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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/
#include <sal/config.h>
#include <vcl/opengl/OpenGLContext.hxx>
#include <vcl/opengl/OpenGLHelper.hxx>
#include "opengl/framebuffer.hxx"
#include "opengl/texture.hxx"
#include "opengl/FixedTextureAtlas.hxx"
FixedTextureAtlasManager::FixedTextureAtlasManager(int nWidthFactor, int nHeightFactor, int nSubTextureSize)
: mWidthFactor(nWidthFactor)
, mHeightFactor(nHeightFactor)
, mSubTextureSize(nSubTextureSize)
{
}
void FixedTextureAtlasManager::CreateNewTexture()
{
int nTextureWidth = mWidthFactor * mSubTextureSize;
int nTextureHeight = mHeightFactor * mSubTextureSize;
mpTextures.push_back(std::unique_ptr<ImplOpenGLTexture>(new ImplOpenGLTexture(nTextureWidth, nTextureHeight, true)));
mpTextures.back()->InitializeSlots(mWidthFactor * mHeightFactor);
}
OpenGLTexture FixedTextureAtlasManager::InsertBuffer(int nWidth, int nHeight, int nFormat, int nType, sal_uInt8* pData)
{
ImplOpenGLTexture* pTexture = nullptr;
for (size_t i = 0; i < mpTextures.size(); i++)
{
if (mpTextures[i]->mnFreeSlots > 0)
{
pTexture = mpTextures[i].get();
}
}
if (!pTexture)
{
CreateNewTexture();
pTexture = mpTextures.back().get();
}
int nSlot = pTexture->FindFreeSlot();
// Calculate coordinates in texture
int nX = (nSlot % mWidthFactor) * mSubTextureSize;
int nY = (nSlot / mWidthFactor) * mSubTextureSize;
Rectangle aRectangle(Point(nX, nY), Size(nWidth, nHeight));
// If available, copy the image data to the texture
if (pData)
{
if (!pTexture->InsertBuffer(nX, nY, nWidth, nHeight, nFormat, nType, pData))
return OpenGLTexture();
}
return OpenGLTexture(pTexture, aRectangle, nSlot);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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