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1073 lines
21 KiB
C++
1073 lines
21 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2005 The ScummVM project
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*
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* The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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// Misc. graphics routines
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// Line drawing code utilizes Bresenham's run-length slice algorithm
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// described in "Michael Abrash's Graphics Programming Black Book",
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// Coriolis Group Books, 1997
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#include "saga/saga.h"
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#include "saga/gfx.h"
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#include "common/system.h"
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namespace Saga {
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Gfx::Gfx(OSystem *system, int width, int height, GameDetector &detector) : _system(system) {
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SURFACE back_buf;
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_system->beginGFXTransaction();
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_vm->initCommonGFX(detector);
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_system->initSize(width, height);
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_system->endGFXTransaction();
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debug(0, "Init screen %dx%d", width, height);
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// Convert surface data to R surface data
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back_buf.pixels = calloc(1, width * height);
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back_buf.w = width;
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back_buf.h = height;
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back_buf.pitch = width;
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back_buf.bytesPerPixel = 1;
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back_buf.clip_rect.left = 0;
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back_buf.clip_rect.top = 0;
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back_buf.clip_rect.right = width;
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back_buf.clip_rect.bottom = height;
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// Set module data
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_back_buf = back_buf;
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_init = 1;
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_white_index = -1;
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_black_index = -1;
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// For now, always show the mouse cursor.
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setCursor(1);
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_system->showMouse(true);
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}
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/*
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~Gfx() {
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free(GfxModule.r_back_buf->pixels);
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}
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*/
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int drawPalette(SURFACE *dst_s) {
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int x;
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int y;
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int color = 0;
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Rect pal_rect;
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for (y = 0; y < 16; y++) {
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pal_rect.top = (y * 8) + 4;
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pal_rect.bottom = pal_rect.top + 8;
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for (x = 0; x < 16; x++) {
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pal_rect.left = (x * 8) + 4;
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pal_rect.right = pal_rect.left + 8;
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drawRect(dst_s, &pal_rect, color);
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color++;
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}
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}
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return 0;
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}
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// TODO: I've fixed at least one clipping bug here, but I have a feeling there
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// are several more.
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// * Copies a rectangle from a raw 8 bit pixel buffer to the specified surface.
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// The buffer is of width 'src_w' and height 'src_h'. The rectangle to be
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// copied is defined by 'src_rect'.
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// The rectangle is copied to the destination surface at point 'dst_pt'.
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// - If dst_pt is NULL, the buffer is rectangle is copied to the destination
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// origin.
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// - If src_rect is NULL, the entire buffer is copied./
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// - The surface must match the logical dimensions of the buffer exactly.
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// - Returns FAILURE on error
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int bufToSurface(SURFACE *ds, const byte *src, int src_w, int src_h,
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Rect *src_rect, Point *dst_pt) {
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const byte *read_p;
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byte *write_p;
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int row;
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Common::Rect s;
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int d_x, d_y;
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Common::Rect clip;
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int dst_off_x, dst_off_y;
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int src_off_x, src_off_y;
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int src_draw_w, src_draw_h;
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// Clamp source rectangle to source buffer
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if (src_rect != NULL) {
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src_rect->clip(src_w, src_h);
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s = *src_rect;
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} else {
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s.left = 0;
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s.top = 0;
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s.right = src_w;
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s.bottom = src_h;
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}
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if (s.width() <= 0 || s.height() <= 0) {
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// Empty or negative region
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return FAILURE;
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}
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// Get destination origin and clip rectangle
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if (dst_pt != NULL) {
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d_x = dst_pt->x;
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d_y = dst_pt->y;
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} else {
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d_x = 0;
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d_y = 0;
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}
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clip = ds->clip_rect;
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if (clip.left == clip.right) {
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clip.left = 0;
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clip.right = ds->w;
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}
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if (clip.top == clip.bottom) {
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clip.top = 0;
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clip.bottom = ds->h;
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}
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// Clip source rectangle to destination surface
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dst_off_x = d_x;
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dst_off_y = d_y;
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src_off_x = s.left;
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src_off_y = s.top;
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src_draw_w = s.width();
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src_draw_h = s.height();
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// Clip to left edge
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if (d_x < clip.left) {
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if (d_x <= (-src_draw_w)) {
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// dst rect completely off left edge
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return SUCCESS;
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}
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src_off_x += (clip.left - d_x);
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src_draw_w -= (clip.left - d_x);
