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Diffstat (limited to 'src/cairo_png_surface.c')
| -rw-r--r-- | src/cairo_png_surface.c | 425 |
1 files changed, 0 insertions, 425 deletions
diff --git a/src/cairo_png_surface.c b/src/cairo_png_surface.c deleted file mode 100644 index 1ae745cb5..000000000 --- a/src/cairo_png_surface.c +++ /dev/null @@ -1,425 +0,0 @@ -/* cairo - a vector graphics library with display and print output - * - * Copyright © 2004 University of Southern California - * - * This library is free software; you can redistribute it and/or - * modify it either under the terms of the GNU Lesser General Public - * License version 2.1 as published by the Free Software Foundation - * (the "LGPL") or, at your option, under the terms of the Mozilla - * Public License Version 1.1 (the "MPL"). If you do not alter this - * notice, a recipient may use your version of this file under either - * the MPL or the LGPL. - * - * You should have received a copy of the LGPL along with this library - * in the file COPYING-LGPL-2.1; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * You should have received a copy of the MPL along with this library - * in the file COPYING-MPL-1.1 - * - * The contents of this file are subject to the Mozilla Public License - * Version 1.1 (the "License"); you may not use this file except in - * compliance with the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY - * OF ANY KIND, either express or implied. See the LGPL or the MPL for - * the specific language governing rights and limitations. - * - * The Original Code is the cairo graphics library. - * - * The Initial Developer of the Original Code is University of Southern - * California. - * - * Contributor(s): - * Olivier Andrieu <oliv__a@users.sourceforge.net> - * Carl D. Worth <cworth@cworth.org> - */ - -#include <png.h> - -#include "cairoint.h" -#include "cairo-png.h" - -static const cairo_surface_backend_t cairo_png_surface_backend; - -static cairo_int_status_t -_cairo_png_surface_copy_page (void *abstract_surface); - -void -cairo_set_target_png (cairo_t *cr, - FILE *file, - cairo_format_t format, - int width, - int height) -{ - cairo_surface_t *surface; - - surface = cairo_png_surface_create (file, format, - width, height); - - if (surface == NULL) { - cr->status = CAIRO_STATUS_NO_MEMORY; - return; - } - - cairo_set_target_surface (cr, surface); - - /* cairo_set_target_surface takes a reference, so we must destroy ours */ - cairo_surface_destroy (surface); -} - -typedef struct cairo_png_surface { - cairo_surface_t base; - - /* PNG-specific fields */ - cairo_image_surface_t *image; - FILE *file; - int copied; - - cairo_format_t format; - -} cairo_png_surface_t; - - -static void -_cairo_png_surface_erase (cairo_png_surface_t *surface); - -cairo_surface_t * -cairo_png_surface_create (FILE *file, - cairo_format_t format, - int width, - int height) -{ - cairo_png_surface_t *surface; - - surface = malloc (sizeof (cairo_png_surface_t)); - if (surface == NULL) - return NULL; - - _cairo_surface_init (&surface->base, &cairo_png_surface_backend); - - surface->image = (cairo_image_surface_t *) - cairo_image_surface_create (format, width, height); - - if (surface->image == NULL) { - free (surface); - return NULL; - } - - _cairo_png_surface_erase (surface); - - surface->file = file; - surface->copied = 0; - - surface->format = format; - - return &surface->base; -} - - -static cairo_surface_t * -_cairo_png_surface_create_similar (void *abstract_src, - cairo_format_t format, - int drawable, - int