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https://github.com/libretro/scummvm.git
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dd0c030278
Alpha channel is inverted in the game assets and that lead to issues in OpenGL renderer. E.g. screenshot of savegames were partly black or showing artifacts closes #10983
127 lines
3.4 KiB
C++
127 lines
3.4 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
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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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*
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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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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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 "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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Shape::Shape(BladeRunnerEngine *vm) {
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_vm = vm;
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_data = nullptr;
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_width = 0;
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_height = 0;
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}
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Shape::~Shape() {
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delete[] _data;
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}
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bool Shape::open(const Common::String &container, int index) {
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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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if (index < 0 || (uint32)index >= count) {
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warning("Shape::open invalid index %d (count %u)", index, count);
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return false;
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}
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uint32 size = 0, width = 0, height = 0;
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for (int i = 0; i <= index; ++i) {
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width = stream->readUint32LE();
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height = stream->readUint32LE();
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size = stream->readUint32LE();
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if (size != width * height * 2) {
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warning("Shape::open 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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if (i != index) {
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stream->skip(size);
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}
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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::open shape too big (%d, %d)", width, height);
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}
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_width = width;
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_height = height;
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_data = new byte[size];
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if (stream->read(_data, size) != size) {
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warning("Shape::open error reading shape %d (w %d, h %d, sz %d)", index, 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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void Shape::draw(Graphics::Surface &surface, int x, int y) 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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return;
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}
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const uint8 *src_p = _data + 2 * (src_y * _width + src_x);
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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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uint16 shpColor = READ_LE_UINT16(src_p);
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src_p += 2;
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uint8 a, r, g, b;
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gameDataPixelFormat().colorToARGB(shpColor, a, r, g, b);
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// Ignore the alpha in the output as it is inversed in the input
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uint16 outColor = (uint16)surface.format.RGBToColor(r, g, b);
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if (!a) {
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*(uint16 *)(surface.getBasePtr(dst_x + xi, dst_y + yi)) = outColor;
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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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} // End of namespace BladeRunner
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