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openclonk/src/landscape/C4LandscapeRender.cpp

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/*
* OpenClonk, http://www.openclonk.org
*
* Copyright (c) 2011-2015, The OpenClonk Team and contributors
*
* Distributed under the terms of the ISC license; see accompanying file
* "COPYING" for details.
*
* "Clonk" is a registered trademark of Matthes Bender, used with permission.
* See accompanying file "TRADEMARK" for details.
*
* To redistribute this file separately, substitute the full license texts
* for the above references.
*/
#include "C4Include.h"
#include "C4LandscapeRender.h"
#include "C4Landscape.h"
#include "C4Texture.h"
#include "C4FoWRegion.h"
#include "C4GroupSet.h"
#include "C4Components.h"
#include "C4DrawGL.h"
#include "StdColors.h"
#include <algorithm>
#ifndef USE_CONSOLE
// Automatically reload shaders when changed at runtime?
#define AUTO_RELOAD_SHADERS
#ifdef _DEBUG
// Generate seperator textures into 3D texture so we can make sure that
// we are addressing textures using the right coordinates
#define DEBUG_SEPERATOR_TEXTURES
// Replace all textures by solid colors
//#define DEBUG_SOLID_COLOR_TEXTURES
#endif
// How much to look into each direction for bias
const int C4LR_BiasDistanceX = 7;
const int C4LR_BiasDistanceY = 7;
// Name used for the seperator texture
const char *const SEPERATOR_TEXTURE = "--SEP--";
C4LandscapeRenderGL::C4LandscapeRenderGL()
{
ZeroMem(Surfaces, sizeof(Surfaces));
ZeroMem(hMaterialTexture, sizeof(hMaterialTexture));
}
C4LandscapeRenderGL::~C4LandscapeRenderGL()
{
Clear();
}
bool C4LandscapeRenderGL::Init(int32_t iWidth, int32_t iHeight, C4TextureMap *pTexs, C4GroupSet *pGraphics)
{
Clear();
// Safe info
this->iWidth = iWidth;
this->iHeight = iHeight;
this->pTexs = pTexs;
// Allocate landscape textures
if (!InitLandscapeTexture())
{
LogFatal("[!] Could not initialize landscape texture!");
return false;
}
// Build texture, er, texture
if (!InitMaterialTexture(pTexs))
{
LogFatal("[!] Could not initialize landscape textures for rendering!");
return false;
}
// Load sclaer
if (!LoadScaler(pGraphics))
{
LogFatal("[!] Could not load scaler!");
return false;
}
// Load shader
if (!LoadShaders(pGraphics))
{
LogFatal("[!] Could not initialize landscape shader!");
return false;
}
return true;
}
bool C4LandscapeRenderGL::ReInit(int32_t iWidth, int32_t iHeight)
{
// Safe info
this->iWidth = iWidth;
this->iHeight = iHeight;
// Clear old landscape textures
for (int i = 0; i < C4LR_SurfaceCount; i++)
{
delete Surfaces[i];
Surfaces[i] = NULL;
}
// Allocate new landscape textures
if (!InitLandscapeTexture())
{
LogFatal("[!] Could not initialize landscape texture!");
return false;
}
return true;
}
void C4LandscapeRenderGL::Clear()
{
ClearShaders();
// free textures
int i;
for (i = 0; i < C4LR_SurfaceCount; i++)
{
delete Surfaces[i];
Surfaces[i] = NULL;
}
glDeleteTextures(C4LR_MipMapCount, hMaterialTexture);
std::fill_n(hMaterialTexture, C4LR_MipMapCount, 0);
}
bool C4LandscapeRenderGL::InitLandscapeTexture()
{
// Round up to nearest power of two
int iSfcWdt = 1, iSfcHgt = 1;
while(iSfcWdt < iWidth) iSfcWdt *= 2;
while(iSfcHgt < iHeight) iSfcHgt *= 2;
// One bit more of information to safe more space
if(iSfcWdt * 3 / 4 >= iWidth) iSfcWdt = iSfcWdt * 3 / 4;
if(iSfcHgt * 3 / 4 >= iHeight) iSfcHgt = iSfcHgt * 3 / 4;
// Create our surfaces
for(int i = 0; i < C4LR_SurfaceCount; i++)
{
Surfaces[i] = new C4Surface();
if(!Surfaces[i]->Create(iSfcWdt, iSfcHgt))
return false;
}
return true;
}
bool C4LandscapeRenderGL::InitMaterialTexture(C4TextureMap *pTexs)
{
// Populate our map with all needed textures
MaterialTextureMap.push_back(StdCopyStrBuf(""));
AddTexturesFromMap(pTexs);
// Determine depth to use
iMaterialTextureDepth = 1;
while(iMaterialTextureDepth < 2*int32_t(MaterialTextureMap.size()))
iMaterialTextureDepth <<= 1;
int32_t iNormalDepth = iMaterialTextureDepth / 2;
// Find the largest texture
C4Texture *pTex; C4Surface *pRefSfc = NULL;
for(int iTexIx = 0; (pTex = pTexs->GetTexture(pTexs->GetTexture(iTexIx))); iTexIx++)
if(C4Surface *pSfc = pTex->Surface32)
