108 lines
2.8 KiB
C++
108 lines
2.8 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 <nds.h>
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#include "backends/platform/ds/background.h"
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namespace DS {
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BgSize getBgSize(int width, int height, bool isRGB, int &realPitch) {
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BgSize size;
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if (width > 512 && !isRGB) {
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size = BgSize_B8_1024x512;
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realPitch = 1024;
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} else if (height > 512 && !isRGB) {
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size = BgSize_B8_512x1024;
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realPitch = 512;
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} else if (height > 256) {
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if (isRGB) {
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size = BgSize_B16_512x512;
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realPitch = 1024;
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} else {
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size = BgSize_B8_512x512;
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realPitch = 512;
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}
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} else if (width > 256) {
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if (isRGB) {
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size = BgSize_B16_512x256;
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realPitch = 1024;
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} else {
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size = BgSize_B8_512x256;
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realPitch = 512;
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}
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} else if (width > 128 || height > 128) {
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if (isRGB) {
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size = BgSize_B16_256x256;
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realPitch = 512;
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} else {
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size = BgSize_B8_256x256;
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realPitch = 256;
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}
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} else {
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if (isRGB) {
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size = BgSize_B16_128x128;
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realPitch = 256;
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} else {
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size = BgSize_B8_128x128;
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realPitch = 128;
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}
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}
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return size;
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}
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void Background::create(uint16 width, uint16 height, bool isRGB, int layer, bool isSub, int mapBase) {
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const Graphics::PixelFormat f = isRGB ? Graphics::PixelFormat(2, 5, 5, 5, 1, 0, 5, 10, 15) : Graphics::PixelFormat::createFormatCLUT8();
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Surface::create(width, height, f);
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BgType type = isRGB ? BgType_Bmp16 : BgType_Bmp8;
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BgSize size = getBgSize(width, height, isRGB, _realPitch);
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if (isSub) {
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_bg = bgInitSub(layer, type, size, mapBase, 0);
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} else {
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_bg = bgInit(layer, type, size, mapBase, 0);
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}
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}
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void Background::update() {
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u16 *src = (u16 *)getPixels();
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u16 *dst = bgGetGfxPtr(_bg);
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dmaCopy(src, dst, _realPitch * h);
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}
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void Background::reset() {
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u16 *dst = bgGetGfxPtr(_bg);
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dmaFillHalfWords(0, dst, _realPitch * h);
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}
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void Background::show() {
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bgShow(_bg);
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_visible = true;
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}
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void Background::hide() {
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bgHide(_bg);
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_visible = false;
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}
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} // End of namespace DS
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