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gzdoom-last-svn/src/v_draw.cpp
Christoph Oelckers f5930d3fb5 Update to ZDoom r905: 
- Added Martin Howe's morph system update.
- Added support for defining composite textures in HIRESTEX. It is not fully tested
  and right now can't do much more than the old TEXTUREx method.
- Added a few NULL pointer checks to the texture code.
- Made duplicate class names in DECORATE non-fatal. There is really no stability
  concern here and the worst that can happen is that the wrong actor is spawned.
  This was a constant hassle when testing with WADs that contain duplicate resources.
- Removed some GCC warnings.
- Fixed: MinGW doesn't have _get_pgmptr(), so it couldn't compile i_main.cpp.
- Fixed: MOD_WAVETABLE and MOD_SWSYNTH are not defined by w32api, so MinGW
  failed compiling the new MIDI code.
- Fixed: LocalSndInfo and LocalSndSeq in S_Start() need to be const char
  pointers, since "" is a constant.
- Fixed: parsecontext.h was missing a newline at the end of the file.
- Fixed: Timidity::Channel::mono, rpn, and nrpn were not initialized. In
  particular, this meant that every channel was almost certainly in mono mode,
  which can sound pretty bad if the song isn't meant to be played that way.
- Added bank numbers to the MIDI precaching for Timidity, since I guess I do
  need to care about banks, if even the Duke MIDIs use various banks.
- Fixed: snd_midiprecache only exists in Win32 builds, so gameconfigfile.cpp
  shouldn't unconditionally link against it.
- Fixed: pre_resample() was still disabled, and it left two samples at the end
  of the new wave data uninitialized.
- Moved the xmap table from timidity/tables.cpp to playmidi.cpp. Now I can get
  rid of timidity/tables.cpp, which conflicts in name with the main Doom
  tables.cpp. (And interestingly, VC++ automatically renamed the object file,
  so I wasn't aware of the problem with GCC.)
- Added a Gets function to the FileReader class which I planned to use
  to enable Timidity to read its config and sound patches from Zips. 
  I put this on hold though after finding out that the sound quality 
  isn't even near that of Timidity++.
- GCC-Fixes (FString::GetChars() for Printf calls)
- Added a dummy Weapon.NOLMS flag so that Skulltag weapons using this flag
  can be loaded
- Changed the MIDIStreamer to send the all notes off controller to each
  channel when restarting the song, rather than emitting a single note off
  event which only has 1 in 127 chance of being for a note that's playing
  on that channel. Then I decided it would probably be a good idea to reset
  all the controllers as well.
- Increasing the size of the internal Timidity stream buffer from 1/14 sec
  (copied from the OPL player) improved its sound dramatically, so apparently
  Timidity has issues with short stream buffers. It's now at 1/2 sec in
  length. However, there seems to be something weird going on with
  corazonazul_ff6boss.mid near the beginning where it stops and immediately
  restarts a guitar on the exact same note.
- Added a new sound debugging cvar: snd_drawoutput, which can show various
  oscilloscopes and spectrums.
- Eliminated some more global variables (onmobj, DoRipping, LastRipped,
  MissileActor, bulletpitch and linetarget.)
- Internal TiMidity now plays music. Unfortunately, it doesn't sound right. :(
- Changed the progdir global variable into an FString.

git-svn-id: http://mancubus.net/svn/hosted/gzdoom/trunk@90 b0f79afe-0144-0410-b225-9a4edf0717df
2008-04-12 18:59:23 +00:00

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/*
** v_draw.cpp
** Draw patches and blocks to a canvas
**
**---------------------------------------------------------------------------
** Copyright 1998-2008 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
#include <stdio.h>
#include <stdarg.h>
#include "doomtype.h"
#include "v_video.h"
#include "m_swap.h"
#include "r_defs.h"
#include "r_draw.h"
#include "r_things.h"
#include "r_translate.h"
#include "i_system.h"
#include "i_video.h"
#include "templates.h"
// [RH] Stretch values to make a 320x200 image best fit the screen
// without using fractional steppings
int CleanXfac, CleanYfac;
// [RH] Effective screen sizes that the above scale values give you
int CleanWidth, CleanHeight;
CVAR (Bool, hud_scale, false, CVAR_ARCHIVE);
// For routines that take RGB colors, cache the previous lookup in case there
// are several repetitions with the same color.
