222 lines
6.2 KiB
C++
222 lines
6.2 KiB
C++
/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file 32bpp_base.cpp Implementation of base for 32 bpp blitters. */
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#include "../stdafx.h"
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#include "32bpp_base.hpp"
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#include "common.hpp"
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#include "../safeguards.h"
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void *Blitter_32bppBase::MoveTo(void *video, int x, int y)
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{
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return (uint32 *)video + x + y * _screen.pitch;
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}
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void Blitter_32bppBase::SetPixel(void *video, int x, int y, uint8 colour)
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{
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*((Colour *)video + x + y * _screen.pitch) = LookupColourInPalette(colour);
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}
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void Blitter_32bppBase::SetPixel32(void *video, int x, int y, uint8 colour, uint32 colour32)
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{
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*((Colour *)video + x + y * _screen.pitch) = colour32;
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}
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void Blitter_32bppBase::DrawLine(void *video, int x, int y, int x2, int y2, int screen_width, int screen_height, uint8 colour, int width, int dash)
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{
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const Colour c = LookupColourInPalette(colour);
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this->DrawLineGeneric(x, y, x2, y2, screen_width, screen_height, width, dash, [=](int x, int y) {
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*((Colour *)video + x + y * _screen.pitch) = c;
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});
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}
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void Blitter_32bppBase::SetRect(void *video, int x, int y, const uint8 *colours, uint lines, uint width, uint pitch)
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{
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Colour *dst = (Colour *)video + x + y * _screen.pitch;
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do {
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uint w = width;
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do {
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*dst = LookupColourInPalette(*colours);
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dst++;
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colours++;
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} while (--w);
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dst += _screen.pitch - width;
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colours += pitch - width;
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} while (--lines);
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}
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void Blitter_32bppBase::SetRect32(void *video, int x, int y, const uint32 *colours, uint lines, uint width, uint pitch)
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{
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uint32 *dst = (uint32 *)video + x + y * _screen.pitch;
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do {
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memcpy(dst, colours, width * sizeof(uint32));
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dst += _screen.pitch;
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colours += pitch;
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} while (--lines);
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}
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void Blitter_32bppBase::DrawRect(void *video, int width, int height, uint8 colour)
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{
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Colour colour32 = LookupColourInPalette(colour);
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do {
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Colour *dst = (Colour *)video;
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for (int i = width; i > 0; i--) {
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*dst = colour32;
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dst++;
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}
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video = (uint32 *)video + _screen.pitch;
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} while (--height);
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}
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void Blitter_32bppBase::DrawRectAt(void *video, int x, int y, int width, int height, uint8 colour)
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{
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this->Blitter_32bppBase::DrawRect((Colour *)video + x + y * _screen.pitch, width, height, colour);
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}
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void Blitter_32bppBase::CopyFromBuffer(void *video, const void *src, int width, int height)
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{
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uint32 *dst = (uint32 *)video;
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const uint32 *usrc = (const uint32 *)src;
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for (; height > 0; height--) {
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memcpy(dst, usrc, width * sizeof(uint32));
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usrc += width;
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dst += _screen.pitch;
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}
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}
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void Blitter_32bppBase::CopyToBuffer(const void *video, void *dst, int width, int height)
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{
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uint32 *udst = (uint32 *)dst;
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const uint32 *src = (const uint32 *)video;
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for (; height > 0; height--) {
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memcpy(udst, src, width * sizeof(uint32));
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src += _screen.pitch;
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udst += width;
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}
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}
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void Blitter_32bppBase::CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch)
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{
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uint32 *udst = (uint32 *)dst;
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const uint32 *src = (const uint32 *)video;
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for (; height > 0; height--) {
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memcpy(udst, src, width * sizeof(uint32));
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src += _screen.pitch;
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udst += dst_pitch;
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}
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}
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void Blitter_32bppBase::ScrollBuffer(void *video, int left, int top, int width, int height, int scroll_x, int scroll_y)
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{
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const uint32 *src;
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uint32 *dst;
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if (scroll_y > 0) {
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/* Calculate pointers */
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dst = (uint32 *)video + left + (top + height - 1) * _screen.pitch;
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src = dst - scroll_y * _screen.pitch;
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/* Decrease height and increase top */
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top += scroll_y;
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height -= scroll_y;
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assert_msg(height > 0, "%d, %d, %d, %d, %d, %d", left, top, width, height, scroll_x, scroll_y);
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/* Adjust left & width */
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if (scroll_x >= 0) {
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dst += scroll_x;
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left += scroll_x;
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width -= scroll_x;
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} else {
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src -= scroll_x;
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width += scroll_x;
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}
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for (int h = height; h > 0; h--) {
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memcpy(dst, src, width * sizeof(uint32));
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src -= _screen.pitch;
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dst -= _screen.pitch;
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}
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} else {
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/* Calculate pointers */
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dst = (uint32 *)video + left + top * _screen.pitch;
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src = dst - scroll_y * _screen.pitch;
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/* Decrease height. (scroll_y is <=0). */
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height += scroll_y;
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assert_msg(height > 0, "%d, %d, %d, %d, %d, %d", left, top, width, height, scroll_x, scroll_y);
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/* Adjust left & width */
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if (scroll_x >= 0) {
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dst += scroll_x;
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left += scroll_x;
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width -= scroll_x;
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} else {
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src -= scroll_x;
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width += scroll_x;
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}
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/* the y-displacement may be 0 therefore we have to use memmove,
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* because source and destination may overlap */
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for (int h = height; h > 0; h--) {
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memmove(dst, src, width * sizeof(uint32));
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src += _screen.pitch;
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dst += _screen.pitch;
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}
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}
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}
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size_t Blitter_32bppBase::BufferSize(uint width, uint height)
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{
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return sizeof(uint32) * width * height;
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}
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void Blitter_32bppBase::PaletteAnimate(const Palette &palette)
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{
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/* By default, 32bpp doesn't have palette animation */
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}
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Colour Blitter_32bppBase::ReallyAdjustBrightness(Colour colour, uint8 brightness)
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{
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assert(DEFAULT_BRIGHTNESS == 1 << 7);
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uint64 combined = (((uint64) colour.r) << 32) | (((uint64) colour.g) << 16) | ((uint64) colour.b);
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combined *= brightness;
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uint16 r = GB(combined, 39, 9);
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uint16 g = GB(combined, 23, 9);
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uint16 b = GB(combined, 7, 9);
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if ((combined & 0x800080008000L) == 0L) {
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return Colour(r, g, b, colour.a);
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}
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uint16 ob = 0;
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/* Sum overbright */
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if (r > 255) ob += r - 255;
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if (g > 255) ob += g - 255;
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if (b > 255) ob += b - 255;
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/* Reduce overbright strength */
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ob /= 2;
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return Colour(
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r >= 255 ? 255 : std::min(r + ob * (255 - r) / 256, 255),
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g >= 255 ? 255 : std::min(g + ob * (255 - g) / 256, 255),
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b >= 255 ? 255 : std::min(b + ob * (255 - b) / 256, 255),
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colour.a);
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}
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Blitter::PaletteAnimation Blitter_32bppBase::UsePaletteAnimation()
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{
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return Blitter::PALETTE_ANIMATION_NONE;
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}
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