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+/*****************************************************************************
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+* | File : GUI_BMPfile.c
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+* | Author : Waveshare team
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+* | Function : Hardware underlying interface
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+* | Info :
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+* Used to shield the underlying layers of each master
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+* and enhance portability
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+*----------------
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+* | This version: V2.1
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+* | Date : 2019-03-29
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+* | Info :
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+* 1.Change file name: GUI_BMP.c -> GUI_BMPfile.c
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+* 2.fix: GUI_ReadBmp()
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+* Now Xstart and Xstart can control the position of the picture normally,
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+* and support the display of images of any size. If it is larger than
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+* the actual display range, it will not be displayed.
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+* 3.fix:line87 &bmprgbquad[i * 4] =》 &bmprgbquad[i]
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+*
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+* Permission is hereby granted, free of charge, to any person obtaining a copy
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+* of this software and associated documnetation files (the "Software"), to deal
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+* in the Software without restriction, including without limitation the rights
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+* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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+* copies of the Software, and to permit persons to whom the Software is
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+* furished to do so, subject to the following conditions:
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+*
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+* The above copyright notice and this permission notice shall be included in
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+* all copies or substantial portions of the Software.
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+*
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+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+* FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+* LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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+* THE SOFTWARE.
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+*
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+******************************************************************************/
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+
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+#include "GUI_BMPfile.h"
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+#include "GUI_Paint.h"
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+#include "Debug.h"
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+
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+#include <fcntl.h>
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+#include <unistd.h>
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+#include <stdint.h>
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+#include <stdlib.h> //exit()
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+#include <string.h> //memset()
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+#include <math.h> //memset()
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+
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+UBYTE GUI_ReadBmp(const char *path, UWORD Xstart, UWORD Ystart)
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+{
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+ FILE *fp; //Define a file pointer
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+ BMPFILEHEADER bmpFileHeader; //Define a bmp file header structure
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+ BMPINFOHEADER bmpInfoHeader; //Define a bmp info header structure
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+
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+
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+ // Binary file open
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+ if((fp = fopen(path, "rb")) == NULL) {
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+ Debug("Cann't open the file!\n");
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+ exit(0);
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+ }
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+
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+ // Set the file pointer from the beginning
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+ fseek(fp, 0, SEEK_SET);
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+ fread(&bmpFileHeader, sizeof(BMPFILEHEADER), 1, fp); //sizeof(BMPFILEHEADER) must be 14
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+ fread(&bmpInfoHeader, sizeof(BMPINFOHEADER), 1, fp); //sizeof(BMPFILEHEADER) must be 50
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+ printf("pixel = %d * %d\r\n", bmpInfoHeader.biWidth, bmpInfoHeader.biHeight);
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+
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+ UWORD Image_Width_Byte = (bmpInfoHeader.biWidth % 8 == 0)? (bmpInfoHeader.biWidth / 8): (bmpInfoHeader.biWidth / 8 + 1);
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+ UWORD Bmp_Width_Byte = (Image_Width_Byte % 4 == 0) ? Image_Width_Byte: ((Image_Width_Byte / 4 + 1) * 4);
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+ UBYTE Image[Image_Width_Byte * bmpInfoHeader.biHeight];
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+ memset(Image, 0xFF, Image_Width_Byte * bmpInfoHeader.biHeight);
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+
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+ // Determine if it is a monochrome bitmap
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+ int readbyte = bmpInfoHeader.biBitCount;
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+ if(readbyte != 1){
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+ Debug("the bmp Image is not a monochrome bitmap!\n");
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+ exit(0);
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+ }
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+
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+ // Determine black and white based on the palette
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+ UWORD i;
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+ UWORD Bcolor, Wcolor;
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+ UWORD bmprgbquadsize = pow(2, bmpInfoHeader.biBitCount);// 2^1 = 2
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+ BMPRGBQUAD bmprgbquad[bmprgbquadsize]; //palette
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+
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+ for(i = 0; i < bmprgbquadsize; i++){
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+ // fread(&bmprgbquad[i * 4], sizeof(BMPRGBQUAD), 1, fp);
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+ fread(&bmprgbquad[i], sizeof(BMPRGBQUAD), 1, fp);
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+ }
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+ if(bmprgbquad[0].rgbBlue == 0xff && bmprgbquad[0].rgbGreen == 0xff && bmprgbquad[0].rgbRed == 0xff){
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+ Bcolor = BLACK;
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+ Wcolor = WHITE;
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+ }else{
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+ Bcolor = WHITE;
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+ Wcolor = BLACK;
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+ }
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+
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+ // Read image data into the cache
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+ UWORD x, y;
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+ UBYTE Rdata;
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+ fseek(fp, bmpFileHeader.bOffset, SEEK_SET);
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+ for(y = 0; y < bmpInfoHeader.biHeight; y++) {//Total display column
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+ for(x = 0; x < Bmp_Width_Byte; x++) {//Show a line in the line
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+ if(fread((char *)&Rdata, 1, readbyte, fp) != readbyte) {
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+ perror("get bmpdata:\r\n");
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+ break;
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+ }
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+ if(x < Image_Width_Byte) { //bmp
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+ Image[x + (bmpInfoHeader.biHeight - y - 1) * Image_Width_Byte] = Rdata;
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+ // printf("rdata = %d\r\n", Rdata);
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+ }
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+ }
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+ }
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+ fclose(fp);
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+
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+ // Refresh the image to the display buffer based on the displayed orientation
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+ UBYTE color, temp;
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+ for(y = 0; y < bmpInfoHeader.biHeight; y++){
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+ for(x = 0; x < bmpInfoHeader.biWidth; x++){
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+ if(x > Paint.Width || y > Paint.Height){
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+ break;
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+ }
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+ temp = Image[(x / 8) + (y * Image_Width_Byte)];
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+ color = (((temp << (x%8)) & 0x80) == 0x80) ?Bcolor:Wcolor;
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+ Paint_SetPixel(Xstart + x, Ystart + y, color);
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+ }
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+ }
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+ return 0;
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+}
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+
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+
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hnwangkg-ezio