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Diffstat (limited to 'src/safeopenglgraphics.cpp')
| -rw-r--r-- | src/safeopenglgraphics.cpp | 691 |
1 files changed, 691 insertions, 0 deletions
diff --git a/src/safeopenglgraphics.cpp b/src/safeopenglgraphics.cpp new file mode 100644 index 000000000..cc8bcc95b --- /dev/null +++ b/src/safeopenglgraphics.cpp @@ -0,0 +1,691 @@ +/* + * The ManaPlus Client + * Copyright (C) 2004-2009 The Mana World Development Team + * Copyright (C) 2009-2010 The Mana Developers + * Copyright (C) 2011-2012 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" + +#ifdef USE_OPENGL +#include "safeopenglgraphics.h" + +#include "configuration.h" +#include "graphicsvertexes.h" +#include "logger.h" + +#include "resources/image.h" +#include "resources/openglimagehelper.h" + +#include <SDL.h> + +#include "debug.h" + +#ifndef GL_TEXTURE_RECTANGLE_ARB +#define GL_TEXTURE_RECTANGLE_ARB 0x84F5 +#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8 +#endif + +GLuint SafeOpenGLGraphics::mLastImage = 0; + +SafeOpenGLGraphics::SafeOpenGLGraphics(): + mAlpha(false), mTexture(false), mColorAlpha(false), + mFboId(0), mTextureId(0), mRboId(0) +{ + mOpenGL = 2; + mName = "safe OpenGL"; +} + +SafeOpenGLGraphics::~SafeOpenGLGraphics() +{ +} + +bool SafeOpenGLGraphics::setVideoMode(int w, int h, int bpp, bool fs, + bool hwaccel, bool resize, bool noFrame) +{ + setMainFlags(w, h, bpp, fs, hwaccel, resize, noFrame); + + return setOpenGLMode(); +} + +static inline void drawQuad(const Image *image, + int srcX, int srcY, int dstX, int dstY, + int width, int height) +{ + if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D) + { + // Find OpenGL normalized texture coordinates. + float texX1 = static_cast<float>(srcX) + / static_cast<float>(image->getTextureWidth()); + float texY1 = static_cast<float>(srcY) + / static_cast<float>(image->getTextureHeight()); + float texX2 = static_cast<float>(srcX + width) / static_cast<float>( + image->getTextureWidth()); + float texY2 = static_cast<float>(srcY + height) / static_cast<float>( + image->getTextureHeight()); + + 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(Image *image, int srcX, int srcY, + int dstX, int dstY, int width, int height, + int desiredWidth, int desiredHeight) +{ + if (OpenGLImageHelper::mTextureType == GL_TEXTURE_2D) + { + // Find OpenGL normalized texture coordinates. + float texX1 = static_cast<float>(srcX) + / static_cast<float>(image->getTextureWidth()); + float texY1 = static_cast<float>(srcY) + / static_cast<float>(image->getTextureHeight()); + float texX2 = static_cast<float>(srcX + width) / static_cast<float>( + image->getTextureWidth()); + float texY2 = static_cast<float>(srcY + height) / static_cast<float>( + image->getTextureHeight()); + + 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 *image, int srcX, int srcY, + int dstX, int dstY, + int width, int height, bool useColor) +{ + if (!image) + return false; + + srcX += image->mBounds.x; + srcY += image->mBounds.y; + + if (!useColor) + glColor4f(1.0f, 1.0f, 1.0f, image->mAlpha); + + bindTexture(OpenGLImageHelper::mTextureType, image->mGLImage); + + setTexturingAndBlending(true); + + // Draw a textured quad. + glBegin(GL_QUADS); + drawQuad(image, srcX, srcY, dstX, dstY, width, height); + glEnd(); + + if (!useColor) + { + glColor4ub(static_cast<GLubyte>(mColor.r), + static_cast<GLubyte>(mColor.g), + static_cast<GLubyte>(mColor.b), + static_cast<GLubyte>(mColor.a)); + } + + return true; +} + +bool SafeOpenGLGraphics::drawRescaledImage(Image *image, int srcX, int srcY, + int dstX, int dstY, + int width, int height, + int desiredWidth, int