modernopenglgraphics.cpp

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/*
 * The ManaPlus Client
 * Copyright (C) 2004-2009 The Mana World Development Team
 * Copyright (C) 2009-2010 The Mana Developers
 * Copyright (C) 2011-2019 The ManaPlus Developers
 *
 * This file is part of The ManaPlus Client.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#if defined(USE_OPENGL) && !defined(ANDROID) && !defined(__native_client__)

#include "render/modernopenglgraphics.h"

#include "graphicsmanager.h"

#include "render/opengl/mgl.h"
#ifdef __native_client__
#include "render/opengl/naclglfunctions.h"
#endif // __native_client__

#include "render/shaders/shaderprogram.h"
#include "render/shaders/shadersmanager.h"

#include "render/vertexes/imagecollection.h"

#include "resources/imagerect.h"
#include "resources/openglimagehelper.h"

#include "resources/image/image.h"

#include "utils/delete2.h"
#include "utils/foreach.h"
#include "utils/sdlcheckutils.h"
#include "utils/sdlhelper.h"

#include "debug.h"

#define vertFill2D(var, x1, y1, x2, y2, dstX, dstY, w, h) \
 var[vp + 0] = dstX; \
 var[vp + 1] = dstY; \
 var[vp + 2] = x1; \
 var[vp + 3] = y1; \
 \
 var[vp + 4] = dstX + w; \
 var[vp + 5] = dstY; \
 var[vp + 6] = x2; \
 var[vp + 7] = y1; \
 \
 var[vp + 8] = dstX + w; \
 var[vp + 9] = dstY + h; \
 var[vp + 10] = x2; \
 var[vp + 11] = y2; \
 \
 var[vp + 12] = dstX; \
 var[vp + 13] = dstY; \
 var[vp + 14] = x1; \
 var[vp + 15] = y1; \
 \
 var[vp + 16] = dstX; \
 var[vp + 17] = dstY + h; \
 var[vp + 18] = x1; \
 var[vp + 19] = y2; \
 \
 var[vp + 20] = dstX + w; \
 var[vp + 21] = dstY + h; \
 var[vp + 22] = x2; \
 var[vp + 23] = y2

GLuint ModernOpenGLGraphics::mTextureBinded = 0;
#ifdef DEBUG_DRAW_CALLS
unsigned int ModernOpenGLGraphics::mDrawCalls = 0;
unsigned int ModernOpenGLGraphics::mLastDrawCalls = 0;
#endif // DEBUG_DRAW_CALLS

ModernOpenGLGraphics::ModernOpenGLGraphics() :
 mIntArray(nullptr),
 mIntArrayCached(nullptr),
 mProgram(nullptr),
 mAlphaCached(1.0F),
 mVpCached(0),
 mFloatColor(1.0F),
 mMaxVertices(500),
 mProgramId(0U),
 mSimpleColorUniform(0U),
 mPosAttrib(0),
 mTextureColorUniform(0U),
 mScreenUniform(0U),
 mDrawTypeUniform(0U),
 mVao(0U),
 mVbo(0U),
 mEbo(0U),
 mVboBinded(0U),
 mEboBinded(0U),
 mAttributesBinded(0U),
 mColorAlpha(false),
 mTextureDraw(false),
#ifdef DEBUG_BIND_TEXTURE
 mOldTexture(),
 mOldTextureId(0),
#endif // DEBUG_BIND_TEXTURE
 mFbo()
{
 mOpenGL = RENDER_MODERN_OPENGL;
 mName = "modern OpenGL";
}

ModernOpenGLGraphics::~ModernOpenGLGraphics()
{
 deleteArraysInternal();
 deleteGLObjects();
}

void ModernOpenGLGraphics::deleteGLObjects() restrict2
{
 delete2(mProgram)
 if (mVbo != 0U)
 {
// logger->log("delete buffer vbo: %u", mVbo);
 mglDeleteBuffers(1, &mVbo);
 }
 if (mEbo != 0U)
 {
// logger->log("delete buffer ebo: %u", mEbo);
 mglDeleteBuffers(1, &mEbo);
 }
 if (mVao != 0U)
 mglDeleteVertexArrays(1, &mVao);
}

void ModernOpenGLGraphics::initArrays(const int vertCount) restrict2
{
 mMaxVertices = vertCount;
 if (mMaxVertices < 500)
 mMaxVertices = 500;
 else if (mMaxVertices > 1024)
 mMaxVertices = 1024;

