/
gl_main.cpp
1503 lines (1245 loc) · 41.2 KB
/
gl_main.cpp
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/** @file gl_main.cpp GL-Graphics Subsystem
* @ingroup gl
*
* @authors Copyright © 2003-2013 Jaakko Keränen <jaakko.keranen@iki.fi>
* @authors Copyright © 2006-2013 Daniel Swanson <danij@dengine.net>
* @authors Copyright © 2006 Jamie Jones <jamie_jones_au@yahoo.com.au>
*
* @par License
* GPL: http://www.gnu.org/licenses/gpl.html
*
* <small>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</small>
*/
#ifdef UNIX
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#endif
#include "de_base.h"
#include "de_console.h"
#include "de_system.h"
#include "de_graphics.h"
#include "de_render.h"
#include "de_misc.h"
#include "de_ui.h"
#include "de_defs.h"
#include "world/map.h"
#include "world/p_object.h"
#include "gl/texturecontent.h"
#include "ui/windowsystem.h"
#include "resource/colorpalettes.h"
#include "resource/hq2x.h"
#include "MaterialSnapshot"
#include "MaterialVariantSpec"
#include "Texture"
#include "api_render.h"
#include <de/DisplayMode>
#include <de/GLState>
D_CMD(Fog);
D_CMD(SetBPP);
D_CMD(SetRes);
D_CMD(SetFullRes);
D_CMD(SetWinRes);
D_CMD(ToggleFullscreen);
D_CMD(ToggleMaximized);
D_CMD(ToggleCentered);
D_CMD(CenterWindow);
D_CMD(DisplayModeInfo);
D_CMD(ListDisplayModes);
using namespace de;
void GL_SetGamma();
extern int maxnumnodes;
extern boolean fillOutlines;
int defResX = 640, defResY = 480, defBPP = 32;
int defFullscreen = true;
int numTexUnits = 1;
boolean envModAdd; // TexEnv: modulate and add is available.
int test3dfx = 0;
int r_detail = true; // Render detail textures (if available).
float vid_gamma = 1.0f, vid_bright = 0, vid_contrast = 1.0f;
float glNearClip, glFarClip;
static boolean initGLOk = false;
static boolean initFullGLOk = false;
static boolean gamma_support = false;
static float oldgamma, oldcontrast, oldbright;
static int fogModeDefault = 0;
static byte fsaaEnabled = true; // default value also specified in CanvasWindow
static byte vsyncEnabled = true;
static viewport_t currentView;
static void videoFSAAChanged()
{
if(novideo || !WindowSystem::hasMain()) return;
WindowSystem::main().updateCanvasFormat();
}
static void videoVsyncChanged()
{
if(novideo || !WindowSystem::hasMain()) return;
#if defined(WIN32) || defined(MACOSX)
GL_SetVSync(Con_GetByte("vid-vsync") != 0);
#else
WindowSystem::main().updateCanvasFormat();
#endif
}
void GL_Register()
{
// Cvars
C_VAR_INT ("rend-dev-wireframe", &renderWireframe, CVF_NO_ARCHIVE, 0, 2);
C_VAR_INT ("rend-fog-default", &fogModeDefault, 0, 0, 2);
// * Render-HUD
C_VAR_FLOAT("rend-hud-offset-scale", &weaponOffsetScale,CVF_NO_MAX, 0, 0);
C_VAR_FLOAT("rend-hud-fov-shift", &weaponFOVShift, CVF_NO_MAX, 0, 1);
C_VAR_BYTE ("rend-hud-stretch", &weaponScaleMode, 0, SCALEMODE_FIRST, SCALEMODE_LAST);
// * Render-Mobj
C_VAR_INT ("rend-mobj-smooth-move", &useSRVO, 0, 0, 2);
C_VAR_INT ("rend-mobj-smooth-turn", &useSRVOAngle, 0, 0, 1);
// * video
C_VAR_BYTE2("vid-vsync", &vsyncEnabled, 0, 0, 1, videoVsyncChanged);
C_VAR_BYTE2("vid-fsaa", &fsaaEnabled, 0, 0, 1, videoFSAAChanged);
C_VAR_INT ("vid-res-x", &defResX, CVF_NO_MAX | CVF_READ_ONLY | CVF_NO_ARCHIVE, 320, 0);
C_VAR_INT ("vid-res-y", &defResY, CVF_NO_MAX | CVF_READ_ONLY | CVF_NO_ARCHIVE, 240, 0);
C_VAR_INT ("vid-bpp", &defBPP, CVF_READ_ONLY | CVF_NO_ARCHIVE, 16, 32);
