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#include <emCore/emFpPlugin.h>
#include <emCore/emImageFile.h>
#include "avif/avif.h"
class PlAvifImageFileModel : public emImageFileModel
{
public:
static emRef<PlAvifImageFileModel> Acquire(
emContext & context, const emString & name, bool common=true
);
protected:
PlAvifImageFileModel(emContext & context, const emString & name);
virtual ~PlAvifImageFileModel();
virtual void TryStartLoading();
virtual bool TryContinueLoading();
virtual void QuitLoading();
virtual void TryStartSaving();
virtual bool TryContinueSaving();
virtual void QuitSaving();
virtual emUInt64 CalcMemoryNeed();
virtual double CalcFileProgress();
private:
struct LoadingState;
LoadingState * L = NULL;
};
struct PlAvifImageFileModel::LoadingState {
avifRGBImage rgb;
avifDecoder * decoder;
};
emRef<PlAvifImageFileModel> PlAvifImageFileModel::Acquire(
emContext & context, const emString & name, bool common
)
{
EM_IMPL_ACQUIRE(PlAvifImageFileModel, context, name, common)
}
PlAvifImageFileModel::PlAvifImageFileModel(
emContext & context, const emString & name
)
: emImageFileModel(context, name)
{
}
PlAvifImageFileModel::~PlAvifImageFileModel()
{
PlAvifImageFileModel::QuitLoading();
PlAvifImageFileModel::QuitSaving();
}
void PlAvifImageFileModel::TryStartLoading()
{
avifResult result;
L = new LoadingState;
memset(L, 0, sizeof(LoadingState));
L->decoder = avifDecoderCreate();
if (L->decoder == NULL) {
throw emException("failed to create AVIF decoder");
}
result = avifDecoderSetIOFile(L->decoder, GetFilePath());
if (result != AVIF_RESULT_OK) {
throw emException("%s", avifResultToString(result));
}
result = avifDecoderParse(L->decoder);
if (result != AVIF_RESULT_OK) {
throw emException("%s", avifResultToString(result));
}
FileFormatInfo = emString::Format(
"AVIF %s %ubpc",
avifPixelFormatToString(L->decoder->image->yuvFormat),
L->decoder->image->depth
);
Signal(ChangeSignal);
}
bool PlAvifImageFileModel::TryContinueLoading()
{
avifResult result;
if (!Image.GetHeight()) {
Image.Setup(
L->decoder->image->width,
L->decoder->image->height,
L->decoder->alphaPresent ? 4 : 3
);
}
result = avifDecoderNextImage(L->decoder);
if (result != AVIF_RESULT_OK) {
throw emException("%s", avifResultToString(result));
}
avifRGBImageSetDefaults(&L->rgb, L->decoder->image);
L->rgb.format = L->decoder->alphaPresent ?
AVIF_RGB_FORMAT_RGBA : AVIF_RGB_FORMAT_RGB;
L->rgb.pixels = Image.GetWritableMap();
L->rgb.width = Image.GetWidth();
L->rgb.height = Image.GetHeight();
L->rgb.depth = 8;
L->rgb.rowBytes = Image.GetWidth() * Image.GetChannelCount();
result = avifImageYUVToRGB(L->decoder->image, &L->rgb);
if (result != AVIF_RESULT_OK) {
throw emException("%s", avifResultToString(result));
}
Signal(ChangeSignal);
return true;
}
void PlAvifImageFileModel::QuitLoading()
{
if (L) {
if (L->decoder) avifDecoderDestroy(L->decoder);
delete L;
L = NULL;
}
}
void PlAvifImageFileModel::TryStartSaving()
{
throw emException("PlAvifImageFileModel: Saving not implemented.");
}
bool PlAvifImageFileModel::TryContinueSaving()
{
return false;
}
void PlAvifImageFileModel::QuitSaving()
{
}
emUInt64 PlAvifImageFileModel::CalcMemoryNeed()
{
return
(emUInt64)
L->decoder->image->width *
L->decoder->image->height *
(L->decoder->alphaPresent ? 4 : 3);
}
double PlAvifImageFileModel::CalcFileProgress()
{
return 0.0;
}
extern "C" {
emPanel * PlAvifFpPluginFunc(
emPanel::ParentArg parent, const emString & name,
const emString & path, emFpPlugin * plugin,
emString * errorBuf
)
{
if (plugin->Properties.GetCount()) {
*errorBuf="PlAvifFpPlugin: No properties allowed.";
return NULL;
}
return new emImageFilePanel(
parent, name,
PlAvifImageFileModel::Acquire(
parent.GetRootContext(), path
)
);
}
}
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