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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 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
// Misc. graphics routines
#include "saga/saga.h"
#include "saga/gfx.h"
#include "saga/interface.h"
#include "saga/resource.h"
#include "saga/scene.h"
#include "saga/render.h"
#include "common/system.h"
#include "graphics/cursorman.h"
#include "engines/util.h"
namespace Saga {
#define RID_IHNM_DEFAULT_PALETTE 1
#define RID_IHNM_HOURGLASS_CURSOR 11 // not in demo
Gfx::Gfx(SagaEngine *vm, OSystem *system, int width, int height) : _vm(vm), _system(system) {
initGraphics(width, height, width > 320);
debug(5, "Init screen %dx%d", width, height);
// Convert surface data to R surface data
_backBuffer.create(width, height, 1);
// Start with the cursor shown. It will be hidden before the intro, if
// there is an intro. (With boot params, there may not be.)
setCursor(kCursorNormal);
showCursor(true);
}
Gfx::~Gfx() {
_backBuffer.free();
}
#ifdef SAGA_DEBUG
void Surface::drawPalette() {
int x;
int y;
int color = 0;
Rect palRect;
for (y = 0; y < 16; y++) {
palRect.top = (y * 8) + 4;
palRect.bottom = palRect.top + 8;
for (x = 0; x < 16; x++) {
palRect.left = (x * 8) + 4;
palRect.right = palRect.left + 8;
drawRect(palRect, color);
color++;
}
}
}
#endif
// * Copies a rectangle from a raw 8 bit pixel buffer to the specified surface.
// - The surface must match the logical dimensions of the buffer exactly.
void Surface::blit(const Common::Rect &destRect, const byte *sourceBuffer) {
const byte *readPointer;
byte *writePointer;
int row;
ClipData clipData;
clipData.sourceRect.left = 0;
clipData.sourceRect.top = 0;
clipData.sourceRect.right = destRect.width();
clipData.sourceRect.bottom = destRect.height();
clipData.destPoint.x = destRect.left;
clipData.destPoint.y = destRect.top;
clipData.destRect.left = 0;
clipData.destRect.right = w;
clipData.destRect.top = 0;
clipData.destRect.bottom = h;
if (!clipData.calcClip()) {
return;
}
// Transfer buffer data to surface
readPointer = (sourceBuffer + clipData.drawSource.x) +
(clipData.sourceRect.right * clipData.drawSource.y);
writePointer = ((byte *)pixels + clipData.drawDest.x) + (pitch * clipData.drawDest.y);
for (row = 0; row < clipData.drawHeight; row++) {
memcpy(writePointer, readPointer, clipData.drawWidth);
writePointer += pitch;
readPointer += clipData.sourceRect.right;
}
}
void Surface::drawPolyLine(const Point *points, int count, int color) {
int i;
if (count >= 3) {
for (i = 1; i < count; i++) {
drawLine(points[i].x, points[i].y, points[i - 1].x, points[i - 1].y, color);
}
drawLine(points[count - 1].x, points[count - 1].y, points->x, points->y, color);
}
}
// Dissolve one image with another. If flags is set to 1, do zero masking.