width, - int height) -{ - return NULL; -} - -static void -unpremultiply_data (png_structp png, png_row_infop row_info, png_bytep data) -{ - int i; - - for (i = 0; i < row_info->rowbytes; i += 4) { - unsigned char *b = &data[i]; - unsigned int pixel; - unsigned char alpha; - - memcpy (&pixel, b, sizeof (unsigned int)); - alpha = (pixel & 0xff000000) >> 24; - if (alpha == 0) { - b[0] = b[1] = b[2] = b[3] = 0; - } else { - b[0] = (((pixel & 0x0000ff) >> 0) * 255) / alpha; - b[1] = (((pixel & 0x00ff00) >> 8) * 255) / alpha; - b[2] = (((pixel & 0xff0000) >> 16) * 255) / alpha; - b[3] = alpha; - } - } -} - -static void -_cairo_png_surface_destroy (void *abstract_surface) -{ - cairo_png_surface_t *surface = abstract_surface; - - if (! surface->copied) - _cairo_png_surface_copy_page (surface); - - cairo_surface_destroy (&surface->image->base); - - free (surface); -} - -static void -_cairo_png_surface_erase (cairo_png_surface_t *surface) -{ - cairo_color_t transparent; - - _cairo_color_init (&transparent); - _cairo_color_set_rgb (&transparent, 0., 0., 0.); - _cairo_color_set_alpha (&transparent, 0.); - _cairo_surface_fill_rectangle (&surface->image->base, - CAIRO_OPERATOR_SRC, - &transparent, - 0, 0, - surface->image->width, - surface->image->height); -} - -static double -_cairo_png_surface_pixels_per_inch (void *abstract_surface) -{ - return 96.0; -} - -static cairo_status_t -_cairo_png_surface_acquire_source_image (void *abstract_surface, - cairo_image_surface_t **image_out, - void **image_extra) -{ - cairo_png_surface_t *surface = abstract_surface; - - *image_out = surface->image; - - return CAIRO_STATUS_SUCCESS; -} - -static void -_cairo_png_surface_release_source_image (void *abstract_surface, - cairo_image_surface_t *image, - void *image_extra) -{ -} - -static cairo_status_t -_cairo_png_surface_acquire_dest_image (void *abstract_surface, - cairo_rectangle_t *interest_rect, - cairo_image_surface_t **image_out, - cairo_rectangle_t *image_rect, - void **image_extra) -{ - cairo_png_surface_t *surface = abstract_surface; - - image_rect->x = 0; - image_rect->y = 0; - image_rect->width = surface->image->width; - image_rect->height = surface->image->height; - - *image_out = surface->image; - - return CAIRO_STATUS_SUCCESS; -} - -static void -_cairo_png_surface_release_dest_image (void *abstract_surface, - cairo_rectangle_t *interest_rect, - cairo_image_surface_t *image, - cairo_rectangle_t *image_rect, - void *image_extra) -{ -} - -static cairo_status_t -_cairo_png_surface_clone_similar (void *abstract_surface, - cairo_surface_t *src, - cairo_surface_t **clone_out) -{ - return CAIRO_INT_STATUS_UNSUPPORTED; -} - -static cairo_int_status_t -_cairo_png_surface_composite (cairo_operator_t operator, - cairo_pattern_t *src, - cairo_pattern_t *mask, - void *abstract_dst, - int src_x, - int src_y, - int mask_x, - int mask_y, - int dst_x, - int dst_y, - unsigned int width, - unsigned int height) -{ - return CAIRO_INT_STATUS_UNSUPPORTED; -} - -static cairo_int_status_t -_cairo_png_surface_fill_rectangles (void *abstract_surface, - cairo_operator_t operator, - const cairo_color_t *color, - cairo_rectangle_t *rects, - int num_rects) -{ - return CAIRO_INT_STATUS_UNSUPPORTED; -} - -static cairo_int_status_t -_cairo_png_surface_composite_trapezoids (cairo_operator_t operator, - cairo_pattern_t *pattern, - void *abstract_dst, - int src_x, - int src_y, - int dst_x, - int dst_y, - unsigned int width, - unsigned int height, - cairo_trapezoid_t *traps, - int num_traps) -{ - return CAIRO_INT_STATUS_UNSUPPORTED; -} - -static