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Save_GIF()/GIF_next_pixel() support saving sub-area of the canvas

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This commit is contained in:
Thomas Bernard 2017-12-20 00:29:46 +01:00
parent 8fa036c0c4
commit ea81cbb46b
1 changed files with 6 additions and 6 deletions
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12
src/fileformats.c
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@ -3030,10 +3030,10 @@ void Load_GIF(T_IO_Context * context)
temp=Get_pixel(context, GIF_pos_X,GIF_pos_Y); temp=Get_pixel(context, GIF_pos_X,GIF_pos_Y);
if (++GIF_pos_X>=idb->Image_width) if (++GIF_pos_X >= (idb->Image_width + idb->Pos_X))
{ {
GIF_pos_X=0; GIF_pos_X = idb->Pos_X;
if (++GIF_pos_Y>=idb->Image_height) if (++GIF_pos_Y >= (idb->Image_height + idb->Pos_Y))
GIF_stop=1; GIF_stop=1;
} }
@ -3264,8 +3264,8 @@ void Save_GIF(T_IO_Context * context)
// Le block indicateur d'IDB et l'IDB ont étés correctements // Le block indicateur d'IDB et l'IDB ont étés correctements
// écrits. // écrits.
GIF_pos_X=0; GIF_pos_X=IDB.Pos_X;
GIF_pos_Y=0; GIF_pos_Y=IDB.Pos_Y;
GIF_last_byte=0; GIF_last_byte=0;
GIF_remainder_bits=0; GIF_remainder_bits=0;
GIF_remainder_byte=0; GIF_remainder_byte=0;
@ -3402,7 +3402,7 @@ void Save_GIF(T_IO_Context * context)
GIF_set_code(eof); // 257 for 8bpp // Code de End d'image GIF_set_code(eof); // 257 for 8bpp // Code de End d'image
if (GIF_remainder_bits!=0) if (GIF_remainder_bits!=0)
{ {
// WRITE last byte // Write last byte (this is an incomplete byte)
GIF_buffer[++GIF_remainder_byte]=GIF_last_byte; GIF_buffer[++GIF_remainder_byte]=GIF_last_byte;
GIF_last_byte=0; GIF_last_byte=0;
GIF_remainder_bits=0; GIF_remainder_bits=0;