~ubuntu-branches/ubuntu/trusty/libmatchbox/trusty : revision 14

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/* mbpixbuf.c libmb

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*

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*

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* This library is free software; you can redistribute it and/or

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* modify it under the terms of the GNU Lesser General Public

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* License as published by the Free Software Foundation; either

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* version 2 of the License, or (at your option) any later version.

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*

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* This library is distributed in the hope that it will be useful,

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* but WITHOUT ANY WARRANTY; without even the implied warranty of

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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

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* Lesser General Public License for more details.

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*

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* You should have received a copy of the GNU Lesser General Public

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* License along with this library; if not, write to the

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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,

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* Boston, MA 02111-1307, USA.

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*/

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#define _GNU_SOURCE

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#include <strings.h>

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#include "mbpixbuf.h"

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#define BYTE_ORD_24_RGB 0

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#define BYTE_ORD_24_RBG 1

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#define BYTE_ORD_24_BRG 2

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#define BYTE_ORD_24_BGR 3

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#define BYTE_ORD_24_GRB 4

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#define BYTE_ORD_24_GBR 5

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#define BYTE_ORD_32_ARGB 6

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#define alpha_composite(composite, fg, alpha, bg) { \

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ush temp; \

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if ((alpha) == 0) \

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(composite) = (bg); \

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else if ((alpha) == 255) \

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(composite) = (fg); \

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else { \

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temp = ((ush)(fg)*(ush)(alpha) + \

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(ush)(bg)*(ush)(255 - (ush)(alpha)) + (ush)128); \

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(composite) = (ush)((temp + (temp >> 8)) >> 8); } \

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}

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#ifdef WORDS_BIGENDIAN

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#define SHORT_FROM_2BYTES(p) ( *(p+1) | (*(p) << 8) )

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#define 2BYTES_FROM_SHORT(p,s) \

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*((p)+1) = (unsigned char) s; \

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*(p) = (unsigned char) ((s >> 8) & 0xff);

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#else

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#define SHORT_FROM_2BYTES(p) ( *(p) | (*((p)+1) << 8) )

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#define BYTES_FROM_SHORT(p,s) \

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*(p) = (unsigned char) s; \

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*((p)+1) = (unsigned char) ((s >> 8) & 0xff);

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#endif

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#define internal_16bpp_pixel_to_rgb(p,r,g,b) \

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{ \

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unsigned short s = SHORT_FROM_2BYTES(p); \

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(r) = (( s & 0xf800) >> 8); \

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(g) = (( s & 0x07e0) >> 3); \

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(b) = (( s & 0x001f) << 3); \

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}

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#define internal_rgb_to_16bpp_pixel(r,g,b,p) \

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{ \

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unsigned short s = ( (((b) >> 3) & 0x001f) | \

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(((g) << 3) & 0x07e0) | \

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(((r) << 8) & 0xf800) ); \

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BYTES_FROM_SHORT(p,s) \

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}

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#define internal_16bpp_pixel_next(p) \

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(p) += 2

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#define IN_REGION(x,y,w,h) ( (x) > -1 && (x) < (w) && (y) > -1 && (y) <(h) )

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typedef unsigned short ush;

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#ifdef USE_PNG

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static unsigned char*

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_load_png_file( const char *file,

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int *width, int *height, int *has_alpha );

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#endif

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#ifdef USE_JPG

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static unsigned char*

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_load_jpg_file( const char *file,

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int *width, int *height, int *has_alpha );

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#endif

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static int _mbpb_trapped_error_code = 0;

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static int (*_mbpb_old_error_handler) (Display *d, XErrorEvent *e);

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static int

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_mbpb_error_handler(Display *display,

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XErrorEvent *error)

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{

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_mbpb_trapped_error_code = error->error_code;

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return 0;

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}

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static void

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_mbpb_trap_errors(void)

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{

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_mbpb_trapped_error_code = 0;

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_mbpb_old_error_handler = XSetErrorHandler(_mbpb_error_handler);

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}

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static int

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_mbpb_untrap_errors(void)

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{

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XSetErrorHandler(_mbpb_old_error_handler);

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return _mbpb_trapped_error_code;

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}

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static int

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_paletteAlloc(MBPixbuf *pb);

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#ifdef USE_JPG

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struct my_error_mgr {

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struct jpeg_error_mgr pub; /* "public" fields */

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jmp_buf setjmp_buffer; /* for return to caller */

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};

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typedef struct my_error_mgr * my_error_ptr;

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void

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_jpeg_error_exit (j_common_ptr cinfo)

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{

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my_error_ptr myerr = (my_error_ptr) cinfo->err;

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(*cinfo->err->output_message) (cinfo);

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longjmp(myerr->setjmp_buffer, 1);

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}

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static unsigned char*

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_load_jpg_file( const char *file,

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int *width, int *height, int *has_alpha )

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{

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struct jpeg_decompress_struct cinfo;

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struct my_error_mgr jerr;

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FILE * infile; /* source file */

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JSAMPLE *buffer; /* Output row buffer */

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int row_stride; /* physical row width in output buffer */

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unsigned char *data = NULL;

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if ((infile = fopen(file, "rb")) == NULL) {

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if (mb_want_warnings())

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fprintf(stderr, "mbpixbuf: can't open %s\n", file);

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return NULL;

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}

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cinfo.err = jpeg_std_error(&jerr.pub);

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jerr.pub.error_exit = _jpeg_error_exit;

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if (setjmp(jerr.setjmp_buffer)) {

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jpeg_destroy_decompress(&cinfo);

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fclose(infile);

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return NULL;

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}

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jpeg_create_decompress(&cinfo);

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jpeg_stdio_src(&cinfo, infile);

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jpeg_read_header(&cinfo, TRUE);

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cinfo.do_fancy_upsampling = FALSE;

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cinfo.do_block_smoothing = FALSE;

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cinfo.out_color_space = JCS_RGB;

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cinfo.scale_num = 1;

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jpeg_start_decompress(&cinfo);

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if( cinfo.output_components != 3 )

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{

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if (mb_want_warnings())

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fprintf( stderr, "mbpixbuf: jpegs with %d channles not supported\n",

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cinfo.output_components );

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jpeg_finish_decompress(&cinfo);

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jpeg_destroy_decompress(&cinfo);

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return NULL;

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}

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*has_alpha = False;

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*width = cinfo.output_width;

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*height = cinfo.output_height;

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data = malloc(*width * *height * 3 );

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row_stride = cinfo.output_width * cinfo.output_components;

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buffer = malloc( sizeof(JSAMPLE)*row_stride );

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while (cinfo.output_scanline < cinfo.output_height) {

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jpeg_read_scanlines(&cinfo, &buffer, 1);

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memcpy( &data[ ( cinfo.output_scanline - 1 ) * row_stride ],

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buffer, row_stride );

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}

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jpeg_finish_decompress(&cinfo);

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jpeg_destroy_decompress(&cinfo);

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fclose(infile);

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if (buffer) free(buffer);

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return data;

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}

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#endif

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#ifdef USE_PNG

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static unsigned char*

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_load_png_file( const char *file,

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int *width, int *height, int *has_alpha ) {

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FILE *fd;

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unsigned char *data;

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unsigned char header[8];

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int bit_depth, color_type;

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png_uint_32 png_width, png_height, i, rowbytes;

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png_structp png_ptr;

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png_infop info_ptr;

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png_bytep *row_pointers;

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if ((fd = fopen( file, "rb" )) == NULL) return NULL;

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fread( header, 1, 8, fd );

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if ( ! png_check_sig( header, 8 ) )

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{

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fclose(fd);

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return NULL;

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}

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png_ptr = png_create_read_struct( PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);

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if ( ! png_ptr ) {

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fclose(fd);

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return NULL;

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}

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info_ptr = png_create_info_struct(png_ptr);

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if ( ! info_ptr ) {

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png_destroy_read_struct( &png_ptr, (png_infopp)NULL, (png_infopp)NULL);

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fclose(fd);

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return NULL;

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}

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#if PNG_LIBPNG_VER_MAJOR == 1 && PNG_LIBPNG_VER_MINOR >= 4

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if ( setjmp( png_jmpbuf ( png_ptr ) ) ) {

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#else

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if ( setjmp( png_ptr->jmpbuf ) ) {

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#endif

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png_destroy_read_struct( &png_ptr, &info_ptr, NULL);

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fclose(fd);

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return NULL;

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}

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png_init_io( png_ptr, fd );

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png_set_sig_bytes( png_ptr, 8);

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png_read_info( png_ptr, info_ptr);

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png_get_IHDR( png_ptr, info_ptr, &png_width, &png_height, &bit_depth,

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&color_type, NULL, NULL, NULL);

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*width = (int) png_width;

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*height = (int) png_height;

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if (( color_type == PNG_COLOR_TYPE_PALETTE )||

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( png_get_valid( png_ptr, info_ptr, PNG_INFO_tRNS )))

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png_set_expand(png_ptr);

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if (( color_type == PNG_COLOR_TYPE_GRAY )||

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( color_type == PNG_COLOR_TYPE_GRAY_ALPHA ))

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png_set_gray_to_rgb(png_ptr);

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if ( color_type == PNG_COLOR_TYPE_RGB_ALPHA

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|| color_type == PNG_COLOR_TYPE_GRAY_ALPHA

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)

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*has_alpha = 1;

