mirror of
https://github.com/libretro/scummvm.git
synced 2025-01-08 10:51:11 +00:00
399 lines
14 KiB
C++
399 lines
14 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "bladerunner/shape.h"
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#include "bladerunner/bladerunner.h"
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#include "bladerunner/mouse.h"
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#include "common/debug.h"
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#include "common/ptr.h"
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#include "common/util.h"
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#include "graphics/surface.h"
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namespace BladeRunner {
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bool Shape::load(Common::SeekableReadStream *stream) {
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_width = stream->readUint32LE();
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_height = stream->readUint32LE();
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uint32 size = stream->readUint32LE();
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if (size != (uint32)(_width * _height * 2)) {
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warning("Shape::load size mismatch (w %d, h %d, sz %d)", _width, _height, size);
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return false;
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}
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// Enfoce a reasonable size limit
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if (_width >= 2048 || _height >= 2048) {
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warning("Shape::load shape too big (%d, %d)", _width, _height);
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}
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_data = new byte[size];
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if (stream->read(_data, size) != size) {
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warning("Shape::load error reading shape (w %d, h %d, sz %d)", _width, _height, size);
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return false;
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}
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return true;
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}
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Shape::~Shape() {
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delete[] _data;
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}
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void Shape::drawFilledTriangleAux(Graphics::Surface &surface, const int &dst_x, const int &dst_y, int x1, int y1, int x2, int y2, int x3, int y3, uint32 colorRGB) const {
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// Code used is based on the Bresenham-like algorithm as described in:
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// https://mcejp.github.io/2020/11/06/bresenham.html
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// http://www.sunshine2k.de/coding/java/TriangleRasterization/TriangleRasterization.html
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const Vector2 triangleV1 = Vector2(x1, y1);
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const Vector2 triangleV2 = Vector2(x2, y2); // (V2, V3) should be the flat side, so either x2 == x3 or y2 == y3
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const Vector2 triangleV3 = Vector2(x3, y3);
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// vTmp1 will be moving along the "left" side of the triangle, and vTmp2 along the "right" side.
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Vector2 vTmp1 = triangleV1;
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Vector2 vTmp2 = triangleV1;
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bool swappedDx1WithDy1 = false;
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bool swappedDx2WithDy2 = false;
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int dx1 = abs(triangleV2.x - triangleV1.x);
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int dy1 = abs(triangleV2.y - triangleV1.y);
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if (dy1 > dx1) {
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SWAP(dy1, dx1);
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swappedDx1WithDy1 = true;
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}
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int dx2 = abs(triangleV3.x - triangleV1.x);
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int dy2 = abs(triangleV3.y - triangleV1.y);
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if (dy2 > dx2) {
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SWAP(dy2, dx2);
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swappedDx2WithDy2 = true;
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}
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int signx1 = (triangleV2.x - triangleV1.x) > 0 ? 1: -1;
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if (triangleV2.x == triangleV1.x) {
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signx1 = 0;
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}
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int signx2 = (triangleV3.x - triangleV1.x) > 0 ? 1: -1;
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if (triangleV3.x == triangleV1.x) {
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signx2 = 0;
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}
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int signy1 = (triangleV2.y - triangleV1.y) > 0 ? 1: -1;
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if (triangleV2.y == triangleV1.y) {
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signy1 = 0;
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}
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int signy2 = (triangleV3.y - triangleV1.y) > 0 ? 1: -1;
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if (triangleV3.y == triangleV1.y) {
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signy2 = 0;
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}
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int e1 = 2 * dy1 - dx1;
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int e2 = 2 * dy2 - dx2;
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for (int i = 0; i <= dx1; ++i) {
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// dx1 here may be dy1 (if they swapped above). It is whichever was the largest of the two.
