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fix: correct sdapi handling of reference images on txt2img #1268

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fix: correct sdapi handling of reference images on txt2img #1268

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63 changes: 32 additions & 31 deletions examples/server/main.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -914,28 +914,29 @@ int main(int argc, const char** argv) {
std::vector<sd_image_t> pmid_images;
std::vector<sd_image_t> ref_images;

if (img2img) {
auto decode_image = [](sd_image_t& image, std::string encoded) -> bool {
// remove data URI prefix if present ("data:image/png;base64,")
auto comma_pos = encoded.find(',');
if (comma_pos != std::string::npos) {
encoded = encoded.substr(comma_pos + 1);
}
std::vector<uint8_t> img_data = base64_decode(encoded);
if (!img_data.empty()) {
int img_w = image.width;
int img_h = image.height;
uint8_t* raw_data = load_image_from_memory(
(const char*)img_data.data(), (int)img_data.size(),
img_w, img_h,
image.width, image.height, image.channel);
if (raw_data) {
image = {(uint32_t)img_w, (uint32_t)img_h, image.channel, raw_data};
return true;
}
auto decode_image = [](sd_image_t& image, std::string encoded) -> bool {
// remove data URI prefix if present ("data:image/png;base64,")
auto comma_pos = encoded.find(',');
if (comma_pos != std::string::npos) {
encoded = encoded.substr(comma_pos + 1);
}
std::vector<uint8_t> img_data = base64_decode(encoded);
if (!img_data.empty()) {
int img_w = image.width;
int img_h = image.height;
uint8_t* raw_data = load_image_from_memory(
(const char*)img_data.data(), (int)img_data.size(),
img_w, img_h,
image.width, image.height, image.channel);
if (raw_data) {
image = {(uint32_t)img_w, (uint32_t)img_h, image.channel, raw_data};
return true;
}
return false;
};
}
return false;
};

if (img2img) {

if (j.contains("init_images") && j["init_images"].is_array() && !j["init_images"].empty()) {
std::string encoded = j["init_images"][0].get<std::string>();
Expand All @@ -959,23 +960,23 @@ int main(int argc, const char** argv) {
mask_image.data = mask_data.data();
}

if (j.contains("extra_images") && j["extra_images"].is_array()) {
for (auto extra_image : j["extra_images"]) {
std::string encoded = extra_image.get<std::string>();
sd_image_t tmp_image = {(uint32_t)gen_params.width, (uint32_t)gen_params.height, 3, nullptr};
if (decode_image(tmp_image, encoded)) {
ref_images.push_back(tmp_image);
}
}
}

float denoising_strength = j.value("denoising_strength", -1.f);
if (denoising_strength >= 0.f) {
denoising_strength = std::min(denoising_strength, 1.0f);
gen_params.strength = denoising_strength;
}
}

if (j.contains("extra_images") && j["extra_images"].is_array()) {
for (auto extra_image : j["extra_images"]) {
std::string encoded = extra_image.get<std::string>();
sd_image_t tmp_image = {(uint32_t)gen_params.width, (uint32_t)gen_params.height, 3, nullptr};
if (decode_image(tmp_image, encoded)) {
ref_images.push_back(tmp_image);
}
}
}

sd_img_gen_params_t img_gen_params = {
sd_loras.data(),
static_cast<uint32_t>(sd_loras.size()),
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