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rend_list.c
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rend_list.c
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/**\file rend_list.c
*\section License
* License: GPL
* Online License Link: http://www.gnu.org/licenses/gpl.html
*
*\author Copyright © 2003-2012 Jaakko Keränen <jaakko.keranen@iki.fi>
*\author Copyright © 2006-2012 Daniel Swanson <danij@dengine.net>
*\author Copyright © 2006 Jamie Jones <jamie_jones_au@yahoo.com.au>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
/**
* Doomsday Rendering Lists v3.3
*
* 3.3 -- Texture unit write state and revised primitive write interface.
* 3.2 -- Shiny walls and floors
* 3.1 -- Support for multiple shadow textures
* 3.0 -- Multitexturing
*/
// HEADER FILES ------------------------------------------------------------
#include <stdlib.h>
#include "de_base.h"
#include "de_console.h"
#include "de_render.h"
#include "de_play.h"
#include "de_refresh.h"
#include "de_graphics.h"
#include "de_misc.h"
#include "def_main.h"
#include "m_profiler.h"
// MACROS ------------------------------------------------------------------
BEGIN_PROF_TIMERS()
PROF_RL_ADD_POLY,
PROF_RL_GET_LIST,
PROF_RL_RENDER_ALL,
PROF_RL_RENDER_NORMAL,
PROF_RL_RENDER_LIGHT,
PROF_RL_RENDER_MASKED,
PROF_RL_RENDER_SHINY,
PROF_RL_RENDER_SHADOW,
PROF_RL_RENDER_SKYMASK
END_PROF_TIMERS()
#define RL_HASH_SIZE 128
// Number of extra bytes to keep allocated in the end of each rendering list.
#define LIST_DATA_PADDING 16
// \fixme Rlist allocation could be dynamic.
#define MAX_RLISTS 1024
#define MTEX_DETAILS_ENABLED (r_detail && useMultiTexDetails && \
defs.count.details.num > 0)
#define IS_MTEX_DETAILS (MTEX_DETAILS_ENABLED && numTexUnits > 1)
#define IS_MTEX_LIGHTS (!IS_MTEX_DETAILS && !usingFog && useMultiTexLights \
&& numTexUnits > 1 && envModAdd)
// Drawing condition flags.
#define DCF_NO_BLEND 0x00000001
#define DCF_BLEND 0x00000002
#define DCF_SET_LIGHT_ENV0 0x00000004
#define DCF_SET_LIGHT_ENV1 0x00000008
#define DCF_SET_LIGHT_ENV (DCF_SET_LIGHT_ENV0 | DCF_SET_LIGHT_ENV1)
#define DCF_JUST_ONE_LIGHT 0x00000010
#define DCF_MANY_LIGHTS 0x00000020
#define DCF_SET_BLEND_MODE 0x00000040 // Primitive-specific blending.
#define DCF_SET_MATRIX_DTEXTURE0 0x00000080
#define DCF_SET_MATRIX_DTEXTURE1 0x00000100
#define DCF_SET_MATRIX_DTEXTURE (DCF_SET_MATRIX_DTEXTURE0 | DCF_SET_MATRIX_DTEXTURE1)
#define DCF_SET_MATRIX_TEXTURE0 0x00000200
#define DCF_SET_MATRIX_TEXTURE1 0x00000400
#define DCF_SET_MATRIX_TEXTURE (DCF_SET_MATRIX_TEXTURE0 | DCF_SET_MATRIX_TEXTURE1)
#define DCF_NO_COLOR 0x00000800
#define DCF_SKIP 0x80000000
// TYPES -------------------------------------------------------------------
// List Modes.