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// We loop over each pixel of "horizontal" (triangle filling) line
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// check if paint goes from left endpoint of "horizontal" (triangle filling) line to right or other way round
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int leftEndPoint, rightEndPoint;
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if (triangleV2.y == triangleV3.y) {
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if (vTmp1.x < vTmp2.x) {
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leftEndPoint = ceil(vTmp1.x);
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rightEndPoint = int(vTmp2.x);
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} else {
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leftEndPoint = ceil(vTmp2.x);
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rightEndPoint = int(vTmp1.x);
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}
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} else {
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if (vTmp1.y < vTmp2.y) {
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leftEndPoint = ceil(vTmp1.y);
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rightEndPoint = int(vTmp2.y);
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} else {
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leftEndPoint = ceil(vTmp2.y);
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rightEndPoint = int(vTmp1.y);
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}
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}
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void *dstPtr;
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for (int xPos = leftEndPoint; xPos <= rightEndPoint; ++xPos) {
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if (triangleV2.y == triangleV3.y) {
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dstPtr = surface.getBasePtr(CLIP(dst_x + xPos, 0, surface.w - 1), CLIP(dst_y + (int)ceil(vTmp1.y), 0, surface.h - 1));
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} else {
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dstPtr = surface.getBasePtr(CLIP(dst_x + (int)ceil(vTmp1.x), 0, surface.w - 1), CLIP(dst_y + xPos, 0, surface.h - 1));
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}
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drawPixel(surface, dstPtr, colorRGB);
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}
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while (e1 >= 0) {
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if (swappedDx1WithDy1) {
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vTmp1.x += signx1;
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} else {
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vTmp1.y += signy1;
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}
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e1 = e1 - 2 * dx1;
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}
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if (swappedDx1WithDy1) {
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vTmp1.y += signy1;
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} else {
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vTmp1.x += signx1;
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}
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e1 = e1 + 2 * dy1;
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// Here we've rendered the next point on the "left" edge triangle line.
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// We now do the same for the "right" edge triangle line, until we are on
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// the same y-value as on the "left" edge triangle line.
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if (triangleV2.y == triangleV3.y) {
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while (vTmp2.y != vTmp1.y) {
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while (e2 >= 0) {
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if (swappedDx2WithDy2) {
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vTmp2.x += signx2;
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} else {
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vTmp2.y += signy2;
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}
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e2 = e2 - 2 * dx2;
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}
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if (swappedDx2WithDy2) {
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vTmp2.y += signy2;
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} else {
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vTmp2.x += signx2;
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}
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e2 = e2 + 2 * dy2;
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}
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} else {
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while (vTmp2.x != vTmp1.x) {
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while (e2 >= 0) {
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if (swappedDx2WithDy2) {
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vTmp2.x += signx2;
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} else {
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vTmp2.y += signy2;
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}
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e2 = e2 - 2 * dx2;
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}
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if (swappedDx2WithDy2) {
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vTmp2.y += signy2;
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} else {
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vTmp2.x += signx2;
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}
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e2 = e2 + 2 * dy2;
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}
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}
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}
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}
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void Shape::draw(Graphics::Surface &surface, int x, int y, uint16 drawModeBitFlags) const {
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int src_x = CLIP(-x, 0, _width);
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int src_y = CLIP(-y, 0, _height);
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int dst_x = CLIP<int>(x, 0, surface.w);
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int dst_y = CLIP<int>(y, 0, surface.h);
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int rect_w = MIN(CLIP(_width + x, 0, _width), surface.w - x);
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int rect_h = MIN(CLIP(_height + y, 0, _height), surface.h - y);
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if (rect_w <= 0 || rect_h <= 0) {
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// Checking here for negative values also,
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// prevents segmentation fault (in the for loop below)
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return;
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}
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if (drawModeBitFlags & Mouse::MouseDrawFlags::CUSTOM) {
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// for both scene exit cursors and static ESPER edge cursors
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// we choose 25x25px -- odd dimensions chosen so that pixel 12 is the absolute middle (with edges 0-24)
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rect_w = MIN(CLIP(25 + x, 0, 25), surface.w - x);
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rect_h = MIN(CLIP(25 + y, 0, 25), surface.h - y);
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const uint32 exitDemoShapeColors[3] = { surface.format.RGBToColor(255, 255, 143),
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surface.format.RGBToColor(228, 108, 10),
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surface.format.RGBToColor(140, 0, 37) };
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const uint32 esperExitDemoShapeColor = surface.format.RGBToColor(230, 230, 230); // For ESPER arrows
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Common::Rect tailRect;
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// We mask out the irrelevant bitflags and exploit the fact
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// that these exit cursor bitflags do not combine,
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// so only one of them can be set at any time.
