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Fix problem saving transparent GIF and PNG files when the background layer is hidden

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This commit is contained in:
David Capello 2015-04-21 10:01:28 -03:00
parent e17804e9ff
commit 9fa26dc2f4
3 changed files with 10 additions and 7 deletions
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2
src/app/file/gif_format.cpp
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@ -535,7 +535,7 @@ bool GifFormat::onSave(FileOp* fop)
PixelFormat sprite_format = sprite->pixelFormat();
bool interlaced = gif_options->interlaced();
int loop = (gif_options->loop() ? 0: -1);
bool has_background = (sprite->backgroundLayer() ? true: false);
bool has_background = (sprite->backgroundLayer() && sprite->backgroundLayer()->isVisible());
int background_color = (sprite_format == IMAGE_INDEXED ? sprite->transparentColor(): 0);
int transparent_index = (has_background ? -1: sprite->transparentColor());

9
src/app/file/png_format.cpp
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@ -414,10 +414,11 @@ bool PngFormat::onSave(FileOp* fop)
png_set_PLTE(png_ptr, info_ptr, palette, PNG_MAX_PALETTE_LENGTH);
// If the sprite does not have a background layer, we include the
// alpha information of palette entries to indicate which is the
// transparent color.
if (fop->document->sprite()->backgroundLayer() == NULL) {
// If the sprite does not have a (visible) background layer, we
// include the alpha information of palette entries to indicate
// which is the transparent color.
if (fop->document->sprite()->backgroundLayer() == NULL ||
!fop->document->sprite()->backgroundLayer()->isVisible()) {
int mask_entry = fop->document->sprite()->transparentColor();
int num_trans = mask_entry+1;
png_bytep trans = (png_bytep)png_malloc(png_ptr, num_trans);

6
src/doc/sprite.cpp
View File

@ -150,8 +150,10 @@ bool Sprite::needAlpha() const
{
switch (m_format) {
case IMAGE_RGB:
case IMAGE_GRAYSCALE:
return (backgroundLayer() == NULL);
case IMAGE_GRAYSCALE: {
Layer* bg = backgroundLayer();
return (!bg || !bg->isVisible());
}
}
return false;
}