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// Copyright 2018 The SwiftShader Authors. All Rights Reserved.
//
// 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 "XcbSurfaceKHR.hpp"
#include "Vulkan/VkDeviceMemory.hpp"
#include "Vulkan/VkImage.hpp"
#include "System/SharedLibrary.hpp"
#include <memory>
namespace {
template<typename FPTR>
void getFuncAddress(void *lib, const char *name, FPTR *out)
{
*out = reinterpret_cast<FPTR>(getProcAddress(lib, name));
}
struct LibXcbExports
{
LibXcbExports(void *lib)
{
getFuncAddress(lib, "xcb_create_gc", &xcb_create_gc);
getFuncAddress(lib, "xcb_flush", &xcb_flush);
getFuncAddress(lib, "xcb_free_gc", &xcb_free_gc);
getFuncAddress(lib, "xcb_generate_id", &xcb_generate_id);
getFuncAddress(lib, "xcb_get_geometry", &xcb_get_geometry);
getFuncAddress(lib, "xcb_get_geometry_reply", &xcb_get_geometry_reply);
getFuncAddress(lib, "xcb_put_image", &xcb_put_image);
}
xcb_void_cookie_t (*xcb_create_gc)(xcb_connection_t *c, xcb_gcontext_t cid, xcb_drawable_t drawable, uint32_t value_mask, const void *value_list);
int (*xcb_flush)(xcb_connection_t *c);
xcb_void_cookie_t (*xcb_free_gc)(xcb_connection_t *c, xcb_gcontext_t gc);
uint32_t (*xcb_generate_id)(xcb_connection_t *c);
xcb_get_geometry_cookie_t (*xcb_get_geometry)(xcb_connection_t *c, xcb_drawable_t drawable);
xcb_get_geometry_reply_t *(*xcb_get_geometry_reply)(xcb_connection_t *c, xcb_get_geometry_cookie_t cookie, xcb_generic_error_t **e);
xcb_void_cookie_t (*xcb_put_image)(xcb_connection_t *c, uint8_t format, xcb_drawable_t drawable, xcb_gcontext_t gc, uint16_t width, uint16_t height, int16_t dst_x, int16_t dst_y, uint8_t left_pad, uint8_t depth, uint32_t data_len, const uint8_t *data);
};
class LibXcb
{
public:
operator bool()
{
return loadExports();
}
LibXcbExports *operator->()
{
return loadExports();
}
private:
LibXcbExports *loadExports()
{
static auto exports = [] {
if(getProcAddress(RTLD_DEFAULT, "xcb_create_gc"))
{
return std::make_unique<LibXcbExports>(RTLD_DEFAULT);
}
if(auto lib = loadLibrary("libxcb.so.1"))
{
return std::make_unique<LibXcbExports>(lib);
}
return std::unique_ptr<LibXcbExports>();
}();
return exports.get();
}
};
LibXcb libXcb;
bool getWindowSizeAndDepth(xcb_connection_t *connection, xcb_window_t window, VkExtent2D *windowExtent, int *depth)
{
auto cookie = libXcb->xcb_get_geometry(connection, window);
if(auto *geom = libXcb->xcb_get_geometry_reply(connection, cookie, nullptr))
{
windowExtent->width = static_cast<uint32_t>(geom->width);
windowExtent->height = static_cast<uint32_t>(geom->height);
*depth = static_cast<int>(geom->depth);
free(geom);
return true;
}
return false;
}
} // anonymous namespace
namespace vk {
bool XcbSurfaceKHR::hasLibXCB()
{
return libXcb;
}
XcbSurfaceKHR::XcbSurfaceKHR(const VkXcbSurfaceCreateInfoKHR *pCreateInfo, void *mem)
: connection(pCreateInfo->connection)
, window(pCreateInfo->window)
{
}
void XcbSurfaceKHR::destroySurface(const VkAllocationCallbacks *pAllocator)
{
}
size_t XcbSurfaceKHR::ComputeRequiredAllocationSize(const VkXcbSurfaceCreateInfoKHR *pCreateInfo)
{
return 0;
}
VkResult XcbSurfaceKHR::getSurfaceCapabilities(VkSurfaceCapabilitiesKHR *pSurfaceCapabilities) const
{
setCommonSurfaceCapabilities(pSurfaceCapabilities);
VkExtent2D extent;
int depth;
if(!getWindowSizeAndDepth(connection, window, &extent, &depth))
{
return VK_ERROR_SURFACE_LOST_KHR;
}
pSurfaceCapabilities->currentExtent = extent;
pSurfaceCapabilities->minImageExtent = extent;
pSurfaceCapabilities->maxImageExtent = extent;
return VK_SUCCESS;
}
void XcbSurfaceKHR::attachImage(PresentImage *image)
{
auto gc = libXcb->xcb_generate_id(connection);
uint32_t values[2] = { 0, 0xffffffff };
libXcb->xcb_create_gc(connection, gc, window, XCB_GC_FOREGROUND | XCB_GC_BACKGROUND, values);
graphicsContexts[image] = gc;
}
void XcbSurfaceKHR::detachImage(PresentImage *image)
{
auto it = graphicsContexts.find(image);
if(it != graphicsContexts.end())
{
libXcb->xcb_free_gc(connection, it->second);
graphicsContexts.erase(it);
}
}
VkResult XcbSurfaceKHR::present(PresentImage *image)
{
auto it = graphicsContexts.find(image);
if(it != graphicsContexts.end())
{
VkExtent2D windowExtent;
int depth;
if(!getWindowSizeAndDepth(connection, window, &windowExtent, &depth))
{
return VK_ERROR_SURFACE_LOST_KHR;
}
const VkExtent3D &extent = image->getImage()->getExtent();
if(windowExtent.width != extent.width || windowExtent.height != extent.height)
{
return VK_ERROR_OUT_OF_DATE_KHR;
}
// TODO: Convert image if not RGB888.
int stride = image->getImage()->rowPitchBytes(VK_IMAGE_ASPECT_COLOR_BIT, 0);
auto buffer = reinterpret_cast<uint8_t *>(image->getImageMemory()->getOffsetPointer(0));
size_t bufferSize = extent.height * stride;
libXcb->xcb_put_image(
connection,
XCB_IMAGE_FORMAT_Z_PIXMAP,
window,
it->second,
extent.width,
extent.height,
0, 0, // dst x, y
0, // left_pad
depth,
bufferSize, // data_len
buffer // data
);
libXcb->xcb_flush(connection);
}
return VK_SUCCESS;
}
} // namespace vk