if (!pRefSfc || pRefSfc->Wdt < pSfc->Wdt || pRefSfc->Hgt < pSfc->Hgt)
pRefSfc = pSfc;
if(!pRefSfc)
return false;
// Get size for our textures. We might be limited by hardware
int iTexWdt = pRefSfc->Wdt, iTexHgt = pRefSfc->Hgt;
GLint iMaxTexSize;
glGetIntegerv(GL_MAX_3D_TEXTURE_SIZE, &iMaxTexSize);
if (iTexWdt > iMaxTexSize || iTexHgt > iMaxTexSize)
{
iTexWdt = Min(iTexWdt, iMaxTexSize);
iTexHgt = Min(iTexHgt, iMaxTexSize);
LogF(" gl: Material textures too large, GPU only supports %dx%d! Cropping might occur!", iMaxTexSize, iMaxTexSize);
}
if(iMaterialTextureDepth >= iMaxTexSize)
{
LogF(" gl: Too many material textures! GPU only supports 3D texture depth of %d!", iMaxTexSize);
return false;
}
iMaterialWidth = iTexWdt;
iMaterialHeight = iTexHgt;
// Compose together data of all textures
const int iBytesPP = pRefSfc->byBytesPP;
const int iTexSize = iTexWdt * iTexHgt * iBytesPP;
const int iSize = iTexSize * iMaterialTextureDepth;
BYTE *pData = new BYTE [iSize];
for(int i = 0; i < iMaterialTextureDepth; i++)
{
BYTE *p = pData + i * iTexSize;
// Get texture at position
StdStrBuf Texture;
bool fNormal = i >= iNormalDepth;
if(i < int32_t(MaterialTextureMap.size()))
Texture.Ref(MaterialTextureMap[i]);
else if(fNormal && i < iNormalDepth + int32_t(MaterialTextureMap.size()))
Texture.Format("%s_NRM", MaterialTextureMap[i-iNormalDepth].getData());
// Try to find the texture
C4Texture *pTex; C4Surface *pSurface;
if((pTex = pTexs->GetTexture(Texture.getData())) && (pSurface = pTex->Surface32))
{
#ifdef DEBUG_SOLID_COLOR_TEXTURES
// Just write a solid color that depends on the texture index
DWORD *texdata = reinterpret_cast<DWORD *>(p);
for (int y = 0; y < iTexHgt; ++y)
for (int x = 0; x < iTexWdt; ++x)
*texdata++ = RGBA((iTex & 48), (iTex & 3) * 16, (i & 12) * 4, 255);
continue;
#else
if(pSurface->iTexX != 1 || pSurface->iTexY != 1)
Log(" gl: Halp! Material texture is fragmented!");
else
{
// Size recheck
if(pSurface->Wdt != iTexWdt || pSurface->Hgt != iTexHgt)
LogF(" gl: texture %s size mismatch (%dx%d vs %dx%d)!", Texture.getData(), pSurface->Wdt, pSurface->Hgt, iTexWdt, iTexHgt);
// Copy bytes
DWORD *texdata = reinterpret_cast<DWORD *>(p);
pSurface->Lock();
for (int y = 0; y < iTexHgt; ++y)
for (int x = 0; x < iTexWdt; ++x)
*texdata++ = pSurface->GetPixDw(x % pSurface->Wdt, y % pSurface->Hgt, false);
pSurface->Unlock();
continue;
}
#endif
}
// Seperator texture?
if(SEqual(Texture.getData(), SEPERATOR_TEXTURE))
{
// Make some ugly stripes
DWORD *texdata = reinterpret_cast<DWORD *>(p);
for (int y = 0; y < iTexHgt; ++y)
for (int x = 0; x < iTexWdt; ++x)
*texdata++ = ((x + y) % 32 < 16 ? RGBA(255, 0, 0, 255) : RGBA(0, 255, 255, 255));
continue;
}
// If we didn't "continue" yet, we haven't written the texture yet.
// Make color texture transparent, and normal texture flat.
memset(p, fNormal ? 127 : 0, iTexSize);
}
// Clear error error(s?)
while(glGetError()) {}
// Alloc 3D textures
glEnable(GL_TEXTURE_3D);
glGenTextures(C4LR_MipMapCount, hMaterialTexture);
// Generate textures (mipmaps too!)
int iSizeSum = 0;
BYTE *pLastData = new BYTE [iSize / 4];
for(int iMMLevel = 0; iMMLevel < C4LR_MipMapCount; iMMLevel++)
{
// Scale the texture down for mip-mapping
if(iMMLevel) {
BYTE *pOut = pData;
BYTE *pIn[4] = {
pLastData, pLastData + iBytesPP,
pLastData + iBytesPP * iTexWdt, pLastData + iBytesPP * iTexWdt + iBytesPP
};
for (int i = 0; i < iMaterialTextureDepth; ++i)
for (int y = 0; y < iTexHgt / 2; ++y)
{
for (int x = 0; x < iTexWdt / 2; ++x)
{
for (int j = 0; j < iBytesPP; j++)
{
unsigned int s = 0;
s += *pIn[0]++; s += 3 * *pIn[1]++; s += 3 * *pIn[2]++; s += *pIn[3]++;
*pOut++ = BYTE(s / 8);
}
pIn[0] += iBytesPP; pIn[1] += iBytesPP; pIn[2] += iBytesPP; pIn[3] += iBytesPP;
}
pIn[0] += iBytesPP * iTexWdt; pIn[1] += iBytesPP * iTexWdt;
pIn[2] += iBytesPP * iTexWdt; pIn[3] += iBytesPP * iTexWdt;
}
iTexWdt /= 2; iTexHgt /= 2;
}
// Select texture
glBindTexture(GL_TEXTURE_3D, hMaterialTexture[iMMLevel]);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
// We fully expect to tile these
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// Make it happen!