C_VAR_INT ("vid-fullscreen", &defFullscreen, CVF_READ_ONLY | CVF_NO_ARCHIVE, 0, 1);
C_VAR_FLOAT("vid-gamma", &vid_gamma, 0, 0.1f, 4);
C_VAR_FLOAT("vid-contrast", &vid_contrast, 0, 0, 2.5f);
C_VAR_FLOAT("vid-bright", &vid_bright, 0, -1, 1);
// Ccmds
C_CMD_FLAGS("fog", NULL, Fog, CMDF_NO_NULLGAME|CMDF_NO_DEDICATED);
C_CMD ("displaymode", "", DisplayModeInfo);
C_CMD ("listdisplaymodes", "", ListDisplayModes);
C_CMD ("setcolordepth", "i", SetBPP);
C_CMD ("setbpp", "i", SetBPP);
C_CMD ("setres", "ii", SetRes);
C_CMD ("setfullres", "ii", SetFullRes);
C_CMD ("setwinres", "ii", SetWinRes);
C_CMD ("setvidramp", "", UpdateGammaRamp);
C_CMD ("togglefullscreen", "", ToggleFullscreen);
C_CMD ("togglemaximized", "", ToggleMaximized);
C_CMD ("togglecentered", "", ToggleCentered);
C_CMD ("centerwindow", "", CenterWindow);
GL_TexRegister();
}
boolean GL_IsInited()
{
return initGLOk;
}
boolean GL_IsFullyInited()
{
return initFullGLOk;
}
#if defined(WIN32) || defined(MACOSX)
void GL_AssertContextActive()
{
#ifdef WIN32
assert(wglGetCurrentContext() != 0);
#else
assert(CGLGetCurrentContext() != 0);
#endif
}
#endif
void GL_DoUpdate()
{
// Check for color adjustment changes.
if(oldgamma != vid_gamma || oldcontrast != vid_contrast || oldbright != vid_bright)
{
GL_SetGamma();
}
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
// Wait until the right time to show the frame so that the realized
// frame rate is exactly right.
glFlush();
DD_WaitForOptimalUpdateTime();
// Blit screen to video.
ClientWindow::main().swapBuffers();
// We will arrive here always at the same time in relation to the displayed
// frame: it is a good time to update the mouse state.
Mouse_Poll();
}
void GL_GetGammaRamp(DisplayColorTransfer *ramp)
{
if(!gamma_support) return;
DisplayMode_GetColorTransfer(ramp);
}
void GL_SetGammaRamp(DisplayColorTransfer const *ramp)
{
if(!gamma_support) return;
DisplayMode_SetColorTransfer(ramp);
}
/**
* Calculate a gamma ramp and write the result to the location pointed to.
*
* @todo Allow for finer control of the curves (separate red, green, blue).
*
* @param ramp Ptr to the ramp table to write to. Must point to a ushort[768] area of memory.
* @param gamma Non-linear factor (curvature; >1.0 multiplies).
* @param contrast Steepness.
* @param bright Brightness, uniform offset.
*/
void GL_MakeGammaRamp(ushort *ramp, float gamma, float contrast, float bright)
{
DENG_ASSERT(ramp);
double ideal[256]; // After processing clamped to unsigned short.
// Don't allow stupid values.
if(contrast < 0.1f)
contrast = 0.1f;
if(bright > 0.8f) bright = 0.8f;
if(bright < -0.8f) bright = -0.8f;
// Init the ramp as a line with the steepness defined by contrast.
for(int i = 0; i < 256; ++i)
{
ideal[i] = i * contrast - (contrast - 1) * 127;
}
// Apply the gamma curve.
if(gamma != 1)
{
if(gamma <= 0.1f) gamma = 0.1f;
double norm = pow(255, 1 / double(gamma) - 1); // Normalizing factor.
for(int i = 0; i < 256; ++i)
{
ideal[i] = pow(ideal[i], 1 / double(gamma)) / norm;
}
}
// The last step is to add the brightness offset.
for(int i = 0; i < 256; ++i)
{
ideal[i] += bright * 128;
}
// Clamp it and write the ramp table.
for(int i = 0; i < 256; ++i)
{
ideal[i] *= 0x100; // Byte => word
if(ideal[i] < 0) ideal[i] = 0;
if(ideal[i] > 0xffff) ideal[i] = 0xffff;
ramp[i] = ramp[i + 256] = ramp[i + 512] = (unsigned short) ideal[i];
}
}
/**
* Updates the gamma ramp based on vid_gamma, vid_contrast and vid_bright.