 // need alocate small size, after if limit reached reallocate to double size
 const size_t sz = mMaxVertices * 4 + 30;
 vertexBufSize = mMaxVertices;
 if (mIntArray == nullptr)
 mIntArray = new GLint[sz];
 if (mIntArrayCached == nullptr)
 mIntArrayCached = new GLint[sz];
}

void ModernOpenGLGraphics::postInit() restrict2
{
 mglGenVertexArrays(1, &mVao);
 mglBindVertexArray(mVao);
 mglGenBuffers(1, &mVbo);
// logger->log("gen vbo buffer: %u", mVbo);
 bindArrayBuffer(mVbo);
 mglGenBuffers(1, &mEbo);
// logger->log("gen ebo buffer: %u", mEbo);
 bindElementBuffer(mEbo);

 logger->log("Compiling shaders");
 mProgram = shaders.getSimpleProgram();
 if (mProgram == nullptr)
 {
 graphicsManager.logError();
 logger->safeError("Shader creation error. See manaplus.log.");
 }
 mProgramId = mProgram->getProgramId();
 if (mProgramId == 0U)
 logger->error("Shaders compilation error.");

 logger->log("Shaders compilation done.");
 mglUseProgram(mProgramId);

 mPosAttrib = mglGetAttribLocation(mProgramId, "position");
 mglEnableVertexAttribArray(mPosAttrib);
 mglVertexAttribIFormat(mPosAttrib, 4, GL_INT, 0);

 mSimpleColorUniform = mglGetUniformLocation(mProgramId, "color");
 mScreenUniform = mglGetUniformLocation(mProgramId, "screen");
 mDrawTypeUniform = mglGetUniformLocation(mProgramId, "drawType");
 mTextureColorUniform = mglGetUniformLocation(mProgramId, "alpha");

 mglUniform1f(mTextureColorUniform, 1.0F);

 mglBindVertexBuffer(0, mVbo, 0, 4 * sizeof(GLint));
 mglVertexAttribBinding(mPosAttrib, 0);
// mglVertexAttribIPointer(mPosAttrib, 4, GL_INT, 4 * sizeof(GLint), 0);
 mAttributesBinded = mVbo;

 mglUniform2f(mScreenUniform,
 static_cast<float>(mWidth) / 2.0F,
 static_cast<float>(mHeight) / 2.0F);
 mglUniform4f(mSimpleColorUniform,
 0.0F,
 0.0F,
 0.0F,
 0.0F);
}

void ModernOpenGLGraphics::screenResized() restrict2
{
 deleteGLObjects();
 mVboBinded = 0U;
 mEboBinded = 0U;
 mAttributesBinded = 0U;
 mColor = Color(0, 0, 0, 0);
 postInit();
}

void ModernOpenGLGraphics::deleteArrays() restrict2
{
 deleteArraysInternal();
}

void ModernOpenGLGraphics::deleteArraysInternal() restrict2
{
 delete [] mIntArray;
 mIntArray = nullptr;
 delete [] mIntArrayCached;
 mIntArrayCached = nullptr;
}

bool ModernOpenGLGraphics::setVideoMode(const int w, const int h,
 const int scale,
 const int bpp,
 const bool fs,
 const bool hwaccel,
 const bool resize,
 const bool noFrame,
 const bool allowHighDPI) restrict2
{
 setMainFlags(w, h,
 scale,
 bpp,
 fs,
 hwaccel,
 resize,
 noFrame,
 allowHighDPI);

 return setOpenGLMode();
}

void ModernOpenGLGraphics::setColor(const Color &restrict color) restrict2
{
 mColorAlpha = (color.a != 255);
 if (mColor != color)
 {
 mColor = color;
 mglUniform4f(mSimpleColorUniform,
 static_cast<float>(color.r) / 255.0F,
 static_cast<float>(color.g) / 255.0F,
 static_cast<float>(color.b) / 255.0F,
 static_cast<float>(color.a) / 255.0F);
 }
}

void ModernOpenGLGraphics::setColorAlpha(const float alpha) restrict2
{
 if (mAlphaCached != alpha)
 {
 mAlphaCached = alpha;
 mglUniform1f(mTextureColorUniform, alpha);
 }
}

void ModernOpenGLGraphics::drawQuad(const int srcX,
 const int srcY,
 const int dstX,
 const int dstY,
 const int width,
 const int height) restrict2
{
 const int texX2 = srcX + width;
 const int texY2 = srcY + height;
 const int x2 = dstX + width;
 const int y2 = dstY + height;

 GLint vertices[] =
 {
 dstX, dstY, srcX, srcY,
 x2, dstY, texX2, srcY,
 dstX, y2, srcX, texY2,
 x2, y2, texX2, texY2
 };

// logger->log("allocate: %d, %ld", mVboBinded, sizeof(vertices));
 mglBufferData(GL_ARRAY_BUFFER, sizeof(vertices),
 vertices, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

void ModernOpenGLGraphics::drawRescaledQuad(const int srcX, const int srcY,
 const int dstX, const int dstY,
 const int width, const int height,
 const int desiredWidth,
 const int desiredHeight) restrict2
{
 const int texX2 = srcX + width;
 const int texY2 = srcY + height;
 const int x2 = dstX + desiredWidth;
 const int y2 = dstY + desiredHeight;

 GLint vertices[] =
 {
 dstX, dstY, srcX, srcY,
 x2, dstY, texX2, srcY,
 dstX, y2, srcX, texY2,
 x2, y2, texX2, texY2
 };

// logger->log("allocate: %d, %ld", mVboBinded, sizeof(vertices));
 mglBufferData(GL_ARRAY_BUFFER, sizeof(vertices),
 vertices, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

void ModernOpenGLGraphics::drawImage(const Image *restrict const image,
 int dstX, int dstY) restrict2
{
 drawImageInline(image, dstX, dstY);
}

void ModernOpenGLGraphics::drawImageInline(const Image *restrict const image,
 int dstX, int dstY) restrict2
{
 FUNC_BLOCK("Graphics::drawImage", 1)
 if (image == nullptr)
 return;

