summaryrefslogtreecommitdiff
path: root/src/resources/imagehelper.cpp
diff options
context:
space:
mode:
authorAndrei Karas <akaras@inbox.ru>2012-06-09 22:46:34 +0300
committerAndrei Karas <akaras@inbox.ru>2012-06-09 23:50:09 +0300
commitff11053f5f638749c3564c464dc41ebc474b4897 (patch)
tree8cf7ed8485528c7498612199c7ca56a6fd84f5e5 /src/resources/imagehelper.cpp
parentb2c1c301b1e39fbbbb5bde3d4d55d14a9873b51f (diff)
downloadmv-ff11053f5f638749c3564c464dc41ebc474b4897.tar.gz
mv-ff11053f5f638749c3564c464dc41ebc474b4897.tar.bz2
mv-ff11053f5f638749c3564c464dc41ebc474b4897.tar.xz
mv-ff11053f5f638749c3564c464dc41ebc474b4897.zip
Move static methods from Image class to ImageHelper class.
Remove SDL merge method. It was very slow and unused.
Diffstat (limited to 'src/resources/imagehelper.cpp')
-rw-r--r--src/resources/imagehelper.cpp582
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
+}