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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 (at your option) 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
/*
* This code is based on Broken Sword 2.5 engine
*
* Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
*
* Licensed under GNU GPL v2
*
*/
// -----------------------------------------------------------------------------
// INCLUDES
// -----------------------------------------------------------------------------
#include "sword25/package/packagemanager.h"
#include "sword25/gfx/image/imageloader.h"
#include "sword25/gfx/opengl/openglgfx.h"
#include "sword25/gfx/opengl/glimage.h"
#include "common/system.h"
namespace Sword25 {
#define BS_LOG_PREFIX "GLIMAGE"
// -----------------------------------------------------------------------------
// CONSTRUCTION / DESTRUCTION
// -----------------------------------------------------------------------------
GLImage::GLImage(const Common::String &filename, bool &result) :
_data(0),
_width(0),
_height(0) {
result = false;
PackageManager *pPackage = static_cast<PackageManager *>(Kernel::GetInstance()->GetService("package"));
BS_ASSERT(pPackage);
_backSurface = (static_cast<GraphicEngine *>(Kernel::GetInstance()->GetService("gfx")))->getSurface();
// Datei laden
byte *pFileData;
uint fileSize;
if (!(pFileData = (byte *)pPackage->GetFile(filename, &fileSize))) {
BS_LOG_ERRORLN("File \"%s\" could not be loaded.", filename.c_str());
return;
}
// Bildeigenschaften bestimmen
GraphicEngine::COLOR_FORMATS colorFormat;
int pitch;
if (!ImageLoader::ExtractImageProperties(pFileData, fileSize, colorFormat, _width, _height)) {
BS_LOG_ERRORLN("Could not read image properties.");
delete[] pFileData;
return;
}
// Das Bild dekomprimieren
if (!ImageLoader::LoadImage(pFileData, fileSize, GraphicEngine::CF_ARGB32, _data, _width, _height, pitch)) {
BS_LOG_ERRORLN("Could not decode image.");
delete[] pFileData;
return;
}
// Dateidaten freigeben
delete[] pFileData;
_doCleanup = true;
result = true;
return;
}
// -----------------------------------------------------------------------------
GLImage::GLImage(uint width, uint height, bool &result) :
_width(width),
_height(height) {
_data = new byte[width * height * 4];
Common::set_to(_data, &_data[width * height * 4], 0);
_backSurface = (static_cast<GraphicEngine *>(Kernel::GetInstance()->GetService("gfx")))->getSurface();
_doCleanup = true;
result = true;
return;
}
GLImage::GLImage() : _width(0), _height(0), _data(0) {
_backSurface = (static_cast<GraphicEngine *>(Kernel::GetInstance()->GetService("gfx")))->getSurface();
_doCleanup = false;
return;
}
// -----------------------------------------------------------------------------
GLImage::~GLImage() {
if (_doCleanup)
delete[] _data;
}
// -----------------------------------------------------------------------------
bool GLImage::fill(const Common::Rect *pFillRect, uint color) {
BS_LOG_ERRORLN("Fill() is not supported.");
return false;
}
// -----------------------------------------------------------------------------
bool GLImage::setContent(const byte *pixeldata, uint size, uint offset, uint stride) {
// �berpr�fen, ob PixelData ausreichend viele Pixel enth�lt um ein Bild der Gr��e Width * Height zu erzeugen
if (size < static_cast<uint>(_width * _height * 4)) {
BS_LOG_ERRORLN("PixelData vector is too small to define a 32 bit %dx%d image.", _width, _height);
return false;
}
const byte *in = &pixeldata[offset];
byte *out = _data;
for (int i = 0; i < _height; i++) {
memcpy(out, in, _width * 4);
out += _width * 4;
in += stride;
}
return true;
}
void GLImage::replaceContent(byte *pixeldata, int width, int height) {
_width = width;
_height = height;
_data = pixeldata;
}
// -----------------------------------------------------------------------------
uint GLImage::getPixel(int x, int y) {
BS_LOG_ERRORLN("GetPixel() is not supported. Returning black.");
return 0;
}
// -----------------------------------------------------------------------------
bool GLImage::blit(int posX, int posY, int flipping, Common::Rect *pPartRect, uint color, int width, int height) {
// Create an encapsulating surface for the data
Graphics::Surface srcImage;
srcImage.bytesPerPixel = 4;
srcImage.pitch = _width * 4;
srcImage.w = _width;
srcImage.h = _height;
srcImage.pixels = _data;
if (pPartRect) {
srcImage.pixels = &_data[pPartRect->top * srcImage.pitch + pPartRect->left * 4];
srcImage.w = pPartRect->right - pPartRect->left;
