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Location: cpp/openttd-patchpack/source/src/blitter/32bpp_base.cpp - annotation
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* This file is part of OpenTTD.
* 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.
* 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.
* 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/>.
*/
/** @file 32bpp_base.cpp Implementation of base for 32 bpp blitters. */
#include "../stdafx.h"
#include "32bpp_base.hpp"
#include "common.hpp"
#include "../safeguards.h"
void *Blitter_32bppBase::MoveTo(void *video, int x, int y)
{
return (uint32 *)video + x + y * _screen.pitch;
}
void Blitter_32bppBase::SetPixel(void *video, int x, int y, uint8 colour)
{
*((Colour *)video + x + y * _screen.pitch) = LookupColourInPalette(colour);
}
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)
{
const Colour c = LookupColourInPalette(colour);
this->DrawLineGeneric(x, y, x2, y2, screen_width, screen_height, width, dash, [=](int x, int y) {
*((Colour *)video + x + y * _screen.pitch) = c;
});
}
void Blitter_32bppBase::DrawRect(void *video, int width, int height, uint8 colour)
{
Colour colour32 = LookupColourInPalette(colour);
do {
Colour *dst = (Colour *)video;
for (int i = width; i > 0; i--) {
*dst = colour32;
dst++;
}
video = (uint32 *)video + _screen.pitch;
} while (--height);
}
void Blitter_32bppBase::CopyFromBuffer(void *video, const void *src, int width, int height)
{
uint32 *dst = (uint32 *)video;
const uint32 *usrc = (const uint32 *)src;
for (; height > 0; height--) {
memcpy(dst, usrc, width * sizeof(uint32));
usrc += width;
dst += _screen.pitch;
}
}
void Blitter_32bppBase::CopyToBuffer(const void *video, void *dst, int width, int height)
{
uint32 *udst = (uint32 *)dst;
const uint32 *src = (const uint32 *)video;
for (; height > 0; height--) {
memcpy(udst, src, width * sizeof(uint32));
src += _screen.pitch;
udst += width;
}
}
void Blitter_32bppBase::CopyImageToBuffer(const void *video, void *dst, int width, int height, int dst_pitch)
{
uint32 *udst = (uint32 *)dst;
const uint32 *src = (const uint32 *)video;
for (; height > 0; height--) {
memcpy(udst, src, width * sizeof(uint32));
src += _screen.pitch;
udst += dst_pitch;
}
}
void Blitter_32bppBase::ScrollBuffer(void *video, int &left, int &top, int &width, int &height, int scroll_x, int scroll_y)
{
const uint32 *src;
uint32 *dst;
if (scroll_y > 0) {
/* Calculate pointers */
dst = (uint32 *)video + left + (top + height - 1) * _screen.pitch;
src = dst - scroll_y * _screen.pitch;
/* Decrease height and increase top */
top += scroll_y;
height -= scroll_y;
assert(height > 0);
/* Adjust left & width */
if (scroll_x >= 0) {
dst += scroll_x;
left += scroll_x;
width -= scroll_x;
} else {
src -= scroll_x;
width += scroll_x;
}
for (int h = height; h > 0; h--) {
memcpy(dst, src, width * sizeof(uint32));
src -= _screen.pitch;
dst -= _screen.pitch;
}
} else {
/* Calculate pointers */
dst = (uint32 *)video + left + top * _screen.pitch;
src = dst - scroll_y * _screen.pitch;
/* Decrease height. (scroll_y is <=0). */
height += scroll_y;
assert(height > 0);
/* Adjust left & width */
if (scroll_x >= 0) {
dst += scroll_x;
left += scroll_x;
width -= scroll_x;
} else {
src -= scroll_x;
width += scroll_x;
}
/* the y-displacement may be 0 therefore we have to use memmove,
* because source and destination may overlap */
for (int h = height; h > 0; h--) {
memmove(dst, src, width * sizeof(uint32));
src += _screen.pitch;
dst += _screen.pitch;
}
}
}
int Blitter_32bppBase::BufferSize(int width, int height)
{
return width * height * sizeof(uint32);
}
void Blitter_32bppBase::PaletteAnimate(const Palette &palette)
{
/* By default, 32bpp doesn't have palette animation */
}
Colour Blitter_32bppBase::ReallyAdjustBrightness(Colour colour, uint8 brightness)
{
assert(DEFAULT_BRIGHTNESS == 1 << 7);
uint64 combined = (((uint64) colour.r) << 32) | (((uint64) colour.g) << 16) | ((uint64) colour.b);
combined *= brightness;
uint16 r = GB(combined, 39, 9);
uint16 g = GB(combined, 23, 9);
uint16 b = GB(combined, 7, 9);
if ((combined & 0x800080008000L) == 0L) {
return Colour(r, g, b, colour.a);
}
uint16 ob = 0;
/* Sum overbright */
if (r > 255) ob += r - 255;
if (g > 255) ob += g - 255;
if (b > 255) ob += b - 255;
/* Reduce overbright strength */
ob /= 2;
return Colour(
r >= 255 ? 255 : min(r + ob * (255 - r) / 256, 255),
g >= 255 ? 255 : min(g + ob * (255 - g) / 256, 255),
b >= 255 ? 255 : min(b + ob * (255 - b) / 256, 255),
colour.a);
}
Blitter::PaletteAnimation Blitter_32bppBase::UsePaletteAnimation()
{
return Blitter::PALETTE_ANIMATION_NONE;
}
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