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#include "drape/texture_of_colors.hpp"
#include "base/shared_buffer_manager.hpp"
#include "base/stl_helpers.hpp"
#include <cstring>
namespace dp
{
namespace
{
int const kResourceSize = 2;
int const kBytesPerPixel = 4;
}
ColorPalette::ColorPalette(m2::PointU const & canvasSize)
: m_textureSize(canvasSize)
, m_cursor(m2::PointU::Zero())
{}
ref_ptr<Texture::ResourceInfo> ColorPalette::ReserveResource(bool predefined, ColorKey const & key, bool & newResource)
{
std::lock_guard<std::mutex> lock(m_mappingLock);
TPalette & palette = predefined ? m_predefinedPalette : m_palette;
TPalette::iterator itm = palette.find(key.m_color);
newResource = (itm == palette.end());
if (newResource)
{
PendingColor pendingColor;
pendingColor.m_color = key.m_color;
pendingColor.m_rect = m2::RectU(m_cursor.x, m_cursor.y,
m_cursor.x + kResourceSize, m_cursor.y + kResourceSize);
{
std::lock_guard<std::mutex> g(m_lock);
m_pendingNodes.push_back(pendingColor);
}
m_cursor.x += kResourceSize;
if (m_cursor.x >= m_textureSize.x)
{
m_cursor.y += kResourceSize;
m_cursor.x = 0;
ASSERT(m_cursor.y < m_textureSize.y, ());
}
float const sizeX = static_cast<float>(m_textureSize.x);
float const sizeY = static_cast<float>(m_textureSize.y);
m2::PointF const resCenter = m2::RectF(pendingColor.m_rect).Center();
float const x = resCenter.x / sizeX;
float const y = resCenter.y / sizeY;
auto res = palette.emplace(key.m_color, ColorResourceInfo(m2::RectF(x, y, x, y)));
ASSERT(res.second, ());
itm = res.first;
}
return make_ref(&itm->second);
}
ref_ptr<Texture::ResourceInfo> ColorPalette::MapResource(ColorKey const & key, bool & newResource)
{
TPalette::iterator itm = m_predefinedPalette.find(key.m_color);
if (itm != m_predefinedPalette.end())
{
newResource = false;
return make_ref(&itm->second);
}
return ReserveResource(false /* predefined */, key, newResource);
}
void ColorPalette::UploadResources(ref_ptr<dp::GraphicsContext> context, ref_ptr<Texture> texture)
{
ASSERT(texture->GetFormat() == dp::TextureFormat::RGBA8, ());
buffer_vector<PendingColor, 16> pendingNodes;
{
std::lock_guard<std::mutex> g(m_lock);
if (m_pendingNodes.empty())
return;
m_pendingNodes.swap(pendingNodes);
}
buffer_vector<size_t, 3> ranges;
ranges.push_back(0);
uint32_t minX = pendingNodes[0].m_rect.minX();
for (size_t i = 0; i < pendingNodes.size(); ++i)
{
m2::RectU const & currentRect = pendingNodes[i].m_rect;
if (minX > currentRect.minX())
{
ranges.push_back(i);
minX = currentRect.minX();
}
}
ranges.push_back(pendingNodes.size());
for (size_t i = 1; i < ranges.size(); ++i)
{
size_t startRange = ranges[i - 1];
size_t endRange = ranges[i];
m2::RectU const & startRect = pendingNodes[startRange].m_rect;
m2::RectU const & endRect = pendingNodes[endRange - 1].m_rect;
m2::RectU uploadRect;
if (startRect.minY() == endRect.minY() &&
startRect.maxY() == endRect.maxY())
{
uploadRect = m2::RectU(startRect.minX(), startRect.minY(), endRect.maxX(), endRect.maxY());
}
else
{
ASSERT(startRect.minX() == 0, ());
uploadRect = m2::RectU(0, startRect.minY(), m_textureSize.x, endRect.maxY());
}
size_t const pixelStride = uploadRect.SizeX();
size_t const byteCount = kBytesPerPixel * uploadRect.SizeX() * uploadRect.SizeY();
size_t const bufferSize = static_cast<size_t>(base::NextPowOf2(static_cast<uint32_t>(byteCount)));
SharedBufferManager::shared_buffer_ptr_t buffer = SharedBufferManager::instance().reserveSharedBuffer(bufferSize);
uint8_t * pointer = SharedBufferManager::GetRawPointer(buffer);
if (m_isDebug)
memset(pointer, 0, bufferSize);
uint32_t currentY = startRect.minY();
for (size_t j = startRange; j < endRange; ++j)
{
ASSERT(pointer < SharedBufferManager::GetRawPointer(buffer) + byteCount, ());
PendingColor const & c = pendingNodes[j];
if (c.m_rect.minY() > currentY)
{
pointer += kBytesPerPixel * pixelStride;
currentY = c.m_rect.minY();
}
uint32_t const byteStride = static_cast<uint32_t>(pixelStride * kBytesPerPixel);
uint8_t const red = c.m_color.GetRed();
uint8_t const green = c.m_color.GetGreen();
uint8_t const blue = c.m_color.GetBlue();
uint8_t const alpha = c.m_color.GetAlpha();
for (size_t row = 0; row < kResourceSize; row++)
{
for (size_t column = 0; column < kResourceSize; column++)
{
pointer[row * byteStride + column * kBytesPerPixel] = red;
pointer[row * byteStride + column * kBytesPerPixel + 1] = green;
pointer[row * byteStride + column * kBytesPerPixel + 2] = blue;
pointer[row * byteStride + column * kBytesPerPixel + 3] = alpha;
}
}
pointer += kResourceSize * kBytesPerPixel;
ASSERT(pointer <= SharedBufferManager::GetRawPointer(buffer) + byteCount, ());
}
pointer = SharedBufferManager::GetRawPointer(buffer);
texture->UploadData(context, uploadRect.minX(), uploadRect.minY(),
uploadRect.SizeX(), uploadRect.SizeY(), make_ref(pointer));
}
}
void ColorTexture::ReserveColor(dp::Color const & color)
{
bool newResource = false;
m_indexer->ReserveResource(true /* predefined */, ColorKey(color), newResource);
}
int ColorTexture::GetColorSizeInPixels()
{
return kResourceSize;
}
}
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