mtmd : add vision support for llama 4 (ggml-org#13282)

* wip llama 4 conversion

* rm redundant __init__

* fix conversion

* fix conversion

* test impl

* try this

* reshape patch_embeddings_0

* fix view

* rm ffn_post_norm

* cgraph ok

* f32 for pos embd

* add image marker tokens

* Llama4UnfoldConvolution

* correct pixel shuffle

* fix merge conflicts

* correct

* add debug_graph

* logits matched, but it still preceives the image incorrectly

* fix style

* add image_grid_pinpoints

* handle llama 4 preprocessing

* rm load_image_size

* rm unused line

* fix

* small fix 2

* add test & docs

* fix llava-1.6 test

* test: add notion of huge models

* add comment

* add warn about degraded quality

Author: ngxson

convert_hf_to_gguf.py

@@ -308,6 +308,7 @@ def prepare_tensors(self):
                             gguf.MODEL_TENSOR.TIME_MIX_LERP_FUSED,
                             gguf.MODEL_TENSOR.POSNET_NORM1,
                             gguf.MODEL_TENSOR.POSNET_NORM2,
+                            gguf.MODEL_TENSOR.V_ENC_EMBD_POS,
                         )
                     )
                     or not new_name.endswith(".weight")
@@ -2092,6 +2093,26 @@ def modify_tensors(self, data_torch: Tensor, name: str, bid: int | None):
         return super().modify_tensors(data_torch, name, bid)
 
 
+@ModelBase.register("Llama4ForConditionalGeneration")
+class Llama4VisionModel(VisionModel):
+    def set_gguf_parameters(self):
+        super().set_gguf_parameters()
+        self.gguf_writer.add_vision_projector_type(gguf.VisionProjectorType.LLAMA4)
+        self.gguf_writer.add_vision_attention_layernorm_eps(self.hparams["norm_eps"])
+        self.gguf_writer.add_vision_projector_scale_factor(int(1.0 / self.hparams["pixel_shuffle_ratio"]))
+        assert self.hparams["hidden_act"] == "gelu"
+        self.gguf_writer.add_vision_use_gelu(True)
+
+    def modify_tensors(self, data_torch: Tensor, name: str, bid: int | None) -> Iterable[tuple[str, Tensor]]:
+        del bid # unused
+        if "multi_modal_projector" in name or "vision_model" in name:
+            # process vision tensors
+            if "positional_embedding_vlm" in name and ".weight" not in name:
+                name += ".weight"
+            return [(self.map_tensor_name(name), data_torch)]
+        return []
+
+
 @ModelBase.register("Mistral3ForConditionalGeneration")
 class Mistral3Model(LlamaModel):
     model_arch = gguf.MODEL_ARCH.LLAMA

