libretro/scummvm
1
0
Fork 0
mirror of https://github.com/libretro/scummvm.git synced 2024-12-27 04:07:05 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity
e78de67c54
scummvm/scumm/gfx.cpp
Eugene Sandulenko ff7e16dc2b o Added few targets 
* baseball2003 and Soccer2004 use Bink videos but just for intro movies and
    logos, so we may add them.
  * artdemo and readdemo also use Bink, but seems that additionally it uses
    them in cutscenes, but since there are just few of them, not like in
    full games, we may try to look at them too
  * SoccerMLS is (alsmost) working. It runs the intro, shows menu, lets
    to select from it but then fails at some Wiz stuff and there is no
    hotspots to choose. I think it may be related to overall HE99 problem
    with inventory where there is a bug preventing from item selection
o baseball2003 and Soccer2004 featured new LECF index block. Add stub for it
o SoccerMLS used kernelSetFunction 2001 in intro. add stub for it
o Alternative russian freddi3 uses badly formatted logo substitution in intro,
  so error() in default case in Gdi::drawBMAPBg() was replaced with warning().

svn-id: r16722
2005-02-02 00:32:02 +00:00

2698 lines
65 KiB
C++
Raw Blame History

/* ScummVM - Scumm Interpreter
* Copyright (C) 2001 Ludvig Strigeus
* Copyright (C) 2001-2005 The ScummVM project
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#include "stdafx.h"
#include "common/system.h"
#include "scumm/scumm.h"
#include "scumm/actor.h"
#include "scumm/charset.h"
#include "scumm/intern.h"
#include "scumm/resource.h"
#include "scumm/usage_bits.h"
#include "scumm/wiz_he.h"
#if defined(__PALM_OS__)
#include "init_arm.h"
#include "arm/native.h"
#include "arm/macros.h"
#endif
namespace Scumm {
static void blit(byte *dst, int dstPitch, const byte *src, int srcPitch, int w, int h);
static void fill(byte *dst, int dstPitch, byte color, int w, int h);
static void copy8Col(byte *dst, int dstPitch, const byte *src, int height);
static void clear8Col(byte *dst, int dstPitch, int height);
struct StripTable {
int offsets[160];
int run[160];
int color[160];
int zoffsets[120]; // FIXME: Why only 120 here?
int zrun[120]; // FIXME: Why only 120 here?
};
enum {
kScrolltime = 500, // ms scrolling is supposed to take
kPictureDelay = 20
};
#define NUM_SHAKE_POSITIONS 8
static const int8 shake_positions[NUM_SHAKE_POSITIONS] = {
0, 1 * 2, 2 * 2, 1 * 2, 0 * 2, 2 * 2, 3 * 2, 1 * 2
};
/**
* The following structs define four basic fades/transitions used by
* transitionEffect(), each looking differently to the user.
* Note that the stripTables contain strip numbers, and they assume
* that the screen has 40 vertical strips (i.e. 320 pixel), and 25 horizontal
* strips (i.e. 200 pixel). There is a hack in transitionEffect that
* makes it work correctly in games which have a different screen height
* (for example, 240 pixel), but nothing is done regarding the width, so this
* code won't work correctly in COMI. Also, the number of iteration depends
* on min(vertStrips, horizStrips}. So the 13 is derived from 25/2, rounded up.
* And the 25 = min(25,40). Hence for Zak256 instead of 13 and 25, the values
* 15 and 30 should be used, and for COMI probably 30 and 60.
*/
struct TransitionEffect {
byte numOfIterations;
int8 deltaTable[16]; // four times l / t / r / b
byte stripTable[16]; // ditto
};
#ifdef __PALM_OS__
static const TransitionEffect *transitionEffects;
#else
static const TransitionEffect transitionEffects[5] = {
// Iris effect (looks like an opening/closing camera iris)
{
13, // Number of iterations
{
1, 1, -1, 1,
-1, 1, -1, -1,
1, -1, -1, -1,
1, 1, 1, -1
},
{
0, 0, 39, 0,
39, 0, 39, 24,
0, 24, 39, 24,
0, 0, 0, 24
}
},
// Box wipe (a box expands from the upper-left corner to the lower-right corner)
{
25, // Number of iterations
{
0, 1, 2, 1,
2, 0, 2, 1,
2, 0, 2, 1,
0, 0, 0, 0
},
{
0, 0, 0, 0,
0, 0, 0, 0,
1, 0, 1, 0,
255, 0, 0, 0
}
},
// Box wipe (a box expands from the lower-right corner to the upper-left corner)
{
25, // Number of iterations
{
-2, -1, 0, -1,
-2, -1, -2, 0,
-2, -1, -2, 0,
0, 0, 0, 0
},
{
39, 24, 39, 24,
39, 24, 39, 24,
38, 24, 38, 24,
255, 0, 0, 0
}
},
// Inverse box wipe
{
25, // Number of iterations
{
0, -1, -2, -1,
-2, 0, -2, -1,
-2, 0, -2, -1,
0, 0, 0, 0
},
{
0, 24, 39, 24,
39, 0, 39, 24,
38, 0, 38, 24,
255, 0, 0, 0
}
},
// Inverse iris effect, specially tailored for V1/V2 games
{
9, // Number of iterations
{
-1, -1, 1, -1,
-1, 1, 1, 1,
-1, -1, -1, 1,
1, -1, 1, 1
},
{
7, 7, 32, 7,
7, 8, 32, 8,
7, 8, 7, 8,
32, 7, 32, 8
}
}
};
#endif
#pragma mark -
#pragma mark --- Virtual Screens ---
#pragma mark -
#define CHARSET_MASK_TRANSPARENCY 253
Gdi::Gdi(ScummEngine *vm) {
memset(this, 0, sizeof(*this));
_vm = vm;
_roomPalette = vm->_roomPalette;
if ((vm->_features & GF_AMIGA) && (vm->_version >= 4))
_roomPalette += 16;
_compositeBuf = 0;
_textSurface.pixels = 0;
}
void ScummEngine::initScreens(int b, int h) {
int i;
for (i = 0; i < 3; i++) {
nukeResource(rtBuffer, i + 1);
nukeResource(rtBuffer, i + 5);
}
if (!getResourceAddress(rtBuffer, 4)) {
// Since the size of screen 3 is fixed, there is no need to reallocate
// it if its size changed.
// Not sure what it is good for, though. I think it may have been used
// in pre-V7 for the games messages (like 'Pause', Yes/No dialogs,
// version display, etc.). I don't know about V7, maybe the same is the
// case there. If so, we could probably just remove it completely.
if (_version >= 7) {
initVirtScreen(kUnkVirtScreen, 0, (_screenHeight / 2) - 10, _screenWidth, 13, false, false);
} else {
initVirtScreen(kUnkVirtScreen, 0, 80, _screenWidth, 13, false, false);
}
}
initVirtScreen(kMainVirtScreen, 0, b, _screenWidth, h - b, true, true);
initVirtScreen(kTextVirtScreen, 0, 0, _screenWidth, b, false, false);
initVirtScreen(kVerbVirtScreen, 0, h, _screenWidth, _screenHeight - h, false, false);
_screenB = b;
_screenH = h;
gdi.init();
}
void Gdi::init() {
const int size = _vm->_screenWidth * _vm->_screenHeight;
free(_compositeBuf);
free(_textSurface.pixels);
_compositeBuf = (byte *)malloc(size);
_textSurface.pixels = malloc(size);
memset(_compositeBuf, CHARSET_MASK_TRANSPARENCY, size);
memset(_textSurface.pixels, CHARSET_MASK_TRANSPARENCY, size);
_textSurface.w = _vm->_screenWidth;
_textSurface.h = _vm->_screenHeight;
_textSurface.pitch = _vm->_screenWidth;
_textSurface.bytesPerPixel = 1;
_numStrips = _vm->_screenWidth / 8;
// Increase the number of screen strips by one; needed for smooth scrolling
if (_vm->_version >= 7) {
// We now have mostly working smooth scrolling code in place for V7+ games
// (i.e. The Dig, Full Throttle and COMI). It seems to work very well so far.
// One area which still may need some work are the AKOS codecs (except for
// codec 1, which I already updated): their masking code may need adjustments,
// similar to the treatment codec 1 received.
//
// To understand how we achieve smooth scrolling, first note that with it, the
// virtual screen strips don't match the display screen strips anymore. To
// overcome that problem, we simply use a screen pitch that is 8 pixel wider
// than the actual screen width, and always draw one strip more than needed to
// the backbuf (of course we have to treat the right border seperately). This
_numStrips += 1;
}
}
void ScummEngine::initVirtScreen(VirtScreenNumber slot, int number, int top, int width, int height, bool twobufs,
bool scrollable) {
VirtScreen *vs = &virtscr[slot];
int size;
assert(height >= 0);
assert(slot >= 0 && slot < 4);
if (_version >= 7) {
if (slot == kMainVirtScreen && (_roomHeight != 0))
height = _roomHeight;
}
vs->number = slot;
vs->w = width;
vs->topline = top;
vs->h = height;
vs->hasTwoBuffers = twobufs;
vs->xstart = 0;
vs->backBuf = NULL;
vs->bytesPerPixel = 1;
vs->pitch = width;
if (_version >= 7) {
// Increase the pitch by one; needed to accomodate the extra
// screen strip which we use to implement smooth scrolling.
