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Diffstat (limited to 'glcdgraphics/glcd.c')
| -rw-r--r-- | glcdgraphics/glcd.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/glcdgraphics/glcd.c b/glcdgraphics/glcd.c new file mode 100644 index 0000000..6a74c33 --- /dev/null +++ b/glcdgraphics/glcd.c @@ -0,0 +1,277 @@ +/* + * GraphLCD graphics library + * + * glcd.c - GLCD file loading and saving + * + * based on graphlcd plugin 0.1.1 for the Video Disc Recorder + * (c) 2001-2004 Carsten Siebholz <c.siebholz AT t-online.de> + * + * This file is released under the GNU General Public License. Refer + * to the COPYING file distributed with this package. + * + * (c) 2004 Andreas Regel <andreas.regel AT powarman.de> + */ + +#include <stdio.h> +#include <stdint.h> +#include <syslog.h> + +#include <string> + +#include "bitmap.h" +#include "glcd.h" +#include "image.h" + + +namespace GLCD +{ + +using namespace std; + +const char * kGLCDFileSign = "GLC"; + +/* +#pragma pack(1) +struct tGLCDHeader +{ + char sign[3]; // = "GLC" + char format; // D - single image, A - animation + uint16_t width; // width in pixels + uint16_t height; // height in pixels + // only for animations + uint16_t count; // number of pictures + uint32_t delay; // delay in ms +}; +#pragma pack() +*/ + +cGLCDFile::cGLCDFile() +{ +} + +cGLCDFile::~cGLCDFile() +{ +} + +bool cGLCDFile::Load(cImage & image, const string & fileName) +{ + FILE * fp; + long fileSize; + char sign[4]; + uint8_t buf[6]; + uint16_t width; + uint16_t height; + uint16_t count; + uint32_t delay; + + fp = fopen(fileName.c_str(), "rb"); + if (!fp) + { + syslog(LOG_ERR, "glcdgraphics: open %s failed (cGLCDFile::Load).", fileName.c_str()); + return false; + } + + // get len of file + if (fseek(fp, 0, SEEK_END) != 0) + { + fclose(fp); + return false; + } + fileSize = ftell(fp); + + // rewind and get Header + if (fseek(fp, 0, SEEK_SET) != 0) + { + fclose(fp); + return false; + } + + // read header sign + if (fread(sign, 4, 1, fp) != 1) + { + fclose(fp); + return false; + } + + // check header sign + if (strncmp(sign, kGLCDFileSign, 3) != 0) + { + syslog(LOG_ERR, "glcdgraphics: load %s failed, wrong header (cGLCDFile::Load).", fileName.c_str()); + fclose(fp); + return false; + } + + // read width and height + if (fread(buf, 4, 1, fp) != 1) + { + fclose(fp); + return false; + } + + width = (buf[1] << 8) | buf[0]; + height = (buf[3] << 8) | buf[2]; + if (width == 0 || height == 0) + { + syslog(LOG_ERR, "glcdgraphics: load %s failed, wrong header (cGLCDFile::Load).", fileName.c_str()); + fclose(fp); + return false; + } + + if (sign[3] == 'D') + { + count = 1; + delay = 10; + // check file length + if (fileSize != (long) (height * ((width + 7) / 8) + 8)) + { + syslog(LOG_ERR, "glcdgraphics: load %s failed, wrong size (cGLCDFile::Load).", fileName.c_str()); + fclose(fp); + return false; + } + } + else if (sign[3] == 'A') + { + // read count and delay + if (fread(buf, 6, 1, fp) != 1) + { + syslog(LOG_ERR, "glcdgraphics: load %s failed, wrong header (cGLCDFile::Load).", fileName.c_str()); + fclose(fp); + return false; + } + count = (buf[1] << 8) | buf[0]; + delay = (buf[5] << 24) | (buf[4] << 16) | (buf[3] << 8) | buf[2]; + // check file length + if (count == 0 || + fileSize != (long) (count * (height * ((width + 7) / 8)) + 14)) + { + syslog(LOG_ERR, "glcdgraphics: load %s failed, wrong size (cGLCDFile::Load).", fileName.c_str()); + fclose(fp); + return false; + } + // Set minimal limit for next image + if (delay < 10) + delay = 10; + } + else + { + syslog(LOG_ERR, "glcdgraphics: load %s failed, wrong header (cGLCDFile::Load).", fileName.c_str()); + fclose(fp); + return false; + } + + image.Clear(); + image.SetWidth(width); + image.SetHeight(height); + image.SetDelay(delay); + unsigned char * bmpdata = new unsigned char[height * ((width + 7) / 8)]; + if (bmpdata) + { + for (unsigned int n = 0; n < count; n++) + { + if (fread(bmpdata, height * ((width + 7) / 8), 1, fp) != 1) + { + delete[] bmpdata; + fclose(fp); + image.Clear(); + return false; + } + image.AddBitmap(new cBitmap(width, height, bmpdata)); + } + delete[] bmpdata; + } + else + { + syslog(LOG_ERR, "glcdgraphics: malloc failed (cGLCDFile::Load)."); + fclose(fp); + image.Clear(); + return false; + } + fclose(fp); + + syslog(LOG_DEBUG, "glcdgraphics: image %s loaded.", fileName.c_str()); + return true; +} + +bool cGLCDFile::Save(cImage & image, const string & fileName) +{ + FILE * fp; + uint8_t buf[14]; + uint16_t width; + uint16_t height; + uint16_t count; + uint32_t delay; + const cBitmap * bitmap; + int i; + + if (image.Count() == 0) + return false; + + fp = fopen(fileName.c_str(), "wb"); + if (!fp) + { + syslog(LOG_ERR, "glcdgraphics: open %s failed (cGLCDFile::Save).", fileName.c_str()); + return false; + } + + memcpy(buf, kGLCDFileSign, 3); + count = image.Count(); + delay = image.Delay(); + if (count == 1) + { + buf[3] = 'D'; + } + else + { + buf[3] = 'A'; + } + bitmap = image.GetBitmap(0); + width = bitmap->Width(); + height = bitmap->Height(); + buf[4] = (uint8_t) width; + buf[5] = (uint8_t) (width >> 8); + buf[6] = (uint8_t) height; + buf[7] = (uint8_t) (height >> 8); + if (count == 1) + { + if (fwrite(buf, 8, 1, fp) != 1) + { + fclose(fp); + return false; + } + } + else + { + buf[8] = (uint8_t) count; + buf[9] = (uint8_t) (count >> 8); + buf[10] = (uint8_t) delay; + buf[11] = (uint8_t) (delay >> 8); + buf[12] = (uint8_t) (delay >> 16); + buf[13] = (uint8_t) (delay >> 24); + if (fwrite(buf, 14, 1, fp) != 1) + { + fclose(fp); + return false; + } + } + for (i = 0; i < count; i++) + { + bitmap = image.GetBitmap(i); + if (bitmap) + { + if (bitmap->Width() == width && bitmap->Height() == height) + { + if (fwrite(bitmap->Data(), height * ((width + 7) / 8), 1, fp) != 1) + { + fclose(fp); + return false; + } + } + } + } + fclose(fp); + + syslog(LOG_DEBUG, "glcdgraphics: image %s saved.", fileName.c_str()); + return true; +} + +} // end of namespace |