static int LastPal = -1;
static uint32 LastRGB;
static int PalFromRGB(uint32 rgb)
{
if (LastPal >= 0 && LastRGB == rgb)
{
return LastPal;
}
// Quick check for black and white.
if (rgb == MAKEARGB(255,0,0,0))
{
LastPal = GPalette.BlackIndex;
}
else if (rgb == MAKEARGB(255,255,255,255))
{
LastPal = GPalette.WhiteIndex;
}
else
{
LastPal = ColorMatcher.Pick(RPART(rgb), GPART(rgb), BPART(rgb));
}
LastRGB = rgb;
return LastPal;
}
void STACK_ARGS DCanvas::DrawTexture (FTexture *img, int x, int y, int tags_first, ...)
{
va_list tags;
va_start(tags, tags_first);
DrawTextureV(img, x, y, tags_first, tags);
}
void STACK_ARGS DCanvas::DrawTextureV(FTexture *img, int x, int y, uint32 tag, va_list tags)
{
FTexture::Span unmaskedSpan[2];
const FTexture::Span **spanptr, *spans;
static short bottomclipper[MAXWIDTH], topclipper[MAXWIDTH];
DrawParms parms;
if (!ParseDrawTextureTags(img, x, y, tag, tags, &parms, false))
{
return;
}
if (parms.masked)
{
spanptr = &spans;
}
else
{
spanptr = NULL;
}
if (APART(parms.colorOverlay) != 0)
{
// The software renderer cannot invert the source without inverting the overlay
// too. That means if the source is inverted, we need to do the reverse of what
// the invert overlay flag says to do.
INTBOOL invertoverlay = (parms.style.Flags & STYLEF_InvertOverlay);
if (parms.style.Flags & STYLEF_InvertSource)
{
invertoverlay = !invertoverlay;
}
if (invertoverlay)
{
parms.colorOverlay = PalEntry(parms.colorOverlay).InverseColor();
}
// Note that this overrides DTA_Translation in software, but not in hardware.
FDynamicColormap *colormap = GetSpecialLights(MAKERGB(255,255,255),
parms.colorOverlay & MAKEARGB(0,255,255,255), 0);
parms.translation = &colormap->Maps[(APART(parms.colorOverlay)*NUMCOLORMAPS/255)*256];
}
if (parms.translation != NULL)
{
dc_colormap = (lighttable_t *)parms.translation;
}
else
{
dc_colormap = identitymap;
}
fixedcolormap = dc_colormap;
ESPSResult mode = R_SetPatchStyle (parms.style, parms.alpha, 0, parms.fillcolor);
BYTE *destorgsave = dc_destorg;
dc_destorg = screen->GetBuffer();
fixed_t x0 = parms.x - Scale (parms.left, parms.destwidth, parms.texwidth);
fixed_t y0 = parms.y - Scale (parms.top, parms.destheight, parms.texheight);
if (mode != DontDraw)
{
const BYTE *pixels;
int stop4;
if (spanptr == NULL)
{ // Create a single span for forced unmasked images
spans = unmaskedSpan;
unmaskedSpan[0].TopOffset = 0;
unmaskedSpan[0].Length = img->GetHeight();
unmaskedSpan[1].TopOffset = 0;
unmaskedSpan[1].Length = 0;
}
fixed_t centeryback = centeryfrac;
centeryfrac = 0;
sprtopscreen = y0;
spryscale = parms.destheight / img->GetHeight();
// Fix precision errors that are noticeable at some resolutions
if (((y0 + parms.destheight) >> FRACBITS) > ((y0 + spryscale * img->GetHeight()) >> FRACBITS))
{
spryscale++;
}
sprflipvert = false;
dc_iscale = 0xffffffffu / (unsigned)spryscale;
dc_texturemid = FixedMul (-y0, dc_iscale);
