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https://github.com/libretro/scummvm.git
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123 lines
3.5 KiB
C++
123 lines
3.5 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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#include "teenagent/surface.h"
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#include "teenagent/pack.h"
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#include "common/stream.h"
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#include "common/debug.h"
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namespace TeenAgent {
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Surface::Surface() : x(0), y(0) {
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}
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Surface::~Surface() {
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free();
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}
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void Surface::load(Common::SeekableReadStream &stream, Type type) {
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//debug(0, "load()");
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free();
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x = y = 0;
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uint16 w_ = stream.readUint16LE();
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uint16 h_ = stream.readUint16LE();
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if (type != kTypeLan) {
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uint16 pos = stream.readUint16LE();
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x = pos % 320;
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y = pos / 320;
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}
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//debug(0, "declared info: %ux%u (%04xx%04x) -> %u,%u", w_, h_, w_, h_, x, y);
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if (stream.eos() || w_ == 0)
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return;
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if (w_ * h_ > stream.size()) {
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debug(0, "invalid surface %ux%u -> %u,%u", w_, h_, x, y);
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return;
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}
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//debug(0, "creating surface %ux%u -> %u,%u", w_, h_, x, y);
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create(w_, h_, Graphics::PixelFormat::createFormatCLUT8());
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stream.read(pixels, w_ * h_);
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}
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Common::Rect Surface::render(Graphics::Surface *surface, int dx, int dy, bool mirror, Common::Rect src_rect, uint zoom) const {
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if (src_rect.isEmpty()) {
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src_rect = Common::Rect(0, 0, w, h);
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}
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Common::Rect dst_rect(x + dx, y + dy, x + dx + zoom * src_rect.width() / 256, y + dy + zoom * src_rect.height() / 256);
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if (dst_rect.left < 0) {
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src_rect.left = -dst_rect.left;
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dst_rect.left = 0;
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}
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if (dst_rect.right > surface->w) {
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src_rect.right -= dst_rect.right - surface->w;
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dst_rect.right = surface->w;
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}
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if (dst_rect.top < 0) {
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src_rect.top -= dst_rect.top;
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dst_rect.top = 0;
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}
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if (dst_rect.bottom > surface->h) {
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src_rect.bottom -= dst_rect.bottom - surface->h;
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dst_rect.bottom = surface->h;
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}
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if (src_rect.isEmpty() || dst_rect.isEmpty())
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return Common::Rect();
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if (zoom == 256) {
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const byte *src = (const byte *)getBasePtr(0, src_rect.top);
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byte *dst_base = (byte *)surface->getBasePtr(dst_rect.left, dst_rect.top);
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for (int i = src_rect.top; i < src_rect.bottom; ++i) {
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byte *dst = dst_base;
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for (int j = src_rect.left; j < src_rect.right; ++j) {
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byte p = src[(mirror ? w - j - 1 : j)];
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if (p != 0xff)
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*dst++ = p;
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else
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++dst;
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}
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dst_base += surface->pitch;
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src += pitch;
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}
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} else {
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byte *dst = (byte *)surface->getBasePtr(dst_rect.left, dst_rect.top);
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for (int i = 0; i < dst_rect.height(); ++i) {
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for (int j = 0; j < dst_rect.width(); ++j) {
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int px = j * 256 / zoom;
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const byte *src = (const byte *)getBasePtr(src_rect.left + (mirror ? w - px - 1 : px), src_rect.top + i * 256 / zoom);
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byte p = *src;
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if (p != 0xff)
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dst[j] = p;
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}
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dst += surface->pitch;
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}
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}
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return dst_rect;
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}
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} // End of namespace TeenAgent
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