void Surface::transitionDissolve(const byte *sourceBuffer, const Common::Rect &sourceRect, int flags, double percent) {
#define XOR_MASK 0xB400;
int pixelcount = w * h;
int seqlimit = (int)(65535 * percent);
int seq = 1;
int i, x1, y1;
byte color;
for (i = 0; i < seqlimit; i++) {
if (seq & 1) {
seq = (seq >> 1) ^ XOR_MASK;
} else {
seq = seq >> 1;
}
if (seq == 1) {
return;
}
if (seq >= pixelcount) {
continue;
} else {
x1 = seq % w;
y1 = seq / w;
if (sourceRect.contains(x1, y1)) {
color = sourceBuffer[(x1-sourceRect.left) + sourceRect.width()*(y1-sourceRect.top)];
if (flags == 0 || color)
((byte*)pixels)[seq] = color;
}
}
}
}
void Gfx::initPalette() {
if (_vm->getGameId() == GID_ITE)
return;
ResourceContext *resourceContext = _vm->_resource->getContext(GAME_RESOURCEFILE);
if (resourceContext == NULL) {
error("Resource::loadGlobalResources() resource context not found");
}
byte *resourcePointer;
size_t resourceLength;
_vm->_resource->loadResource(resourceContext, RID_IHNM_DEFAULT_PALETTE,
resourcePointer, resourceLength);
MemoryReadStream metaS(resourcePointer, resourceLength);
for (int i = 0; i < 256; i++) {
_globalPalette[i].red = metaS.readByte();
_globalPalette[i].green = metaS.readByte();
_globalPalette[i].blue = metaS.readByte();
}
free(resourcePointer);
setPalette(_globalPalette, true);
}
void Gfx::setPalette(const PalEntry *pal, bool full) {
int i;
byte *ppal;
int from, numcolors;
if (_vm->getGameId() == GID_ITE || full) {
from = 0;
numcolors = PAL_ENTRIES;
} else {
from = 0;
numcolors = 248;
}
for (i = 0, ppal = &_currentPal[from * 4]; i < numcolors; i++, ppal += 4) {
ppal[0] = _globalPalette[i].red = pal[i].red;
ppal[1] = _globalPalette[i].green = pal[i].green;
ppal[2] = _globalPalette[i].blue = pal[i].blue;
ppal[3] = 0;
}
// Color 0 should always be black in IHNM
if (_vm->getGameId() == GID_IHNM)
memset(&_currentPal[0 * 4], 0, 4);
// Make 256th color black. See bug #1256368
if ((_vm->getPlatform() == Common::kPlatformMacintosh) && !_vm->_scene->isInIntro())
memset(&_currentPal[255 * 4], 0, 4);
_system->setPalette(_currentPal, 0, PAL_ENTRIES);
}
void Gfx::setPaletteColor(int n, int r, int g, int b) {
bool update = false;
// This function may get called a lot. To avoid forcing full-screen
// updates, only update the palette if the color actually changes.
if (_currentPal[4 * n + 0] != r) {
_currentPal[4 * n + 0] = _globalPalette[n].red = r;
update = true;
}
if (_currentPal[4 * n + 1] != g) {
_currentPal[4 * n + 1] = _globalPalette[n].green = g;
update = true;
}
if (_currentPal[4 * n + 2] != b) {
_currentPal[4 * n + 2] = _globalPalette[n].blue = b;
update = true;
}
if (_currentPal[4 * n + 3] != 0) {
_currentPal[4 * n + 3] = 0;
update = true;
}
if (update)
_system->setPalette(_currentPal, n, 1);
}
void Gfx::getCurrentPal(PalEntry *src_pal) {
int i;
byte *ppal;
for (i = 0, ppal = _currentPal; i < PAL_ENTRIES; i++, ppal += 4) {
src_pal[i].red = ppal[0];
src_pal[i].green = ppal[1];
src_pal[i].blue = ppal[2];
}
}
void Gfx::palToBlack(PalEntry *srcPal, double percent) {
int i;
//int fade_max = 255;
int new_entry;
byte *ppal;
PalEntry *palE;
int from, numcolors;
double fpercent;
if (_vm->getGameId() == GID_ITE) {
from = 0;
numcolors = PAL_ENTRIES;
} else {
from = 0;
numcolors = 248;
}
if (percent > 1.0) {
percent = 1.0;
}
// Exponential fade
fpercent = percent * percent;
fpercent = 1.0 - fpercent;
