mirror of
https://github.com/libretro/scummvm.git
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285 lines
8.3 KiB
C++
285 lines
8.3 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
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "sherlock/surface.h"
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#include "sherlock/sherlock.h"
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#include "sherlock/resources.h"
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#include "common/system.h"
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#include "graphics/palette.h"
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namespace Sherlock {
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Surface::Surface(uint16 width, uint16 height, Common::Platform platform) : Fonts(), _freePixels(true) {
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create(width, height, platform);
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}
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Surface::Surface() : Fonts(), _freePixels(false) {
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}
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Surface::~Surface() {
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if (_freePixels)
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_surface.free();
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}
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void Surface::create(uint16 width, uint16 height, Common::Platform platform) {
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if (_freePixels)
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_surface.free();
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if (platform == Common::kPlatform3DO) {
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_surface.create(width, height, Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0));
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} else {
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_surface.create(width, height, Graphics::PixelFormat::createFormatCLUT8());
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}
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_freePixels = true;
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}
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void Surface::blitFrom(const Surface &src) {
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blitFrom(src, Common::Point(0, 0));
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}
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void Surface::blitFrom(const ImageFrame &src) {
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blitFrom(src._frame, Common::Point(0, 0));
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}
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void Surface::blitFrom(const Graphics::Surface &src) {
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blitFrom(src, Common::Point(0, 0));
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}
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void Surface::blitFrom(const Surface &src, const Common::Point &pt) {
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blitFrom(src, pt, Common::Rect(0, 0, src._surface.w, src._surface.h));
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}
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void Surface::blitFrom(const ImageFrame &src, const Common::Point &pt) {
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blitFrom(src._frame, pt, Common::Rect(0, 0, src._frame.w, src._frame.h));
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}
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void Surface::blitFrom(const Graphics::Surface &src, const Common::Point &pt) {
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blitFrom(src, pt, Common::Rect(0, 0, src.w, src.h));
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}
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void Surface::blitFrom(const Graphics::Surface &src, const Common::Point &pt, const Common::Rect &srcBounds) {
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Common::Rect srcRect = srcBounds;
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Common::Rect destRect(pt.x, pt.y, pt.x + srcRect.width(), pt.y + srcRect.height());
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if (srcRect.isValidRect() && clip(srcRect, destRect)) {
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// Surface is at least partially or completely on-screen
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addDirtyRect(destRect);
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_surface.copyRectToSurface(src, destRect.left, destRect.top, srcRect);
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}
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}
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void Surface::blitFrom(const ImageFrame &src, const Common::Point &pt, const Common::Rect &srcBounds) {
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blitFrom(src._frame, pt, srcBounds);
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}
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void Surface::blitFrom(const Surface &src, const Common::Point &pt, const Common::Rect &srcBounds) {
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blitFrom(src._surface, pt, srcBounds);
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}
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void Surface::transBlitFrom(const ImageFrame &src, const Common::Point &pt,
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bool flipped, int overrideColor, int scaleVal) {
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transBlitFrom(src._frame, pt + src._offset, flipped, overrideColor, scaleVal);
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}
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void Surface::transBlitFrom(const Surface &src, const Common::Point &pt,
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bool flipped, int overrideColor, int scaleVal) {
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const Graphics::Surface &s = src._surface;
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transBlitFrom(s, pt, flipped, overrideColor, scaleVal);
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}
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void Surface::transBlitFrom(const Graphics::Surface &src, const Common::Point &pt,
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bool flipped, int overrideColor, int scaleVal) {
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if (scaleVal == 256) {
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transBlitFromUnscaled(src, pt, flipped, overrideColor);
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return;
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}
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int scaleX = SCALE_THRESHOLD * SCALE_THRESHOLD / scaleVal;
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int scaleY = scaleX;
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int scaleXCtr = 0, scaleYCtr = 0;
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for (int yCtr = 0, destY = pt.y; yCtr < src.h && destY < this->h(); ++yCtr) {
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// Handle skipping lines if Y scaling
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scaleYCtr += scaleY;
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while (scaleYCtr >= SCALE_THRESHOLD && destY < this->h()) {
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scaleYCtr -= SCALE_THRESHOLD;
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if (destY >= 0) {
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// Handle drawing the line
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const byte *pSrc = (const byte *)src.getBasePtr(flipped ? src.w - 1 : 0, yCtr);
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byte *pDest = (byte *)getBasePtr(pt.x, destY);
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scaleXCtr = 0;
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for (int xCtr = 0, destX = pt.x; xCtr < src.w && destX < this->w(); ++xCtr) {
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// Handle horizontal scaling
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scaleXCtr += scaleX;
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while (scaleXCtr >= SCALE_THRESHOLD && destX < this->w()) {
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scaleXCtr -= SCALE_THRESHOLD;
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// Only handle on-screen pixels
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if (destX >= 0 && *pSrc != TRANSPARENCY)
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*pDest = *pSrc;
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++pDest;
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++destX;
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}
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pSrc = pSrc + (flipped ? -1 : 1);
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}
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}