#ifdef DEBUG_BIND_TEXTURE
 debugBindTexture(image);
#endif // DEBUG_BIND_TEXTURE
 bindTexture(GL_TEXTURE_2D, image->mGLImage);
 enableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);
 setColorAlpha(image->mAlpha);

 const ClipRect &clipArea = mClipStack.top();
 const SDL_Rect &imageRect = image->mBounds;
 drawQuad(imageRect.x, imageRect.y,
 dstX + clipArea.xOffset, dstY + clipArea.yOffset,
 imageRect.w, imageRect.h);
}

void ModernOpenGLGraphics::copyImage(const Image *restrict const image,
 int dstX, int dstY) restrict2
{
 drawImageInline(image, dstX, dstY);
}

void ModernOpenGLGraphics::testDraw() restrict2
{
/*
 GLint vertices[] =
 {
 0, 0, 0, 0,
 800, 0, 800, 0,
 0, 600, 0, 600,
 800, 600, 800, 600
 };
*/
// logger->log("allocate: %d, %ld", mVboBinded, sizeof(vertices));
// logger->log("allocate ebo: %d, %ld", mEboBinded, sizeof(elements));
// mglBufferData(GL_ARRAY_BUFFER, sizeof(vertices),
// vertices, GL_STREAM_DRAW);
// mglBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(elements),
// elements, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
// glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_INT, 0);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

void ModernOpenGLGraphics::drawImageCached(const Image *restrict const image
 A_UNUSED,
 int A_UNUSED x,
 int y A_UNUSED) restrict2
{
}

void ModernOpenGLGraphics::drawPatternCached(const Image *restrict const image
 A_UNUSED,
 const int x A_UNUSED,
 const int y A_UNUSED,
 const int w A_UNUSED,
 const int h A_UNUSED) restrict2
{
}

void ModernOpenGLGraphics::completeCache() restrict2
{
}

void ModernOpenGLGraphics::drawRescaledImage(const Image *restrict const image,
 int dstX, int dstY,
 const int desiredWidth,
 const int desiredHeight) restrict2
{
 if (image == nullptr)
 return;

 const SDL_Rect &imageRect = image->mBounds;

 // Just draw the image normally when no resizing is necessary,
 if (imageRect.w == desiredWidth && imageRect.h == desiredHeight)
 {
 drawImageInline(image, dstX, dstY);
 return;
 }

 setColorAlpha(image->mAlpha);
#ifdef DEBUG_BIND_TEXTURE
 debugBindTexture(image);
#endif // DEBUG_BIND_TEXTURE
 bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
 enableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);

 const ClipRect &clipArea = mClipStack.top();
 // Draw a textured quad.
 drawRescaledQuad(imageRect.x, imageRect.y,
 dstX + clipArea.xOffset, dstY + clipArea.yOffset,
 imageRect.w, imageRect.h,
 desiredWidth, desiredHeight);
}

void ModernOpenGLGraphics::drawPattern(const Image *restrict const image,
 const int x, const int y,
 const int w, const int h) restrict2
{
 drawPatternInline(image, x, y, w, h);
}

void ModernOpenGLGraphics::drawPatternInline(const Image *restrict const image,
 const int x,
 const int y,
 const int w,
 const int h) restrict2
{
 if (image == nullptr)
 return;

 const SDL_Rect &imageRect = image->mBounds;
 const int srcX = imageRect.x;
 const int srcY = imageRect.y;
 const int iw = imageRect.w;
 const int ih = imageRect.h;

 if (iw == 0 || ih == 0)
 return;

 const ClipRect &clipArea = mClipStack.top();
 const int x2 = x + clipArea.xOffset;
 const int y2 = y + clipArea.yOffset;

#ifdef DEBUG_BIND_TEXTURE
 debugBindTexture(image);
#endif // DEBUG_BIND_TEXTURE

 bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);

 enableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);
 setColorAlpha(image->mAlpha);

 unsigned int vp = 0;
 const unsigned int vLimit = mMaxVertices * 4;

 for (int py = 0; py < h; py += ih)
 {
 const int height = (py + ih >= h) ? h - py : ih;
 const int texY2 = srcY + height;
 const int dstY = y2 + py;
 for (int px = 0; px < w; px += iw)
 {
 const int width = (px + iw >= w) ? w - px : iw;
 const int dstX = x2 + px;

 const int texX2 = srcX + width;

 vertFill2D(mIntArray,
 srcX, srcY, texX2, texY2,
 dstX, dstY, width, height);

 vp += 24;
 if (vp >= vLimit)
 {
 drawTriangleArray(vp);
 vp = 0;
 }
 }
 }
 if (vp > 0)
 drawTriangleArray(vp);
}

void ModernOpenGLGraphics::drawRescaledPattern(const Image *
 restrict const image,
 const int x, const int y,
 const int w, const int h,
 const int scaledWidth,
 const int scaledHeight)
 restrict2
{
 if (image == nullptr)
 return;

 if (scaledWidth == 0 || scaledHeight == 0)
 return;

 const SDL_Rect &imageRect = image->mBounds;
 const int srcX = imageRect.x;
 const int srcY = imageRect.y;
 const int iw = imageRect.w;
 const int ih = imageRect.h;
 if (iw == 0 || ih == 0)
 return;

