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OpenRCT2/src/openrct2/drawing/X8DrawingEngine.cpp
Ted John 97d68957f0 Fix segfault in screenshot command
2017-06-10 15:48:05 +01:00

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#pragma region Copyright (c) 2014-2017 OpenRCT2 Developers
/*****************************************************************************
* OpenRCT2, an open source clone of Roller Coaster Tycoon 2.
*
* OpenRCT2 is the work of many authors, a full list can be found in contributors.md
* For more information, visit https://github.com/OpenRCT2/OpenRCT2
*
* OpenRCT2 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, either version 3 of the License, or
* (at your option) any later version.
*
* A full copy of the GNU General Public License can be found in licence.txt
*****************************************************************************/
#pragma endregion
#include "../config/Config.h"
#include "../Context.h"
#include "../ui/UiContext.h"
#include "../core/Guard.hpp"
#include "../core/Math.hpp"
#include "../core/Memory.hpp"
#include "../interface/Screenshot.h"
#include "IDrawingContext.h"
#include "IDrawingEngine.h"
#include "Rain.h"
#include "X8DrawingEngine.h"
extern "C"
{
#include "../game.h"
#include "../interface/viewport.h"
#include "../interface/window.h"
#include "../intro.h"
#include "../platform/platform.h"
#include "../rct2.h"
#include "drawing.h"
#include "lightfx.h"
}
using namespace OpenRCT2;
using namespace OpenRCT2::Drawing;
using namespace OpenRCT2::Ui;
X8RainDrawer::X8RainDrawer()
{
_rainPixels = new RainPixel[_rainPixelsCapacity];
}
X8RainDrawer::~X8RainDrawer()
{
delete [] _rainPixels;
}
void X8RainDrawer::SetDPI(rct_drawpixelinfo * dpi)
{
_screenDPI = dpi;
}
void X8RainDrawer::Draw(sint32 x, sint32 y, sint32 width, sint32 height, sint32 xStart, sint32 yStart)
{
static const uint8 RainPattern[] =
{
32, 32, 0, 12, 0, 14, 0, 16, 255, 0, 255, 0, 255, 0, 255, 0, 255,
0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0,
255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255,
0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 0, 0
};
const uint8 * pattern = RainPattern;
uint8 patternXSpace = *pattern++;
uint8 patternYSpace = *pattern++;
uint8 patternStartXOffset = xStart % patternXSpace;
uint8 patternStartYOffset = yStart % patternYSpace;
uint32 pixelOffset = (_screenDPI->pitch + _screenDPI->width) * y + x;
uint8 patternYPos = patternStartYOffset % patternYSpace;
uint8 * screenBits = _screenDPI->bits;
//Stores the colours of changed pixels
RainPixel * newPixels = &_rainPixels[_rainPixelsCount];
for (; height != 0; height--)
{
uint8 patternX = pattern[patternYPos * 2];
if (patternX != 0xFF)
{
if (_rainPixelsCount < (_rainPixelsCapacity - (uint32)width))
{
uint32 finalPixelOffset = width + pixelOffset;
uint32 xPixelOffset = pixelOffset;
xPixelOffset += ((uint8)(patternX - patternStartXOffset)) % patternXSpace;
uint8 patternPixel = pattern[patternYPos * 2 + 1];
for (; xPixelOffset < finalPixelOffset; xPixelOffset += patternXSpace)
{
uint8 current_pixel = screenBits[xPixelOffset];
screenBits[xPixelOffset] = patternPixel;
_rainPixelsCount++;
// Store colour and position
*newPixels++ = { xPixelOffset, current_pixel };
}
}
}
pixelOffset += _screenDPI->pitch + _screenDPI->width;
patternYPos++;
patternYPos %= patternYSpace;
}
}
void X8RainDrawer::Restore()
{
if (_rainPixelsCount > 0)
{