// See Gdi::init()
vs->pitch += 8;
}
size = vs->pitch * vs->h;
if (scrollable) {
// Allow enough spaces so that rooms can be up to 4 resp. 8 screens
// wide. To achieve (horizontal!) scrolling, we use a neat trick:
// only the offset into the screen buffer (xstart) is changed. That way
// very little of the screen has to be redrawn, and we have a very low
// memory overhead (namely for every pixel we want to scroll, we need
// one additional byte in the buffer).
if (_version >= 7) {
size += vs->pitch * 8;
} else {
size += vs->pitch * 4;
}
}
createResource(rtBuffer, slot + 1, size);
vs->pixels = getResourceAddress(rtBuffer, slot + 1);
memset(vs->pixels, 0, size); // reset background
if (twobufs) {
vs->backBuf = createResource(rtBuffer, slot + 5, size);
}
if (slot != 3) {
vs->setDirtyRange(0, height);
}
}
VirtScreen *ScummEngine::findVirtScreen(int y) {
VirtScreen *vs = virtscr;
int i;
for (i = 0; i < 3; i++, vs++) {
if (y >= vs->topline && y < vs->topline + vs->h) {
return vs;
}
}
return NULL;
}
void ScummEngine::markRectAsDirty(VirtScreenNumber virt, int left, int right, int top, int bottom, int dirtybit) {
VirtScreen *vs = &virtscr[virt];
int lp, rp;
if (left > right || top > bottom)
return;
if (top > vs->h || bottom < 0)
return;
if (top < 0)
top = 0;
if (bottom > vs->h)
bottom = vs->h;
if (virt == kMainVirtScreen && dirtybit) {
lp = left / 8 + _screenStartStrip;
if (lp < 0)
lp = 0;
rp = (right + vs->xstart) / 8;
if (_version >= 7) {
if (rp > 409)
rp = 409;
} else {
if (rp >= 200)
rp = 200;
}
for (; lp <= rp; lp++)
setGfxUsageBit(lp, dirtybit);
}
// The following code used to be in the separate method setVirtscreenDirty
lp = left / 8;
rp = right / 8;
if ((lp >= gdi._numStrips) || (rp < 0))
return;
if (lp < 0)
lp = 0;
if (rp >= gdi._numStrips)
rp = gdi._numStrips - 1;
while (lp <= rp) {
if (top < vs->tdirty[lp])
vs->tdirty[lp] = top;
if (bottom > vs->bdirty[lp])
vs->bdirty[lp] = bottom;
lp++;
}
}
/**
* Update all dirty screen areas. This method blits all of the internal engine
* graphics to the actual display, as needed. In addition, the 'shaking'
* code in the backend is controlled from here.
*/
void ScummEngine::drawDirtyScreenParts() {
// Update verbs
updateDirtyScreen(kVerbVirtScreen);
// Update the conversation area (at the top of the screen)
updateDirtyScreen(kTextVirtScreen);
// Update game area ("stage")
if (camera._last.x != camera._cur.x || (_features & GF_NEW_CAMERA && (camera._cur.y != camera._last.y))) {
// Camera moved: redraw everything
VirtScreen *vs = &virtscr[kMainVirtScreen];
gdi.drawStripToScreen(vs, 0, vs->w, 0, vs->h);
vs->setDirtyRange(vs->h, 0);
} else {
updateDirtyScreen(kMainVirtScreen);
}
// Handle shaking
if (_shakeEnabled) {
_shakeFrame = (_shakeFrame + 1) % NUM_SHAKE_POSITIONS;
_system->setShakePos(shake_positions[_shakeFrame]);
} else if (!_shakeEnabled &&_shakeFrame != 0) {
_shakeFrame = 0;
_system->setShakePos(0);
}
}
void ScummEngine::updateDirtyScreen(VirtScreenNumber slot) {
gdi.updateDirtyScreen(&virtscr[slot]);
}
/**
* Blit the dirty data from the given VirtScreen to the display. If the camera moved,
* a full blit is done, otherwise only the visible dirty areas are updated.
*/
void Gdi::updateDirtyScreen(VirtScreen *vs) {
// Do nothing for unused virtual screens
if (vs->h == 0)
return;
int i;
int w = 8;
int start = 0;
for (i = 0; i < _numStrips; i++) {
if (vs->bdirty[i]) {
const int top = vs->tdirty[i];
const int bottom = vs->bdirty[i];
vs->tdirty[i] = vs->h;
vs->bdirty[i] = 0;
if (i != (_numStrips - 1) && vs->bdirty[i + 1] == bottom && vs->tdirty[i + 1] == top) {
// Simple optimizations: if two or more neighbouring strips
// form one bigger rectangle, coalesce them.
w += 8;
continue;
}
drawStripToScreen(vs, start * 8, w, top, bottom);
w = 8;
}
start = i + 1;
}
}
/**
* Blit the specified rectangle from the given virtual screen to the display.
* Note: t and b are in *virtual screen* coordinates, while x is relative to
* the *real screen*. This is due to the way tdirty/vdirty work: they are
* arrays which map 'strips' (sections of the real screen) to dirty areas as
* specified by top/bottom coordinate in the virtual screen.
*/
void Gdi::drawStripToScreen(VirtScreen *vs, int x, int width, int top, int bottom) {
if (bottom <= top)
return;
if (top >= vs->h)
return;
assert(top >= 0 && bottom <= vs->h); // Paranoia checks
assert(x >= 0 && width <= vs->pitch);
assert(_textSurface.pixels);
assert(_compositeBuf);
if (width > vs->w - x)
width = vs->w - x;
// Clip to the visible part of the scene
if (top < _vm->_screenTop)
top = _vm->_screenTop;
if (bottom > _vm->_screenTop + _vm->_screenHeight)
bottom = _vm->_screenTop + _vm->_screenHeight;
// Convert the vertical coordinates to real screen coords
const int y = vs->topline + top - _vm->_screenTop;
const int height = bottom - top;
// Compute screen etc. buffer pointers
const byte *src = vs->getPixels(x, top);
byte *dst = _compositeBuf + x + y * _vm->_screenWidth;
const byte *text = (byte *)_textSurface.pixels + x + y * _textSurface.pitch;
#ifdef __PALM_OS__
ARM_START(DrawStripType)
ARM_INIT(SCUMM_DRAWSTRIP)
ARM_ADDM(width)
ARM_ADDM(height)
ARM_ADDM(src)
ARM_ADDM(dst)
ARM_ADDM(text)
ARM_ADDV(_vm_screenWidth, _vm->_screenWidth)
ARM_ADDV(vs_pitch, vs->pitch)
ARM_ADDV(_textSurface_pitch, _textSurface.pitch)
ARM_CALL(ARM_ENGINE, PNO_DATA())
ARM_CONTINUE()
#endif
// Compose the text over the game graphics
for (int h = 0; h < height; ++h) {
for (int w = 0; w < width; ++w) {
if (text[w] == CHARSET_MASK_TRANSPARENCY)
dst[w] = src[w];
else
dst[w] = text[w];
}
src += vs->pitch;
dst += _vm->_screenWidth;
text += _textSurface.pitch;
}
// Finally blit the whole thing to the screen
_vm->_system->copyRectToScreen(_compositeBuf + x + y * _vm->_screenWidth, _vm->_screenWidth, x, y, width, height);
}
#pragma mark -
#pragma mark --- Background buffers & charset mask ---
#pragma mark -
void ScummEngine::initBGBuffers(int height) {
const byte *ptr;
int size, itemsize, i;
byte *room;
if (_version >= 7) {
// Resize main virtual screen in V7 games. This is necessary
// because in V7, rooms may be higher than one screen, so we have
// to accomodate for that.
initVirtScreen(kMainVirtScreen, 0, virtscr[0].topline, _screenWidth, height, 1, 1);
}
if (_heversion >= 70)
room = getResourceAddress(rtRoomImage, _roomResource);
else
room = getResourceAddress(rtRoom, _roomResource);
if (_version <= 3) {
gdi._numZBuffer = 2;
} else if (_features & GF_SMALL_HEADER) {
int off;
ptr = findResourceData(MKID('SMAP'), room);
gdi._numZBuffer = 0;
if (_gameId == GID_MONKEY_EGA || _gameId == GID_PASS)
off = READ_LE_UINT16(ptr);
else
off = READ_LE_UINT32(ptr);
while (off && gdi._numZBuffer < 4) {
gdi._numZBuffer++;
ptr += off;
off = READ_LE_UINT16(ptr);
}
} else if (_version == 8) {
// in V8 there is no RMIH and num z buffers is in RMHD
ptr = findResource(MKID('RMHD'), room);
gdi._numZBuffer = READ_LE_UINT32(ptr + 24) + 1;
} else if (_heversion >= 70) {
ptr = findResource(MKID('RMIH'), room);
gdi._numZBuffer = READ_LE_UINT16(ptr + 8) + 1;
} else {
ptr = findResource(MKID('RMIH'), findResource(MKID('RMIM'), room));
gdi._numZBuffer = READ_LE_UINT16(ptr + 8) + 1;
}
assert(gdi._numZBuffer >= 1 && gdi._numZBuffer <= 8);
if (_version >= 7)
itemsize = (_roomHeight + 10) * gdi._numStrips;
else
itemsize = (_roomHeight + 4) * gdi._numStrips;
size = itemsize * gdi._numZBuffer;
memset(createResource(rtBuffer, 9, size), 0, size);
for (i = 0; i < (int)ARRAYSIZE(gdi._imgBufOffs); i++) {
if (i < gdi._numZBuffer)
gdi._imgBufOffs[i] = i * itemsize;
else
gdi._imgBufOffs[i] = (gdi._numZBuffer - 1) * itemsize;
}
}
/**
* Redraw background as needed, i.e. the left/right sides if scrolling took place etc.
* Note that this only updated the virtual screen, not the actual display.
