优化打印算法

main/control_plane/src/rest_server.c

@@ -64,7 +64,7 @@ static const char *s_web_index =
     "    </div>\n"
     "\n"
     "    <label>Z-Image Prompt</label>\n"
-    "    <textarea id='imagePrompt'>一只坐在窗边的橘猫，午后阳光，胶片质感，写实风格。</textarea>\n"
+    "    <textarea id='imagePrompt'>一只可爱橘猫正脸特写，黑白线稿风格，白色背景，主体居中，边缘清晰，细节简洁。</textarea>\n"
     "    <div class='row'>\n"
     "      <select id='imgSize' style='max-width:180px'>\n"
     "        <option value='1024*1024'>1024*1024</option>\n"
@@ -121,6 +121,7 @@ static const char *s_web_index =
     "    const imgScaleToWidthEl = document.getElementById('imgScaleToWidth');\n"
     "    const imgInvertEl = document.getElementById('imgInvert');\n"
     "    const imgPromptExtendEl = document.getElementById('imgPromptExtend');\n"
+    "    const thermalPromptSuffix = 'black and white line art, pure white background, high contrast, clean edges, minimal texture, no dark background, no heavy shadows, centered subject, thermal printer friendly';\n"
     "\n"
     "    function log(obj) {\n"
     "      if (typeof obj === 'string') {\n"
@@ -152,8 +153,13 @@ static const char *s_web_index =
     "        throw new Error('please input image prompt');\n"
     "      }\n"
     "\n"
+    "      const mergedPrompt = prompt + '\\n\\n' + thermalPromptSuffix;\n"
+    "      if (mergedPrompt.length > 800) {\n"
+    "        throw new Error('prompt too long after thermal optimization, please shorten it');\n"
+    "      }\n"
+    "\n"
     "      return {\n"
-    "        prompt,\n"
+    "        prompt: mergedPrompt,\n"
     "        size: imgSizeEl.value || '1120*1440',\n"
     "        prompt_extend: imgPromptExtendEl.checked,\n"
     "        threshold: toInt(imgThresholdEl.value, 160, 0, 255),\n"