/*
* The ManaPlus Client
* Copyright (C) 2004-2009 The Mana World Development Team
* Copyright (C) 2009-2010 The Mana Developers
* Copyright (C) 2011-2013 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 .
*/
#include "main.h"
#if defined USE_OPENGL && !defined ANDROID
#include "render/safeopenglgraphics.h"
#include "configuration.h"
#include "graphicsmanager.h"
#include "resources/image.h"
#include "resources/openglimagehelper.h"
#include "utils/sdlcheckutils.h"
#include "debug.h"
GLuint SafeOpenGLGraphics::mLastImage = 0;
SafeOpenGLGraphics::SafeOpenGLGraphics():
mTexture(false),
mIsByteColor(false),
mByteColor(),
mFloatColor(1.0F),
mColorAlpha(false),
mFbo()
{
mOpenGL = RENDER_SAFE_OPENGL;
mName = "safe OpenGL";
}
SafeOpenGLGraphics::~SafeOpenGLGraphics()
{
}
bool SafeOpenGLGraphics::setVideoMode(const int w, const int h, const int bpp,
const bool fs, const bool hwaccel,
const bool resize, const bool noFrame)
{
setMainFlags(w, h, bpp, fs, hwaccel, resize, noFrame);
return setOpenGLMode();
}
static inline void drawQuad(const Image *image,
const int srcX, const int srcY,
const int dstX, const int dstY,
const int width, const int height)
{
if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
{
const float tw = static_cast(image->mTexWidth);
const float th = static_cast(image->mTexHeight);
// Find OpenGL normalized texture coordinates.
const float texX1 = static_cast(srcX) / tw;
const float texY1 = static_cast(srcY) / th;
const float texX2 = static_cast(srcX + width) / tw;
const float texY2 = static_cast(srcY + height) / th;
glTexCoord2f(texX1, texY1);
glVertex2i(dstX, dstY);
glTexCoord2f(texX2, texY1);
glVertex2i(dstX + width, dstY);
glTexCoord2f(texX2, texY2);
glVertex2i(dstX + width, dstY + height);
glTexCoord2f(texX1, texY2);
glVertex2i(dstX, dstY + height);
}
else
{
glTexCoord2i(srcX, srcY);
glVertex2i(dstX, dstY);
glTexCoord2i(srcX + width, srcY);
glVertex2i(dstX + width, dstY);
glTexCoord2i(srcX + width, srcY + height);
glVertex2i(dstX + width, dstY + height);
glTexCoord2i(srcX, srcY + height);
glVertex2i(dstX, dstY + height);
}
}
static inline void drawRescaledQuad(const Image *const image,
const int srcX, const int srcY,
const int dstX, const int dstY,
const int width, const int height,
const int desiredWidth,
const int desiredHeight)
{
if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D)
{
const float tw = static_cast(image->mTexWidth);
const float th = static_cast(image->mTexHeight);
// Find OpenGL normalized texture coordinates.
const float texX1 = static_cast(srcX) / tw;
const float texY1 = static_cast(srcY) / th;
const float texX2 = static_cast(srcX + width) / tw;
const float texY2 = static_cast(srcY + height) / th;
glTexCoord2f(texX1, texY1);
glVertex2i(dstX, dstY);
glTexCoord2f(texX2, texY1);
glVertex2i(dstX + desiredWidth, dstY);
glTexCoord2f(texX2, texY2);
glVertex2i(dstX + desiredWidth, dstY + desiredHeight);
glTexCoord2f(texX1, texY2);
glVertex2i(dstX, dstY + desiredHeight);
}
else
{
glTexCoord2i(srcX, srcY);
glVertex2i(dstX, dstY);
glTexCoord2i(srcX + width, srcY);
glVertex2i(dstX + desiredWidth, dstY);
glTexCoord2i(srcX + width, srcY + height);
glVertex2i(dstX + desiredWidth, dstY + desiredHeight);
glTexCoord2i(srcX, srcY + height);
glVertex2i(dstX, dstY + desiredHeight);
}
}
bool SafeOpenGLGraphics::drawImage2(const Image *const image,
int dstX, int dstY)
{
FUNC_BLOCK("Graphics::drawImage2", 1)
if (!image)
return false;
setColorAlpha(image->mAlpha);
bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
setTexturingAndBlending(true);
const SDL_Rect &bounds = image->mBounds;
// Draw a textured quad.
glBegin(GL_QUADS);
drawQuad(image, bounds.x, bounds.y,
dstX, dstY, bounds.w, bounds.h);
glEnd();
return true;
}
void SafeOpenGLGraphics::drawImageCached(const Image *const image,
int x, int y)
{
FUNC_BLOCK("Graphics::drawImageCached", 1)
if (!image)
return;
setColorAlpha(image->mAlpha);
bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
setTexturingAndBlending(true);
const SDL_Rect &bounds = image->mBounds;
// Draw a textured quad.