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else

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*has_alpha = 0;

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/* 8 bits */

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if ( bit_depth == 16 )

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png_set_strip_16(png_ptr);

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if (bit_depth < 8)

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png_set_packing(png_ptr);

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/* not needed as data will be RGB not RGBA and have_alpha will reflect this

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png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);

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*/

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png_read_update_info( png_ptr, info_ptr);

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/* allocate space for data and row pointers */

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rowbytes = png_get_rowbytes( png_ptr, info_ptr);

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data = (unsigned char *) malloc( (rowbytes*(*height + 1)));

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row_pointers = (png_bytep *) malloc( (*height)*sizeof(png_bytep));

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if (( data == NULL )||( row_pointers == NULL )) {

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png_destroy_read_struct( &png_ptr, &info_ptr, NULL);

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free(data);

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free(row_pointers);

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return NULL;

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}

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for ( i = 0; i < *height; i++ )

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row_pointers[i] = data + i*rowbytes;

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png_read_image( png_ptr, row_pointers );

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png_read_end( png_ptr, NULL);

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free(row_pointers);

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png_destroy_read_struct( &png_ptr, &info_ptr, NULL);

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fclose(fd);

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return data;

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}

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#endif

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static unsigned char*

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_load_xpm_file( MBPixbuf *pb, const char *filename, int *w, int *h, int *has_alpha)

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{ /* This hell is adapted from imlib ;-) */

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FILE *file;

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struct _cmap

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{

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unsigned char str[6];

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unsigned char transp;

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short r, g, b;

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} *cmap = NULL;

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unsigned char *data = NULL, *ptr = NULL, *end = NULL;

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int pc, c = ' ', i = 0, j = 0, k = 0, ncolors = 0, cpp = 0,

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comment = 0, transp = 0, quote = 0, context = 0, len, done = 0;

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char *line, s[257], tok[128], col[256];

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XColor xcol;

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int lsz = 256;

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short lookup[128 - 32][128 - 32];

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if (!filename) return NULL;

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if ((file = fopen( filename, "rb" )) == NULL) return NULL;

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line = malloc(lsz);

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while (!done)

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{

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pc = c;

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c = fgetc(file);

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if (c == EOF)

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break;

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if (!quote)

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{

361

if ((pc == '/') && (c == '*'))

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comment = 1;

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else if ((pc == '*') && (c == '/') && (comment))

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comment = 0;

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}

366

if (!comment)

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{

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if ((!quote) && (c == '"'))

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{

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quote = 1;

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i = 0;

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}

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else if ((quote) && (c == '"'))

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{

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line[i] = 0;

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quote = 0;

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if (context == 0)

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{

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/* Header */

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sscanf(line, "%i %i %i %i", w, h, &ncolors, &cpp);

381

if (ncolors > 32766 || cpp > 5 || *w > 32767 || *h > 32767)

382

{

383

if (mb_want_warnings())

384

fprintf(stderr, "xpm file invalid");

385

fclose(file);

386

free(line);

387

fclose(file);

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return NULL;

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}

390

391

cmap = malloc(sizeof(struct _cmap) * ncolors);

392

393

if (!cmap)

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{

395

free(line);

396

fclose(file);

397

return NULL;

398

}

399

400

data = malloc(*w ** h * 4);

401

if (!data)

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{

403

free(cmap);

404

free(line);

405

fclose(file);

406

return NULL;

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}

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409

ptr = data;

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end = ptr + (*w ** h * 4);

411

j = 0;

412

context++;

413

}

414

else if (context == 1)

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{

416

/* Color Table */

417

if (j < ncolors)

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{

419

int slen;

420

int hascolor, iscolor;

421

422

iscolor = 0;

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hascolor = 0;

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tok[0] = 0;

425

col[0] = 0;

426

s[0] = 0;

427

len = strlen(line);

428

strncpy((char*)cmap[j].str, line, cpp);

429

cmap[j].str[cpp] = 0;

430

cmap[j].r = -1;

431

cmap[j].transp = 0;

432

for (k = cpp; k < len; k++)

433

{

434

if (line[k] != ' ')

435

{

436

s[0] = 0;

437

sscanf(&line[k], "%256s", s);

438

slen = strlen(s);

439

k += slen;

440

if (!strcmp(s, "c"))

441

iscolor = 1;

442

if ((!strcmp(s, "m")) || (!strcmp(s, "s")) ||

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(!strcmp(s, "g4")) || (!strcmp(s, "g")) ||

444

(!strcmp(s, "c")) || (k >= len))

445

{

446

if (k >= len)

447

{

448

if (col[0])

449

strcat(col, " ");

450

if (strlen(col) + strlen(s) < sizeof(col))

451

strcat(col, s);

452

}

453

if (col[0])

454

{

455

if (!strcasecmp(col, "none"))

456

{

457

transp = 1;

458

cmap[j].transp = 1;

459

}

460

else

461

{

462

if ((((cmap[j].r < 0) ||

463

(!strcmp(tok, "c"))) &&

464

(!hascolor)))

465

{

466

XParseColor(pb->dpy,

467

DefaultColormap(pb->dpy,

468

pb->scr),

469

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col, &xcol);

471

cmap[j].r = xcol.red >> 8;

472

cmap[j].g = xcol.green >> 8;

473

cmap[j].b = xcol.blue >> 8;

474

if ((cmap[j].r == 255) &&

475

(cmap[j].g == 0) &&

476

(cmap[j].b == 255))

477

cmap[j].r = 254;

478

if (iscolor)

479

hascolor = 1;

480

}

481

}

482

}

483

strcpy(tok, s);

484

col[0] = 0;

485

}

486

else

487

{

488

if (col[0])

489

strcat(col, " ");

490

strcat(col, s);

491

}

492

}

493

}

494

}

495

j++;

496

if (j >= ncolors)

497

{

498

if (cpp == 1)

499

for (i = 0; i < ncolors; i++)

500

lookup[(int)cmap[i].str[0] - 32][0] = i;

501

if (cpp == 2)

502

for (i = 0; i < ncolors; i++)

503

lookup[(int)cmap[i].str[0] - 32][(int)cmap[i].str[1] - 32] = i;

504

context++;

505

}

506

}

507

else

508

{

509

/* Image Data */

510

i = 0;

511

if (cpp == 1)

512

{

513

for (i = 0;

514

((i < 65536) && (ptr < end) && (line[i]));

515

i++)

516

{

517

col[0] = line[i];

518

if (transp &&

519

cmap[lookup[(int)col[0] - 32][0]].transp)

520

{

521

*ptr++ = 0; *ptr++ = 0; *ptr++ = 0; *ptr++ = 0;

522

}

523

else

524

{

525

int idx = lookup[(int)col[0] - 32][0];

526

*ptr++ = (unsigned char)cmap[idx].r;

527

*ptr++ = (unsigned char)cmap[idx].g;

528

*ptr++ = (unsigned char)cmap[idx].b;

529

if (transp) *ptr++ = 255;

530

}

531

}

532

}

533

else

534

{

535

for (i = 0;

536

((i < 65536) && (ptr < end) && (line[i]));

537

i++)

538

{

539

for (j = 0; j < cpp; j++, i++)

540

{

541

col[j] = line[i];

542

}

543

col[j] = 0;

544

i--;

545

for (j = 0; j < ncolors; j++)

546

{

547

if (!strcmp(col, (char*)cmap[j].str))

548

{

549

if (transp && cmap[j].transp)

550

{

551

*ptr++ = 0;

552

*ptr++ = 0;

553

*ptr++ = 0;

554

*ptr++ = 0;

555

}

556

else

557

{

558

*ptr++ = (unsigned char)cmap[j].r;

559

*ptr++ = (unsigned char)cmap[j].g;

560

*ptr++ = (unsigned char)cmap[j].b;

561

if (transp) *ptr++ = 255;

562

}

563

j = ncolors;

564

}

565

}

566

}

567

}

568

}

569

}

570

}

571

572

/* Scan in line from XPM file */

573

if ((!comment) && (quote) && (c != '"'))

574

{

575

if (c < 32)

576

c = 32;

577

else if (c > 127)

578

c = 127;

579

line[i++] = c;

580

}

581

if (i >= lsz)

582

{

583

lsz += 256;

584

line = realloc(line, lsz);

585

if(line == NULL)

586

{

587

free(cmap);

588

fclose(file);

589

return NULL;

590

}

591

}

592

593

if ((ptr) && ((ptr - data) >= *w ** h * 4))

594

done = 1;

595

}

596

597

if (transp)

598

*has_alpha = 1;

599

else

600

*has_alpha = 0;

601

602

free(cmap);

603

free(line);

604

605

fclose(file);

606

return data;

607

}

608

609

static int

610

_paletteAlloc(MBPixbuf *pb)

611

{

612

XColor xcl;

613

int colnum, i, j;

614

unsigned long used[256];

615

int num_used, is_used;

616

617

int num_of_cols = 1 << pb->depth;

618

int colors_per_channel = num_of_cols / 3;

619

620

if (pb->palette) free(pb->palette);

621

622

pb->palette = malloc(sizeof(MBPixbufColor) * num_of_cols);

623

624

num_used = 0;

625

colnum = 0;

626

627

switch(pb->vis->class)

628

{

629

case PseudoColor:

630

case StaticColor:

631

/*

632

for (r = 0, i = 0; r < colors_per_channel; r++)