*/
void GL_SetGamma()
{
DisplayColorTransfer myramp;
oldgamma = vid_gamma;
oldcontrast = vid_contrast;
oldbright = vid_bright;
GL_MakeGammaRamp(myramp.table, vid_gamma, vid_contrast, vid_bright);
GL_SetGammaRamp(&myramp);
}
static void printConfiguration()
{
LOG_VERBOSE(_E(b) "Render configuration:");
LOG_VERBOSE(" Multisampling: %b") << GL_state.features.multisample;
if(GL_state.features.multisample)
{
LOG_VERBOSE(" Multisampling format: %i") << GL_state.multisampleFormat;
}
LOG_VERBOSE(" Multitexturing: %s") << (numTexUnits > 1? (envModAdd? "full" : "partial") : "not available");
LOG_VERBOSE(" Texture Anisotropy: %s") << (GL_state.features.texFilterAniso? "variable" : "fixed");
LOG_VERBOSE(" Texture Compression: %b") << GL_state.features.texCompression;
LOG_VERBOSE(" Texture NPOT: %b") << GL_state.features.texNonPowTwo;
if(GL_state.forceFinishBeforeSwap)
{
LOG_VERBOSE(" glFinish() forced before swapping buffers.");
}
}
boolean GL_EarlyInit()
{
if(novideo) return true;
if(initGLOk) return true; // Already initialized.
LOG_INFO("Initializing Render subsystem...");
gamma_support = !CommandLine_Check("-noramp");
// We are simple people; two texture units is enough.
numTexUnits = MIN_OF(GL_state.maxTexUnits, MAX_TEX_UNITS);
envModAdd = (GL_state.extensions.texEnvCombNV || GL_state.extensions.texEnvCombATI);
GL_InitDeferredTask();
// Model renderer must be initialized early as it may need to configure
// gl-element arrays.
Rend_ModelInit();
// Check the maximum texture size.
if(GL_state.maxTexSize == 256)
{
LOG_WARNING("Using restricted texture w/h ratio (1:8)");
ratioLimit = 8;
}
// Set a custom maximum size?
if(CommandLine_CheckWith("-maxtex", 1))
{
int customSize = M_CeilPow2(strtol(CommandLine_Next(), 0, 0));
if(GL_state.maxTexSize < customSize)
customSize = GL_state.maxTexSize;
GL_state.maxTexSize = customSize;
LOG_INFO("Using maximum texture size of %i x %i") << GL_state.maxTexSize << GL_state.maxTexSize;
}
if(CommandLine_Check("-outlines"))
{
fillOutlines = false;
LOG_INFO("Textures have outlines");
}
renderTextures = !CommandLine_Exists("-notex");
printConfiguration();
// Initialize the renderer into a 2D state.
GL_Init2DState();
initGLOk = true;
return true;
}
void GL_Init()
{
if(novideo) return;
if(!initGLOk)
{
Con_Error("GL_Init: GL_EarlyInit has not been done yet.\n");
}
// Set the gamma in accordance with vid-gamma, vid-bright and vid-contrast.
GL_SetGamma();
// Initialize one viewport.
R_SetupDefaultViewWindow(0);
R_SetViewGrid(1, 1);
}
void GL_InitRefresh()
{
if(novideo) return;
GL_InitTextureManager();
// Register/create Texture objects for the system textures.
R_InitSystemTextures();
initFullGLOk = true;
}
void GL_ShutdownRefresh()
{
initFullGLOk = false;
R_DestroyColorPalettes();
GL_ShutdownTextureManager();
}
void GL_Shutdown()
{
if(!initGLOk)
return; // Not yet initialized fully.