srcImage.h = pPartRect->bottom - pPartRect->top;
debug(6, "Blit(%d, %d, %d, [%d, %d, %d, %d], %08x, %d, %d)", posX, posY, flipping,
pPartRect->left, pPartRect->top, pPartRect->width(), pPartRect->height(), color, width, height);
} else {
debug(6, "Blit(%d, %d, %d, [%d, %d, %d, %d], %08x, %d, %d)", posX, posY, flipping, 0, 0,
srcImage.w, srcImage.h, color, width, height);
}
if (width == -1)
width = srcImage.w;
if (height == -1)
height = srcImage.h;
#ifdef SCALING_TESTING
// Hardcode scaling to 66% to test scaling
width = width * 2 / 3;
height = height * 2 / 3;
#endif
Graphics::Surface *img;
Graphics::Surface *imgScaled = NULL;
byte *savedPixels = NULL;
if ((width != srcImage.w) || (height != srcImage.h)) {
// Scale the image
img = imgScaled = scale(srcImage, width, height);
savedPixels = (byte *)img->pixels;
} else {
img = &srcImage;
}
int ca = (color >> 24) & 0xff;
int cr = (color >> 16) & 0xff;
int cg = (color >> 8) & 0xff;
int cb = (color >> 0) & 0xff;
if (ca != 255) {
cr = cr * ca >> 8;
cg = cg * ca >> 8;
cb = cb * ca >> 8;
}
// Handle off-screen clipping
if (posY < 0) {
img->h -= -posY;
img->pixels = (byte *)img->pixels + img->pitch * -posY;
posY = 0;
}
if (posX < 0) {
img->w -= -posX;
img->pixels = (byte *)img->pixels + (-posX * 4);
posX = 0;
}
img->w = CLIP((int)img->w, 0, (int)MAX((int)_backSurface->w - posX, 0));
img->h = CLIP((int)img->h, 0, (int)MAX((int)_backSurface->h - posY, 0));
if ((ca != 0) && (img->w > 0) && (img->h > 0)) {
int xp = 0, yp = 0;
int inStep = 4;
int inoStep = img->pitch;
if (flipping & Image::FLIP_V) {
inStep = -inStep;
xp = img->w - 1;
}
if (flipping & Image::FLIP_H) {
inoStep = -inoStep;
yp = img->h - 1;
}
byte *ino = (byte *)img->getBasePtr(xp, yp);
byte *outo = (byte *)_backSurface->getBasePtr(posX, posY);
byte *in, *out;
for (int i = 0; i < img->h; i++) {
out = outo;
in = ino;
for (int j = 0; j < img->w; j++) {
int r = in[0];
int g = in[1];
int b = in[2];
int a = in[3];
in += inStep;
switch (a) {
case 0: // Full transparency
out += 4;
break;
case 255: // Full opacity
if (cr != 255)
*out++ = (r * cr) >> 8;
else
*out++ = r;
if (cg != 255)
*out++ = (g * cg) >> 8;
else
*out++ = g;
if (cb != 255)
*out++ = (b * cb) >> 8;
else
*out++ = b;
*out++ = a;
break;
default: // alpha blending
if (cr != 255)
*out += ((r - *out) * a * cr) >> 16;
else
*out += ((r - *out) * a) >> 8;
out++;
if (cg != 255)
*out += ((g - *out) * a * cg) >> 16;
else
*out += ((g - *out) * a) >> 8;
out++;
if (cb != 255)
*out += ((b - *out) * a * cb) >> 16;
else
*out += ((b - *out) * a) >> 8;
out++;
*out = 255;
out++;
}
}
outo += _backSurface->pitch;
ino += inoStep;
}
g_system->copyRectToScreen((byte *)_backSurface->getBasePtr(posX, posY), _backSurface->pitch, posX, posY,
img->w, img->h);
}
if (imgScaled) {
imgScaled->pixels = savedPixels;
imgScaled->free();
delete imgScaled;
}
return true;
}
/**
* Scales a passed surface, creating a new surface with the result
* @param srcImage Source image to scale
* @param scaleFactor Scale amount. Must be between 0 and 1.0 (but not zero)
* @remarks Caller is responsible for freeing the returned surface
*/
Graphics::Surface *GLImage::scale(const Graphics::Surface &srcImage, int xSize, int ySize) {
Graphics::Surface *s = new Graphics::Surface();
s->create(xSize, ySize, srcImage.bytesPerPixel);
int *horizUsage = scaleLine(xSize, srcImage.w);
int *vertUsage = scaleLine(ySize, srcImage.h);
// Loop to create scaled version
for (int yp = 0; yp < ySize; ++yp) {
byte *srcP = (byte *)srcImage.getBasePtr(0, vertUsage[yp]);
byte *destP = (byte *)s->getBasePtr(0, yp);
for (int xp = 0; xp < xSize; ++xp) {
byte *tempSrcP = srcP + (horizUsage[xp] * srcImage.bytesPerPixel);
for (int byteCtr = 0; byteCtr < srcImage.bytesPerPixel; ++byteCtr) {
*destP++ = *tempSrcP++;
}
}
}
// Delete arrays and return surface
delete[] horizUsage;
delete[] vertUsage;
return s;
}
/**
* Returns an array indicating which pixels of a source image horizontally or vertically get
* included in a scaled image
*/
int *GLImage::scaleLine(int size, int srcSize) {
int scale = 100 * size / srcSize;
assert(scale > 0);
int *v = new int[size];
Common::set_to(v, &v[size], 0);
int distCtr = 0;
int *destP = v;
for (int distIndex = 0; distIndex < srcSize; ++distIndex) {
distCtr += scale;
while (distCtr >= 100) {
assert(destP < &v[size]);
*destP++ = distIndex;
distCtr -= 100;
}
}
return v;
}
} // End of namespace Sword25
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