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dst_off_x = clip.left;
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}
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// Clip to top edge
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if (d_y < clip.top) {
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if (d_y >= (-src_draw_h)) {
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// dst rect completely off top edge
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return SUCCESS;
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}
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src_off_y += (clip.top - d_y);
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src_draw_h -= (clip.top - d_y);
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dst_off_y = clip.top;
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}
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// Clip to right edge
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if (d_x >= clip.right) {
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// dst rect completely off right edge
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return SUCCESS;
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}
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if ((d_x + src_draw_w) > clip.right) {
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src_draw_w = clip.right - d_x;
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}
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// Clip to bottom edge
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if (d_y > clip.bottom) {
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// dst rect completely off bottom edge
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return SUCCESS;
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}
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if ((d_y + src_draw_h) > clip.bottom) {
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src_draw_h = clip.bottom - d_y;
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}
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// Transfer buffer data to surface
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read_p = (src + src_off_x) + (src_w * src_off_y);
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write_p = ((byte *)ds->pixels + dst_off_x) + (ds->pitch * dst_off_y);
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for (row = 0; row < src_draw_h; row++) {
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memcpy(write_p, read_p, src_draw_w);
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write_p += ds->pitch;
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read_p += src_w;
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}
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return SUCCESS;
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}
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int bufToBuffer(byte *dst_buf, int dst_w, int dst_h, const byte *src,
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int src_w, int src_h, Rect *src_rect, Point *dst_pt) {
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const byte *read_p;
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byte *write_p;
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int row;
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Common::Rect s;
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int d_x, d_y;
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Common::Rect clip;
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int dst_off_x, dst_off_y;
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int src_off_x, src_off_y;
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int src_draw_w, src_draw_h;
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// Clamp source rectangle to source buffer
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if (src_rect != NULL) {
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src_rect->clip(src_w, src_h);
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s.left = src_rect->left;
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s.top = src_rect->top;
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s.right = src_rect->right;
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s.bottom = src_rect->bottom;
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} else {
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s.left = 0;
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s.top = 0;
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s.right = src_w;
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s.bottom = src_h;
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}
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if (s.width() <= 0 || s.height() <= 0) {
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// Empty or negative region
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return FAILURE;
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}
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// Get destination origin and clip rectangle
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if (dst_pt != NULL) {
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d_x = dst_pt->x;
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d_y = dst_pt->y;
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} else {
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d_x = 0;
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d_y = 0;
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}
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clip.left = 0;
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clip.top = 0;
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clip.right = dst_w;
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clip.bottom = dst_h;
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// Clip source rectangle to destination surface
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dst_off_x = d_x;
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dst_off_y = d_y;
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src_off_x = s.left;
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src_off_y = s.top;
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src_draw_w = s.width();
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src_draw_h = s.height();
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// Clip to left edge
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if (d_x < clip.left) {
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if (d_x <= (-src_draw_w)) {
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// dst rect completely off left edge
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return SUCCESS;
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}
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src_off_x += (clip.left - d_x);
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src_draw_w -= (clip.left - d_x);
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dst_off_x = clip.left;
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}
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// Clip to top edge
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if (d_y < clip.top) {
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if (d_y >= (-src_draw_h)) {
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// dst rect completely off top edge
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return SUCCESS;
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}
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src_off_y += (clip.top - d_y);
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src_draw_h -= (clip.top - d_y);
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dst_off_y = clip.top;
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}
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// Clip to right edge
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if (d_x >= clip.right) {
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// dst rect completely off right edge
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return SUCCESS;
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}
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if ((d_x + src_draw_w) > clip.right) {
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src_draw_w = clip.right - d_x;
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}
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// Clip to bottom edge
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if (d_y >= clip.bottom) {
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// dst rect completely off bottom edge
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return SUCCESS;
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}
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if ((d_y + src_draw_h) > clip.bottom) {
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src_draw_h = clip.bottom - d_y;
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}
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// Transfer buffer data to surface
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read_p = (src + src_off_x) + (src_w * src_off_y);
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write_p = (dst_buf + dst_off_x) + (dst_w * dst_off_y);
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for (row = 0; row < src_draw_h; row++) {
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memcpy(write_p, read_p, src_draw_w);
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write_p += dst_w;
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read_p += src_w;
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}
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return SUCCESS;
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}
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// Fills a rectangle in the surface ds from point 'p1' to point 'p2' using
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// the specified color.