fixed_t frac = 0;
fixed_t xiscale = DivScale32 (img->GetWidth(), parms.destwidth);
int x2 = (x0 + parms.destwidth) >> FRACBITS;
if (bottomclipper[0] != parms.dclip)
{
clearbufshort (bottomclipper, screen->GetWidth(), (short)parms.dclip);
}
if (parms.uclip != 0)
{
if (topclipper[0] != parms.uclip)
{
clearbufshort (topclipper, screen->GetWidth(), (short)parms.uclip);
}
mceilingclip = topclipper;
}
else
{
mceilingclip = zeroarray;
}
mfloorclip = bottomclipper;
if (parms.flipX)
{
frac = (img->GetWidth() << FRACBITS) - 1;
xiscale = -xiscale;
}
dc_x = x0 >> FRACBITS;
if (parms.windowleft > 0 || parms.windowright < parms.texwidth)
{
fixed_t xscale = parms.destwidth / parms.texwidth;
dc_x += (parms.windowleft * xscale) >> FRACBITS;
frac += parms.windowleft << FRACBITS;
x2 -= ((parms.texwidth - parms.windowright) * xscale) >> FRACBITS;
}
if (dc_x < parms.lclip)
{
frac += (parms.lclip - dc_x) * xiscale;
dc_x = parms.lclip;
}
if (x2 > parms.rclip)
{
x2 = parms.rclip;
}
if (parms.destheight < 32*FRACUNIT)
{
mode = DoDraw0;
}
if (mode == DoDraw0)
{
// One column at a time
stop4 = dc_x;
}
else // DoDraw1
{
// Up to four columns at a time
stop4 = x2 & ~3;
}
if (dc_x < x2)
{
while ((dc_x < stop4) && (dc_x & 3))
{
pixels = img->GetColumn (frac >> FRACBITS, spanptr);
R_DrawMaskedColumn (pixels, spans);
dc_x++;
frac += xiscale;
}
while (dc_x < stop4)
{
rt_initcols();
for (int zz = 4; zz; --zz)
{
pixels = img->GetColumn (frac >> FRACBITS, spanptr);
R_DrawMaskedColumnHoriz (pixels, spans);
dc_x++;
frac += xiscale;
}
rt_draw4cols (dc_x - 4);
}
while (dc_x < x2)
{
pixels = img->GetColumn (frac >> FRACBITS, spanptr);
R_DrawMaskedColumn (pixels, spans);
dc_x++;
frac += xiscale;
}
}
centeryfrac = centeryback;
}
R_FinishSetPatchStyle ();
dc_destorg = destorgsave;
if (ticdup != 0 && menuactive == MENU_Off)
{
NetUpdate ();
}
}
bool DCanvas::ParseDrawTextureTags (FTexture *img, int x, int y, DWORD tag, va_list tags, DrawParms *parms, bool hw) const
{
INTBOOL boolval;
int intval;
bool translationset = false;
bool virtBottom;
if (img == NULL || img->UseType == FTexture::TEX_Null)
{
return false;
}
virtBottom = false;
parms->texwidth = img->GetScaledWidth();
parms->texheight = img->GetScaledHeight();
parms->windowleft = 0;
parms->windowright = parms->texwidth;
parms->dclip = this->GetHeight();
parms->uclip = 0;
parms->lclip = 0;
parms->rclip = this->GetWidth();
parms->destwidth = parms->windowright << FRACBITS;
parms->destheight = parms->texheight << FRACBITS;
parms->top = img->GetScaledTopOffset();
parms->left = img->GetScaledLeftOffset();
parms->alpha = FRACUNIT;
parms->fillcolor = -1;
parms->remap = NULL;
parms->translation = NULL;
parms->colorOverlay = 0;
parms->alphaChannel = false;
parms->flipX = false;
parms->shadowAlpha = 0;
parms->shadowColor = 0;
parms->virtWidth = this->GetWidth();
parms->virtHeight = this->GetHeight();
parms->keepratio = false;