#ifdef DEBUG_BIND_TEXTURE
 debugBindTexture(image);
#endif // DEBUG_BIND_TEXTURE

 bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);

 enableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);
 setColorAlpha(image->mAlpha);

 unsigned int vp = 0;
 const unsigned int vLimit = mMaxVertices * 4;

 const ClipRect &clipArea = mClipStack.top();
 const int x2 = x + clipArea.xOffset;
 const int y2 = y + clipArea.yOffset;

 const float scaleFactorW = static_cast<float>(scaledWidth) / iw;
 const float scaleFactorH = static_cast<float>(scaledHeight) / ih;

 for (int py = 0; py < h; py += scaledHeight)
 {
 const int height = (py + scaledHeight >= h)
 ? h - py : scaledHeight;
 const int dstY = y2 + py;
 const int scaledY = srcY + height / scaleFactorH;
 for (int px = 0; px < w; px += scaledWidth)
 {
 const int width = (px + scaledWidth >= w)
 ? w - px : scaledWidth;
 const int dstX = x2 + px;
 const int scaledX = srcX + width / scaleFactorW;

 vertFill2D(mIntArray,
 srcX, srcY, scaledX, scaledY,
 dstX, dstY, width, height);

 vp += 24;
 if (vp >= vLimit)
 {
 drawTriangleArray(vp);
 vp = 0;
 }
 }
 }
 if (vp > 0)
 drawTriangleArray(vp);
}

inline void ModernOpenGLGraphics::drawVertexes(const
 OpenGLGraphicsVertexes &
 restrict ogl) restrict2
{
 const STD_VECTOR<int> &vp = ogl.mVp;
 const STD_VECTOR<GLuint> &vbos = ogl.mVbo;
 STD_VECTOR<int>::const_iterator ivp;
 STD_VECTOR<GLuint>::const_iterator ivbo;
 const STD_VECTOR<int>::const_iterator ivp_end = vp.end();

/*
 if (vp.size() != vbos.size())
 logger->log("different size in vp and vbos");
*/

 for (ivp = vp.begin(), ivbo = vbos.begin();
 ivp != ivp_end;
 ++ ivp, ++ ivbo)
 {
 bindArrayBufferAndAttributes(*ivbo);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
// logger->log("draw from array: %u", *ivbo);
 mglDrawArrays(GL_TRIANGLES, 0, *ivp / 4);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
 }
}

void ModernOpenGLGraphics::calcPattern(ImageVertexes *restrict const vert,
 const Image *restrict const image,
 const int x,
 const int y,
 const int w,
 const int h) const restrict2
{
 calcPatternInline(vert, image, x, y, w, h);
}

void ModernOpenGLGraphics::calcPatternInline(ImageVertexes *
 restrict const vert,
 const Image *restrict const image,
 const int x,
 const int y,
 const int w,
 const int h) const restrict2
{
 if (image == nullptr || vert == nullptr)
 return;

 const SDL_Rect &imageRect = image->mBounds;
 const int srcX = imageRect.x;
 const int srcY = imageRect.y;
 const int iw = imageRect.w;
 const int ih = imageRect.h;

 if (iw == 0 || ih == 0)
 return;

 const ClipRect &clipArea = mClipStack.top();
 const int x2 = x + clipArea.xOffset;
 const int y2 = y + clipArea.yOffset;

 const unsigned int vLimit = mMaxVertices * 4;

 OpenGLGraphicsVertexes &ogl = vert->ogl;
 unsigned int vp = ogl.continueVp();

 GLint *intArray = ogl.continueIntTexArray();

 for (int py = 0; py < h; py += ih)
 {
 const int height = (py + ih >= h) ? h - py : ih;
 const int dstY = y2 + py;
 const int texY2 = srcY + height;
 for (int px = 0; px < w; px += iw)
 {
 const int width = (px + iw >= w) ? w - px : iw;
 const int dstX = x2 + px;
 const int texX2 = srcX + width;

 vertFill2D(intArray,
 srcX, srcY, texX2, texY2,
 dstX, dstY, width, height);

 vp += 24;
 if (vp >= vLimit)
 {
 intArray = ogl.switchIntTexArray();
 ogl.switchVp(vp);
 vp = 0;
 }
 }
 }
 ogl.switchVp(vp);
}

void ModernOpenGLGraphics::calcTileCollection(ImageCollection *
 restrict const vertCol,
 const Image *
 restrict const image,
 int x, int y) restrict2
{
 if (vertCol == nullptr || image == nullptr)
 return;
 if (vertCol->currentGLImage != image->mGLImage)
 {
 ImageVertexes *const vert = new ImageVertexes;
 vertCol->currentGLImage = image->mGLImage;
 vertCol->currentVert = vert;
 vert->image = image;
 vertCol->draws.push_back(vert);
 calcTileVertexesInline(vert, image, x, y);
 }
 else
 {
 calcTileVertexesInline(vertCol->currentVert, image, x, y);
 }
}

