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qzdoom-gpl/src/v_draw.cpp
Randy Heit e5572a1c4e - Updated lempar.c to v1.31. 
- Added .txt files to the list of types (wad, zip, and pk3) that can be
  loaded without listing them after -file.
- Fonts that are created by the ACS setfont command to wrap a texture now
  support animated textures.
- FON2 fonts can now use their full palette for CR_UNTRANSLATED when drawn
  with the hardware 2D path instead of being restricted to the game palette.
- Fixed: Toggling vid_vsync would reset the displayed fullscreen gamma to 1
  on a Radeon 9000.
- Added back the off-by-one palette handling, but in a much more limited
  scope than before. The skipped entry is assumed to always be at 248, and
  it is assumed that all Shader Model 1.4 cards suffer from this. That's
  because all SM1.4 cards are based on variants of the ATI R200 core, and the
  RV250 in a Radeon 9000 craps up like this. I see no reason to assume that
  other flavors of the R200 are any different. (Interesting note: With the
  Radeon 9000, D3DTADDRESS_CLAMP is an invalid address mode when using the
  debug Direct3D 9 runtime, but it works perfectly fine with the retail
  Direct3D 9 runtime.) (Insight: The R200 probably uses bytes for all its
  math inside pixel shaders. That would explain perfectly why I can't use
  constants greater than 1 with PS1.4 and why it can't do an exact mapping to
  every entry in the color palette.
- Fixed: The software shaded drawer did not work for 2D, because its selected
  "color"map was replaced with the identitymap before being used.
- Fixed: I cannot use Printf to output messages before the framebuffer was
  completely setup, meaning that Shader Model 1.4 cards could not change
  resolution.
- I have decided to let remap palettes specify variable alpha values for
  their colors. D3DFB no longer forces them to 255.
- Updated re2c to version 0.12.3.
- Fixed: A_Wander used threshold as a timer, when it should have used
  reactiontime.
- Fixed: A_CustomRailgun would not fire at all for actors without a target
  when the aim parameter was disabled.
- Made the warp command work in multiplayer, again courtesy of Karate Chris.
- Fixed: Trying to spawn a bot while not in a game made for a crashing time.
  (Patch courtesy of Karate Chris.)
- Removed some floating point math from hu_scores.cpp that somebody's GCC
  gave warnings for (not mine, though).
- Fixed: The SBarInfo drawbar command crashed if the sprite image was
  unavailable.
- Fixed: FString::operator=(const char *) did not release its old buffer when
  being assigned to the null string.
- The scanner no longer has an upper limit on the length of strings it
  accepts, though short strings will be faster than long ones.
- Moved all the text scanning functions into a class. Mainly, this means that
  multiple script scanner states can be stored without being forced to do so
  recursively. I think I might be taking advantage of that in the near
  future. Possibly. Maybe.
- Removed some potential buffer overflows from the decal parser.
- Applied Blzut3's SBARINFO update #9:
  * Fixed: When using even length values in drawnumber it would cap to a 98
    value instead of a 99 as intended.
  * The SBarInfo parser can now accept negatives for coordinates. This
    doesn't allow much right now, but later I plan to add better fullscreen
    hud support in which the negatives will be more useful. This also cleans
    up the source a bit since all calls for (x, y) coordinates are with the
    function getCoordinates().
- Added support for stencilling actors.
- Added support for non-black colors specified with DTA_ColorOverlay to the
  software renderer.
- Fixed: The inverse, gold, red, and green fixed colormaps each allocated
  space for 32 different colormaps, even though each only used the first one.
- Added two new blending flags to make reverse subtract blending more useful:
  STYLEF_InvertSource and STYLEF_InvertOverlay. These invert the color that
  gets blended with the background, since that seems like a good idea for
  reverse subtraction. They also work with the other two blending operations.
- Added subtract and reverse subtract blending operations to the renderer.
  Since the ERenderStyle enumeration was getting rather unwieldy, I converted
  it into a new FRenderStyle structure that lets each parameter of the
  blending equation be set separately. This simplified the set up for the
  blend quite a bit, and it means a number of new combinations are available
  by setting the parameters properly.


SVN r710 (trunk)
2008-01-25 23:57:44 +00:00

999 lines
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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);
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:
parms->keepratio = va_arg (tags, INTBOOL);
break;
case DTA_RenderStyle:
parms->style = ERenderStyle(va_arg (tags, int));
break;
}
tag = va_arg (tags, DWORD);
}
va_end (tags);
if (parms->virtWidth != Width || parms->virtHeight != Height)
{
int myratio = CheckRatio (Width, Height);
int right = parms->x + parms->destwidth;
int bottom = parms->y + parms->destheight;
if (myratio != 0 && myratio != 4 && !parms->keepratio)
{ // 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.
parms->x = Scale(parms->x - parms->virtWidth*FRACUNIT/2,
Width*960,
parms->virtWidth*BaseRatioSizes[myratio][0])
+ Width*FRACUNIT/2;
parms->destwidth = Scale(right - parms->virtWidth*FRACUNIT/2,
Width*960,
parms->virtWidth*BaseRatioSizes[myratio][0])
+ Width*FRACUNIT/2 - parms->x;
}
else
{
parms->x = Scale (parms->x, Width, parms->virtWidth);
parms->destwidth = Scale (right, Width, parms->virtWidth) - parms->x;
}
if (myratio != 0 && myratio == 4 && !parms->keepratio)
{ // The target surface is 5:4
parms->y = Scale(parms->y - parms->virtHeight*FRACUNIT/2,
Height*600,
parms->virtHeight*BaseRatioSizes[myratio][1])
+ Height*FRACUNIT/2;
parms->destheight = Scale(bottom - parms->virtHeight*FRACUNIT/2,
Height*600,
parms->virtHeight*BaseRatioSizes[myratio][1])
+ Height*FRACUNIT/2 - parms->y;
if (virtBottom)
{
parms->y += (Height - Height * BaseRatioSizes[myratio][3] / 48) << (FRACBITS - 1);
}
}
else
{
parms->y = Scale (parms->y, Height, parms->virtHeight);
parms->destheight = Scale (bottom, Height, parms->virtHeight) - parms->y;
}
}
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::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)
{
// Quick check for black.
if (realcolor == MAKEARGB(255,0,0,0))
{
palColor = 0;
}
else
{
palColor = ColorMatcher.Pick(RPART(realcolor), GPART(realcolor), BPART(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)
{
// Quick check for black.
if (realcolor == MAKEARGB(255,0,0,0))
{
palColor = 0;
}
else
{
palColor = ColorMatcher.Pick(RPART(realcolor), GPART(realcolor), BPART(realcolor));
}
}
Lock();
GetBuffer()[GetPitch() * y + x] = (BYTE)palColor;
Unlock();
}
/********************************/
/* */
/* 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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