633

for (g = 0; g < colors_per_channel; g++)

634

for (b = 0; b < colors_per_channel; b++, i++)

635

{

636

xcl.red = (r * 0xffff) / (colors_per_channel - 1);

637

xcl.green = (g * 0xffff) / (colors_per_channel - 1);

638

xcl.blue = (b * 0xffff) / (colors_per_channel - 1);

639

xcl.flags = DoRed | DoGreen | DoBlue;

640

641

*/

642

643

for (i = 0; i < num_of_cols; i++)

644

{ /* RRRGGGBB - TODO check for 4 bit col */

645

int ii = (i * 256)/num_of_cols;

646

xcl.red = (unsigned short)( ( ii & 0xe0 ) << 8 );

647

xcl.green = (unsigned short)(( ii & 0x1c ) << 11 );

648

xcl.blue = (unsigned short)( ( ii & 0x03 ) << 14 );

649

xcl.flags = DoRed | DoGreen | DoBlue;

650

651

if (!XAllocColor(pb->dpy, pb->root_cmap, &xcl))

652

{

653

if (mb_want_warnings())

654

printf("alloc color failed\n");

655

}

656

is_used = 0;

657

for (j = 0; j < num_used; j++)

658

{

659

if (xcl.pixel == used[j])

660

{

661

is_used = 1;

662

j = num_used;

663

}

664

}

665

if (!is_used)

666

{

667

pb->palette[colnum].r = xcl.red >> 8;

668

pb->palette[colnum].g = xcl.green >> 8;

669

pb->palette[colnum].b = xcl.blue >> 8;

670

pb->palette[colnum].pixel = xcl.pixel;

671

used[num_used++] = xcl.pixel;

672

colnum++;

673

}

674

else

675

xcl.pixel = 0;

676

}

677

break;

678

case GrayScale:

679

case StaticGray:

680

for(i = 0; i < num_of_cols; i++)

681

{

682

xcl.red = (i * 0xffff) / (colors_per_channel - 1);

683

xcl.green = (i * 0xffff) / (colors_per_channel - 1);

684

xcl.blue = (i * 0xffff) / (colors_per_channel - 1);

685

xcl.flags = DoRed | DoGreen | DoBlue;

686

687

if (!XAllocColor(pb->dpy, pb->root_cmap, &xcl))

688

{

689

if (mb_want_warnings())

690

fprintf(stderr, "libmb: alloc color failed\n");

691

}

692

is_used = 0;

693

for (j = 0; j < num_used; j++)

694

{

695

if (xcl.pixel == used[j])

696

{

697

is_used = 1;

698

j = num_used;

699

}

700

}

701

if (!is_used)

702

{

703

pb->palette[colnum].r = xcl.red >> 8;

704

pb->palette[colnum].g = xcl.green >> 8;

705

pb->palette[colnum].b = xcl.blue >> 8;

706

pb->palette[colnum].pixel = xcl.pixel;

707

used[num_used++] = xcl.pixel;

708

colnum++;

709

}

710

else

711

xcl.pixel = 0;

712

}

713

}

714

return colnum;

715

}

716

717

718

static unsigned long

719

mb_pixbuf_get_pixel(MBPixbuf *pb, int r, int g, int b, int a)

720

{

721

if (pb->depth > 8)

722

{

723

switch (pb->depth)

724

{

725

case 15:

726

return ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | ((b & 0xf8) >> 3);

727

case 16:

728

return ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | ((b & 0xf8) >> 3);

729

case 24:

730

case 32:

731

switch (pb->byte_order)

732

{

733

case BYTE_ORD_24_RGB:

734

return ((r & 0xff) << 16) | ((g & 0xff) << 8) | (b & 0xff);

735

case BYTE_ORD_24_RBG:

736

return ((r & 0xff) << 16) | ((b & 0xff) << 8) | (g & 0xff);

737

case BYTE_ORD_24_BRG:

738

return ((b & 0xff) << 16) | ((r & 0xff) << 8) | (g & 0xff);

739

case BYTE_ORD_24_BGR:

740

return ((b & 0xff) << 16) | ((g & 0xff) << 8) | (r & 0xff);

741

case BYTE_ORD_24_GRB:

742

return ((g & 0xff) << 16) | ((r & 0xff) << 8) | (b & 0xff);

743

case BYTE_ORD_24_GBR:

744

return ((g & 0xff) << 16) | ((b & 0xff) << 8) | (r & 0xff);

745

case BYTE_ORD_32_ARGB:

746

return (a << 24) | (r << 16) | (g << 8) | b;

747

default:

748

return 0;

749

}

750

default:

751

return 0;

752

}

753

return 0;

754

}

755

756

/* pb->depth <= 8 */

757

switch(pb->vis->class)

758

{

759

case PseudoColor:

760

case StaticColor:

761

{

762

int i;

763

int dif;

764

int dr, dg, db;

765

unsigned long col = 0;

766

int mindif = 0x7fffffff;

767

768

for (i = 0; i < pb->num_of_cols; i++)

769

{

770

dr = r - pb->palette[i].r;

771

if (dr < 0)

772

dr = -dr;

773

dg = g - pb->palette[i].g;

774

if (dg < 0)

775

dg = -dg;

776

db = b - pb->palette[i].b;

777

if (db < 0)

778

db = -db;

779

dif = dr + dg + db;

780

if (dif < mindif)

781

{

782

mindif = dif;

783

col = i;

784

}

785

}

786

return pb->palette[col].pixel;

787

}

788

case GrayScale:

789

case StaticGray:

790

return (((r * 77) + (g * 151) + (b * 28)) >> (16 - pb->depth));

791

#if 0

792

if ((r+g+b) == 765 ) return 0; /* HACK */

793

return (1 << pb->depth) - ((( ((r * 54) + (g * 183) + (b * 19)) / 256) * 0xffff )/ (1 << pb->depth)); /* TODO should be oxffffffff ?? */

794

#endif

795

default:

796

break;

797

}

798

return 0;

799

}

800

801

unsigned long

802

mb_pixbuf_lookup_x_pixel(MBPixbuf *pb, int r, int g, int b, int a)

803

{

804

return mb_pixbuf_get_pixel(pb, r, g, b, a);

805

}

806

807

808

MBPixbuf *

809

mb_pixbuf_new(Display *dpy, int scr)

810

{

811

return mb_pixbuf_new_extended(dpy,

812

scr,

813

DefaultVisual(dpy, scr),

814

DefaultDepth(dpy, scr));

815

}

816

817

818

void

819

mb_pixbuf_destroy(MBPixbuf *pb)

820

{

821

/* XXX Probably needs to free more here */

822

XFreeGC(pb->dpy, pb->gc);

823

free(pb);

824

}

825

826

MBPixbuf *

827

mb_pixbuf_new_extended(Display *dpy,

828

int scr,

829

Visual *vis,

830

int depth)

831

{

832

XGCValues gcv;

833

unsigned long rmsk, gmsk, bmsk;

834

MBPixbuf *pb = malloc(sizeof(MBPixbuf));

835

836

pb->dpy = dpy;

837

pb->scr = scr;

838

839

pb->root = RootWindow(dpy, scr);

840

pb->depth = depth;

841

pb->vis = vis;

842

843

pb->palette = NULL;

844

845

rmsk = pb->vis->red_mask;

846

gmsk = pb->vis->green_mask;

847

bmsk = pb->vis->blue_mask;

848

849

if (depth == 32 && pb->vis->class == TrueColor)

850

pb->byte_order = BYTE_ORD_32_ARGB;

851

else if ((rmsk > gmsk) && (gmsk > bmsk))

852

pb->byte_order = BYTE_ORD_24_RGB;

853

else if ((rmsk > bmsk) && (bmsk > gmsk))

854

pb->byte_order = BYTE_ORD_24_RBG;

855

else if ((bmsk > rmsk) && (rmsk > gmsk))

856

pb->byte_order = BYTE_ORD_24_BRG;

857

else if ((bmsk > gmsk) && (gmsk > rmsk))

858

pb->byte_order = BYTE_ORD_24_BGR;

859

else if ((gmsk > rmsk) && (rmsk > bmsk))

860

pb->byte_order = BYTE_ORD_24_GRB;

861

else if ((gmsk > bmsk) && (bmsk > rmsk))

862

pb->byte_order = BYTE_ORD_24_GBR;

863

else

864

pb->byte_order = 0;

865

866

pb->internal_bytespp = 3;

867

868

if ((pb->depth < 24 && !getenv("MBPIXBUF_FORCE_32BPP_INTERNAL"))

869

|| getenv("MBPIXBUF_FORCE_16BPP_INTERNAL"))

870

pb->internal_bytespp = 2;

871

872

if ((pb->depth <= 8))

873

{

874

XWindowAttributes xwa;

875

if (XGetWindowAttributes(dpy, pb->root, &xwa))

876

{

877

if (xwa.colormap)

878

pb->root_cmap = xwa.colormap;

879

else

880

pb->root_cmap = DefaultColormap(dpy, scr);

881

882

}

883

else

884

pb->root_cmap = DefaultColormap(dpy, scr);

885

pb->num_of_cols = _paletteAlloc(pb);

886

}

887

888

/* TODO: No exposes ? */

889

gcv.foreground = BlackPixel(dpy, scr);

890

gcv.background = WhitePixel(dpy, scr);