docs/multimodal.md

@@ -74,4 +74,7 @@ NOTE: some models may require large context window, for example: `-c 8192`
 (tool_name) -hf ggml-org/InternVL3-2B-Instruct-GGUF
 (tool_name) -hf ggml-org/InternVL3-8B-Instruct-GGUF
 (tool_name) -hf ggml-org/InternVL3-14B-Instruct-GGUF
+
+# Llama 4 Scout
+(tool_name) -hf ggml-org/Llama-4-Scout-17B-16E-Instruct-GGUF
 ```

gguf-py/gguf/constants.py

@@ -482,14 +482,15 @@ class MODEL_TENSOR(IntEnum):
     V_ENC_EMBD_CLS       = auto()
     V_ENC_EMBD_PATCH     = auto()
     V_ENC_EMBD_POS       = auto()
+    V_ENC_INPUT_NORM     = auto()
     V_ENC_ATTN_Q         = auto()
     V_ENC_ATTN_Q_NORM    = auto()
     V_ENC_ATTN_K         = auto()
     V_ENC_ATTN_K_NORM    = auto()
     V_ENC_ATTN_V         = auto()
-    V_ENC_INPUT_NORM     = auto()
-    V_ENC_OUTPUT         = auto()
-    V_ENC_OUTPUT_NORM    = auto()
+    V_ENC_ATTN_O         = auto()
+    V_ENC_ATTN_O_NORM    = auto()
+    V_ENC_POST_ATTN_NORM = auto()
     V_ENC_FFN_UP         = auto()
     V_ENC_FFN_GATE       = auto()
     V_ENC_FFN_DOWN       = auto()
@@ -749,8 +750,9 @@ class MODEL_TENSOR(IntEnum):
     MODEL_TENSOR.V_ENC_ATTN_K_NORM:         "v.blk.{bid}.attn_k_norm",
     MODEL_TENSOR.V_ENC_ATTN_V:              "v.blk.{bid}.attn_v",
     MODEL_TENSOR.V_ENC_INPUT_NORM:          "v.blk.{bid}.ln1",
-    MODEL_TENSOR.V_ENC_OUTPUT:              "v.blk.{bid}.attn_out",
-    MODEL_TENSOR.V_ENC_OUTPUT_NORM:         "v.blk.{bid}.ln2",
+    MODEL_TENSOR.V_ENC_ATTN_O:              "v.blk.{bid}.attn_out",
+    MODEL_TENSOR.V_ENC_ATTN_O_NORM:         "v.blk.{bid}.attn_out_norm",
+    MODEL_TENSOR.V_ENC_POST_ATTN_NORM:      "v.blk.{bid}.ln2",
     MODEL_TENSOR.V_ENC_FFN_UP:              "v.blk.{bid}.ffn_up",
     MODEL_TENSOR.V_ENC_FFN_GATE:            "v.blk.{bid}.ffn_gate",
     MODEL_TENSOR.V_ENC_FFN_DOWN:            "v.blk.{bid}.ffn_down",
@@ -785,14 +787,15 @@ class MODEL_TENSOR(IntEnum):
         MODEL_TENSOR.V_ENC_EMBD_CLS,
         MODEL_TENSOR.V_ENC_EMBD_PATCH,
         MODEL_TENSOR.V_ENC_EMBD_POS,
+        MODEL_TENSOR.V_ENC_INPUT_NORM,
         MODEL_TENSOR.V_ENC_ATTN_Q,
         MODEL_TENSOR.V_ENC_ATTN_Q_NORM,
         MODEL_TENSOR.V_ENC_ATTN_K,
         MODEL_TENSOR.V_ENC_ATTN_K_NORM,
         MODEL_TENSOR.V_ENC_ATTN_V,
-        MODEL_TENSOR.V_ENC_INPUT_NORM,
-        MODEL_TENSOR.V_ENC_OUTPUT,
-        MODEL_TENSOR.V_ENC_OUTPUT_NORM,
+        MODEL_TENSOR.V_ENC_ATTN_O,
+        MODEL_TENSOR.V_ENC_ATTN_O_NORM,
+        MODEL_TENSOR.V_ENC_POST_ATTN_NORM,
         MODEL_TENSOR.V_ENC_FFN_UP,
         MODEL_TENSOR.V_ENC_FFN_GATE,
         MODEL_TENSOR.V_ENC_FFN_DOWN,
@@ -2180,6 +2183,7 @@ class VisionProjectorType:
     GEMMA3 = "gemma3"
     IDEFICS3 = "idefics3"
     PIXTRAL = "pixtral"
+    LLAMA4 = "llama4"
     QWEN2VL = "qwen2vl_merger"
     QWEN25VL = "qwen2.5vl_merger"
     INTERNVL = "internvl"

gguf-py/gguf/tensor_mapping.py

@@ -902,10 +902,12 @@ class TensorNameMap:
 
         MODEL_TENSOR.V_MMPROJ_FC: (
             "model.connector.modality_projection.proj", # SmolVLM
+            "multi_modal_projector.linear_1", # llama 4
         ),
 
         MODEL_TENSOR.V_MMPROJ_MLP: (
             "model.mm_projector.mlp.mlp.{bid}",
