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raze-gles/source/common/2d/v_draw.cpp
Christoph Oelckers 2fa5e339fc - added GZDoom's 2D drawer to the project. 
So that for anything new I don't have to bother with the awful 2D interface Build provides.
2019-10-23 22:51:11 +02:00

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/*
** v_draw.cpp
** Draw patches and blocks to a canvas
**
**---------------------------------------------------------------------------
** Copyright 1998-2008 Randy Heit
** Copyright 2005-2019 Christoph Oelckers
** 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 "c_cvars.h"
#include "drawparms.h"
#include "templates.h"
#include "v_draw.h"
ScreenDummy* screen;
CUSTOM_CVAR(Int, uiscale, 0, CVAR_ARCHIVE | CVAR_NOINITCALL)
{
if (self < 0)
{
self = 0;
return;
}
//setsizeneeded = true;
}
CVAR(Int, vid_aspect, 0, 0)
int GetUIScale(int altval)
{
int scaleval;
if (altval > 0) scaleval = altval;
else if (uiscale == 0)
{
// Default should try to scale to 640x400
int vscale = screen->GetHeight() / 400;
int hscale = screen->GetWidth() / 640;
scaleval = clamp(vscale, 1, hscale);
}
else scaleval = uiscale;
// block scales that result in something larger than the current screen.
int vmax = screen->GetHeight() / 200;
int hmax = screen->GetWidth() / 320;
int max = std::max(vmax, hmax);
return std::max(1,std::min(scaleval, max));
}
// The new console font is twice as high, so the scaling calculation must factor that in.
int GetConScale(int altval)
{
int scaleval;
if (altval > 0) scaleval = (altval+1) / 2;
else if (uiscale == 0)
{
// Default should try to scale to 640x400
int vscale = screen->GetHeight() / 800;
int hscale = screen->GetWidth() / 1280;
scaleval = clamp(vscale, 1, hscale);
}
else scaleval = (uiscale+1) / 2;
// block scales that result in something larger than the current screen.
int vmax = screen->GetHeight() / 400;
int hmax = screen->GetWidth() / 640;
int max = std::max(vmax, hmax);
return std::max(1, std::min(scaleval, max));
}
// [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;
// Above minus 1 (or 1, if they are already 1)
int CleanXfac_1, CleanYfac_1, CleanWidth_1, CleanHeight_1;
//==========================================================================
//
// Draw parameter parsing
//
//==========================================================================
bool SetTextureParms(DrawParms *parms, FTexture *img, double xx, double yy)
{
if (img != NULL)
{
parms->x = xx;
parms->y = yy;
parms->texwidth = img->GetWidth();
parms->texheight = img->GetHeight();
if (parms->top == INT_MAX || parms->fortext)
{
parms->top = img->GetTopOffset();
}
if (parms->left == INT_MAX || parms->fortext)
{
parms->left = img->GetLeftOffset();
}
if (parms->destwidth == INT_MAX || parms->fortext)
{
parms->destwidth = img->GetWidth();
}
if (parms->destheight == INT_MAX || parms->fortext)
{
parms->destheight = img->GetHeight();
}
switch (parms->cleanmode)
{
default:
break;
case DTA_Clean:
parms->x = (parms->x - 160.0) * CleanXfac + (screen->GetWidth() * 0.5);
parms->y = (parms->y - 100.0) * CleanYfac + (screen->GetHeight() * 0.5);
parms->destwidth = parms->texwidth * CleanXfac;
parms->destheight = parms->texheight * CleanYfac;
break;
case DTA_CleanNoMove:
parms->destwidth = parms->texwidth * CleanXfac;
parms->destheight = parms->texheight * CleanYfac;
break;
case DTA_CleanNoMove_1:
parms->destwidth = parms->texwidth * CleanXfac_1;
parms->destheight = parms->texheight * CleanYfac_1;
break;
case DTA_Fullscreen:
parms->x = parms->y = 0;
break;
}
if (parms->virtWidth != screen->GetWidth() || parms->virtHeight != screen->GetHeight())
{
VirtualToRealCoords(parms->x, parms->y, parms->destwidth, parms->destheight,
parms->virtWidth, parms->virtHeight, parms->virtBottom, !parms->keepratio);
}
}
return false;
}
//==========================================================================
//
// template helpers
//
//==========================================================================
static void ListEnd(Va_List &tags)
{
va_end(tags.list);
}
static int ListGetInt(Va_List &tags)
{
return va_arg(tags.list, int);
}
static inline double ListGetDouble(Va_List &tags)
{
return va_arg(tags.list, double);
}
//==========================================================================
//
// Main taglist parsing
//
//==========================================================================
bool ParseDrawTextureTags(FTexture *img, double x, double y, uint32_t tag, Va_List& tags, DrawParms *parms, bool fortext)
{
int boolval;
int intval;
bool translationset = false;
bool fillcolorset = false;
if (!fortext)
{
if (img == NULL)
{
ListEnd(tags);
return false;
}
}
// Do some sanity checks on the coordinates.
