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Diffstat (limited to 'engines/zvision/video.cpp')
| -rw-r--r-- | engines/zvision/video.cpp | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/engines/zvision/video.cpp b/engines/zvision/video.cpp new file mode 100644 index 0000000000..5230653ca3 --- /dev/null +++ b/engines/zvision/video.cpp @@ -0,0 +1,167 @@ +/* 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. + * + */ + +#include "common/scummsys.h" + +#include "common/system.h" +#include "video/video_decoder.h" +#include "engines/util.h" +#include "graphics/surface.h" + +#include "zvision/clock.h" +#include "zvision/render_manager.h" +#include "zvision/zvision.h" + + +namespace ZVision { + +// Taken/modified from SCI +void scaleBuffer(const byte *src, byte *dst, uint32 srcWidth, uint32 srcHeight, byte bytesPerPixel, uint scaleAmount) { + assert(bytesPerPixel == 1 || bytesPerPixel == 2); + + const uint32 newWidth = srcWidth * scaleAmount; + const uint32 pitch = newWidth * bytesPerPixel; + const byte *srcPtr = src; + + if (bytesPerPixel == 1) { + for (uint32 y = 0; y < srcHeight; y++) { + for (uint32 x = 0; x < srcWidth; x++) { + const byte color = *srcPtr++; + + for (uint i = 0; i < scaleAmount; i++) { + dst[i] = color; + dst[pitch + i] = color; + } + dst += scaleAmount; + } + dst += pitch; + } + } else if (bytesPerPixel == 2) { + for (uint32 y = 0; y < srcHeight; y++) { + for (uint32 x = 0; x < srcWidth; x++) { + const byte color = *srcPtr++; + const byte color2 = *srcPtr++; + + for (uint i = 0; i < scaleAmount; i++) { + uint index = i *2; + + dst[index] = color; + dst[index + 1] = color2; + dst[pitch + index] = color; + dst[pitch + index + 1] = color2; + } + dst += 2 * scaleAmount; + } + dst += pitch; + } + } +} + +void ZVision::playVideo(Video::VideoDecoder &videoDecoder, const Common::Rect &destRect, bool skippable) { + byte bytesPerPixel = videoDecoder.getPixelFormat().bytesPerPixel; + + uint16 origWidth = videoDecoder.getWidth(); + uint16 origHeight = videoDecoder.getHeight(); + + uint scale = 1; + // If destRect is empty, no specific scaling was requested. However, we may choose to do scaling anyway + if (destRect.isEmpty()) { + // Most videos are very small. Therefore we do a simple 2x scale + if (origWidth * 2 <= 640 && origHeight * 2 <= 480) { + scale = 2; + } + } else { + // Assume bilinear scaling. AKA calculate the scale from just the width. + // Also assume that the scaling is in integral intervals. AKA no 1.5x scaling + // TODO: Test ^these^ assumptions + scale = destRect.width() / origWidth; + + // TODO: Test if we need to support downscale. + } + + uint16 pitch = origWidth * bytesPerPixel; + + uint16 finalWidth = origWidth * scale; + uint16 finalHeight = origHeight * scale; + + byte *scaledVideoFrameBuffer; + if (scale != 1) { + scaledVideoFrameBuffer = new byte[finalWidth * finalHeight * bytesPerPixel]; + } + + uint16 x = ((WINDOW_WIDTH - finalWidth) / 2) + destRect.left; + uint16 y = ((WINDOW_HEIGHT - finalHeight) / 2) + destRect.top; + + _clock.stop(); + videoDecoder.start(); + + // Only continue while the video is still playing + while (!shouldQuit() && !videoDecoder.endOfVideo() && videoDecoder.isPlaying()) { + // Check for engine quit and video stop key presses + while (!videoDecoder.endOfVideo() && videoDecoder.isPlaying() && _eventMan->pollEvent(_event)) { + switch (_event.type) { + case Common::EVENT_KEYDOWN: + switch (_event.kbd.keycode) { + case Common::KEYCODE_q: + if (_event.kbd.hasFlags(Common::KBD_CTRL)) + quitGame(); + break; + case Common::KEYCODE_SPACE: + if (skippable) { + videoDecoder.stop(); + } + break; + default: + break; + } + default: + break; + } + } + + if (videoDecoder.needsUpdate()) { + const Graphics::Surface *frame = videoDecoder.decodeNextFrame(); + + if (frame) { + if (scale != 1) { + scaleBuffer((const byte *)frame->getPixels(), scaledVideoFrameBuffer, origWidth, origHeight, bytesPerPixel, scale); + _system->copyRectToScreen(scaledVideoFrameBuffer, pitch * 2, x, y, finalWidth, finalHeight); + } else { + _system->copyRectToScreen((const byte *)frame->getPixels(), pitch, x, y, finalWidth, finalHeight); + } + } + } + + // Always update the screen so the mouse continues to render + _system->updateScreen(); + + _system->delayMillis(videoDecoder.getTimeToNextFrame()); + } + + _clock.start(); + + if (scale != 1) { + delete[] scaledVideoFrameBuffer; + } +} + +} // End of namespace ZVision |