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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 "atari-screen.h"
#include <mint/falcon.h>
#include "atari-graphics.h"
#include "atari-graphics-superblitter.h"
#include "backends/platform/atari/atari-debug.h"
Screen::Screen(AtariGraphicsManager *manager, int width, int height, const Graphics::PixelFormat &format, const Palette *palette_)
: _manager(manager)
, cursor(manager, this, width / 2, height / 2)
, palette(palette_) {
const AtariGraphicsManager::AtariMemAlloc &allocFunc = _manager->getStRamAllocFunc();
surf.init(
width + (_manager->_tt ? 0 : 2 * MAX_HZ_SHAKE),
height + 2 * MAX_V_SHAKE,
(width + (_manager->_tt ? 0 : 2 * MAX_HZ_SHAKE)) * _manager->getBitsPerPixel(format) / 8,
nullptr,
format);
void *pixelsUnaligned = allocFunc(sizeof(uintptr) + (surf.h * surf.pitch) + ALIGN - 1);
if (!pixelsUnaligned) {
error("Failed to allocate memory in ST RAM");
}
// TODO: use mspace_calloc similar as what we do with SuperVidel
surf.setPixels((void *)(((uintptr)pixelsUnaligned + sizeof(uintptr) + ALIGN - 1) & (-ALIGN)));
// store the unaligned pointer for later release
*((uintptr *)surf.getPixels() - 1) = (uintptr)pixelsUnaligned;
memset(surf.getPixels(), 0, surf.h * surf.pitch);
_offsettedSurf.init(
width, height, surf.pitch,
surf.getBasePtr((surf.w - width) / 2, (surf.h - height) / 2),
surf.format);
}
Screen::~Screen() {
const AtariGraphicsManager::AtariMemFree &freeFunc = _manager->getStRamFreeFunc();
freeFunc((void *)*((uintptr *)surf.getPixels() - 1));
}
void Screen::reset(int width, int height, int bitsPerPixel, const Graphics::Surface &boundingSurf, int xOffset, bool resetCursorPosition) {
_xOffset = xOffset;
clearDirtyRects();
cursor.reset(&boundingSurf, xOffset);
if (resetCursorPosition)
cursor.setPosition(boundingSurf.w / 2, boundingSurf.h / 2);
rez = -1;
mode = -1;
// erase old screen
_offsettedSurf.fillRect(Common::Rect(_offsettedSurf.w, _offsettedSurf.h), 0);
if (_manager->_tt) {
if (width <= 320 && height <= 240) {
surf.w = 320;
surf.h = 240 + 2 * MAX_V_SHAKE;
surf.pitch = 2 * surf.w * bitsPerPixel / 8;
rez = kRezValueTTLow;
} else {
surf.w = 640;
surf.h = 480 + 2 * MAX_V_SHAKE;
surf.pitch = surf.w * bitsPerPixel / 8;
rez = kRezValueTTMid;
}
} else {
mode = VsetMode(VM_INQUIRE) & PAL;
if (_manager->_vgaMonitor) {
mode |= VGA | (bitsPerPixel == 4 ? BPS4 : (hasSuperVidel() ? BPS8C : BPS8));
if (width <= 320 && height <= 240) {
surf.w = 320;
surf.h = 240;
mode |= VERTFLAG | COL40;
} else {
surf.w = 640;
surf.h = 480;
mode |= COL80;
}
} else {
mode |= TV | (bitsPerPixel == 4 ? BPS4 : BPS8);
if (width <= 320 && height <= 200) {
surf.w = 320;
surf.h = 200;
mode |= COL40;
} else if (width <= 320*1.2 && height <= 200*1.2) {
surf.w = 320*1.2;
surf.h = 200*1.2;
mode |= OVERSCAN | COL40;
} else if (width <= 640 && height <= 400) {
surf.w = 640;
surf.h = 400;
mode |= VERTFLAG | COL80;
} else {
surf.w = 640*1.2;
surf.h = 400*1.2;
mode |= VERTFLAG | OVERSCAN | COL80;
}
}
surf.w += 2 * MAX_HZ_SHAKE;
surf.h += 2 * MAX_V_SHAKE;
surf.pitch = surf.w * bitsPerPixel / 8;
}
_offsettedSurf.init(
width, height, surf.pitch,
surf.getBasePtr((surf.w - width) / 2, (surf.h - height) / 2),
surf.format);
}
void Screen::addDirtyRect(const Graphics::Surface &srcSurface, int x, int y, int w, int h, bool directRendering) {
if (fullRedraw)
return;
if ((w == srcSurface.w && h == srcSurface.h)
|| dirtyRects.size() == 128) { // 320x200 can hold at most 250 16x16 rectangles
//atari_debug("addDirtyRect[%d]: purge %d x %d", (int)dirtyRects.size(), srcSurface.w, srcSurface.h);
dirtyRects.clear();
// don't use x/y/w/h, the 2nd expression may be true
// also, it's ok if e.g. w = 630 gets aligned to w = 640, nothing is drawn in 630~639
dirtyRects.insert(_manager->alignRect(_xOffset, 0, _xOffset + srcSurface.w, srcSurface.h));
cursor.reset(&srcSurface, _xOffset);
fullRedraw = true;
} else {
const Common::Rect alignedRect = _manager->alignRect(x + _xOffset, y, x + _xOffset + w, y + h);
dirtyRects.insert(alignedRect);
// Check whether the cursor background intersects the dirty rect. Has to be done here,
// before the actual drawing (especially in case of direct rendering). There's one more
// check in AtariGraphicsManager::updateScreenInternal for the case when there are no
// dirty rectangles but the cursor itself has changed.
const Common::Rect cursorBackgroundRect = cursor.flushBackground(alignedRect, directRendering);
if (!cursorBackgroundRect.isEmpty()) {
dirtyRects.insert(cursorBackgroundRect);
}
}
}
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