if (x < -16383 || x > 16383 || y < -16383 || y > 16383)
{
ListEnd(tags);
return false;
}
parms->fortext = fortext;
parms->windowleft = 0;
parms->windowright = INT_MAX;
parms->dclip = screen->GetHeight();
parms->uclip = 0;
parms->lclip = 0;
parms->rclip = screen->GetWidth();
parms->left = INT_MAX;
parms->top = INT_MAX;
parms->destwidth = INT_MAX;
parms->destheight = INT_MAX;
parms->Alpha = 1.f;
parms->fillcolor = -1;
parms->colorOverlay = 0;
parms->alphaChannel = false;
parms->flipX = false;
parms->flipY = false;
parms->color = 0xffffffff;
//parms->shadowAlpha = 0;
parms->shadowColor = 0;
parms->virtWidth = screen->GetWidth();
parms->virtHeight = screen->GetHeight();
parms->keepratio = false;
parms->style.BlendOp = 255; // Dummy "not set" value
parms->masked = true;
parms->bilinear = false;
parms->desaturate = 0;
parms->cleanmode = DTA_Base;
parms->scalex = parms->scaley = 1;
parms->cellx = parms->celly = 0;
parms->maxstrlen = INT_MAX;
parms->virtBottom = false;
parms->srcx = 0.;
parms->srcy = 0.;
parms->srcwidth = 1.;
parms->srcheight = 1.;
parms->burn = false;
parms->monospace = EMonospacing::Off;
parms->spacing = 0;
parms->remap = 0;
// Parse the tag list for attributes. (For floating point attributes,
// consider that the C ABI dictates that all floats be promoted to
// doubles when passed as function arguments.)
while (tag != TAG_DONE)
{
switch (tag)
{
default:
ListGetInt(tags);
break;
case DTA_DestWidth:
assert(fortext == false);
if (fortext) return false;
parms->cleanmode = DTA_Base;
parms->destwidth = ListGetInt(tags);
break;
case DTA_DestWidthF:
assert(fortext == false);
if (fortext) return false;
parms->cleanmode = DTA_Base;
parms->destwidth = ListGetDouble(tags);
break;
case DTA_DestHeight:
assert(fortext == false);
if (fortext) return false;
parms->cleanmode = DTA_Base;
parms->destheight = ListGetInt(tags);
break;
case DTA_DestHeightF:
assert(fortext == false);
if (fortext) return false;
parms->cleanmode = DTA_Base;
parms->destheight = ListGetDouble(tags);
break;
case DTA_Clean:
boolval = ListGetInt(tags);
if (boolval)
{
parms->scalex = 1;
parms->scaley = 1;
parms->cleanmode = tag;
}
break;
case DTA_CleanNoMove:
boolval = ListGetInt(tags);
if (boolval)
{
parms->scalex = CleanXfac;
parms->scaley = CleanYfac;
parms->cleanmode = tag;
}
break;
case DTA_CleanNoMove_1:
boolval = ListGetInt(tags);
if (boolval)
{
parms->scalex = CleanXfac_1;
parms->scaley = CleanYfac_1;
parms->cleanmode = tag;
}
break;
case DTA_320x200:
boolval = ListGetInt(tags);
if (boolval)
{
parms->cleanmode = DTA_Base;
parms->scalex = 1;
parms->scaley = 1;
parms->virtWidth = 320;
parms->virtHeight = 200;
}
break;
case DTA_Bottom320x200:
boolval = ListGetInt(tags);
if (boolval)
{
parms->cleanmode = DTA_Base;
parms->scalex = 1;
parms->scaley = 1;
parms->virtWidth = 320;
parms->virtHeight = 200;
}
parms->virtBottom = true;
break;
case DTA_HUDRules:
intval = ListGetInt(tags);
parms->cleanmode = intval == HUD_HorizCenter ? DTA_HUDRulesC : DTA_HUDRules;
break;
case DTA_VirtualWidth:
parms->cleanmode = DTA_Base;
parms->virtWidth = ListGetInt(tags);
break;
case DTA_VirtualWidthF:
parms->cleanmode = DTA_Base;
parms->virtWidth = ListGetDouble(tags);
break;
case DTA_VirtualHeight:
parms->cleanmode = DTA_Base;
parms->virtHeight = ListGetInt(tags);
break;
case DTA_VirtualHeightF:
parms->cleanmode = DTA_Base;
parms->virtHeight = ListGetDouble(tags);
break;
case DTA_Fullscreen:
boolval = ListGetInt(tags);
if (boolval)
