diff options
Diffstat (limited to 'recipes/png-util/files/png_util.cpp')
| -rwxr-xr-x | recipes/png-util/files/png_util.cpp | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/recipes/png-util/files/png_util.cpp b/recipes/png-util/files/png_util.cpp new file mode 100755 index 0000000..2736202 --- /dev/null +++ b/recipes/png-util/files/png_util.cpp @@ -0,0 +1,179 @@ +#include "png_util.h" + +static int x, y; +static int width, height; + +static png_byte color_type; +static png_byte bit_depth; + +static png_structp png_ptr; +static png_infop info_ptr; +static int number_of_passes; +static png_bytep * row_pointers = 0; +static png_bytep row_pointers_bit_shift = 0; +static int row_byte_len = 0; + +//#define UNIT_TEST 1 +#ifdef UNIT_TEST +int fd = open("/tmp/dump.txt", O_WRONLY|O_CREAT|O_LARGEFILE, 0644); +#endif + +static int read_png_file(char* file_name) +{ + /* 8 is the maximum size that can be checked */ + char header[8] = {0,}; + + /* open file and test for it being a png */ + FILE *fp = fopen(file_name, "rb"); + if (!fp) + { + fprintf(stderr, "[read_png_file] File %s could not be opened for reading\n", file_name); + return 0; + } + + fread(header, 1, 8, fp); + if (png_sig_cmp((png_byte*)header, 0, 8)) + { + fprintf(stderr, "[read_png_file] File %s is not recognized as a PNG file\n", file_name); + return 0; + } + + /* initialize stuff */ + png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + + if (!png_ptr) + { + fprintf(stderr, "[read_png_file] png_create_read_struct failed\n"); + return 0; + } + + info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) + { + fprintf(stderr, "[read_png_file] png_create_info_struct failed\n"); + return 0; + } + + if (setjmp(png_jmpbuf(png_ptr))) + { + fprintf(stderr, "[read_png_file] Error during init_io\n"); + return 0; + } + + png_init_io(png_ptr, fp); + png_set_sig_bytes(png_ptr, 8); + + png_read_info(png_ptr, info_ptr); + + width = png_get_image_width(png_ptr, info_ptr); + height = png_get_image_height(png_ptr, info_ptr); + color_type = png_get_color_type(png_ptr, info_ptr); + bit_depth = png_get_bit_depth(png_ptr, info_ptr); + + number_of_passes = png_set_interlace_handling(png_ptr); + png_read_update_info(png_ptr, info_ptr); + + /* read file */ + if (setjmp(png_jmpbuf(png_ptr))) + { + fprintf(stderr, "[read_png_file] Error during read_image\n"); + return 0; + } + + if(row_pointers == 0) + { + row_pointers = (png_bytep*) malloc(sizeof(png_bytep) * height); + row_byte_len = png_get_rowbytes(png_ptr,info_ptr); + for (y=0; y<height; y++) + { + row_pointers[y] = (png_byte*) malloc(row_byte_len); + } + row_pointers_bit_shift = (unsigned char*) malloc(sizeof(unsigned char) * height * width * 2); + } + + png_read_image(png_ptr, row_pointers); + fclose(fp); + return 1; +} + +PNGUtil *PNGUtil::instance = 0; + +PNGUtil::PNGUtil() +{ + instance = this; + device_fd = -1; +} + +PNGUtil::~PNGUtil() +{ + disconnect(); +} + +PNGUtil *PNGUtil::getInstance() +{ + return instance; +} + +int PNGUtil::connect() +{ + const char* device_file_name = "/dev/lcd2"; + device_fd = open("/dev/lcd2", O_RDWR); + if(device_fd <0) + return 0; + return 1; +} + +void PNGUtil::disconnect() +{ + if(device_fd >= 0) + { + close(device_fd); + device_fd = -1; + } +} + +int PNGUtil::send(char* png_file_name) +{ + if(device_fd < 0) + { + fprintf(stderr, "unloaded!! retry.. connect!!\n"); + return 0; + } + if(!read_png_file(png_file_name)) + { + return 0; + } + { + + int i,j; + int row_pointers_ptr = 0; + int row_pointers_2_ptr = 0; + + for(i=0;i<height;i++) + { + for(j=0;j<row_byte_len;j+=3) + { + row_pointers_bit_shift[row_pointers_2_ptr]=(row_pointers[i][j]&248)|(row_pointers[i][j+1]>>5); + row_pointers_bit_shift[row_pointers_2_ptr+1]=((row_pointers[i][j+1]&28)<<3)|(row_pointers[i][j+2]>>3); + row_pointers_2_ptr += 2; + } + } + } +#ifdef UNIT_TEST + { + int w = write(fd, row_pointers_bit_shift , height * width * 2); + printf("write to dst_fd : %d\n",w); + } +#endif +#ifndef UNIT_TEST + { + int w=-1; + w = write(device_fd, row_pointers_bit_shift, height * width * 2); + printf("write ret : %d\n",w); +// ret = ioctl(device_fd, 0); + printf("write to /dev/lcd2 : %d\n",w); + } +#endif + return 1; +} + |