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
// We won't be drawing anything further but we don't want to shutdown
// with the previous frame still visible as this can lead to unwanted
// artefacts during video context switches on some displays.
//
// Render a few black frames before we continue.
if(!novideo)
{
int i = 0;
do
{
glClear(GL_COLOR_BUFFER_BIT);
GL_DoUpdate();
} while(++i < 3);
}
GL_ShutdownDeferredTask();
FR_Shutdown();
Rend_ModelShutdown();
Sky_Shutdown();
Rend_Reset();
// Ensure the global texture collection is destroyed.
try
{
delete &App_Textures();
}
catch(Error const &)
{} // Ignore this error.
GL_ShutdownRefresh();
// Shutdown OpenGL.
Sys_GLShutdown();
initGLOk = false;
}
void GL_Init2DState()
{
// The variables.
glNearClip = 5;
glFarClip = 16500;
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
// Here we configure the OpenGL state and set the projection matrix.
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glDisable(GL_TEXTURE_1D);
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_CUBE_MAP);
// Default, full area viewport.
//glViewport(0, 0, DENG_WINDOW->width(), DENG_WINDOW->height());
// The projection matrix.
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, 320, 200, 0, -1, 1);
// Default state for the white fog is off.
usingFog = false;
glDisable(GL_FOG);
glFogi(GL_FOG_MODE, (fogModeDefault == 0 ? GL_LINEAR :
fogModeDefault == 1 ? GL_EXP : GL_EXP2));
glFogf(GL_FOG_START, DEFAULT_FOG_START);
glFogf(GL_FOG_END, DEFAULT_FOG_END);
glFogf(GL_FOG_DENSITY, DEFAULT_FOG_DENSITY);
fogColor[0] = DEFAULT_FOG_COLOR_RED;
fogColor[1] = DEFAULT_FOG_COLOR_GREEN;
fogColor[2] = DEFAULT_FOG_COLOR_BLUE;
fogColor[3] = 1;
glFogfv(GL_FOG_COLOR, fogColor);
}
void GL_SwitchTo3DState(boolean push_state, viewport_t const *port, viewdata_t const *viewData)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
if(push_state)
{
// Push the 2D matrices on the stack.
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
}
glEnable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
memcpy(¤tView, port, sizeof(currentView));
viewpx = port->geometry.origin.x + viewData->window.origin.x;
viewpy = port->geometry.origin.y + viewData->window.origin.y;
viewpw = MIN_OF(port->geometry.size.width, viewData->window.size.width);
viewph = MIN_OF(port->geometry.size.height, viewData->window.size.height);
//glViewport(viewpx, FLIP(viewpy + viewph - 1), viewpw, viewph);
GLState::top().setViewport(Rectangleui(viewpx, viewpy, viewpw, viewph)).apply();
// The 3D projection matrix.
GL_ProjectionMatrix();
}
void GL_Restore2DState(int step, viewport_t const *port, viewdata_t const *viewData)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
switch(step)
{
case 1: { // After Restore Step 1 normal player sprites are rendered.
int height = (float)(port->geometry.size.width * viewData->window.size.height / viewData->window.size.width) / port->geometry.size.height * SCREENHEIGHT;
scalemode_t sm = R_ChooseScaleMode(SCREENWIDTH, SCREENHEIGHT,
port->geometry.size.width, port->geometry.size.height,
scalemode_t(weaponScaleMode));
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
if(SCALEMODE_STRETCH == sm)
{
glOrtho(0, SCREENWIDTH, height, 0, -1, 1);
}
else
{
/**
* Use an orthographic projection in native screenspace. Then
* translate and scale the projection to produce an aspect
* corrected coordinate space at 4:3, aligned vertically to
* the bottom and centered horizontally in the window.
*/
glOrtho(0, port->geometry.size.width, port->geometry.size.height, 0, -1, 1);
glTranslatef(port->geometry.size.width/2, port->geometry.size.height, 0);
if(port->geometry.size.width >= port->geometry.size.height)
glScalef((float)port->geometry.size.height/SCREENHEIGHT, (float)port->geometry.size.height/SCREENHEIGHT, 1);
else
glScalef((float)port->geometry.size.width/SCREENWIDTH, (float)port->geometry.size.width/SCREENWIDTH, 1);
// Special case: viewport height is greater than width.
