+++ /dev/null
-/*
- * Copyright (C) 20019 - The Geeqie Team
- *
- * Author: Colin Clark
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- *
- * Derived from:
- *
- * GdkPixbuf library - PSD image loader
- *
- * Copyright (C) 2008 Jan Dudek
- *
- * Authors: Jan Dudek <jd@jandudek.com>
- *
- * 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 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
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/*
- * TODO
- * - report errors from parse_psd_header
- * - other color modes (CMYK at least)
- * - i18n
- */
-
-#include "main.h"
-
-#include "image-load.h"
-#include "image_load_psd.h"
-
-typedef struct _ImageLoaderPSD ImageLoaderPSD;
-struct _ImageLoaderPSD {
- ImageLoaderBackendCbAreaUpdated area_updated_cb;
- ImageLoaderBackendCbSize size_cb;
- ImageLoaderBackendCbAreaPrepared area_prepared_cb;
- gpointer data;
- GdkPixbuf *pixbuf;
- guint requested_width;
- guint requested_height;
- gboolean abort;
-};
-
-typedef struct
-{
- guchar signature[4]; /* file ID, always "8BPS" */
- guint16 version; /* version number, always 1 */
- guchar resetved[6];
- guint16 channels; /* number of color channels (1-24) */
- guint32 rows; /* height of image in pixels (1-30000) */
- guint32 columns; /* width of image in pixels (1-30000) */
- guint16 depth; /* number of bits per channel (1, 8, 16 or 32) */
- guint16 color_mode; /* color mode as defined below */
-} PsdHeader;
-
-#define PSD_HEADER_SIZE 26
-
-typedef enum
-{
- PSD_MODE_MONO = 0,
- PSD_MODE_GRAYSCALE = 1,
- PSD_MODE_INDEXED = 2,
- PSD_MODE_RGB = 3,
- PSD_MODE_CMYK = 4,
- PSD_MODE_MULTICHANNEL = 7,
- PSD_MODE_DUOTONE = 8,
- PSD_MODE_LAB = 9,
-} PsdColorMode;
-
-typedef enum
-{
- PSD_COMPRESSION_NONE = 0,
- PSD_COMPRESSION_RLE = 1
-} PsdCompressionType;
-
-typedef enum
-{
- PSD_STATE_HEADER,
- PSD_STATE_COLOR_MODE_BLOCK,
- PSD_STATE_RESOURCES_BLOCK,
- PSD_STATE_LAYERS_BLOCK,
- PSD_STATE_COMPRESSION,
- PSD_STATE_LINES_LENGTHS,
- PSD_STATE_CHANNEL_DATA,
- PSD_STATE_DONE
-} PsdReadState;
-
-typedef struct
-{
- PsdReadState state;
-
- GdkPixbuf* pixbuf;
- gpointer user_data;
-
- guchar* buffer;
- guint bytes_read;
- guint32 bytes_to_skip;
- gboolean bytes_to_skip_known;
-
- guint32 width;
- guint32 height;
- guint16 channels;
- guint16 depth;
- guint16 depth_bytes;
- PsdColorMode color_mode;
- PsdCompressionType compression;
-
- guchar** ch_bufs; /* channels buffers */
- guint curr_ch; /* current channel */
- guint curr_row;
- guint pos;
- guint16* lines_lengths;
- gboolean finalized;
-} PsdContext;
-
-
-static guint16
-read_uint16 (guchar* buf)
-{
- return (buf[0] << 8) | buf[1];
-}
-
-static guint32
-read_uint32 (guchar* buf)
-{
- return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
-}
-
-
-/*
- * Parse Psdheader from buffer
- *
- * str is expected to be at least PSD_HEADER_SIZE long
- */
-static PsdHeader
-psd_parse_header (guchar* str)
-{
- PsdHeader hd;
-
- memcpy(hd.signature, str, 4);
- hd.version = read_uint16(str + 4);
- hd.channels = read_uint16(str + 12);
- hd.rows = read_uint32(str + 14);
- hd.columns = read_uint32(str + 18);
- hd.depth = read_uint16(str + 22);
- hd.color_mode = read_uint16(str + 24);
-
- return hd;
-}
-
-/*
- * Attempts to read bytes_needed bytes from data and stores them in buffer.
