refactor: adjust sd h/w limit

Signed-off-by: thxCode <[email protected]>

README.md

@@ -382,7 +382,7 @@ server/images:
 
          --image-max-batch N      maximum batch count (default: 4)
          --image-max-height N     image maximum height, in pixel space, must be larger than 256 and be multiples of 64 (default: 1792)
-         --image-max-width N      image maximum width, in pixel space, must be larger than 256 and be multiples of 64 (default: 1792)
+         --image-max-width N      image maximum width, in pixel space, must be larger than 256 and be multiples of 64 (default: 1024)
          --image-guidance N       the value of guidance during the computing phase (default: 3.500000)
          --image-strength N       strength for noising, range of [0.0, 1.0] (default: 0.750000)
          --image-sampler TYPE     sampler that will be used for generation, automatically retrieve the default value according to --model, select from euler_a;euler;heun;dpm2;dpm++2s_a;dpm++2m;dpm++2mv2;ipndm;ipndm_v;lcm

llama-box/stablediffusion.hpp

@@ -16,7 +16,7 @@
 struct stablediffusion_params {
     int max_batch_count              = 4;
     int max_height                   = 1792;
-    int max_width                    = 1792;
+    int max_width                    = 1024;
     float guidance                   = 3.5f;
     float strength                   = 0.75f;
     sample_method_t sampler          = N_SAMPLE_METHODS;