*/
void ScummEngine::redrawBGAreas() {
int i;
int diff;
int val = 0;
if (!(_features & GF_NEW_CAMERA))
if (camera._cur.x != camera._last.x && _charset->_hasMask && (_version > 3 && _gameId != GID_PASS))
stopTalk();
// Redraw parts of the background which are marked as dirty.
if (!_fullRedraw && _bgNeedsRedraw) {
for (i = 0; i != gdi._numStrips; i++) {
if (testGfxUsageBit(_screenStartStrip + i, USAGE_BIT_DIRTY)) {
redrawBGStrip(i, 1);
}
}
}
if (_features & GF_NEW_CAMERA) {
diff = camera._cur.x / 8 - camera._last.x / 8;
if (_fullRedraw == 0 && diff == 1) {
val = 2;
redrawBGStrip(gdi._numStrips - 1, 1);
} else if (_fullRedraw == 0 && diff == -1) {
val = 1;
redrawBGStrip(0, 1);
} else if (_fullRedraw != 0 || diff != 0) {
_bgNeedsRedraw = false;
redrawBGStrip(0, gdi._numStrips);
}
} else {
if (_fullRedraw == 0 && camera._cur.x - camera._last.x == 8) {
val = 2;
redrawBGStrip(gdi._numStrips - 1, 1);
} else if (_fullRedraw == 0 && camera._cur.x - camera._last.x == -8) {
val = 1;
redrawBGStrip(0, 1);
} else if (_fullRedraw != 0 || camera._cur.x != camera._last.x) {
_bgNeedsRedraw = false;
_flashlight.isDrawn = false;
redrawBGStrip(0, gdi._numStrips);
}
}
drawRoomObjects(val);
_bgNeedsRedraw = false;
}
void ScummEngine_v70he::redrawBGAreas() {
if (_heversion == 70) {
ScummEngine::redrawBGAreas();
return;
}
int val = 0;
if (camera._cur.x != camera._last.x && _charset->_hasMask)
stopTalk();
byte *room = getResourceAddress(rtRoomImage, _roomResource) + _IM00_offs;
if (findResource(MKID('BMAP'), room) != NULL) {
if (_fullRedraw) {
_bgNeedsRedraw = false;
gdi.drawBMAPBg(room, &virtscr[0], _screenStartStrip);
}
} else if (findResource(MKID('SMAP'), room) == NULL) {
warning("redrawBGAreas(): Both SMAP and BMAP are missing...");
}
drawRoomObjects(val);
_bgNeedsRedraw = false;
}
void ScummEngine_v72he::redrawBGAreas() {
ScummEngine_v70he::redrawBGAreas();
flushWizBuffer();
}
void ScummEngine::redrawBGStrip(int start, int num) {
byte *room;
int s = _screenStartStrip + start;
assert(s >= 0 && (size_t) s < sizeof(gfxUsageBits) / (3 * sizeof(gfxUsageBits[0])));
for (int i = 0; i < num; i++)
setGfxUsageBit(s + i, USAGE_BIT_DIRTY);
if (_version == 1) {
gdi._C64ObjectMode = false;
}
if (_heversion >= 70)
room = getResourceAddress(rtRoomImage, _roomResource);
else
room = getResourceAddress(rtRoom, _roomResource);
gdi.drawBitmap(room + _IM00_offs,
&virtscr[0], s, 0, _roomWidth, virtscr[0].h, s, num, 0, _roomStrips);
}
void ScummEngine::restoreBG(Common::Rect rect, byte backColor) {
VirtScreen *vs;
byte *screenBuf;
if (rect.top < 0)
rect.top = 0;
if (rect.left >= rect.right || rect.top >= rect.bottom)
return;
if ((vs = findVirtScreen(rect.top)) == NULL)
return;
if (rect.left > vs->w)
return;
// Convert 'rect' to local (virtual screen) coordinates
rect.top -= vs->topline;
rect.bottom -= vs->topline;
rect.clip(vs->w, vs->h);
markRectAsDirty(vs->number, rect, USAGE_BIT_RESTORED);
screenBuf = vs->getPixels(rect.left, rect.top);
const int height = rect.height();
const int width = rect.width();
if (!height)
return;
if (vs->hasTwoBuffers && _currentRoom != 0 && isLightOn()) {
blit(screenBuf, vs->pitch, vs->getBackPixels(rect.left, rect.top), vs->pitch, width, height);
if (vs->number == kMainVirtScreen && _charset->_hasMask) {
byte *mask = (byte *)gdi._textSurface.pixels + gdi._textSurface.pitch * (rect.top - _screenTop) + rect.left;
fill(mask, gdi._textSurface.pitch, CHARSET_MASK_TRANSPARENCY, width, height);
}
} else {
fill(screenBuf, vs->pitch, backColor, width, height);
}
}
void CharsetRenderer::restoreCharsetBg() {
_nextLeft = _vm->_string[0].xpos;
_nextTop = _vm->_string[0].ypos + _vm->_screenTop;
if (_hasMask) {
_hasMask = false;
_str.left = -1;
_left = -1;
// Restore background on the whole text area. This code is based on
// restoreBG(), but was changed to only restore those parts which are
// currently covered by the charset mask.
VirtScreen *vs = &_vm->virtscr[_textScreenID];
if (!vs->h)
return;
_vm->markRectAsDirty(vs->number, Common::Rect(vs->w, vs->h), USAGE_BIT_RESTORED);
byte *screenBuf = vs->getPixels(0, 0);
if (vs->hasTwoBuffers && _vm->_currentRoom != 0 && _vm->isLightOn()) {
if (vs->number != kMainVirtScreen) {
// Restore from back buffer
const byte *backBuf = vs->getBackPixels(0, 0);
blit(screenBuf, vs->pitch, backBuf, vs->pitch, vs->w, vs->h);
}
} else {
// Clear area
memset(screenBuf, 0, vs->h * vs->pitch);
}
if (vs->hasTwoBuffers) {
// Clean out the charset mask
memset(_vm->gdi._textSurface.pixels, CHARSET_MASK_TRANSPARENCY, _vm->gdi._textSurface.pitch * _vm->gdi._textSurface.h);
}
}
}
void CharsetRenderer::clearCharsetMask() {
memset(_vm->getResourceAddress(rtBuffer, 9), 0, _vm->gdi._imgBufOffs[1]);
}
byte *ScummEngine::getMaskBuffer(int x, int y, int z) {
return gdi.getMaskBuffer((x + virtscr[0].xstart) / 8, y, z);
}
byte *Gdi::getMaskBuffer(int x, int y, int z) {
return _vm->getResourceAddress(rtBuffer, 9)
+ x + y * _numStrips + _imgBufOffs[z];
}
#pragma mark -
#pragma mark --- Misc ---
#pragma mark -
static void blit(byte *dst, int dstPitch, const byte *src, int srcPitch, int w, int h) {
assert(w > 0);
assert(h > 0);
assert(src != NULL);
assert(dst != NULL);
if (w == srcPitch && w == dstPitch) {
memcpy(dst, src, w*h);
} else {
do {
memcpy(dst, src, w);
dst += dstPitch;
src += srcPitch;
} while (--h);
}
}
static void fill(byte *dst, int dstPitch, byte color, int w, int h) {
assert(h > 0);
assert(dst != NULL);
if (w == dstPitch) {
memset(dst, color, w*h);
} else {
do {
memset(dst, color, w);
dst += dstPitch;
} while (--h);
}
}
static void copy8Col(byte *dst, int dstPitch, const byte *src, int height) {
do {
#if defined(SCUMM_NEED_ALIGNMENT)
memcpy(dst, src, 8);
#else
((uint32 *)dst)[0] = ((const uint32 *)src)[0];
((uint32 *)dst)[1] = ((const uint32 *)src)[1];
#endif
dst += dstPitch;
src += dstPitch;
} while (--height);
}
static void clear8Col(byte *dst, int dstPitch, int height) {
do {
#if defined(SCUMM_NEED_ALIGNMENT)
memset(dst, 0, 8);
#else
((uint32 *)dst)[0] = 0;
((uint32 *)dst)[1] = 0;
#endif
dst += dstPitch;
} while (--height);
}
void ScummEngine::drawBox(int x, int y, int x2, int y2, int color) {
int width, height;
VirtScreen *vs;
byte *backbuff, *bgbuff;
if ((vs = findVirtScreen(y)) == NULL)
return;
if (x > x2)
SWAP(x, x2);
if (y > y2)
SWAP(y, y2);
x2++;
y2++;
// Adjust for the topline of the VirtScreen
y -= vs->topline;
y2 -= vs->topline;
// Clip the coordinates
if (x < 0)
x = 0;
else if (x >= vs->w)
return;
if (x2 < 0)
return;
else if (x2 > vs->w)
x2 = vs->w;
if (y < 0)
y = 0;
else if (y > vs->h)
return;
if (y2 < 0)
return;
else if (y2 > vs->h)
y2 = vs->h;
width = x2 - x;
height = y2 - y;
// This will happen in the Sam & Max intro - see bug #1039162 - where
// it would trigger an assertion in blit().