- *
- * Returns true if there were enough bytes and false otherwise
- * (which means we need to call feed_buffer again)
- */
-static gboolean
-feed_buffer (guchar* buffer,
- guint* bytes_read,
- const guchar** data,
- guint* size,
- guint bytes_needed)
-{
- guint how_many = bytes_needed - *bytes_read;
- if (how_many > *size) {
- how_many = *size;
- }
- memcpy(buffer + *bytes_read, *data, how_many);
- *bytes_read += how_many;
- *data += how_many;
- *size -= how_many;
- return (*bytes_read == bytes_needed);
-}
-
-/*
- * Attempts to read size of the block and then skip this block.
- *
- * Returns true when finishes consuming block data, otherwise false
- * (false means we need to call skip_block again)
- */
-static gboolean
-skip_block (PsdContext* context, const guchar** data, guint* size)
-{
- if (!context->bytes_to_skip_known) {
- context->bytes_read = 0;
- if (feed_buffer(context->buffer, &context->bytes_read, data, size, 4)) {
- context->bytes_to_skip = read_uint32(context->buffer);
- context->bytes_to_skip_known = TRUE;
- } else {
- return FALSE;
- }
- }
- if (*size < context->bytes_to_skip) {
- *data += *size;
- context->bytes_to_skip -= *size;
- *size = 0;
- return FALSE;
- } else {
- *size -= context->bytes_to_skip;
- *data += context->bytes_to_skip;
- return TRUE;
- }
-}
-
-/*
- * Decodes RLE-compressed data
- */
-static void
-decompress_line(const guchar* src, guint line_length, guchar* dest)
-{
- guint16 bytes_read = 0;
- int k;
- while (bytes_read < line_length) {
- gchar byte = src[bytes_read];
- ++bytes_read;
-
- if (byte == -128) {
- continue;
- } else if (byte > -1) {
- gint count = byte + 1;
-
- /* copy next count bytes */
- for (k = 0; k < count; ++k) {
- *dest = src[bytes_read];
- ++dest;
- ++bytes_read;
- }
- } else {
- gint count = -byte + 1;
-
- /* copy next byte count times */
- guchar next_byte = src[bytes_read];
- ++bytes_read;
- for (k = 0; k < count; ++k) {
- *dest = next_byte;
- ++dest;
- }
- }
- }
-}
-
-static void
-reset_context_buffer(PsdContext* ctx)
-{
- ctx->bytes_read = 0;
- ctx->bytes_to_skip = 0;
- ctx->bytes_to_skip_known = FALSE;
-}
-
-static void free_context(PsdContext *ctx)
-{
- g_free(ctx->buffer);
- g_free(ctx->lines_lengths);
- if (ctx->ch_bufs) {
- int i;
- for (i = 0; i < ctx->channels; i++) {
- g_free(ctx->ch_bufs[i]);
- }
- }
- g_free(ctx);
-}
-
-static gboolean image_loader_psd_load(gpointer loader, const guchar *buf, gsize count, GError **UNUSED(error))
-{
- ImageLoaderPSD *ld = (ImageLoaderPSD *) loader;
- PsdContext* ctx = g_new0(PsdContext, 1);
- guint i;
- guint32 j;
- guint size = count;
-
- ctx->state = PSD_STATE_HEADER;
-
- /* we'll allocate larger buffer once we know image size */