void ModernOpenGLGraphics::drawTileCollection(const ImageCollection
 *restrict const vertCol)
 restrict2
{
 enableTexturingAndBlending();
/*
 if (!vertCol)
 {
 logger->log("ModernOpenGLGraphics::drawTileCollection"
 " vertCol is nullptr");
 }
*/
 const ImageVertexesVector &draws = vertCol->draws;
 const ImageCollectionCIter it_end = draws.end();
 for (ImageCollectionCIter it = draws.begin(); it != it_end; ++ it)
 {
 const ImageVertexes *const vert = *it;
 const Image *const image = vert->image;

 setColorAlpha(image->mAlpha);
#ifdef DEBUG_BIND_TEXTURE
 debugBindTexture(image);
#endif // DEBUG_BIND_TEXTURE

 bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
 drawVertexes(vert->ogl);
 }
}

void ModernOpenGLGraphics::calcPattern(ImageCollection *restrict const vertCol,
 const Image *restrict const image,
 const int x,
 const int y,
 const int w,
 const int h) const restrict2
{
 if (vertCol == nullptr || image == nullptr)
 return;
 ImageVertexes *vert = nullptr;
 if (vertCol->currentGLImage != image->mGLImage)
 {
 vert = new ImageVertexes;
 vertCol->currentGLImage = image->mGLImage;
 vertCol->currentVert = vert;
 vert->image = image;
 vertCol->draws.push_back(vert);
 }
 else
 {
 vert = vertCol->currentVert;
 }

 calcPatternInline(vert, image, x, y, w, h);
}

void ModernOpenGLGraphics::calcTileVertexes(ImageVertexes *restrict const vert,
 const Image *restrict const image,
 int dstX, int dstY) const restrict2
{
 calcTileVertexesInline(vert, image, dstX, dstY);
}

void ModernOpenGLGraphics::calcTileVertexesInline(ImageVertexes *
 restrict const vert,
 const Image *
 restrict const image,
 int dstX,
 int dstY) const restrict2
{
 const SDL_Rect &imageRect = image->mBounds;
 const int srcX = imageRect.x;
 const int srcY = imageRect.y;
 const int w = imageRect.w;
 const int h = imageRect.h;

 if (w == 0 || h == 0)
 return;

 const ClipRect &clipArea = mClipStack.top();
 const int x2 = dstX + clipArea.xOffset;
 const int y2 = dstY + clipArea.yOffset;

 const unsigned int vLimit = mMaxVertices * 4;

 OpenGLGraphicsVertexes &ogl = vert->ogl;

 unsigned int vp = ogl.continueVp();

 int texX2 = srcX + w;
 int texY2 = srcY + h;

 GLint *const intArray = ogl.continueIntTexArray();

 vertFill2D(intArray,
 srcX, srcY, texX2, texY2,
 x2, y2, w, h);

 vp += 24;
 if (vp >= vLimit)
 {
 ogl.switchIntTexArray();
 ogl.switchVp(vp);
 vp = 0;
 }

 ogl.switchVp(vp);
}

void ModernOpenGLGraphics::drawTileVertexes(const ImageVertexes *
 restrict const vert) restrict2
{
 if (vert == nullptr)
 return;
 const Image *const image = vert->image;

 setColorAlpha(image->mAlpha);
#ifdef DEBUG_BIND_TEXTURE
 debugBindTexture(image);
#endif // DEBUG_BIND_TEXTURE

 bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
 enableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);

 drawVertexes(vert->ogl);
}

void ModernOpenGLGraphics::calcWindow(ImageCollection *restrict const vertCol,
 const int x, const int y,
 const int w, const int h,
 const ImageRect &restrict imgRect)
 restrict2
{
 ImageVertexes *vert = nullptr;
 const Image *const image = imgRect.grid[4];
 if (image == nullptr)
 return;
 if (vertCol->currentGLImage != image->mGLImage)
 {
 vert = new ImageVertexes;
 vertCol->currentGLImage = image->mGLImage;
 vertCol->currentVert = vert;
 vert->image = image;
 vertCol->draws.push_back(vert);
 }
 else
 {
 vert = vertCol->currentVert;
 }
 calcImageRect(vert, x, y, w, h, imgRect);
}

void ModernOpenGLGraphics::updateScreen() restrict2
{
 BLOCK_START("Graphics::updateScreen")
#ifdef DEBUG_DRAW_CALLS
 mLastDrawCalls = mDrawCalls;
 mDrawCalls = 0;
#endif // DEBUG_DRAW_CALLS
#ifdef USE_SDL2
 SDL_GL_SwapWindow(mWindow);
#else // USE_SDL2
 SDL_GL_SwapBuffers();
#endif // USE_SDL2
#ifdef DEBUG_OPENGL
 if (isGLNotNull(mglFrameTerminator))
 mglFrameTerminator();
#endif // DEBUG_OPENGL
 BLOCK_END("Graphics::updateScreen")
}

void ModernOpenGLGraphics::beginDraw() restrict2
{
 setOpenGLFlags();
 mglDisable(GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
 mglHint(GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB, GL_FASTEST);
 pushClipArea(Rect(0, 0, mRect.w, mRect.h));
}