typedef enum listmode_e {
LM_SKYMASK,
LM_ALL,
LM_LIGHT_MOD_TEXTURE,
LM_FIRST_LIGHT,
LM_TEXTURE_PLUS_LIGHT,
LM_UNBLENDED_TEXTURE_AND_DETAIL,
LM_BLENDED,
LM_BLENDED_FIRST_LIGHT,
LM_NO_LIGHTS,
LM_WITHOUT_TEXTURE,
LM_LIGHTS,
LM_MOD_TEXTURE,
LM_MOD_TEXTURE_MANY_LIGHTS,
LM_UNBLENDED_MOD_TEXTURE_AND_DETAIL,
LM_BLENDED_MOD_TEXTURE,
LM_ALL_DETAILS,
LM_BLENDED_DETAILS,
LM_SHADOW,
LM_SHINY,
LM_MASKED_SHINY,
LM_ALL_SHINY
} listmode_t;
// Texture coordinate array indices.
enum {
TCA_MAIN, // Main texture.
TCA_BLEND, // Blendtarget texture.
TCA_LIGHT, // Dynlight texture.
NUM_TEXCOORD_ARRAYS
};
// Texture unit indices. These map to real GL texture units.
typedef enum {
TU_PRIMARY = 0,
TU_PRIMARY_DETAIL,
TU_INTER,
TU_INTER_DETAIL,
NUM_TEXTURE_UNITS
} texunitid_t;
// Primitive types.
typedef enum {
PT_NORMAL = 0,
PT_SKY_MASK, // A sky mask polygon.
PT_LIGHT, // A dynamic light.
PT_SHADOW, // An object shadow or fakeradio edge shadow.
PT_SHINY
} rendpolytype_t;
/**
* Primitive flags:
*/
#define PF_ONE_LIGHT 0x01
#define PF_MANY_LIGHTS 0x02
#define PF_IS_LIT (PF_ONE_LIGHT | PF_MANY_LIGHTS)
/**
* Each primhdr begins a block of polygon data that ends up as one or
* more triangles on the screen. Note that there are pointers to the
* rendering list itself here; they will need to be properly restored
* whenever the list is resized.
*/
typedef struct primhdr_s {
// RL_AddPoly expects that size is the first thing in the header.
// Must be an offset since the list is sometimes reallocated.
uint size; // Size of this primitive (zero = n/a).
ushort type; // OpenGL primitive type e.g., GL_TRIANGLE_STRIP.
blendmode_t blendMode; // BM_* Primitive-specific blending mode.
// Elements in the vertex array for this primitive.
// The indices are always contiguous: indices[0] is the base, and
// indices[1...n] > indices[0].
// All indices in the range indices[0]...indices[n] are used by this
// primitive (some are shared).
ushort numIndices;
uint* indices;
byte flags; // PF_* primitive flags.
float ptexOffset[2], ptexScale[2];
// Detail texture matrix manipulations.
float texOffset[2], texScale[2];
// Some primitives are modulated with an additional texture and color
// using multitexturing (if available), depending on the list state.
// Example: first light affecting the primitive.
DGLuint modTex;
float modColor[4];
} primhdr_t;
// Helper macro for accessing rendlist texmap units.
#define TU(x, n) (&((x)->texmapunits[(n)]))
// \note: Slighty different representation than that passed to RL_AddPoly.
typedef struct rendlist_texmapunit_s {
DGLuint tex;
int magMode;
float opacity; // Blend amount.
blendmode_t blendMode; // Currently used only with shiny pass.
} rendlist_texmapunit_t;
/**
* The rendering list. When the list is resized, pointers in the primitives
* need to be restored so that they point to the new list.
*/
typedef struct rendlist_s {
struct rendlist_s* next;
rendlist_texmapunit_t texmapunits[NUM_TEXTURE_UNITS];
size_t size; // Number of bytes allocated for the data.
byte* data; // Data for a number of polygons (The List).
byte* cursor; // A pointer to data, for reading/writing.
primhdr_t* last; // Pointer to the last primitive (or NULL).