glTexImage3D(GL_TEXTURE_3D, 0, 4, iTexWdt, iTexHgt, iMaterialTextureDepth, 0, GL_BGRA,
iBytesPP == 2 ? GL_UNSIGNED_SHORT_4_4_4_4_REV : GL_UNSIGNED_INT_8_8_8_8_REV,
pData);
// Exchange buffers
BYTE *tmp = pLastData;
pLastData = pData;
pData = tmp;
// Statistics
iSizeSum += iTexWdt * iTexHgt * iMaterialTextureDepth * iBytesPP;
}
// Dispose of data
delete [] pData;
delete [] pLastData;
glDisable(GL_TEXTURE_3D);
// Check whether we were successful
if(int err = glGetError())
{
LogF(" gl: Could not load textures (error %d)", err);
return false;
}
// Announce the good news
LogF(" gl: Texturing uses %d slots at %dx%d, %d levels (%d MB total)",
static_cast<int>(MaterialTextureMap.size()),
iMaterialWidth, iMaterialHeight,
C4LR_MipMapCount,
iSizeSum / 1000000);
return true;
}
C4Rect C4LandscapeRenderGL::GetAffectedRect(C4Rect Rect)
{
Rect.Enlarge(C4LR_BiasDistanceX, C4LR_BiasDistanceY);
return Rect;
}
void C4LandscapeRenderGL::Update(C4Rect To, C4Landscape *pSource)
{
// clip to landscape size
To.Intersect(C4Rect(0,0,iWidth,iHeight));
// everything clipped?
if (To.Wdt<=0 || To.Hgt<=0) return;
// Lock surfaces
// We clear the affected region here because ClearBoxDw allocates the
// main memory buffer for the box, so that only that box needs to be
// sent to the gpu, and not the whole texture, or every pixel
// separately. It's an important optimization.
for (int i = 0; i < C4LR_SurfaceCount; i++)
{
if (!Surfaces[i]->Lock()) return;
Surfaces[i]->ClearBoxDw(To.x, To.y, To.Wdt, To.Hgt);
}
// Initialize up & down placement arrays:
// Calculate the placement sums for the first line in the rectangle only. For the consecutive lines, it is updated
// for each line in the below for-loop.
int x, y;
int *placementSumsUp = new int [To.Wdt * 2];
int *placementSumsDown = placementSumsUp + To.Wdt;
for(x = 0; x < To.Wdt; x++)
{
placementSumsUp[x] = 0;
placementSumsDown[x] = 0;
for(y = 1; y <= Min(C4LR_BiasDistanceY, To.y); y++)
placementSumsUp[x] += pSource->_GetPlacement(To.x+x, To.y-y);
for(y = 1; y <= Min(C4LR_BiasDistanceY, iHeight - 1 - To.y); y++)
placementSumsDown[x] += pSource->_GetPlacement(To.x+x, To.y+y);
}
// Get tex refs (shortcut, we will use them quite heavily)
C4TexRef *texture[C4LR_SurfaceCount];
x = y = 0;
for(int i = 0; i < C4LR_SurfaceCount; i++)
Surfaces[i]->GetTexAt(&texture[i], x, y);
// Go through it from top to bottom
for(y = 0; y < To.Hgt; y++)
{
// Initialize left & right placement for the left-most pixel. Will be updated in the below loop for every pixel
// in the line
int placementSumLeft = 0;
int placementSumRight = 0;
for(x = 1; x <= Min(C4LR_BiasDistanceX, To.x); x++)
placementSumLeft += pSource->_GetPlacement(To.x-x,To.y+y);
for(x = 1; x <= Min(C4LR_BiasDistanceX, iWidth - 1 - To.x ); x++)
placementSumRight += pSource->_GetPlacement(To.x+x,To.y+y);
for(x = 0; x < To.Wdt; x++)
{
int pixel = pSource->_GetPix(To.x+x, To.y+y);
int placement = pSource->_GetPlacement(To.x+x, To.y+y);
int horizontalBias = Max(0, placement * C4LR_BiasDistanceX - placementSumRight) -
Max(0, placement * C4LR_BiasDistanceX - placementSumLeft);
int verticalBias = Max(0, placement * C4LR_BiasDistanceY - placementSumsDown[x]) -
Max(0, placement * C4LR_BiasDistanceY - placementSumsUp[x]);
// Maximum placement differences that make a difference in the result, after which we are at the limits of
// what can be packed into a byte
const int maximumPlacementDifference = 40;
int horizontalBiasScaled = Clamp(horizontalBias * 127 / maximumPlacementDifference / C4LR_BiasDistanceX + 128, 0, 255);
int verticalBiasScaled = Clamp(verticalBias * 127 / maximumPlacementDifference / C4LR_BiasDistanceY + 128, 0, 255);
// Collect data to save per pixel
unsigned char data[C4LR_SurfaceCount * 4];
memset(data, 0, sizeof(data));
data[C4LR_Material] = pixel;
data[C4LR_BiasX] = horizontalBiasScaled;
