scaled_surface [0] = scaled_surface [1] =
zoomSurface (params->in_data,
out_width / (gdouble) params->in_width,
out_height / (gdouble) params->in_height,
SMOOTHING_ON);
if (!scaled_surface [0])
{
g_printerr ("\n zoomSurface failed: %ux%u -> %ux%u\n",
params->in_width, params->in_height,
out_width, out_height);
return;
}
if (x_shrink_factor > 1 || y_shrink_factor > 1)
{
scaled_surface [1] = shrinkSurface (scaled_surface [0], x_shrink_factor, y_shrink_factor);
SDL_FreeSurface (scaled_surface [0]);
if (!scaled_surface [1])
{
g_printerr ("\n shrinkSurface failed: %ux%u -> %ux%u, shrink factors %u/%u\n",
params->in_width, params->in_height,
out_width, out_height,
x_shrink_factor, y_shrink_factor);
return;
}
}
params->priv = scaled_surface [1];
params->out_data = scaled_surface [1]->pixels;
}
/* --- Skia --- */
#ifdef WITH_SKIA
/* Defined in skia.c */
void skia_scale_raw (const uint32_t *in_raw, int in_width, int in_height,
uint32_t *out_raw, int out_width, int out_height);
static void
scale_init_skia (ScaleParams *params, gconstpointer in_raw, guint in_width, guint in_height)
{
params->in_width = in_width;
params->in_height = in_height;
params->in_data = (gpointer) in_raw;
}
static void
scale_fini_skia (G_GNUC_UNUSED ScaleParams *params)
{
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
}
static void
scale_do_skia (ScaleParams *params, guint out_width, guint out_height)
{
gpointer scaled;
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
scaled = g_new (guint32, out_width * out_height);
skia_scale_raw (params->in_data,
params->in_width, params->in_height,
scaled,
out_width, out_height);
params->out_data = scaled;
}
#endif
/* --- Smolscale --- */
static void
scale_init_smol (ScaleParams *params, gconstpointer in_raw, guint in_width, guint in_height)
{
params->in_width = in_width;
params->in_height = in_height;
params->in_data = (gpointer) in_raw;
}
static void
scale_fini_smol (G_GNUC_UNUSED ScaleParams *params)
{
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
}
static void
scale_do_smol (ScaleParams *params, guint out_width, guint out_height)
{
gpointer scaled;
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
scaled = g_new (guint32, out_width * out_height);
smol_scale_simple (params->in_data,
smol_ptype_in,
params->in_width, params->in_height,
params->in_width * sizeof (guint32),
scaled,
smol_ptype_out,
out_width, out_height,
out_width * sizeof (guint32),
FALSE);
params->out_data = scaled;
}
/* --- Smolscale, threaded --- */
static void
scale_init_smol_threaded (ScaleParams *params, gconstpointer in_raw, guint in_width, guint in_height)
{
params->in_width = in_width;
params->in_height = in_height;
params->in_data = (gpointer) in_raw;
}
static void
scale_fini_smol_threaded (G_GNUC_UNUSED ScaleParams *params)
{
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
}
static void
scale_smol_thread_worker (gpointer data, SmolScaleCtx *scale_ctx)
{
guint32 first_row, n_rows;
first_row = GPOINTER_TO_UINT (data) >> 16;
n_rows = GPOINTER_TO_UINT (data) & 0xffff;
smol_scale_batch (scale_ctx, first_row, n_rows);
}
static void
scale_do_smol_threaded (ScaleParams *params, guint out_width, guint out_height)
{
SmolScaleCtx *scale_ctx;
GThreadPool *thread_pool;
gpointer scaled;
guint32 n_threads;
guint32 batch_n_rows;
guint32 i;
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
scaled = g_new (guint32, out_width * out_height);
scale_ctx = smol_scale_new (params->in_data,
smol_ptype_in,
params->in_width, params->in_height, params->in_width * sizeof (guint32),
scaled,
smol_ptype_out,
out_width, out_height, out_width * sizeof (guint32),
FALSE);
n_threads = g_get_num_processors ();
thread_pool = g_thread_pool_new ((GFunc) scale_smol_thread_worker,
scale_ctx,
n_threads,
FALSE,
NULL);
batch_n_rows = (out_height + n_threads - 1) / n_threads;
for (i = 0; i < out_height; )
{
uint32_t n = MIN (batch_n_rows, out_height - i);
g_thread_pool_push (thread_pool, GUINT_TO_POINTER ((i << 16) | n), NULL);
i += n;
}
g_thread_pool_free (thread_pool, FALSE, TRUE);
smol_scale_destroy (scale_ctx);
params->out_data = scaled;
}
/* --- libswscale --- */
static void
scale_init_libswscale (ScaleParams *params, gconstpointer in_raw, guint in_width, guint in_height)
{
params->in_width = in_width;
params->in_height = in_height;
params->in_data = (gpointer) in_raw;
}
static void
scale_fini_libswscale (G_GNUC_UNUSED ScaleParams *params)
{
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
}
static void
scale_do_libswscale (ScaleParams *params, guint out_width, guint out_height)
{
struct SwsContext *ctx;
const uint8_t *src_planes;
uint8_t *dest_planes;
int src_stride, dest_stride;
gdouble fscale_x, fscale_y;
int flags;
gpointer scaled;
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
scaled = g_new (guint32, out_width * out_height);
src_planes = params->in_data;
src_stride = params->in_width * sizeof (guint32);
dest_planes = scaled;
dest_stride = out_width * sizeof (guint32);
fscale_x = (double) params->in_width / (double) out_width;
fscale_y = (double) params->in_height / (double) out_height;
flags = (fscale_x <= 2.0 || fscale_y <= 2.0) ? SWS_FAST_BILINEAR : SWS_AREA;
ctx = sws_getContext (params->in_width, params->in_height, PIXEL_TYPE_LIBSWSCALE,
out_width, out_height, PIXEL_TYPE_LIBSWSCALE,
flags,
NULL, NULL, NULL);
sws_scale (ctx, &src_planes, &src_stride, 0, params->in_height,
&dest_planes, &dest_stride);
sws_freeContext (ctx);
params->out_data = scaled;
}
/* --- stb --- */
static void
scale_init_stb (ScaleParams *params, gconstpointer in_raw, guint in_width, guint in_height)
{
params->in_width = in_width;
params->in_height = in_height;
params->in_data = (gpointer) in_raw;
}
static void
scale_fini_stb (G_GNUC_UNUSED ScaleParams *params)
{
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
}
static void
scale_do_stb (ScaleParams *params, guint out_width, guint out_height)
{
gpointer scaled;
if (params->priv)
g_free (params->priv);
if (params->out_data)
g_free (params->out_data);
scaled = g_new (guint32, out_width * out_height);
#if 0
stbir_resize_uint8 (params->in_data, params->in_width, params->in_height, 0,
scaled, out_width, out_height, 0, 4);
#else
stbir_resize_uint8_generic (params->in_data, params->in_width, params->in_height, 0,
scaled, out_width, out_height, 0, 4, 0,
STBIR_FLAG_ALPHA_PREMULTIPLIED,
STBIR_EDGE_ZERO,
STBIR_FILTER_BOX,
STBIR_COLORSPACE_LINEAR,
NULL);
#endif
params->out_data = scaled;
}
/* --- Benchmarks --- */
static void
run_benchmark_proportional (gpointer raw_data,
guint n_repetitions,
guint in_width, guint in_height,
guint out_width_min, guint out_width_max,
guint out_height_min, guint out_height_max,
guint n_steps,
ScaleInitFunc init_func,