desiredHeight, + bool useColor) +{ + return drawRescaledImage(image, srcX, srcY, + dstX, dstY, + width, height, + desiredWidth, desiredHeight, + useColor, true); +} + +bool SafeOpenGLGraphics::drawRescaledImage(Image *image, int srcX, int srcY, + int dstX, int dstY, + int width, int height, + int desiredWidth, int desiredHeight, + bool useColor, bool smooth) +{ + 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) + glColor4f(1.0f, 1.0f, 1.0f, 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... + { + glColor4f(1.0f, 1.0f, 1.0f, 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(); + + if (!useColor) + { + glColor4ub(static_cast<GLubyte>(mColor.r), + static_cast<GLubyte>(mColor.g), + static_cast<GLubyte>(mColor.b), + static_cast<GLubyte>(mColor.a)); + } + + return true; +} + +/* Optimising the functions that Graphics::drawImagePattern would call, + * so that glBegin...glEnd are outside the main loop. */ +void SafeOpenGLGraphics::drawImagePattern(const Image *image, int x, int y, + int w, int h) +{ + if (!image) + return; + + const int srcX = image->mBounds.x; + const int srcY = image->mBounds.y; + + const int iw = image->mBounds.w; + const int ih = image->mBounds.h; + if (iw == 0 || ih == 0) + return; + + glColor4f(1.0f, 1.0f, 1.0f, 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(); + + glColor4ub(static_cast<GLubyte>(mColor.r), + static_cast<GLubyte>(mColor.g), + static_cast<GLubyte>(mColor.b), + static_cast<GLubyte>(mColor.a)); +} + +void SafeOpenGLGraphics::drawRescaledImagePattern(Image *image, int x, int y, + int w, int h, + int scaledWidth, + int scaledHeight) +{ + if (!image) + return; + + const int srcX = image->mBounds.x; + const int srcY = image->mBounds.y; + + const int iw = scaledWidth; + const int ih = scaledHeight; + if (iw == 0 || ih == 0) + return; + + glColor4f(1.0f, 1.0f, 1.0f, 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(); + + glColor4ub(static_cast<GLubyte>(mColor.r), static_cast<GLubyte>(mColor.g), + static_cast<GLubyte>(mColor.b), static_cast<GLubyte>(mColor.a)); +} + +bool SafeOpenGLGraphics::calcImageRect(GraphicsVertexes* vert, + int x, int y, int w, int h, + Image *topLeft A_UNUSED, + Image *topRight A_UNUSED, + Image *bottomLeft A_UNUSED, + Image *bottomRight A_UNUSED, + Image *top A_UNUSED, Image *right A_UNUSED, + Image *bottom A_UNUSED, + Image *left A_UNUSED, + Image *center A_UNUSED) +{ + if (!vert) + return false; + + vert->init(x, y, w, h); + return true; +} + +void SafeOpenGLGraphics::calcTile(ImageVertexes *vert A_UNUSED, + int x A_UNUSED, int y A_UNUSED) +{ + +} + +void SafeOpenGLGraphics::drawTile(ImageVertexes *vert A_UNUSED) +{ + +} + +void SafeOpenGLGraphics::drawImageRect2(GraphicsVertexes* vert, + const ImageRect &imgRect) +{ + if (!vert) + return; + + drawImageRect(vert->getX(), vert->getY(), vert->getW(), vert->getH(), + imgRect.grid[0], imgRect.grid[2], imgRect.grid[6], imgRect.grid[8], + imgRect.grid[1], imgRect.grid[5], imgRect.grid[7], imgRect.grid[3], + imgRect.grid[4]); +} + +void SafeOpenGLGraphics::updateScreen() +{ + glFlush(); + glFinish(); + SDL_GL_SwapBuffers(); +} + +void SafeOpenGLGraphics::_beginDraw() +{ + glMatrixMode(GL_TEXTURE); + glLoadIdentity(); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + + glOrtho(0.0, static_cast<double>(mTarget->w), + static_cast<double>(mTarget->h), 0.0, -1.0, 1.0); + + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + + glEnable(GL_SCISSOR_TEST); + + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + + pushClipArea(gcn::Rectangle(0, 0, mTarget->w, mTarget->h)); +} + +void SafeOpenGLGraphics::_endDraw() +{ + popClipArea(); +} + +void