data[C4LR_BiasY] = verticalBiasScaled;
data[C4LR_Scaler] = CalculateScalerBitmask(x, y, To, pSource);
data[C4LR_Place] = placement;
for(int i = 0; i < C4LR_SurfaceCount; i++)
texture[i]->SetPix4(To.x+x, To.y+y,
RGBA(data[i*4+0], data[i*4+1], data[i*4+2], data[i*4+3]));
// Update left & right for next pixel in line
if(x + To.x + 1 < iWidth)
placementSumRight -= pSource->_GetPlacement(To.x+x + 1, To.y+y);
if(To.x+x + C4LR_BiasDistanceX + 1 < iWidth)
placementSumRight += pSource->_GetPlacement(To.x+x + C4LR_BiasDistanceX + 1, To.y+y);
placementSumLeft += placement;
if(To.x+x - C4LR_BiasDistanceX >= 0)
placementSumLeft -= pSource->_GetPlacement(To.x+x - C4LR_BiasDistanceX, To.y+y);
// Update up & down arrays (for next line already)
if(To.y+y + 1 < iHeight)
placementSumsDown[x] -= pSource->_GetPlacement(To.x+x, To.y+y + 1);
if(To.y+y + C4LR_BiasDistanceY + 1 < iHeight)
placementSumsDown[x] += pSource->_GetPlacement(To.x+x, To.y+y + C4LR_BiasDistanceY + 1);
placementSumsUp[x] += placement;
if(To.y+y - C4LR_BiasDistanceY >= 0) {
placementSumsUp[x] -= pSource->_GetPlacement(To.x+x, To.y+y - C4LR_BiasDistanceY);
}
}
}
// done
delete[] placementSumsUp;
for (int i = 0; i < C4LR_SurfaceCount; i++)
Surfaces[i]->Unlock();
}
/** Returns the data used for the scaler shader for the given pixel. It is a 8-bit bitmask. The bits stand for the 8
neighbouring pixels in this order:
1 2 3
4 . 5
6 7 8
... and denote whether the pixels belongs to the same group as this pixel.
*/
int C4LandscapeRenderGL::CalculateScalerBitmask(int x, int y, C4Rect To, C4Landscape *pSource)
{
int pixel = pSource->_GetPix(To.x+x, To.y+y);
int placement = pSource->_GetPlacement(To.x+x, To.y+y);
int neighbours[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
if(To.y+y > 0)
{
if(To.x+x > 0)
neighbours[0] = pSource->_GetPix(To.x+x-1, To.y+y-1);
neighbours[1] = pSource->_GetPix(To.x+x, To.y+y-1);
if(To.x+x < iWidth-1)
neighbours[2] = pSource->_GetPix(To.x+x+1, To.y+y-1);
}
if(To.x+x > 0)
neighbours[3] = pSource->_GetPix(To.x+x-1, To.y+y);
if(To.x+x < iWidth-1)
neighbours[4] = pSource->_GetPix(To.x+x+1, To.y+y);
if(To.y+y < iHeight-1)
{
if(To.x+x > 0)
neighbours[5] = pSource->_GetPix(To.x+x-1, To.y+y+1);
neighbours[6] = pSource->_GetPix(To.x+x, To.y+y+1);
if(To.x+x < iWidth-1)
neighbours[7] = pSource->_GetPix(To.x+x+1, To.y+y+1);
}
// Look for highest-placement material in our surroundings
int maxPixel = pixel, maxPlacement = placement;
for(int i = 0; i < 8; i++)
{
int tempPlacement = MatPlacement(PixCol2Mat(neighbours[i]));
if(tempPlacement > maxPlacement || (tempPlacement == maxPlacement && neighbours[i] > maxPixel) )
{
maxPixel = neighbours[i];
maxPlacement = tempPlacement;
}
}
// Scaler calculation depends on whether this is the highest-placement material around
int scaler = 0;
if(maxPixel == pixel)
{
// If yes, we consider all other materials as "other"
for(int i = 0; i < 8; i++)
if(neighbours[i] == pixel)
scaler += (1<<i);
} else {
// Otherwise, we *only* consider the highest-placement material as "other"
for(int i = 0; i < 8; i++)
if(neighbours[i] != maxPixel)
scaler += (1<<i);
}
return scaler;
}
const char *C4LandscapeRenderGL::UniformNames[C4LRU_Count+1];
bool C4LandscapeRenderGL::LoadShader(C4GroupSet *pGroups, C4Shader& shader, const char* name, int ssc)
{
// Create vertex shader (hard-coded)
shader.AddVertexDefaults();
hLandscapeTexCoord = shader.AddTexCoord("landscapeCoord");
if(ssc & C4SSC_LIGHT) hLightTexCoord = shader.AddTexCoord("lightCoord");
// Then load slices for fragment shader
shader.AddFragmentSlice(-1, "#define OPENCLONK\n#define LANDSCAPE");
if(ssc & C4SSC_LIGHT) shader.AddFragmentSlice(-1, "#define HAVE_LIGHT"); // sample light from light texture
shader.LoadSlices(pGroups, "CommonShader.glsl");
shader.LoadSlices(pGroups, "LandscapeShader.glsl");
// Initialise!