- ctx->buffer = g_malloc(PSD_HEADER_SIZE);
- reset_context_buffer(ctx);
-
- ctx->ch_bufs = NULL;
- ctx->curr_ch = 0;
- ctx->curr_row = 0;
- ctx->pos = 0;
- ctx->lines_lengths = NULL;
- ctx->finalized = FALSE;
-
- while (size > 0) {
- switch (ctx->state) {
- case PSD_STATE_HEADER:
- if (feed_buffer(
- ctx->buffer, &ctx->bytes_read,
- &buf, &size, PSD_HEADER_SIZE))
- {
- PsdHeader hd = psd_parse_header(ctx->buffer);
-
- ctx->width = hd.columns;
- ctx->height = hd.rows;
- ctx->channels = hd.channels;
- ctx->depth = hd.depth;
- ctx->depth_bytes = (ctx->depth/8 > 0 ? ctx->depth/8 : 1);
- ctx->color_mode = hd.color_mode;
-
- if (ctx->color_mode != PSD_MODE_RGB
- && ctx->color_mode != PSD_MODE_GRAYSCALE
- && ctx->color_mode != PSD_MODE_CMYK
- && ctx->color_mode != PSD_MODE_DUOTONE
- ) {
- log_printf("warning: psd - Unsupported color mode\n");
- free_context(ctx);
- return FALSE;
- }
-
- if (ctx->depth != 8 && ctx->depth != 16) {
- log_printf("warning: psd - Unsupported color depth\n");
- free_context(ctx);
- return FALSE;
- }
-
- /* we need buffer that can contain one channel data for one
- row in RLE compressed format. 2*width should be enough */
- g_free(ctx->buffer);
- ctx->buffer = g_malloc(ctx->width * 2 * ctx->depth_bytes);
-
- /* this will be needed for RLE decompression */
- ctx->lines_lengths =
- g_malloc(2 * ctx->channels * ctx->height);
-
- ctx->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB,
- FALSE, 8, ctx->width, ctx->height);
-
- if (ctx->lines_lengths == NULL || ctx->buffer == NULL ||
- ctx->pixbuf == NULL)
- {
- log_printf("warning: Insufficient memory to load PSD image file\n");
- free_context(ctx);
- return FALSE;
- }
-
- /* create separate buffers for each channel */
- ctx->ch_bufs = g_malloc(sizeof(guchar*) * ctx->channels);
- for (i = 0; i < ctx->channels; i++) {
- ctx->ch_bufs[i] =
- g_malloc(ctx->width*ctx->height*ctx->depth_bytes);
-
- if (ctx->ch_bufs[i] == NULL) {
- log_printf("warning: Insufficient memory to load PSD image file\n");
- free_context(ctx);
- return FALSE;
- }
- }
-
- ctx->state = PSD_STATE_COLOR_MODE_BLOCK;
- reset_context_buffer(ctx);
- }
- break;
- case PSD_STATE_COLOR_MODE_BLOCK:
- if (skip_block(ctx, &buf, &size)) {
- ctx->state = PSD_STATE_RESOURCES_BLOCK;
- reset_context_buffer(ctx);
- }
- break;
- case PSD_STATE_RESOURCES_BLOCK:
- if (skip_block(ctx, &buf, &size)) {
- ctx->state = PSD_STATE_LAYERS_BLOCK;
- reset_context_buffer(ctx);
- }
- break;
- case PSD_STATE_LAYERS_BLOCK:
- if (skip_block(ctx, &buf, &size)) {
- ctx->state = PSD_STATE_COMPRESSION;
- reset_context_buffer(ctx);
- }
- break;
- case PSD_STATE_COMPRESSION:
- if (feed_buffer(ctx->buffer, &ctx->bytes_read, &buf, &size, 2))