glBegin(GL_QUADS);
drawQuad(image, bounds.x, bounds.y, x, y, bounds.w, bounds.h);
glEnd();
}
void SafeOpenGLGraphics::drawPatternCached(const Image *const image,
const int x, const int y,
const int w, const int h)
{
FUNC_BLOCK("Graphics::drawPatternCached", 1)
if (!image)
return;
const SDL_Rect &imageRect = image->mBounds;
const int iw = imageRect.w;
const int ih = imageRect.h;
if (iw == 0 || ih == 0)
return;
const int srcX = imageRect.x;
const int srcY = imageRect.y;
setColorAlpha(image->mAlpha);
bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
setTexturingAndBlending(true);
// Draw a set of textured rectangles
glBegin(GL_QUADS);
for (int py = 0; py < h; py += ih)
{
const int height = (py + ih >= h) ? h - py : ih;
const int dstY = y + py;
for (int px = 0; px < w; px += iw)
{
int width = (px + iw >= w) ? w - px : iw;
int dstX = x + px;
drawQuad(image, srcX, srcY, dstX, dstY, width, height);
}
}
glEnd();
}
void SafeOpenGLGraphics::completeCache()
{
}
bool SafeOpenGLGraphics::drawRescaledImage(const Image *const image,
int dstX, int dstY,
const int desiredWidth,
const int desiredHeight)
{
FUNC_BLOCK("Graphics::drawRescaledImage", 1)
if (!image)
return false;
const SDL_Rect &imageRect = image->mBounds;
// Just draw the image normally when no resizing is necessary,
if (imageRect.w == desiredWidth && imageRect.h == desiredHeight)
return drawImage2(image, dstX, dstY);
setColorAlpha(image->mAlpha);
bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
setTexturingAndBlending(true);
// Draw a textured quad.
glBegin(GL_QUADS);
drawRescaledQuad(image, imageRect.x, imageRect.y, dstX, dstY,
imageRect.w, imageRect.h, desiredWidth, desiredHeight);
glEnd();
return true;
}
void SafeOpenGLGraphics::drawPattern(const Image *const image,
const int x, const int y,
const int w, const int h)
{
drawPatternInline(image, x, y, w, h);
}
void SafeOpenGLGraphics::drawPatternInline(const Image *const image,
const int x, const int y,
const int w, const int h)
{
FUNC_BLOCK("Graphics::drawPattern", 1)
if (!image)
return;
const SDL_Rect &imageRect = image->mBounds;
const int iw = imageRect.w;
const int ih = imageRect.h;
if (iw == 0 || ih == 0)
return;
const int srcX = imageRect.x;
const int srcY = imageRect.y;
setColorAlpha(image->mAlpha);
bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
setTexturingAndBlending(true);
// Draw a set of textured rectangles
glBegin(GL_QUADS);
for (int py = 0; py < h; py += ih)
{
const int height = (py + ih >= h) ? h - py : ih;
const int dstY = y + py;
for (int px = 0; px < w; px += iw)
{
int width = (px + iw >= w) ? w - px : iw;
int dstX = x + px;
drawQuad(image, srcX, srcY, dstX, dstY, width, height);
}
}
glEnd();
}
void SafeOpenGLGraphics::drawRescaledPattern(const Image *const image,
const int x, const int y,
const int w, const int h,
const int scaledWidth,
const int scaledHeight)
{
if (!image)
return;
const int iw = scaledWidth;
const int ih = scaledHeight;
if (iw == 0 || ih == 0)
return;
const SDL_Rect &imageRect = image->mBounds;
const int srcX = imageRect.x;
const int srcY = imageRect.y;
setColorAlpha(image->mAlpha);
bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
setTexturingAndBlending(true);
// Draw a set of textured rectangles
glBegin(GL_QUADS);
const float scaleFactorW = static_cast(scaledWidth)
/ image->getWidth();
const float scaleFactorH = static_cast(scaledHeight)
/ image->getHeight();
for (int py = 0; py < h; py += ih)
{
const int height = (py + ih >= h) ? h - py : ih;
const int dstY = y + py;
for (int px = 0; px < w; px += iw)
{
int width = (px + iw >= w) ? w - px : iw;
int dstX = x + px;
drawRescaledQuad(image, srcX, srcY, dstX, dstY,