} rendlist_t;
typedef struct listhash_s {
rendlist_t* first, *last;
} listhash_t;
// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
// EXTERNAL DATA DECLARATIONS ----------------------------------------------
extern byte devRendSkyAlways;
extern boolean usingFog;
extern byte freezeRLs;
// PUBLIC DATA DEFINITIONS -------------------------------------------------
int renderTextures = true;
int renderWireframe = false;
int useMultiTexLights = true;
int useMultiTexDetails = true;
// Rendering paramaters for dynamic lights.
int dynlightBlend = 0;
// Rendering parameters for detail textures.
float detailFactor = .5f;
float detailScale = 4;
float torchColor[3] = {1, 1, 1};
int torchAdditive = true;
// PRIVATE DATA DEFINITIONS ------------------------------------------------
static boolean initedOk = false;
// Logical texture unit state. Used with RL_LoadDefaultRtus and RL_CopyRtu
static rtexmapunit_t rtuDefault;
static rtexmapunit_t rtuState[NUM_TEXMAP_UNITS];
static rtexmapunit_t const* rtuMap[NUM_TEXMAP_UNITS];
// GL texture unit state used during write. Global for performance reasons.
static rtexmapunit_t const* texunits[NUM_TEXTURE_UNITS];
/**
* The vertex arrays.
*/
static dgl_vertex_t* vertices;
static dgl_texcoord_t* texCoords[NUM_TEXCOORD_ARRAYS];
static dgl_color_t* colors;
static uint numVertices, maxVertices;
static boolean rDrawSky;
/**
* The rendering lists.
*/
// Surfaces without lights.
static listhash_t plainHash[RL_HASH_SIZE];
// Surfaces with lights.
static listhash_t litHash[RL_HASH_SIZE];
// Additional light primitives.
static listhash_t dynHash[RL_HASH_SIZE];
// Shiny surfaces.
static listhash_t shinyHash[RL_HASH_SIZE];
static listhash_t shadowHash[RL_HASH_SIZE];
static rendlist_t skyMaskList;
static float blackColor[4] = { 0, 0, 0, 0 };
// CODE --------------------------------------------------------------------
void RL_Register(void)
{
// \todo Move cvars here.
C_VAR_INT("rend-light-multitex", &useMultiTexLights, 0, 0, 1);
C_VAR_INT("rend-light-blend", &dynlightBlend, 0, 0, 2);
}
static void rlBind(DGLuint glName, int magMode)
{
#ifdef _DEBUG
GLenum error;
#endif
if(!renderTextures) glName = 0;
glBindTexture(GL_TEXTURE_2D, glName);
if(glName != 0)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magMode);
if(GL_state.features.texFilterAniso)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, GL_GetTexAnisoMul(texAniso));
}
#if _DEBUG
error = glGetError();
if(error != GL_NO_ERROR)
Con_Error("OpenGL error: %i\n", error);
#endif
}
static void rlBind2(const rendlist_texmapunit_t* tmu)
{
if(!tmu->tex) return;
rlBind(tmu->tex, tmu->magMode);
}
static void rlBindTo(int unit, const rendlist_texmapunit_t* tmu)
{
if(!tmu->tex)
return;
glActiveTexture(GL_TEXTURE0 + (byte)unit);
rlBind(tmu->tex, tmu->magMode);
}
static void clearHash(listhash_t* hash)
{
memset(hash, 0, sizeof(listhash_t) * RL_HASH_SIZE);
}
void RL_Init(void)
{
if(initedOk) return; // Already been here.
clearHash(plainHash);
clearHash(litHash);
clearHash(dynHash);
clearHash(shadowHash);
clearHash(shinyHash);
memset(&skyMaskList, 0, sizeof(skyMaskList));
Rtu_Init(&rtuDefault);
RL_LoadDefaultRtus();
initedOk = true;
}
void RL_Shutdown(void)
{
// Stub.