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int drawRect(SURFACE *ds, const Rect *dst_rect, int color) {
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Rect r(ds->w, ds->h);
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if (dst_rect != NULL) {
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r = *dst_rect;
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r.clip(ds->w, ds->h);
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if (!r.isValidRect()) {
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// Empty or negative region
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return FAILURE;
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}
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}
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ds->fillRect(r, color);
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return SUCCESS;
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}
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int drawFrame(SURFACE *ds, const Point *p1, const Point *p2, int color) {
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int min_x;
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int max_x;
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int min_y;
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int max_y;
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assert((ds != NULL) && (p1 != NULL) && (p2 != NULL));
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min_x = MIN(p1->x, p2->x);
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max_x = MAX(p1->x, p2->x);
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min_y = MIN(p1->y, p2->y);
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max_y = MAX(p1->y, p2->y);
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ds->frameRect(Common::Rect(min_x, min_y, max_x+1, max_y+1), color);
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return SUCCESS;
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}
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int drawPolyLine(SURFACE *ds, const Point *pts, int pt_ct, int draw_color) {
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const Point *first_pt = pts;
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int last_i = 1;
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int i;
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assert((ds != NULL) & (pts != NULL));
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if (pt_ct < 3) {
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return FAILURE;
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}
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for (i = 1; i < pt_ct; i++) {
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drawLine(ds, &pts[i], &pts[i - 1], draw_color);
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last_i = i;
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}
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drawLine(ds, &pts[last_i], first_pt, draw_color);
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return SUCCESS;
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}
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int getClipInfo(CLIPINFO *clipinfo) {
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Common::Rect s;
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int d_x, d_y;
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Common::Rect clip;
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if (clipinfo == NULL) {
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return FAILURE;
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}
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if (clipinfo->dst_pt != NULL) {
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d_x = clipinfo->dst_pt->x;
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d_y = clipinfo->dst_pt->y;
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} else {
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d_x = 0;
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d_y = 0;
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}
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s = *clipinfo->src_rect;
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clip = *clipinfo->dst_rect;
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// Clip source rectangle to destination surface
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clipinfo->dst_draw_x = d_x;
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clipinfo->dst_draw_y = d_y;
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clipinfo->src_draw_x = s.left;
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clipinfo->src_draw_y = s.top;
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clipinfo->draw_w = s.right - s.left;
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clipinfo->draw_h = s.bottom - s.top;
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clipinfo->nodraw = 0;
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// Clip to left edge
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if (d_x < clip.left) {
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if (d_x <= -(clipinfo->draw_w)) {
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// dst rect completely off left edge
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clipinfo->nodraw = 1;
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return SUCCESS;
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}
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clipinfo->src_draw_x += (clip.left - d_x);
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clipinfo->draw_w -= (clip.left - d_x);
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clipinfo->dst_draw_x = clip.left;
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}
