David Smart / RA8875 Featured

Library to control a Graphics TFT connected to 4-wire SPI - revised for the Raio RA8875 Display Controller.

Dependents:   FRDM_RA8875_mPaint RA8875_Demo RA8875_KeyPadDemo SignalGenerator ... more

Fork of SPI_TFT by Peter Drescher

See Components - RA8875 Based Display

Enhanced touch-screen support - where it previous supported both the Resistive Touch and Capacitive Touch based on the FT5206 Touch Controller, now it also has support for the GSL1680 Touch Controller.

Offline Help Manual (Windows chm)

/media/uploads/WiredHome/ra8875.zip.bin (download, rename to .zip and unzip)

GraphicsDisplayJPEG.h@115:c9862fd0c689, 2016-05-16 (annotated)

Committer:
WiredHome
Date:
Mon May 16 02:05:37 2016 +0000
Revision:
115:c9862fd0c689
Child:
125:7a0b70f56550
Jpeg rendering - not yet working, just an intermediate check-point.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WiredHome 115:c9862fd0c689 1 /// Wrapping ChaN's TJpgDec into this graphics engine
WiredHome 115:c9862fd0c689 2 ///
WiredHome 115:c9862fd0c689 3
WiredHome 115:c9862fd0c689 4 #ifndef GraphicsDisplayJPEG_H
WiredHome 115:c9862fd0c689 5 #define GraphicsDisplayJPEG_H
WiredHome 115:c9862fd0c689 6
WiredHome 115:c9862fd0c689 7 /*----------------------------------------------------------------------------/
WiredHome 115:c9862fd0c689 8 / TJpgDec - Tiny JPEG Decompressor include file (C)ChaN, 2012
WiredHome 115:c9862fd0c689 9 /----------------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 10 #ifndef _TJPGDEC
WiredHome 115:c9862fd0c689 11 #define _TJPGDEC
WiredHome 115:c9862fd0c689 12
WiredHome 115:c9862fd0c689 13 /*---------------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 14 /* System Configurations */
WiredHome 115:c9862fd0c689 15
WiredHome 115:c9862fd0c689 16 #define JD_SZBUF 512 /* Size of stream input buffer */
WiredHome 115:c9862fd0c689 17 #define JD_FORMAT 1 /* Output pixel format 0:RGB888 (3 BYTE/pix), 1:RGB565 (1 WORD/pix) */
WiredHome 115:c9862fd0c689 18 #define JD_USE_SCALE 1 /* Use descaling feature for output */
WiredHome 115:c9862fd0c689 19 #define JD_TBLCLIP 1 /* Use table for saturation (might be a bit faster but increases 1K bytes of code size) */
WiredHome 115:c9862fd0c689 20
WiredHome 115:c9862fd0c689 21 /*---------------------------------------------------------------------------*/
WiredHome 115:c9862fd0c689 22
WiredHome 115:c9862fd0c689 23 #include "DisplayDefs.h"
WiredHome 115:c9862fd0c689 24
WiredHome 115:c9862fd0c689 25 /* Error code */
WiredHome 115:c9862fd0c689 26 typedef enum {
WiredHome 115:c9862fd0c689 27 JDR_OK = noerror, /* 0: Succeeded */
WiredHome 115:c9862fd0c689 28 JDR_INTR = external_abort, /* 1: Interrupted by output function */
WiredHome 115:c9862fd0c689 29 JDR_INP = bad_parameter, /* 2: Device error or wrong termination of input stream */
WiredHome 115:c9862fd0c689 30 JDR_MEM1 = not_enough_ram, /* 3: Insufficient memory pool for the image */
WiredHome 115:c9862fd0c689 31 JDR_MEM2 = not_enough_ram, /* 4: Insufficient stream input buffer */