/// \todo Rework list memory management so we explicitly free it, rather
/// than depend on it being free'd by the Zone when it is shutdown.
initedOk = false;
}
boolean RL_IsMTexLights(void)
{
return IS_MTEX_LIGHTS;
}
boolean RL_IsMTexDetails(void)
{
return IS_MTEX_DETAILS;
}
static void clearVertices(void)
{
numVertices = 0;
}
static void destroyVertices(void)
{
uint i;
numVertices = maxVertices = 0;
if(vertices)
M_Free(vertices);
vertices = NULL;
if(colors)
M_Free(colors);
colors = NULL;
for(i = 0; i < NUM_TEXCOORD_ARRAYS; ++i)
{
if(texCoords[i])
M_Free(texCoords[i]);
texCoords[i] = NULL;
}
}
/**
* Allocate vertices from the global vertex array.
*/
static uint allocateVertices(uint count)
{
uint i, base = numVertices;
// Do we need to allocate more memory?
numVertices += count;
while(numVertices > maxVertices)
{
if(maxVertices == 0)
{
maxVertices = 16;
}
else
{
maxVertices *= 2;
}
vertices = M_Realloc(vertices, sizeof(dgl_vertex_t) * maxVertices);
colors = M_Realloc(colors, sizeof(dgl_color_t) * maxVertices);
for(i = 0; i < NUM_TEXCOORD_ARRAYS; ++i)
{
texCoords[i] =
M_Realloc(texCoords[i], sizeof(dgl_texcoord_t) * maxVertices);
}
}
return base;
}
static void destroyList(rendlist_t* rl)
{
// All the list data will be destroyed.
if(rl->data)
Z_Free(rl->data);
rl->data = NULL;
#if _DEBUG
Z_CheckHeap();
#endif
rl->cursor = NULL;
TU(rl, TU_INTER_DETAIL)->tex = 0;
rl->last = NULL;
rl->size = 0;
}
static void deleteHash(listhash_t* hash)
{
uint i;
rendlist_t* list, *next;
for(i = 0; i < RL_HASH_SIZE; ++i)
{
for(list = hash[i].first; list; list = next)
{
next = list->next;
destroyList(list);
Z_Free(list);
}
}
clearHash(hash);
}
/**
* All lists will be destroyed.
*/
void RL_DeleteLists(void)
{
// Delete all lists.
deleteHash(plainHash);
deleteHash(litHash);
deleteHash(dynHash);
deleteHash(shadowHash);
deleteHash(shinyHash);
destroyList(&skyMaskList);
destroyVertices();
#ifdef _DEBUG
Z_CheckHeap();
#endif
PRINT_PROF( PROF_RL_ADD_POLY );
PRINT_PROF( PROF_RL_GET_LIST );
PRINT_PROF( PROF_RL_RENDER_ALL );
PRINT_PROF( PROF_RL_RENDER_NORMAL );
PRINT_PROF( PROF_RL_RENDER_LIGHT );
PRINT_PROF( PROF_RL_RENDER_MASKED );
PRINT_PROF( PROF_RL_RENDER_SHADOW );
PRINT_PROF( PROF_RL_RENDER_SHINY );
PRINT_PROF( PROF_RL_RENDER_SKYMASK );
}
/**
* Set the R/W cursor to the beginning.
*/
static void rewindList(rendlist_t* rl)
{
rl->cursor = rl->data;
rl->last = NULL;
// The interpolation target must be explicitly set (in RL_AddPoly).
TU(rl, TU_INTER)->tex = 0;
TU(rl, TU_INTER)->opacity = 0;
TU(rl, TU_INTER_DETAIL)->tex = 0;
TU(rl, TU_INTER_DETAIL)->opacity = 0;
}
static void rewindHash(listhash_t* hash)
{
uint i;
rendlist_t* list;
for(i = 0; i < RL_HASH_SIZE; ++i)
{
for(list = hash[i].first; list; list = list->next)
rewindList(list);
}
}
/**
* Called before rendering a frame.