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// Clip to top edge
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if (d_y < clip.top) {
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if (d_y <= -(clipinfo->draw_h)) {
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// dst rect completely off top edge
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clipinfo->nodraw = 1;
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return SUCCESS;
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}
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clipinfo->src_draw_y += (clip.top - d_y);
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clipinfo->draw_h -= (clip.top - d_y);
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clipinfo->dst_draw_y = clip.top;
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}
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// Clip to right edge
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if (d_x >= clip.right) {
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// dst rect completely off right edge
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clipinfo->nodraw = 1;
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return SUCCESS;
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}
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if ((d_x + clipinfo->draw_w) > clip.right) {
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clipinfo->draw_w = clip.right - d_x;
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}
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// Clip to bottom edge
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if (d_y >= clip.bottom) {
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// dst rect completely off bottom edge
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clipinfo->nodraw = 1;
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return SUCCESS;
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}
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if ((d_y + clipinfo->draw_h) > clip.bottom) {
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clipinfo->draw_h = clip.bottom - d_y;
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}
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return SUCCESS;
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}
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int clipLine(SURFACE *ds, const Point *src_p1, const Point *src_p2,
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Point *dst_p1, Point *dst_p2) {
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const Point *n_p1;
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const Point *n_p2;
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Common::Rect clip;
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int left, top, right, bottom;
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int dx, dy;
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float m;
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int y_icpt_l, y_icpt_r;
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clip = ds->clip_rect;
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// Normalize points by x
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if (src_p1->x < src_p2->x) {
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n_p1 = src_p1;
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n_p2 = src_p2;
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} else {
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n_p1 = src_p2;
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n_p2 = src_p1;
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}
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dst_p1->x = n_p1->x;
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dst_p1->y = n_p1->y;
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dst_p2->x = n_p2->x;
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dst_p2->y = n_p2->y;
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left = n_p1->x;
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top = n_p1->y;
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right = n_p2->x;
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bottom = n_p2->y;
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dx = right - left;
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dy = bottom - top;
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if (left < 0) {
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if (right < 0) {
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// Line completely off left edge
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return -1;
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}
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// Clip to left edge
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m = ((float)bottom - top) / (right - left);
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y_icpt_l = (int)(top - (left * m) + 0.5f);
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dst_p1->x = 0;
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dst_p1->y = y_icpt_l;
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}
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if (bottom > clip.right) {
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if (left > clip.right) {
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// Line completely off right edge
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return -1;
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}
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// Clip to right edge
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m = ((float)top - bottom) / (right - left);
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y_icpt_r = (int)(top - ((clip.right - left) * m) + 0.5f);