891

892

pb->gc = XCreateGC( dpy, pb->root, GCForeground | GCBackground, &gcv);

893

894

if (!XShmQueryExtension(pb->dpy) || getenv("MBPIXBUF_NO_SHM"))

895

{

896

fprintf(stderr, "mbpixbuf: no shared memory extension\n");

897

pb->have_shm = False;

898

}

899

else /* Really check we have shm */

900

{ /* Urg, not nicer way todo this ? */

901

XShmSegmentInfo shminfo;

902

903

pb->have_shm = True;

904

905

shminfo.shmid=shmget(IPC_PRIVATE, 1, IPC_CREAT|0777);

906

shminfo.shmaddr=shmat(shminfo.shmid,0,0);

907

shminfo.readOnly=True;

908

909

_mbpb_trap_errors();

910

911

XShmAttach(pb->dpy, &shminfo);

912

XSync(pb->dpy, False);

913

914

if (_mbpb_untrap_errors())

915

{

916

fprintf(stderr, "mbpixbuf: unable to use XShm. DISPLAY remote?\n");

917

pb->have_shm = False;

918

}

919

else XShmDetach(pb->dpy, &shminfo);

920

921

shmdt(shminfo.shmaddr);

922

shmctl(shminfo.shmid, IPC_RMID, 0);

923

}

924

return pb;

925

}

926

927

MBPixbufImage *

928

mb_pixbuf_img_new(MBPixbuf *pb, int w, int h)

929

{

930

MBPixbufImage *img;

931

932

img = malloc(sizeof(MBPixbufImage));

933

img->width = w;

934

img->height = h;

935

936

img->rgba = malloc(sizeof(unsigned char)*((w*h*(pb->internal_bytespp+1))));

937

memset(img->rgba, 0, sizeof(unsigned char)*((w*h*(pb->internal_bytespp+1))));

938

939

img->ximg = NULL;

940

img->has_alpha = 1;

941

img->internal_bytespp = pb->internal_bytespp;

942

943

return img;

944

}

945

946

MBPixbufImage *

947

mb_pixbuf_img_rgba_new(MBPixbuf *pb, int w, int h)

948

{

949

return mb_pixbuf_img_new(pb, w, h);

950

}

951

952

953

MBPixbufImage *

954

mb_pixbuf_img_rgb_new(MBPixbuf *pixbuf, int width, int height)

955

{

956

957

MBPixbufImage *img;

958

959

img = malloc(sizeof(MBPixbufImage));

960

img->width = width;

961

img->height = height;

962

963

img->rgba

964

= malloc(sizeof(unsigned char)*((width*height*pixbuf->internal_bytespp)));

965

memset(img->rgba, 0,

966

sizeof(unsigned char)*((width*height*pixbuf->internal_bytespp)));

967

968

img->ximg = NULL;

969

img->has_alpha = 0;

970

img->internal_bytespp = pixbuf->internal_bytespp;

971

972

return img;

973

974

}

975

976

/* ARGB Data */

977

978

MBPixbufImage *

979

mb_pixbuf_img_new_from_int_data(MBPixbuf *pixbuf,

980

const int *data,

981

int width,

982

int height)

983

{

984

MBPixbufImage *img;

985

int i=0,x,y;

986

987

img = mb_pixbuf_img_rgba_new(pixbuf, width, height);

988

989

if (pixbuf->internal_bytespp == 3)

990

{

991

unsigned char *p = img->rgba;

992

993

for (y=0; y<height; y++)

994

for (x=0; x<width; x++)

995

{

996

*p++ = (data[i] >> 16) & 0xff;

997

*p++ = (data[i] >> 8) & 0xff;

998

*p++ = data[i] & 0xff;

999

*p++ = data[i] >> 24;

1000

i++;

1001

}

1002

}

1003

else

1004

{

1005

unsigned char *p = img->rgba, r,g,b,a;

1006

1007

for (y=0; y<height; y++)

1008

for (x=0; x<width; x++)

1009

{

1010

r = ((data[i] >> 16) & 0xff);

1011

g = ((data[i] >> 8) & 0xff);

1012

b = (data[i] & 0xff);

1013

a = (data[i] >> 24);

1014

1015

internal_rgb_to_16bpp_pixel(r,g,b,p);

1016

internal_16bpp_pixel_next(p);

1017

*p++ = a;

1018

1019

i++;

1020

}

1021

}

1022

1023

return img;

1024

}

1025

1026

MBPixbufImage *

1027

mb_pixbuf_img_new_from_data(MBPixbuf *pixbuf,

1028

const unsigned char *data,

1029

int width,

1030

int height,

1031

Bool has_alpha)

1032

{

1033

MBPixbufImage *img;

1034

1035

if (has_alpha)

1036

img = mb_pixbuf_img_rgba_new(pixbuf, width, height);

1037

else

1038

img = mb_pixbuf_img_rgb_new(pixbuf, width, height);

1039

1040

if (pixbuf->internal_bytespp == 3)

1041

{

1042

memcpy(img->rgba, data, width*height*(3+has_alpha));

1043

}

1044

else

1045

{

1046

/* Data is expected as 24/32 RGBA. but internally were

1047

* 16/24 so we need to scale the data down.

1048

*/

1049

int x,y;

1050

unsigned char r,g,b, *p16 = img->rgba;

1051

const unsigned char *p24 = data;

1052

1053

for (x=0; x<img->width; x++)

1054

for (y=0; y<img->height; y++)

1055

{

1056

r = *p24++; g = *p24++; b = *p24++;

1057

internal_rgb_to_16bpp_pixel(r,g,b,p16);

1058

internal_16bpp_pixel_next(p16);

1059

1060

if (has_alpha)

1061

*p16++ = *p24++;

1062

}

1063

}

1064

1065

return img;

1066

}

1067

1068

MBPixbufImage *

1069

mb_pixbuf_img_new_from_drawable (MBPixbuf *pb,

1070

Drawable drw,

1071

Drawable msk,

1072

int sx,

1073

int sy,

1074

int sw,

1075

int sh )

1076

{

1077

return mb_pixbuf_img_new_from_x_drawable(pb, drw, msk, sx, sy, sw, sh, 0);

1078

}

1079

1080

MBPixbufImage *

1081

mb_pixbuf_img_new_from_x_drawable (MBPixbuf *pb,

1082

Drawable drw,

1083

Drawable msk,

1084

int sx,

1085

int sy,

1086

int sw,

1087

int sh,

1088

Bool want_alpha)

1089

{

1090

int i,x,y,br,bg,bb,mg,mb,mr,lr,lg,lb;

1091

unsigned long xpixel;

1092

unsigned char *p;

1093

MBPixbufImage *img;

1094

1095

XImage *ximg, *xmskimg = NULL;

1096

int num_of_cols = 1 << pb->depth;

1097

1098

Window chld;

1099

int rx;

1100

unsigned int rw, rh, rb, rdepth;

1101

1102

XShmSegmentInfo shminfo;

1103

1104

/* XXX should probably tray an X error here. */

1105

XGetGeometry(pb->dpy, (Window)drw, &chld, &rx, &rx,

1106

(unsigned int *)&rw, (unsigned int *)&rh,

1107

(unsigned int *)&rb, (unsigned int *)&rdepth);

1108

1109

if (rdepth != pb->depth) return NULL;

1110

1111

if ( (sx + sw) > rw || (sy + sh) > rh )

1112

{

1113

/* area wanted is bigger than pixmap - should probably trim it down */

1114

return NULL;

1115

}

1116

1117

XGrabServer(pb->dpy);

1118

1119

if (1) /* (!pb->have_shm) BROKE */

1120

{

1121

ximg = XGetImage(pb->dpy, drw, sx, sy, sw, sh, -1, ZPixmap);

1122

}

1123

else

1124

{

1125

ximg = XShmCreateImage(pb->dpy, pb->vis, pb->depth,

1126

ZPixmap, NULL, &shminfo,

1127

sw, sh );

1128

XSync(pb->dpy, False);

1129

1130

shminfo.shmid=shmget(IPC_PRIVATE,

1131

ximg->bytes_per_line*ximg->height,

1132

IPC_CREAT|0777);

1133

shminfo.shmaddr=img->ximg->data=shmat(shminfo.shmid,0,0);

1134

shminfo.readOnly=True;

1135

1136

XShmAttach(pb->dpy, &shminfo);

1137

1138

XSync(pb->dpy, False);

1139

1140

if (!XShmGetImage(pb->dpy, drw, ximg, sx, sy, -1))

1141

{

1142

return NULL;

1143

}

1144

1145

XSync(pb->dpy, False);

1146

1147

}

1148

1149

if (msk != None)

1150

xmskimg = XGetImage(pb->dpy, msk, sx, sy, sw, sh, -1, ZPixmap);

1151

1152

XUngrabServer(pb->dpy);

1153

XFlush(pb->dpy);

1154

1155

if (ximg == NULL) return NULL;

1156

1157

if (msk || want_alpha)

1158

img = mb_pixbuf_img_rgba_new(pb, sw, sh);

1159

else

1160

img = mb_pixbuf_img_rgb_new(pb, sw, sh);

1161

1162

p = img->rgba;

1163

1164

if (pb->depth > 8)

1165

{

1166

switch (pb->depth) {

1167

case 15:

1168

br = 7;

1169

bg = 2;

1170

bb = 3;