*/
void RL_ClearLists(void)
{
rewindHash(plainHash);
rewindHash(litHash);
rewindHash(dynHash);
rewindHash(shadowHash);
rewindHash(shinyHash);
rewindList(&skyMaskList);
// Clear the vertex array.
clearVertices();
// \fixme Does this belong here?
rDrawSky = false;
}
static rendlist_t* createList(listhash_t* hash)
{
rendlist_t* list = Z_Calloc(sizeof(rendlist_t), PU_APPSTATIC, 0);
if(hash->last)
hash->last->next = list;
hash->last = list;
if(!hash->first)
hash->first = list;
return list;
}
static __inline void copyTU(rendlist_texmapunit_t* ltu, const rtexmapunit_t* rtu)
{
ltu->tex = rtu->tex;
ltu->magMode = rtu->magMode;
ltu->blendMode = rtu->blendMode;
ltu->opacity = MINMAX_OF(0, rtu->opacity, 1);
}
static __inline boolean compareTU(const rendlist_texmapunit_t* ltu, const rtexmapunit_t* rtu)
{
if(ltu->tex == rtu->tex && ltu->magMode == rtu->magMode && ltu->opacity == rtu->opacity)
return true;
return false;
}
static rendlist_t* getListFor(rendpolytype_t polyType, boolean isLit)
{
listhash_t* hash, *table;
rendlist_t* dest, *convertable = NULL;
// Check for specialized rendering lists first.
if(polyType == PT_SKY_MASK)
{
return &skyMaskList;
}
// Choose the correct hash table.
switch(polyType)
{
case PT_SHINY: table = shinyHash; break;
case PT_SHADOW: table = shadowHash; break;
case PT_LIGHT: table = dynHash; break;
default:
table = (isLit ? litHash : plainHash);
break;
}
// Find/create a list in the hash.
hash = &table[texunits[TU_PRIMARY]->tex % RL_HASH_SIZE];
for(dest = hash->first; dest; dest = dest->next)
{
if((polyType == PT_SHINY &&
compareTU(TU(dest, TU_PRIMARY), texunits[TU_PRIMARY])) ||
(polyType != PT_SHINY &&
compareTU(TU(dest, TU_PRIMARY), texunits[TU_PRIMARY]) &&
compareTU(TU(dest, TU_PRIMARY_DETAIL), texunits[TU_PRIMARY_DETAIL])))
{
if(!TU(dest, TU_INTER)->tex && !texunits[TU_INTER]->tex)
{
// This will do great.
return dest;
}
// Is this eligible for conversion to a blended list?
if(!dest->last && !convertable && texunits[TU_INTER]->tex)
{
// If necessary, this empty list will be selected.
convertable = dest;
}
// Possibly an exact match?
if((polyType == PT_SHINY &&
compareTU(TU(dest, TU_INTER), texunits[TU_INTER])) ||
(polyType != PT_SHINY &&
compareTU(TU(dest, TU_INTER), texunits[TU_INTER]) &&
compareTU(TU(dest, TU_INTER_DETAIL), texunits[TU_INTER_DETAIL])))
{
return dest;
}
}
}
// Did we find a convertable list?
if(convertable)
{ // This list is currently empty.
if(polyType == PT_SHINY)
{
copyTU(TU(convertable, TU_INTER), texunits[TU_INTER]);
}
else
{
copyTU(TU(convertable, TU_INTER), texunits[TU_INTER]);
copyTU(TU(convertable, TU_INTER_DETAIL), texunits[TU_INTER_DETAIL]);
}
return convertable;
}
// Create a new list.
dest = createList(hash);
// Init the info.
if(polyType == PT_SHINY)
{
copyTU(TU(dest, TU_PRIMARY), texunits[TU_PRIMARY]);
if(texunits[TU_INTER]->tex)
copyTU(TU(dest, TU_INTER), texunits[TU_INTER]);
}
else
{
copyTU(TU(dest, TU_PRIMARY), texunits[TU_PRIMARY]);
copyTU(TU(dest, TU_PRIMARY_DETAIL), texunits[TU_PRIMARY_DETAIL]);
if(texunits[TU_INTER]->tex)
{
copyTU(TU(dest, TU_INTER), texunits[TU_INTER]);
copyTU(TU(dest, TU_INTER_DETAIL), texunits[TU_INTER_DETAIL]);
}
}
return dest;
}
/**
* @return Pointer to the start of the allocated data.