// Use the correct percentage change per frame for each palette entry
for (i = 0, ppal = _currentPal; i < PAL_ENTRIES; i++, ppal += 4) {
if (i < from || i >= from + numcolors)
palE = &_globalPalette[i];
else
palE = &srcPal[i];
new_entry = (int)(palE->red * fpercent);
if (new_entry < 0) {
ppal[0] = 0;
} else {
ppal[0] = (byte) new_entry;
}
new_entry = (int)(palE->green * fpercent);
if (new_entry < 0) {
ppal[1] = 0;
} else {
ppal[1] = (byte) new_entry;
}
new_entry = (int)(palE->blue * fpercent);
if (new_entry < 0) {
ppal[2] = 0;
} else {
ppal[2] = (byte) new_entry;
}
ppal[3] = 0;
}
// Color 0 should always be black in IHNM
if (_vm->getGameId() == GID_IHNM)
memset(&_currentPal[0 * 4], 0, 4);
// Make 256th color black. See bug #1256368
if ((_vm->getPlatform() == Common::kPlatformMacintosh) && !_vm->_scene->isInIntro())
memset(&_currentPal[255 * 4], 0, 4);
_system->setPalette(_currentPal, 0, PAL_ENTRIES);
}
void Gfx::blackToPal(PalEntry *srcPal, double percent) {
int new_entry;
double fpercent;
byte *ppal;
int i;
PalEntry *palE;
int from, numcolors;
if (_vm->getGameId() == GID_ITE) {
from = 0;
numcolors = PAL_ENTRIES;
} else {
from = 0;
numcolors = 248;
}
if (percent > 1.0) {
percent = 1.0;
}
// Exponential fade
fpercent = percent * percent;
// Use the correct percentage change per frame for each palette entry
for (i = 0, ppal = _currentPal; i < PAL_ENTRIES; i++, ppal += 4) {
if (i < from || i >= from + numcolors)
palE = &_globalPalette[i];
else
palE = &srcPal[i];
new_entry = (int)(palE->red * fpercent);
if (new_entry < 0) {
ppal[0] = 0;
} else {
ppal[0] = (byte)new_entry;
}
new_entry = (int)(palE->green * fpercent);
if (new_entry < 0) {
ppal[1] = 0;
} else {
ppal[1] = (byte) new_entry;
}
new_entry = (int)(palE->blue * fpercent);
if (new_entry < 0) {
ppal[2] = 0;
} else {
ppal[2] = (byte) new_entry;
}
ppal[3] = 0;
}
// Color 0 should always be black in IHNM
if (_vm->getGameId() == GID_IHNM)
memset(&_currentPal[0 * 4], 0, 4);
// Make 256th color black. See bug #1256368
if ((_vm->getPlatform() == Common::kPlatformMacintosh) && !_vm->_scene->isInIntro())
memset(&_currentPal[255 * 4], 0, 4);
_system->setPalette(_currentPal, 0, PAL_ENTRIES);
}
#ifdef ENABLE_IHNM
// Used in IHNM only
void Gfx::palFade(PalEntry *srcPal, int16 from, int16 to, int16 start, int16 numColors, double percent) {
int i;
int new_entry;
byte *ppal;
PalEntry *palE;
from = CLIP<int16>(from, 0, 256);
to = CLIP<int16>(to, 0, 256);
if (from == 0 || to == 0) {
// This case works like palToBlack or blackToPal, so no changes are needed
} else {
double x = from > to ? from / to : to / from;
percent /= x;
if (from < to)
percent += 1 / x;
}
percent = percent > 1.0 ? 1.0 : percent;
if (from > to)
percent = 1.0 - percent;
byte fadePal[PAL_ENTRIES * 4];
// Use the correct percentage change per frame for each palette entry
for (i = start, ppal = fadePal + start * 4; i < start + numColors; i++, ppal += 4) {
palE = &srcPal[i];
new_entry = (int)(palE->red * percent);
if (new_entry < 0) {
ppal[0] = 0;
} else {
ppal[0] = (byte) new_entry;
}
new_entry = (int)(palE->green * percent);
if (new_entry < 0) {
ppal[1] = 0;
} else {
ppal[1] = (byte) new_entry;
}
new_entry = (int)(palE->blue * percent);
if (new_entry < 0) {
ppal[2] = 0;
} else {
ppal[2] = (byte) new_entry;
}
ppal[3] = 0;
}
// Color 0 should always be black in IHNM