SafeOpenGLGraphics::prepareScreenshot() +{ +#if !defined(_WIN32) + if (config.getBoolValue("usefbo")) + { + int h = mTarget->h; + int w = mTarget->w; + + // create a texture object + glGenTextures(1, &mTextureId); + glBindTexture(GL_TEXTURE_2D, mTextureId); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, w, h, 0, + GL_RGBA, GL_UNSIGNED_BYTE, nullptr); + glBindTexture(GL_TEXTURE_2D, 0); + + // create a renderbuffer object to store depth info + glGenRenderbuffersEXT(1, &mRboId); + glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mRboId); + glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, + GL_DEPTH_COMPONENT, w, h); + glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0); + + // create a framebuffer object + glGenFramebuffersEXT(1, &mFboId); + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFboId); + + // attach the texture to FBO color attachment point + glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, + GL_TEXTURE_2D, mTextureId, 0); + + // attach the renderbuffer to depth attachment point + glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, + GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, mRboId); + + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, mFboId); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + } +#endif +} + +SDL_Surface* SafeOpenGLGraphics::getScreenshot() +{ + const int h = mTarget->h; + const int w = mTarget->w - (mTarget->w % 4); + GLint pack = 1; + + SDL_Surface *screenshot = SDL_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)); + + for (int i = 0; i < (h / 2); i++) + { + GLubyte *top = static_cast<GLubyte*>( + screenshot->pixels) + lineSize * i; + GLubyte *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 !defined(_WIN32) + if (config.getBoolValue("usefbo")) + { + glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0); + if (mFboId) + { + glDeleteFramebuffersEXT(1, &mFboId); + mFboId = 0; + } + glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0); + if (mRboId) + { + glDeleteRenderbuffersEXT(1, &mRboId); + mRboId = 0; + } + if (mTextureId) + { + glDeleteTextures(1, &mTextureId); + mTextureId = 0; + } + } +#endif + + 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; + } + + bool result = gcn::Graphics::pushClipArea(area); + + const gcn::ClipRectangle &clipArea = mClipStack.top(); + transX += clipArea.xOffset; + transY += clipArea.yOffset; + + glPushMatrix(); + glTranslatef(static_cast<GLfloat>(transX), + static_cast<GLfloat>(transY), 0); + glScissor(clipArea.x, mTarget->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, mTarget->h - clipArea.y - clipArea.height, + clipArea.width, clipArea.height); +} + +void SafeOpenGLGraphics::setColor(const gcn::Color& color) +{ + mColor = color; + glColor4ub(static_cast<GLubyte>(color.r), + static_cast<GLubyte>(color.g), + static_cast<GLubyte>(color.b), + static_cast<GLubyte>(color.a)); + + mColorAlpha = (color.a != 255); +} + +void SafeOpenGLGraphics::drawPoint(int x, int y) +{ + setTexturingAndBlending(false); + + glBegin(GL_POINTS); + glVertex2i(x, y); + glEnd(); +} + +void SafeOpenGLGraphics::drawLine(int x1, int y1, int x2, int y2) +{ + setTexturingAndBlending(false); + + 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(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, bool filled) +{ + const float offset = filled ? 0 : 0.5f; + + setTexturingAndBlending(false); + + 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(); +} + +void SafeOpenGLGraphics::bindTexture(GLenum target, GLuint texture) +{ + if (mLastImage != texture) + { + mLastImage = texture; + glBindTexture(target, texture); + } +} + +#endif // USE_OPENGL |