if (width <= 0 || height <= 0)
return;
markRectAsDirty(vs->number, x, x2, y, y2);
backbuff = vs->getPixels(x, y);
if (color == -1) {
if (vs->number != kMainVirtScreen)
error("can only copy bg to main window");
bgbuff = vs->getBackPixels(x, y);
blit(backbuff, vs->pitch, bgbuff, vs->pitch, width, height);
} else {
fill(backbuff, vs->pitch, color, width, height);
}
}
void ScummEngine::drawFlashlight() {
int i, j, x, y;
VirtScreen *vs = &virtscr[kMainVirtScreen];
// Remove the flash light first if it was previously drawn
if (_flashlight.isDrawn) {
markRectAsDirty(kMainVirtScreen, _flashlight.x, _flashlight.x + _flashlight.w,
_flashlight.y, _flashlight.y + _flashlight.h, USAGE_BIT_DIRTY);
if (_flashlight.buffer) {
fill(_flashlight.buffer, vs->pitch, 0, _flashlight.w, _flashlight.h);
}
_flashlight.isDrawn = false;
}
if (_flashlight.xStrips == 0 || _flashlight.yStrips == 0)
return;
// Calculate the area of the flashlight
if (_gameId == GID_ZAK256 || _version <= 2) {
x = _mouse.x + vs->xstart;
y = _mouse.y - vs->topline;
} else {
Actor *a = derefActor(VAR(VAR_EGO), "drawFlashlight");
x = a->_pos.x;
y = a->_pos.y;
}
_flashlight.w = _flashlight.xStrips * 8;
_flashlight.h = _flashlight.yStrips * 8;
_flashlight.x = x - _flashlight.w / 2 - _screenStartStrip * 8;
_flashlight.y = y - _flashlight.h / 2;
if (_gameId == GID_LOOM || _gameId == GID_LOOM256)
_flashlight.y -= 12;
// Clip the flashlight at the borders
if (_flashlight.x < 0)
_flashlight.x = 0;
else if (_flashlight.x + _flashlight.w > gdi._numStrips * 8)
_flashlight.x = gdi._numStrips * 8 - _flashlight.w;
if (_flashlight.y < 0)
_flashlight.y = 0;
else if (_flashlight.y + _flashlight.h> vs->h)
_flashlight.y = vs->h - _flashlight.h;
// Redraw any actors "under" the flashlight
for (i = _flashlight.x / 8; i < (_flashlight.x + _flashlight.w) / 8; i++) {
assert(0 <= i && i < gdi._numStrips);
setGfxUsageBit(_screenStartStrip + i, USAGE_BIT_DIRTY);
vs->tdirty[i] = 0;
vs->bdirty[i] = vs->h;
}
byte *bgbak;
_flashlight.buffer = vs->getPixels(_flashlight.x, _flashlight.y);
bgbak = vs->getBackPixels(_flashlight.x, _flashlight.y);
blit(_flashlight.buffer, vs->pitch, bgbak, vs->pitch, _flashlight.w, _flashlight.h);
// Round the corners. To do so, we simply hard-code a set of nicely
// rounded corners.
static const int corner_data[] = { 8, 6, 4, 3, 2, 2, 1, 1 };
int minrow = 0;
int maxcol = _flashlight.w - 1;
int maxrow = (_flashlight.h - 1) * vs->pitch;
for (i = 0; i < 8; i++, minrow += vs->pitch, maxrow -= vs->pitch) {
int d = corner_data[i];
for (j = 0; j < d; j++) {
_flashlight.buffer[minrow + j] = 0;
_flashlight.buffer[minrow + maxcol - j] = 0;
_flashlight.buffer[maxrow + j] = 0;
_flashlight.buffer[maxrow + maxcol - j] = 0;
}
}
_flashlight.isDrawn = true;
}
bool ScummEngine::isLightOn() const {
return (VAR_CURRENT_LIGHTS == 0xFF) || (VAR(VAR_CURRENT_LIGHTS) & LIGHTMODE_screen);
}
void ScummEngine::setShake(int mode) {
if (_shakeEnabled != (mode != 0))
_fullRedraw = true;
_shakeEnabled = mode != 0;
_shakeFrame = 0;
_system->setShakePos(0);
}
#pragma mark -
#pragma mark --- Image drawing ---
#pragma mark -
void Gdi::drawBitmapV2Helper(const byte *ptr, VirtScreen *vs, int x, int y, const int width, const int height, int stripnr, int numstrip, StripTable *table) {
const int left = (stripnr * 8);
const int right = left + (numstrip * 8);
byte *dst;
byte *mask_ptr;
const byte *src;
byte color, data = 0;
int run;
bool dither = false;
byte dither_table[128];
byte *ptr_dither_table;
int theX, theY, maxX;
memset(dither_table, 0, sizeof(dither_table));
if (vs->hasTwoBuffers)
dst = vs->backBuf + y * vs->pitch + x * 8;
else
dst = (byte *)vs->pixels + y * vs->pitch + x * 8;
mask_ptr = getMaskBuffer(x, y, 1);
if (table) {
run = table->run[stripnr];
color = table->color[stripnr];
src = ptr + table->offsets[stripnr];
theX = left;
maxX = right;
} else {
run = 1;
color = 0;
src = ptr;
theX = 0;
maxX = width;
}
// Decode and draw the image data.
assert(height <= 128);
for (; theX < maxX; theX++) {
ptr_dither_table = dither_table;
for (theY = 0; theY < height; theY++) {
if (--run == 0) {
data = *src++;
if (data & 0x80) {
run = data & 0x7f;
dither = true;
} else {
run = data >> 4;
dither = false;
}
color = _roomPalette[data & 0x0f];
if (run == 0) {
run = *src++;
}
}
if (!dither) {
*ptr_dither_table = color;
}
if (left <= theX && theX < right) {
*dst = *ptr_dither_table++;
dst += vs->pitch;
}
}
if (left <= theX && theX < right) {
dst -= _vertStripNextInc;
}
}
// Draw mask (zplane) data
theY = 0;
if (table) {
src = ptr + table->zoffsets[stripnr];
run = table->zrun[stripnr];
theX = left;
} else {
run = *src++;
theX = 0;
}
while (theX < right) {
const byte runFlag = run & 0x80;
if (runFlag) {
run &= 0x7f;
data = *src++;
}
do {
if (!runFlag)
data = *src++;
if (left <= theX) {
*mask_ptr = data;
mask_ptr += _numStrips;
}
theY++;
if (theY >= height) {
if (left <= theX) {
mask_ptr -= _numStrips * height - 1;
}
theY = 0;
theX += 8;
if (theX >= right)
break;
}
} while (--run);
run = *src++;
}
}
int Gdi::getZPlanes(const byte *ptr, const byte *zplane_list[9], bool bmapImage) const {
int numzbuf;
int i;
if ((_vm->_features & GF_SMALL_HEADER) || _vm->_version == 8)
zplane_list[0] = ptr;
else if (bmapImage)
zplane_list[0] = _vm->findResource(MKID('BMAP'), ptr);
else
zplane_list[0] = _vm->findResource(MKID('SMAP'), ptr);
if (_zbufferDisabled)
numzbuf = 0;
else if (_numZBuffer <= 1 || (_vm->_version <= 2))
numzbuf = _numZBuffer;
else {
numzbuf = _numZBuffer;
assert(numzbuf <= 9);
if (_vm->_features & GF_SMALL_HEADER) {
if (_vm->_features & GF_16COLOR)
zplane_list[1] = ptr + READ_LE_UINT16(ptr);
else
zplane_list[1] = ptr + READ_LE_UINT32(ptr);
if (_vm->_features & GF_OLD256) {
if (0 == READ_LE_UINT32(zplane_list[1]))
zplane_list[1] = 0;
}
for (i = 2; i < numzbuf; i++) {
zplane_list[i] = zplane_list[i-1] + READ_LE_UINT16(zplane_list[i-1]);
}
} else if (_vm->_version == 8) {
// Find the OFFS chunk of the ZPLN chunk
const byte *zplnOffsChunkStart = ptr + 24 + READ_BE_UINT32(ptr + 12);
// Each ZPLN contains a WRAP chunk, which has (as always) an OFFS subchunk pointing
// at ZSTR chunks. These once more contain a WRAP chunk which contains nothing but
// an OFFS chunk. The content of this OFFS chunk contains the offsets to the
// Z-planes.
// We do not directly make use of this, but rather hard code offsets (like we do
// for all other Scumm-versions, too). Clearly this is a bit hackish, but works
// well enough, and there is no reason to assume that there are any cases where it
// might fail. Still, doing this properly would have the advantage of catching
// invalid/damaged data files, and allow us to exit gracefully instead of segfaulting.
for (i = 1; i < numzbuf; i++) {
zplane_list[i] = zplnOffsChunkStart + READ_LE_UINT32(zplnOffsChunkStart + 4 + i*4) + 16;
}
} else {
const uint32 zplane_tags[] = {
MKID('ZP00'),
MKID('ZP01'),
MKID('ZP02'),
MKID('ZP03'),
MKID('ZP04')
};
for (i = 1; i < numzbuf; i++) {
zplane_list[i] = _vm->findResource(zplane_tags[i], ptr);
}
}
}
return numzbuf;
}
/**
* Draw a bitmap onto a virtual screen. This is main drawing method for room backgrounds
* and objects, used throughout all SCUMM versions.
*/
void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, int y, const int width, const int height,
int stripnr, int numstrip, byte flag, StripTable *table) {
assert(ptr);
assert(height > 0);
byte *dstPtr;
const byte *smap_ptr;
const byte *z_plane_ptr;
byte *mask_ptr;
int i;
const byte *zplane_list[9];
int bottom;
int numzbuf;
int sx;
bool useOrDecompress = false;
// Check whether lights are turned on or not
const bool lightsOn = _vm->isLightOn();
CHECK_HEAP;
if (_vm->_features & GF_SMALL_HEADER) {
smap_ptr = ptr;
} else if (_vm->_version == 8) {
// Skip to the BSTR->WRAP->OFFS chunk
smap_ptr = ptr + 24;
} else
smap_ptr = _vm->findResource(MKID('SMAP'), ptr);
assert(smap_ptr);
numzbuf = getZPlanes(ptr, zplane_list, false);
bottom = y + height;
if (bottom > vs->h) {
warning("Gdi::drawBitmap, strip drawn to %d below window bottom %d", bottom, vs->h);
}
_vertStripNextInc = height * vs->pitch - 1;
//
// Since V3, all graphics data was encoded in strips, which is very efficient
// for redrawing only parts of the screen. However, V2 is different: here
// the whole graphics are encoded as one big chunk. That makes it rather
// dificult to draw only parts of a room/object. We handle the V2 graphics
// differently from all other (newer) graphic formats for this reason.
