scratchfoundation/bgfx
1
0
Fork 0
mirror of https://github.com/scratchfoundation/bgfx.git synced 2024-11-28 18:45:54 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

D3D12: Texture read-back.

Browse source
This commit is contained in:
Branimir Karadžić 2015-10-26 20:37:15 -07:00
parent 9429d46f1c
commit 47aeaf49a9
1 changed files with 57 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

58
src/renderer_d3d12.cpp
View file

@ -884,6 +884,7 @@ namespace bgfx { namespace d3d12
| (m_options.ROVsSupported ? BGFX_CAPS_FRAGMENT_ORDERING : 0)
// | BGFX_CAPS_SWAP_CHAIN
| BGFX_CAPS_TEXTURE_BLIT
| BGFX_CAPS_TEXTURE_READ_BACK
);
g_caps.maxTextureSize = 16384;
g_caps.maxFBAttachments = uint8_t(bx::uint32_min(16, BGFX_CONFIG_MAX_FRAME_BUFFER_ATTACHMENTS) );
@ -1273,8 +1274,63 @@ namespace bgfx { namespace d3d12
{
}
void readTexture(TextureHandle /*_handle*/, void* /*_data*/) BX_OVERRIDE
void readTexture(TextureHandle _handle, void* _data) BX_OVERRIDE
{
const TextureD3D12& texture = m_textures[_handle.idx];
D3D12_RESOURCE_DESC desc = texture.m_ptr->GetDesc();
D3D12_PLACED_SUBRESOURCE_FOOTPRINT layout;
uint32_t numRows;
uint64_t total;
uint64_t srcPitch;
m_device->GetCopyableFootprints(&desc
, 0
, 1
, 0
, &layout
, &numRows
, &srcPitch
, &total
);
ID3D12Resource* readback = createCommittedResource(m_device, HeapProperty::ReadBack, total);
D3D12_BOX box;
box.left = 0;
box.top = 0;
box.right = texture.m_width;
box.bottom = texture.m_height;
box.front = 0;
box.back = 1;
D3D12_TEXTURE_COPY_LOCATION dstLocation = { readback, D3D12_TEXTURE_COPY_TYPE_PLACED_FOOTPRINT, { layout } };
D3D12_TEXTURE_COPY_LOCATION srcLocation = { texture.m_ptr, D3D12_TEXTURE_COPY_TYPE_SUBRESOURCE_INDEX, {} };
m_commandList->CopyTextureRegion(&dstLocation, 0, 0, 0, &srcLocation, &box);
finish();
m_commandList = m_cmd.alloc();
uint8_t* src;
readback->Map(0, NULL, (void**)&src);
const uint8_t bpp = getBitsPerPixel(TextureFormat::Enum(texture.m_textureFormat) );
uint8_t* dst = (uint8_t*)_data;
uint32_t dstPitch = texture.m_width*bpp/8;
uint32_t pitch = bx::uint32_min(uint32_t(srcPitch), dstPitch);
for (uint32_t yy = 0, height = texture.m_height; yy < height; ++yy)
{
memcpy(dst, src, pitch);
src += srcPitch;
dst += dstPitch;
}
readback->Unmap(0, NULL);
DX_RELEASE(readback, 0);
}
void resizeTexture(TextureHandle _handle, uint16_t _width, uint16_t _height) BX_OVERRIDE