parms->style.BlendOp = 255; // Dummy "not set" value
parms->masked = true;
parms->bilinear = false;
parms->x = x << FRACBITS;
parms->y = y << FRACBITS;
// Parse the tag list for attributes
while (tag != TAG_DONE)
{
va_list *more_p;
DWORD data;
switch (tag)
{
case TAG_IGNORE:
default:
data = va_arg (tags, DWORD);
break;
case TAG_MORE:
more_p = va_arg (tags, va_list *);
va_end (tags);
#ifdef __GNUC__
__va_copy (tags, *more_p);
#else
tags = *more_p;
#endif
break;
case DTA_DestWidth:
parms->destwidth = va_arg (tags, int) << FRACBITS;
break;
case DTA_DestHeight:
parms->destheight = va_arg (tags, int) << FRACBITS;
break;
case DTA_Clean:
boolval = va_arg (tags, INTBOOL);
if (boolval)
{
parms->x = (parms->x - 160*FRACUNIT) * CleanXfac + (Width * (FRACUNIT/2));
parms->y = (parms->y - 100*FRACUNIT) * CleanYfac + (Height * (FRACUNIT/2));
parms->destwidth = parms->texwidth * CleanXfac * FRACUNIT;
parms->destheight = parms->texheight * CleanYfac * FRACUNIT;
}
break;
case DTA_CleanNoMove:
boolval = va_arg (tags, INTBOOL);
if (boolval)
{
parms->destwidth = parms->texwidth * CleanXfac * FRACUNIT;
parms->destheight = parms->texheight * CleanYfac * FRACUNIT;
}
break;
case DTA_320x200:
boolval = va_arg (tags, INTBOOL);
if (boolval)
{
parms->virtWidth = 320;
parms->virtHeight = 200;
}
break;
case DTA_Bottom320x200:
boolval = va_arg (tags, INTBOOL);
if (boolval)
{
parms->virtWidth = 320;
parms->virtHeight = 200;
}
virtBottom = true;
break;
case DTA_HUDRules:
{
bool xright = parms->x < 0;
bool ybot = parms->y < 0;
intval = va_arg (tags, int);
if (hud_scale)
{
parms->x *= CleanXfac;
if (intval == HUD_HorizCenter)
parms->x += Width * FRACUNIT / 2;
else if (xright)
parms->x = Width * FRACUNIT + parms->x;
parms->y *= CleanYfac;
if (ybot)
parms->y = Height * FRACUNIT + parms->y;
parms->destwidth = parms->texwidth * CleanXfac * FRACUNIT;
parms->destheight = parms->texheight * CleanYfac * FRACUNIT;
}
else
{
if (intval == HUD_HorizCenter)
parms->x += Width * FRACUNIT / 2;
else if (xright)
parms->x = Width * FRACUNIT + parms->x;
if (ybot)
parms->y = Height * FRACUNIT + parms->y;
}
}
break;
case DTA_VirtualWidth:
parms->virtWidth = va_arg (tags, int);
break;
case DTA_VirtualHeight:
parms->virtHeight = va_arg (tags, int);
break;
case DTA_Alpha:
parms->alpha = MIN<fixed_t> (FRACUNIT, va_arg (tags, fixed_t));
break;
case DTA_AlphaChannel:
parms->alphaChannel = va_arg (tags, INTBOOL);
break;
case DTA_FillColor:
parms->fillcolor = va_arg (tags, int);
break;
case DTA_Translation:
parms->remap = va_arg (tags, FRemapTable *);
break;
case DTA_ColorOverlay:
parms->colorOverlay = va_arg (tags, DWORD);
break;
case DTA_FlipX:
parms->flipX = va_arg (tags, INTBOOL);
break;
case DTA_TopOffset:
parms->top = va_arg (tags, int);
break;
case DTA_LeftOffset:
parms->left = va_arg (tags, int);
break;
case DTA_CenterOffset:
if (va_arg (tags, int))
{
parms->left = parms->texwidth / 2;