uint32 numPixels = (_screenDPI->width + _screenDPI->pitch) * _screenDPI->height;
uint8 * bits = _screenDPI->bits;
for (uint32 i = 0; i < _rainPixelsCount; i++)
{
RainPixel rainPixel = _rainPixels[i];
if (rainPixel.Position >= numPixels)
{
// Pixel out of bounds, bail
break;
}
bits[rainPixel.Position] = rainPixel.Colour;
}
_rainPixelsCount = 0;
}
}
X8DrawingEngine::X8DrawingEngine()
{
_drawingContext = new X8DrawingContext(this);
#ifdef __ENABLE_LIGHTFX__
_lastLightFXenabled = (gConfigGeneral.enable_light_fx != 0);
#endif
}
X8DrawingEngine::~X8DrawingEngine()
{
delete _drawingContext;
delete [] _dirtyGrid.Blocks;
delete [] _bits;
}
void X8DrawingEngine::Initialise(SDL_Window * window)
{
}
void X8DrawingEngine::Resize(uint32 width, uint32 height)
{
uint32 pitch = width;
ConfigureBits(width, height, pitch);
}
void X8DrawingEngine::SetPalette(const rct_palette_entry * palette)
{
}
void X8DrawingEngine::SetUncappedFrameRate(bool uncapped)
{
// Not applicable for this engine
}
void X8DrawingEngine::Invalidate(sint32 left, sint32 top, sint32 right, sint32 bottom)
{
left = Math::Max(left, 0);
top = Math::Max(top, 0);
right = Math::Min(right, (sint32)_width);
bottom = Math::Min(bottom, (sint32)_height);
if (left >= right) return;
if (top >= bottom) return;
right--;
bottom--;
left >>= _dirtyGrid.BlockShiftX;
right >>= _dirtyGrid.BlockShiftX;
top >>= _dirtyGrid.BlockShiftY;
bottom >>= _dirtyGrid.BlockShiftY;
uint32 dirtyBlockColumns = _dirtyGrid.BlockColumns;
uint8 * screenDirtyBlocks = _dirtyGrid.Blocks;
for (sint16 y = top; y <= bottom; y++)
{
uint32 yOffset = y * dirtyBlockColumns;
for (sint16 x = left; x <= right; x++)
{
screenDirtyBlocks[yOffset + x] = 0xFF;
}
}
}
void X8DrawingEngine::Draw()
{
if (gIntroState != INTRO_STATE_NONE)
{
intro_draw(&_bitsDPI);
}
else
{
#ifdef __ENABLE_LIGHTFX__
// HACK we need to re-configure the bits if light fx has been enabled / disabled
if (_lastLightFXenabled != (gConfigGeneral.enable_light_fx != 0))
{
Resize(_width, _height);
}
#endif
_rainDrawer.SetDPI(&_bitsDPI);
_rainDrawer.Restore();
ResetWindowVisbilities();
// Redraw dirty regions before updating the viewports, otherwise
// when viewports get panned, they copy dirty pixels
DrawAllDirtyBlocks();
window_update_all_viewports();
DrawAllDirtyBlocks();
window_update_all();
gfx_draw_pickedup_peep(&_bitsDPI);
gfx_invalidate_pickedup_peep();
DrawRain(&_bitsDPI, &_rainDrawer);
rct2_draw(&_bitsDPI);
}
}
void X8DrawingEngine::CopyRect(sint32 x, sint32 y, sint32 width, sint32 height, sint32 dx, sint32 dy)
{
if (dx == 0 && dy == 0) return;
// Originally 0x00683359
// Adjust for move off screen
// NOTE: when zooming, there can be x, y, dx, dy combinations that go off the
// screen; hence the checks. This code should ultimately not be called when
// zooming because this function is specific to updating the screen on move
sint32 lmargin = Math::Min(x - dx, 0);
sint32 rmargin = Math::Min((sint32)_width - (x - dx + width), 0);
sint32 tmargin = Math::Min(y - dy, 0);
sint32 bmargin = Math::Min((sint32)_height - (y - dy + height), 0);
x -= lmargin;
y -= tmargin;
width += lmargin + rmargin;
height += tmargin + bmargin;
sint32 stride = _bitsDPI.width + _bitsDPI.pitch;
uint8 * to = _bitsDPI.bits + y * stride + x;
uint8 * from = _bitsDPI.bits + (y - dy) * stride + x - dx;
if (dy > 0)
{
// If positive dy, reverse directions
to += (height - 1) * stride;
from += (height - 1) * stride;
stride = -stride;