1171

mr = mg = mb = 0xf8;

1172

lr = lg = lb = 0;

1173

break;

1174

case 16:

1175

br = 8;

1176

bg = 3;

1177

lb = 3;

1178

bb = lr = lg = 0;

1179

mr = mb = 0xf8;

1180

mg = 0xfc;

1181

break;

1182

case 24:

1183

case 32:

1184

br = 16;

1185

bg = 8;

1186

bb = 0;

1187

lr = lg = lb = 0;

1188

mr = mg = mb = 0xff;

1189

break;

1190

default:

1191

return NULL;

1192

}

1193

1194

if (pb->internal_bytespp == 2)

1195

{

1196

for (y = 0; y < sh; y++)

1197

for (x = 0; x < sw; x++)

1198

{

1199

xpixel = XGetPixel(ximg, x, y);

1200

internal_rgb_to_16bpp_pixel((((xpixel >> br) << lr) & mr),

1201

(((xpixel >> bg) << lg) & mg),

1202

(((xpixel >> bb) << lb) & mb), p);

1203

1204

internal_16bpp_pixel_next(p);

1205

1206

if (msk)

1207

{

1208

if (xmskimg && XGetPixel(xmskimg, x, y))

1209

{

1210

*p++ = 255;

1211

}

1212

else *p++ = 0;

1213

}

1214

else if (want_alpha) p++;

1215

}

1216

}

1217

else

1218

{

1219

for (y = 0; y < sh; y++)

1220

for (x = 0; x < sw; x++)

1221

{

1222

xpixel = XGetPixel(ximg, x, y);

1223

*p++ = (((xpixel >> br) << lr) & mr); /* r */

1224

*p++ = (((xpixel >> bg) << lg) & mg); /* g */

1225

*p++ = (((xpixel >> bb) << lb) & mb); /* b */

1226

if (msk)

1227

{

1228

if (xmskimg && XGetPixel(xmskimg, x, y))

1229

{

1230

*p++ = 255;

1231

}

1232

else *p++ = 0;

1233

}

1234

else if (want_alpha) p++;

1235

}

1236

}

1237

}

1238

else

1239

{

1240

XColor cols[256];

1241

MBPixbufColor mbcols[256];

1242

1243

for (i = 0; i < num_of_cols; i++) {

1244

cols[i].pixel = i;

1245

cols[i].flags = DoRed | DoGreen | DoBlue;

1246

}

1247

XQueryColors(pb->dpy, pb->root_cmap, cols, num_of_cols);

1248

for (i = 0; i < num_of_cols; i++) {

1249

mbcols[i].r = cols[i].red >> 8;

1250

mbcols[i].g = cols[i].green >> 8;

1251

mbcols[i].b = cols[i].blue >> 8;

1252

mbcols[i].pixel = cols[i].pixel;

1253

}

1254

for (x = 0; x < sw; x++)

1255

for (y = 0; y < sh; y++)

1256

{

1257

xpixel = XGetPixel(ximg, x, y);

1258

*p++ = mbcols[xpixel & 0xff].r;

1259

*p++ = mbcols[xpixel & 0xff].g;

1260

*p++ = mbcols[xpixel & 0xff].b;

1261

if (msk)

1262

{

1263

if (xmskimg && XGetPixel(xmskimg, x, y))

1264

{

1265

*p++ = 255;

1266

}

1267

else *p++ = 0;

1268

}

1269

else if (want_alpha) p++;

1270

}

1271

}

1272

1273

if (0) /* (pb->have_shm) BROKE */

1274

{

1275

XShmDetach(pb->dpy, &shminfo);

1276

XDestroyImage (ximg);

1277

shmdt(shminfo.shmaddr);

1278

shmctl(shminfo.shmid, IPC_RMID, 0);

1279

}

1280

else XDestroyImage (ximg);

1281

1282

ximg = NULL;

1283

1284

return img;

1285

}

1286

1287

MBPixbufImage *

1288

mb_pixbuf_img_clone(MBPixbuf *pb, MBPixbufImage *img)

1289

{

1290

MBPixbufImage *img_new;

1291

1292

if (img->has_alpha)

1293

img_new = mb_pixbuf_img_rgba_new(pb, img->width, img->height);

1294

else

1295

img_new = mb_pixbuf_img_rgb_new(pb, img->width, img->height);

1296

1297

memcpy(img_new->rgba, img->rgba,

1298

sizeof(unsigned char)*((img->width * img->height * (pb->internal_bytespp + img->has_alpha))));

1299

return img_new;

1300

}

1301

1302

void

1303

mb_pixbuf_img_free(MBPixbuf *pb, MBPixbufImage *img)

1304

{

1305

if (img->rgba) free(img->rgba);

1306

free(img);

1307

}

1308

1309

static void

1310

_mb_convert_24bpp_to_16bpp(MBPixbuf *pb, MBPixbufImage **img)

1311

{

1312

MBPixbufImage *img16, *img24 = *img;

1313

int x,y;

1314

unsigned char r,g,b, *p16 = NULL, *p24 = NULL;

1315

1316

if (img24->has_alpha)

1317

img16 = mb_pixbuf_img_rgba_new(pb, img24->width, img24->height);

1318

else

1319

img16 = mb_pixbuf_img_rgb_new(pb, img24->width, img24->height);

1320

1321

p16 = img16->rgba; p24 = img24->rgba;

1322

1323

for (x=0; x<img24->width; x++)

1324

for (y=0; y<img24->height; y++)

1325

{

1326

r = *p24++;

1327

g = *p24++;

1328

b = *p24++;

1329

1330

internal_rgb_to_16bpp_pixel(r,g,b,p16);

1331

internal_16bpp_pixel_next(p16);

1332

1333

if (img24->has_alpha)

1334

*p16++ = *p24++;

1335

}

1336

1337

mb_pixbuf_img_free(pb, img24);

1338

1339

*img = img16;

1340

}

1341

1342

MBPixbufImage *

1343

mb_pixbuf_img_new_from_file(MBPixbuf *pb, const char *filename)

1344

{

1345

MBPixbufImage *img;

1346

1347

img = malloc(sizeof(MBPixbufImage));

1348

1349

#ifdef USE_PNG

1350

if (!strcasecmp(&filename[strlen(filename)-4], ".png"))

1351

img->rgba = _load_png_file( filename, &img->width,

1352

&img->height, &img->has_alpha );

1353

else

1354

#endif

1355

#ifdef USE_JPG

1356

if (!strcasecmp(&filename[strlen(filename)-4], ".jpg")

1357

|| !strcasecmp(&filename[strlen(filename)-5], ".jpeg"))

1358

img->rgba = _load_jpg_file( filename, &img->width,

1359

&img->height, &img->has_alpha );

1360

else

1361

#endif

1362

if (!strcasecmp(&filename[strlen(filename)-4], ".xpm"))

1363

img->rgba = _load_xpm_file( pb, filename, &img->width,

1364

&img->height, &img->has_alpha );

1365

else img->rgba = NULL;

1366

1367

if (img->rgba == NULL)

1368

{

1369

/* Load failed */

1370

free(img);

1371

return NULL;

1372

}

1373

1374

if (pb->internal_bytespp == 2)

1375

{

1376

/* Need to convert the data down, always comes as 24 rgb :/ */

1377

_mb_convert_24bpp_to_16bpp(pb, &img);

1378

}

1379

1380

img->ximg = NULL;

1381

1382

return img;

1383

}

1384

1385

void

1386

mb_pixbuf_img_fill(MBPixbuf *pb,

1387

MBPixbufImage *img,

1388

int r,

1389

int g,

1390

int b,

1391

int a)

1392

{

1393

unsigned char *p = img->rgba;

1394

int x,y;

1395

1396

if (pb->internal_bytespp == 2)

1397

{

1398

for(y=0; y<img->height; y++)

1399

for(x=0; x<img->width; x++)

1400

{

1401

internal_rgb_to_16bpp_pixel(r,g,b,p);

1402

internal_16bpp_pixel_next(p);

1403

if (img->has_alpha)

1404

{ *p = a; *p++; }

1405

}

1406

}

1407

else

1408

{

1409

for(y=0; y<img->height; y++)

1410

for(x=0; x<img->width; x++)

1411

{

1412

*p++ = r;

1413

*p++ = g;

1414

*p++ = b;

1415

if (img->has_alpha) *p++ = a;

1416

}

1417

}

1418

}

1419

1420

void

1421

mb_pixbuf_img_composite(MBPixbuf *pb, MBPixbufImage *dest,

1422

MBPixbufImage *src, int dx, int dy)

1423

{

1424

/* XXX depreictaed, should really now use copy_composite */

1425

int x, y, r, g, b, a;

1426

unsigned char *sp, *dp;

1427

int dbc = 0;

1428

1429

if (src->has_alpha == False)

1430

return mb_pixbuf_img_copy(pb, dest, src, 0, 0,

1431

src->width, src->height, dx, dy);

1432

sp = src->rgba;

1433

dp = dest->rgba;

1434

1435

dbc = (pb->internal_bytespp + dest->has_alpha);

1436

1437

dp += ((dest->width*dbc)*dy) + (dx*dbc);

1438

1439

if (pb->internal_bytespp == 2)

1440

{

1441

for(y=0; y<src->height; y++)

1442

{

1443

for(x=0; x<src->width; x++)