if (!shader.Init(name, UniformNames)) {
shader.ClearSlices();
return false;
}
return true;
}
bool C4LandscapeRenderGL::LoadShaders(C4GroupSet *pGroups)
{
// No support?
if(!GLEW_ARB_fragment_program)
{
Log(" gl: no shader support!");
return false;
}
// First, clear out all existing shaders
ClearShaders();
// Make uniform name map
ZeroMem(UniformNames, sizeof(UniformNames));
UniformNames[C4LRU_LandscapeTex] = "landscapeTex";
UniformNames[C4LRU_ScalerTex] = "scalerTex";
UniformNames[C4LRU_MaterialTex] = "materialTex";
UniformNames[C4LRU_LightTex] = "lightTex";
UniformNames[C4LRU_AmbientTex] = "ambientTex";
UniformNames[C4LRU_Gamma] = "gamma";
UniformNames[C4LRU_Resolution] = "resolution";
UniformNames[C4LRU_Center] = "center";
UniformNames[C4LRU_MatMapTex] = "matMapTex";
UniformNames[C4LRU_MaterialDepth] = "materialDepth";
UniformNames[C4LRU_MaterialSize] = "materialSize";
UniformNames[C4LRU_AmbientBrightness] = "ambientBrightness";
UniformNames[C4LRU_AmbientTransform] = "ambientTransform";
if(!LoadShader(pGroups, Shader, "landscape", 0))
return false;
if(!LoadShader(pGroups, ShaderLight, "landscapeLight", C4SSC_LIGHT))
return false;
return true;
}
void C4LandscapeRenderGL::ClearShaders()
{
if (Shader.Initialised())
{
Shader.Clear();
Shader.ClearSlices();
}
if (ShaderLight.Initialised())
{
ShaderLight.Clear();
ShaderLight.ClearSlices();
}
}
void C4LandscapeRenderGL::RefreshShaders()
{
Shader.Refresh("landscape", UniformNames);
ShaderLight.Refresh("landscapeLight", UniformNames);
}
bool C4LandscapeRenderGL::LoadScaler(C4GroupSet *pGroups)
{
// Search for scaler
C4Group *pGroup = pGroups->FindEntry(C4CFN_LandscapeScaler);
if(!pGroup) return false;
// Load scaler from group
if(!fctScaler.Load(*pGroup, C4CFN_LandscapeScaler))
return false;
// Check size
const int iOrigWdt = 8 * 3, iOrigHgt = 4 * 8 * 3;
const int iFactor = fctScaler.Wdt / iOrigWdt;
if(fctScaler.Wdt != iFactor * iOrigWdt || fctScaler.Hgt != iFactor * iOrigHgt)
{
LogF(" gl: Unexpected scaler size - should be multiple of %dx%d!", iOrigWdt, iOrigHgt);
return false;
}
// Walk through all lookups we have in the texture and decide where
// to look for the "other" pixel. This might not be unique later on,
// so it is a good idea to have a proper priority order here.
fctScaler.Surface->Lock();
int i;
for (i = 0; i < 8 * 4 * 8; i++) {
// Decode from ID what pixels are expected to be set in this case
enum Px { NW, N, NE, W, E, SW, S, SE, X };
int p_x[9] = { -1, 0, 1, -1, 1, -1, 0, 1, 0 };
int p_y[9] = { -1, -1, -1, 0, 0, 1, 1, 1, 0 };
bool pxAt[X];
for(int j = 0; j < X; j++)
pxAt[j] = !!(i & (1 << j));
// Oc = octant borders. Set up arrays to get righthand border
// of an octant, in a way that we can easily rotate further.
enum Oc { NWW, NEE, SWW, SEE, NNW, NNE, SSW, SSE };
int p2a[8] = { 5, 6, 7, 4, 0, 3, 2, 1 };
Oc a2o[8] = { SEE, SSE, SSW, SWW, NWW, NNW, NNE, NEE };
// Decide in which octant we want to interpolate towards
// which pixel. Pick the nearest unset pixel using a special
// priority order.
Px opx[8] = { X,X,X,X,X,X,X,X };
#define INTERPOLATE(x,da) do { \
int y = a2o[(8+p2a[x]+(da)) % 8];\
if (!pxAt[x] && opx[y] == X) opx[y] = x; \
} while(false)
for(int j = 0; j < 4; j++) {
// vertical
INTERPOLATE(N, j); INTERPOLATE(N, -j-1);
INTERPOLATE(S, j); INTERPOLATE(S, -j-1);
// horizontal
INTERPOLATE(W, j); INTERPOLATE(W, -j-1);
INTERPOLATE(E, j); INTERPOLATE(E, -j-1);
// diagonals
INTERPOLATE(NW, j); INTERPOLATE(NW, -j-1);
INTERPOLATE(SW, j); INTERPOLATE(SW, -j-1);
INTERPOLATE(NE, j); INTERPOLATE(NE, -j-1);
INTERPOLATE(SE, j); INTERPOLATE(SE, -j-1);
}
// Decide in which octants we will not interpolate normals.
