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Diffstat (limited to 'src/resources/imagehelper.cpp')
| -rw-r--r-- | src/resources/imagehelper.cpp | 582 |
1 files changed, 582 insertions, 0 deletions
diff --git a/src/resources/imagehelper.cpp b/src/resources/imagehelper.cpp new file mode 100644 index 000000000..9ee52267e --- /dev/null +++ b/src/resources/imagehelper.cpp @@ -0,0 +1,582 @@ +/* + * 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 "resources/imagehelper.h" + +#include "resources/dye.h" +#include "resources/resourcemanager.h" + +#ifdef USE_OPENGL +#include "openglgraphics.h" +#include "opengl1graphics.h" +#endif + +#include "client.h" +#include "logger.h" +#include "main.h" + +#include "utils/stringutils.h" + +#include "resources/image.h" + +#include <SDL_image.h> +#include <SDL_rotozoom.h> + +#include "debug.h" + +#ifdef USE_OPENGL +int ImageHelper::mUseOpenGL = 0; +int ImageHelper::mTextureType = 0; +int ImageHelper::mInternalTextureType = GL_RGBA8; +int ImageHelper::mTextureSize = 0; +bool ImageHelper::mBlur = true; +#endif +bool ImageHelper::mEnableAlphaCache = false; +bool ImageHelper::mEnableAlpha = true; + +Resource *ImageHelper::load(SDL_RWops *rw) +{ + SDL_Surface *tmpImage = IMG_Load_RW(rw, 1); + + if (!tmpImage) + { + logger->log("Error, image load failed: %s", IMG_GetError()); + return nullptr; + } + + Image *image = load(tmpImage); + + SDL_FreeSurface(tmpImage); + return image; +} + +Resource *ImageHelper::load(SDL_RWops *rw, Dye const &dye) +{ + SDL_Surface *tmpImage = IMG_Load_RW(rw, 1); + + if (!tmpImage) + { + logger->log("Error, image load failed: %s", IMG_GetError()); + return nullptr; + } + + SDL_Surface *surf = nullptr; + SDL_PixelFormat rgba; + rgba.palette = nullptr; + rgba.BitsPerPixel = 32; + rgba.BytesPerPixel = 4; + rgba.colorkey = 0; + rgba.alpha = 255; + if (mUseOpenGL) + { + surf = convertTo32Bit(tmpImage); + SDL_FreeSurface(tmpImage); + + Uint32 *pixels = static_cast<Uint32 *>(surf->pixels); + DyePalette *pal = dye.getSPalete(); + + if (pal) + { + for (Uint32 *p_end = pixels + surf->w * surf->h; + pixels != p_end; ++pixels) + { + Uint8 *p = (Uint8 *)pixels; + const int alpha = *p & 255; + if (!alpha) + continue; + pal->replaceOGLColor(p); + } + } + else + { + for (Uint32 *p_end = pixels + surf->w * surf->h; + pixels != p_end; ++pixels) + { + const Uint32 p = *pixels; + const int alpha = (p >> 24) & 255; + if (!alpha) + continue; + int v[3]; + v[0] = (p) & 255; + v[1] = (p >> 8) & 255; + v[2] = (p >> 16 ) & 255; + dye.update(v); + *pixels = (v[0]) | (v[1] << 8) | (v[2] << 16) | (alpha << 24); + } + } + } + else + { + rgba.Rmask = 0xFF000000; rgba.Rloss = 0; rgba.Rshift = 24; + rgba.Gmask = 0x00FF0000; rgba.Gloss = 0; rgba.Gshift = 16; + rgba.Bmask = 0x0000FF00; rgba.Bloss = 0; rgba.Bshift = 8; + rgba.Amask = 0x000000FF; rgba.Aloss = 0; rgba.Ashift = 0; + + surf = SDL_ConvertSurface(tmpImage, &rgba, SDL_SWSURFACE); + SDL_FreeSurface(tmpImage); + + Uint32 *pixels = static_cast<Uint32 *>(surf->pixels); + DyePalette *pal = dye.getSPalete(); + + if (pal) + { + for (Uint32 *p_end = pixels + surf->w * surf->h; + pixels != p_end; ++pixels) + { + Uint8 *p = (Uint8 *)pixels; + const int alpha = *p & 