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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/image.cpp
parentb2c1c301b1e39fbbbb5bde3d4d55d14a9873b51f (diff)
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Move static methods from Image class to ImageHelper class.
Remove SDL merge method. It was very slow and unused.
Diffstat (limited to 'src/resources/image.cpp')
-rw-r--r--src/resources/image.cpp642
1 files changed, 8 insertions, 634 deletions
diff --git a/src/resources/image.cpp b/src/resources/image.cpp
index 85643c8df..0e0937ce6 100644
--- a/src/resources/image.cpp
+++ b/src/resources/image.cpp
@@ -36,21 +36,13 @@
#include "utils/stringutils.h"
+#include "resources/imagehelper.h"
+
#include <SDL_image.h>
#include <SDL_rotozoom.h>
#include "debug.h"
-#ifdef USE_OPENGL
-int Image::mUseOpenGL = 0;
-int Image::mTextureType = 0;
-int Image::mInternalTextureType = GL_RGBA8;
-int Image::mTextureSize = 0;
-bool Image::mBlur = true;
-#endif
-bool Image::mEnableAlphaCache = false;
-bool Image::mEnableAlpha = true;
-
Image::Image(SDL_Surface *image, bool hasAlphaChannel0, Uint8 *alphaChannel):
mAlpha(1.0f),
mHasAlphaChannel(hasAlphaChannel0),
@@ -63,7 +55,7 @@ Image::Image(SDL_Surface *image, bool hasAlphaChannel0, Uint8 *alphaChannel):
mGLImage = 0;
#endif
- mUseAlphaCache = Image::mEnableAlphaCache;
+ mUseAlphaCache = ImageHelper::mEnableAlphaCache;
mBounds.x = 0;
mBounds.y = 0;
@@ -123,214 +115,6 @@ Image::~Image()
unload();
}
-Resource *Image::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 *Image::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 *Image::load(SDL_Surface *tmpImage)
-{
-#ifdef USE_OPENGL
- if (mUseOpenGL)
- return _GLload(tmpImage);
-#endif
- return _SDLload(tmpImage);
-}
-
-Image *Image::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;
-}
-
void Image::SDLCleanCache()
{
ResourceManager *resman = ResourceManager::getInstance();
@@ -374,22 +158,13 @@ void Image::unload()
#endif
}
-int Image::useOpenGL() const
-{
-#ifdef USE_OPENGL
- return mUseOpenGL;
-#else
- return 0;
-#endif
-}
-
bool Image::hasAlphaChannel()
{
if (mLoaded)
return mHasAlphaChannel;
#ifdef USE_OPENGL
- if (mUseOpenGL)
+ if (ImageHelper::mUseOpenGL)
return true;
#endif
@@ -406,7 +181,7 @@ SDL_Surface *Image::getByAlpha(float alpha)
void Image::setAlpha(float alpha)
{
- if (mAlpha == alpha || !mEnableAlpha)
+ if (mAlpha == alpha || !ImageHelper::mEnableAlpha)
return;
if (alpha < 0.0f || alpha > 1.0f)
@@ -456,7 +231,7 @@ void Image::setAlpha(float alpha)
}
else
{
- mSDLSurface = Image::SDLDuplicateSurface(mSDLSurface);
+ mSDLSurface = ImageHelper::SDLDuplicateSurface(mSDLSurface);
}
// logger->log("miss");
}
@@ -510,97 +285,6 @@ void Image::setAlpha(float alpha)
}
}
-Image* Image::SDLmerge(Image *image, int x, int y)
-{
- if (!mSDLSurface || !image || !image->mSDLSurface)
- return nullptr;
-
- SDL_Surface* surface = new SDL_Surface(*(image->mSDLSurface));
-
- Uint32 surface_pix, cur_pix;
- Uint8 r, g, b, a, p_r, p_g, p_b, p_a;
- double f_a, f_ca, f_pa;
- SDL_PixelFormat *current_fmt = mSDLSurface->format;
- SDL_PixelFormat *surface_fmt = surface->format;
- int current_offset, surface_offset;
- int offset_x, offset_y;
-
- SDL_LockSurface(surface);
- SDL_LockSurface(mSDLSurface);
-
- const int x0 = (y * mBounds.w) + x;
- const int maxX = std::min(image->mBounds.w,
- static_cast<Uint16>(mBounds.w - x));
- const int maxY = std::min(image->mBounds.w,
- static_cast<Uint16>(mBounds.h - y));
-
- // for each pixel lines of a source image
- for (offset_x = ((x > 0) ? 0 : -x); offset_x < maxX; offset_x++)
- {
- const int x1 = x0 + offset_x;
- for (offset_y = ((y > 0) ? 0 : -y); offset_y < maxY; offset_y++)
- {
- // Computing offset on both images
- current_offset = (offset_y * mBounds.w) + x1;