// It doesn't make sense when there's another material in that
// general direction, as then the bias of that will factor into
// the interpolation, giving bright borders on dark shading,
// and vice-versa.
bool noNormals[8];
noNormals[NNW] = noNormals[NWW] = !pxAt[W] || !pxAt[NW] || !pxAt[N];
noNormals[NNE] = noNormals[NEE] = !pxAt[E] || !pxAt[NE] || !pxAt[N];
noNormals[SSW] = noNormals[SWW] = !pxAt[W] || !pxAt[SW] || !pxAt[S];
noNormals[SSE] = noNormals[SEE] = !pxAt[E] || !pxAt[SE] || !pxAt[S];
// Set blue and green components to relative coordinates of
// "other" pixel, and alpha to mix param for normals
const int x0 = (i % 8) * 3 * iFactor;
const int y0 = (i / 8) * 3 * iFactor;
const int iPxs = 3 * iFactor;
int y, x;
for(y = 0; y < iPxs; y++)
{
for(x = 0; x < iPxs; x++)
{
// Find out in which octagon we are
int oct = 0;
if(2 * x >= iPxs) oct+=1;
if(2 * y >= iPxs) oct+=2;
if((x >= y) != (x >= iPxs - y)) oct+=4;
// Get pixel, do processing
DWORD pix = fctScaler.Surface->GetPixDw(x0+x, y0+y, false);
BYTE val = GetGreenValue(pix);
if(val >= 250) val = 255;
BYTE bx = 64 * (p_x[opx[oct]] + 1);
BYTE by = 64 * (p_y[opx[oct]] + 1);
BYTE bn = (noNormals[oct] ? 255 : 1);
fctScaler.Surface->SetPixDw(x0+x, y0+y, RGBA(val, bx, by, bn));
}
}
}
return fctScaler.Surface->Unlock();
}
int32_t C4LandscapeRenderGL::LookupTextureTransition(const char *szFrom, const char *szTo)
{
// Is this actually a transition? Otherwise we're looking for a single texture
bool fTransit = !SEqual(szFrom, szTo);
// Look for a position in the map where the textures appear in sequence
uint32_t i;
for(i = 1; i < MaterialTextureMap.size(); i++)
{
if(SEqual(szFrom, MaterialTextureMap[i].getData()))
{
// Single texture: We're done
if(!fTransit) return i;
// Check next texture as well
if(i + 1 >= MaterialTextureMap.size())
return -1;
if(SEqual(szTo, MaterialTextureMap[i+1].getData()))
return i;
}
}
return -1;
}
void C4LandscapeRenderGL::AddTextureTransition(const char *szFrom, const char *szTo)
{
// Empty?
if (!szFrom || !szTo) return;
// First try the lookup (both directions)
if (LookupTextureTransition(szFrom, szTo) >= 0) return;
if (LookupTextureTransition(szTo, szFrom) >= 0) return;
// Single texture? Add it as single
if (SEqual(szTo, szFrom))
MaterialTextureMap.push_back(StdCopyStrBuf(szFrom));
// Have one of the textures at the end of the list?
else if(SEqual(MaterialTextureMap.back().getData(), szFrom))
MaterialTextureMap.push_back(StdCopyStrBuf(szTo));
else if(SEqual(MaterialTextureMap.back().getData(), szTo))
MaterialTextureMap.push_back(StdCopyStrBuf(szFrom));
else
{
// Otherwise add both
MaterialTextureMap.push_back(StdCopyStrBuf(szFrom));
MaterialTextureMap.push_back(StdCopyStrBuf(szTo));
}
}
void C4LandscapeRenderGL::AddTextureAnim(const char *szTextureAnim)
{
if(!szTextureAnim) return;
#ifdef DEBUG_SEPERATOR_TEXTURES
// Save back count of textures at start
uint32_t iStartTexCount = MaterialTextureMap.size();
#endif
// Add all individual transitions
const char *pFrom = szTextureAnim;
for(;;)
{
// Get next phase
const char *pTo = strchr(pFrom, '-');
if(!pTo) pTo = szTextureAnim; else pTo++;
// Add transition
StdStrBuf From, To;
From.CopyUntil(pFrom, '-');
To.CopyUntil(pTo, '-');
AddTextureTransition(From.getData(), To.getData());
// Advance
if(pTo == szTextureAnim) break;
pFrom = pTo;
}
#ifdef DEBUG_SEPERATOR_TEXTURES
// Add a seperator texture, if we added any new ones
if(MaterialTextureMap.size() > iStartTexCount)
MaterialTextureMap.push_back(StdCopyStrBuf(SEPERATOR_TEXTURE));
#endif
}
void C4LandscapeRenderGL::AddTexturesFromMap(C4TextureMap *pMap)
{
// Go through used texture (animations) and add all phases to our map
// Note: We can be smarter here, for example add longer animations
// first in order to make better reuse of 3D texture slots.
