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-/* ScummVM - Scumm Interpreter
- * Copyright (C) 2004-2006 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., 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/resnames.h"
-#include "saga/rscfile.h"
-#include "saga/scene.h"
-#include "saga/stream.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;
-
- // 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();
-}
-
-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::initPalette() {
- if(_vm->getGameType() != GType_IHNM)
- 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->getGameType() != GType_IHNM || 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;
- }
-
- // 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->getGameType() != GType_IHNM) {
- 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;
- }
-
- // 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->getGameType() != GType_IHNM) {
- 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 - palE->red * fpercent);
-
- if (new_entry < 0) {
- ppal[0] = 0;
- } else {
- ppal[0] = (byte)new_entry;
- }
-
- new_entry = (int)(palE->green - palE->green * fpercent);
-
- if (new_entry < 0) {
- ppal[1] = 0;
- } else {
- ppal[1] = (byte) new_entry;
- }
-
- new_entry = (int)(palE->blue - palE->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->getPlatform() == Common::kPlatformMacintosh) && !_vm->_scene->isInIntro())
- memset(&_currentPal[255 * 4], 0, 4);
-
- _system->setPalette(_currentPal, 0, PAL_ENTRIES);
-}
-
-void Gfx::showCursor(bool state) {
- g_system->showMouse(state);
-}
-
-void Gfx::setCursor(CursorType cursorType) {
- if (_vm->getGameType() == GType_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,
- };
-
- _system->setMouseCursor(cursor_img, CURSOR_W, CURSOR_H, 3, 3, 0);
- } else {
- uint32 resourceId;
-
- switch (cursorType) {
- case kCursorBusy:
- resourceId = RID_IHNM_HOURGLASS_CURSOR;
- break;
- default:
- resourceId = (uint32)-1;
- break;
- }
-
- byte *resource;
- size_t resourceLength;
- byte *image;
- size_t imageLength;
- 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, &imageLength, &width, &height);
- } else {
- resource = NULL;
- width = height = 31;
- image = (byte *)calloc(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
- _system->setMouseCursor(image, width, height, 15, 15, 0);
-
- free(image);
- 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;
-}
-
-} // End of namespace Saga
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