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switch (drawModeBitFlags & ~0x007F) {
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case Mouse::MouseDrawFlags::EXIT_RIGHT:
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// 6 px h, 6 px w
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drawFilledTriangleAux(surface, dst_x, dst_y, 24, 12, 18, 6, 18, 18, exitDemoShapeColors[ (drawModeBitFlags & 0x7)/2 % 3]);
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drawFilledTriangleAux(surface, dst_x, dst_y, 16, 12, 10, 6, 10, 18, exitDemoShapeColors[((drawModeBitFlags & 0x7)/2 + 1) % 3]);
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drawFilledTriangleAux(surface, dst_x, dst_y, 8, 12, 2, 6, 2, 18, exitDemoShapeColors[((drawModeBitFlags & 0x7)/2 + 2) % 3]);
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break;
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case Mouse::MouseDrawFlags::EXIT_LEFT:
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drawFilledTriangleAux(surface, dst_x, dst_y, 0, 12, 6, 6, 6, 18, exitDemoShapeColors[ (drawModeBitFlags & 0x7)/2 % 3]);
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drawFilledTriangleAux(surface, dst_x, dst_y, 8, 12, 14, 6, 14, 18, exitDemoShapeColors[((drawModeBitFlags & 0x7)/2 + 1) % 3]);
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drawFilledTriangleAux(surface, dst_x, dst_y, 16, 12, 22, 6, 22, 18, exitDemoShapeColors[((drawModeBitFlags & 0x7)/2 + 2) % 3]);
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break;
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case Mouse::MouseDrawFlags::EXIT_UP:
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drawFilledTriangleAux(surface, dst_x, dst_y, 12, 0, 6, 6, 18, 6, exitDemoShapeColors[ (drawModeBitFlags & 0x7)/2 % 3]);
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drawFilledTriangleAux(surface, dst_x, dst_y, 12, 8, 6, 14, 18, 14, exitDemoShapeColors[((drawModeBitFlags & 0x7)/2 + 1) % 3]);
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drawFilledTriangleAux(surface, dst_x, dst_y, 12, 16, 6, 22, 18, 22, exitDemoShapeColors[((drawModeBitFlags & 0x7)/2 + 2) % 3]);
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break;
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case Mouse::MouseDrawFlags::EXIT_DOWN:
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drawFilledTriangleAux(surface, dst_x, dst_y, 12, 24, 6, 18, 18, 18, exitDemoShapeColors[ (drawModeBitFlags & 0x7)/2 % 3]);
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drawFilledTriangleAux(surface, dst_x, dst_y, 12, 16, 6, 10, 18, 10, exitDemoShapeColors[((drawModeBitFlags & 0x7)/2 + 1) % 3]);
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drawFilledTriangleAux(surface, dst_x, dst_y, 12, 8, 6, 2, 18, 2, exitDemoShapeColors[((drawModeBitFlags & 0x7)/2 + 2) % 3]);
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break;
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case Mouse::MouseDrawFlags::ESPER_RIGHT:
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drawFilledTriangleAux(surface, dst_x, dst_y, 24, 12, 12, 0, 12, 24, esperExitDemoShapeColor);
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tailRect = Common::Rect(dst_x + 4, dst_y + 6, dst_x + 12, dst_y + 18);
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surface.fillRect(tailRect, esperExitDemoShapeColor);
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break;
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case Mouse::MouseDrawFlags::ESPER_LEFT:
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drawFilledTriangleAux(surface, dst_x, dst_y, 0, 12, 12, 0, 12, 24, esperExitDemoShapeColor);
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tailRect = Common::Rect(dst_x + 12, dst_y + 6, dst_x + 20, dst_y + 18);
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surface.fillRect(tailRect, esperExitDemoShapeColor);
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break;
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case Mouse::MouseDrawFlags::ESPER_UP:
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drawFilledTriangleAux(surface, dst_x, dst_y, 12, 0, 0, 12, 24, 12, esperExitDemoShapeColor);
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tailRect = Common::Rect(dst_x + 6, dst_y + 12, dst_x + 18, dst_y + 20);
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surface.fillRect(tailRect, esperExitDemoShapeColor);
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break;
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case Mouse::MouseDrawFlags::ESPER_DOWN:
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drawFilledTriangleAux(surface, dst_x, dst_y, 12, 24, 0, 12, 24, 12, esperExitDemoShapeColor);
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tailRect = Common::Rect(dst_x + 6, dst_y + 4, dst_x + 18, dst_y + 12);
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surface.fillRect(tailRect, esperExitDemoShapeColor);
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break;
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default:
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debug("Unsupported custom shape %d", drawModeBitFlags &~ 0xEF);
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break;
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}
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} else {
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const uint8 *src_p = _data + 2 * (src_y * _width + src_x);
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uint16 shpColor = 0;
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uint32 surfaceColorRGBPrev = 0;
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uint32 newSurfaceColorRGB = 0;
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uint8 a, r, g, b;
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uint8 rPrev, gPrev, bPrev;
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uint16 rgb16bitPrev = 0;
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uint16 rgb16bitAdd = 0;
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for (int yi = 0; yi != rect_h; ++yi) {
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for (int xi = 0; xi != rect_w; ++xi) {
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shpColor = READ_LE_UINT16(src_p);
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src_p += 2;
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getGameDataColor(shpColor, a, r, g, b);
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if (!a) {
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// Ignore the alpha in the output as it is inversed in the input
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void *dstPtr = surface.getBasePtr(CLIP(dst_x + xi, 0, surface.w - 1), CLIP(dst_y + yi, 0, surface.h - 1));
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if (drawModeBitFlags & Mouse::MouseDrawFlags::SPECIAL) {
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// It seems that the additive mode was supposed to be used only for cursor shapes
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// From testing, the only cursor shape that seems to work with it is the green rotating cursor
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// We add extra code here to cover the cases of the beta crosshairs cursor
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// being drawn a different color based on bullet power
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// The code for creating the specific color is custom.