// We could even make a full-blown optimization problem out of it.
// Future work...
const C4TexMapEntry *pEntry;
for(int32_t i = 0; (pEntry = pMap->GetEntry(i)); i++)
// ToDo: Properly handle jumping back
AddTextureAnim(pEntry->GetTextureName());
}
void C4LandscapeRenderGL::BuildMatMap(uint32_t *pTex)
{
// TODO: Still merely an inefficient placeholder for things to come...
// Build material-texture map (depth parameter where to find appropriate texture)
for(int pix = 0; pix < 256; pix++)
{
// Look up indexed entry
const C4TexMapEntry *pEntry = pTexs->GetEntry(PixCol2Tex(BYTE(pix)));
if(!pEntry->GetTextureName())
{
// Undefined textures transparent
pTex[2*pix] = 0;
pTex[2*pix+1] = RGBA(0,0,0,255);
continue;
}
// Got animation?
int iPhases = 1; const char *p = pEntry->GetTextureName();
while((p = strchr(p, '-'))) { p++; iPhases++; }
// Hard-coded hack. Fix me!
C4Material *pMaterial = pEntry->GetMaterial();
const int iPhaseLength = pMaterial->AnimationSpeed;
float phase = 0;
if (iPhases > 1) {
phase = C4TimeMilliseconds::Now().AsInt() % (iPhases * iPhaseLength);
phase /= iPhaseLength;
}
// Find our transition
const char *pFrom = pEntry->GetTextureName();
float gTexCoo = 0;
for(int iP = 0;; iP++)
{
// Get next phase
const char *pTo = strchr(pFrom, '-');
if(!pTo) pTo = pEntry->GetTextureName(); else pTo++;
// Add transition
if(iP == int(phase))
{
StdStrBuf From, To;
From.CopyUntil(pFrom, '-');
To.CopyUntil(pTo, '-');
// Find transition
int iTrans;
if ((iTrans = LookupTextureTransition(From.getData(), To.getData())) >= 0)
gTexCoo = float(iTrans) + fmod(phase, 1.0f);
else if ((iTrans = LookupTextureTransition(To.getData(), From.getData())) >= 0)
gTexCoo = float(iTrans) + 1.0 - fmod(phase, 1.0f);
break;
}
// Advance
pFrom = pTo;
}
// Assign texture
int iTexCoo = int((gTexCoo * 256.0 / iMaterialTextureDepth) + 0.5);
pTex[2*pix] = RGBA(
Clamp(pMaterial->LightEmit[0], 0, 255),
Clamp(pMaterial->LightEmit[1], 0, 255),
Clamp(pMaterial->LightEmit[2], 0, 255),
iTexCoo);
pTex[2*pix+1] = RGBA(
Clamp(pMaterial->LightSpot[0], 0, 255),
Clamp(pMaterial->LightSpot[1], 0, 255),
Clamp(pMaterial->LightSpot[2], 0, 255),
Clamp(pMaterial->LightAngle, 0, 255));
}
}
void C4LandscapeRenderGL::Draw(const C4TargetFacet &cgo, const C4FoWRegion *Light)
{
// Must have GL and be initialized
if(!pGL && !Shader.Initialised() && !ShaderLight.Initialised()) return;
// prepare rendering to surface
C4Surface *sfcTarget = cgo.Surface;
if (!pGL->PrepareRendering(sfcTarget)) return;
#ifdef AUTO_RELOAD_SHADERS
RefreshShaders();
#endif // AUTO_RELOAD_SHADERS
// Clear error(s?)
while(glGetError()) {}
// Choose the right shader depending on whether we have dynamic lighting or not
const C4Shader* shader = &Shader;
if (Light) shader = &ShaderLight;
if (!shader->Initialised()) return;
// Activate shader
C4ShaderCall ShaderCall(shader);
ShaderCall.Start();
// Bind data
ShaderCall.SetUniform3fv(C4LRU_Gamma, 1, pGL->gammaOut);
ShaderCall.SetUniform2f(C4LRU_Resolution, Surfaces[0]->Wdt, Surfaces[0]->Hgt);
float centerX = float(cgo.TargetX)+float(cgo.Wdt)/2,
centerY = float(cgo.TargetY)+float(cgo.Hgt)/2;
ShaderCall.SetUniform2f(C4LRU_Center,
centerX / float(Surfaces[0]->Wdt),
centerY / float(Surfaces[0]->Hgt));
ShaderCall.SetUniform1i(C4LRU_MaterialDepth, iMaterialTextureDepth);
ShaderCall.SetUniform2f(C4LRU_MaterialSize,
float(iMaterialWidth) / ::Game.C4S.Landscape.MaterialZoom,
float(iMaterialHeight) / ::Game.C4S.Landscape.MaterialZoom);
if (Light)
{
const FLOAT_RECT ViewportRect = Light->getViewportRegion();
const C4Rect ClipRect = pDraw->GetClipRect();
const C4Rect OutRect = pDraw->GetOutRect();
float ambientTransform[6];
