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Add pixel ratio to .aseprite file format

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This commit is contained in:
David Capello 2016-05-24 12:42:47 -03:00
parent a9c18db7a4
commit 6f15ee7392
2 changed files with 24 additions and 3 deletions
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7
docs/files/ase.txt
View File

@ -1,5 +1,5 @@
ASE Files (.ASE) Format description
Copyright (C) 2001-2015 by David Capello
Copyright (C) 2001-2016 by David Capello
----------------------------------------------------------------------
1. References
@ -82,7 +82,10 @@ BYTE Palette entry (index) which represent transparent
sprites).
BYTE[3] Ignore these bytes
WORD Number of colors (0 means 256 for old sprites)
BYTE[94] For future (set to zero)
BYTE Pixel width (pixel ratio is "pixel width/pixel height")
If this or pixel height field is zero, pixel ratio is 1:1
BYTE Pixel height
BYTE[92] For future (set to zero)
========================================

20
src/app/file/ase_format.cpp
View File

@ -1,5 +1,5 @@
// Aseprite
// Copyright (C) 2001-2015 David Capello
// Copyright (C) 2001-2016 David Capello
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2 as
@ -71,6 +71,8 @@ struct ASE_Header {
uint8_t transparent_index;
uint8_t ignore[3];
uint16_t ncolors;
uint8_t pixel_width;
uint8_t pixel_height;
};
struct ASE_FrameHeader {
@ -193,6 +195,9 @@ bool AseFormat::onLoad(FileOp* fop)
// Set transparent entry
sprite->setTransparentColor(header.transparent_index);
// Set pixel ratio
sprite->setPixelRatio(PixelRatio(header.pixel_width, header.pixel_height));
// Prepare variables for layer chunks
Layer* last_layer = sprite->folder();
WithUserData* last_object_with_user_data = nullptr;
@ -436,9 +441,18 @@ static bool ase_file_read_header(FILE* f, ASE_Header* header)
header->ignore[1] = fgetc(f);
header->ignore[2] = fgetc(f);
header->ncolors = fgetw(f);
header->pixel_width = fgetc(f);
header->pixel_height = fgetc(f);
if (header->ncolors == 0) // 0 means 256 (old .ase files)
header->ncolors = 256;
if (header->pixel_width == 0 ||
header->pixel_height == 0) {
header->pixel_width = 1;
header->pixel_height = 1;
}
fseek(f, header->pos+128, SEEK_SET);
return true;
}
@ -464,6 +478,8 @@ static void ase_file_prepare_header(FILE* f, ASE_Header* header, const Sprite* s
header->ignore[1] = 0;
header->ignore[2] = 0;
header->ncolors = sprite->palette(frame_t(0))->size();
header->pixel_width = sprite->pixelRatio().w;
header->pixel_height = sprite->pixelRatio().h;
}
static void ase_file_write_header(FILE* f, ASE_Header* header)
@ -485,6 +501,8 @@ static void ase_file_write_header(FILE* f, ASE_Header* header)
fputc(header->ignore[1], f);
fputc(header->ignore[2], f);
fputw(header->ncolors, f);
fputc(header->pixel_width, f);
fputc(header->pixel_height, f);
fseek(f, header->pos+128, SEEK_SET);
}