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dst_p1->y = y_icpt_r;
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|
dst_p2->x = clip.right;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
// Utilizes Bresenham's run-length slice algorithm described in
|
|
// "Michael Abrash's Graphics Programming Black Book",
|
|
// Coriolis Group Books, 1997
|
|
//
|
|
// Performs no clipping
|
|
void drawLine(SURFACE *ds, const Point *p1, const Point *p2, int color) {
|
|
byte *write_p;
|
|
int clip_result;
|
|
int temp;
|
|
int error_up, error_down;
|
|
int error;
|
|
int x_vector;
|
|
int dx, dy;
|
|
int min_run;
|
|
int init_run;
|
|
int run;
|
|
int end_run;
|
|
Point clip_p1, clip_p2;
|
|
int left, top, right, bottom;
|
|
int i, k;
|
|
|
|
clip_result = clipLine(ds, p1, p2, &clip_p1, &clip_p2);
|
|
if (clip_result < 0) {
|
|
// Line not visible
|
|
return;
|
|
}
|
|
|
|
left = clip_p1.x;
|
|
top = clip_p1.y;
|
|
right = clip_p2.x;
|
|
bottom = clip_p2.y;
|
|
|
|
if ((left < ds->clip_rect.left) || (right < ds->clip_rect.left) || (left > ds->clip_rect.right) || (right > ds->clip_rect.right)) {
|
|
return;
|
|
}
|
|
|
|
if ((top < ds->clip_rect.top) || (bottom < ds->clip_rect.top) || (top > ds->clip_rect.bottom) || (bottom > ds->clip_rect.bottom)) {
|
|
return;
|
|
}
|
|
|
|
if (top > bottom) {
|
|
temp = top;
|
|
top = bottom;
|
|
bottom = temp;
|
|
temp = left;
|
|
left = right;
|
|
right = temp;
|
|
}
|
|
|
|
write_p = (byte *)ds->pixels + (top * ds->pitch) + left;
|
|
dx = right - left;
|
|
|
|
if (dx < 0) {
|
|
x_vector = -1;
|
|
dx = -dx;
|
|
} else {
|
|
x_vector = 1;
|
|
}
|
|
|
|
dy = bottom - top;
|
|
|
|
if (dx == 0) {
|
|
for (i = 0; i <= dy; i++) {
|
|
*write_p = (byte) color;
|
|
write_p += ds->pitch;
|
|
}
|
|
return;
|
|
}
|
|
if (dy == 0) {
|
|
for (i = 0; i <= dx; i++) {
|
|
*write_p = (byte) color;
|
|
write_p += x_vector;
|
|
}
|
|
return;
|
|
}
|
|
if (dx == dy) {
|
|
for (i = 0; i <= dx; i++) {
|
|
*write_p = (byte) color;
|
|
write_p += x_vector + ds->pitch;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (dx >= dy) {
|
|
|
|
min_run = dx / dy;
|
|
error_up = (dx % dy) * 2;
|
|
error_down = dy * 2;
|
|
error = (dx % dy) - (dy * 2);
|
|
init_run = (min_run / 2) + 1;
|
|
end_run = init_run;
|
|
|
|
if ((error_up == 0) && (min_run & 0x01) == 0) {
|
|
init_run--;
|
|
}
|
|
|
|
error += dy;
|
|
|
|
// Horiz. seg
|
|
for (k = 0; k < init_run; k++) {
|
|
*write_p = (byte) color;
|
|
write_p += x_vector;
|
|
}
|
|
write_p += ds->pitch;
|
|
|
|
for (i = 0; i < (dy - 1); i++) {
|
|
run = min_run;
|
|
if ((error += error_up) > 0) {
|
|
|
|
run++;
|
|
error -= error_down;
|
|
}
|
|
|
|
// Horiz. seg
|
|
for (k = 0; k < run; k++) {
|
|
*write_p = (byte) color;
|
|
write_p += x_vector;
|
|
}
|
|
write_p += ds->pitch;
|
|
}
|
|
|
|
// Horiz. seg
|
|
for (k = 0; k < end_run; k++) {
|
|
*write_p = (byte) color;
|
|
write_p += x_vector;
|
|
}
|
|
write_p += ds->pitch;
|
|
return;
|
|
|
|
} else {
|
|
|
|
min_run = dy / dx;
|
|
error_up = (dy % dx) * 2;
|
|
error_down = dx * 2;
|
|
error = (dy % dx) - (dx * 2);
|
|
init_run = (min_run / 2) + 1;
|
|
end_run = init_run;
|
|
|
|
if ((error_up == 0) && ((min_run & 0x01) == 0)) {
|
|
init_run--;
|
|
}
|
|
|
|
if ((min_run & 0x01) != 0) {
|
|
error += dx;
|
|
}
|
|
|
|
// Vertical seg
|
|
for (k = 0; k < init_run; k++) {
|
|
*write_p = (byte) color;
|
|
write_p += ds->pitch;
|
|
}
|
|
write_p += x_vector;
|
|
|
|
for (i = 0; i < (dx - 1); i++) {
|
|
run = min_run;
|
|
if ((error += error_up) > 0) {
|
|
run++;
|
|
error -= error_down;
|
|
}
|
|
|
|
// Vertical seg
|
|
for (k = 0; k < run; k++) {
|
|
*write_p = (byte) color;
|
|
write_p += ds->pitch;
|
|
}
|
|
write_p += x_vector;
|
|
}
|
|
|
|
// Vertical seg
|
|
for (k = 0; k < end_run; k++) {
|
|
*write_p = (byte) color;
|
|
write_p += ds->pitch;
|
|
}
|
|
write_p += x_vector;
|
|
return;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
SURFACE *Gfx::getBackBuffer() {
|
|
return &_back_buf;
|
|
}
|
|
|
|
int Gfx::getWhite(void) {
|
|
return _white_index;
|
|
}
|
|
|
|
int Gfx::getBlack(void) {
|
|
return _black_index;
|
|
}
|
|
|
|
int Gfx::matchColor(unsigned long colormask) {
|
|
int i;
|
|
int red = (colormask & 0x0FF0000UL) >> 16;
|
|
int green = (colormask & 0x000FF00UL) >> 8;
|
|
int blue = colormask & 0x00000FFUL;
|
|
int dr;
|
|
int dg;
|
|
int db;
|
|
long color_delta;
|
|
long best_delta = LONG_MAX;
|
|
int best_index = 0;
|
|
byte *ppal;
|
|
|
|
for (i = 0, ppal = _cur_pal; i < PAL_ENTRIES; i++, ppal += 4) {
|
|
dr = ppal[0] - red;
|
|
dr = ABS(dr);
|
|
dg = ppal[1] - green;
|
|
dg = ABS(dg);
|
|
db = ppal[2] - blue;
|
|
db = ABS(db);
|
|
ppal[3] = 0;
|
|
|
|
color_delta = (long)(dr * RED_WEIGHT + dg * GREEN_WEIGHT + db * BLUE_WEIGHT);
|
|
|
|
if (color_delta == 0) {
|
|
return i;
|
|
}
|
|
|
|
if (color_delta < best_delta) {
|
|
best_delta = color_delta;
|
|
best_index = i;
|
|
}
|
|
}
|
|
|
|
return best_index;
|
|
}
|
|
|
|
int Gfx::setPalette(SURFACE *surface, PALENTRY *pal) {
|
|
byte red;
|
|
byte green;
|
|
byte blue;
|
|
int color_delta;
|
|
int best_wdelta = 0;
|
|
int best_windex = 0;
|
|
int best_bindex = 0;
|
|
int best_bdelta = 1000;
|
|
int i;
|
|
byte *ppal;
|
|
|
|
for (i = 0, ppal = _cur_pal; i < PAL_ENTRIES; i++, ppal += 4) {
|
|
red = pal[i].red;
|
|
ppal[0] = red;
|
|
color_delta = red;
|
|
green = pal[i].green;
|
|
ppal[1] = green;
|
|
color_delta += green;
|
|
blue = pal[i].blue;
|
|
ppal[2] = blue;
|
|
color_delta += blue;
|
|
ppal[3] = 0;
|
|
|
|
if (color_delta < best_bdelta) {
|
|
best_bindex = i;
|
|
best_bdelta = color_delta;
|
|
}
|
|
|
|
if (color_delta > best_wdelta) {
|
|
best_windex = i;
|
|
best_wdelta = color_delta;
|
|
}
|
|
}
|
|
|
|
// When the palette changes, make sure the cursor colours are still
|
|
// correct. We may have to reconsider this code later, but for now
|
|
// there is only one cursor image.