{
assert(fortext == false);
if (img == NULL) return false;
parms->cleanmode = DTA_Fullscreen;
parms->virtWidth = img->GetWidth();
parms->virtHeight = img->GetHeight();
}
break;
case DTA_Alpha:
parms->Alpha = (float)(std::min<double>(1., ListGetDouble(tags)));
break;
case DTA_AlphaChannel:
parms->alphaChannel = ListGetInt(tags);
break;
case DTA_FillColor:
parms->fillcolor = ListGetInt(tags);
if (parms->fillcolor != ~0u)
{
fillcolorset = true;
}
break;
case DTA_TranslationIndex:
parms->remap = ListGetInt(tags);
break;
case DTA_ColorOverlay:
parms->colorOverlay = ListGetInt(tags);
break;
case DTA_Color:
parms->color = ListGetInt(tags);
break;
case DTA_FlipX:
parms->flipX = ListGetInt(tags);
break;
case DTA_FlipY:
parms->flipY = ListGetInt(tags);
break;
case DTA_SrcX:
parms->srcx = ListGetDouble(tags) / img->GetWidth();
break;
case DTA_SrcY:
parms->srcy = ListGetDouble(tags) / img->GetHeight();
break;
case DTA_SrcWidth:
parms->srcwidth = ListGetDouble(tags) / img->GetWidth();
break;
case DTA_SrcHeight:
parms->srcheight = ListGetDouble(tags) / img->GetHeight();
break;
case DTA_TopOffset:
assert(fortext == false);
if (fortext) return false;
parms->top = ListGetInt(tags);
break;
case DTA_TopOffsetF:
assert(fortext == false);
if (fortext) return false;
parms->top = ListGetDouble(tags);
break;
case DTA_LeftOffset:
assert(fortext == false);
if (fortext) return false;
parms->left = ListGetInt(tags);
break;
case DTA_LeftOffsetF:
assert(fortext == false);
if (fortext) return false;
parms->left = ListGetDouble(tags);
break;
case DTA_CenterOffset:
assert(fortext == false);
if (fortext) return false;
if (ListGetInt(tags))
{
parms->left = img->GetWidth() * 0.5;
parms->top = img->GetHeight() * 0.5;
}
break;
case DTA_CenterBottomOffset:
assert(fortext == false);
if (fortext) return false;
if (ListGetInt(tags))
{
parms->left = img->GetWidth() * 0.5;
parms->top = img->GetHeight();
}
break;
case DTA_WindowLeft:
assert(fortext == false);
if (fortext) return false;
parms->windowleft = ListGetInt(tags);
break;
case DTA_WindowLeftF:
assert(fortext == false);
if (fortext) return false;
parms->windowleft = ListGetDouble(tags);
break;
case DTA_WindowRight:
assert(fortext == false);
if (fortext) return false;
parms->windowright = ListGetInt(tags);
break;
case DTA_WindowRightF:
assert(fortext == false);
if (fortext) return false;
parms->windowright = ListGetDouble(tags);
break;
case DTA_ClipTop:
parms->uclip = ListGetInt(tags);
if (parms->uclip < 0)
{
parms->uclip = 0;
}
break;
case DTA_ClipBottom:
parms->dclip = ListGetInt(tags);
if (parms->dclip > screen->GetHeight())
{
parms->dclip = screen->GetHeight();
}
break;
case DTA_ClipLeft:
parms->lclip = ListGetInt(tags);
if (parms->lclip < 0)
{
parms->lclip = 0;
}
break;
case DTA_ClipRight:
parms->rclip = ListGetInt(tags);
if (parms->rclip > screen->GetWidth())
{
parms->rclip = screen->GetWidth();
}
break;
case DTA_ShadowAlpha:
//parms->shadowAlpha = (float)std::min(1., ListGetDouble(tags));
break;
case DTA_ShadowColor:
parms->shadowColor = ListGetInt(tags);
break;
case DTA_Shadow:
boolval = ListGetInt(tags);
if (boolval)
{
//parms->shadowAlpha = 0.5;
parms->shadowColor = 0;
}
else
{
//parms->shadowAlpha = 0;
}
break;
case DTA_Masked:
parms->masked = ListGetInt(tags);
break;
case DTA_BilinearFilter:
parms->bilinear = ListGetInt(tags);
break;
case DTA_KeepRatio:
// I think this is a terribly misleading name, since it actually turns
// *off* aspect ratio correction.
