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78 lines
2.7 KiB
C
78 lines
2.7 KiB
C
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#include "image_io.h"
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#define STB_IMAGE_IMPLEMENTATION
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#include "stb_image.h"
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#define BUFFER 512
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#define READ_IMAGE_TEMPLATE(T) \
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{ \
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int im_channels; \
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unsigned char *data = stbi_load(name, im_width, im_height, &im_channels, 1); \
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if (data == NULL) \
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{ \
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printf("ERROR: Cannot read %s\n", name); \
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exit(0); \
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} \
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*image = malloc(sizeof(**image) * (*im_width) * (*im_height)); \
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for (int i = 0; i < (*im_width) * (*im_height); ++i) \
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(*image)[i] = (T)data[i]; \
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stbi_image_free(data); \
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}
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#define WRITE_IMAGE_TEMPLATE(T) \
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{ \
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unsigned char *temp_img = malloc(sizeof(unsigned char) * im_width * im_height); \
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for (int i = 0; i < (im_width * im_height); i++) \
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temp_img[i] = image[i]; \
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write_imagec(name, temp_img, im_width, im_height); \
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free(temp_img); \
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}
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void read_image(char *name, double **image, int *im_width, int *im_height)
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{
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READ_IMAGE_TEMPLATE(double)
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}
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void read_imagef(char *name, float **image, int *im_width, int *im_height)
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{
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READ_IMAGE_TEMPLATE(float)
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}
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void read_imagei(char *name, int **image, int *im_width, int *im_height)
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{
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READ_IMAGE_TEMPLATE(int)
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}
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void read_imagec(char *name, unsigned char **image, int *im_width, int *im_height)
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{
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READ_IMAGE_TEMPLATE(char)
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}
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void write_image(char *name, double *image, int im_width, int im_height)
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{
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WRITE_IMAGE_TEMPLATE(double)
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}
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void write_imagef(char *name, float *image, int im_width, int im_height)
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{
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WRITE_IMAGE_TEMPLATE(float)
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}
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void write_imagei(char *name, int *image, int im_width, int im_height)
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{
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WRITE_IMAGE_TEMPLATE(int)
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}
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void write_imagec(char *name, unsigned char *image, int im_width, int im_height)
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{
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FILE *fop;
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int im_size = im_width * im_height;
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fop = fopen(name, "w+");
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fprintf(fop, "P5\n%d %d\n255\n", im_width, im_height);
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fwrite(image, sizeof(unsigned char), im_size, fop);
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fclose(fop);
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}
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