//
if (_vm->_version == 2)
drawBitmapV2Helper(ptr, vs, x, y, width, height, stripnr, numstrip, table);
sx = x - vs->xstart / 8;
if (sx < 0) {
numstrip -= -sx;
x += -sx;
stripnr += -sx;
sx = 0;
}
// FIXME Still not been calculated correctly
while (numstrip > 0 && sx < _numStrips && x * 8 < MAX(_vm->_roomWidth, (int) vs->w)) {
CHECK_HEAP;
if (y < vs->tdirty[sx])
vs->tdirty[sx] = y;
if (bottom > vs->bdirty[sx])
vs->bdirty[sx] = bottom;
// In the case of a double buffered virtual screen, we draw to
// the backbuffer, otherwise to the primary surface memory.
if (vs->hasTwoBuffers)
dstPtr = vs->backBuf + y * vs->pitch + x * 8;
else
dstPtr = (byte *)vs->pixels + y * vs->pitch + x * 8;
if (_vm->_version == 1) {
if (_C64ObjectMode)
drawStripC64Object(dstPtr, vs->pitch, stripnr, width, height);
else
drawStripC64Background(dstPtr, vs->pitch, stripnr, height);
} else if (_vm->_version == 2) {
// Do nothing here for V2 games - drawing was already handled.
} else {
if (_vm->_features & GF_16COLOR) {
drawStripEGA(dstPtr, vs->pitch, smap_ptr + READ_LE_UINT16(smap_ptr + stripnr * 2 + 2), height);
} else if (_vm->_features & GF_SMALL_HEADER) {
useOrDecompress = decompressBitmap(dstPtr, vs->pitch, smap_ptr + READ_LE_UINT32(smap_ptr + stripnr * 4 + 4), height);
} else {
useOrDecompress = decompressBitmap(dstPtr, vs->pitch, smap_ptr + READ_LE_UINT32(smap_ptr + stripnr * 4 + 8), height);
}
}
CHECK_HEAP;
if (vs->hasTwoBuffers) {
byte *frontBuf = (byte *)vs->pixels + y * vs->pitch + x * 8;
if (lightsOn)
copy8Col(frontBuf, vs->pitch, dstPtr, height);
else
clear8Col(frontBuf, vs->pitch, height);
}
CHECK_HEAP;
// COMI and HE games only uses flag value
if (_vm->_version == 8 || (_vm->_features & GF_HUMONGOUS))
useOrDecompress = true;
if (_vm->_version == 1) {
mask_ptr = getMaskBuffer(x, y, 1);
drawStripC64Mask(mask_ptr, stripnr, width, height);
} else if (_vm->_version == 2) {
// Do nothing here for V2 games - zplane was already handled.
} else if (flag & dbDrawMaskOnAll) {
// Sam & Max uses dbDrawMaskOnAll for things like the inventory
// box and the speech icons. While these objects only have one
// mask, it should be applied to all the Z-planes in the room,
// i.e. they should mask every actor.
//
// This flag used to be called dbDrawMaskOnBoth, and all it
// would do was to mask Z-plane 0. (Z-plane 1 would also be
// masked, because what is now the else-clause used to be run
// always.) While this seems to be the only way there is to
// mask Z-plane 0, this wasn't good enough since actors in
// Z-planes >= 2 would not be masked.
//
// The flag is also used by The Dig and Full Throttle, but I
// don't know what for. At the time of writing, these games
// are still too unstable for me to investigate.
if (_vm->_version == 8)
z_plane_ptr = zplane_list[1] + READ_LE_UINT32(zplane_list[1] + stripnr * 4 + 8);
else
z_plane_ptr = zplane_list[1] + READ_LE_UINT16(zplane_list[1] + stripnr * 2 + 8);
for (i = 0; i < numzbuf; i++) {
mask_ptr = getMaskBuffer(x, y, i);
if (useOrDecompress && (flag & dbAllowMaskOr))
decompressMaskImgOr(mask_ptr, z_plane_ptr, height);
else
decompressMaskImg(mask_ptr, z_plane_ptr, height);
}
} else {
for (i = 1; i < numzbuf; i++) {
uint32 offs;
if (!zplane_list[i])
continue;
if (_vm->_features & GF_OLD_BUNDLE)
offs = READ_LE_UINT16(zplane_list[i] + stripnr * 2);
else if (_vm->_features & GF_OLD256)
offs = READ_LE_UINT16(zplane_list[i] + stripnr * 2 + 4);
else if (_vm->_features & GF_SMALL_HEADER)
offs = READ_LE_UINT16(zplane_list[i] + stripnr * 2 + 2);
else if (_vm->_version == 8)
offs = READ_LE_UINT32(zplane_list[i] + stripnr * 4 + 8);
else
offs = READ_LE_UINT16(zplane_list[i] + stripnr * 2 + 8);
mask_ptr = getMaskBuffer(x, y, i);
if (offs) {
z_plane_ptr = zplane_list[i] + offs;
if (useOrDecompress && (flag & dbAllowMaskOr)) {
decompressMaskImgOr(mask_ptr, z_plane_ptr, height);
} else {
decompressMaskImg(mask_ptr, z_plane_ptr, height);
}
} else {
if (!(useOrDecompress && (flag & dbAllowMaskOr)))
for (int h = 0; h < height; h++)
mask_ptr[h * _numStrips] = 0;
// FIXME: needs better abstraction
}
}
}
numstrip--;
x++;
sx++;
stripnr++;
}
}
/**
* Draw a bitmap onto a virtual screen. This is main drawing method for room backgrounds
* used throughout in 7.2+ HE versions.
*
* @note This function essentially is a stripped down & special cased version of
* the generic Gdi::drawBitmap() method.
*/
void Gdi::drawBMAPBg(const byte *ptr, VirtScreen *vs, int startstrip) {
assert(ptr);
const byte *bmap_ptr;
byte code;
const byte *z_plane_ptr;
byte *mask_ptr;
const byte *zplane_list[9];
bmap_ptr = _vm->findResourceData(MKID('BMAP'), ptr);
assert(bmap_ptr);
code = *bmap_ptr++;
// The following few lines more or less duplicate decompressBitmap(), only
// for an area spanning multiple strips. In particular, the codecs 13 & 14
// in decompressBitmap call drawStripHE()
_decomp_shr = code % 10;
_decomp_mask = 0xFF >> (8 - _decomp_shr);
code /= 10;
switch (code) {
case 13:
drawStripHE((byte *)vs->backBuf, vs->pitch, bmap_ptr, vs->w, vs->h, false);
break;
case 14:
drawStripHE((byte *)vs->backBuf, vs->pitch, bmap_ptr, vs->w, vs->h, true);
break;
case 15:
fill((byte *)vs->backBuf, vs->pitch, *bmap_ptr, vs->w, vs->h);
break;
default:
// Alternayive russian freddi3 uses badly formatted bitmaps
warning("Gdi::drawBMAPBg: default case %d", code);
}
copyVirtScreenBuffers(Common::Rect(vs->w, vs->h));
int numzbuf = getZPlanes(ptr, zplane_list, true);
if (numzbuf <= 1)
return;
uint32 offs;
for (int stripnr = 0; stripnr < _numStrips; stripnr++)
for (int i = 1; i < numzbuf; i++) {
if (!zplane_list[i])
continue;
offs = READ_LE_UINT16(zplane_list[i] + stripnr * 2 + 8);
mask_ptr = getMaskBuffer(stripnr, 0, i);
if (offs) {
z_plane_ptr = zplane_list[i] + offs;
decompressMaskImg(mask_ptr, z_plane_ptr, vs->h);
}
}
}
void Gdi::drawBMAPObject(const byte *ptr, VirtScreen *vs, int obj, int x, int y, int w, int h) {
const byte *bmap_ptr = _vm->findResourceData(MKID('BMAP'), ptr);
assert(bmap_ptr);
byte code = *bmap_ptr++;
int scrX = _vm->_screenStartStrip * 8;
if (code == 8 || code == 9) {
Common::Rect rScreen(0, 0, vs->w, vs->h);
byte *dst = (byte *)_vm->virtscr[0].backBuf + scrX;
Wiz::copyWizImage(dst, bmap_ptr, vs->w, vs->h, x - scrX, y, w, h, &rScreen);
}
Common::Rect rect1(x, y, x + w, y + h);
Common::Rect rect2(scrX, 0, vs->w + scrX, vs->h);
if (rect1.intersects(rect2)) {
rect1.left -= rect2.left;
rect1.right -= rect2.left;
rect1.top -= rect2.top;
rect1.bottom -= rect2.top;
copyVirtScreenBuffers(rect1);
}
}
void Gdi::copyVirtScreenBuffers(const Common::Rect &rect) {
const int rw = rect.width();
const int rh = rect.height();
byte *src, *dst;
src = _vm->virtscr[0].getBackPixels(rect.left, rect.top);
dst = _vm->virtscr[0].getPixels(rect.left, rect.top);
assert(rw <= _vm->_screenWidth && rw > 0);
assert(rh <= _vm->_screenHeight && rh > 0);
blit(dst, _vm->virtscr[0].pitch, src, _vm->virtscr[0].pitch, rw, rh);
_vm->markRectAsDirty(kMainVirtScreen, rect);
}
/**
* Reset the background behind an actor or blast object.