parms->keepratio = ListGetInt(tags);
break;
case DTA_RenderStyle:
parms->style.AsDWORD = ListGetInt(tags);
break;
case DTA_LegacyRenderStyle: // mainly for ZScript which does not handle FRenderStyle that well.
parms->style = (ERenderStyle)ListGetInt(tags);
break;
case DTA_Desaturate:
parms->desaturate = ListGetInt(tags);
break;
case DTA_TextLen:
parms->maxstrlen = ListGetInt(tags);
break;
case DTA_CellX:
parms->cellx = ListGetInt(tags);
break;
case DTA_CellY:
parms->celly = ListGetInt(tags);
break;
case DTA_Monospace:
parms->monospace = ListGetInt(tags);
break;
case DTA_Spacing:
parms->spacing = ListGetInt(tags);
break;
case DTA_Burn:
parms->burn = true;
break;
}
tag = ListGetInt(tags);
}
ListEnd(tags);
if (parms->uclip >= parms->dclip || parms->lclip >= parms->rclip)
{
return false;
}
if (img != NULL)
{
SetTextureParms(parms, img, x, y);
if (parms->destwidth <= 0 || parms->destheight <= 0)
{
return false;
}
}
if (parms->style.BlendOp == 255)
{
if (fillcolorset)
{
if (parms->alphaChannel)
{
parms->style = STYLE_Shaded;
}
else if (parms->Alpha < 1.f)
{
parms->style = STYLE_TranslucentStencil;
}
else
{
parms->style = STYLE_Stencil;
}
}
else if (parms->Alpha < 1.f)
{
parms->style = STYLE_Translucent;
}
else
{
parms->style = STYLE_Normal;
}
}
return true;
}
//==========================================================================
//
// Coordinate conversion
//
//==========================================================================
void VirtualToRealCoords(double &x, double &y, double &w, double &h,
double vwidth, double vheight, bool vbottom, bool handleaspect)
{
float myratio = handleaspect ? ActiveRatio (screen->GetWidth(), screen->GetHeight()) : (4.0f / 3.0f);
// if 21:9 AR, map to 16:9 for all callers.
// this allows for black bars and stops the stretching of fullscreen images
if (myratio > 1.7f) {
myratio = 16.0f / 9.0f;
}
double right = x + w;
double bottom = y + h;
if (myratio > 1.334f)
{ // 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 = (x - vwidth * 0.5) * screen->GetWidth() * 960 / (vwidth * AspectBaseWidth(myratio)) + screen->GetWidth() * 0.5;
w = (right - vwidth * 0.5) * screen->GetWidth() * 960 / (vwidth * AspectBaseWidth(myratio)) + screen->GetWidth() * 0.5 - x;
}
else
{
x = x * screen->GetWidth() / vwidth;
w = right * screen->GetWidth() / vwidth - x;
}
if (AspectTallerThanWide(myratio))
{ // The target surface is 5:4
y = (y - vheight * 0.5) * screen->GetHeight() * 600 / (vheight * AspectBaseHeight(myratio)) + screen->GetHeight() * 0.5;
h = (bottom - vheight * 0.5) * screen->GetHeight() * 600 / (vheight * AspectBaseHeight(myratio)) + screen->GetHeight() * 0.5 - y;
if (vbottom)
{
y += (screen->GetHeight() - screen->GetHeight() * AspectMultiplier(myratio) / 48.0) * 0.5;
}
}
else
{
y = y * screen->GetHeight() / vheight;
h = bottom * screen->GetHeight() / vheight - y;
}
}
// Helper for ActiveRatio and CheckRatio. Returns the forced ratio type, or -1 if none.
