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common/formats/formatinfo.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/formats/formatinfo.h"
+
+#include "common/translation.h"
+#include "common/util.h"
+
+#include "image/bmp.h"
+#include "image/png.h"
+
+namespace Common {
+
+namespace FormatInfo {
+
+struct FormatTypeInfo {
+	const char *_shortExtension;	///< Extension limited to 3 characters
+	const char *_longExtension;     ///< Extension with no length limit
+};
+
+const FormatTypeInfo g_formatTypeInfo[kCount] = {
+	{nullptr, nullptr},
+
+	// Image formats
+	{"bmp", nullptr},
+	{"png", nullptr},
+	{"jpg", nullptr},
+	{"pct", "pict"},
+
+	// Binary formats
+	{"application/octet-stream", nullptr},
+};
+
+ImageFormatCharacteristics::ImageFormatCharacteristics()
+	: _lossiness(kLossinessUnknown), _supportAlpha(false), _supportPalette(false), _maxBitDepth(0) {
+}
+
+ImageSaveProperties::ImageSaveProperties() : _qualityLevel(75) {
+}
+
+bool getImageFormatCharacteristics(FormatID format, ImageFormatCharacteristics &outCharacteristics) {
+	outCharacteristics = ImageFormatCharacteristics();
+
+	switch (format) {
+	case kPICT:
+		outCharacteristics._supportPalette = true;
+		outCharacteristics._maxBitDepth = 24;
+		outCharacteristics._lossiness = kLossinessEither;
+		break;
+	case kBMP:
+		outCharacteristics._supportPalette = true;
+		outCharacteristics._maxBitDepth = 24;
+		outCharacteristics._lossiness = kLossinessLossless;
+		break;
+	case kPNG:
+		outCharacteristics._supportPalette = true;
+		outCharacteristics._supportAlpha = true;
+		outCharacteristics._maxBitDepth = 32;
+		outCharacteristics._lossiness = kLossinessLossless;
+		break;
+	case kJPEG:
+		outCharacteristics._maxBitDepth = 24;
+		outCharacteristics._lossiness = kLossinessLossy;
+		break;
+	default:
+		return false;
+	}
+
+	return true;
+}
+
+const char *getFormatExtension(Common::FormatInfo::FormatID format, bool limitTo3Characters) {
+	const FormatTypeInfo &typeInfo = g_formatTypeInfo[format];
+
+	if (!limitTo3Characters && typeInfo._longExtension != nullptr)
+		return typeInfo._longExtension;
+
+	return typeInfo._shortExtension;
+}
+
+Common::U32String getFormatSaveDescription(Common::FormatInfo::FormatID format) {
+	switch (format) {
+	case kBMP:
+		return _("Bitmap Image File");
+	case kPNG:
+		return _("PNG Image File");
+	case kJPEG:
+		return _("JPEG Image File");
+	case kPICT:
+		return _("QuickDraw PICT Image File");
+	case kUntypedBinary:
+	default:
+		return _("Data File");
+	}
+}
+
+#ifdef USE_PNG
+static bool savePNG(Common::WriteStream &stream, const Graphics::Surface &surf, const byte *palette, const ImageSaveProperties &props) {
+	return Image::writePNG(stream, surf, palette);
+}
+#endif
+
+static bool saveBMP(Common::WriteStream &stream, const Graphics::Surface &surf, const byte *palette, const ImageSaveProperties &props) {
+	return Image::writeBMP(stream, surf, palette);
+}
+
+ImageSaveCallback_t getImageSaveFunction(FormatID format) {
+	switch (format) {
+#ifdef USE_PNG
+	case kPNG:
+		return savePNG;
+#endif
+	case kBMP:
+		return saveBMP;
+	default:
+		return nullptr;
+	}
+}
+
+FormatSupportLevel getFormatSupportLevel(Common::FormatInfo::FormatID format) {
+	switch (format) {
+	case kPICT:
+		return kFormatSupportLevelAvoid;
+	case kPNG:
+	case kJPEG:
+		return kFormatSupportLevelPreferred;
+	default:
+		return kFormatSupportLevelDefault;
+	}
+}
+
+} // End of namespace FormatInfo
+
+} // End of namespace Common