|
|
if (_white_index != best_windex) {
|
|
setCursor(best_windex);
|
|
}
|
|
|
|
// Set whitest and blackest color indices
|
|
_white_index = best_windex;
|
|
_black_index = best_bindex;
|
|
|
|
_system->setPalette(_cur_pal, 0, PAL_ENTRIES);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
int Gfx::getCurrentPal(PALENTRY *src_pal) {
|
|
int i;
|
|
byte *ppal;
|
|
|
|
for (i = 0, ppal = _cur_pal; i < PAL_ENTRIES; i++, ppal += 4) {
|
|
src_pal[i].red = ppal[0];
|
|
src_pal[i].green = ppal[1];
|
|
src_pal[i].blue = ppal[2];
|
|
}
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
int Gfx::palToBlack(SURFACE *surface, 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 = _cur_pal; 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;
|
|
}
|
|
|
|
_system->setPalette(_cur_pal, 0, PAL_ENTRIES);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
int Gfx::blackToPal(SURFACE *surface, 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 = _cur_pal; 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 = _cur_pal; 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;
|
|
}
|
|
}
|
|
}
|
|
|
|
// When the palette changes, make sure the cursor colours are still
|
|
// correct. We may have to reconsider this code later, but for now
|
|
// there is only one cursor image.
|
|
if (_white_index != best_windex) {
|
|
setCursor(best_windex);
|
|
}
|
|
|
|
_system->setPalette(_cur_pal, 0, PAL_ENTRIES);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
void Gfx::palToBlackWait(SURFACE *surface, PALENTRY *src_pal, int duration) {
|
|
uint32 start_time = _vm->_system->getMillis();
|
|
uint32 cur_time;
|
|
|
|
do {
|
|
cur_time = _vm->_system->getMillis();
|
|
|
|
palToBlack(surface, src_pal, (double) (cur_time - start_time) / duration);
|
|
_vm->processInput();
|
|
_vm->_system->updateScreen();
|
|
_vm->_system->delayMillis(50);
|
|
} while (cur_time < start_time + duration);
|
|
}
|
|
|
|
void Gfx::blackToPalWait(SURFACE *surface, PALENTRY *src_pal, int duration) {
|
|
uint32 start_time = _vm->_system->getMillis();
|
|
uint32 cur_time;
|
|
|
|
do {
|
|
cur_time = _vm->_system->getMillis();
|
|
|
|
blackToPal(surface, src_pal, (double) (cur_time - start_time) / duration);
|
|
_vm->processInput();
|
|
_vm->_system->updateScreen();
|
|
_vm->_system->delayMillis(50);
|
|
} while (cur_time < start_time + duration);
|
|
}
|
|
|
|
void Gfx::showCursor(bool state) {
|
|
updateCursor();
|
|
g_system->showMouse(state);
|
|
}
|
|
|
|
void Gfx::setCursor(int best_white) {
|
|
int i;
|
|
byte keycolor = (best_white == 0) ? 1 : 0;
|
|
|
|
// Set up the mouse cursor
|
|
byte cursor_img[CURSOR_W * CURSOR_H] = {
|
|
0, 0, 0, 255, 0, 0, 0,
|
|
0, 0, 0, 255, 0, 0, 0,
|
|
0, 0, 0, 0, 0, 0, 0,
|
|
255, 255, 0, 0, 0, 255, 255,
|
|
0, 0, 0, 0, 0, 0, 0,
|
|
0, 0, 0, 255, 0, 0, 0,
|
|
0, 0, 0, 255, 0, 0, 0,
|
|
};
|
|
|
|
for (i = 0; i < CURSOR_W * CURSOR_H; i++) {
|
|
if (cursor_img[i] != 0)
|
|
cursor_img[i] = best_white;
|
|
else
|
|
cursor_img[i] = keycolor;
|
|
}
|
|
|
|
_system->setMouseCursor(cursor_img, CURSOR_W, CURSOR_H, 4, 4, keycolor);
|
|
}
|
|
|
|
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
|