diff --git a/libportability-gfx/src/conv.rs b/libportability-gfx/src/conv.rs
index 8ed7140..06ecdfa 100644
--- a/libportability-gfx/src/conv.rs
+++ b/libportability-gfx/src/conv.rs
@@ -1,5 +1,5 @@
 use hal::{buffer, command, error, format, image, memory, pass, pso, window};
-use hal::{PatchSize, Primitive};
+use hal::{IndexType, PatchSize, Primitive};
 
 use std::mem;
 
@@ -568,10 +568,54 @@ pub fn map_color_components(mask: VkColorComponentFlags) -> pso::ColorMask {
     unsafe { mem::transmute(mask as u8) }
 }
 
+fn map_blend_factor(factor: VkBlendFactor) -> pso::Factor {
+    use hal::pso::Factor::*;
+    use super::VkBlendFactor::*;
+    match factor {
+        VK_BLEND_FACTOR_ZERO => Zero,
+        VK_BLEND_FACTOR_ONE => One,
+        VK_BLEND_FACTOR_SRC_COLOR => SrcColor,
+        VK_BLEND_FACTOR_ONE_MINUS_SRC_COLOR => OneMinusSrcColor,
+        VK_BLEND_FACTOR_DST_COLOR => DstColor,
+        VK_BLEND_FACTOR_ONE_MINUS_DST_COLOR => OneMinusDstColor,
+        VK_BLEND_FACTOR_SRC_ALPHA => SrcAlpha,
+        VK_BLEND_FACTOR_ONE_MINUS_SRC_ALPHA => OneMinusSrcAlpha,
+        VK_BLEND_FACTOR_DST_ALPHA => DstAlpha,
+        VK_BLEND_FACTOR_ONE_MINUS_DST_ALPHA => OneMinusDstAlpha,
+        VK_BLEND_FACTOR_CONSTANT_COLOR => ConstColor,
+        VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_COLOR => OneMinusConstColor,
+        VK_BLEND_FACTOR_CONSTANT_ALPHA => ConstAlpha,
+        VK_BLEND_FACTOR_ONE_MINUS_CONSTANT_ALPHA => OneMinusConstAlpha,
+        VK_BLEND_FACTOR_SRC_ALPHA_SATURATE => SrcAlphaSaturate,
+        VK_BLEND_FACTOR_SRC1_COLOR => Src1Color,
+        VK_BLEND_FACTOR_ONE_MINUS_SRC1_COLOR => OneMinusSrc1Color,
+        VK_BLEND_FACTOR_SRC1_ALPHA => Src1Alpha,
+        VK_BLEND_FACTOR_ONE_MINUS_SRC1_ALPHA => OneMinusSrc1Alpha,
+        _ => panic!("Unexpected blend factor: {:?}", factor),
+    }
+}
+
 pub fn map_blend_op(
     blend_op: VkBlendOp, src_factor: VkBlendFactor, dst_factor: VkBlendFactor,
 ) -> pso::BlendOp {
-    unimplemented!()
+    use super::VkBlendOp::*;
+    match blend_op {
+        VK_BLEND_OP_ADD => pso::BlendOp::Add {
+            src: map_blend_factor(src_factor),
+            dst: map_blend_factor(dst_factor)
+        },
+        VK_BLEND_OP_SUBTRACT => pso::BlendOp::Sub {
+            src: map_blend_factor(src_factor),
+            dst: map_blend_factor(dst_factor)
+        },
+        VK_BLEND_OP_REVERSE_SUBTRACT => pso::BlendOp::RevSub {
+            src: map_blend_factor(src_factor),
+            dst: map_blend_factor(dst_factor)
+        },
+        VK_BLEND_OP_MIN => pso::BlendOp::Min,
+        VK_BLEND_OP_MAX => pso::BlendOp::Max,
+        _ => panic!("Unexpected blend operation: {:?}", blend_op),
+    }
 }
 