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++destY;
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}
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}
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}
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void Surface::transBlitFromUnscaled(const Graphics::Surface &src, const Common::Point &pt,
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bool flipped, int overrideColor) {
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Common::Rect drawRect(0, 0, src.w, src.h);
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Common::Rect destRect(pt.x, pt.y, pt.x + src.w, pt.y + src.h);
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// Clip the display area to on-screen
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if (!clip(drawRect, destRect))
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// It's completely off-screen
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return;
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if (flipped)
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drawRect = Common::Rect(src.w - drawRect.right, src.h - drawRect.bottom,
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src.w - drawRect.left, src.h - drawRect.top);
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Common::Point destPt(destRect.left, destRect.top);
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addDirtyRect(Common::Rect(destPt.x, destPt.y, destPt.x + drawRect.width(),
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destPt.y + drawRect.height()));
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switch (src.format.bytesPerPixel) {
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case 1:
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// 8-bit palettized: Draw loop
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assert(_surface.format.bytesPerPixel == 1); // Security check
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for (int yp = 0; yp < drawRect.height(); ++yp) {
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const byte *srcP = (const byte *)src.getBasePtr(
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flipped ? drawRect.right - 1 : drawRect.left, drawRect.top + yp);
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byte *destP = (byte *)getBasePtr(destPt.x, destPt.y + yp);
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for (int xp = 0; xp < drawRect.width(); ++xp, ++destP) {
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if (*srcP != TRANSPARENCY)
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*destP = overrideColor ? overrideColor : *srcP;
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srcP = flipped ? srcP - 1 : srcP + 1;
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}
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}
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break;
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case 2:
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// 3DO 15-bit RGB565: Draw loop
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assert(_surface.format.bytesPerPixel == 2); // Security check
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for (int yp = 0; yp < drawRect.height(); ++yp) {
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const uint16 *srcP = (const uint16 *)src.getBasePtr(
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flipped ? drawRect.right - 1 : drawRect.left, drawRect.top + yp);
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uint16 *destP = (uint16 *)getBasePtr(destPt.x, destPt.y + yp);
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for (int xp = 0; xp < drawRect.width(); ++xp, ++destP) {
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if (*srcP) // RGB 0, 0, 0 -> transparent on 3DO
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*destP = *srcP; // overrideColor ? overrideColor : *srcP;
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srcP = flipped ? srcP - 1 : srcP + 1;
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}
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}
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break;
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default:
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error("Surface: unsupported bytesperpixel");
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break;
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}
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}
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void Surface::fillRect(int x1, int y1, int x2, int y2, byte color) {
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fillRect(Common::Rect(x1, y1, x2, y2), color);
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}
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void Surface::fillRect(const Common::Rect &r, byte color) {
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_surface.fillRect(r, color);
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addDirtyRect(r);
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}
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void Surface::fill(uint16 color) {
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_surface.fillRect(Common::Rect(_surface.w, _surface.h), color);
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}
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bool Surface::clip(Common::Rect &srcBounds, Common::Rect &destBounds) {
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if (destBounds.left >= _surface.w || destBounds.top >= _surface.h ||
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destBounds.right <= 0 || destBounds.bottom <= 0)
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return false;
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// Clip the bounds if necessary to fit on-screen
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if (destBounds.right > _surface.w) {
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srcBounds.right -= destBounds.right - _surface.w;
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destBounds.right = _surface.w;
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}
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if (destBounds.bottom > _surface.h) {
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srcBounds.bottom -= destBounds.bottom - _surface.h;
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destBounds.bottom = _surface.h;
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}
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if (destBounds.top < 0) {
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srcBounds.top += -destBounds.top;
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destBounds.top = 0;
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}
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if (destBounds.left < 0) {
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srcBounds.left += -destBounds.left;
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destBounds.left = 0;
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}
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return true;
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}
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void Surface::clear() {
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fillRect(Common::Rect(0, 0, _surface.w, _surface.h), 0);
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}
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void Surface::free() {
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if (_freePixels) {
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_surface.free();
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_freePixels = false;
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}
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}
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void Surface::setPixels(byte *pixels, int width, int height) {
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_surface.format = Graphics::PixelFormat::createFormatCLUT8();
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_surface.w = _surface.pitch = width;
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_surface.h = height;
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_surface.setPixels(pixels);
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}
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void Surface::writeString(const Common::String &str, const Common::Point &pt, byte overrideColor) {
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Fonts::writeString(this, str, pt, overrideColor);
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}
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void Surface::maskArea(const ImageFrame &src, const Common::Point &pt, int scrollX) {
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// TODO
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error("TODO: maskArea");
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}
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} // End of namespace Sherlock
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