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libraries/PNGdec/src/PNGDisplay.h

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+//
+// PNG Display helper class
+//
+// written by Larry Bank
+// bitbank@pobox.com
+//
+// Copyright 2025 BitBank Software, Inc. All Rights Reserved.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//    http://www.apache.org/licenses/LICENSE-2.0
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//===========================================================================
+//
+#ifndef __PNGDISPLAY__
+#define __PNGDISPLAY__
+#include <PNGdec.h>
+#include <SD.h>
+#ifndef ARDUINO_ARCH_NRF52
+#include "FS.h"
+#include <LittleFS.h>
+#endif
+
+#if !defined(__BB_EPAPER__) && !defined(SPI_LCD_H) && !defined(__FASTEPD_H__)
+#error "One of the following display libraries must be included BEFORE PNGDisplay: bb_spi_lcd, bb_epaper, FastEPD"
+#endif
+
+// To center one or both coordinates for the drawing position
+//  use this constant value
+#define PNGDISPLAY_CENTER -2
+
+class PNGDisplay
+{
+  public:
+#ifdef SPI_LCD_H
+    int loadPNG(BB_SPI_LCD *pLCD, int x, int y, const void *pData, int iDataSize, uint32_t bgColor = 0xffffffff);
+    int loadPNG(BB_SPI_LCD *pLCD, int x, int y, const char *fname, uint32_t bgColor = 0xffffffff);
+    int loadPNG_LFS(BB_SPI_LCD *pLCD, int x, int y, const char *fname, uint32_t bgColor = 0xffffffff);
+#endif // SPI_LCD_H
+
+#ifdef __FASTEPD_H__
+    int loadPNG(FASTEPD *pDisplay, int x, int y, const void *pData, int iDataSize, uint32_t bgColor = 0xffffffff);
+    int loadPNG(FASTEPD *pDisplay, int x, int y, const char *fname, uint32_t bgColor = 0xffffffff);
+    int loadPNG_LFS(FASTEPD *pDisplay, int x, int y, const char *fname, uint32_t bgColor = 0xffffffff);
+#endif // __FASTEPD_H__
+
+#ifdef __BB_EPAPER__
+    int loadPNG(BBEPAPER *pDisplay, int x, int y, const void *pData, int iDataSize, uint32_t bgColor = 0xffffffff);
+    int loadPNG(BBEPAPER *pDisplay, int x, int y, const char *fname, uint32_t bgColor = 0xffffffff);
+    int loadPNG_LFS(BBEPAPER *pDisplay, int x, int y, const char *fname, uint32_t bgColor = 0xffffffff); 
+#endif // __BB_EPAPER__
+
+    int getPNGInfo(int *width, int *height, int *bpp, const void *pData, int iDataSize);
+    int getPNGInfo(int *width, int *height, int *bpp, const char *fname);
+    int getPNGInfo_LFS(int *width, int *height, int *bpp, const char *fname);
+    int getLastError() {return _iLastError;}
+  private:
+    int _iLastError;
+};
+
+#endif // __PNGDISPLAY__