*/
static void* allocateData(rendlist_t* list, int bytes)
{
size_t required;
int startOffset = list->cursor - list->data;
primhdr_t* hdr;
if(bytes <= 0)
return NULL;
// We require the extra bytes because we want that the end of the
// list data is always safe for writing-in-advance. This is needed
// when the 'end of data' marker is written in RL_AddPoly.
required = startOffset + bytes + LIST_DATA_PADDING;
// First check that the data buffer of the list is large enough.
if(required > list->size)
{
// Offsets must be preserved.
byte* oldData = list->data;
int cursorOffset = -1;
int lastOffset = -1;
if(list->cursor)
cursorOffset = list->cursor - oldData;
if(list->last)
lastOffset = (byte *) list->last - oldData;
// Allocate more memory for the data buffer.
if(list->size == 0)
list->size = 1024;
while(list->size < required)
list->size *= 2;
list->data = Z_Realloc(list->data, list->size, PU_APPSTATIC);
// Restore main pointers.
list->cursor =
(cursorOffset >= 0 ? list->data + cursorOffset : list->data);
list->last =
(lastOffset >= 0 ? (primhdr_t *) (list->data + lastOffset) : NULL);
// Restore in-list pointers.
if(oldData)
{
hdr = (primhdr_t *) list->data;
while(hdr <= list->last)
{
if(hdr->indices != NULL)
{
hdr->indices =
(uint *) (list->data +
((byte *) hdr->indices - oldData));
}
// Check here in the end; primitive composition may be
// in progress.
if(hdr->size == 0)
break;
hdr = (primhdr_t*) ((byte*) hdr + hdr->size);
}
}
}
// Advance the cursor.
list->cursor += bytes;
return list->data + startOffset;
}
static void allocateIndices(rendlist_t* list, uint numIndices)
{
void* indices;
list->last->numIndices = numIndices;
indices = allocateData(list, sizeof(uint) * numIndices);
// list->last may change during allocateData.
list->last->indices = indices;
}
static void endWrite(rendlist_t* list)
{
// The primitive has been written, update the size in the header.
list->last->size = list->cursor - (byte*) list->last;
// Write the end marker (which will be overwritten by the next
// primitive). The idea is that this zero is interpreted as the
// size of the following primhdr.
*(int*) list->cursor = 0;
}
static void writePrimitive(const rendlist_t* list, uint base,
const rvertex_t* rvertices, const rtexcoord_t* coords,
const rtexcoord_t* coords1, const rtexcoord_t* coords2,
const ColorRawf* rcolors, uint numElements, rendpolytype_t type)
{
uint i;
for(i = 0; i < numElements; ++i)
{
// Vertex.
const rvertex_t* rvtx = &rvertices[i];
dgl_vertex_t* vtx = &vertices[base + i];
vtx->xyz[0] = rvtx->pos[VX];
vtx->xyz[1] = rvtx->pos[VZ];
vtx->xyz[2] = rvtx->pos[VY];
// Sky masked polys need nothing more.
if(type == PT_SKY_MASK) continue;
// Primary texture coordinates.
if(TU(list, TU_PRIMARY)->tex)
{
const rtexcoord_t* rtc = &coords[i];
dgl_texcoord_t* tc = &texCoords[TCA_MAIN][base + i];
tc->st[0] = rtc->st[0];
tc->st[1] = rtc->st[1];
}
// Secondary texture coordinates.
if(TU(list, TU_INTER)->tex)
{
const rtexcoord_t* rtc = &coords1[i];
dgl_texcoord_t* tc = &texCoords[TCA_BLEND][base + i];
tc->st[0] = rtc->st[0];
tc->st[1] = rtc->st[1];
}
// First light texture coordinates.
if((list->last->flags & PF_IS_LIT) && IS_MTEX_LIGHTS)
{
const rtexcoord_t* rtc = &coords2[i];
dgl_texcoord_t* tc = &texCoords[TCA_LIGHT][base + i];
tc->st[0] = rtc->st[0];
tc->st[1] = rtc->st[1];
}
// Color.