*/
void Gdi::resetBackground(int top, int bottom, int strip) {
VirtScreen *vs = &_vm->virtscr[0];
byte *backbuff_ptr, *bgbak_ptr;
int numLinesToProcess;
assert(0 <= strip && strip < _numStrips);
if (top < vs->tdirty[strip])
vs->tdirty[strip] = top;
if (bottom > vs->bdirty[strip])
vs->bdirty[strip] = bottom;
bgbak_ptr = (byte *)vs->backBuf + top * vs->pitch + (strip + vs->xstart/8) * 8;
backbuff_ptr = (byte *)vs->pixels + top * vs->pitch + (strip + vs->xstart/8) * 8;
numLinesToProcess = bottom - top;
if (numLinesToProcess) {
if (_vm->isLightOn()) {
copy8Col(backbuff_ptr, vs->pitch, bgbak_ptr, numLinesToProcess);
} else {
clear8Col(backbuff_ptr, vs->pitch, numLinesToProcess);
}
}
}
bool Gdi::decompressBitmap(byte *dst, int dstPitch, const byte *src, int numLinesToProcess) {
assert(numLinesToProcess);
byte code = *src++;
bool useOrDecompress = false;
if (code <= 10) {
switch (code) {
case 1:
unkDecode7(dst, dstPitch, src, numLinesToProcess);
break;
case 2:
unkDecode8(dst, dstPitch, src, numLinesToProcess); /* Ender - Zak256/Indy256 */
break;
case 3:
unkDecode9(dst, dstPitch, src, numLinesToProcess); /* Ender - Zak256/Indy256 */
break;
case 4:
unkDecode10(dst, dstPitch, src, numLinesToProcess); /* Ender - Zak256/Indy256 */
break;
case 7:
unkDecode11(dst, dstPitch, src, numLinesToProcess); /* Ender - Zak256/Indy256 */
break;
case 8:
// Used in 3DO versions of HE games
useOrDecompress = true;
drawStrip3DO(dst, dstPitch, src, numLinesToProcess, true);
break;
case 9:
drawStrip3DO(dst, dstPitch, src, numLinesToProcess, false);
break;
case 10:
// Used in Amiga version of Monkey Island 1
drawStripEGA(dst, dstPitch, src, numLinesToProcess);
break;
default:
error("Gdi::decompressBitmap: default case %d", code);
}
} else {
_decomp_shr = code % 10;
_decomp_mask = 0xFF >> (8 - _decomp_shr);
code /= 10;
switch (code) {
case 1:
drawStripBasicV(dst, dstPitch, src, numLinesToProcess, false);
break;
case 2:
drawStripBasicH(dst, dstPitch, src, numLinesToProcess, false);
break;
case 3:
useOrDecompress = true;
drawStripBasicV(dst, dstPitch, src, numLinesToProcess, true);
break;
case 4:
useOrDecompress = true;
drawStripBasicH(dst, dstPitch, src, numLinesToProcess, true);
break;
case 6:
case 10:
drawStripComplex(dst, dstPitch, src, numLinesToProcess, false);
break;
case 8:
case 12:
useOrDecompress = true;
drawStripComplex(dst, dstPitch, src, numLinesToProcess, true);
break;
case 13:
drawStripHE(dst, dstPitch, src, 8, numLinesToProcess, false);
break;
case 14:
useOrDecompress = true;
drawStripHE(dst, dstPitch, src, 8, numLinesToProcess, true);
break;
default:
error("Gdi::decompressBitmap: default case %d", code);
}
}
return useOrDecompress;
}
void Gdi::decompressMaskImg(byte *dst, const byte *src, int height) const {
byte b, c;
while (height) {
b = *src++;
if (b & 0x80) {
b &= 0x7F;
c = *src++;
do {
*dst = c;
dst += _numStrips;
--height;
} while (--b && height);
} else {
do {
*dst = *src++;
dst += _numStrips;
--height;
} while (--b && height);
}
}
}
void Gdi::decompressMaskImgOr(byte *dst, const byte *src, int height) const {
byte b, c;
while (height) {
b = *src++;
if (b & 0x80) {
b &= 0x7F;
c = *src++;
do {
*dst |= c;
dst += _numStrips;
--height;
} while (--b && height);
} else {
do {
*dst |= *src++;
dst += _numStrips;
--height;
} while (--b && height);
}
}
}
void Gdi::drawStripC64Background(byte *dst, int dstPitch, int stripnr, int height) {
int charIdx;
height /= 8;
for (int y = 0; y < height; y++) {
_C64Colors[3] = (_C64ColorMap[y + stripnr * height] & 7);
// Check for room color change in V1 zak
if (_roomPalette[0] == 255) {
_C64Colors[2] = _roomPalette[2];
_C64Colors[1] = _roomPalette[1];
}
charIdx = _C64PicMap[y + stripnr * height] * 8;
for (int i = 0; i < 8; i++) {
byte c = _C64CharMap[charIdx + i];
dst[0] = dst[1] = _C64Colors[(c >> 6) & 3];
dst[2] = dst[3] = _C64Colors[(c >> 4) & 3];
dst[4] = dst[5] = _C64Colors[(c >> 2) & 3];
dst[6] = dst[7] = _C64Colors[(c >> 0) & 3];
dst += dstPitch;
}
}
}
void Gdi::drawStripC64Object(byte *dst, int dstPitch, int stripnr, int width, int height) {
int charIdx;
height /= 8;
width /= 8;
for (int y = 0; y < height; y++) {
_C64Colors[3] = (_C64ObjectMap[(y + height) * width + stripnr] & 7);
charIdx = _C64ObjectMap[y * width + stripnr] * 8;
for (int i = 0; i < 8; i++) {
byte c = _C64CharMap[charIdx + i];
dst[0] = dst[1] = _C64Colors[(c >> 6) & 3];
dst[2] = dst[3] = _C64Colors[(c >> 4) & 3];
dst[4] = dst[5] = _C64Colors[(c >> 2) & 3];
dst[6] = dst[7] = _C64Colors[(c >> 0) & 3];
dst += dstPitch;
}
}
}
void Gdi::drawStripC64Mask(byte *dst, int stripnr, int width, int height) const {
int maskIdx;
height /= 8;
width /= 8;
for (int y = 0; y < height; y++) {
if (_C64ObjectMode)
maskIdx = _C64ObjectMap[(y + 2 * height) * width + stripnr] * 8;
else
maskIdx = _C64MaskMap[y + stripnr * height] * 8;
for (int i = 0; i < 8; i++) {
byte c = _C64MaskChar[maskIdx + i];
// V1/C64 masks are inverted compared to what ScummVM expects
*dst = c ^ 0xFF;
dst += _numStrips;
}
}
}
void Gdi::decodeC64Gfx(const byte *src, byte *dst, int size) const {
int x, z;
byte color, run, common[4];
for (z = 0; z < 4; z++) {
common[z] = *src++;
}
x = 0;
while (x < size) {
run = *src++;
if (run & 0x80) {
color = common[(run >> 5) & 3];
run &= 0x1F;
for (z = 0; z <= run; z++) {
dst[x++] = color;
}
} else if (run & 0x40) {
run &= 0x3F;
color = *src++;
for (z = 0; z <= run; z++) {
dst[x++] = color;
}
} else {
for (z = 0; z <= run; z++) {
dst[x++] = *src++;
}
}
}
}
/**
* Create and fill a table with offsets to the graphic and mask strips in the
* given V2 EGA bitmap.
* @param src the V2 EGA bitmap
* @param width the width of the bitmap
* @param height the height of the bitmap
* @param table the strip table to fill
* @return filled strip table
*/
StripTable *Gdi::generateStripTable(const byte *src, int width, int height, StripTable *table) const {
// If no strip table was given to use, allocate a new one
if (table == 0)
table = (StripTable *)calloc(1, sizeof(StripTable));
const byte *bitmapStart = src;
byte color = 0, data = 0;
int x, y, length = 0;
byte run = 1;
// Decode the graphics strips, and memorize the run/color values
// as well as the byte offset.
for (x = 0 ; x < width; x++) {
if ((x % 8) == 0) {
assert(x / 8 < 160);
table->run[x / 8] = run;
table->color[x / 8] = color;
table->offsets[x / 8] = src - bitmapStart;
}
for (y = 0; y < height; y++) {
if (--run == 0) {
data = *src++;
if (data & 0x80) {
run = data & 0x7f;
} else {
run = data >> 4;
}
if (run == 0) {
run = *src++;
}
color = data & 0x0f;
}
}
}
// The mask data follows immediately after the graphics.