WiredHome 115:c9862fd0c689 32 JDR_PAR = bad_parameter, /* 5: Parameter error */
WiredHome 115:c9862fd0c689 33 JDR_FMT1 = not_supported_format, /* 6: Data format error (may be damaged data) */
WiredHome 115:c9862fd0c689 34 JDR_FMT2 = not_supported_format, /* 7: Right format but not supported */
WiredHome 115:c9862fd0c689 35 JDR_FMT3 = not_supported_format /* 8: Not supported JPEG standard */
WiredHome 115:c9862fd0c689 36 } JRESULT;
WiredHome 115:c9862fd0c689 37
WiredHome 115:c9862fd0c689 38
WiredHome 115:c9862fd0c689 39
WiredHome 115:c9862fd0c689 40 /* Rectangular structure */
WiredHome 115:c9862fd0c689 41 typedef struct {
WiredHome 115:c9862fd0c689 42 loc_t left, right, top, bottom;
WiredHome 115:c9862fd0c689 43 } JRECT;
WiredHome 115:c9862fd0c689 44
WiredHome 115:c9862fd0c689 45
WiredHome 115:c9862fd0c689 46
WiredHome 115:c9862fd0c689 47 /* Decompressor object structure */
WiredHome 115:c9862fd0c689 48 typedef struct JDEC JDEC;
WiredHome 115:c9862fd0c689 49 struct JDEC {
WiredHome 115:c9862fd0c689 50 uint16_t dctr; /* Number of bytes available in the input buffer */
WiredHome 115:c9862fd0c689 51 uint8_t * dptr; /* Current data read ptr */
WiredHome 115:c9862fd0c689 52 uint8_t * inbuf; /* Bit stream input buffer */
WiredHome 115:c9862fd0c689 53 uint8_t dmsk; /* Current bit in the current read byte */
WiredHome 115:c9862fd0c689 54 uint8_t scale; /* Output scaling ratio */
WiredHome 115:c9862fd0c689 55 uint8_t msx, msy; /* MCU size in unit of block (width, height) */
WiredHome 115:c9862fd0c689 56 uint8_t qtid[3]; /* Quantization table ID of each component */
WiredHome 115:c9862fd0c689 57 int16_t dcv[3]; /* Previous DC element of each component */
WiredHome 115:c9862fd0c689 58 uint16_t nrst; /* Restart inverval */
WiredHome 115:c9862fd0c689 59 uint16_t width, height; /* Size of the input image (pixel) */
WiredHome 115:c9862fd0c689 60 uint8_t * huffbits[2][2]; /* Huffman bit distribution tables [id][dcac] */
WiredHome 115:c9862fd0c689 61 uint16_t * huffcode[2][2]; /* Huffman code word tables [id][dcac] */
WiredHome 115:c9862fd0c689 62 uint8_t * huffdata[2][2]; /* Huffman decoded data tables [id][dcac] */
WiredHome 115:c9862fd0c689 63 int32_t * qttbl[4]; /* Dequaitizer tables [id] */
WiredHome 115:c9862fd0c689 64 void * workbuf; /* Working buffer for IDCT and RGB output */
WiredHome 115:c9862fd0c689 65 uint8_t * mcubuf; /* Working buffer for the MCU */
WiredHome 115:c9862fd0c689 66 void * pool; /* Pointer to available memory pool */
WiredHome 115:c9862fd0c689 67 uint16_t sz_pool; /* Size of momory pool (bytes available) */
WiredHome 115:c9862fd0c689 68 uint16_t (*infunc)(JDEC * jd, uint8_t * buffer, uint16_t bufsize);/* Pointer to jpeg stream input function */
WiredHome 115:c9862fd0c689 69 void * device; /* Pointer to I/O device identifiler for the session */
WiredHome 115:c9862fd0c689 70 };
WiredHome 115:c9862fd0c689 71
WiredHome 115:c9862fd0c689 72
WiredHome 115:c9862fd0c689 73 #endif /* _TJPGDEC */
WiredHome 115:c9862fd0c689 74
WiredHome 115:c9862fd0c689 75 #endif // GraphicsDisplayJPEG_H