132 lines
5.1 KiB
C
132 lines
5.1 KiB
C
/*****************************************************************************
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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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#include "GUI_BMPfile.h"
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#include "GUI_Paint.h"
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#include "Debug.h"
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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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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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// 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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// 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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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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// 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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// 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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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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// 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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// 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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