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/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2009 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/>.
*/
#include <config.h>
#include "canvas_utils.h"
#include "mem.h"
typedef struct PixmanData {
uint8_t *data;
pixman_format_code_t format;
} PixmanData;
static void release_data(SPICE_GNUC_UNUSED pixman_image_t *image,
void *release_data)
{
PixmanData *data = (PixmanData *)release_data;
free(data->data);
free(data);
}
static PixmanData *
pixman_image_add_data(pixman_image_t *image)
{
PixmanData *data;
data = (PixmanData *)pixman_image_get_destroy_data(image);
if (data == NULL) {
data = (PixmanData *)calloc(1, sizeof(PixmanData));
if (data == NULL) {
spice_error("out of memory");
}
pixman_image_set_destroy_function(image,
release_data,
data);
}
return data;
}
void
spice_pixman_image_set_format(pixman_image_t *image,
pixman_format_code_t format)
{
PixmanData *data;
data = pixman_image_add_data(image);
data->format = format;
}
int spice_pixman_image_get_format(pixman_image_t *image, pixman_format_code_t *format)
{
PixmanData *data;
spice_return_val_if_fail(format != NULL, 0);
data = (PixmanData *)pixman_image_get_destroy_data(image);
if (data != NULL && data->format != 0) {
*format = data->format;
return 1;
}
spice_warn_if_reached();
return 0;
}
pixman_image_t *surface_create_stride(pixman_format_code_t format, int width, int height,
int stride)
{
uint8_t *data;
uint8_t *stride_data;
pixman_image_t *surface;
PixmanData *pixman_data;
data = (uint8_t *)spice_malloc_n(abs(stride), height);
if (stride < 0) {
stride_data = data + (-stride) * (height - 1);
} else {
stride_data = data;
}
surface = pixman_image_create_bits(format, width, height, (uint32_t *)stride_data, stride);
if (surface == NULL) {
free(data);
data = NULL;
spice_error("create surface failed, out of memory");
}
pixman_data = pixman_image_add_data(surface);
pixman_data->data = data;
pixman_data->format = format;
return surface;
}
pixman_image_t * surface_create(pixman_format_code_t format, int width, int height, int top_down)
{
if (top_down) {
pixman_image_t *surface;
PixmanData *data;
surface = pixman_image_create_bits(format, width, height, NULL, 0);
data = pixman_image_add_data(surface);
data->format = format;
return surface;
} else {
// NOTE: we assume here that the lz decoders always decode to RGB32.
int stride = 0;
switch (format) {
case PIXMAN_a8r8g8b8:
case PIXMAN_x8r8g8b8:
#ifdef WORDS_BIGENDIAN
case PIXMAN_b8g8r8a8:
case PIXMAN_b8g8r8x8:
#endif
stride = width * 4;
break;
case PIXMAN_r8g8b8:
#ifdef WORDS_BIGENDIAN
case PIXMAN_b8g8r8:
#endif
// NOTE: LZ4 also decodes to RGB24
stride = SPICE_ALIGN(width * 3, 4);
break;
case PIXMAN_x1r5g5b5:
case PIXMAN_r5g6b5:
stride = SPICE_ALIGN(width * 2, 4);
break;
case PIXMAN_a8:
stride = SPICE_ALIGN(width, 4);
break;
case PIXMAN_a1:
stride = SPICE_ALIGN(width, 32) / 8;
break;
default:
spice_error("invalid format");
}
stride = -stride;
return surface_create_stride(format, width, height, stride);
}
}
pixman_image_t *alloc_lz_image_surface(LzDecodeUsrData *canvas_data,
pixman_format_code_t pixman_format, int width,
int height, int gross_pixels, int top_down)
{
int stride;
pixman_image_t *surface = NULL;
stride = (gross_pixels / height) * (PIXMAN_FORMAT_BPP (pixman_format) / 8);
/* pixman requires strides to be 4-byte aligned */
stride = SPICE_ALIGN(stride, 4);
if (!top_down) {
stride = -stride;
}
surface = surface_create_stride(pixman_format, width, height, stride);
canvas_data->out_surface = surface;
return surface;
}
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