{
const ColorRawf* rcolor = &rcolors[i];
dgl_color_t* color = &colors[base + i];
color->rgba[CR] = (DGLubyte) (255 * MINMAX_OF(0, rcolor->rgba[CR], 1));
color->rgba[CG] = (DGLubyte) (255 * MINMAX_OF(0, rcolor->rgba[CG], 1));
color->rgba[CB] = (DGLubyte) (255 * MINMAX_OF(0, rcolor->rgba[CB], 1));
color->rgba[CA] = (DGLubyte) (255 * MINMAX_OF(0, rcolor->rgba[CA], 1));
}
}
}
/**
* Adds one or more polys the render lists depending on configuration.
* \assume Caller knows what they are doing. Arguments are not validity checked.
*/
static void writePoly2(primtype_t type, rendpolytype_t polyType, int flags,
uint numElements, const rvertex_t* vertices, const ColorRawf* colors,
const rtexcoord_t* primaryCoords, const rtexcoord_t* interCoords,
DGLuint modTex, const ColorRawf* modColor, const rtexcoord_t* modCoords)
{
const boolean isLit = (polyType != PT_LIGHT && (modTex || !!(flags & RPF_HAS_DYNLIGHTS)));
uint i, base, primSize, numIndices;
rendlist_t* li;
primhdr_t* hdr;
if(polyType == PT_SKY_MASK)
rDrawSky = true;
BEGIN_PROF( PROF_RL_ADD_POLY );
BEGIN_PROF( PROF_RL_GET_LIST );
// Find/create a rendering list for the polygon's texture.
li = getListFor(polyType, isLit);
END_PROF( PROF_RL_GET_LIST );
primSize = numElements;
numIndices = numElements;
base = allocateVertices(primSize);
hdr = allocateData(li, sizeof(primhdr_t));
assert(hdr);
li->last = hdr; // This becomes the new last primitive.
// Primitive-specific blending mode.
hdr->blendMode = texunits[TU_PRIMARY]->blendMode;
hdr->size = 0;
hdr->indices = NULL;
hdr->numIndices = 0;
hdr->flags = 0;
if(isLit)
{
if(modTex && !(flags & RPF_HAS_DYNLIGHTS))
hdr->flags |= PF_ONE_LIGHT; // Using modulation.
else
hdr->flags |= PF_MANY_LIGHTS;
}
hdr->modTex = modTex;
hdr->modColor[CR] = modColor? modColor->red : 0;
hdr->modColor[CG] = modColor? modColor->green : 0;
hdr->modColor[CB] = modColor? modColor->blue : 0;
hdr->modColor[CA] = 0;
if(polyType == PT_SHINY && texunits[TU_INTER]->tex)
{
hdr->ptexScale[0] = texunits[TU_INTER]->scale[0];
hdr->ptexScale[1] = texunits[TU_INTER]->scale[1];
hdr->ptexOffset[0] = texunits[TU_INTER]->offset[0] * texunits[TU_INTER]->scale[0];
hdr->ptexOffset[1] = texunits[TU_INTER]->offset[1] * texunits[TU_INTER]->scale[1];
}
else if(texunits[TU_PRIMARY]->tex)
{
hdr->ptexScale[0] = texunits[TU_PRIMARY]->scale[0];
hdr->ptexScale[1] = texunits[TU_PRIMARY]->scale[1];
hdr->ptexOffset[0] = texunits[TU_PRIMARY]->offset[0] * texunits[TU_PRIMARY]->scale[0];
hdr->ptexOffset[1] = texunits[TU_PRIMARY]->offset[1] * texunits[TU_PRIMARY]->scale[1];
}
if(texunits[TU_PRIMARY_DETAIL]->tex)
{
hdr->texScale[0] = texunits[TU_PRIMARY_DETAIL]->scale[0];
hdr->texScale[1] = texunits[TU_PRIMARY_DETAIL]->scale[1];
hdr->texOffset[0] = texunits[TU_PRIMARY_DETAIL]->offset[0] * texunits[TU_PRIMARY_DETAIL]->scale[0];
hdr->texOffset[1] = texunits[TU_PRIMARY_DETAIL]->offset[1] * texunits[TU_PRIMARY_DETAIL]->scale[1];
}
else
{
hdr->texScale[0] = hdr->texScale[1] = 1.f;
hdr->texOffset[0] = hdr->texOffset[1] = 1.f;
}
// Setup the indices.