width / scaleFactorW, height / scaleFactorH,
scaledWidth, scaledHeight);
}
}
glEnd();
}
void SafeOpenGLGraphics::calcTileCollection(ImageCollection *const
vertCol A_UNUSED,
const Image *const image A_UNUSED,
int x A_UNUSED, int y A_UNUSED)
{
}
void SafeOpenGLGraphics::calcTileVertexes(ImageVertexes *const vert A_UNUSED,
const Image *const image A_UNUSED,
int x A_UNUSED, int y A_UNUSED) const
{
}
void SafeOpenGLGraphics::calcTileVertexesInline(ImageVertexes *const
vert A_UNUSED,
const Image *const
image A_UNUSED,
int x A_UNUSED,
int y A_UNUSED) const
{
}
void SafeOpenGLGraphics::calcPattern(ImageVertexes *const vert A_UNUSED,
const Image *const image A_UNUSED,
const int x A_UNUSED,
const int y A_UNUSED,
const int w A_UNUSED,
const int h A_UNUSED) const
{
}
void SafeOpenGLGraphics::calcPatternInline(ImageVertexes *const vert A_UNUSED,
const Image *const image A_UNUSED,
const int x A_UNUSED,
const int y A_UNUSED,
const int w A_UNUSED,
const int h A_UNUSED) const
{
}
void SafeOpenGLGraphics::calcPattern(ImageCollection *const vert A_UNUSED,
const Image *const image A_UNUSED,
const int x A_UNUSED,
const int y A_UNUSED,
const int w A_UNUSED,
const int h A_UNUSED) const
{
}
void SafeOpenGLGraphics::drawTileVertexes(const ImageVertexes
*const vert A_UNUSED)
{
}
void SafeOpenGLGraphics::drawTileCollection(const ImageCollection *const
vertCol A_UNUSED)
{
}
void SafeOpenGLGraphics::updateScreen()
{
BLOCK_START("Graphics::updateScreen")
glFlush();
glFinish();
#ifdef USE_SDL2
SDL_GL_SwapWindow(mWindow);
#else
SDL_GL_SwapBuffers();
#endif
BLOCK_END("Graphics::updateScreen")
}
void SafeOpenGLGraphics::calcWindow(ImageCollection *const vertCol A_UNUSED,
const int x A_UNUSED, const int y A_UNUSED,
const int w A_UNUSED, const int h A_UNUSED,
const ImageRect &imgRect A_UNUSED)
{
}
void SafeOpenGLGraphics::_beginDraw()
{
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0.0, static_cast(mRect.w),
static_cast(mRect.h), 0.0, -1.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glEnable(GL_SCISSOR_TEST);
glDisable(GL_DITHER);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glDisable(GL_FOG);
glDisable(GL_COLOR_LOGIC_OP);
glDisable(GL_COLOR_MATERIAL);
glDisable(GL_STENCIL_TEST);
glShadeModel(GL_FLAT);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
pushClipArea(gcn::Rectangle(0, 0, mRect.w, mRect.h));
}
void SafeOpenGLGraphics::_endDraw()
{
popClipArea();
}
void SafeOpenGLGraphics::prepareScreenshot()
{
if (config.getBoolValue("usefbo"))
graphicsManager.createFBO(mRect.w, mRect.h, &mFbo);
}
SDL_Surface* SafeOpenGLGraphics::getScreenshot()
{
const int h = mRect.h;
const int w = mRect.w - (mRect.w % 4);
GLint pack = 1;
SDL_Surface *const screenshot = MSDL_CreateRGBSurface(
SDL_SWSURFACE, w, h, 24, 0xff0000, 0x00ff00, 0x0000ff, 0x000000);
if (!screenshot)
return nullptr;
if (SDL_MUSTLOCK(screenshot))
SDL_LockSurface(screenshot);
// Grap the pixel buffer and write it to the SDL surface
glGetIntegerv(GL_PACK_ALIGNMENT, &pack);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, screenshot->pixels);
// Flip the screenshot, as OpenGL has 0,0 in bottom left
unsigned int lineSize = 3 * w;
GLubyte* buf = new GLubyte[lineSize];
const int h2 = h / 2;
for (int i = 0; i < h2; i++)
{
GLubyte *const top = static_cast(
screenshot->pixels) + lineSize * i;
GLubyte *const bot = static_cast(
screenshot->pixels) + lineSize * (h - 1 - i);
memcpy(buf, top, lineSize);
memcpy(top, bot, lineSize);
memcpy(bot, buf, lineSize);
}
delete [] buf;
if (config.getBoolValue("usefbo"))
graphicsManager.deleteFBO(&mFbo);
glPixelStorei(GL_PACK_ALIGNMENT, pack);
if (SDL_MUSTLOCK(screenshot))
SDL_UnlockSurface(screenshot);