}
// Move bytes
for (sint32 i = 0; i < height; i++)
{
memmove(to, from, width);
to += stride;
from += stride;
}
}
sint32 X8DrawingEngine::Screenshot()
{
return screenshot_dump_png(&_bitsDPI);
}
IDrawingContext * X8DrawingEngine::GetDrawingContext(rct_drawpixelinfo * dpi)
{
_drawingContext->SetDPI(dpi);
return _drawingContext;
}
rct_drawpixelinfo * X8DrawingEngine::GetDrawingPixelInfo()
{
return &_bitsDPI;
}
DRAWING_ENGINE_FLAGS X8DrawingEngine::GetFlags()
{
return DEF_DIRTY_OPTIMISATIONS;
}
void X8DrawingEngine::InvalidateImage(uint32 image)
{
// Not applicable for this engine
}
rct_drawpixelinfo * X8DrawingEngine::GetDPI()
{
return &_bitsDPI;
}
void X8DrawingEngine::ConfigureBits(uint32 width, uint32 height, uint32 pitch)
{
size_t newBitsSize = pitch * height;
uint8 * newBits = new uint8[newBitsSize];
if (_bits == nullptr)
{
Memory::Set(newBits, 0, newBitsSize);
}
else
{
if (_pitch == pitch)
{
Memory::Copy(newBits, _bits, Math::Min(_bitsSize, newBitsSize));
}
else
{
uint8 * src = _bits;
uint8 * dst = newBits;
uint32 minWidth = Math::Min(_width, width);
uint32 minHeight = Math::Min(_height, height);
for (uint32 y = 0; y < minHeight; y++)
{
Memory::Copy(dst, src, minWidth);
if (pitch - minWidth > 0)
{
Memory::Set(dst + minWidth, 0, pitch - minWidth);
}
src += _pitch;
dst += pitch;
}
}
delete [] _bits;
}
_bits = newBits;
_bitsSize = newBitsSize;
_width = width;
_height = height;
_pitch = pitch;
rct_drawpixelinfo * dpi = &_bitsDPI;
dpi->bits = _bits;
dpi->x = 0;
dpi->y = 0;
dpi->width = width;
dpi->height = height;
dpi->pitch = _pitch - width;
ConfigureDirtyGrid();
#ifdef __ENABLE_LIGHTFX__
if (gConfigGeneral.enable_light_fx)
{
lightfx_update_buffers(dpi);
}
#endif
}
void X8DrawingEngine::ConfigureDirtyGrid()
{
_dirtyGrid.BlockShiftX = 7;
_dirtyGrid.BlockShiftY = 6;
_dirtyGrid.BlockWidth = 1 << _dirtyGrid.BlockShiftX;
_dirtyGrid.BlockHeight = 1 << _dirtyGrid.BlockShiftY;
_dirtyGrid.BlockColumns = (_width >> _dirtyGrid.BlockShiftX) + 1;
_dirtyGrid.BlockRows = (_height >> _dirtyGrid.BlockShiftY) + 1;
delete [] _dirtyGrid.Blocks;
_dirtyGrid.Blocks = new uint8[_dirtyGrid.BlockColumns * _dirtyGrid.BlockRows];
}
void X8DrawingEngine::ResetWindowVisbilities()
{
// reset window visibility status to unknown
for (rct_window *w = g_window_list; w < gWindowNextSlot; w++)
{
w->visibility = VC_UNKNOWN;
if (w->viewport != NULL) w->viewport->visibility = VC_UNKNOWN;
}
}
void X8DrawingEngine::DrawAllDirtyBlocks()
{
uint32 dirtyBlockColumns = _dirtyGrid.BlockColumns;
uint32 dirtyBlockRows = _dirtyGrid.BlockRows;
uint8 * dirtyBlocks = _dirtyGrid.Blocks;
for (uint32 x = 0; x < dirtyBlockColumns; x++)
{
for (uint32 y = 0; y < dirtyBlockRows; y++)
{
uint32 yOffset = y * dirtyBlockColumns;
if (dirtyBlocks[yOffset + x] == 0)
{
continue;
}
// Determine columns
uint32 xx;
for (xx = x; xx < dirtyBlockColumns; xx++)
{
if (dirtyBlocks[yOffset + xx] == 0)
{
break;
}
}
uint32 columns = xx - x;
// Check rows
uint32 yy;
for (yy = y; yy < dirtyBlockRows; yy++)
{
uint32 yyOffset = yy * dirtyBlockColumns;
for (xx = x; xx < x + columns; xx++)
{
if (dirtyBlocks[yyOffset + xx] == 0)
{
goto endRowCheck;
}
}
}
endRowCheck:
uint32 rows = yy - y;
DrawDirtyBlocks(x, y, columns, rows);
}
}
}
void X8DrawingEngine::DrawDirtyBlocks(uint32 x, uint32 y, uint32 columns, uint32 rows)
{
uint32 dirtyBlockColumns = _dirtyGrid.BlockColumns;
uint8 * screenDirtyBlocks = _dirtyGrid.Blocks;