parms->top = parms->texheight / 2;
}
break;
case DTA_CenterBottomOffset:
if (va_arg (tags, int))
{
parms->left = parms->texwidth / 2;
parms->top = parms->texheight;
}
break;
case DTA_WindowLeft:
parms->windowleft = va_arg (tags, int);
break;
case DTA_WindowRight:
parms->windowright = va_arg (tags, int);
break;
case DTA_ClipTop:
parms->uclip = va_arg (tags, int);
if (parms->uclip < 0)
{
parms->uclip = 0;
}
break;
case DTA_ClipBottom:
parms->dclip = va_arg (tags, int);
if (parms->dclip > this->GetHeight())
{
parms->dclip = this->GetHeight();
}
break;
case DTA_ClipLeft:
parms->lclip = va_arg (tags, int);
if (parms->lclip < 0)
{
parms->lclip = 0;
}
break;
case DTA_ClipRight:
parms->rclip = va_arg (tags, int);
if (parms->rclip > this->GetWidth())
{
parms->rclip = this->GetWidth();
}
break;
case DTA_ShadowAlpha:
parms->shadowAlpha = MIN<fixed_t> (FRACUNIT, va_arg (tags, fixed_t));
break;
case DTA_ShadowColor:
parms->shadowColor = va_arg (tags, int);
break;
case DTA_Shadow:
boolval = va_arg (tags, INTBOOL);
if (boolval)
{
parms->shadowAlpha = FRACUNIT/2;
parms->shadowColor = 0;
}
else
{
parms->shadowAlpha = 0;
}
break;
case DTA_Masked:
parms->masked = va_arg (tags, INTBOOL);
break;
case DTA_BilinearFilter:
parms->bilinear = va_arg (tags, INTBOOL);
break;
case DTA_KeepRatio:
// I think this is a terribly misleading name, since it actually turns
// *off* aspect ratio correction.
parms->keepratio = va_arg (tags, INTBOOL);
break;
case DTA_RenderStyle:
parms->style = va_arg (tags, FRenderStyle);
break;
}
tag = va_arg (tags, DWORD);
}
va_end (tags);
if (parms->uclip >= parms->dclip || parms->lclip >= parms->rclip)
{
return false;
}
if (parms->virtWidth != Width || parms->virtHeight != Height)
{
VirtualToRealCoords(parms->x, parms->y, parms->destwidth, parms->destheight,
parms->virtWidth, parms->virtHeight, virtBottom, !parms->keepratio);
}
if (parms->destwidth <= 0 || parms->destheight <= 0)
{
return false;
}
if (parms->remap != NULL)
{
parms->translation = parms->remap->Remap;
}
if (parms->style.BlendOp == 255)
{
if (parms->fillcolor != -1)
{
if (parms->alphaChannel)
{
parms->style = STYLE_Shaded;
}
else if (parms->alpha < FRACUNIT)
{
parms->style = STYLE_TranslucentStencil;
}
else
{
parms->style = STYLE_Stencil;
}
}
else if (parms->alpha < FRACUNIT)
{
parms->style = STYLE_Translucent;
}
else
{
parms->style = STYLE_Normal;
}
}
return true;
}
void DCanvas::VirtualToRealCoords(fixed_t &x, fixed_t &y, fixed_t &w, fixed_t &h,
int vwidth, int vheight, bool vbottom, bool handleaspect) const
{
int myratio = handleaspect ? CheckRatio (Width, Height) : 0;
int right = x + w;
int bottom = y + h;
if (myratio != 0 && myratio != 4)
{ // The target surface is either 16:9 or 16:10, so expand the
// specified virtual size to avoid undesired stretching of the
// image. Does not handle non-4:3 virtual sizes. I'll worry about
// those if somebody expresses a desire to use them.
