diff --git a/libpixelflinger/picker.cpp b/libpixelflinger/picker.cpp
new file mode 100644
index 0000000..030ef19
--- /dev/null
+++ b/libpixelflinger/picker.cpp
@@ -0,0 +1,173 @@
+/* libs/pixelflinger/picker.cpp
+**
+** Copyright 2006, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License"); 
+** you may not use this file except in compliance with the License. 
+** You may obtain a copy of the License at 
+**
+**     http://www.apache.org/licenses/LICENSE-2.0 
+**
+** Unless required by applicable law or agreed to in writing, software 
+** distributed under the License is distributed on an "AS IS" BASIS, 
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+** See the License for the specific language governing permissions and 
+** limitations under the License.
+*/
+
+
+#include <stdio.h>
+
+#include "buffer.h"
+#include "scanline.h"
+#include "picker.h"
+
+namespace android {
+
+// ----------------------------------------------------------------------------
+
+void ggl_init_picker(context_t* c)
+{
+}
+
+void ggl_pick(context_t* c)
+{
+    if (ggl_likely(!c->dirty))
+        return;
+        
+    // compute needs, see if they changed...
+    const uint32_t enables = c->state.enables;
+    needs_t new_needs(c->state.needs);
+
+    if (c->dirty & GGL_CB_STATE) {
+        new_needs.n &= ~GGL_NEEDS_CB_FORMAT_MASK;
+        new_needs.n |= GGL_BUILD_NEEDS(c->state.buffers.color.format, CB_FORMAT);
+        if (enables & GGL_ENABLE_BLENDING)
+            c->dirty |= GGL_PIXEL_PIPELINE_STATE;
+    }
+
+    if (c->dirty & GGL_PIXEL_PIPELINE_STATE) {
+        uint32_t n = GGL_BUILD_NEEDS(c->state.buffers.color.format, CB_FORMAT);
+        uint32_t p = 0;
+        if (enables & GGL_ENABLE_BLENDING) {
+            uint32_t src = c->state.blend.src;
+            uint32_t dst = c->state.blend.dst;
+            uint32_t src_alpha = c->state.blend.src_alpha;
+            uint32_t dst_alpha = c->state.blend.dst_alpha;
+            const GGLFormat& cbf = c->formats[ c->state.buffers.color.format ];
+            if (!cbf.c[GGLFormat::ALPHA].h) {
+                if ((src == GGL_ONE_MINUS_DST_ALPHA) ||
+                    (src == GGL_DST_ALPHA)) {
+                    src = GGL_ONE;
+                }
+                if ((src_alpha == GGL_ONE_MINUS_DST_ALPHA) ||
+                    (src_alpha == GGL_DST_ALPHA)) {
+                    src_alpha = GGL_ONE;
+                }
+                if ((dst == GGL_ONE_MINUS_DST_ALPHA) ||
+                    (dst == GGL_DST_ALPHA)) {
+                    dst = GGL_ONE;
+                }
+                if ((dst_alpha == GGL_ONE_MINUS_DST_ALPHA) ||
+                    (dst_alpha == GGL_DST_ALPHA)) {
+                    dst_alpha = GGL_ONE;
+                }
+            }
+
+            src       = ggl_blendfactor_to_needs(src);
+            dst       = ggl_blendfactor_to_needs(dst);
+            src_alpha = ggl_blendfactor_to_needs(src_alpha);
+            dst_alpha = ggl_blendfactor_to_needs(dst_alpha);
+                    
+            n |= GGL_BUILD_NEEDS( src, BLEND_SRC );
+            n |= GGL_BUILD_NEEDS( dst, BLEND_DST );
+            if (c->state.blend.alpha_separate) {
+                n |= GGL_BUILD_NEEDS( src_alpha, BLEND_SRCA );
+                n |= GGL_BUILD_NEEDS( dst_alpha, BLEND_DSTA );
+            } else {
