png_add.rar_ png_add_linux 图片 合并_png_合并图片_图片合并

#include <stdio.h> #include <stdlib.h> #include <png.h> int paper_height = 2339; int paper_width = 1654; struct rgb { unsigned char r , g , b ; } rgb; struct rgb sample_line[2339][1654]; struct rgb ALL_line[2339][1654]; void read_paper_file(const char* filename) { int bufferwidth; int pixelformat; int unknown; png_structp png_ptr; png_infop info_ptr; unsigned int sig_read = 0; png_uint_32 width, height; int bit_depth, color_type, interlace_type, x, y; u32* line; FILE *fp; if ((fp = fopen(filename, "rb")) == NULL) return ; png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); if (png_ptr == NULL) { fclose(fp); return ; } png_set_error_fn(png_ptr, (png_voidp) NULL, (png_error_ptr) NULL, user_warning_fn); info_ptr = png_create_info_struct(png_ptr); if (info_ptr == NULL) { fclose(fp); png_destroy_read_struct(&png_ptr, png_infopp_NULL, png_infopp_NULL); return ; } png_init_io(png_ptr, fp); png_set_sig_bytes(png_ptr, sig_read); png_read_info(png_ptr, info_ptr); png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type, &interlace_type, int_p_NULL, int_p_NULL); png_set_strip_16(png_ptr); png_set_packing(png_ptr); if (color_type == PNG_COLOR_TYPE_PALETTE) png_set_palette_to_rgb(png_ptr); if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8) png_set_gray_1_2_4_to_8(png_ptr); if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) png_set_tRNS_to_alpha(png_ptr); png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER); line = (u32*) malloc(width * 4); if (!line) { fclose(fp); png_destroy_read_struct(&png_ptr, png_infopp_NULL, png_infopp_NULL); return ; } for (y = 0; y < height; y++) { png_read_row(png_ptr, (u8*) line, png_bytep_NULL); for (x = 0; x < width; x++) { u32 color32 = line[x]; u16 color16; int r = color32 & 0xff; int g = (color32 >> 8) & 0xff; int b = (color32 >> 16) & 0xff; } } free(line); png_read_end(png_ptr, info_ptr); png_destroy_read_struct(&png_ptr, &info_ptr, png_infopp_NULL); fclose(fp); } void process_buffers() { int i, j; for (i = 0;i < 576;i++) for (j = 0;j < 2160;j++) { all_image_buffer[i + 585][j + 1440] = image_buffer[i][j]; } } void write_finish_file(const char* filename) { int bufferwidth; int pixelformat; int unknown; int i, x, y; png_structp png_ptr; png_infop info_ptr; FILE* fp; u8* line; fp = fopen(filename, "wb"); if (!fp) return ; png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); if (!png_ptr) return ; info_ptr = png_create_info_struct(png_ptr); if (!info_ptr) { png_destroy_write_struct(&png_ptr, (png_infopp)NULL); fclose(fp); return ; } png_init_io(png_ptr, fp); png_set_IHDR(png_ptr, info_ptr, SCREEN_WIDTH, SCREEN_HEIGHT, 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); png_write_info(png_ptr, info_ptr); line = (u8*) malloc(SCREEN_WIDTH * 3); for (y = 0; y < SCREEN_HEIGHT; y++) { for (i = 0, x = 0; x < SCREEN_WIDTH; x++) { line[i++] = r; line[i++] = g; line[i++] = b; } png_write_row(png_ptr, line); } free(line); png_write_end(png_ptr, info_ptr); png_destroy_write_struct(&png_ptr, (png_infopp)NULL); fclose(fp); } int main(void) { image_height = 576; image_width = 720; read_sample_file("sample.png"); read_paper_file("paper.png"); process_buffers(); write_finish_file("finish.png"); return 0; }