allocateIndices(li, numIndices);
for(i = 0; i < numIndices; ++i)
li->last->indices[i] = base + i;
li->last->type =
(type == PT_TRIANGLE_STRIP? GL_TRIANGLE_STRIP : GL_TRIANGLE_FAN);
writePrimitive(li, base, vertices, primaryCoords, interCoords,
modCoords, colors, numElements, polyType);
endWrite(li);
END_PROF( PROF_RL_ADD_POLY );
}
/**
* Rationalizes write arguments prior to flushing the write.
* Implemented for the purposes of cleaner/more readable code in modules which
* interface with this.
*/
static void writePoly(primtype_t type, rendpolytype_t polyType, int flags,
uint numElements, const rvertex_t* vertices, const ColorRawf* colors,
const rtexcoord_t* primaryCoords, const rtexcoord_t* interCoords,
DGLuint modTex, const ColorRawf* modColor, const rtexcoord_t* modCoords)
{
if(numElements < 3) return; // huh?
/// \todo Logical disconnect: modulation VS dynlight multitexture state.
if(modTex && !RL_IsMTexLights())
Con_Error("RL_AddPoly: Attempt to write modulated primitive with multitexture disabled.");
if(flags & RPF_SKYMASK)
{
flags &= ~(RPF_LIGHT|RPF_SHADOW|RPF_HAS_DYNLIGHTS);
colors = NULL;
primaryCoords = NULL;
interCoords = NULL;
modTex = 0;
modColor = NULL;
modCoords = NULL;
}
else if(flags & RPF_LIGHT)
{
flags &= ~(RPF_SHADOW|RPF_HAS_DYNLIGHTS);
interCoords = NULL;
modTex = 0;
modColor = NULL;
modCoords = NULL;
}
else if(flags & RPF_SHADOW)
{
flags &= ~RPF_HAS_DYNLIGHTS;
interCoords = NULL;
modTex = 0;
modColor = NULL;
modCoords = NULL;
}
// Flush the write.
writePoly2(type, polyType, flags, numElements, vertices,
colors, primaryCoords, interCoords, modTex, modColor, modCoords);
}
static __inline boolean validRTUIndex(uint idx)
{
return idx < NUM_TEXMAP_UNITS;
}
static __inline void errorIfNotValidRTUIndex(uint idx, const char* callerName)
{
if(validRTUIndex(idx)) return;
Con_Error("%s: Invalid texture unit index %u.", callerName, idx);
exit(1); // Unreachable.
}
static __inline boolean isWriteStateRTU(const rtexmapunit_t* ptr)
{
// Note that the default texture unit is not considered as being
// part of the write state.
return ptr >= &rtuState[0] && ptr <= &rtuState[NUM_TEXMAP_UNITS];
}
/**
* If the identified @idx texture unit of the primitive writer has been
* mapped to an external address, insert a copy of it into our internal
* write state.
*
* To be called before customizing a texture unit begins to ensure we
* are modifying data we have ownership of!
*/
static void copyMappedRtuToState(uint idx)