x = 0;
y = height;
width /= 8;
for (;;) {
length = *src++;
const byte runFlag = length & 0x80;
if (runFlag) {
length &= 0x7f;
data = *src++;
}
do {
if (!runFlag)
data = *src++;
if (y == height) {
assert(x < 120);
table->zoffsets[x] = src - bitmapStart - 1;
table->zrun[x] = length | runFlag;
}
if (--y == 0) {
if (--width == 0)
return table;
x++;
y = height;
}
} while (--length);
}
return table;
}
void Gdi::drawStripEGA(byte *dst, int dstPitch, const byte *src, int height) const {
byte color = 0;
int run = 0, x = 0, y = 0, z;
while (x < 8) {
color = *src++;
if (color & 0x80) {
run = color & 0x3f;
if (color & 0x40) {
color = *src++;
if (run == 0) {
run = *src++;
}
for (z = 0; z < run; z++) {
*(dst + y * dstPitch + x) = (z & 1) ? _roomPalette[color & 0xf] : _roomPalette[color >> 4];
y++;
if (y >= height) {
y = 0;
x++;
}
}
} else {
if (run == 0) {
run = *src++;
}
for (z = 0; z < run; z++) {
*(dst + y * dstPitch + x) = *(dst + y * dstPitch + x - 1);
y++;
if (y >= height) {
y = 0;
x++;
}
}
}
} else {
run = color >> 4;
if (run == 0) {
run = *src++;
}
for (z = 0; z < run; z++) {
*(dst + y * dstPitch + x) = _roomPalette[color & 0xf];
y++;
if (y >= height) {
y = 0;
x++;
}
}
}
}
}
#define READ_BIT (shift--, dataBit = data & 1, data >>= 1, dataBit)
#define FILL_BITS(n) do { \
if (shift < n) { \
data |= *src++ << shift; \
shift += 8; \
} \
} while (0)
// NOTE: drawStripHE is actually very similar to drawStripComplex
void Gdi::drawStripHE(byte *dst, int dstPitch, const byte *src, int width, int height, const bool transpCheck) const {
static const int delta_color[] = { -4, -3, -2, -1, 1, 2, 3, 4 };
uint32 dataBit, data;
byte color;
int shift;
color = *src++;
data = READ_LE_UINT24(src);
src += 3;
shift = 24;
int x = width;
while (1) {
if (!transpCheck || color != _transparentColor)
*dst = _roomPalette[color];
dst++;
--x;
if (x == 0) {
x = width;
dst += dstPitch - width;
--height;
if (height == 0)
return;
}
FILL_BITS(1);
if (READ_BIT) {
FILL_BITS(1);
if (READ_BIT) {
FILL_BITS(3);
color += delta_color[data & 7];
shift -= 3;
data >>= 3;
} else {
FILL_BITS(_decomp_shr);
color = data & _decomp_mask;
shift -= _decomp_shr;
data >>= _decomp_shr;
}
}
}
}
#undef READ_BIT
#undef FILL_BITS
void Gdi::drawStrip3DO(byte *dst, int dstPitch, const byte *src, int height, const bool transpCheck) const {
if (height == 0)
return;
int decSize = height * 8;
int curSize = 0;
do {
uint8 data = *src++;
uint8 rle = data & 1;
int len = (data >> 1) + 1;
len = MIN(decSize, len);
decSize -= len;
if (!rle) {
for (; len > 0; len--, src++, dst++) {
if (!transpCheck || *src != _transparentColor)
*dst = _roomPalette[*src];
curSize++;
if (!(curSize & 7))
dst += dstPitch - 8; // Next row
}
} else {
byte color = *src++;
for (; len > 0; len--, dst++) {
if (!transpCheck || color != _transparentColor)
*dst = _roomPalette[color];
curSize++;
if (!(curSize & 7))
dst += dstPitch - 8; // Next row
}
}
} while (decSize > 0);
}
#define READ_BIT (cl--, bit = bits & 1, bits >>= 1, bit)
#define FILL_BITS do { \
if (cl <= 8) { \
bits |= (*src++ << cl); \
cl += 8; \
} \
} while (0)
void Gdi::drawStripComplex(byte *dst, int dstPitch, const byte *src, int height, const bool transpCheck) const {
byte color = *src++;
uint bits = *src++;
byte cl = 8;
byte bit;
byte incm, reps;
do {
int x = 8;
do {
FILL_BITS;
if (!transpCheck || color != _transparentColor)
*dst = _roomPalette[color];
dst++;
againPos:
if (!READ_BIT) {
} else if (!READ_BIT) {
FILL_BITS;
color = bits & _decomp_mask;
bits >>= _decomp_shr;
cl -= _decomp_shr;
} else {
incm = (bits & 7) - 4;
cl -= 3;
bits >>= 3;
if (incm) {
color += incm;
} else {
FILL_BITS;
reps = bits & 0xFF;
do {
if (!--x) {
x = 8;
dst += dstPitch - 8;
if (!--height)
return;
}
if (!transpCheck || color != _transparentColor)
*dst = _roomPalette[color];
dst++;
} while (--reps);
bits >>= 8;
bits |= (*src++) << (cl - 8);
goto againPos;
}
}
} while (--x);
dst += dstPitch - 8;
} while (--height);
}
void Gdi::drawStripBasicH(byte *dst, int dstPitch, const byte *src, int height, const bool transpCheck) const {
byte color = *src++;
uint bits = *src++;
byte cl = 8;
byte bit;
int8 inc = -1;
do {
int x = 8;
do {
FILL_BITS;
if (!transpCheck || color != _transparentColor)
*dst = _roomPalette[color];
dst++;
if (!READ_BIT) {
} else if (!READ_BIT) {
FILL_BITS;
color = bits & _decomp_mask;
bits >>= _decomp_shr;
cl -= _decomp_shr;
inc = -1;
} else if (!READ_BIT) {
color += inc;
} else {
inc = -inc;
color += inc;
}
} while (--x);
dst += dstPitch - 8;
} while (--height);
}
void Gdi::drawStripBasicV(byte *dst, int dstPitch, const byte *src, int height, const bool transpCheck) const {
byte color = *src++;
uint bits = *src++;
byte cl = 8;
byte bit;
int8 inc = -1;
int x = 8;
do {
int h = height;
do {
FILL_BITS;
if (!transpCheck || color != _transparentColor)
*dst = _roomPalette[color];
dst += dstPitch;
if (!READ_BIT) {
} else if (!READ_BIT) {
FILL_BITS;
color = bits & _decomp_mask;
bits >>= _decomp_shr;
cl -= _decomp_shr;
inc = -1;
} else if (!READ_BIT) {
color += inc;
} else {
inc = -inc;
color += inc;
}
} while (--h);
dst -= _vertStripNextInc;
} while (--x);
}
#undef READ_BIT
#undef FILL_BITS
/* Ender - Zak256/Indy256 decoders */
#define READ_BIT_256 \
do { \
if ((mask <<= 1) == 256) { \
buffer = *src++; \
mask = 1; \
} \
bits = ((buffer & mask) != 0); \
} while (0)
#define READ_N_BITS(n, c) \
do { \
c = 0; \
for (int b = 0; b < n; b++) { \
READ_BIT_256; \
c += (bits << b); \
} \
} while (0)
#define NEXT_ROW \
do { \
dst += dstPitch; \
if (--h == 0) { \
if (!--x) \
return; \
dst -= _vertStripNextInc; \
h = height; \
} \
} while (0)
void Gdi::unkDecode7(byte *dst, int dstPitch, const byte *src, int height) const {
if (_vm->_features & GF_OLD256) {
uint h = height;
int x = 8;
for (;;) {
*dst = *src++;
NEXT_ROW;
}
return;
}
do {
#if defined(SCUMM_NEED_ALIGNMENT)
memcpy(dst, src, 8);
#else
((uint32 *)dst)[0] = ((const uint32 *)src)[0];
((uint32 *)dst)[1] = ((const uint32 *)src)[1];
#endif
dst += dstPitch;
src += 8;
} while (--height);
}
void Gdi::unkDecode8(byte *dst, int dstPitch, const byte *src, int height) const {
uint h = height;
int x = 8;
for (;;) {
uint run = (*src++) + 1;
byte color = *src++;
do {
*dst = _roomPalette[color];
NEXT_ROW;
} while (--run);
}
}
void Gdi::unkDecode9(byte *dst, int dstPitch, const byte *src, int height) const {
byte c, bits, color, run;
int i;
uint buffer = 0, mask = 128;
int h = height;
i = run = 0;
int x = 8;
for (;;) {
READ_N_BITS(4, c);
switch (c >> 2) {
case 0:
READ_N_BITS(4, color);
for (i = 0; i < ((c & 3) + 2); i++) {
*dst = _roomPalette[run * 16 + color];
NEXT_ROW;
}
break;
case 1:
for (i = 0; i < ((c & 3) + 1); i++) {
READ_N_BITS(4, color);
*dst = _roomPalette[run * 16 + color];
NEXT_ROW;
}
break;
case 2:
READ_N_BITS(4, run);
break;
}
}
}
void Gdi::unkDecode10(byte *dst, int dstPitch, const byte *src, int height) const {
int i;
byte local_palette[256], numcolors = *src++;
uint h = height;
for (i = 0; i < numcolors; i++)
local_palette[i] = *src++;
int x = 8;
for (;;) {
byte color = *src++;
if (color < numcolors) {
*dst = _roomPalette[local_palette[color]];
NEXT_ROW;
} else {
uint run = color - numcolors + 1;
color = *src++;
do {
*dst = _roomPalette[color];
NEXT_ROW;
} while (--run);
}
}
}
void Gdi::unkDecode11(byte *dst, int dstPitch, const byte *src, int height) const {
int bits, i;
uint buffer = 0, mask = 128;
byte inc = 1, color = *src++;
int x = 8;
do {
int h = height;
do {
*dst = _roomPalette[color];
dst += dstPitch;
for (i = 0; i < 3; i++) {
READ_BIT_256;
if (!bits)
break;
}
switch (i) {
case 1:
inc = -inc;
color -= inc;
break;
case 2:
color -= inc;
break;
case 3:
inc = 1;
READ_N_BITS(8, color);
break;
}
} while (--h);
dst -= _vertStripNextInc;
} while (--x);
}
#undef NEXT_ROW
#undef READ_BIT_256
#pragma mark -
#pragma mark --- Transition effects ---
#pragma mark -
void ScummEngine::fadeIn(int effect) {
updatePalette();
switch (effect) {
case 0:
// seems to do nothing
break;
case 1:
case 2:
case 3:
case 4:
case 5:
// Some of the transition effects won't work properly unless
// the screen is marked as clean first. At first I thought I
// could safely do this every time fadeIn() was called, but
// that broke the FOA intro. Probably other things as well.
