raze/source/glbackend/gl_texture.cpp

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2019-10-20 06:07:12 +00:00
/*
** gl_texture.cpp
** high level GL texture interface
**
**---------------------------------------------------------------------------
** Copyright 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.
**---------------------------------------------------------------------------
**
**
*/
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#include "palette.h"
#include "build.h"
#include "hightile.h"
#include "polymost.h"
#include "textures.h"
#include "bitmap.h"
#include "v_font.h"
#include "../../glbackend/glbackend.h"
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// Test CVARs.
CVAR(Int, fixpalette, -1, 0)
CVAR(Int, fixpalswap, -1, 0)
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template<class T>
void FlipNonSquareBlock(T* dst, const T* src, int x, int y, int srcpitch)
{
for (int i = 0; i < x; ++i)
{
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for (int j = 0; j < y; ++j)
{
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dst[i * y + j] = src[i + j * srcpitch];
}
}
}
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//===========================================================================
//
// Create an indexed version of the requested texture
//
//===========================================================================
FHardwareTexture* GLInstance::CreateIndexedTexture(FTexture* tex)
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{
auto siz = tex->GetSize();
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const uint8_t* p = tex->Get8BitPixels();
TArray<uint8_t> store(siz.x * siz.y, true);
if (!p)
{
tex->Create8BitPixels(store.Data());
p = store.Data();
}
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auto glpic = GLInterface.NewTexture();
glpic->CreateTexture(siz.x, siz.y, FHardwareTexture::Indexed, false);
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TArray<uint8_t> flipped(siz.x * siz.y, true);
FlipNonSquareBlock(flipped.Data(), p, siz.y, siz.x, siz.y);
glpic->LoadTexture(flipped.Data());
return glpic;
}
//===========================================================================
//
// Create a true color version of the requested tile
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//
//===========================================================================
FHardwareTexture* GLInstance::CreateTrueColorTexture(FTexture* tex, int palid, bool checkfulltransparency, bool rgb8bit)
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{
auto palette = palid < 0? nullptr : palmanager.GetPaletteData(palid);
if (palid >= 0 && palette == nullptr) return nullptr;
auto texbuffer = tex->CreateTexBuffer(palette, checkfulltransparency? 0: CTF_ProcessData);
// Check if the texture is fully transparent. When creating a brightmap such textures can be discarded.
if (checkfulltransparency)
{
int siz = texbuffer.mWidth * texbuffer.mHeight * 4;
bool found = false;
for (int i = 3; i < siz; i+=4)
{
if (texbuffer.mBuffer[i] > 0)
{
found = true;
break;
}
}
if (!found) return nullptr;
}
auto glpic = GLInterface.NewTexture();
if (!rgb8bit)
glpic->CreateTexture(texbuffer.mWidth, texbuffer.mHeight, FHardwareTexture::TrueColor, true);
else
glpic->CreateTexture(texbuffer.mWidth, texbuffer.mHeight, FHardwareTexture::Brightmap, false); // Use a more memory friendly format for simple brightmaps.
glpic->LoadTexture(texbuffer.mBuffer);
return glpic;
}
//===========================================================================
//
// Retrieve the texture to be used.
//
//===========================================================================
FHardwareTexture* GLInstance::LoadTexture(FTexture* tex, int textype, int palid)
{
if (textype == TT_INDEXED) palid = -1;
auto phwtex = tex->GetHardwareTexture(palid);
if (phwtex) return *phwtex;
FHardwareTexture *hwtex;
if (textype == TT_INDEXED)
hwtex = CreateIndexedTexture(tex);
else
hwtex = CreateTrueColorTexture(tex, textype == TT_HICREPLACE? -1 : palid, textype == TT_BRIGHTMAP, textype == TT_BRIGHTMAP);
if (hwtex) tex->SetHardwareTexture(palid, hwtex);
return hwtex;
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}
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//===========================================================================
//
// Sets a texture for rendering. This should be the ONLY place to bind in-game textures
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//
//===========================================================================
bool GLInstance::SetTextureInternal(int picnum, FTexture* tex, int palette, int method, int sampleroverride, FTexture *det, float detscale, FTexture *glow)
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{
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if (tex->GetWidth() <= 0 || tex->GetHeight() <= 0) return false;
int usepalette = fixpalette >= 0 ? fixpalette : curbasepal;
int usepalswap = fixpalswap >= 0 ? fixpalswap : palette;
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GLInterface.SetPalette(usepalette);
GLInterface.SetPalswap(usepalswap);
bool texbound[3] = {};
int MatrixChange = 0;
TextureType = hw_int_useindexedcolortextures? TT_INDEXED : TT_TRUECOLOR;
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int lookuppal = 0;
VSMatrix texmat;
GLInterface.SetBasepalTint(0xffffff);
auto& h = hictinting[palette];
bool applytint = false;
auto rep = (hw_hightile && !(h.f & HICTINT_ALWAYSUSEART)) ? tex->FindReplacement(palette) : nullptr;
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if (rep)
{
if (usepalette != 0)
{
// This is a global setting for the entire scene, so let's do it here, right at the start. (Fixme: Store this in a static table instead of reusing the same entry for all palettes.)
auto& hh = hictinting[MAXPALOOKUPS - 1];
// This sets a tinting color for global palettes, e.g. water or slime - only used for hires replacements (also an option for low-resource hardware where duplicating the textures may be problematic.)