return screenshot;
}
bool SafeOpenGLGraphics::pushClipArea(gcn::Rectangle area)
{
int transX = 0;
int transY = 0;
if (!mClipStack.empty())
{
const gcn::ClipRectangle &clipArea = mClipStack.top();
transX = -clipArea.xOffset;
transY = -clipArea.yOffset;
}
const bool result = gcn::Graphics::pushClipArea(area);
const gcn::ClipRectangle &clipArea = mClipStack.top();
glPushMatrix();
glTranslatef(static_cast(transX + clipArea.xOffset),
static_cast(transY + clipArea.yOffset), 0);
glScissor(clipArea.x, mRect.h - clipArea.y - clipArea.height,
clipArea.width, clipArea.height);
return result;
}
void SafeOpenGLGraphics::popClipArea()
{
gcn::Graphics::popClipArea();
if (mClipStack.empty())
return;
glPopMatrix();
const gcn::ClipRectangle &clipArea = mClipStack.top();
glScissor(clipArea.x, mRect.h - clipArea.y - clipArea.height,
clipArea.width, clipArea.height);
}
void SafeOpenGLGraphics::drawPoint(int x, int y)
{
setTexturingAndBlending(false);
restoreColor();
glBegin(GL_POINTS);
glVertex2i(x, y);
glEnd();
}
void SafeOpenGLGraphics::drawLine(int x1, int y1, int x2, int y2)
{
setTexturingAndBlending(false);
restoreColor();
glBegin(GL_LINES);
glVertex2f(static_cast(x1) + 0.5F, static_cast(y1) + 0.5F);
glVertex2f(static_cast(x2) + 0.5F, static_cast(y2) + 0.5F);
glEnd();
glBegin(GL_POINTS);
glVertex2f(static_cast(x2) + 0.5F, static_cast(y2) + 0.5F);
glEnd();
}
void SafeOpenGLGraphics::drawRectangle(const gcn::Rectangle& rect)
{
drawRectangle(rect, false);
}
void SafeOpenGLGraphics::fillRectangle(const gcn::Rectangle& rect)
{
drawRectangle(rect, true);
}
void SafeOpenGLGraphics::setTexturingAndBlending(const bool enable)
{
if (enable)
{
if (!mTexture)
{
glEnable(OpenGLImageHelper::mTextureType);
mTexture = true;
}
if (!mAlpha)
{
glEnable(GL_BLEND);
mAlpha = true;
}
}
else
{
mLastImage = 0;
if (mAlpha && !mColorAlpha)
{
glDisable(GL_BLEND);
mAlpha = false;
}
else if (!mAlpha && mColorAlpha)
{
glEnable(GL_BLEND);
mAlpha = true;
}
if (mTexture)
{
glDisable(OpenGLImageHelper::mTextureType);
mTexture = false;
}
}
}
void SafeOpenGLGraphics::drawRectangle(const gcn::Rectangle& rect,
const bool filled)
{
BLOCK_START("Graphics::drawRectangle")
const float offset = filled ? 0 : 0.5F;
setTexturingAndBlending(false);
restoreColor();
glBegin(filled ? GL_QUADS : GL_LINE_LOOP);
glVertex2f(static_cast(rect.x) + offset,
static_cast(rect.y) + offset);
glVertex2f(static_cast(rect.x + rect.width) - offset,
static_cast(rect.y) + offset);
glVertex2f(static_cast(rect.x + rect.width) - offset,
static_cast(rect.y + rect.height) - offset);
glVertex2f(static_cast(rect.x) + offset,
static_cast(rect.y + rect.height) - offset);
glEnd();
BLOCK_END("Graphics::drawRectangle")
}
void SafeOpenGLGraphics::bindTexture(const GLenum target, const GLuint texture)
{
if (mLastImage != texture)
{
mLastImage = texture;
glBindTexture(target, texture);
}
}
void SafeOpenGLGraphics::setColorAlpha(const float alpha)
{
if (!mIsByteColor && mFloatColor == alpha)
return;
glColor4f(1.0F, 1.0F, 1.0F, alpha);
mIsByteColor = false;
mFloatColor = alpha;
}
void SafeOpenGLGraphics::restoreColor()
{
if (mIsByteColor && mByteColor == mColor)
return;
glColor4ub(static_cast(mColor.r),
static_cast(mColor.g),
static_cast(mColor.b),
static_cast(mColor.a));
mIsByteColor = true;
mByteColor = mColor;
}
void SafeOpenGLGraphics::drawImageRect(const int x, const int y,
const int w, const int h,
const ImageRect &imgRect)
{
#include "render/graphics_drawImageRect.hpp"
}
void SafeOpenGLGraphics::calcImageRect(ImageVertexes *const vert,
const int x, const int y,
const int w, const int h,
const ImageRect &imgRect)
{
#include "render/graphics_calcImageRect.hpp"
}
#endif // USE_OPENGL