server: move bitmap related to spice-bitmap-utils

Also remove some unused function parameters from
bitmap_get_graduality_level()

Acked-by: Jonathon Jongsma <jjongsma@redhat.com>

1 files changed, 119 insertions, 0 deletions

diff --git a/server/spice-bitmap-utils.c b/server/spice-bitmap-utils.c
new file mode 100644
index 00000000..c4ec625a
--- /dev/null
+++ b/server/spice-bitmap-utils.c
@@ -0,0 +1,119 @@
+/* -*- 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;
+}