x = Scale(x - vwidth*FRACUNIT/2,
Width*960,
vwidth*BaseRatioSizes[myratio][0])
+ Width*FRACUNIT/2;
w = Scale(right - vwidth*FRACUNIT/2,
Width*960,
vwidth*BaseRatioSizes[myratio][0])
+ Width*FRACUNIT/2 - x;
}
else
{
x = Scale (x, Width, vwidth);
w = Scale (right, Width, vwidth) - x;
}
if (myratio == 4)
{ // The target surface is 5:4
y = Scale(y - vheight*FRACUNIT/2,
Height*600,
vheight*BaseRatioSizes[myratio][1])
+ Height*FRACUNIT/2;
h = Scale(bottom - vheight*FRACUNIT/2,
Height*600,
vheight*BaseRatioSizes[myratio][1])
+ Height*FRACUNIT/2 - y;
if (vbottom)
{
y += (Height - Height * BaseRatioSizes[myratio][3] / 48) << (FRACBITS - 1);
}
}
else
{
y = Scale (y, Height, vheight);
h = Scale (bottom, Height, vheight) - y;
}
}
void DCanvas::VirtualToRealCoordsInt(int &x, int &y, int &w, int &h,
int vwidth, int vheight, bool vbottom, bool handleaspect) const
{
x <<= FRACBITS;
y <<= FRACBITS;
w <<= FRACBITS;
h <<= FRACBITS;
VirtualToRealCoords(x, y, w, h, vwidth, vheight, vbottom, handleaspect);
x >>= FRACBITS;
y >>= FRACBITS;
w >>= FRACBITS;
h >>= FRACBITS;
}
void DCanvas::FillBorder (FTexture *img)
{
int myratio = CheckRatio (Width, Height);
if (myratio == 0)
{ // This is a 4:3 display, so no border to show
return;
}
int bordtop, bordbottom, bordleft, bordright, bord;
if (myratio & 4)
{ // Screen is taller than it is wide
bordleft = bordright = 0;
bord = Height - Height * BaseRatioSizes[myratio][3] / 48;
bordtop = bord / 2;
bordbottom = bord - bordtop;
}
else
{ // Screen is wider than it is tall
bordtop = bordbottom = 0;
bord = Width - Width * BaseRatioSizes[myratio][3] / 48;
bordleft = bord / 2;
bordright = bord - bordleft;
}
if (img != NULL)
{
FlatFill (0, 0, Width, bordtop, img); // Top
FlatFill (0, bordtop, bordleft, Height - bordbottom, img); // Left
FlatFill (Width - bordright, bordtop, Width, Height - bordbottom, img); // Right
FlatFill (0, Height - bordbottom, Width, Height, img); // Bottom
}
else
{
Clear (0, 0, Width, bordtop, 0, 0); // Top
Clear (0, bordtop, bordleft, Height - bordbottom, 0, 0); // Left
Clear (Width - bordright, bordtop, Width, Height - bordbottom, 0, 0); // Right
Clear (0, Height - bordbottom, Width, Height, 0, 0); // Bottom
}
}
void DCanvas::PUTTRANSDOT (int xx, int yy, int basecolor, int level)
{
static int oldyy;
static int oldyyshifted;
#if 0
if(xx < 32)
cc += 7-(xx>>2);
else if(xx > (finit_width - 32))
cc += 7-((finit_width-xx) >> 2);
// if(cc==oldcc) //make sure that we don't double fade the corners.
// {
if(yy < 32)
cc += 7-(yy>>2);
else if(yy > (finit_height - 32))
cc += 7-((finit_height-yy) >> 2);
// }
if(cc > cm && cm != NULL)
{
cc = cm;
}
else if(cc > oldcc+6) // don't let the color escape from the fade table...