GLInterface.SetBasepalTint(hh.tint);
}
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tex = rep->faces[0];
TextureType = TT_HICREPLACE;
if (rep->palnum != palette || (h.f & HICTINT_APPLYOVERALTPAL)) applytint = true;
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}
else
{
// Only look up the palette if we really want to use it (i.e. when creating a true color texture of an ART tile.)
if (TextureType == TT_TRUECOLOR)
{
// Tinting is not used on indexed textures
if (h.f & (HICTINT_ALWAYSUSEART | HICTINT_USEONART))
{
applytint = true;
if (!(h.f & HICTINT_APPLYOVERPALSWAP)) usepalswap = 0;
}
lookuppal = palmanager.LookupPalette(usepalette, usepalswap, false,fixpalette < 0? !!(curpaletteflags & Pal_Fullscreen) : 0);
}
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}
// This is intentionally the same value for both parameters. The shader does not use the same uniform for modulation and overlay colors.
if (applytint && h.f)
GLInterface.SetTinting(h.f, h.tint, h.tint);
else GLInterface.SetTinting(-1, 0xffffff, 0xffffff);
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// Load the main texture
auto mtex = LoadTexture(tex, TextureType, lookuppal);
if (mtex)
{
auto sampler = (method & DAMETH_CLAMPED) ? (sampleroverride != -1 ? sampleroverride : SamplerClampXY) : SamplerRepeat;
if (TextureType == TT_INDEXED)
{
sampler = sampler + SamplerNoFilterRepeat - SamplerRepeat;
}
UseDetailMapping(false);
UseGlowMapping(false);
UseBrightmaps(false);
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BindTexture(0, mtex, sampler);
// Needs a) testing and b) verification for correctness. This doesn't look like it makes sense.
if (rep && (rep->scale.x != 1.0f || rep->scale.y != 1.0f))
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{
//texmat.loadIdentity();
//texmat.scale(rep->scale.x, rep->scale.y, 1.0f);
//GLInterface.SetMatrix(Matrix_Texture, &texmat);
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}
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// Also load additional layers needed for this texture.
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if (hw_detailmapping && hw_hightile)
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{
float detscalex = detscale, detscaley = detscale;
if (!(method & DAMETH_MODEL))
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{
auto drep = tex->FindReplacement(DETAILPAL);
if (drep)
{
det = drep->faces[0];
detscalex = drep->scale.x;
detscaley = drep->scale.y;
}
}
if (det)
{
auto htex = LoadTexture(det, TT_HICREPLACE, 0);
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UseDetailMapping(true);
BindTexture(3, htex, SamplerRepeat);
texbound[0] = true;
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/* todo: instead of a matrix, just pass a two-component uniform. Using a full matrix here is problematic.
if (MatrixChange & 1) MatrixChange |= 2;
else texmat.loadIdentity();
if ((detscalex != 1.0f) || (detscaley != 1.0f))
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{
texmat.scale(detscalex, detscaley, 1.0f);
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MatrixChange |= 2;
}
if (MatrixChange & 2) GLInterface.SetMatrix(Matrix_Detail, &texmat);
*/
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}
}
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if (hw_glowmapping && hw_hightile)
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{
if (!(method & DAMETH_MODEL))
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{
auto drep = tex->FindReplacement(GLOWPAL);
if (drep)
{
glow = drep->faces[0];
}
}
if (glow)
{
auto htex = LoadTexture(glow, TT_HICREPLACE, 0);
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UseGlowMapping(true);
BindTexture(4, htex, SamplerRepeat);
texbound[1] = true;
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}
}
#if 1
if (!(tex->PicAnim.sf & PICANM_NOFULLBRIGHT_BIT) && !(globalflags & GLOBAL_NO_GL_FULLBRIGHT) && !tex->NoBrightmapFlag[usepalswap] && !(curpaletteflags & (Pal_Fullscreen|Pal_2D)))
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{
if (TextureType == TT_HICREPLACE)
{
auto brep = tex->FindReplacement(BRIGHTPAL);
if (brep)
{
LoadTexture(brep->faces[0], TT_HICREPLACE, 0);
UseBrightmaps(true);
BindTexture(5, mtex, sampler);
texbound[2] = true;
}
else
{
tex->PicAnim.sf |= PICANM_NOFULLBRIGHT_BIT;
}
}
else if (TextureType == TT_TRUECOLOR)
{
lookuppal = palmanager.LookupPalette(usepalette, usepalswap, true);
if (lookuppal >= 0)
{
auto htex = LoadTexture(tex, TT_BRIGHTMAP, lookuppal);
if (htex == nullptr)
{
// Flag the texture as not being brightmapped for the given palette
tex->NoBrightmapFlag.Set(usepalswap);
}
else
{
UseBrightmaps(true);
BindTexture(5, htex, sampler);
texbound[2] = true;
}
}
}
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}
if (!texbound[0]) UnbindTexture(3);
if (!texbound[1]) UnbindTexture(4);
if (!texbound[2]) UnbindTexture(5);
#endif
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}
else return false;
float al = 0.5f;
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if (TextureType == TT_HICREPLACE)
{
al = ((unsigned)picnum < MAXTILES && alphahackarray[picnum] != 0) ? alphahackarray[picnum] * (1.f / 255.f) :
(tex->alphaThreshold >= 0 ? tex->alphaThreshold * (1.f / 255.f) : 0.f);
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}
GLInterface.SetAlphaThreshold(al);
return true;
}
//===========================================================================
//
// Sets a named texture for 2D rendering. In this case the palette is
// a direct index into the palette map.
//
//===========================================================================
bool GLInstance::SetNamedTexture(FTexture* tex, int palette, int sampler)
{
auto mtex = LoadTexture(tex, palette>= 0? TT_TRUECOLOR : TT_HICREPLACE, palette);
if (!mtex) return false;
BindTexture(0, mtex, sampler);
GLInterface.SetAlphaThreshold(tex->isTranslucent()? 0.f : 0.5f);
return true;
}