memset(&fadePal[0 * 4], 0, 4);
_system->setPalette(&fadePal[start * 4], start, numColors);
}
#endif
void Gfx::showCursor(bool state) {
// Don't show the mouse cursor in the non-interactive part of the IHNM demo
if (_vm->_scene->isNonInteractiveIHNMDemoPart())
state = false;
CursorMan.showMouse(state);
}
void Gfx::setCursor(CursorType cursorType) {
if (_vm->getGameId() == GID_ITE) {
// Set up the mouse cursor
const byte A = kITEColorLightGrey;
const byte B = kITEColorWhite;
const byte cursor_img[CURSOR_W * CURSOR_H] = {
0, 0, 0, A, 0, 0, 0,
0, 0, 0, A, 0, 0, 0,
0, 0, 0, A, 0, 0, 0,
A, A, A, B, A, A, A,
0, 0, 0, A, 0, 0, 0,
0, 0, 0, A, 0, 0, 0,
0, 0, 0, A, 0, 0, 0,
};
CursorMan.replaceCursor(cursor_img, CURSOR_W, CURSOR_H, 3, 3, 0);
} else {
uint32 resourceId;
switch (cursorType) {
case kCursorBusy:
if (!_vm->isIHNMDemo())
resourceId = RID_IHNM_HOURGLASS_CURSOR;
else
resourceId = (uint32)-1;
break;
default:
resourceId = (uint32)-1;
break;
}
byte *resource;
size_t resourceLength;
ByteArray image;
int width, height;
if (resourceId != (uint32)-1) {
ResourceContext *context = _vm->_resource->getContext(GAME_RESOURCEFILE);
_vm->_resource->loadResource(context, resourceId, resource, resourceLength);
_vm->decodeBGImage(resource, resourceLength, image, &width, &height);
} else {
resource = NULL;
width = height = 31;
image.resize(width * height);
for (int i = 0; i < 14; i++) {
image[15 * 31 + i] = 1;
image[15 * 31 + 30 - i] = 1;
image[i * 31 + 15] = 1;
image[(30 - i) * 31 + 15] = 1;
}
}
// Note: Hard-coded hotspot
CursorMan.replaceCursor(image.getBuffer(), width, height, 15, 15, 0);
free(resource);
}
}
bool hitTestPoly(const Point *points, unsigned int npoints, const Point& test_point) {
int yflag0;
int yflag1;
bool inside_flag = false;
unsigned int pt;
const Point *vtx0 = &points[npoints - 1];
const Point *vtx1 = &points[0];
yflag0 = (vtx0->y >= test_point.y);
for (pt = 0; pt < npoints; pt++, vtx1++) {
yflag1 = (vtx1->y >= test_point.y);
if (yflag0 != yflag1) {
if (((vtx1->y - test_point.y) * (vtx0->x - vtx1->x) >=
(vtx1->x - test_point.x) * (vtx0->y - vtx1->y)) == yflag1) {
inside_flag = !inside_flag;
}
}
yflag0 = yflag1;
vtx0 = vtx1;
}
return inside_flag;
}
// This method adds a dirty rectangle automatically
void Gfx::drawFrame(const Common::Point &p1, const Common::Point &p2, int color) {
Common::Rect rect(MIN(p1.x, p2.x), MIN(p1.y, p2.y), MAX(p1.x, p2.x) + 1, MAX(p1.y, p2.y) + 1);
_backBuffer.frameRect(rect, color);
_vm->_render->addDirtyRect(rect);
}
// This method adds a dirty rectangle automatically
void Gfx::drawRect(const Common::Rect &destRect, int color) {
_backBuffer.drawRect(destRect, color);
_vm->_render->addDirtyRect(destRect);
}
// This method adds a dirty rectangle automatically
void Gfx::fillRect(const Common::Rect &destRect, uint32 color) {
_backBuffer.fillRect(destRect, color);
_vm->_render->addDirtyRect(destRect);
}
// This method adds a dirty rectangle automatically
void Gfx::drawRegion(const Common::Rect &destRect, const byte *sourceBuffer) {
_backBuffer.blit(destRect, sourceBuffer);
_vm->_render->addDirtyRect(destRect);
}
// This method does not add a dirty rectangle automatically
void Gfx::drawBgRegion(const Common::Rect &destRect, const byte *sourceBuffer) {
_backBuffer.blit(destRect, sourceBuffer);
}
} // End of namespace Saga
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