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#include "drape/texture_of_colors.hpp"
#include "base/shared_buffer_manager.hpp"
#include "base/stl_add.hpp"
#include "std/cstring.hpp"
namespace dp
{
namespace
{
int const RESOURCE_SIZE = 2;
int const BYTES_PER_PIXEL = 4;
}
ColorPalette::ColorPalette(m2::PointU const & canvasSize)
: m_textureSize(canvasSize)
, m_cursor(m2::PointU::Zero())
{}
RefPointer<Texture::ResourceInfo> ColorPalette::MapResource(ColorKey const & key)
{
TPalette::iterator itm = m_palette.find(key.m_color);
if (itm == m_palette.end())
{
PendingColor pendingColor;
pendingColor.m_color = key.m_color;
pendingColor.m_rect = m2::RectU(m_cursor.x, m_cursor.y,
m_cursor.x + RESOURCE_SIZE, m_cursor.y + RESOURCE_SIZE);
m_pendingNodes.push_back(pendingColor);
m_cursor.x += RESOURCE_SIZE;
if (m_cursor.x >= m_textureSize.x)
{
m_cursor.y += RESOURCE_SIZE;
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 = m_palette.emplace(key.m_color, ColorResourceInfo(m2::RectF(x, y, x, y)));
ASSERT(res.second, ());
itm = res.first;
}
return MakeStackRefPointer<Texture::ResourceInfo>(&itm->second);
}
void ColorPalette::UploadResources(RefPointer<Texture> texture)
{
ASSERT(texture->GetFormat() == dp::RGBA8, ());
if (m_pendingNodes.empty())
return;
buffer_vector<size_t, 3> ranges;
ranges.push_back(0);
uint32_t minX = m_pendingNodes[0].m_rect.minX();
for (size_t i = 0; i < m_pendingNodes.size(); ++i)
{
m2::RectU const & currentRect = m_pendingNodes[i].m_rect;
if (minX > currentRect.minX())
{
ranges.push_back(i);
minX = currentRect.minX();
}
}
ranges.push_back(m_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 = m_pendingNodes[startRange].m_rect;
m2::RectU const & endRect = m_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 pixelStride = uploadRect.SizeX();
size_t byteCount = BYTES_PER_PIXEL * uploadRect.SizeX() * uploadRect.SizeY();
size_t bufferSize = my::NextPowOf2(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 = m_pendingNodes[j];
if (c.m_rect.minY() > currentY)
{
pointer += BYTES_PER_PIXEL * pixelStride;
currentY = c.m_rect.minY();
}
uint32_t byteStride = pixelStride * BYTES_PER_PIXEL;
uint8_t red = c.m_color.GetRed();
uint8_t green = c.m_color.GetGreen();
uint8_t blue = c.m_color.GetBlue();
uint8_t alfa = c.m_color.GetAlfa();
pointer[0] = pointer[4] = red;
pointer[1] = pointer[5] = green;
pointer[2] = pointer[6] = blue;
pointer[3] = pointer[7] = alfa;
pointer[byteStride + 0] = pointer[byteStride + 4] = red;
pointer[byteStride + 1] = pointer[byteStride + 5] = green;
pointer[byteStride + 2] = pointer[byteStride + 6] = blue;
pointer[byteStride + 3] = pointer[byteStride + 7] = alfa;
pointer += 2 * BYTES_PER_PIXEL;
ASSERT(pointer <= SharedBufferManager::GetRawPointer(buffer) + byteCount, ());
}
pointer = SharedBufferManager::GetRawPointer(buffer);
texture->UploadData(uploadRect.minX(), uploadRect.minY(), uploadRect.SizeX(), uploadRect.SizeY(),
dp::RGBA8, dp::MakeStackRefPointer<void>(pointer));
}
m_pendingNodes.clear();
}
glConst ColorPalette::GetMinFilter() const
{
return gl_const::GLNearest;
}
glConst ColorPalette::GetMagFilter() const
{
return gl_const::GLNearest;
}
void ColorPalette::MoveCursor()
{
m_cursor.x += RESOURCE_SIZE;
if (m_cursor.x >= m_textureSize.x)
{
m_cursor.y += RESOURCE_SIZE;
m_cursor.x = 0;
}
ASSERT(m_cursor.y + RESOURCE_SIZE <= m_textureSize.y, ());
}
}
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