//
// Hopefully it's safe to do it at this point, at least.
virtscr[0].setDirtyRange(0, 0);
transitionEffect(effect - 1);
break;
case 128:
unkScreenEffect6();
break;
case 129:
break;
case 130:
case 131:
case 132:
case 133:
scrollEffect(133 - effect);
break;
case 134:
dissolveEffect(1, 1);
break;
case 135:
unkScreenEffect5(1);
break;
default:
warning("Unknown screen effect, %d", effect);
}
_screenEffectFlag = true;
}
void ScummEngine::fadeOut(int effect) {
VirtScreen *vs = &virtscr[0];
vs->setDirtyRange(0, 0);
if (!(_features & GF_NEW_CAMERA))
camera._last.x = camera._cur.x;
if (_switchRoomEffect >= 130 && _switchRoomEffect <= 133) {
// We're going to use scrollEffect(), so we'll need a copy of
// the current VirtScreen zero.
free(_scrollBuffer);
_scrollBuffer = (byte *) malloc(vs->h * vs->pitch);
memcpy(_scrollBuffer, vs->getPixels(0, 0), vs->h * vs->pitch);
}
if (_screenEffectFlag && effect != 0) {
// Fill screen 0 with black
memset(vs->getPixels(0, 0), 0, vs->pitch * vs->h);
// Fade to black with the specified effect, if any.
switch (effect) {
case 1:
case 2:
case 3:
case 4:
case 5:
transitionEffect(effect - 1);
break;
case 128:
unkScreenEffect6();
break;
case 129:
// Just blit screen 0 to the display (i.e. display will be black)
vs->setDirtyRange(0, vs->h);
updateDirtyScreen(kMainVirtScreen);
break;
case 134:
dissolveEffect(1, 1);
break;
case 135:
unkScreenEffect5(1);
break;
default:
warning("fadeOut: default case %d", effect);
}
}
// Update the palette at the end (once we faded to black) to avoid
// some nasty effects when the palette is changed
updatePalette();
_screenEffectFlag = false;
}
/**
* Perform a transition effect. There are four different effects possible:
* 0: Iris effect
* 1: Box wipe (a black box expands from the upper-left corner to the lower-right corner)
* 2: Box wipe (a black box expands from the lower-right corner to the upper-left corner)
* 3: Inverse box wipe
* All effects operate on 8x8 blocks of the screen. These blocks are updated
* in a certain order; the exact order determines how the effect appears to the user.
* @param a the transition effect to perform
*/
void ScummEngine::transitionEffect(int a) {
int delta[16]; // Offset applied during each iteration
int tab_2[16];
int i, j;
int bottom;
int l, t, r, b;
const int height = MIN((int)virtscr[0].h, _screenHeight);
for (i = 0; i < 16; i++) {
delta[i] = transitionEffects[a].deltaTable[i];
j = transitionEffects[a].stripTable[i];
if (j == 24)
j = height / 8 - 1;
tab_2[i] = j;
}
bottom = height / 8;
for (j = 0; j < transitionEffects[a].numOfIterations; j++) {
for (i = 0; i < 4; i++) {
l = tab_2[i * 4];
t = tab_2[i * 4 + 1];
r = tab_2[i * 4 + 2];
b = tab_2[i * 4 + 3];
if (t == b) {
while (l <= r) {
if (l >= 0 && l < gdi._numStrips && t < bottom) {
virtscr[0].tdirty[l] = _screenTop + t * 8;
virtscr[0].bdirty[l] = _screenTop + (b + 1) * 8;
}
l++;
}
} else {
if (l < 0 || l >= gdi._numStrips || b <= t)
continue;
if (b > bottom)
b = bottom;
if (t < 0)
t = 0;
virtscr[0].tdirty[l] = _screenTop + t * 8;
virtscr[0].bdirty[l] = _screenTop + (b + 1) * 8;
}
updateDirtyScreen(kMainVirtScreen);
}
for (i = 0; i < 16; i++)
tab_2[i] += delta[i];
// Draw the current state to the screen and wait half a sec so the user
// can watch the effect taking place.
_system->updateScreen();
waitForTimer(30);
}
}
/**
* Update width*height areas of the screen, in random order, until the whole
* screen has been updated. For instance:
*
* dissolveEffect(1, 1) produces a pixel-by-pixel dissolve
* dissolveEffect(8, 8) produces a square-by-square dissolve
* dissolveEffect(virtsrc[0].width, 1) produces a line-by-line dissolve
*/
void ScummEngine::dissolveEffect(int width, int height) {
#ifdef __PALM_OS__
// Remove this dissolve effect for now on PalmOS since it is a bit
// too slow using 68k emulation
if (width == 1 && height == 1) {
waitForTimer(30);
return;
}
#endif
VirtScreen *vs = &virtscr[0];
int *offsets;
int blits_before_refresh, blits;
int x, y;
int w, h;
int i;
// There's probably some less memory-hungry way of doing this. But
// since we're only dealing with relatively small images, it shouldn't
// be too bad.
w = vs->w / width;
h = vs->h / height;
// When used correctly, vs->width % width and vs->height % height
// should both be zero, but just to be safe...
if (vs->w % width)
w++;
if (vs->h % height)
h++;
offsets = (int *) malloc(w * h * sizeof(int));
if (offsets == NULL) {
warning("dissolveEffect: out of memory");
return;
}
// Create a permutation of offsets into the frame buffer
if (width == 1 && height == 1) {
// Optimized case for pixel-by-pixel dissolve
for (i = 0; i < vs->w * vs->h; i++)
offsets[i] = i;
for (i = 1; i < w * h; i++) {
int j;
j = _rnd.getRandomNumber(i - 1);
offsets[i] = offsets[j];
offsets[j] = i;
}
} else {
int *offsets2;
for (i = 0, x = 0; x < vs->w; x += width)
for (y = 0; y < vs->h; y += height)
offsets[i++] = y * vs->pitch + x;
offsets2 = (int *) malloc(w * h * sizeof(int));
if (offsets2 == NULL) {
warning("dissolveEffect: out of memory");
free(offsets);
return;
}
memcpy(offsets2, offsets, w * h * sizeof(int));
for (i = 1; i < w * h; i++) {
int j;
j = _rnd.getRandomNumber(i - 1);
offsets[i] = offsets[j];
offsets[j] = offsets2[i];
}
free(offsets2);
}
// Blit the image piece by piece to the screen. The idea here is that
// the whole update should take about a quarter of a second, assuming
// most of the time is spent in waitForTimer(). It looks good to me,
// but might still need some tuning.
blits = 0;
blits_before_refresh = (3 * w * h) / 25;
// Speed up the effect for CD Loom since it uses it so often. I don't
// think the original had any delay at all, so on modern hardware it
// wasn't even noticeable.
if (_gameId == GID_LOOM256)
blits_before_refresh *= 2;
for (i = 0; i < w * h; i++) {
x = offsets[i] % vs->pitch;
y = offsets[i] / vs->pitch;
_system->copyRectToScreen(vs->getPixels(x, y), vs->pitch, x, y + vs->topline, width, height);
if (++blits >= blits_before_refresh) {
blits = 0;
_system->updateScreen();
waitForTimer(30);
}
}
free(offsets);
if (blits != 0) {
_system->updateScreen();
waitForTimer(30);
}
}
void ScummEngine::scrollEffect(int dir) {
// It is at least technically possible that this function will be
// called without _scrollBuffer having been set up, but will it ever
// happen? I don't know.
if (!_scrollBuffer)
warning("scrollEffect: No scroll buffer. This may look bad");
VirtScreen *vs = &virtscr[0];
int x, y;
int step;
if ((dir == 0) || (dir == 1))
step = vs->h;
else
step = vs->w;
step = (step * kPictureDelay) / kScrolltime;
switch (dir) {
case 0:
//up
y = step;
while (y < vs->h) {
_system->copyRectToScreen(vs->getPixels(0, 0),
vs->pitch,
0, vs->h - y,
vs->w, y);
if (_scrollBuffer)
_system->copyRectToScreen(_scrollBuffer + y * vs->w,
vs->pitch,
0, 0,
vs->w, vs->h - y);
_system->updateScreen();
waitForTimer(kPictureDelay);
y += step;
}
break;
case 1:
// down
y = step;
while (y < vs->h) {
_system->copyRectToScreen(vs->getPixels(0, vs->h - y),
vs->pitch,
0, 0,
vs->w, y);
if (_scrollBuffer)
_system->copyRectToScreen(_scrollBuffer,
vs->pitch,
0, y,
vs->w, vs->h - y);
_system->updateScreen();
waitForTimer(kPictureDelay);
y += step;
}
break;
case 2:
// left
x = step;
while (x < vs->w) {
_system->copyRectToScreen(vs->getPixels(0, 0),
vs->pitch,
vs->w - x, 0,
x, vs->h);
if (_scrollBuffer)
_system->copyRectToScreen(_scrollBuffer + x,
vs->pitch,
0, 0,
vs->w - x, vs->h);
_system->updateScreen();
waitForTimer(kPictureDelay);
x += step;
}
break;
case 3:
// right
x = step;
while (x < vs->w) {
_system->copyRectToScreen(vs->getPixels(vs->w - x, 0),
vs->pitch,
0, 0,
x, vs->h);
if (_scrollBuffer)
_system->copyRectToScreen(_scrollBuffer,
vs->pitch,
x, 0,
vs->w - x, vs->h);
_system->updateScreen();
waitForTimer(kPictureDelay);
x += step;
}
break;
}
free(_scrollBuffer);
_scrollBuffer = NULL;
}
void ScummEngine::unkScreenEffect6() {
// CD Loom (but not EGA Loom!) uses a more fine-grained dissolve
if (_gameId == GID_LOOM256)
dissolveEffect(1, 1);
else
dissolveEffect(8, 4);
}
void ScummEngine::unkScreenEffect5(int a) {
// unkScreenEffect5(0), which is used by FOA during the opening
// cutscene when Indy opens the small statue, has been replaced by
// dissolveEffect(1, 1).
//
// I still don't know what unkScreenEffect5(1) is supposed to do.
// FIXME: not implemented
warning("stub unkScreenEffect(%d)", a);
}
} // End of namespace Scumm
#ifdef __PALM_OS__
#include "scumm_globals.h"
_GINIT(Gfx)
_GSETPTR(Scumm::transitionEffects, GBVARS_TRANSITIONEFFECTS_INDEX, Scumm::TransitionEffect, GBVARS_SCUMM)
_GEND
_GRELEASE(Gfx)
_GRELEASEPTR(GBVARS_TRANSITIONEFFECTS_INDEX, GBVARS_SCUMM)
_GEND
#endif
Reference in New Issue View Git Blame Copy Permalink