+            "vision_model.vision_adapter.mlp.fc{bid}", # llama 4
             "mlp1.{bid}", # InternVL
         ),
 
@@ -915,26 +917,30 @@ class TensorNameMap:
 
         MODEL_TENSOR.V_ENC_EMBD_CLS: (
             "vision_tower.vision_model.embeddings.class_embedding",
+            "vision_model.class_embedding", # llama 4
         ),
 
         MODEL_TENSOR.V_ENC_EMBD_PATCH: (
             "vision_tower.vision_model.embeddings.patch_embedding",
             "vpm.embeddings.patch_embedding",
             "model.vision_model.embeddings.patch_embedding", # SmolVLM
             "vision_tower.patch_conv", # pixtral
+            "vision_model.patch_embedding.linear", # llama 4
             "visual.patch_embed.proj", # qwen2vl
         ),
 
         MODEL_TENSOR.V_ENC_EMBD_POS: (
             "vision_tower.vision_model.embeddings.position_embedding",
             "vpm.embeddings.position_embedding",
             "model.vision_model.embeddings.position_embedding", # SmolVLM
+            "vision_model.positional_embedding_vlm", # llama 4
         ),
 
         MODEL_TENSOR.V_ENC_ATTN_Q: (
             "vision_tower.vision_model.encoder.layers.{bid}.self_attn.q_proj",
             "vpm.encoder.layers.{bid}.self_attn.q_proj",
             "model.vision_model.encoder.layers.{bid}.self_attn.q_proj", # SmolVLM
+            "vision_model.model.layers.{bid}.self_attn.q_proj", # llama4
             "vision_tower.transformer.layers.{bid}.attention.q_proj", # pixtral
             "visual.blocks.{bid}.attn.q", # qwen2vl, generated
         ),
@@ -947,6 +953,7 @@ class TensorNameMap:
             "vision_tower.vision_model.encoder.layers.{bid}.self_attn.k_proj",
             "vpm.encoder.layers.{bid}.self_attn.k_proj",
             "model.vision_model.encoder.layers.{bid}.self_attn.k_proj", # SmolVLM
+            "vision_model.model.layers.{bid}.self_attn.k_proj", # llama4
             "vision_tower.transformer.layers.{bid}.attention.k_proj", # pixtral
             "visual.blocks.{bid}.attn.k", # qwen2vl, generated
         ),
@@ -959,6 +966,7 @@ class TensorNameMap:
             "vision_tower.vision_model.encoder.layers.{bid}.self_attn.v_proj",
             "vpm.encoder.layers.{bid}.self_attn.v_proj",
             "model.vision_model.encoder.layers.{bid}.self_attn.v_proj", # SmolVLM
+            "vision_model.model.layers.{bid}.self_attn.v_proj", # llama4
             "vision_tower.transformer.layers.{bid}.attention.v_proj", # pixtral
             "visual.blocks.{bid}.attn.v", # qwen2vl, generated
         ),
@@ -969,23 +977,26 @@ class TensorNameMap:
             "vpm.encoder.layers.{bid}.layer_norm1",
             "model.vision_model.encoder.layers.{bid}.layer_norm1", # SmolVLM
             "vision_tower.transformer.layers.{bid}.attention_norm", # pixtral
+            "vision_model.model.layers.{bid}.input_layernorm", # llama4
             "visual.blocks.{bid}.norm1", # qwen2vl
         ),
 
-        MODEL_TENSOR.V_ENC_OUTPUT: (
+        MODEL_TENSOR.V_ENC_ATTN_O: (
             "vision_tower.vision_model.encoder.layers.{bid}.self_attn.out_proj",
             "vision_tower.vision_model.encoder.layers.{bid}.attn.proj", # InternVL