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if (drawModeBitFlags & Mouse::MouseDrawFlags::REDCROSSHAIRS) {
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newSurfaceColorRGB = surface.format.RGBToColor((b & 0x8B) | (g >> 1), 0, 0);
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} else if (drawModeBitFlags & Mouse::MouseDrawFlags::YELLOWCROSSHAIRS) {
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newSurfaceColorRGB = surface.format.RGBToColor(b & 0xDF, (b & 0xA5) | (g >> 1), 0);
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} else if (drawModeBitFlags & Mouse::MouseDrawFlags::BLUECROSSHAIRS) {
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newSurfaceColorRGB = surface.format.RGBToColor(r, g, b);
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} else {
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// Additive modes
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getPixel(surface, dstPtr, surfaceColorRGBPrev);
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if (drawModeBitFlags & Mouse::MouseDrawFlags::ADDITIVE_MODE0) {
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// This code makes the cursor semi-transparent
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// but it may not be what the disassembly of the original was going for.
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newSurfaceColorRGB = surface.format.RGBToColor(r, g, b);
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newSurfaceColorRGB = (((uint16)surfaceColorRGBPrev >> 1) & 0xFBEF)
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+ (((uint16)newSurfaceColorRGB >> 1) & 0xFBEF);
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} else if (drawModeBitFlags & Mouse::MouseDrawFlags::ADDITIVE_MODE1) {
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// This code may be closer to what the disassembly of the original was doing
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// for additive draw mode but it doesn't look well.
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surface.format.colorToRGB(surfaceColorRGBPrev, rPrev, gPrev, bPrev);
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rgb16bitPrev = ( ((uint16)(rPrev >> 3) << 10)
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| ((uint16)(gPrev >> 3) << 5)
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| ((uint16)(bPrev >> 3)));
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rgb16bitAdd = (((uint16)rgb16bitPrev >> 1) & 0xFBEF)
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+ ((shpColor >> 1) & 0xFBEF);
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getGameDataColor(rgb16bitAdd, a, r, g, b);
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newSurfaceColorRGB = surface.format.RGBToColor(r, g, b);
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}
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}
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} else {
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newSurfaceColorRGB = surface.format.RGBToColor(r, g, b);
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}
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drawPixel(surface, dstPtr, newSurfaceColorRGB);
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}
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}
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src_p += 2 * (_width - rect_w);
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}
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}
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}
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Shapes::Shapes(BladeRunnerEngine *vm) {
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_vm = vm;
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}
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Shapes::~Shapes() {
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unload();
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}
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bool Shapes::load(const Common::String &container) {
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unload();
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Common::ScopedPtr<Common::SeekableReadStream> stream(_vm->getResourceStream(container));
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if (!stream) {
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warning("Shape::open failed to open '%s'", container.c_str());
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return false;
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}
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uint32 count = stream->readUint32LE();
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_shapes.resize(count);
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for (uint32 i = 0; i < count; ++i) {
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if (!_shapes[i].load(stream.get())) {
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return false;
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}
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}
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return true;
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}
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void Shapes::unload() {
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_shapes.clear();
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}
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} // End of namespace BladeRunner
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