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authorAndrei Karas <akaras@inbox.ru>2012-06-10 16:54:18 +0300
committerAndrei Karas <akaras@inbox.ru>2012-06-10 17:25:07 +0300
commit3a28edfb7ac991ad70a7baf76f48218d9db89bcb (patch)
tree918e56537dd2f7c2ce94e97a297a83a55d6f6ea6 /src/resources/sdlimagehelper.cpp
parentf199b9ba7da47cb6f9aa95f843c0628621899aa9 (diff)
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Split ImageHelper to ImageHelper, SDLImageHelper, OpenGLImageHelper.
Diffstat (limited to 'src/resources/sdlimagehelper.cpp')
-rw-r--r--src/resources/sdlimagehelper.cpp280
1 files changed, 280 insertions, 0 deletions
diff --git a/src/resources/sdlimagehelper.cpp b/src/resources/sdlimagehelper.cpp
new file mode 100644
index 000000000..66e1bc823
--- /dev/null
+++ b/src/resources/sdlimagehelper.cpp
@@ -0,0 +1,280 @@
+/*
+ * 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/sdlimagehelper.h"
+
+#include "resources/dye.h"
+#include "resources/resourcemanager.h"
+
+#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"
+
+bool SDLImageHelper::mEnableAlphaCache = false;
+
+Resource *SDLImageHelper::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;
+ 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 *SDLImageHelper::load(SDL_Surface *tmpImage)
+{
+ return _SDLload(tmpImage);
+}
+
+Image *SDLImageHelper::createTextSurface(SDL_Surface *tmpImage, float alpha)
+{
+ if (!tmpImage)
+ return nullptr;
+
+ Image *img;
+
+ 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* SDLImageHelper::SDLDuplicateSurface(SDL_Surface* tmpImage)
+{
+ if (!tmpImage || !tmpImage->format)
+ return nullptr;
+
+ return SDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE);
+}
+
+Image *SDLImageHelper::_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);
+}
+
+int SDLImageHelper::useOpenGL()
+{
+ return 0;
+}