93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "engines/stark/visual/flashingimage.h"
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#include "common/random.h"
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#include "graphics/surface.h"
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#include "engines/stark/gfx/driver.h"
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#include "engines/stark/gfx/surfacerenderer.h"
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#include "engines/stark/gfx/bitmap.h"
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#include "engines/stark/services/global.h"
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#include "engines/stark/services/services.h"
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#include "engines/stark/services/settings.h"
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namespace Stark {
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const float VisualFlashingImage::_fadeValueMax = 0.55f;
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VisualFlashingImage::VisualFlashingImage(Gfx::Driver *gfx) :
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Visual(TYPE),
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_gfx(gfx),
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_bitmap(nullptr),
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_fadeLevelIncreasing(true),
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_fadeLevel(0),
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_flashingTimeRemaining(150 * 33),
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_originalWidth(0),
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_originalHeight(0) {
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_surfaceRenderer = _gfx->createSurfaceRenderer();
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}
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VisualFlashingImage::~VisualFlashingImage() {
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delete _bitmap;
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delete _surfaceRenderer;
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}
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void VisualFlashingImage::initFromSurface(const Graphics::Surface *surface, uint originalWidth, uint originalHeight) {
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assert(!_bitmap);
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_originalWidth = originalWidth;
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_originalHeight = originalHeight;
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_bitmap = _gfx->createBitmap(surface);
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_bitmap->setSamplingFilter(StarkSettings->getImageSamplingFilter());
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}
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void VisualFlashingImage::updateFadeLevel() {
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uint millisecondsPerGameloop = StarkGlobal->getMillisecondsPerGameloop();
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if (_flashingTimeRemaining > 0) {
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_flashingTimeRemaining -= millisecondsPerGameloop;
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if (_fadeLevelIncreasing) {
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_fadeLevel += 0.0022f * millisecondsPerGameloop;
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}
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else {
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_fadeLevel -= 0.0022f * millisecondsPerGameloop;
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}
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if (ABS(_fadeLevel) >= _fadeValueMax) {
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_fadeLevelIncreasing = !_fadeLevelIncreasing;
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_fadeLevel = CLIP(_fadeLevel, -_fadeValueMax, _fadeValueMax);
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}
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} else {
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_fadeLevel = 0;
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}
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}
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void VisualFlashingImage::render(const Common::Point &position) {
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updateFadeLevel();
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_surfaceRenderer->setFadeLevel(_fadeLevel);
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_surfaceRenderer->render(_bitmap, position, _originalWidth, _originalHeight);
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}
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} // End of namespace Stark
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