1444

{

1445

unsigned char dr,dg,db;

1446

1447

/* TODO, This needs optimising */

1448

1449

internal_16bpp_pixel_to_rgb(sp,r,g,b);

1450

internal_16bpp_pixel_next(sp);

1451

a = *sp++;

1452

1453

internal_16bpp_pixel_to_rgb(dp,dr,dg,db);

1454

alpha_composite(dr, r, a, dr);

1455

alpha_composite(dg, g, a, dg);

1456

alpha_composite(db, b, a, db);

1457

internal_rgb_to_16bpp_pixel(dr,dg,db,dp)

1458

internal_16bpp_pixel_next(dp);

1459

1460

dp += dest->has_alpha;

1461

}

1462

dp += (dest->width-src->width)*dbc;

1463

}

1464

1465

1466

}

1467

else

1468

{

1469

for(y=0; y<src->height; y++)

1470

{

1471

for(x=0; x<src->width; x++)

1472

{

1473

r = *sp++;

1474

g = *sp++;

1475

b = *sp++;

1476

a = *sp++;

1477

1478

alpha_composite(*dp, r, a, *dp);

1479

dp++;

1480

alpha_composite(*dp, g, a, *dp);

1481

dp++;

1482

alpha_composite(*dp, b, a, *dp);

1483

dp++;

1484

dp += dest->has_alpha;

1485

}

1486

dp += (dest->width-src->width)*dbc;

1487

}

1488

}

1489

}

1490

1491

void

1492

mb_pixbuf_img_copy_composite_with_alpha (MBPixbuf *pb,

1493

MBPixbufImage *dest,

1494

MBPixbufImage *src,

1495

int sx, int sy,

1496

int sw, int sh,

1497

int dx, int dy,

1498

int alpha_level )

1499

{

1500

int x, y, r, g, b, a;

1501

unsigned char *sp, *dp;

1502

int dbc = 0;

1503

1504

if (!src->has_alpha)

1505

return mb_pixbuf_img_copy(pb, dest, src, sx, sy, sw, sh, dx, dy);

1506

1507

sp = src->rgba;

1508

dp = dest->rgba;

1509

1510

dbc = (pb->internal_bytespp + dest->has_alpha);

1511

1512

dp += ((dest->width*dbc)*dy) + (dx*dbc);

1513

sp += ((src->width*(pb->internal_bytespp+1))*sy) + (sx*(pb->internal_bytespp+1));

1514

1515

if (pb->internal_bytespp == 2)

1516

{

1517

for(y=0; y<sh; y++)

1518

{

1519

for(x=0; x < sw; x++)

1520

{

1521

unsigned char dr,dg,db;

1522

1523

/* TODO, This needs optimising */

1524

1525

internal_16bpp_pixel_to_rgb(sp,r,g,b);

1526

internal_16bpp_pixel_next(sp);

1527

a = *sp; sp++;

1528

1529

if (alpha_level)

1530

{

1531

a += alpha_level;

1532

if (a < 0) a = 0;

1533

if (a > 255) a = 255;

1534

}

1535

1536

internal_16bpp_pixel_to_rgb(dp,dr,dg,db);

1537

alpha_composite(dr, r, a, dr);

1538

alpha_composite(dg, g, a, dg);

1539

alpha_composite(db, b, a, db);

1540

internal_rgb_to_16bpp_pixel(dr,dg,db,dp);

1541

internal_16bpp_pixel_next(dp);

1542

1543

if (dest->has_alpha)

1544

*dp++ = a;

1545

}

1546

dp += (dest->width-sw)*dbc;

1547

sp += (src->width-sw)*3;

1548

}

1549

}

1550

else

1551

{

1552

for(y=0; y<sh; y++)

1553

{

1554

for(x=0; x < sw; x++)

1555

{

1556

r = *sp++;

1557

g = *sp++;

1558

b = *sp++;

1559

a = *sp++;

1560

1561

if (alpha_level)

1562

{

1563

a += alpha_level;

1564

if (a < 0) a = 0;

1565

if (a > 255) a = 255;

1566

}

1567

1568

alpha_composite(*dp, r, a, *dp);

1569

dp++;

1570

alpha_composite(*dp, g, a, *dp);

1571

dp++;

1572

alpha_composite(*dp, b, a, *dp);

1573

dp++;

1574

if (dest->has_alpha) *dp++ = a;

1575

}

1576

dp += (dest->width-sw)*dbc;

1577

sp += (src->width-sw)*4;

1578

}

1579

}

1580

}

1581

1582

1583

void

1584

mb_pixbuf_img_copy_composite(MBPixbuf *pb, MBPixbufImage *dest,

1585

MBPixbufImage *src, int sx, int sy,

1586

int sw, int sh, int dx, int dy)

1587

{

1588

mb_pixbuf_img_copy_composite_with_alpha(pb, dest,src, sx, sy, sw, sh, dx, dy, 0);

1589

}

1590

1591

1592

void

1593

mb_pixbuf_img_copy(MBPixbuf *pb, MBPixbufImage *dest,

1594

MBPixbufImage *src, int sx, int sy, int sw, int sh,

1595

int dx, int dy)

1596

{

1597

int x, y, dbc, sbc;

1598

unsigned char *sp, *dp;

1599

1600

sp = src->rgba;

1601

dp = dest->rgba;

1602

dbc = (pb->internal_bytespp + dest->has_alpha);

1603

sbc = (pb->internal_bytespp + src->has_alpha);

1604

1605

dp += ((dest->width*dbc)*dy) + (dx*dbc);

1606

sp += ((src->width*sbc)*sy) + (sx*sbc);

1607

1608

for(y=0; y<sh; y++)

1609

{

1610

for(x=0; x < sw; x++)

1611

{

1612

*dp++ = *sp++;

1613

*dp++ = *sp++;

1614

if (pb->internal_bytespp > 2)

1615

*dp++ = *sp++;

1616

/* XXX below to optimise */

1617

if (dest->has_alpha && src->has_alpha)

1618

*dp++ = *sp++;

1619

else

1620

{

1621

if (dest->has_alpha) *dp++ = 0xff;

1622

// dp += dest->has_alpha;

1623

sp += src->has_alpha;

1624

}

1625

}

1626

dp += (dest->width-sw)*dbc;

1627

sp += (src->width-sw)*sbc;

1628

}

1629

}

1630

1631

MBPixbufImage *

1632

mb_pixbuf_img_scale_down(MBPixbuf *pb, MBPixbufImage *img,

1633

int new_width, int new_height)

1634

{

1635

MBPixbufImage *img_scaled;

1636

unsigned char *dest, *src, *srcy;

1637

int *xsample, *ysample;

1638

int bytes_per_line, i, x, y, r, g, b, a, nb_samples, xrange, yrange, rx, ry;

1639

1640

if ( new_width > img->width || new_height > img->height)

1641

return NULL;

1642

1643

if (img->has_alpha)

1644

{

1645

img_scaled = mb_pixbuf_img_rgba_new(pb, new_width, new_height);

1646

bytes_per_line = (img->width * (pb->internal_bytespp+1));

1647

}

1648

else

1649

{

1650

img_scaled = mb_pixbuf_img_rgb_new(pb, new_width, new_height);

1651

bytes_per_line = (img->width * pb->internal_bytespp);

1652

}

1653

1654

xsample = malloc( (new_width+1) * sizeof(int));

1655

ysample = malloc( (new_height+1) * sizeof(int));

1656

1657

for ( i = 0; i <= new_width; i++ )

1658

xsample[i] = i*img->width/new_width;

1659

for ( i = 0; i <= new_height; i++ )

1660

ysample[i] = i*img->height/new_height * img->width;

1661

1662

dest = img_scaled->rgba;

1663

1664

/* scan output image */

1665

for ( y = 0; y < new_height; y++ )

1666

{

1667

yrange = ( ysample[y+1] - ysample[y] )/img->width;

1668

for ( x = 0; x < new_width; x++)

1669

{

1670

xrange = xsample[x+1] - xsample[x];

1671

srcy = img->rgba + (( ysample[y] + xsample[x] )

1672

* ( (img->has_alpha) ? (pb->internal_bytespp+1) : pb->internal_bytespp ) );

1673

1674

/* average R,G,B,A values on sub-rectangle of source image */

1675

nb_samples = xrange * yrange;

1676

if ( nb_samples > 1 )

1677

{

1678

r = 0;

1679

g = 0;

1680

b = 0;

1681

a = 0;

1682

for ( ry = 0; ry < yrange; ry++ )

1683

{

1684

src = srcy;

1685

for ( rx = 0; rx < xrange; rx++ )

1686

{

1687

/* average R,G,B,A values */

1688

if (pb->internal_bytespp == 2)

1689

{

1690

unsigned char rr,gg,bb;

1691

internal_16bpp_pixel_to_rgb(src,rr,gg,bb);

1692

r += rr; g += gg; b += bb;

1693

internal_16bpp_pixel_next(src);

1694

}

1695

else

1696

{

1697

r += *src++;

1698

g += *src++;

1699

b += *src++;

1700

}

1701

if (img->has_alpha) a += *src++;

1702

}

1703

srcy += bytes_per_line;

1704

}

1705

1706

if (pb->internal_bytespp == 2)

1707

{

1708

unsigned char rr,gg,bb;

1709

rr = (r/nb_samples);

1710

gg = (g/nb_samples);

