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#include "drape/stipple_pen_resource.hpp"
#include "drape/texture.hpp"
#include "base/shared_buffer_manager.hpp"
#include <cstring>
#include <iomanip>
#include <numeric>
#include <sstream>
namespace dp
{
uint32_t const kMaxStipplePenLength = 512;
uint32_t const kStippleHeight = 1;
StipplePenPacker::StipplePenPacker(m2::PointU const & canvasSize)
: m_canvasSize(canvasSize)
, m_currentRow(0)
{
ASSERT_GREATER_OR_EQUAL(canvasSize.x, kMaxStipplePenLength, ());
}
m2::RectU StipplePenPacker::PackResource(uint32_t width)
{
ASSERT_LESS(m_currentRow, m_canvasSize.y, ());
ASSERT_LESS_OR_EQUAL(width, m_canvasSize.x, ());
uint32_t yOffset = m_currentRow;
m_currentRow += kStippleHeight;
return m2::RectU(0, yOffset, width, yOffset + kStippleHeight);
}
m2::RectF StipplePenPacker::MapTextureCoords(m2::RectU const & pixelRect) const
{
return m2::RectF((pixelRect.minX() + 0.5f) / m_canvasSize.x,
(pixelRect.minY() + 0.5f) / m_canvasSize.y,
(pixelRect.maxX() - 0.5f) / m_canvasSize.x,
(pixelRect.maxY() - 0.5f) / m_canvasSize.y);
}
StipplePenHandle::StipplePenHandle(buffer_vector<uint8_t, 8> const & pattern)
: m_keyValue(0)
{
Init(pattern);
}
StipplePenHandle::StipplePenHandle(StipplePenKey const & info)
: m_keyValue(0)
{
Init(info.m_pattern);
}
void StipplePenHandle::Init(buffer_vector<uint8_t, 8> const & pattern)
{
// encoding scheme
// 63 - 61 bits = size of pattern in range [0 : 8]
// 60 - 53 bits = first value of pattern in range [1 : 128]
// 52 - 45 bits = second value of pattern
// ....
// 0 - 5 bits = reserved
ASSERT(pattern.size() >= 1 && pattern.size() < 9, (pattern.size()));
uint32_t const patternSize = static_cast<uint32_t>(pattern.size());
m_keyValue = patternSize - 1; // we code value 1 as 000 and value 8 as 111
for (size_t i = 0; i < patternSize; ++i)
{
m_keyValue <<=7;
ASSERT_GREATER(pattern[i], 0, ()); // we have 7 bytes for value. value = 1 encode like 0000000
ASSERT_LESS(pattern[i], 129, ()); // value = 128 encode like 1111111
uint32_t value = pattern[i] - 1;
m_keyValue += value;
}
m_keyValue <<= ((8 - patternSize) * 7 + 5);
}
StipplePenRasterizator::StipplePenRasterizator(StipplePenKey const & key)
: m_key(key)
{
m_patternLength = std::accumulate(m_key.m_pattern.begin(), m_key.m_pattern.end(), 0);
uint32_t const availableSize = kMaxStipplePenLength - 2; // the first and the last pixel reserved
ASSERT_LESS(m_patternLength, availableSize, ());
uint32_t const count = floor(availableSize / m_patternLength);
m_pixelLength = count * m_patternLength;
}
uint32_t StipplePenRasterizator::GetSize() const
{
return m_pixelLength;
}
uint32_t StipplePenRasterizator::GetPatternSize() const
{
return m_patternLength;
}
void StipplePenRasterizator::Rasterize(void * buffer)
{
ASSERT(!m_key.m_pattern.empty(), ());
uint8_t * pixels = static_cast<uint8_t *>(buffer);
uint16_t offset = 1;
buffer_vector<uint8_t, 8> pattern = m_key.m_pattern;
for (size_t i = 0; i < pattern.size(); ++i)
{
uint8_t value = (i & 0x1) == 0 ? 255 : 0;
uint8_t length = m_key.m_pattern[i];
memset(pixels + offset, value, length * sizeof(uint8_t));
offset += length;
}
uint8_t period = offset - 1;
while (offset < m_pixelLength + 1)
{
memcpy(pixels + offset, pixels + 1, period);
offset += period;
}
ASSERT_LESS(offset, kMaxStipplePenLength, ());
pixels[0] = pixels[1];
pixels[offset] = pixels[offset - 1];
}
ref_ptr<Texture::ResourceInfo> StipplePenIndex::ReserveResource(bool predefined, StipplePenKey const & key,
bool & newResource)
{
std::lock_guard<std::mutex> g(m_mappingLock);
newResource = false;
StipplePenHandle handle(key);
TResourceMapping & resourceMapping = predefined ? m_predefinedResourceMapping : m_resourceMapping;
TResourceMapping::iterator it = resourceMapping.find(handle);
if (it != resourceMapping.end())
return make_ref(&it->second);
newResource = true;
StipplePenRasterizator resource(key);
m2::RectU pixelRect = m_packer.PackResource(resource.GetSize());
{
std::lock_guard<std::mutex> g(m_lock);
m_pendingNodes.push_back(std::make_pair(pixelRect, resource));
}
auto res = resourceMapping.emplace(handle, StipplePenResourceInfo(m_packer.MapTextureCoords(pixelRect),
resource.GetSize(),
resource.GetPatternSize()));
ASSERT(res.second, ());
return make_ref(&res.first->second);
}
ref_ptr<Texture::ResourceInfo> StipplePenIndex::MapResource(StipplePenKey const & key, bool & newResource)
{
StipplePenHandle handle(key);
TResourceMapping::iterator it = m_predefinedResourceMapping.find(handle);
if (it != m_predefinedResourceMapping.end())
{
newResource = false;
return make_ref(&it->second);
}
return ReserveResource(false /* predefined */, key, newResource);
}
void StipplePenIndex::UploadResources(ref_ptr<dp::GraphicsContext> context, ref_ptr<Texture> texture)
{
ASSERT(texture->GetFormat() == dp::TextureFormat::Alpha, ());
TPendingNodes pendingNodes;
{
std::lock_guard<std::mutex> g(m_lock);
if (m_pendingNodes.empty())
return;
m_pendingNodes.swap(pendingNodes);
}
SharedBufferManager & mng = SharedBufferManager::instance();
uint32_t const bytesPerNode = kMaxStipplePenLength * kStippleHeight;
uint32_t reserveBufferSize = base::NextPowOf2(static_cast<uint32_t>(pendingNodes.size()) * bytesPerNode);
SharedBufferManager::shared_buffer_ptr_t ptr = mng.reserveSharedBuffer(reserveBufferSize);
uint8_t * rawBuffer = SharedBufferManager::GetRawPointer(ptr);
memset(rawBuffer, 0, reserveBufferSize);
for (size_t i = 0; i < pendingNodes.size(); ++i)
pendingNodes[i].second.Rasterize(rawBuffer + i * bytesPerNode);
texture->UploadData(context, 0, pendingNodes.front().first.minY(), kMaxStipplePenLength,
static_cast<uint32_t>(pendingNodes.size()) * kStippleHeight, make_ref(rawBuffer));
mng.freeSharedBuffer(reserveBufferSize, ptr);
}
void StipplePenTexture::ReservePattern(buffer_vector<uint8_t, 8> const & pattern)
{
bool newResource = false;
m_indexer->ReserveResource(true /* predefined */, StipplePenKey(pattern), newResource);
}
std::string DebugPrint(StipplePenHandle const & key)
{
std::ostringstream out;
out << "0x" << std::hex << key.m_keyValue;
return out.str();
}
} // namespace dp
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