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/* ScummVM - Scumm Interpreter
* Copyright (C) 2004-2005 The ScummVM project
*
* The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
*
* 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.
*
* $Header$
*
*/
// Misc. graphics routines
#include "saga/saga.h"
#include "saga/gfx.h"
#include "saga/interface.h"
#include "common/system.h"
namespace Saga {
Gfx::Gfx(SagaEngine *vm, OSystem *system, int width, int height, GameDetector &detector) : _vm(vm), _system(system) {
_system->beginGFXTransaction();
_vm->initCommonGFX(detector);
_system->initSize(width, height);
_system->endGFXTransaction();
debug(5, "Init screen %dx%d", width, height);
// Convert surface data to R surface data
_backBuffer.create(width, height, 1);
// Set module data
_init = 1;
// For now, always show the mouse cursor.
setCursor();
_system->showMouse(true);
}
Gfx::~Gfx() {
_backBuffer.free();
}
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++;
}
}
}
// * 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 if 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::setPalette(PalEntry *pal) {
int i;
byte *ppal;
for (i = 0, ppal = _currentPal; i < PAL_ENTRIES; i++, ppal += 4) {
ppal[0] = pal[i].red;
ppal[1] = pal[i].green;
ppal[2] = pal[i].blue;
ppal[3] = 0;
}
// Make 256th color black. See bug #1256368
if (_vm->getFeatures() & GF_MAC_RESOURCES)
memset(&_currentPal[255 * 4], 0, 4);
_system->setPalette(_currentPal, 0, PAL_ENTRIES);
}
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 *src_pal, double percent) {
int i;
//int fade_max = 255;
int new_entry;
byte *ppal;
double fpercent;
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) {
new_entry = (int)(src_pal[i].red * fpercent);
if (new_entry < 0) {
ppal[0] = 0;
} else {
ppal[0] = (byte) new_entry;
}
new_entry = (int)(src_pal[i].green * fpercent);
if (new_entry < 0) {
ppal[1] = 0;
} else {
ppal[1] = (byte) new_entry;
}
new_entry = (int)(src_pal[i].blue * fpercent);
if (new_entry < 0) {
ppal[2] = 0;
} else {
ppal[2] = (byte) new_entry;
}
ppal[3] = 0;
}
// Make 256th color black. See bug #1256368
if (_vm->getFeatures() & GF_MAC_RESOURCES)
memset(&_currentPal[255 * 4], 0, 4);
_system->setPalette(_currentPal, 0, PAL_ENTRIES);
}
void Gfx::blackToPal(PalEntry *src_pal, double percent) {
int new_entry;
double fpercent;
int color_delta;
int best_wdelta = 0;
int best_windex = 0;
int best_bindex = 0;
int best_bdelta = 1000;
byte *ppal;
int i;
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) {
new_entry = (int)(src_pal[i].red - src_pal[i].red * fpercent);
if (new_entry < 0) {
ppal[0] = 0;
} else {
ppal[0] = (byte) new_entry;
}
new_entry = (int)(src_pal[i].green - src_pal[i].green * fpercent);
if (new_entry < 0) {
ppal[1] = 0;
} else {
ppal[1] = (byte) new_entry;
}
new_entry = (int)(src_pal[i].blue - src_pal[i].blue * fpercent);
if (new_entry < 0) {
ppal[2] = 0;
} else {
ppal[2] = (byte) new_entry;
}
ppal[3] = 0;
}
// Find the best white and black color indices again
if (percent >= 1.0) {
for (i = 0, ppal = _currentPal; i < PAL_ENTRIES; i++, ppal += 4) {
color_delta = ppal[0];
color_delta += ppal[1];
color_delta += ppal[2];
if (color_delta < best_bdelta) {
best_bindex = i;
best_bdelta = color_delta;
}
if (color_delta > best_wdelta) {
best_windex = i;
best_wdelta = color_delta;
}
}
}
// Make 256th color black. See bug #1256368
if (_vm->getFeatures() & GF_MAC_RESOURCES)
memset(&_currentPal[255 * 4], 0, 4);
_system->setPalette(_currentPal, 0, PAL_ENTRIES);
}
void Gfx::showCursor(bool state) {
updateCursor();
g_system->showMouse(state);
}
void Gfx::setCursor() {
// 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,
};
_system->setMouseCursor(cursor_img, CURSOR_W, CURSOR_H, 3, 3, 0);
}
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;
}
} // End of namespace Saga
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