alphard/stable-diffusion.cpp
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feat: support RGBA image input of flexible size (#212)

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* Support png image and resize image with 64 pixels in img2img mode

* update the error information

---------

Co-authored-by: leejet <leejet714@gmail.com>
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delldu 2024-04-02 12:29:18 +08:00 committed by GitHub
parent 90e9178d18
commit ccae95aec9
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1 changed files with 34 additions and 6 deletions
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examples/cli/main.cpp
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@ -17,6 +17,8 @@
#define STB_IMAGE_WRITE_STATIC
#include "stb_image_write.h"
#include "stb_image_resize.h"
const char* rng_type_to_str[] = {
"std_default",
"cuda",
@ -663,21 +665,47 @@ int main(int argc, const char* argv[]) {
fprintf(stderr, "load image from '%s' failed\n", params.input_path.c_str());
return 1;
}
if (c != 3) {
fprintf(stderr, "input image must be a 3 channels RGB image, but got %d channels\n", c);
if (c < 3) {
fprintf(stderr, "the number of channels for the input image must be >= 3, but got %d channels\n", c);
free(input_image_buffer);
return 1;
}
if (params.width <= 0 || params.width % 64 != 0) {
fprintf(stderr, "error: the width of image must be a multiple of 64\n");
if (params.width <= 0) {
fprintf(stderr, "error: the width of image must be greater than 0\n");
free(input_image_buffer);
return 1;
}
if (params.height <= 0 || params.height % 64 != 0) {
fprintf(stderr, "error: the height of image must be a multiple of 64\n");
if (params.height <= 0) {
fprintf(stderr, "error: the height of image must be greater than 0\n");
free(input_image_buffer);
return 1;
}
// Resize input image ...
if (params.height % 64 != 0 || params.width % 64 != 0) {
int resized_height = params.height + (64 - params.height % 64);
int resized_width = params.width + (64 - params.width % 64);
uint8_t *resized_image_buffer = (uint8_t *)malloc(resized_height * resized_width * 3);
if (resized_image_buffer == NULL) {
fprintf(stderr, "error: allocate memory for resize input image\n");
free(input_image_buffer);
return 1;
}
stbir_resize(input_image_buffer, params.width, params.height, 0,
resized_image_buffer, resized_width, resized_height, 0, STBIR_TYPE_UINT8,
3 /*RGB channel*/, STBIR_ALPHA_CHANNEL_NONE, 0,
STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP,
STBIR_FILTER_BOX, STBIR_FILTER_BOX,
STBIR_COLORSPACE_SRGB, nullptr
);
// Save resized result
free(input_image_buffer);
input_image_buffer = resized_image_buffer;
params.height = resized_height;
params.width = resized_width;
}
}
sd_ctx_t* sd_ctx = new_sd_ctx(params.model_path.c_str(),