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/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2009-2015 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "spice-bitmap-utils.h"
#define RED_BITMAP_UTILS_RGB16
#include "red_bitmap_utils_tmpl.c"
#define RED_BITMAP_UTILS_RGB24
#include "red_bitmap_utils_tmpl.c"
#define RED_BITMAP_UTILS_RGB32
#include "red_bitmap_utils_tmpl.c"
#define GRADUAL_HIGH_RGB24_TH -0.03
#define GRADUAL_HIGH_RGB16_TH 0
// setting a more permissive threshold for stream identification in order
// not to miss streams that were artificially scaled on the guest (e.g., full screen view
// in window media player 12). see red_stream_add_frame
#define GRADUAL_MEDIUM_SCORE_TH 0.002
// assumes that stride doesn't overflow
BitmapGradualType bitmap_get_graduality_level(SpiceBitmap *bitmap)
{
double score = 0.0;
int num_samples = 0;
int num_lines;
double chunk_score = 0.0;
int chunk_num_samples = 0;
uint32_t x, i;
SpiceChunk *chunk;
chunk = bitmap->data->chunk;
for (i = 0; i < bitmap->data->num_chunks; i++) {
num_lines = chunk[i].len / bitmap->stride;
x = bitmap->x;
switch (bitmap->format) {
case SPICE_BITMAP_FMT_16BIT:
compute_lines_gradual_score_rgb16((rgb16_pixel_t *)chunk[i].data, x, num_lines,
&chunk_score, &chunk_num_samples);
break;
case SPICE_BITMAP_FMT_24BIT:
compute_lines_gradual_score_rgb24((rgb24_pixel_t *)chunk[i].data, x, num_lines,
&chunk_score, &chunk_num_samples);
break;
case SPICE_BITMAP_FMT_32BIT:
case SPICE_BITMAP_FMT_RGBA:
compute_lines_gradual_score_rgb32((rgb32_pixel_t *)chunk[i].data, x, num_lines,
&chunk_score, &chunk_num_samples);
break;
default:
spice_error("invalid bitmap format (not RGB) %u", bitmap->format);
}
score += chunk_score;
num_samples += chunk_num_samples;
}
spice_assert(num_samples);
score /= num_samples;
if (bitmap->format == SPICE_BITMAP_FMT_16BIT) {
if (score < GRADUAL_HIGH_RGB16_TH) {
return BITMAP_GRADUAL_HIGH;
}
} else {
if (score < GRADUAL_HIGH_RGB24_TH) {
return BITMAP_GRADUAL_HIGH;
}
}
if (score < GRADUAL_MEDIUM_SCORE_TH) {
return BITMAP_GRADUAL_MEDIUM;
} else {
return BITMAP_GRADUAL_LOW;
}
}
int bitmap_has_extra_stride(SpiceBitmap *bitmap)
{
spice_assert(bitmap);
if (bitmap_fmt_is_rgb(bitmap->format)) {
return ((bitmap->x * bitmap_fmt_get_bytes_per_pixel(bitmap->format)) < bitmap->stride);
} else {
switch (bitmap->format) {
case SPICE_BITMAP_FMT_8BIT:
return (bitmap->x < bitmap->stride);
case SPICE_BITMAP_FMT_4BIT_BE:
case SPICE_BITMAP_FMT_4BIT_LE: {
int bytes_width = SPICE_ALIGN(bitmap->x, 2) >> 1;
return bytes_width < bitmap->stride;
}
case SPICE_BITMAP_FMT_1BIT_BE:
case SPICE_BITMAP_FMT_1BIT_LE: {
int bytes_width = SPICE_ALIGN(bitmap->x, 8) >> 3;
return bytes_width < bitmap->stride;
}
default:
spice_error("invalid image type %u", bitmap->format);
return 0;
}
}
return 0;
}
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