             "vpm.encoder.layers.{bid}.self_attn.out_proj",
             "model.vision_model.encoder.layers.{bid}.self_attn.out_proj", # SmolVLM
+            "vision_model.model.layers.{bid}.self_attn.o_proj", # llama4
             "vision_tower.transformer.layers.{bid}.attention.o_proj", # pixtral
             "visual.blocks.{bid}.attn.proj", # qwen2vl
         ),
 
-        MODEL_TENSOR.V_ENC_OUTPUT_NORM: (
+        MODEL_TENSOR.V_ENC_POST_ATTN_NORM: (
             "vision_tower.vision_model.encoder.layers.{bid}.layer_norm2",
             "vision_tower.vision_model.encoder.layers.{bid}.norm2", # InternVL
             "vpm.encoder.layers.{bid}.layer_norm2",
             "model.vision_model.encoder.layers.{bid}.layer_norm2", # SmolVLM
+            "vision_model.model.layers.{bid}.post_attention_layernorm", # llama4
             "vision_tower.transformer.layers.{bid}.ffn_norm", # pixtral
             "visual.blocks.{bid}.norm2", # qwen2vl
         ),
@@ -995,6 +1006,7 @@ class TensorNameMap:
             "vpm.encoder.layers.{bid}.mlp.fc1",
             "model.vision_model.encoder.layers.{bid}.mlp.fc1", # SmolVLM, gemma3
             "vision_tower.transformer.layers.{bid}.feed_forward.up_proj", # pixtral
+            "vision_model.model.layers.{bid}.mlp.fc1", # llama4
             "visual.blocks.{bid}.mlp.fc1", # qwen2vl
             "visual.blocks.{bid}.mlp.up_proj", # qwen2.5vl
         ),
@@ -1009,6 +1021,7 @@ class TensorNameMap:
             "vpm.encoder.layers.{bid}.mlp.fc2",
             "model.vision_model.encoder.layers.{bid}.mlp.fc2", # SmolVLM, gemma3
             "vision_tower.transformer.layers.{bid}.feed_forward.down_proj", # pixtral
+            "vision_model.model.layers.{bid}.mlp.fc2", # llama4
             "visual.blocks.{bid}.mlp.fc2", # qwen2vl
             "visual.blocks.{bid}.mlp.down_proj", # qwen2.5vl
         ),
@@ -1024,11 +1037,13 @@ class TensorNameMap:
         MODEL_TENSOR.V_PRE_NORM: (
             "vision_tower.vision_model.pre_layrnorm",
             "vision_tower.ln_pre", # pixtral
+            "vision_model.layernorm_pre", # llama4
         ),
 
         MODEL_TENSOR.V_POST_NORM: (
             "vision_tower.vision_model.post_layernorm",
             "model.vision_model.post_layernorm", # SmolVLM
+            "vision_model.layernorm_post", # llama4
             "visual.merger.ln_q", # qwen2vl
         ),
 

tools/mtmd/clip-impl.h

@@ -4,6 +4,7 @@
 
 #include <climits>
 #include <cstdarg>
+#include <cinttypes>
 #include <string>
 #include <map>
 #include <sstream>
@@ -44,7 +45,7 @@
 // tensor name constants
 //
 
-#define TN_POS_EMBD        "%s.position_embd.weight"
+#define TN_POS_EMBD        "v.position_embd.weight"
 #define TN_CLASS_EMBD      "v.class_embd"
 #define TN_PATCH_EMBD      "v.patch_embd.weight"  // not rename tensor with ".0" postfix for backwrad compat
 #define TN_PATCH_EMBD_1    "v.patch_embd.weight.1"
@@ -110,6 +111,7 @@ enum projector_type {
     PROJECTOR_TYPE_PIXTRAL,
     PROJECTOR_TYPE_QWEN25VL,
     PROJECTOR_TYPE_INTERNVL,
+    PROJECTOR_TYPE_LLAMA4,
     PROJECTOR_TYPE_UNKNOWN,
 };
 
@@ -125,6 +127,7 @@ static std::map<projector_type, std::string> PROJECTOR_TYPE_NAMES = {
