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-rw-r--r--src/render/safeopenglgraphics.cpp654
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diff --git a/src/render/safeopenglgraphics.cpp b/src/render/safeopenglgraphics.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) 2011-2013 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include "main.h"
+
+#if defined USE_OPENGL && !defined ANDROID
+#include "render/safeopenglgraphics.h"
+
+#include "configuration.h"
+#include "graphicsmanager.h"
+#include "graphicsvertexes.h"
+#include "logger.h"
+
+#include "resources/image.h"
+#include "resources/openglimagehelper.h"
+
+#include "utils/sdlcheckutils.h"
+
+#include <SDL.h>
+
+#include "debug.h"
+
+GLuint SafeOpenGLGraphics::mLastImage = 0;
+
+SafeOpenGLGraphics::SafeOpenGLGraphics():
+ mTexture(false),
+ mIsByteColor(false),
+ mByteColor(),
+ mFloatColor(1.0f),
+ mColorAlpha(false),
+ mFbo()
+{
+ mOpenGL = 2;
+ 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<float>(image->mTexWidth);
+ const float th = static_cast<float>(image->mTexHeight);
+ // Find OpenGL normalized texture coordinates.
+ const float texX1 = static_cast<float>(srcX) / tw;
+ const float texY1 = static_cast<float>(srcY) / th;
+ const float texX2 = static_cast<float>(srcX + width) / tw;
+ const float texY2 = static_cast<float>(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<float>(image->mTexWidth);
+ const float th = static_cast<float>(image->mTexHeight);
+ // Find OpenGL normalized texture coordinates.
+ const float texX1 = static_cast<float>(srcX) / tw;
+ const float texY1 = static_cast<float>(srcY) / th;
+ const float texX2 = static_cast<float>(srcX + width) / tw;
+ const float texY2 = static_cast<float>(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 srcX, int srcY,
+ int dstX, int dstY,
+ const int width, const int height,
+ const bool useColor)
+{
+ FUNC_BLOCK("Graphics::drawImage2", 1)
+ if (!image)
+ return false;
+
+ if (!useColor)
+ setColorAlpha(image->mAlpha);
+
+ bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+
+ setTexturingAndBlending(true);
+
+ // Draw a textured quad.
+ glBegin(GL_QUADS);
+ drawQuad(image, srcX + image->mBounds.x, srcY + image->mBounds.y,
+ dstX, dstY, width, height);
+ glEnd();
+
+ return true;
+}
+
+bool SafeOpenGLGraphics::drawRescaledImage(const Image *const image, int srcX,
+ int srcY, int dstX, int dstY,
+ const int width, const int height,
+ const int desiredWidth,
+ const int desiredHeight,
+ const bool useColor)
+{
+ return drawRescaledImage(image, srcX, srcY,
+ dstX, dstY,
+ width, height,
+ desiredWidth, desiredHeight,
+ useColor, true);
+}
+
+bool SafeOpenGLGraphics::drawRescaledImage(const Image *const image, int srcX,
+ int srcY, int dstX, int dstY,
+ const int width, const int height,
+ const int desiredWidth,
+ const int desiredHeight,
+ const bool useColor,
+ bool smooth)
+{
+ FUNC_BLOCK("Graphics::drawRescaledImage", 1)
+ if (!image)
+ return false;
+
+ // Just draw the image normally when no resizing is necessary,
+ if (width == desiredWidth && height == desiredHeight)
+ {
+ return drawImage2(image, srcX, srcY, dstX, dstY,
+ width, height, useColor);
+ }
+
+ // When the desired image is smaller than the current one,
+ // disable smooth effect.
+ if (width > desiredWidth && height > desiredHeight)
+ smooth = false;
+
+ srcX += image->mBounds.x;
+ srcY += image->mBounds.y;
+
+ if (!useColor)
+ setColorAlpha(image->mAlpha);
+
+ bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage);
+
+ setTexturingAndBlending(true);
+
+ // Draw a textured quad.
+ glBegin(GL_QUADS);
+ drawRescaledQuad(image, srcX, srcY, dstX, dstY, width, height,
+ desiredWidth, desiredHeight);
+
+ if (smooth) // A basic smooth effect...