- {
- ctx->compression = read_uint16(ctx->buffer);
-
- if (ctx->compression == PSD_COMPRESSION_RLE) {
- ctx->state = PSD_STATE_LINES_LENGTHS;
- reset_context_buffer(ctx);
- } else if (ctx->compression == PSD_COMPRESSION_NONE) {
- ctx->state = PSD_STATE_CHANNEL_DATA;
- reset_context_buffer(ctx);
- } else {
- log_printf("warning: psd - Unsupported compression type\n");
- return FALSE;
- }
- }
- break;
- case PSD_STATE_LINES_LENGTHS:
- if (feed_buffer(
- (guchar*) ctx->lines_lengths, &ctx->bytes_read, &buf,
- &size, 2 * ctx->height * ctx->channels))
- {
- /* convert from different endianness */
- for (i = 0; i < ctx->height * ctx->channels; i++) {
- ctx->lines_lengths[i] = read_uint16(
- (guchar*) &ctx->lines_lengths[i]);
- }
- ctx->state = PSD_STATE_CHANNEL_DATA;
- reset_context_buffer(ctx);
- }
- break;
- case PSD_STATE_CHANNEL_DATA:
- {
- guint line_length = ctx->width * ctx->depth_bytes;
- if (ctx->compression == PSD_COMPRESSION_RLE) {
- line_length = ctx->lines_lengths[
- ctx->curr_ch * ctx->height + ctx->curr_row];
- }
-
- if (feed_buffer(ctx->buffer, &ctx->bytes_read, &buf, &size,
- line_length))
- {
- if (ctx->compression == PSD_COMPRESSION_RLE) {
- decompress_line(ctx->buffer, line_length,
- ctx->ch_bufs[ctx->curr_ch] + ctx->pos
- );
- } else {
- memcpy(ctx->ch_bufs[ctx->curr_ch] + ctx->pos,
- ctx->buffer, line_length);
- }
-
- ctx->pos += ctx->width * ctx->depth_bytes;
- ++ctx->curr_row;
-
- if (ctx->curr_row >= ctx->height) {
- ++ctx->curr_ch;
- ctx->curr_row = 0;
- ctx->pos = 0;
- if (ctx->curr_ch >= ctx->channels) {
- ctx->state = PSD_STATE_DONE;
- }
- }
-
- reset_context_buffer(ctx);
- }
- }
- break;
- case PSD_STATE_DONE:
- default:
- size = 0;
- break;
- }
- }
-
- if (ctx->state == PSD_STATE_DONE && !ctx->finalized) {
- /* convert or copy channel buffers to our GdkPixbuf */
- guchar* pixels = gdk_pixbuf_get_pixels(ctx->pixbuf);
- guint b = ctx->depth_bytes;
-
- if (ctx->color_mode == PSD_MODE_RGB) {
- for (i = 0; i < ctx->height; i++) {
- for (j = 0; j < ctx->width; j++) {
- pixels[3*j+0] = ctx->ch_bufs[0][ctx->width*i*b + j*b];
- pixels[3*j+1] = ctx->ch_bufs[1][ctx->width*i*b + j*b];
- pixels[3*j+2] = ctx->ch_bufs[2][ctx->width*i*b + j*b];
- }
- pixels += gdk_pixbuf_get_rowstride(ctx->pixbuf);
- }
- } else if (ctx->color_mode == PSD_MODE_GRAYSCALE ||
- ctx->color_mode == PSD_MODE_DUOTONE)
- {
- for (i = 0; i < ctx->height; i++) {
- for (j = 0; j < ctx->width; j++) {
- pixels[3*j+0] = pixels[3*j+1] = pixels[3*j+2] =
- ctx->ch_bufs[0][ctx->width*i*b + j*b];
- }
- pixels += gdk_pixbuf_get_rowstride(ctx->pixbuf);
- }
- } else if (ctx->color_mode == PSD_MODE_CMYK) {
- /* unfortunately, this doesn't work 100% correctly...
