Split ImageHelper to ImageHelper, SDLImageHelper, OpenGLImageHelper.

1 files changed, 278 insertions, 0 deletions

diff --git a/src/resources/openglimagehelper.cpp b/src/resources/openglimagehelper.cpp
new file mode 100644
index 000000000..1de5305c4
--- /dev/null
+++ b/src/resources/openglimagehelper.cpp
@@ -0,0 +1,278 @@
+/*
+ *  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/openglimagehelper.h"
+
+#ifdef USE_OPENGL
+
+#include "resources/dye.h"
+#include "resources/resourcemanager.h"
+
+#include "openglgraphics.h"
+#include "opengl1graphics.h"
+
+#include "client.h"
+#include "logger.h"
+
+#include "utils/stringutils.h"
+
+#include "resources/image.h"
+
+#include <SDL_image.h>
+#include <SDL_rotozoom.h>
+
+#include "debug.h"
+
+int OpenGLImageHelper::mTextureType = 0;
+int OpenGLImageHelper::mInternalTextureType = GL_RGBA8;
+int OpenGLImageHelper::mTextureSize = 0;
+bool OpenGLImageHelper::mBlur = true;
+int OpenGLImageHelper::mUseOpenGL = 0;
+
+Resource *OpenGLImageHelper::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 = 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);
+        }
+    }
+
+    Image *image = load(surf);
+    SDL_FreeSurface(surf);
+    return image;
+}
+
+Image *OpenGLImageHelper::load(SDL_Surface *tmpImage)
+{
+    return _GLload(tmpImage);
+}
+
+Image *OpenGLImageHelper::createTextSurface(SDL_Surface *tmpImage, float alpha)
+{
+    if (!tmpImage)
+        return nullptr;
+
+    Image *img = _GLload(tmpImage);
+    if (img)
+        img->setAlpha(alpha);
+    return img;
+}
+
+int OpenGLImageHelper::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 *OpenGLImageHelper::_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 OpenGLImageHelper::setLoadAsOpenGL(int useOpenGL)
+{
+    OpenGLImageHelper::mUseOpenGL = useOpenGL;
+}
+
+int OpenGLImageHelper::useOpenGL()
+{
+    return mUseOpenGL;
+}
+#endif