255; + if (!alpha) + continue; + pal->replaceColor(p + 1); + } + } + else + { + for (Uint32 *p_end = pixels + surf->w * surf->h; + pixels != p_end; ++pixels) + { + const Uint32 p = *pixels; + const int alpha = p & 255; + if (!alpha) + continue; + int v[3]; + v[0] = (p >> 24) & 255; + v[1] = (p >> 16) & 255; + v[2] = (p >> 8 ) & 255; + dye.update(v); + *pixels = (v[0] << 24) | (v[1] << 16) | (v[2] << 8) | alpha; + } + } + } + + Image *image = load(surf); + SDL_FreeSurface(surf); + return image; +} + +Image *ImageHelper::load(SDL_Surface *tmpImage) +{ +#ifdef USE_OPENGL + if (mUseOpenGL) + return _GLload(tmpImage); +#endif + return _SDLload(tmpImage); +} + +Image *ImageHelper::createTextSurface(SDL_Surface *tmpImage, float alpha) +{ + if (!tmpImage) + return nullptr; + + Image *img; +#ifdef USE_OPENGL + if (mUseOpenGL) + { + img = _GLload(tmpImage); + if (img) + img->setAlpha(alpha); + return img; + } +#endif + + bool hasAlpha = false; + bool converted = false; + + const int sz = tmpImage->w * tmpImage->h; + + // The alpha channel to be filled with alpha values + Uint8 *alphaChannel = new Uint8[sz]; + + const SDL_PixelFormat * const fmt = tmpImage->format; + if (fmt->Amask) + { + for (int i = 0; i < sz; ++ i) + { + Uint32 c = (static_cast<Uint32*>(tmpImage->pixels))[i]; + + unsigned v = (c & fmt->Amask) >> fmt->Ashift; + Uint8 a = (v << fmt->Aloss) + (v >> (8 - (fmt->Aloss << 1))); + + Uint8 a2 = static_cast<Uint8>(static_cast<float>(a) * alpha); + + c &= ~fmt->Amask; + c |= ((a2 >> fmt->Aloss) << fmt->Ashift & fmt->Amask); + (static_cast<Uint32*>(tmpImage->pixels))[i] = c; + + if (a != 255) + hasAlpha = true; + + alphaChannel[i] = a; + } + } + + SDL_Surface *image; + + // Convert the surface to the current display format + if (hasAlpha) + { + image = SDL_DisplayFormatAlpha(tmpImage); + } + else + { + image = SDL_DisplayFormat(tmpImage); + + // We also delete the alpha channel since + // it's not used. + delete [] alphaChannel; + alphaChannel = nullptr; + } + + if (!image) + { + logger->log1("Error: Image convert failed."); + delete [] alphaChannel; + return nullptr; + } + + if (converted) + SDL_FreeSurface(tmpImage); + + img = new Image(image, hasAlpha, alphaChannel); + img->mAlpha = alpha; + return img; +} + +SDL_Surface* ImageHelper::convertTo32Bit(SDL_Surface* tmpImage) +{ + if (!tmpImage) + return nullptr; + SDL_PixelFormat RGBAFormat; + RGBAFormat.palette = nullptr; + RGBAFormat.colorkey = 0; + RGBAFormat.alpha = 0; + RGBAFormat.BitsPerPixel = 32; + RGBAFormat.BytesPerPixel = 4; +#if SDL_BYTEORDER == SDL_BIG_ENDIAN + RGBAFormat.Rmask = 0xFF000000; + RGBAFormat.Rshift = 0; + RGBAFormat.Rloss = 0; + RGBAFormat.Gmask = 0x00FF0000; + RGBAFormat.Gshift = 8; + RGBAFormat.Gloss = 0; + RGBAFormat.Bmask = 0x0000FF00; + RGBAFormat.Bshift = 16; + RGBAFormat.Bloss = 0; + RGBAFormat.Amask = 0x000000FF; + RGBAFormat.Ashift = 24; + RGBAFormat.Aloss = 0; +#else + RGBAFormat.Rmask = 0x000000FF; + RGBAFormat.Rshift = 24; + RGBAFormat.Rloss = 0; + RGBAFormat.Gmask = 0x0000FF00; + RGBAFormat.Gshift = 16; + RGBAFormat.Gloss = 0; + RGBAFormat.Bmask = 0x00FF0000; + RGBAFormat.Bshift = 8; + RGBAFormat.Bloss = 0; + RGBAFormat.Amask = 0xFF000000; + RGBAFormat.Ashift = 0; + RGBAFormat.Aloss = 0; +#endif + return SDL_ConvertSurface(tmpImage, &RGBAFormat, SDL_SWSURFACE); +} + +SDL_Surface* ImageHelper::SDLDuplicateSurface(SDL_Surface* tmpImage) +{ + if (!tmpImage || !tmpImage->format) + return nullptr; + + return SDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE); +} + +Image *ImageHelper::_SDLload(SDL_Surface *tmpImage) +{ + if (!tmpImage) + return nullptr; + + bool hasAlpha = false; + bool converted = false; + + if (tmpImage->format->BitsPerPixel != 32) + { + tmpImage = convertTo32Bit(tmpImage); + + if (!tmpImage) + return nullptr; + converted = true; + } + + const int sz = tmpImage->w * tmpImage->h; + + // The alpha channel to be filled with alpha values + Uint8 *alphaChannel = new Uint8[sz]; + + // Figure out whether the image uses its alpha layer + if (!tmpImage->format->palette) + { + const SDL_PixelFormat * const fmt = tmpImage->format; + if (fmt->Amask) + { + for (int i = 0; i < sz; ++ i) + { + unsigned v = ((static_cast<Uint32*>(tmpImage->pixels))[i] + & fmt->Amask) >> fmt->Ashift; + Uint8 a = (v << fmt->Aloss) + (v >> (8 - (fmt->Aloss << 1))); + + if (a != 255) + hasAlpha = true; + + alphaChannel[i] = a; + } + } + else + { + if (SDL_ALPHA_OPAQUE != 255) + { + hasAlpha = true; + memset(alphaChannel, SDL_ALPHA_OPAQUE, sz); + } + } + } + else + { + if (SDL_ALPHA_OPAQUE != 255) + { + hasAlpha = true; + memset(alphaChannel, SDL_ALPHA_OPAQUE, sz); + } + } + + SDL_Surface *image; + + // Convert the surface to the current display format + if (hasAlpha) + { + image = SDL_DisplayFormatAlpha(tmpImage); + } + else + { + image = SDL_DisplayFormat(tmpImage); + + // We also delete the alpha channel since + // it's not used. + delete [] alphaChannel; + alphaChannel = nullptr; + } + + if (!image) + { + logger->log1("Error: Image convert failed."); + delete [] alphaChannel; + return nullptr; + } + + if (converted) + SDL_FreeSurface(tmpImage); + + return new Image(image, hasAlpha, alphaChannel); +} + +#ifdef USE_OPENGL +int ImageHelper::powerOfTwo(int input) +{ + int value; + if (mTextureType == GL_TEXTURE_2D) + { + value = 1; + while (value < input && value < mTextureSize) + value <<= 1; + } + else + { + value = input; + } + return value >= mTextureSize ? mTextureSize : value; +} + +Image *ImageHelper::_GLload(SDL_Surface *tmpImage) +{ + if (!tmpImage) + return nullptr; + + // Flush current error flag. + glGetError(); + + int width = tmpImage->w; + int height = tmpImage->h; + int realWidth = powerOfTwo(width); + int realHeight = powerOfTwo(height); + + if (realWidth < width || realHeight < height) + { + logger->log("Warning: image too large, cropping to %dx%d texture!", + tmpImage->w, tmpImage->h); + } + + // Make sure the alpha channel is not used, but copied to destination + SDL_SetAlpha(tmpImage, 0, SDL_ALPHA_OPAQUE); + + // Determine 32-bit masks based on byte order + Uint32 rmask, gmask, bmask, amask; +#if SDL_BYTEORDER == SDL_BIG_ENDIAN + rmask = 0xff000000; + gmask = 0x00ff0000; + bmask = 0x0000ff00; + amask = 0x000000ff; +#else + rmask = 0x000000ff; + gmask = 0x0000ff00; + bmask = 0x00ff0000; + amask = 0xff000000; +#endif + + SDL_Surface *oldImage = nullptr; + if (tmpImage->format->BitsPerPixel != 32 + || realWidth != width || realHeight != height + || rmask != tmpImage->format->Rmask + || gmask != tmpImage->format->Gmask + || amask != tmpImage->format->Amask) + { + oldImage = tmpImage; + tmpImage = SDL_CreateRGBSurface(SDL_SWSURFACE, realWidth, realHeight, + 32, rmask, gmask, bmask, amask); + + if (!tmpImage) + { + logger->log("Error, image convert failed: out of memory"); + return nullptr; + } + SDL_BlitSurface(oldImage, nullptr, tmpImage, nullptr); + } + + GLuint texture; + glGenTextures(1, &texture); + if (mUseOpenGL == 1) + OpenGLGraphics::bindTexture(mTextureType, texture); + else if (mUseOpenGL == 2) + OpenGL1Graphics::bindTexture(mTextureType, texture); + + if (SDL_MUSTLOCK(tmpImage)) + SDL_LockSurface(tmpImage); + + glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); + if (mBlur) + { + glTexParameteri(mTextureType, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(mTextureType, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + } + else + { + glTexParameteri(mTextureType, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(mTextureType, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + } + + glTexImage2D(mTextureType, 0, mInternalTextureType, + tmpImage->w, tmpImage->h, + 0, GL_RGBA, GL_UNSIGNED_BYTE, tmpImage->pixels); + +/* + GLint compressed; + glGetTexLevelParameteriv(mTextureType, 0, + GL_TEXTURE_COMPRESSED_ARB, &compressed); + if (compressed) + logger->log("image compressed"); + else + logger->log("image not compressed"); +*/ + +#ifdef DEBUG_OPENGL_LEAKS + textures_count ++; +#endif + + if (SDL_MUSTLOCK(tmpImage)) + SDL_UnlockSurface(tmpImage); + + if (oldImage) + SDL_FreeSurface(tmpImage); + + GLenum error = glGetError(); + if (error) + { + std::string errmsg = "Unknown error"; + switch (error) + { + case GL_INVALID_ENUM: + errmsg = "GL_INVALID_ENUM"; + break; + case GL_INVALID_VALUE: + errmsg = "GL_INVALID_VALUE"; + break; + case GL_INVALID_OPERATION: + errmsg = "GL_INVALID_OPERATION"; + break; + case GL_STACK_OVERFLOW: + errmsg = "GL_STACK_OVERFLOW"; + break; + case GL_STACK_UNDERFLOW: + errmsg = "GL_STACK_UNDERFLOW"; + break; + case GL_OUT_OF_MEMORY: + errmsg = "GL_OUT_OF_MEMORY"; + break; + default: + break; + } + logger->log("Error: Image GL import failed: %s", errmsg.c_str()); + return nullptr; + } + + return new Image(texture, width, height, realWidth, realHeight); +} + +void ImageHelper::setLoadAsOpenGL(int useOpenGL) +{ + ImageHelper::mUseOpenGL = useOpenGL; +} + +#endif + +void ImageHelper::dumpSurfaceFormat(SDL_Surface *image) +{ + if (image->format) + { + const SDL_PixelFormat * const format = image->format; + logger->log("Bytes per pixel: %d", format->BytesPerPixel); + logger->log("Alpha: %d", format->alpha); + logger->log("Loss: %02x, %02x, %02x, %02x", (int)format->Rloss, + (int)format->Gloss, (int)format->Bloss, (int)format->Aloss); + logger->log("Shift: %02x, %02x, %02x, %02x", (int)format->Rshift, + (int)format->Gshift, (int)format->Bshift, (int)format->Ashift); + logger->log("Mask: %08x, %08x, %08x, %08x", format->Rmask, + format->Gmask, format->Bmask, format->Amask); + } +} + +int ImageHelper::useOpenGL() +{ +#ifdef USE_OPENGL + return mUseOpenGL; +#else + return 0; +#endif +} |