- surface_offset = offset_y * surface->w + offset_x;
-
- // Retrieving a pixel to merge
- surface_pix = (static_cast<Uint32*>(
- surface->pixels))[surface_offset];
- cur_pix = (static_cast<Uint32*>(
- mSDLSurface->pixels))[current_offset];
-
- // Retreiving each channel of the pixel using pixel format
- r = static_cast<Uint8>(((surface_pix & surface_fmt->Rmask) >>
- surface_fmt->Rshift) << surface_fmt->Rloss);
- g = static_cast<Uint8>(((surface_pix & surface_fmt->Gmask) >>
- surface_fmt->Gshift) << surface_fmt->Gloss);
- b = static_cast<Uint8>(((surface_pix & surface_fmt->Bmask) >>
- surface_fmt->Bshift) << surface_fmt->Bloss);
- a = static_cast<Uint8>(((surface_pix & surface_fmt->Amask) >>
- surface_fmt->Ashift) << surface_fmt->Aloss);
-
- // Retreiving previous alpha value
- p_a = static_cast<Uint8>(((cur_pix & current_fmt->Amask) >>
- current_fmt->Ashift) << current_fmt->Aloss);
-
- // new pixel with no alpha or nothing on previous pixel
- if (a == SDL_ALPHA_OPAQUE || (p_a == 0 && a > 0))
- {
- (static_cast<Uint32 *>(surface->pixels))[current_offset] =
- SDL_MapRGBA(current_fmt, r, g, b, a);
- }
- else if (a > 0)
- { // alpha is lower => merge color with previous value
- f_a = static_cast<double>(a) / 255.0;
- f_ca = 1.0 - f_a;
- f_pa = static_cast<double>(p_a) / 255.0;
- p_r = static_cast<Uint8>(((cur_pix & current_fmt->Rmask) >>
- current_fmt->Rshift) << current_fmt->Rloss);
- p_g = static_cast<Uint8>(((cur_pix & current_fmt->Gmask) >>
- current_fmt->Gshift) << current_fmt->Gloss);
- p_b = static_cast<Uint8>(((cur_pix & current_fmt->Bmask) >>
- current_fmt->Bshift) << current_fmt->Bloss);
- r = static_cast<Uint8>(static_cast<double>(p_r) * f_ca
- * f_pa + static_cast<double>(r) * f_a);
- g = static_cast<Uint8>(static_cast<double>(p_g) * f_ca
- * f_pa + static_cast<double>(g) * f_a);
- b = static_cast<Uint8>(static_cast<double>(p_b) * f_ca
- * f_pa + static_cast<double>(b) * f_a);
- a = (a > p_a ? a : p_a);
- (static_cast<Uint32 *>(surface->pixels))[current_offset] =
- SDL_MapRGBA(current_fmt, r, g, b, a);
- }
- }
- }
- SDL_UnlockSurface(surface);
- SDL_UnlockSurface(mSDLSurface);
-
- Image *newImage = new Image(surface);
-
- return newImage;
-}
-
Image* Image::SDLgetScaledImage(int width, int height)
{
// No scaling on incorrect new values.
@@ -625,312 +309,18 @@ Image* Image::SDLgetScaledImage(int width, int height)
// and about freeing the given SDL_surface*.
if (scaledSurface)
{
- scaledImage = load(scaledSurface);
+ scaledImage = ImageHelper::load(scaledSurface);
SDL_FreeSurface(scaledSurface);
}
}
return scaledImage;
}
-SDL_Surface* Image::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* Image::SDLDuplicateSurface(SDL_Surface* tmpImage)
-{
- if (!tmpImage || !tmpImage->format)
- return nullptr;
-
- return SDL_ConvertSurface(tmpImage, tmpImage->format, SDL_SWSURFACE);
-}
-
-Image *Image::_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
-Image *Image::_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 Image::setLoadAsOpenGL(int useOpenGL)
-{
- Image::mUseOpenGL = useOpenGL;
-}
-
-int Image::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;
-}
-#endif
-
Image *Image::getSubImage(int x, int y, int width, int height)
{
// Create a new clipped sub-image
#ifdef USE_OPENGL
- if (mUseOpenGL)
+ if (ImageHelper::mUseOpenGL)
{
return new SubImage(this, mGLImage, x, y, width, height,
mTexWidth, mTexHeight);
@@ -946,22 +336,6 @@ void Image::SDLTerminateAlphaCache()
mUseAlphaCache = false;
}
-void Image::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);
- }
-}
-
//============================================================================
// SubImage Class
//============================================================================