- CMYK-RGB conversion distorts colors significantly */
-
- guchar* pixels = gdk_pixbuf_get_pixels(ctx->pixbuf);
- for (i = 0; i < ctx->height; i++) {
- for (j = 0; j < ctx->width; j++) {
- double c = 1.0 -
- (double) ctx->ch_bufs[0][ctx->width*i + j] / 255.0;
- double m = 1.0 -
- (double) ctx->ch_bufs[1][ctx->width*i + j] / 255.0;
- double y = 1.0 -
- (double) ctx->ch_bufs[2][ctx->width*i + j] / 255.0;
- double k = 1.0 -
- (double) ctx->ch_bufs[3][ctx->width*i + j] / 255.0;
-
- pixels[3*j+0] = (1.0 - (c * (1.0 - k) + k)) * 255.0;
- pixels[3*j+1] = (1.0 - (m * (1.0 - k) + k)) * 255.0;
- pixels[3*j+2] = (1.0 - (y * (1.0 - k) + k)) * 255.0;
- }
- pixels += gdk_pixbuf_get_rowstride(ctx->pixbuf);
- }
- }
- ctx->finalized = TRUE;
- ld->pixbuf = ctx->pixbuf;
- ld->area_updated_cb(loader, 0, 0, ctx->width, ctx->height, ld->data);
- free_context(ctx);
-
- return TRUE;
- }
-
- free_context(ctx);
- return FALSE;
-}
-
-/* ------- Geeqie ------------ */
-
-static gpointer image_loader_psd_new(ImageLoaderBackendCbAreaUpdated area_updated_cb, ImageLoaderBackendCbSize size_cb, ImageLoaderBackendCbAreaPrepared area_prepared_cb, gpointer data)
-{
- ImageLoaderPSD *loader = g_new0(ImageLoaderPSD, 1);
- loader->area_updated_cb = area_updated_cb;
- loader->size_cb = size_cb;
- loader->area_prepared_cb = area_prepared_cb;
- loader->data = data;
- return (gpointer) loader;
-}
-
-static void image_loader_psd_set_size(gpointer loader, int width, int height)
-{
- ImageLoaderPSD *ld = (ImageLoaderPSD *) loader;
- ld->requested_width = width;
- ld->requested_height = height;
-}
-
-static GdkPixbuf* image_loader_psd_get_pixbuf(gpointer loader)
-{
- ImageLoaderPSD *ld = (ImageLoaderPSD *) loader;
- return ld->pixbuf;
-}
-
-static gchar* image_loader_psd_get_format_name(gpointer UNUSED(loader))
-{
- return g_strdup("psd");
-}
-
-static gchar** image_loader_psd_get_format_mime_types(gpointer UNUSED(loader))
-{
- static gchar *mime[] = {"application/psd", NULL};
- return g_strdupv(mime);
-}
-
-static gboolean image_loader_psd_close(gpointer UNUSED(loader), GError **UNUSED(error))
-{
- return TRUE;
-}
-
-static void image_loader_psd_abort(gpointer loader)
-{
- ImageLoaderPSD *ld = (ImageLoaderPSD *) loader;
- ld->abort = TRUE;
-}
-
-static void image_loader_psd_free(gpointer loader)
-{
- ImageLoaderPSD *ld = (ImageLoaderPSD *) loader;
- if (ld->pixbuf) g_object_unref(ld->pixbuf);
- g_free(ld);
-}
-
-void image_loader_backend_set_psd(ImageLoaderBackend *funcs)
-{
- funcs->loader_new = image_loader_psd_new;
- funcs->set_size = image_loader_psd_set_size;
- funcs->load = image_loader_psd_load;
- funcs->write = NULL;
- funcs->get_pixbuf = image_loader_psd_get_pixbuf;
- funcs->close = image_loader_psd_close;
- funcs->abort = image_loader_psd_abort;
- funcs->free = image_loader_psd_free;
- funcs->get_format_name = image_loader_psd_get_format_name;
- funcs->get_format_mime_types = image_loader_psd_get_format_mime_types;
-}
-/* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */
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