+                n |= GGL_BUILD_NEEDS( src, BLEND_SRCA );
+                n |= GGL_BUILD_NEEDS( dst, BLEND_DSTA );
+            }
+        } else {
+            n |= GGL_BUILD_NEEDS( GGL_ONE,  BLEND_SRC );
+            n |= GGL_BUILD_NEEDS( GGL_ZERO, BLEND_DST );
+            n |= GGL_BUILD_NEEDS( GGL_ONE,  BLEND_SRCA );
+            n |= GGL_BUILD_NEEDS( GGL_ZERO, BLEND_DSTA );
+        }
+
+
+        n |= GGL_BUILD_NEEDS(c->state.mask.color^0xF,               MASK_ARGB);
+        n |= GGL_BUILD_NEEDS((enables & GGL_ENABLE_SMOOTH)  ?1:0,   SHADE);
+        if (enables & GGL_ENABLE_TMUS) {
+            n |= GGL_BUILD_NEEDS((enables & GGL_ENABLE_W)       ?1:0,   W);
+        }
+        p |= GGL_BUILD_NEEDS((enables & GGL_ENABLE_DITHER)  ?1:0,   P_DITHER);
+        p |= GGL_BUILD_NEEDS((enables & GGL_ENABLE_AA)      ?1:0,   P_AA);
+        p |= GGL_BUILD_NEEDS((enables & GGL_ENABLE_FOG)     ?1:0,   P_FOG);
+
+        if (enables & GGL_ENABLE_LOGIC_OP) {
+            n |= GGL_BUILD_NEEDS(c->state.logic_op.opcode, LOGIC_OP);
+        } else {
+            n |= GGL_BUILD_NEEDS(GGL_COPY, LOGIC_OP);
+        }
+
+        if (enables & GGL_ENABLE_ALPHA_TEST) {
+            p |= GGL_BUILD_NEEDS(c->state.alpha_test.func, P_ALPHA_TEST);
+        } else {
+            p |= GGL_BUILD_NEEDS(GGL_ALWAYS, P_ALPHA_TEST);
+        }
+
+        if (enables & GGL_ENABLE_DEPTH_TEST) {
+            p |= GGL_BUILD_NEEDS(c->state.depth_test.func, P_DEPTH_TEST);
+            p |= GGL_BUILD_NEEDS(c->state.mask.depth&1, P_MASK_Z);
+        } else {
+            p |= GGL_BUILD_NEEDS(GGL_ALWAYS, P_DEPTH_TEST);
+            // writing to the z-buffer is always disabled if depth-test
+            // is disabled.
+        }
+        new_needs.n = n;
+        new_needs.p = p;
+    }
+
+    if (c->dirty & GGL_TMU_STATE) {
+        int idx = 0;
+        for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; ++i) {
+            const texture_t& tx = c->state.texture[i];
+            if (tx.enable) {
+                uint32_t t = 0;
+                t |= GGL_BUILD_NEEDS(tx.surface.format, T_FORMAT);
+                t |= GGL_BUILD_NEEDS(ggl_env_to_needs(tx.env), T_ENV);
+                t |= GGL_BUILD_NEEDS(0, T_POT);       // XXX: not used yet
+                if (tx.s_coord==GGL_ONE_TO_ONE && tx.t_coord==GGL_ONE_TO_ONE) {
+                    // we encode 1-to-1 into the wrap mode
+                    t |= GGL_BUILD_NEEDS(GGL_NEEDS_WRAP_11, T_S_WRAP);
+                    t |= GGL_BUILD_NEEDS(GGL_NEEDS_WRAP_11, T_T_WRAP);
+                } else {
+                    t |= GGL_BUILD_NEEDS(ggl_wrap_to_needs(tx.s_wrap), T_S_WRAP);
+                    t |= GGL_BUILD_NEEDS(ggl_wrap_to_needs(tx.t_wrap), T_T_WRAP);
+                }
+                if (tx.mag_filter == GGL_LINEAR) {
+                    t |= GGL_BUILD_NEEDS(1, T_LINEAR);
+                }
+                if (tx.min_filter == GGL_LINEAR) {
+                    t |= GGL_BUILD_NEEDS(1, T_LINEAR);
+                }
+                new_needs.t[idx++] = t;
+            } else {
+                new_needs.t[i] = 0;
+            }
+        }
+    }
+
+    if (new_needs != c->state.needs) {
+        c->state.needs = new_needs;
+        ggl_pick_texture(c);
+        ggl_pick_cb(c);
+        ggl_pick_scanline(c);
+    }
+    c->dirty = 0;
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+