void ModernOpenGLGraphics::endDraw() restrict2
{
 popClipArea();
}

void ModernOpenGLGraphics::pushClipArea(const Rect &restrict area) restrict2
{
 Graphics::pushClipArea(area);
 const ClipRect &clipArea = mClipStack.top();

 mglScissor(clipArea.x * mScale,
 (mRect.h - clipArea.y - clipArea.height) * mScale,
 clipArea.width * mScale,
 clipArea.height * mScale);
}

void ModernOpenGLGraphics::popClipArea() restrict2
{
 if (mClipStack.empty())
 return;
 Graphics::popClipArea();
 if (mClipStack.empty())
 return;

 const ClipRect &clipArea = mClipStack.top();
 mglScissor(clipArea.x * mScale,
 (mRect.h - clipArea.y - clipArea.height) * mScale,
 clipArea.width * mScale,
 clipArea.height * mScale);
}

void ModernOpenGLGraphics::drawPoint(int x, int y) restrict2
{
 disableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);
 const ClipRect &clipArea = mClipStack.top();
 GLint vertices[] =
 {
 x + clipArea.xOffset, y + clipArea.yOffset, 0, 0
 };
// logger->log("allocate: %d, %ld", mVboBinded, sizeof(vertices));
 mglBufferData(GL_ARRAY_BUFFER, sizeof(vertices),
 vertices, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_POINTS, 0, 1);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

void ModernOpenGLGraphics::drawLine(int x1, int y1,
 int x2, int y2) restrict2
{
 disableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);
 const ClipRect &clipArea = mClipStack.top();
 GLint vertices[] =
 {
 x1 + clipArea.xOffset, y1 + clipArea.yOffset, 0, 0,
 x2 + clipArea.xOffset, y2 + clipArea.yOffset, 0, 0
 };
// logger->log("allocate: %d, %ld", mVboBinded, sizeof(vertices));
 mglBufferData(GL_ARRAY_BUFFER, sizeof(vertices),
 vertices, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_LINES, 0, 2);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

void ModernOpenGLGraphics::drawRectangle(const Rect &restrict rect) restrict2
{
 disableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);
 const ClipRect &clipArea = mClipStack.top();
 const int x1 = rect.x + clipArea.xOffset;
 const int y1 = rect.y + clipArea.yOffset;
 const int x2 = x1 + rect.width;
 const int y2 = y1 + rect.height;
 GLint vertices[] =
 {
 x1, y1, 0, 0,
 x1, y2, 0, 0,
 x2, y2, 0, 0,
 x2, y1, 0, 0
 };

// logger->log("allocate: %d, %ld", mVboBinded, sizeof(vertices));
 mglBufferData(GL_ARRAY_BUFFER, sizeof(vertices),
 vertices, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_LINE_LOOP, 0, 4);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

void ModernOpenGLGraphics::fillRectangle(const Rect &restrict rect) restrict2
{
 disableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);
 const ClipRect &clipArea = mClipStack.top();
 const int x1 = rect.x + clipArea.xOffset;
 const int y1 = rect.y + clipArea.yOffset;
 const int x2 = x1 + rect.width;
 const int y2 = y1 + rect.height;
 GLint vertices[] =
 {
 x1, y1, 0, 0,
 x2, y1, 0, 0,
 x1, y2, 0, 0,
 x2, y2, 0, 0
 };

// logger->log("allocate: %d, %ld", mVboBinded, sizeof(vertices));
 mglBufferData(GL_ARRAY_BUFFER, sizeof(vertices),
 vertices, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

void ModernOpenGLGraphics::enableTexturingAndBlending() restrict2
{
 if (!mTextureDraw)
 {
 mTextureDraw = true;
 mglUniform1f(mDrawTypeUniform, 1.0F);
 }
 if (!mAlpha)
 {
 mglEnable(GL_BLEND);
 mAlpha = true;
 }
}

void ModernOpenGLGraphics::disableTexturingAndBlending() restrict2
{
 if (mTextureDraw)
 {
 mTextureDraw = false;
 mglUniform1f(mDrawTypeUniform, 0.0F);
 }
 if (mAlpha && !mColorAlpha)
 {
 mglDisable(GL_BLEND);
 mAlpha = false;
 }
 else if (!mAlpha && mColorAlpha)
 {
 mglEnable(GL_BLEND);
 mAlpha = true;
 }
}

void ModernOpenGLGraphics::drawRectangle(const Rect &restrict rect A_UNUSED,
 const bool filled A_UNUSED) restrict2
{
}

void ModernOpenGLGraphics::drawNet(const int x1, const int y1,
 const int x2, const int y2,
 const int width, const int height) restrict2
{
 unsigned int vp = 0;
 const unsigned int vLimit = mMaxVertices * 4;

 disableTexturingAndBlending();
 bindArrayBufferAndAttributes(mVbo);
 const ClipRect &clipArea = mClipStack.top();
 const GLint dx = clipArea.xOffset;
 const GLint dy = clipArea.yOffset;

 const GLint xs1 = x1 + dx;
 const GLint xs2 = x2 + dx;
 const GLint ys1 = y1 + dy;
 const GLint ys2 = y2 + dy;