{
cc=oldcc+6;
}
#endif
if (yy == oldyy+1)
{
oldyy++;
oldyyshifted += GetPitch();
}
else if (yy == oldyy-1)
{
oldyy--;
oldyyshifted -= GetPitch();
}
else if (yy != oldyy)
{
oldyy = yy;
oldyyshifted = yy * GetPitch();
}
BYTE *spot = GetBuffer() + oldyyshifted + xx;
DWORD *bg2rgb = Col2RGB8[1+level];
DWORD *fg2rgb = Col2RGB8[63-level];
DWORD fg = fg2rgb[basecolor];
DWORD bg = bg2rgb[*spot];
bg = (fg+bg) | 0x1f07c1f;
*spot = RGB32k[0][0][bg&(bg>>15)];
}
void DCanvas::DrawLine(int x0, int y0, int x1, int y1, int palColor, uint32 realcolor)
//void DrawTransWuLine (int x0, int y0, int x1, int y1, BYTE palColor)
{
const int WeightingScale = 0;
const int WEIGHTBITS = 6;
const int WEIGHTSHIFT = 16-WEIGHTBITS;
const int NUMWEIGHTS = (1<<WEIGHTBITS);
const int WEIGHTMASK = (NUMWEIGHTS-1);
if (palColor < 0)
{
palColor = PalFromRGB(realcolor);
}
Lock();
int deltaX, deltaY, xDir;
if (y0 > y1)
{
int temp = y0; y0 = y1; y1 = temp;
temp = x0; x0 = x1; x1 = temp;
}
PUTTRANSDOT (x0, y0, palColor, 0);
if ((deltaX = x1 - x0) >= 0)
{
xDir = 1;
}
else
{
xDir = -1;
deltaX = -deltaX;
}
if ((deltaY = y1 - y0) == 0)
{ // horizontal line
if (x0 > x1)
{
swap (x0, x1);
}
memset (GetBuffer() + y0*GetPitch() + x0, palColor, deltaX+1);
}
else if (deltaX == 0)
{ // vertical line
BYTE *spot = GetBuffer() + y0*GetPitch() + x0;
int pitch = GetPitch ();
do
{
*spot = palColor;
spot += pitch;
} while (--deltaY != 0);
}
else if (deltaX == deltaY)
{ // diagonal line.
BYTE *spot = GetBuffer() + y0*GetPitch() + x0;
int advance = GetPitch() + xDir;
do
{
*spot = palColor;
spot += advance;
} while (--deltaY != 0);
}
else
{
// line is not horizontal, diagonal, or vertical
fixed_t errorAcc = 0;
if (deltaY > deltaX)
{ // y-major line
fixed_t errorAdj = (((unsigned)deltaX << 16) / (unsigned)deltaY) & 0xffff;
if (xDir < 0)
{
if (WeightingScale == 0)
{
while (--deltaY)
{
errorAcc += errorAdj;
y0++;
int weighting = (errorAcc >> WEIGHTSHIFT) & WEIGHTMASK;
PUTTRANSDOT (x0 - (errorAcc >> 16), y0, palColor, weighting);
PUTTRANSDOT (x0 - (errorAcc >> 16) - 1, y0,
palColor, WEIGHTMASK - weighting);
}
}
else
{
while (--deltaY)
{
errorAcc += errorAdj;
y0++;
int weighting = ((errorAcc * WeightingScale) >> (WEIGHTSHIFT+8)) & WEIGHTMASK;
PUTTRANSDOT (x0 - (errorAcc >> 16), y0, palColor, weighting);
PUTTRANSDOT (x0 - (errorAcc >> 16) - 1, y0,
palColor, WEIGHTMASK - weighting);
}
}
}
else
{
if (WeightingScale == 0)
{
while (--deltaY)
{
errorAcc += errorAdj;
y0++;
int weighting = (errorAcc >> WEIGHTSHIFT) & WEIGHTMASK;
PUTTRANSDOT (x0 + (errorAcc >> 16), y0, palColor, weighting);
PUTTRANSDOT (x0 + (errorAcc >> 16) + xDir, y0,
palColor, WEIGHTMASK - weighting);
}
}
else
{
while (--deltaY)
{
errorAcc += errorAdj;
y0++;
int weighting = ((errorAcc * WeightingScale) >> (WEIGHTSHIFT+8)) & WEIGHTMASK;
PUTTRANSDOT (x0 + (errorAcc >> 16), y0, palColor, weighting);
PUTTRANSDOT (x0 + (errorAcc >> 16) + xDir, y0,
palColor, WEIGHTMASK - weighting);
}
}
}
}
else
{ // x-major line
fixed_t errorAdj = (((DWORD) deltaY << 16) / (DWORD) deltaX) & 0xffff;