1711

bb = (b/nb_samples);

1712

1713

internal_rgb_to_16bpp_pixel(rr, gg, bb, dest);

1714

internal_16bpp_pixel_next(dest);

1715

}

1716

else

1717

{

1718

*dest++ = r/nb_samples;

1719

*dest++ = g/nb_samples;

1720

*dest++ = b/nb_samples;

1721

}

1722

if (img_scaled->has_alpha) *dest++ = a/nb_samples;

1723

}

1724

else

1725

{

1726

int i;

1727

for (i=0; i<(pb->internal_bytespp + img_scaled->has_alpha); i++)

1728

*dest++ = *srcy++;

1729

}

1730

}

1731

}

1732

1733

/* cleanup */

1734

free( xsample );

1735

free( ysample );

1736

1737

return img_scaled;

1738

}

1739

1740

MBPixbufImage *

1741

mb_pixbuf_img_scale_up(MBPixbuf *pb, MBPixbufImage *img,

1742

int new_width, int new_height)

1743

{

1744

MBPixbufImage *img_scaled;

1745

unsigned char *dest, *src;

1746

int x, y, xx, yy, bytes_per_line;

1747

1748

if ( new_width < img->width || new_height < img->height)

1749

return NULL;

1750

1751

if (img->has_alpha)

1752

{

1753

img_scaled = mb_pixbuf_img_rgba_new(pb, new_width, new_height);

1754

bytes_per_line = (img->width * (pb->internal_bytespp+1));

1755

}

1756

else

1757

{

1758

img_scaled = mb_pixbuf_img_rgb_new(pb, new_width, new_height);

1759

bytes_per_line = (img->width * pb->internal_bytespp);

1760

}

1761

1762

1763

dest = img_scaled->rgba;

1764

1765

for (y = 0; y < new_height; y++)

1766

{

1767

yy = (y * img->height) / new_height;

1768

for (x = 0; x < new_width; x++)

1769

{

1770

xx = (x * img->width) / new_width;

1771

src = img->rgba + ((yy * bytes_per_line))

1772

+ ( (img->has_alpha) ? (xx * (pb->internal_bytespp+1)) : (xx * pb->internal_bytespp) );

1773

*dest++ = *src++;

1774

*dest++ = *src++;

1775

if (pb->internal_bytespp > 2)

1776

*dest++ = *src++;

1777

1778

if (img->has_alpha)

1779

*dest++ = *src++;

1780

}

1781

}

1782

1783

return img_scaled;

1784

}

1785

1786

MBPixbufImage *

1787

mb_pixbuf_img_scale(MBPixbuf *pb, MBPixbufImage *img,

1788

int new_width, int new_height)

1789

{

1790

if (new_width >= img->width && new_height >= img->height)

1791

return mb_pixbuf_img_scale_up(pb, img, new_width, new_height);

1792

1793

if (new_width <= img->width && new_height <= img->height)

1794

return mb_pixbuf_img_scale_down(pb, img, new_width, new_height);

1795

1796

/* TODO: all scale functions should check for a dimention change

1797

being zero and act accordingly - ie faster.

1798

*/

1799

if (new_width >= img->width && new_height <= img->height)

1800

{

1801

MBPixbufImage *tmp=NULL, *tmp2 = NULL;

1802

tmp = mb_pixbuf_img_scale_up(pb, img, new_width, img->height);

1803

1804

tmp2 = mb_pixbuf_img_scale_down(pb, tmp, new_width, new_height);

1805

mb_pixbuf_img_free(pb, tmp);

1806

return tmp2;

1807

}

1808

1809

if (new_width <= img->width && new_height >= img->height)

1810

{

1811

MBPixbufImage *tmp, *tmp2;

1812

tmp = mb_pixbuf_img_scale_down(pb, img, new_width, img->height);

1813

1814

tmp2 = mb_pixbuf_img_scale_up(pb, tmp, new_width, new_height);

1815

mb_pixbuf_img_free(pb, tmp);

1816

return tmp2;

1817

}

1818

1819

return NULL;

1820

}

1821

1822

void

1823

mb_pixbuf_img_render_to_drawable(MBPixbuf *pb,

1824

MBPixbufImage *img,

1825

Drawable drw,

1826

int drw_x,

1827

int drw_y)

1828

{

1829

mb_pixbuf_img_render_to_drawable_with_gc(pb, img, drw, drw_x, drw_y, pb->gc);

1830

}

1831

1832

1833

void

1834

mb_pixbuf_img_render_to_drawable_with_gc(MBPixbuf *pb,

1835

MBPixbufImage *img,

1836

Drawable drw,

1837

int drw_x,

1838

int drw_y,

1839

GC gc)

1840

{

1841

int bitmap_pad;

1842

unsigned char *p;

1843

unsigned long pixel;

1844

int x,y;

1845

int a, r, g, b;

1846

1847

XShmSegmentInfo shminfo;

1848

Bool shm_success = False;

1849

1850

if (pb->have_shm)

1851

{

1852

img->ximg = XShmCreateImage(pb->dpy, pb->vis, pb->depth,

1853

ZPixmap, NULL, &shminfo,

1854

img->width, img->height );

1855

1856

shminfo.shmid=shmget(IPC_PRIVATE,

1857

img->ximg->bytes_per_line*img->ximg->height,

1858

IPC_CREAT|0777);

1859

shminfo.shmaddr = img->ximg->data = shmat(shminfo.shmid,0,0);

1860

1861

if (img->ximg->data == (char *)-1)

1862

{

1863

fprintf(stderr, "mbpixbuf: SHM can't attach SHM Segment for Shared XImage, falling back to XImages\n");

1864

XDestroyImage(img->ximg);

1865

shmctl(shminfo.shmid, IPC_RMID, 0);

1866

}

1867

else

1868

{

1869

shminfo.readOnly=True;

1870

XShmAttach(pb->dpy, &shminfo);

1871

shm_success = True;

1872

}

1873

}

1874

1875

if (!shm_success)

1876

{

1877

bitmap_pad = ( pb->depth > 16 )? 32 : (( pb->depth > 8 )? 16 : 8 );

1878

1879

img->ximg = XCreateImage( pb->dpy, pb->vis, pb->depth,

1880

ZPixmap, 0, 0,

1881

img->width, img->height, bitmap_pad, 0);

1882

1883

img->ximg->data = malloc( img->ximg->bytes_per_line*img->height );

1884

}

1885

1886

p = img->rgba;

1887

1888

if (pb->internal_bytespp == 2)

1889

{

1890

for(y=0; y<img->height; y++)

1891

for(x=0; x<img->width; x++)

1892

{

1893

/* Below is potentially dangerous.

1894

*/

1895

pixel = ( *p | (*(p+1) << 8));

1896

1897

p += ((img->has_alpha) ? 3 : 2);

1898

1899

XPutPixel(img->ximg, x, y, pixel);

1900

}

1901

}

1902

else

1903

{

1904

for(y=0; y<img->height; y++)

1905

{

1906

for(x=0; x<img->width; x++)

1907

{

1908

r = ( *p++ );

1909

g = ( *p++ );

1910

b = ( *p++ );

1911

a = ((img->has_alpha) ? *p++ : 0xff);

1912

1913

pixel = mb_pixbuf_get_pixel(pb, r, g, b, a);

1914

XPutPixel(img->ximg, x, y, pixel);

1915

}

1916

}

1917

}

1918

1919

if (!shm_success)

1920

{

1921

XPutImage( pb->dpy, drw, gc, img->ximg, 0, 0,

1922

drw_x, drw_y, img->width, img->height);

1923

XDestroyImage (img->ximg);

1924

}

1925

else

1926

{

1927

XShmPutImage(pb->dpy, drw, gc, img->ximg, 0, 0,

1928

drw_x, drw_y, img->width, img->height, False);

1929

1930

XSync(pb->dpy, False);

1931

XShmDetach(pb->dpy, &shminfo);

1932

XDestroyImage (img->ximg);

1933

shmdt(shminfo.shmaddr);

1934

shmctl(shminfo.shmid, IPC_RMID, 0);

1935

}

1936

1937

img->ximg = NULL; /* Safety On */

1938

}

1939

1940

void

1941

mb_pixbuf_img_render_to_mask(MBPixbuf *pb,

1942

MBPixbufImage *img,

1943

Drawable mask,

1944

int drw_x,

1945

int drw_y)

1946

{

1947

unsigned char *p;

1948

int x,y;

1949

GC gc1;

1950

XShmSegmentInfo shminfo;

1951

Bool shm_success = False;

1952

1953

if (!img->has_alpha) return;

1954

1955

gc1 = XCreateGC( pb->dpy, mask, 0, 0 );

1956

XSetForeground(pb->dpy, gc1, WhitePixel( pb->dpy, pb->scr ));

1957

1958

if (pb->have_shm)

1959

{

1960

img->ximg = XShmCreateImage(pb->dpy, pb->vis, 1,

1961

XYPixmap, NULL, &shminfo,

1962

img->width, img->height );

1963

1964

shminfo.shmid=shmget(IPC_PRIVATE,

1965

img->ximg->bytes_per_line*img->ximg->height,

1966

IPC_CREAT|0777);

1967

shminfo.shmaddr=img->ximg->data=shmat(shminfo.shmid,0,0);

1968

1969

if (img->ximg->data == (char *)-1)

