diff options
Diffstat (limited to 'userspace/pain')
| -rw-r--r-- | userspace/pain/Makefile | 6 | ||||
| -rw-r--r-- | userspace/pain/pain1.c | 200 |
2 files changed, 206 insertions, 0 deletions
diff --git a/userspace/pain/Makefile b/userspace/pain/Makefile new file mode 100644 index 0000000..bfa31c8 --- /dev/null +++ b/userspace/pain/Makefile @@ -0,0 +1,6 @@ +CC=i686-foolos-gcc + +pain1 : pain1.c + i686-foolos-gcc pain1.c -lpng -lz -o pain1 +clean: + -rm pain1 diff --git a/userspace/pain/pain1.c b/userspace/pain/pain1.c new file mode 100644 index 0000000..a3fb03a --- /dev/null +++ b/userspace/pain/pain1.c @@ -0,0 +1,200 @@ +// http://zarb.org/~gc/html/libpng.html + +#include "../put_pixel.h" + +#include <stdlib.h> +#include <stdio.h> + +#define dimx 640 +#define dimy 480 + +/* + * Copyright 2002-2010 Guillaume Cottenceau. + * + * This software may be freely redistributed under the terms + * of the X11 license. + * + */ + +#include <unistd.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <stdarg.h> + +#define PNG_DEBUG 3 +#include <png.h> + +void abort_(const char * s, ...) +{ + va_list args; + va_start(args, s); + vfprintf(stderr, s, args); + fprintf(stderr, "\n"); + va_end(args); + abort(); +} + +int x, y; + +int width, height; +png_byte color_type; +png_byte bit_depth; + +png_structp png_ptr; +png_infop info_ptr; +int number_of_passes; +png_bytep * row_pointers; + +void read_png_file(char* file_name) +{ + char header[8]; // 8 is the maximum size that can be checked + + /* open file and test for it being a png */ + FILE *fp = fopen(file_name, "rb"); + if (!fp) + abort_("[read_png_file] File %s could not be opened for reading", file_name); + fread(header, 1, 8, fp); + if (png_sig_cmp(header, 0, 8)) + abort_("[read_png_file] File %s is not recognized as a PNG file", file_name); + + + /* initialize stuff */ + png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + + if (!png_ptr) + abort_("[read_png_file] png_create_read_struct failed"); + + info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) + abort_("[read_png_file] png_create_info_struct failed"); + + if (setjmp(png_jmpbuf(png_ptr))) + abort_("[read_png_file] Error during init_io"); + + 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))) + abort_("[read_png_file] Error during read_image"); + + row_pointers = (png_bytep*) malloc(sizeof(png_bytep) * height); + for (y=0; y<height; y++) + row_pointers[y] = (png_byte*) malloc(png_get_rowbytes(png_ptr,info_ptr)); + + png_read_image(png_ptr, row_pointers); + + fclose(fp); +} + + +void write_png_file(char* file_name) +{ + /* create file */ + FILE *fp = fopen(file_name, "wb"); + if (!fp) + abort_("[write_png_file] File %s could not be opened for writing", file_name); + + + /* initialize stuff */ + png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); + + if (!png_ptr) + abort_("[write_png_file] png_create_write_struct failed"); + + info_ptr = png_create_info_struct(png_ptr); + if (!info_ptr) + abort_("[write_png_file] png_create_info_struct failed"); + + if (setjmp(png_jmpbuf(png_ptr))) + abort_("[write_png_file] Error during init_io"); + + png_init_io(png_ptr, fp); + + + /* write header */ + if (setjmp(png_jmpbuf(png_ptr))) + abort_("[write_png_file] Error during writing header"); + + png_set_IHDR(png_ptr, info_ptr, width, height, + bit_depth, color_type, PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + + png_write_info(png_ptr, info_ptr); + + + /* write bytes */ + if (setjmp(png_jmpbuf(png_ptr))) + abort_("[write_png_file] Error during writing bytes"); + + png_write_image(png_ptr, row_pointers); + + + /* end write */ + if (setjmp(png_jmpbuf(png_ptr))) + abort_("[write_png_file] Error during end of write"); + + png_write_end(png_ptr, NULL); + + /* cleanup heap allocation */ + for (y=0; y<height; y++) + free(row_pointers[y]); + free(row_pointers); + + fclose(fp); +} + + +void process_file(void) +{ + if (png_get_color_type(png_ptr, info_ptr) == PNG_COLOR_TYPE_RGB) + abort_("[process_file] input file is PNG_COLOR_TYPE_RGB but must be PNG_COLOR_TYPE_RGBA " + "(lacks the alpha channel)"); + + if (png_get_color_type(png_ptr, info_ptr) != PNG_COLOR_TYPE_RGBA) + abort_("[process_file] color_type of input file must be PNG_COLOR_TYPE_RGBA (%d) (is %d)", + PNG_COLOR_TYPE_RGBA, png_get_color_type(png_ptr, info_ptr)); + + for (y=0; y<height; y++) { + png_byte* row = row_pointers[y]; + for (x=0; x<width; x++) { + png_byte* ptr = &(row[x*4]); + //printf("Pixel at position [ %d - %d ] has RGBA values: %d - %d - %d - %d\n", + // x, y, ptr[0], ptr[1], ptr[2], ptr[3]); + + /* set red value to 0 and green value to the blue one */ + //ptr[0] = 0; + //ptr[1] = ptr[2]; + if(x<dimx&&y<dimy)put_pixel(x,y,ptr[2]|ptr[1]<<8|ptr[0]<<16); + + } + } +} + + +int main(int argc, char **argv) +{ + if (argc != 2) + abort_("Usage: program_name <file_in>"); + + _gui_win(); + read_png_file(argv[1]); + process_file(); + _gui_rect(); + while(1); +// write_png_file(argv[2]); + + return 0; +} |