// Unset dirty blocks
for (uint32 top = y; top < y + (uint32)rows; top++)
{
uint32 topOffset = top * dirtyBlockColumns;
for (uint32 left = x; left < x + (uint32)columns; left++)
{
screenDirtyBlocks[topOffset + left] = 0;
}
}
// Determine region in pixels
uint32 left = Math::Max<uint32>(0, x * _dirtyGrid.BlockWidth);
uint32 top = Math::Max<uint32>(0, y * _dirtyGrid.BlockHeight);
uint32 right = Math::Min(_width, left + (columns * _dirtyGrid.BlockWidth));
uint32 bottom = Math::Min(_height, top + (rows * _dirtyGrid.BlockHeight));
if (right <= left || bottom <= top)
{
return;
}
// Draw region
window_draw_all(&_bitsDPI, left, top, right, bottom);
}
X8DrawingContext::X8DrawingContext(X8DrawingEngine * engine)
{
_engine = engine;
}
X8DrawingContext::~X8DrawingContext()
{
}
IDrawingEngine * X8DrawingContext::GetEngine()
{
return _engine;
}
void X8DrawingContext::Clear(uint8 paletteIndex)
{
rct_drawpixelinfo * dpi = _dpi;
sint32 w = dpi->width >> dpi->zoom_level;
sint32 h = dpi->height >> dpi->zoom_level;
uint8 * ptr = dpi->bits;
for (sint32 y = 0; y < h; y++)
{
Memory::Set(ptr, paletteIndex, w);
ptr += w + dpi->pitch;
}
}
/** rct2: 0x0097FF04 */
static const uint16 Pattern[] = {
0b0111111110000000,
0b0011111111000000,
0b0001111111100000,
0b0000111111110000,
0b0000011111111000,
0b0000001111111100,
0b0000000111111110,
0b0000000011111111,
0b1000000001111111,
0b1100000000111111,
0b1110000000011111,
0b1111000000001111,
0b1111100000000111,
0b1111110000000011,
0b1111111000000001,
0b1111111100000000,
};
/** rct2: 0x0097FF14 */
static const uint16 PatternInverse[] = {
0b1000000001111111,
0b1100000000111111,
0b1110000000011111,
0b1111000000001111,
0b1111100000000111,
0b1111110000000011,
0b1111111000000001,
0b1111111100000000,
0b0111111110000000,
0b0011111111000000,
0b0001111111100000,
0b0000111111110000,
0b0000011111111000,
0b0000001111111100,
0b0000000111111110,
0b0000000011111111
};
/** rct2: 0x0097FEFC */
static const uint16 * Patterns[] = {
Pattern,
PatternInverse
};
void X8DrawingContext::FillRect(uint32 colour, sint32 left, sint32 top, sint32 right, sint32 bottom)
{
rct_drawpixelinfo * dpi = _dpi;
if (left > right) return;
if (top > bottom) return;
if (dpi->x > right) return;
if (left >= dpi->x + dpi->width) return;
if (bottom < dpi->y) return;
if (top >= dpi->y + dpi->height) return;
uint16 crossPattern = 0;
sint32 startX = left - dpi->x;
if (startX < 0)
{
crossPattern ^= startX;
startX = 0;
}
sint32 endX = right - dpi->x + 1;
if (endX > dpi->width)
{
endX = dpi->width;
}
sint32 startY = top - dpi->y;
if (startY < 0)
{
crossPattern ^= startY;
startY = 0;
}
sint32 endY = bottom - dpi->y + 1;
if (endY > dpi->height)
{
endY = dpi->height;
}
sint32 width = endX - startX;
sint32 height = endY - startY;
if (colour & 0x1000000)
{
// Cross hatching
uint8 * dst = (startY * (dpi->width + dpi->pitch)) + startX + dpi->bits;
for (sint32 i = 0; i < height; i++)
{
uint8 * nextdst = dst + dpi->width + dpi->pitch;
uint32 p = ror32(crossPattern, 1);
p = (p & 0xFFFF0000) | width;
// Fill every other pixel with the colour
for (; (p & 0xFFFF) != 0; p--)
{
p = p ^ 0x80000000;
if (p & 0x80000000)
{
*dst = colour & 0xFF;
}
dst++;
}
crossPattern ^= 1;
dst = nextdst;
}
}
else if (colour & 0x2000000)
{
assert(false);
}
else if (colour & 0x4000000)
{
uint8 * dst = startY * (dpi->width + dpi->pitch) + startX + dpi->bits;
// The pattern loops every 15 lines this is which
// part the pattern is on.