Light->getFoW()->Ambient.GetFragTransform(ViewportRect, ClipRect, OutRect, ambientTransform);
ShaderCall.SetUniformMatrix2x3fv(C4LRU_AmbientTransform, 1, ambientTransform);
ShaderCall.SetUniform1f(C4LRU_AmbientBrightness, Light->getFoW()->Ambient.GetBrightness());
}
// Start binding textures
if(shader->HaveUniform(C4LRU_LandscapeTex))
{
GLint iLandscapeUnits[C4LR_SurfaceCount];
for(int i = 0; i < C4LR_SurfaceCount; i++)
{
iLandscapeUnits[i] = ShaderCall.AllocTexUnit(-1, GL_TEXTURE_2D) - GL_TEXTURE0;
glBindTexture(GL_TEXTURE_2D, Surfaces[i]->textures[0].texName);
if (pGL->Zoom != 1.0)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
else
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
}
}
ShaderCall.SetUniform1iv(C4LRU_LandscapeTex, C4LR_SurfaceCount, iLandscapeUnits);
}
if(Light && ShaderCall.AllocTexUnit(C4LRU_LightTex, GL_TEXTURE_2D))
{
glBindTexture(GL_TEXTURE_2D, Light->getSurface()->textures[0].texName);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
if(Light && ShaderCall.AllocTexUnit(C4LRU_AmbientTex, GL_TEXTURE_2D))
{
glBindTexture(GL_TEXTURE_2D, Light->getFoW()->Ambient.Tex);
}
if(ShaderCall.AllocTexUnit(C4LRU_ScalerTex, GL_TEXTURE_2D))
{
glBindTexture(GL_TEXTURE_2D, fctScaler.Surface->textures[0].texName);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
if(ShaderCall.AllocTexUnit(C4LRU_MaterialTex, GL_TEXTURE_3D))
{
// Decide which mip-map level to use
double z = 0.5; int iMM = 0;
while(pGL->Zoom < z * ::Game.C4S.Landscape.MaterialZoom && iMM + 1 <C4LR_MipMapCount)
{ z /= 2; iMM++; }
glBindTexture(GL_TEXTURE_3D, hMaterialTexture[iMM]);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
if(ShaderCall.AllocTexUnit(C4LRU_MatMapTex, GL_TEXTURE_1D))
{
uint32_t MatMap[2*256];
BuildMatMap(MatMap);
glTexImage1D(GL_TEXTURE_1D, 0, GL_RGBA8, 2*256, 0, GL_RGBA, GL_UNSIGNED_BYTE, MatMap);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
}
// Calculate coordinates into landscape texture
FLOAT_RECT fTexBlt;
float fx = float(cgo.TargetX), fy = float(cgo.TargetY);
fTexBlt.left = fx / Surfaces[0]->Wdt;
fTexBlt.top = fy / Surfaces[0]->Hgt;
fTexBlt.right = (fx + float(cgo.Wdt)) / Surfaces[0]->Wdt;
fTexBlt.bottom= (fy + float(cgo.Hgt)) / Surfaces[0]->Hgt;
// Calculate coordinates on screen (zoomed!)
FLOAT_RECT tTexBlt;
float tx = float(cgo.X), ty = float(cgo.Y);
pGL->ApplyZoom(tx, ty);
tTexBlt.left = tx;
tTexBlt.top = ty;
tTexBlt.right = tx + float(cgo.Wdt) * pGL->Zoom;
tTexBlt.bottom= ty + float(cgo.Hgt) * pGL->Zoom;
// Blend it
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// To the blit
glColor3f(1.0, 1.0, 1.0);
glBegin(GL_QUADS);
if (Light)
{
// Calculate coordinates into light texture
FLOAT_RECT lTexBlt;
if (Light)
{
const C4Rect LightRect = Light->getRegion();
int32_t iLightWdt = Light->getSurface()->Wdt,
iLightHgt = Light->getSurface()->Hgt;
lTexBlt.left = (fx - LightRect.x) / iLightWdt;
lTexBlt.top = 1.0 - (fy - LightRect.y) / iLightHgt;
lTexBlt.right = (fx + cgo.Wdt - LightRect.x) / iLightWdt;
lTexBlt.bottom = 1.0 - (fy + cgo.Hgt - LightRect.y) / iLightHgt;
}
#define LVERTEX(x, y) \
glMultiTexCoord2f(hLandscapeTexCoord, fTexBlt.x, fTexBlt.y); \
glMultiTexCoord2f(hLightTexCoord, lTexBlt.x, lTexBlt.y); \
glVertex2f(tTexBlt.x, tTexBlt.y);
LVERTEX(left, top);
LVERTEX(right, top);
LVERTEX(right, bottom);
LVERTEX(left, bottom);
#undef LVERTEX
}
else
{
#define VERTEX(x, y) \
glMultiTexCoord2f(hLandscapeTexCoord, fTexBlt.x, fTexBlt.y); \
glVertex2f(tTexBlt.x, tTexBlt.y);
VERTEX(left, top);
VERTEX(right, top);
VERTEX(right, bottom);
VERTEX(left, bottom);
#undef VERTEX
}
glEnd();
// Remove shader
ShaderCall.Finish();
}
#endif // #ifndef USE_CONSOLE
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