cairo_int_status_t -_cairo_png_surface_copy_page (void *abstract_surface) -{ - int i; - cairo_status_t status = CAIRO_STATUS_SUCCESS; - cairo_png_surface_t *surface = abstract_surface; - png_struct *png; - png_info *info; - png_byte **rows; - png_color_16 white; - int png_color_type; - int depth; - - rows = malloc (surface->image->height * sizeof(png_byte*)); - if (rows == NULL) - return CAIRO_STATUS_NO_MEMORY; - - for (i = 0; i < surface->image->height; i++) - rows[i] = surface->image->data + i * surface->image->stride; - - png = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); - if (png == NULL) { - status = CAIRO_STATUS_NO_MEMORY; - goto BAIL1; - } - - info = png_create_info_struct (png); - if (info == NULL) { - status = CAIRO_STATUS_NO_MEMORY; - goto BAIL2; - } - - if (setjmp (png_jmpbuf (png))) { - status = CAIRO_STATUS_NO_MEMORY; - goto BAIL2; - } - - png_init_io (png, surface->file); - - switch (surface->format) { - case CAIRO_FORMAT_ARGB32: - depth = 8; - png_color_type = PNG_COLOR_TYPE_RGB_ALPHA; - break; - case CAIRO_FORMAT_RGB24: - depth = 8; - png_color_type = PNG_COLOR_TYPE_RGB; - break; - case CAIRO_FORMAT_A8: - depth = 8; - png_color_type = PNG_COLOR_TYPE_GRAY; - break; - case CAIRO_FORMAT_A1: - depth = 1; - png_color_type = PNG_COLOR_TYPE_GRAY; - break; - default: - status = CAIRO_STATUS_NULL_POINTER; - goto BAIL2; - } - - png_set_IHDR (png, info, - surface->image->width, - surface->image->height, depth, - png_color_type, - PNG_INTERLACE_NONE, - PNG_COMPRESSION_TYPE_DEFAULT, - PNG_FILTER_TYPE_DEFAULT); - - white.red = 0xff; - white.blue = 0xff; - white.green = 0xff; - png_set_bKGD (png, info, &white); - -/* XXX: Setting the time is interfereing with the image comparison - png_convert_from_time_t (&png_time, time (NULL)); - png_set_tIME (png, info, &png_time); -*/ - - png_set_write_user_transform_fn (png, unpremultiply_data); - if (surface->format == CAIRO_FORMAT_ARGB32 || surface->format == CAIRO_FORMAT_RGB24) - png_set_bgr (png); - if (surface->format == CAIRO_FORMAT_RGB24) - png_set_filler (png, 0, PNG_FILLER_AFTER); - - png_write_info (png, info); - png_write_image (png, rows); - png_write_end (png, info); - - surface->copied = 1; - -BAIL2: - png_destroy_write_struct (&png, &info); -BAIL1: - free (rows); - - return status; -} - -static cairo_int_status_t -_cairo_png_surface_show_page (void *abstract_surface) -{ - cairo_int_status_t status; - cairo_png_surface_t *surface = abstract_surface; - - status = _cairo_png_surface_copy_page (surface); - if (status) - return status; - - _cairo_png_surface_erase (surface); - - return CAIRO_STATUS_SUCCESS; -} - -static cairo_int_status_t -_cairo_png_surface_set_clip_region (void *abstract_surface, - pixman_region16_t *region) -{ - cairo_png_surface_t *surface = abstract_surface; - - return _cairo_image_surface_set_clip_region (surface->image, region); -} - -static const cairo_surface_backend_t cairo_png_surface_backend = { - _cairo_png_surface_create_similar, - _cairo_png_surface_destroy, - _cairo_png_surface_pixels_per_inch, - _cairo_png_surface_acquire_source_image, - _cairo_png_surface_release_source_image, - _cairo_png_surface_acquire_dest_image, - _cairo_png_surface_release_dest_image, - _cairo_png_surface_clone_similar, - _cairo_png_surface_composite, - _cairo_png_surface_fill_rectangles, - _cairo_png_surface_composite_trapezoids, - _cairo_png_surface_copy_page, - _cairo_png_surface_show_page, - _cairo_png_surface_set_clip_region, - NULL /* show_glyphs */ -}; 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