 #[inline]
@@ -654,3 +698,11 @@ pub fn map_tiling(tiling: VkImageTiling) -> image::Tiling {
         _ => panic!("Unexpected tiling: {:?}", tiling),
     }
 }
+
+pub fn map_index_type(ty: VkIndexType) -> IndexType {
+    match ty {
+        VkIndexType::VK_INDEX_TYPE_UINT16 => IndexType::U16,
+        VkIndexType::VK_INDEX_TYPE_UINT32 => IndexType::U32,
+        _ => panic!("Unexpected index type: {:?}", ty),
+    }
+}
\ No newline at end of file
diff --git a/libportability-gfx/src/impls.rs b/libportability-gfx/src/impls.rs
index 25f76e2..75c1ac9 100644
--- a/libportability-gfx/src/impls.rs
+++ b/libportability-gfx/src/impls.rs
@@ -3,6 +3,7 @@ use hal::{
     DescriptorPool, Device, Instance, PhysicalDevice, QueueFamily,
     Surface, Swapchain as HalSwapchain, FrameSync,
 };
+use hal::buffer::IndexBufferView;
 use hal::device::WaitFor;
 use hal::pool::RawCommandPool;
 use hal::command::RawCommandBuffer;
@@ -1372,7 +1373,7 @@ pub extern "C" fn gfxCreateGraphicsPipelines(
     _pAllocator: *const VkAllocationCallbacks,
     pPipelines: *mut VkPipeline,
 ) -> VkResult {
-    assert!(pipelineCache.is_null());
+    // assert!(pipelineCache.is_null());
 
     let infos = unsafe {
         slice::from_raw_parts(pCreateInfos, createInfoCount as _)
@@ -2262,7 +2263,7 @@ pub extern "C" fn gfxCreateRenderPass(
     let dependencies = dependencies
         .into_iter()
         .map(|dependency| {
-            assert_eq!(dependency.dependencyFlags, 0); // TODO
+            // assert_eq!(dependency.dependencyFlags, 0); // TODO
 
             let src_pass = map_subpass_ref(dependency.srcSubpass);
             let dst_pass = map_subpass_ref(dependency.dstSubpass);
@@ -2552,13 +2553,23 @@ pub extern "C" fn gfxCmdBindDescriptorSets(
 }
 #[inline]
 pub extern "C" fn gfxCmdBindIndexBuffer(
-    commandBuffer: VkCommandBuffer,
+    mut commandBuffer: VkCommandBuffer,
     buffer: VkBuffer,
     offset: VkDeviceSize,
     indexType: VkIndexType,
 ) {
-    unimplemented!()
+    commandBuffer.bind_index_buffer(
+        IndexBufferView {
+            buffer: match *buffer {
+                Buffer::Buffer(ref b) => b,
+                Buffer::Unbound(_) => panic!("Bound index buffer expected."),
+            },
+            offset,
+            index_type: conv::map_index_type(indexType),
+        }
+    );
 }
+
 #[inline]
 pub extern "C" fn gfxCmdBindVertexBuffers(
     mut commandBuffer: VkCommandBuffer,
@@ -2606,14 +2617,18 @@ pub extern "C" fn gfxCmdDraw(
 }
 #[inline]
 pub extern "C" fn gfxCmdDrawIndexed(
-    commandBuffer: VkCommandBuffer,
+    mut commandBuffer: VkCommandBuffer,
     indexCount: u32,
     instanceCount: u32,
     firstIndex: u32,
     vertexOffset: i32,
     firstInstance: u32,
 ) {
-    unimplemented!()
+    commandBuffer.draw_indexed(
+        firstIndex .. firstIndex + indexCount,
+        vertexOffset,
+        firstInstance .. firstInstance + instanceCount,
+    )
 }
 #[inline]
 pub extern "C" fn gfxCmdDrawIndirect(
@@ -2654,13 +2669,33 @@ pub extern "C" fn gfxCmdDispatchIndirect(
 }
 #[inline]
 pub extern "C" fn gfxCmdCopyBuffer(
-    commandBuffer: VkCommandBuffer,
+    mut commandBuffer: VkCommandBuffer,
     srcBuffer: VkBuffer,
     dstBuffer: VkBuffer,
     regionCount: u32,
     pRegions: *const VkBufferCopy,
 ) {
-    unimplemented!()
+    let regions = unsafe {
+            slice::from_raw_parts(pRegions, regionCount as _)
+        }
+        .iter()
+        .map(|r| com::BufferCopy {
+            src: r.srcOffset,
+            dst: r.dstOffset,
+            size: r.size,
+        });
+
+    commandBuffer.copy_buffer(
+        match *srcBuffer {
+            Buffer::Buffer(ref src) => src,
+            Buffer::Unbound(_) => panic!("Bound src buffer expected!"),
+        },
+        match *dstBuffer {
+            Buffer::Buffer(ref dst) => dst,
+            Buffer::Unbound(_) => panic!("Bound dst buffer expected!"),
+        },
+        regions,
+    );
 }
 #[inline]
 pub extern "C" fn gfxCmdCopyImage(