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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#include "engines/stark/visual/image.h"
#include "graphics/surface.h"
#include "image/png.h"
#include "engines/stark/formats/xmg.h"
#include "engines/stark/gfx/driver.h"
#include "engines/stark/gfx/surfacerenderer.h"
#include "engines/stark/gfx/bitmap.h"
#include "engines/stark/services/services.h"
#include "engines/stark/services/settings.h"
namespace Stark {
VisualImageXMG::VisualImageXMG(Gfx::Driver *gfx) :
Visual(TYPE),
_gfx(gfx),
_bitmap(nullptr),
_surface(nullptr),
_originalWidth(0),
_originalHeight(0) {
_surfaceRenderer = _gfx->createSurfaceRenderer();
}
VisualImageXMG::~VisualImageXMG() {
if (_surface) {
_surface->free();
}
delete _surface;
delete _bitmap;
delete _surfaceRenderer;
}
void VisualImageXMG::setHotSpot(const Common::Point &hotspot) {
_hotspot = hotspot;
}
void VisualImageXMG::load(Common::ReadStream *stream) {
assert(!_surface && !_bitmap);
// Decode the XMG
_surface = Formats::XMGDecoder::decode(stream);
_bitmap = _gfx->createBitmap(_surface);
_bitmap->setSamplingFilter(StarkSettings->getImageSamplingFilter());
_originalWidth = _surface->w;
_originalHeight = _surface->h;
}
void VisualImageXMG::readOriginalSize(Common::ReadStream *stream) {
Formats::XMGDecoder::readSize(stream, _originalWidth, _originalHeight);
}
bool VisualImageXMG::loadPNG(Common::SeekableReadStream *stream) {
assert(!_surface && !_bitmap);
// Decode the XMG
Image::PNGDecoder pngDecoder;
if (!pngDecoder.loadStream(*stream)) {
return false;
}
if (pngDecoder.getPalette()) {
warning("Indexed colors PNG images are not supported");
return false;
}
if (StarkSettings->shouldPreMultiplyReplacementPNGs()) {
// We can do alpha pre-multiplication when loading for
// convenience when testing modded graphics.
_surface = multiplyColorWithAlpha(pngDecoder.getSurface());
} else {
_surface = pngDecoder.getSurface()->convertTo(Gfx::Driver::getRGBAPixelFormat());
}
_bitmap = _gfx->createBitmap(_surface);
_bitmap->setSamplingFilter(StarkSettings->getImageSamplingFilter());
return true;
}
Graphics::Surface *VisualImageXMG::multiplyColorWithAlpha(const Graphics::Surface *source) {
assert(source->format == Gfx::Driver::getRGBAPixelFormat());
Graphics::Surface *dest = new Graphics::Surface();
dest->create(source->w, source->h, Gfx::Driver::getRGBAPixelFormat());
for (int y = 0; y < source->h; y++) {
const uint8 *src = (const uint8 *) source->getBasePtr(0, y);
uint8 *dst = (uint8 *) dest->getBasePtr(0, y);
for (int x = 0; x < source->w; x++) {
uint8 a, r, g, b;
r = *src++;
g = *src++;
b = *src++;
a = *src++;
if (a != 0xFF) {
r = (int) r * a / 255;
g = (int) g * a / 255;
b = (int) b * a / 255;
}
*dst++ = r;
*dst++ = g;
*dst++ = b;
*dst++ = a;
}
}
return dest;
}
void VisualImageXMG::render(const Common::Point &position, bool useOffset) {
render(position, useOffset, true);
}
void VisualImageXMG::render(const Common::Point &position, bool useOffset, bool unscaled) {
Common::Point drawPos = useOffset ? position - _hotspot : position;
if (!unscaled) {
uint width = _gfx->scaleWidthOriginalToCurrent(_originalWidth);
uint height = _gfx->scaleHeightOriginalToCurrent(_originalHeight);
_surfaceRenderer->render(_bitmap, drawPos, width, height);
} else {
_surfaceRenderer->render(_bitmap, drawPos, _originalWidth, _originalHeight);
}
}
void VisualImageXMG::setFadeLevel(float fadeLevel) {
_surfaceRenderer->setFadeLevel(fadeLevel);
}
bool VisualImageXMG::isPointSolid(const Common::Point &point) const {
assert(_surface);
if (_originalWidth < 32 || _originalHeight < 32) {
return true; // Small images are always solid
}
Common::Point scaledPoint;
scaledPoint.x = point.x * _surface->w / _originalWidth;
scaledPoint.y = point.y * _surface->h / _originalHeight;
scaledPoint.x = CLIP<uint16>(scaledPoint.x, 0, _surface->w);
scaledPoint.y = CLIP<uint16>(scaledPoint.y, 0, _surface->h);
// Maybe implement this method in some other way to avoid having to keep the surface in memory
const byte *ptr = (const byte *) _surface->getBasePtr(scaledPoint.x, scaledPoint.y);
return *(ptr + 3) == 0xFF;
}
int VisualImageXMG::getWidth() const {
return _originalWidth;
}
int VisualImageXMG::getHeight() const {
return _originalHeight;
}
const Graphics::Surface *VisualImageXMG::getSurface() const {
assert(_surface);
return _surface;
}
} // End of namespace Stark
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