+ {
+ setColorAlpha(0.2f);
+ drawRescaledQuad(image, srcX, srcY, dstX - 1, dstY - 1, width, height,
+ desiredWidth + 1, desiredHeight + 1);
+ drawRescaledQuad(image, srcX, srcY, dstX + 1, dstY + 1, width, height,
+ desiredWidth - 1, desiredHeight - 1);
+
+ drawRescaledQuad(image, srcX, srcY, dstX + 1, dstY, width, height,
+ desiredWidth - 1, desiredHeight);
+ drawRescaledQuad(image, srcX, srcY, dstX, dstY + 1, width, height,
+ desiredWidth, desiredHeight - 1);
+ }
+
+ glEnd();
+
+ return true;
+}
+
+/* Optimising the functions that Graphics::drawImagePattern would call,
+ * so that glBegin...glEnd are outside the main loop. */
+void SafeOpenGLGraphics::drawImagePattern(const Image *const image,
+ const int x, const int y,
+ const int w, const int h)
+{
+ FUNC_BLOCK("Graphics::drawImagePattern", 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::drawRescaledImagePattern(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<float>(scaledWidth)
+ / image->getWidth();
+ const float scaleFactorH = static_cast<float>(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::calcTile(ImageCollection *const vertCol A_UNUSED,
+ const Image *const image A_UNUSED,
+ int x A_UNUSED, int y A_UNUSED)
+{
+}
+
+void SafeOpenGLGraphics::calcTile(ImageVertexes *const vert A_UNUSED,
+ const Image *const image A_UNUSED,
+ int x A_UNUSED, int y A_UNUSED) const
+{
+}
+
+void SafeOpenGLGraphics::calcImagePattern(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::calcImagePattern(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::drawTile(const ImageVertexes *const vert A_UNUSED)
+{
+}
+
+void SafeOpenGLGraphics::drawTile(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")
+}
+
+bool 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)
+{
+ return false;
+}
+
+void SafeOpenGLGraphics::_beginDraw()
+{
+ glMatrixMode(GL_TEXTURE);
+ glLoadIdentity();
+
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+
+ glOrtho(0.0, static_cast<double>(mRect.w),
+ static_cast<double>(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 = static_cast<GLubyte*>(malloc(lineSize));
+
+ const int h2 = h / 2;
+ for (int i = 0; i < h2; i++)
+ {
+ GLubyte *const top = static_cast<GLubyte*>(
+ screenshot->pixels) + lineSize * i;
+ GLubyte *const bot = static_cast<GLubyte*>(
+ screenshot->pixels) + lineSize * (h - 1 - i);
+
+ memcpy(buf, top, lineSize);
+ memcpy(top, bot, lineSize);
+ memcpy(bot, buf, lineSize);
+ }
+
+ free(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<GLfloat>(transX + clipArea.xOffset),
+ static_cast<GLfloat>(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<float>(x1) + 0.5f, static_cast<float>(y1) + 0.5f);
+ glVertex2f(static_cast<float>(x2) + 0.5f, static_cast<float>(y2) + 0.5f);
+ glEnd();
+
+ glBegin(GL_POINTS);
+ glVertex2f(static_cast<float>(x2) + 0.5f, static_cast<float>(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::setTargetPlane(int width A_UNUSED,
+ int height A_UNUSED)
+{
+}
+
+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<float>(rect.x) + offset,
+ static_cast<float>(rect.y) + offset);
+ glVertex2f(static_cast<float>(rect.x + rect.width) - offset,
+ static_cast<float>(rect.y) + offset);
+ glVertex2f(static_cast<float>(rect.x + rect.width) - offset,
+ static_cast<float>(rect.y + rect.height) - offset);
+ glVertex2f(static_cast<float>(rect.x) + offset,
+ static_cast<float>(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<GLubyte>(mColor.r),
+ static_cast<GLubyte>(mColor.g),
+ static_cast<GLubyte>(mColor.b),
+ static_cast<GLubyte>(mColor.a));
+ mIsByteColor = true;
+ mByteColor = mColor;
+}
+
+#endif // USE_OPENGL