if (WeightingScale == 0)
{
while (--deltaX)
{
errorAcc += errorAdj;
x0 += xDir;
int weighting = (errorAcc >> WEIGHTSHIFT) & WEIGHTMASK;
PUTTRANSDOT (x0, y0 + (errorAcc >> 16), palColor, weighting);
PUTTRANSDOT (x0, y0 + (errorAcc >> 16) + 1,
palColor, WEIGHTMASK - weighting);
}
}
else
{
while (--deltaX)
{
errorAcc += errorAdj;
x0 += xDir;
int weighting = ((errorAcc * WeightingScale) >> (WEIGHTSHIFT+8)) & WEIGHTMASK;
PUTTRANSDOT (x0, y0 + (errorAcc >> 16), palColor, weighting);
PUTTRANSDOT (x0, y0 + (errorAcc >> 16) + 1,
palColor, WEIGHTMASK - weighting);
}
}
}
PUTTRANSDOT (x1, y1, palColor, 0);
}
Unlock();
}
void DCanvas::DrawPixel(int x, int y, int palColor, uint32 realcolor)
{
if (palColor < 0)
{
palColor = PalFromRGB(realcolor);
}
Buffer[Pitch * y + x] = (BYTE)palColor;
}
//==========================================================================
//
// DCanvas :: Clear
//
// Set an area to a specified color.
//
//==========================================================================
void DCanvas::Clear (int left, int top, int right, int bottom, int palcolor, uint32 color)
{
int x, y;
BYTE *dest;
if (left == right || top == bottom)
{
return;
}
assert(left < right);
assert(top < bottom);
if (palcolor < 0)
{
if (APART(color) != 255)
{
Dim(color, APART(color)/255.f, left, top, right - left, bottom - top);
return;
}
palcolor = PalFromRGB(color);
}
dest = Buffer + top * Pitch + left;
x = right - left;
for (y = top; y < bottom; y++)
{
memset(dest, palcolor, x);
dest += Pitch;
}
}
/********************************/
/* */
/* Other miscellaneous routines */
/* */
/********************************/
//
// V_DrawBlock
// Draw a linear block of pixels into the view buffer.
//
void DCanvas::DrawBlock (int x, int y, int _width, int _height, const BYTE *src) const
{
int srcpitch = _width;
int destpitch;
BYTE *dest;
if (ClipBox (x, y, _width, _height, src, srcpitch))
{
return; // Nothing to draw
}
destpitch = Pitch;
dest = Buffer + y*Pitch + x;
do
{
memcpy (dest, src, _width);
src += srcpitch;
dest += destpitch;
} while (--_height);
}
//
// V_GetBlock
// Gets a linear block of pixels from the view buffer.
//
void DCanvas::GetBlock (int x, int y, int _width, int _height, BYTE *dest) const
{
const BYTE *src;
#ifdef RANGECHECK
if (x<0
||x+_width > Width
|| y<0
|| y+_height>Height)
{
I_Error ("Bad V_GetBlock");
}
#endif
src = Buffer + y*Pitch + x;
while (_height--)
{
memcpy (dest, src, _width);
src += Pitch;
dest += _width;
}
}
// Returns true if the box was completely clipped. False otherwise.
bool DCanvas::ClipBox (int &x, int &y, int &w, int &h, const BYTE *&src, const int srcpitch) const
{
if (x >= Width || y >= Height || x+w <= 0 || y+h <= 0)
{ // Completely clipped off screen
return true;
}
if (x < 0) // clip left edge
{
src -= x;
w += x;
x = 0;
}
if (x+w > Width) // clip right edge
{
w = Width - x;
}
if (y < 0) // clip top edge
{
src -= y*srcpitch;
h += y;
y = 0;
}
if (y+h > Height) // clip bottom edge
{
h = Height - y;
}
return false;
}
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