int ActiveFakeRatio(int width, int height)
{
int fakeratio = -1;
if ((vid_aspect >= 1) && (vid_aspect <= 6))
{
// [SP] User wants to force aspect ratio; let them.
fakeratio = int(vid_aspect);
if (fakeratio == 3)
{
fakeratio = 0;
}
else if (fakeratio == 5)
{
fakeratio = 3;
}
}
else if (vid_aspect == 0)// && ViewportIsScaled43())
{
fakeratio = 0;
}
return fakeratio;
}
// Active screen ratio based on cvars and size
float ActiveRatio(int width, int height, float* trueratio)
{
static float forcedRatioTypes[] =
{
4 / 3.0f,
16 / 9.0f,
16 / 10.0f,
17 / 10.0f,
5 / 4.0f,
17 / 10.0f,
21 / 9.0f
};
float ratio = width / (float)height;
int fakeratio = ActiveFakeRatio(width, height);
if (trueratio)
*trueratio = ratio;
return (fakeratio != -1) ? forcedRatioTypes[fakeratio] : ratio;
}
// Tries to guess the physical dimensions of the screen based on the
// screen's pixel dimensions. Can return:
// 0: 4:3
// 1: 16:9
// 2: 16:10
// 3: 17:10
// 4: 5:4
// 5: 17:10 (redundant, never returned)
// 6: 21:9
int CheckRatio(int width, int height, int* trueratio)
{
float aspect = width / (float)height;
static std::pair<float, int> ratioTypes[] =
{
{ 21 / 9.0f , 6 },
{ 16 / 9.0f , 1 },
{ 17 / 10.0f , 3 },
{ 16 / 10.0f , 2 },
{ 4 / 3.0f , 0 },
{ 5 / 4.0f , 4 },
{ 0.0f, 0 }
};
int ratio = ratioTypes[0].second;
float distance = fabs(ratioTypes[0].first - aspect);
for (int i = 1; ratioTypes[i].first != 0.0f; i++)
{
float d = fabs(ratioTypes[i].first - aspect);
if (d < distance)
{
ratio = ratioTypes[i].second;
distance = d;
}
}
int fakeratio = ActiveFakeRatio(width, height);
if (fakeratio == -1)
fakeratio = ratio;
if (trueratio)
*trueratio = ratio;
return fakeratio;
}
int AspectBaseWidth(float aspect)
{
return (int)round(240.0f * aspect * 3.0f);
}
int AspectBaseHeight(float aspect)
{
if (!AspectTallerThanWide(aspect))
return (int)round(200.0f * (320.0f / (AspectBaseWidth(aspect) / 3.0f)) * 3.0f);
else
return (int)round((200.0f * (4.0f / 3.0f)) / aspect * 3.0f);
}
double AspectPspriteOffset(float aspect)
{
if (!AspectTallerThanWide(aspect))
return 0.0;
else
return ((4.0 / 3.0) / aspect - 1.0) * 97.5;
}
int AspectMultiplier(float aspect)
{
if (!AspectTallerThanWide(aspect))
return (int)round(320.0f / (AspectBaseWidth(aspect) / 3.0f) * 48.0f);
else
return (int)round(200.0f / (AspectBaseHeight(aspect) / 3.0f) * 48.0f);
}
bool AspectTallerThanWide(float aspect)
{
return aspect < 1.333f;
}
void ScaleWithAspect(int& w, int& h, int Width, int Height)
{
int resRatio = CheckRatio(Width, Height);
int screenRatio;
CheckRatio(w, h, &screenRatio);
if (resRatio == screenRatio)
return;
double yratio;
switch (resRatio)
{
case 0: yratio = 4. / 3.; break;
case 1: yratio = 16. / 9.; break;
case 2: yratio = 16. / 10.; break;
case 3: yratio = 17. / 10.; break;
case 4: yratio = 5. / 4.; break;
case 6: yratio = 21. / 9.; break;
default: return;
}
double y = w / yratio;
if (y > h)
w = static_cast<int>(h * yratio);
else
h = static_cast<int>(y);
}
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