sint32 patternY = (startY + dpi->y) % 16;
// The pattern loops every 15 pixels this is which
// part the pattern is on.
sint32 startPatternX = (startX + dpi->x) % 16;
sint32 patternX = startPatternX;
const uint16 * patternsrc = Patterns[colour >> 28]; // or possibly uint8)[esi*4] ?
for (sint32 numLines = height; numLines > 0; numLines--)
{
uint8 * nextdst = dst + dpi->width + dpi->pitch;
uint16 pattern = patternsrc[patternY];
for (sint32 numPixels = width; numPixels > 0; numPixels--)
{
if (pattern & (1 << patternX))
{
*dst = colour & 0xFF;
}
patternX = (patternX + 1) % 16;
dst++;
}
patternX = startPatternX;
patternY = (patternY + 1) % 16;
dst = nextdst;
}
}
else
{
uint8 * dst = startY * (dpi->width + dpi->pitch) + startX + dpi->bits;
for (sint32 i = 0; i < height; i++)
{
Memory::Set(dst, colour & 0xFF, width);
dst += dpi->width + dpi->pitch;
}
}
}
void X8DrawingContext::FilterRect(FILTER_PALETTE_ID palette, sint32 left, sint32 top, sint32 right, sint32 bottom)
{
rct_drawpixelinfo * dpi = _dpi;
if (left > right) return;
if (top > bottom) return;
if (dpi->x > right) return;
if (left >= dpi->x + dpi->width) return;
if (bottom < dpi->y) return;
if (top >= dpi->y + dpi->height) return;
sint32 startX = left - dpi->x;
if (startX < 0)
{
startX = 0;
}
sint32 endX = right - dpi->x + 1;
if (endX > dpi->width)
{
endX = dpi->width;
}
sint32 startY = top - dpi->y;
if (startY < 0)
{
startY = 0;
}
sint32 endY = bottom - dpi->y + 1;
if (endY > dpi->height)
{
endY = dpi->height;
}
sint32 width = endX - startX;
sint32 height = endY - startY;
//0x2000000
// 00678B7E 00678C83
// Location in screen buffer?
uint8 * dst = dpi->bits + (uint32)((startY >> (dpi->zoom_level)) * ((dpi->width >> dpi->zoom_level) + dpi->pitch) + (startX >> dpi->zoom_level));
// Find colour in colour table?
uint16 g1Index = palette_to_g1_offset[palette];
rct_g1_element * g1Element = &g1Elements[g1Index];
uint8 * g1Bits = g1Element->offset;
// Fill the rectangle with the colours from the colour table
for (sint32 i = 0; i < height >> dpi->zoom_level; i++)
{
uint8 * nextdst = dst + (dpi->width >> dpi->zoom_level) + dpi->pitch;
for (sint32 j = 0; j < (width >> dpi->zoom_level); j++)
{
*dst = g1Bits[*dst];
dst++;
}
dst = nextdst;
}
}
void X8DrawingContext::DrawLine(uint32 colour, sint32 x1, sint32 y1, sint32 x2, sint32 y2)
{
gfx_draw_line_software(_dpi, x1, y1, x2, y2, colour);
}
void X8DrawingContext::DrawSprite(uint32 image, sint32 x, sint32 y, uint32 tertiaryColour)
{
gfx_draw_sprite_software(_dpi, image, x, y, tertiaryColour);
}
void X8DrawingContext::DrawSpriteRawMasked(sint32 x, sint32 y, uint32 maskImage, uint32 colourImage)
{
gfx_draw_sprite_raw_masked_software(_dpi, x, y, maskImage, colourImage);
}
void X8DrawingContext::DrawSpriteSolid(uint32 image, sint32 x, sint32 y, uint8 colour)
{
uint8 palette[256];
memset(palette, colour, 256);
palette[0] = 0;
image &= 0x7FFFF;
gfx_draw_sprite_palette_set_software(_dpi, image | 0x20000000, x, y, palette, nullptr);
}
void X8DrawingContext::DrawGlyph(uint32 image, sint32 x, sint32 y, uint8 * palette)
{
gfx_draw_sprite_palette_set_software(_dpi, image, x, y, palette, nullptr);
}
void X8DrawingContext::SetDPI(rct_drawpixelinfo * dpi)
{
_dpi = dpi;
}
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