 for (int y = y1; y < y2; y += height)
 {
 mIntArray[vp + 0] = xs1;
 mIntArray[vp + 1] = y;
 mIntArray[vp + 2] = 0;
 mIntArray[vp + 3] = 0;

 mIntArray[vp + 4] = xs2;
 mIntArray[vp + 5] = y;
 mIntArray[vp + 6] = 0;
 mIntArray[vp + 7] = 0;

 vp += 8;
 if (vp >= vLimit)
 {
 drawLineArrays(vp);
 vp = 0;
 }
 }

 for (int x = x1; x < x2; x += width)
 {
 mIntArray[vp + 0] = x;
 mIntArray[vp + 1] = ys1;
 mIntArray[vp + 2] = 0.0F;
 mIntArray[vp + 3] = 0.0F;

 mIntArray[vp + 4] = x;
 mIntArray[vp + 5] = ys2;
 mIntArray[vp + 6] = 0.0F;
 mIntArray[vp + 7] = 0.0F;

 vp += 8;
 if (vp >= vLimit)
 {
 drawLineArrays(vp);
 vp = 0;
 }
 }

 if (vp > 0)
 drawLineArrays(vp);
}

void ModernOpenGLGraphics::bindTexture(const GLenum target,
 const GLuint texture)
{
 if (mTextureBinded != texture)
 {
 mTextureBinded = texture;
 mglBindTexture(target, texture);
 }
}

void ModernOpenGLGraphics::removeArray(const uint32_t sz,
 uint32_t *restrict const arr) restrict2
{
 mglDeleteBuffers(sz, arr);
 for (size_t f = 0; f < sz; f ++)
 {
 if (arr[f] == mVboBinded)
 mVboBinded = 0;
// logger->log("delete buffers: %u", arr[f]);
 }
}

void ModernOpenGLGraphics::bindArrayBuffer(const GLuint vbo) restrict2
{
 if (mVboBinded != vbo)
 {
 mVboBinded = vbo;
// logger->log("bind array: %u", vbo);
 mglBindBuffer(GL_ARRAY_BUFFER, vbo);
/*
 if (mglIsBuffer(vbo) != GL_TRUE)
 logger->log("bind wrong buffer: %u", vbo);
*/
 mAttributesBinded = 0U;
 }
}

void ModernOpenGLGraphics::bindElementBuffer(const GLuint ebo) restrict2
{
 if (mEboBinded != ebo)
 {
 mEboBinded = ebo;
 logger->log("bind element: %u", ebo);
 mglBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo);
/*
 if (mglIsBuffer(ebo) != GL_TRUE)
 logger->log("bind wrong buffer: %u", vbo);
*/
 }
}

void ModernOpenGLGraphics::bindArrayBufferAndAttributes(const GLuint vbo)
 restrict2
{
 if (mVboBinded != vbo)
 {
 mVboBinded = vbo;
// logger->log("bind array: %u", vbo);
 mglBindBuffer(GL_ARRAY_BUFFER, vbo);
/*
 if (mglIsBuffer(vbo) != GL_TRUE)
 logger->log("bind wrong buffer: %u", vbo);
*/

 mAttributesBinded = mVboBinded;
// logger->log("bind vertex buffer: %u", mVboBinded);
 mglBindVertexBuffer(0, mVboBinded, 0, 4 * sizeof(GLint));
// mglVertexAttribIPointer(mPosAttrib, 4, GL_INT, 4 * sizeof(GLint), 0);
// mglVertexAttribBinding(mPosAttrib, 0);
 }
 else if (mAttributesBinded != mVboBinded)
 {
 mAttributesBinded = mVboBinded;
// logger->log("bind vertex buffer: %u", mVboBinded);
 mglBindVertexBuffer(0, mVboBinded, 0, 4 * sizeof(GLint));
// mglVertexAttribIPointer(mPosAttrib, 4, GL_INT, 4 * sizeof(GLint), 0);
// mglVertexAttribBinding(mPosAttrib, 0);
 }
}

void ModernOpenGLGraphics::bindAttributes() restrict2
{
 if (mAttributesBinded != mVboBinded)
 {
 mAttributesBinded = mVboBinded;
 mglBindVertexBuffer(0, mVboBinded, 0, 4 * sizeof(GLint));
// mglVertexAttribIPointer(mPosAttrib, 4, GL_INT, 4 * sizeof(GLint), 0);
// mglVertexAttribBinding(mPosAttrib, 0);
 }
}

void ModernOpenGLGraphics::dumpSettings()
{
 GLint test[1000];
 logger->log("\n\n");
 logger->log("start opengl dump");
 for (int f = 0; f < 65535; f ++)
 {
 test[0] = 0;
 test[1] = 0;
 test[2] = 0;
 test[3] = 0;
 mglGetIntegerv(f, &test[0]);
 if (test[0] != 0 || test[1] != 0 || test[2] != 0 || test[3] != 0)
 {
 logger->log("\n%d = %d, %d, %d, %d", f,
 test[0], test[1], test[2], test[3]);
 }
 }
}

void ModernOpenGLGraphics::drawImageRect(const int x, const int y,
 const int w, const int h,
 const ImageRect &restrict imgRect)
 restrict2
{
 #include "render/graphics_drawImageRect.hpp"
}