     { PROJECTOR_TYPE_IDEFICS3,  "idefics3"},
     { PROJECTOR_TYPE_PIXTRAL,   "pixtral"},
     { PROJECTOR_TYPE_INTERNVL,  "internvl"},
+    { PROJECTOR_TYPE_LLAMA4,    "llama4"},
 };
 
 static projector_type clip_projector_type_from_string(const std::string & str) {
@@ -240,6 +243,11 @@ struct clip_image_u8_batch {
 struct clip_image_f32_batch {
     std::vector<clip_image_f32_ptr> entries;
 
+    // for llava-uhd style models, we need to know the grid size
+    // note: entries.size() == grid_x * grid_y + 1 (one overview image)
+    int grid_x = 0;
+    int grid_y = 0;
+
     clip_image_f32_batch clone() const {
         clip_image_f32_batch new_batch;
         new_batch.entries.reserve(entries.size());
@@ -358,6 +366,70 @@ static std::string gguf_kv_to_str(const struct gguf_context * ctx_gguf, int i) {
     }
 }
 
+//
+// debugging
+//
+
+static void print_tensor_shape(ggml_tensor * t) {
+    printf("%s.shape = [", t->name);
+    for (int i = 0; i < ggml_n_dims(t); ++i) {
+        printf("%" PRId64, t->ne[i]);
+        if (i < ggml_n_dims(t) - 1) {
+            printf(", ");
+        }
+    }
+    printf("]\n");
+}
+
+static void print_tensor_data(ggml_tensor * t, uint8_t * data, int64_t n) {
+    ggml_type type = t->type;
+    int64_t * ne = t->ne;
+    size_t * nb = t->nb;
+    for (int64_t i3 = 0; i3 < ne[3]; i3++) {
+        printf("%s.data: [\n", t->name);
+        for (int64_t i2 = 0; i2 < ne[2]; i2++) {
+            if (i2 == n && ne[2] > 2*n) {
+                printf("     ..., \n");
+                i2 = ne[2] - n;
+            }
+            printf("     [\n");
+            for (int64_t i1 = 0; i1 < ne[1]; i1++) {
+                if (i1 == n && ne[1] > 2*n) {
+                    printf("      ..., \n");
+                    i1 = ne[1] - n;
+                }
+                printf("      [");
+                for (int64_t i0 = 0; i0 < ne[0]; i0++) {
+                    if (i0 == n && ne[0] > 2*n) {
+                        printf("..., ");
+                        i0 = ne[0] - n;
+                    }
+                    size_t i = i3 * nb[3] + i2 * nb[2] + i1 * nb[1] + i0 * nb[0];
+                    float v;
+                    if (type == GGML_TYPE_F16) {
+                        v = ggml_fp16_to_fp32(*(ggml_fp16_t *) &data[i]);
+                    } else if (type == GGML_TYPE_F32) {
+                        v = *(float *) &data[i];
+                    } else if (type == GGML_TYPE_I32) {
+                        v = (float) *(int32_t *) &data[i];
+                    } else if (type == GGML_TYPE_I16) {
+                        v = (float) *(int16_t *) &data[i];
+                    } else if (type == GGML_TYPE_I8) {
+                        v = (float) *(int8_t *) &data[i];
+                    } else {
+                        GGML_ABORT("fatal error");
+                    }
+                    printf("%8.4f", v);
+                    if (i0 < ne[0] - 1) printf(", ");
+                }
+                printf("],\n");
+            }
+            printf("     ],\n");
+        }
+        printf("    ]\n");
+    }
+}
+
 //
 // API used internally with mtmd
 //