1970

{

1971

if (mb_want_warnings())

1972

fprintf(stderr, "mbpixbuf: SHM can't attach SHM Segment for Shared XImage, falling back to XImages\n");

1973

XDestroyImage(img->ximg);

1974

shmctl(shminfo.shmid, IPC_RMID, 0);

1975

}

1976

else

1977

{

1978

shminfo.readOnly=True;

1979

XShmAttach(pb->dpy, &shminfo);

1980

shm_success = True;

1981

}

1982

}

1983

1984

if (!shm_success)

1985

{

1986

img->ximg = XCreateImage( pb->dpy, pb->vis, 1, XYPixmap,

1987

0, 0, img->width, img->height, 8, 0);

1988

1989

img->ximg->data = malloc( img->ximg->bytes_per_line*img->height );

1990

}

1991

1992

p = img->rgba;

1993

1994

for(y=0; y<img->height; y++)

1995

for(x=0; x<img->width; x++)

1996

{

1997

p += pb->internal_bytespp;

1998

XPutPixel(img->ximg, x, y, (*p < 127) ? 0 : 1);

1999

p++;

2000

}

2001

2002

if (!shm_success)

2003

{

2004

XPutImage( pb->dpy, mask, gc1, img->ximg, 0, 0,

2005

drw_x, drw_y, img->width, img->height);

2006

XDestroyImage (img->ximg);

2007

}

2008

else

2009

{

2010

XShmPutImage(pb->dpy, mask, gc1, img->ximg, 0, 0,

2011

drw_x, drw_y, img->width, img->height, False);

2012

XSync(pb->dpy, False);

2013

XShmDetach(pb->dpy, &shminfo);

2014

XDestroyImage (img->ximg);

2015

shmdt(shminfo.shmaddr);

2016

shmctl(shminfo.shmid, IPC_RMID, 0);

2017

}

2018

2019

XFreeGC( pb->dpy, gc1 );

2020

img->ximg = NULL; /* Safety On */

2021

}

2022

2023

unsigned char *

2024

mb_pixbuf_img_data (MBPixbuf *pixbuf,

2025

MBPixbufImage *image)

2026

{

2027

return image->rgba;

2028

}

2029

2030

void

2031

mb_pixbuf_img_get_pixel (MBPixbuf *pixbuf,

2032

MBPixbufImage *img,

2033

int x,

2034

int y,

2035

unsigned char *r,

2036

unsigned char *g,

2037

unsigned char *b,

2038

unsigned char *a

2039

)

2040

{

2041

int idx;

2042

2043

idx = pixbuf->internal_bytespp + img->has_alpha;

2044

2045

if (pixbuf->internal_bytespp == 2)

2046

{

2047

int offset = ( (y * img->width * idx) + ( x * idx ) );

2048

internal_16bpp_pixel_to_rgb(img->rgba+offset, *r, *g, *b);

2049

2050

if (img->has_alpha)

2051

*a = *(img->rgba+offset+2);

2052

else

2053

*a = 255;

2054

}

2055

else

2056

{

2057

*r = img->rgba[(((y)*img->width*idx)+((x)*idx))];

2058

*g = img->rgba[(((y)*img->width*idx)+((x)*idx))+1];

2059

*b = img->rgba[(((y)*img->width*idx)+((x)*idx))+2];

2060

2061

if (img->has_alpha)

2062

*a = img->rgba[(((y)*img->width*idx)+((x)*idx))+3];

2063

else

2064

*a = 255;

2065

}

2066

}

2067

2068

2069

void

2070

mb_pixbuf_img_plot_pixel (MBPixbuf *pb,

2071

MBPixbufImage *img,

2072

int x,

2073

int y,

2074

unsigned char r,

2075

unsigned char g,

2076

unsigned char b)

2077

{

2078

int idx;

2079

if (x >= img->width || y >= img->height) return;

2080

2081

idx = pb->internal_bytespp + img->has_alpha;

2082

2083

if (pb->internal_bytespp == 2)

2084

{

2085

int offset = (((y)*img->width*idx)+((x)*idx));

2086

internal_rgb_to_16bpp_pixel(r,g,b, (img->rgba+offset));

2087

}

2088

else

2089

{

2090

img->rgba[(((y)*img->width*idx)+((x)*idx))] = r;

2091

img->rgba[(((y)*img->width*idx)+((x)*idx))+1] = g;

2092

img->rgba[(((y)*img->width*idx)+((x)*idx))+2] = b;

2093

}

2094

}

2095

2096

void

2097

mb_pixbuf_img_plot_pixel_with_alpha (MBPixbuf *pb,

2098

MBPixbufImage *img,

2099

int x,

2100

int y,

2101

unsigned char r,

2102

unsigned char g,

2103

unsigned char b,

2104

unsigned char a)

2105

{

2106

int idx = (((y)*img->width*(pb->internal_bytespp+1))+((x)*(pb->internal_bytespp+1)));

2107

2108

if (!img->has_alpha)

2109

{

2110

mb_pixbuf_img_plot_pixel (pb, img, x, y, r, g, b );

2111

return;

2112

}

2113

2114

if (x >= img->width || y >= img->height) return;

2115

2116

if (pb->internal_bytespp == 2)

2117

{

2118

unsigned char rr,gg, bb;

2119

internal_16bpp_pixel_to_rgb((img->rgba+idx), rr,gg,bb);

2120

2121

alpha_composite(rr, (r), (a), rr);

2122

alpha_composite(gg, (g), (a), gg);

2123

alpha_composite(bb, (b), (a), bb);

2124

2125

internal_rgb_to_16bpp_pixel(rr,gg,bb, (img->rgba+idx));

2126

}

2127

else

2128

{

2129

alpha_composite(img->rgba[idx], (r), (a), img->rgba[idx]);

2130

alpha_composite(img->rgba[idx+1], (g), (a), img->rgba[idx+1]);

2131

alpha_composite(img->rgba[idx+2], (b), (a), img->rgba[idx+2]);

2132

}

2133

}

2134

2135

MBPixbufImage *

2136

mb_pixbuf_img_transform (MBPixbuf *pb,

2137

MBPixbufImage *img,

2138

MBPixbufTransform transform)

2139

{

2140

MBPixbufImage *img_trans;

2141

int new_width = 0, new_height = 0, new_x = 0, new_y = 0, idx;

2142

int bytes_per_line, x, y;

2143

int byte_offset = 0, new_byte_offset = 0;

2144

2145

switch (transform)

2146

{

2147

case MBPIXBUF_TRANS_ROTATE_90:

2148

case MBPIXBUF_TRANS_ROTATE_270:

2149

new_width = mb_pixbuf_img_get_height(img);

2150

new_height = mb_pixbuf_img_get_width(img);

2151

break;

2152

case MBPIXBUF_TRANS_ROTATE_180:

2153

case MBPIXBUF_TRANS_FLIP_VERT:

2154

case MBPIXBUF_TRANS_FLIP_HORIZ:

2155

new_width = mb_pixbuf_img_get_width(img);

2156

new_height = mb_pixbuf_img_get_height(img);

2157

2158

break;

2159

}

2160

2161

if (img->has_alpha)

2162

{

2163

img_trans = mb_pixbuf_img_rgba_new(pb, new_width, new_height);

2164

bytes_per_line = (img->width * (pb->internal_bytespp+1));

2165

idx = pb->internal_bytespp +1 ;

2166

}

2167

else

2168

{

2169

img_trans = mb_pixbuf_img_rgb_new(pb, new_width, new_height);

2170

bytes_per_line = (img->width * pb->internal_bytespp);

2171

idx = pb->internal_bytespp;

2172

}

2173

2174

for( y = 0; y < img->height; y++ )

2175

{

2176

for( x = 0; x < img->width; x++ )

2177

{

2178

2179

2180

/* XXX This could all be heavily optimised */

2181

switch (transform)

2182

{

2183

case MBPIXBUF_TRANS_ROTATE_180:

2184

new_x = new_width - 1 - x;

2185

new_y = new_height - 1 - y;

2186

break;

2187

case MBPIXBUF_TRANS_ROTATE_270:

2188

new_x = y;

2189

new_y = img->width - x - 1;

2190

break;

2191

case MBPIXBUF_TRANS_ROTATE_90:

2192

new_x = img->height - y - 1;

2193

new_y = x;

2194

break;

2195

case MBPIXBUF_TRANS_FLIP_VERT:

2196

new_x = x; new_y = img->height - y - 1;

2197

break;

2198

case MBPIXBUF_TRANS_FLIP_HORIZ:

2199

new_y = y; new_x = img->width - x - 1;

2200

break;

2201

}

2202

2203

byte_offset = (y * bytes_per_line) + ( x * idx );

2204

new_byte_offset = (new_y * (new_width) * idx) + ( new_x * idx );

2205

2206

img_trans->rgba[new_byte_offset] = img->rgba[byte_offset];

2207

img_trans->rgba[new_byte_offset+1] = img->rgba[byte_offset+1];

2208

2209

if (pb->internal_bytespp > 2)

2210

img_trans->rgba[new_byte_offset+2] = img->rgba[byte_offset+2];

2211

2212

if (img->has_alpha)

2213

img_trans->rgba[new_byte_offset+pb->internal_bytespp] = img->rgba[byte_offset+pb->internal_bytespp];

2214

}

2215

}

2216

2217

return img_trans;

2218

}