void ModernOpenGLGraphics::calcImageRect(ImageVertexes *restrict const vert,
 const int x, const int y,
 const int w, const int h,
 const ImageRect &restrict imgRect)
 restrict2
{
 #include "render/graphics_calcImageRect.hpp"
}

void ModernOpenGLGraphics::clearScreen() const restrict2
{
 mglClear(GL_COLOR_BUFFER_BIT |
 GL_DEPTH_BUFFER_BIT |
 GL_STENCIL_BUFFER_BIT);
}

void ModernOpenGLGraphics::createGLContext(const bool custom) restrict2
{
 if (custom)
 {
 if (mGLContext != nullptr)
 SDL::makeCurrentContext(mGLContext);
 else
 mGLContext = SDL::createGLContext(mWindow, 3, 3, 0x01);
 }
 else
 {
 Graphics::createGLContext(false);
 }
}

void ModernOpenGLGraphics::finalize(ImageCollection *restrict const col)
 restrict2
{
 if (col == nullptr)
 return;
 FOR_EACH (ImageCollectionIter, it, col->draws)
 finalize(*it);
}

void ModernOpenGLGraphics::finalize(ImageVertexes *restrict const vert)
 restrict2
{
 // in future need convert in each switchVp/continueVp

 if (vert == nullptr)
 return;
 OpenGLGraphicsVertexes &ogl = vert->ogl;
 const STD_VECTOR<int> &vp = ogl.mVp;
 STD_VECTOR<int>::const_iterator ivp;
 const STD_VECTOR<int>::const_iterator ivp_end = vp.end();
 STD_VECTOR<GLint*> &intTexPool = ogl.mIntTexPool;
 STD_VECTOR<GLint*>::const_iterator ft;
 const STD_VECTOR<GLint*>::const_iterator ft_end = intTexPool.end();
 STD_VECTOR<GLuint> &vbos = ogl.mVbo;
 STD_VECTOR<GLuint>::const_iterator ivbo;

 const int sz = CAST_S32(intTexPool.size());
 if (sz == 0)
 return;
 vbos.resize(sz);
 mglGenBuffers(sz, &vbos[0]);
/*
 for (int f = 0; f < sz; f ++)
 logger->log("gen buffers: %u", vbos[f]);
*/

 for (ft = intTexPool.begin(), ivp = vp.begin(), ivbo = vbos.begin();
 ft != ft_end && ivp != ivp_end;
 ++ ft, ++ ivp, ++ ivbo)
 {
 bindArrayBuffer(*ivbo);
/*
 logger->log("allocate: %d, %ld", mVboBinded,
 (*ivp) * sizeof(GLint));
*/
 mglBufferData(GL_ARRAY_BUFFER, (*ivp) * sizeof(GLint),
 *ft, GL_STATIC_DRAW);
 }

 for (STD_VECTOR<GLint*>::iterator it = intTexPool.begin();
 it != intTexPool.end(); ++ it)
 {
 delete [] (*it);
 }
 intTexPool.clear();
}

void ModernOpenGLGraphics::drawTriangleArray(const int size) restrict2
{
// logger->log("allocate: %d, %ld", mVboBinded, size * sizeof(GLint));
 mglBufferData(GL_ARRAY_BUFFER, size * sizeof(GLint),
 mIntArray, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_TRIANGLES, 0, size / 4);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

void ModernOpenGLGraphics::drawTriangleArray(const GLint *restrict const array,
 const int size) restrict2
{
// logger->log("allocate: %d, %ld", mVboBinded, size * sizeof(GLint));
 mglBufferData(GL_ARRAY_BUFFER, size * sizeof(GLint),
 array, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_TRIANGLES, 0, size / 4);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

void ModernOpenGLGraphics::drawLineArrays(const int size)
{
// logger->log("allocate: %d, %ld", mVboBinded, size * sizeof(GLint));
 mglBufferData(GL_ARRAY_BUFFER, size * sizeof(GLint),
 mIntArray, GL_STREAM_DRAW);
#ifdef DEBUG_DRAW_CALLS
 mDrawCalls ++;
#endif // DEBUG_DRAW_CALLS
 mglDrawArrays(GL_LINES, 0, size / 4);
#ifdef OPENGLERRORS
 graphicsManager.logError();
#endif // OPENGLERRORS
}

#ifdef DEBUG_BIND_TEXTURE
void ModernOpenGLGraphics::debugBindTexture(const Image *restrict const image)
 restrict2
{
 const std::string texture = image->mIdPath;
 if (mOldTexture != texture)
 {
 if ((!mOldTexture.empty() || !texture.empty())
 && mOldTextureId != image->mGLImage)
 {
 logger->log("bind: %s (%d) to %s (%d)", mOldTexture.c_str(),
 mOldTextureId, texture.c_str(), image->mGLImage);
 }
 mOldTextureId = image->mGLImage;
 mOldTexture = texture;
 }
}
#else // DEBUG_BIND_TEXTURE
void ModernOpenGLGraphics::debugBindTexture(const Image *restrict const
 image A_UNUSED) restrict2
{
}
#endif // DEBUG_BIND_TEXTURE

#endif // defined(USE_OPENGL) && !defined(ANDROID) &&
 // !defined(__native_client__)