// Apply an additional scaling factor to prevent player sprites looking too small.
if(port->geometry.size.height > port->geometry.size.width)
{
float extraScale = (((float)port->geometry.size.height*2)/port->geometry.size.width) / 2;
glScalef(extraScale, extraScale, 1);
}
glTranslatef(-(SCREENWIDTH/2), -SCREENHEIGHT, 0);
glScalef(1, (float)SCREENHEIGHT/height, 1);
}
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
// Depth testing must be disabled so that psprite 1 will be drawn
// on top of psprite 0 (Doom plasma rifle fire).
glDisable(GL_DEPTH_TEST);
break; }
case 2: // After Restore Step 2 we're back in 2D rendering mode.
//glViewport(currentView.geometry.origin.x, FLIP(currentView.geometry.origin.y + currentView.geometry.size.height - 1),
// currentView.geometry.size.width, currentView.geometry.size.height);
GLState::top().setViewport(Rectangleui(currentView.geometry.origin.x,
currentView.geometry.origin.y,
currentView.geometry.size.width,
currentView.geometry.size.height)).apply();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glDisable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
break;
default:
Con_Error("GL_Restore2DState: Invalid value, step = %i.", step);
break;
}
}
void GL_ProjectionMatrix()
{
// We're assuming pixels are squares.
float aspect = viewpw / (float) viewph;
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(yfov = Rend_FieldOfView() / aspect, aspect, glNearClip, glFarClip);
// We'd like to have a left-handed coordinate system.
glScalef(1, 1, -1);
}
#undef GL_UseFog
DENG_EXTERN_C void GL_UseFog(int yes)
{
usingFog = yes;
}
void GL_SelectTexUnits(int count)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
for(int i = numTexUnits - 1; i >= count; i--)
{
glActiveTexture(GL_TEXTURE0 + i);
glDisable(GL_TEXTURE_2D);
}
// Enable the selected units.
for(int i = count - 1; i >= 0; i--)
{
if(i >= numTexUnits) continue;
glActiveTexture(GL_TEXTURE0 + i);
glEnable(GL_TEXTURE_2D);
}
}
void GL_TotalReset()
{
if(isDedicated) return;
// Update the secondary title and the game status.
//Rend_ConsoleUpdateTitle();
// Release all texture memory.
GL_ResetTextureManager();
GL_ReleaseReservedNames();
#if _DEBUG
Z_CheckHeap();
#endif
}
void GL_TotalRestore()
{
if(isDedicated) return;
// Getting back up and running.
GL_ReserveNames();
GL_Init2DState();
// Choose fonts again.
R_LoadSystemFonts();
//Con_Resize();
/// @todo fixme: Should this use the default MapInfo def if none found? -ds
ded_mapinfo_t *mapInfo = 0;
if(App_World().hasMap())
{
de::Uri mapUri = App_World().map().uri();
mapInfo = Def_GetMapInfo(reinterpret_cast<uri_s *>(&mapUri));
}
// Restore map's fog settings.
if(!mapInfo || !(mapInfo->flags & MIF_FOG))
R_SetupFogDefaults();
else
R_SetupFog(mapInfo->fogStart, mapInfo->fogEnd, mapInfo->fogDensity, mapInfo->fogColor);
#if _DEBUG
Z_CheckHeap();
#endif
}
void GL_BlendMode(blendmode_t mode)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
switch(mode)
{
case BM_ZEROALPHA:
GL_BlendOp(GL_FUNC_ADD);
glBlendFunc(GL_ONE, GL_ZERO);
break;
case BM_ADD:
GL_BlendOp(GL_FUNC_ADD);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
break;
case BM_DARK:
GL_BlendOp(GL_FUNC_ADD);
glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA);
break;
case BM_SUBTRACT:
GL_BlendOp(GL_FUNC_SUBTRACT);
glBlendFunc(GL_ONE, GL_SRC_ALPHA);
break;
case BM_ALPHA_SUBTRACT:
GL_BlendOp(GL_FUNC_SUBTRACT);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
break;
case BM_REVERSE_SUBTRACT:
GL_BlendOp(GL_FUNC_REVERSE_SUBTRACT);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
break;
case BM_MUL:
GL_BlendOp(GL_FUNC_ADD);
glBlendFunc(GL_ZERO, GL_SRC_COLOR);
break;
case BM_INVERSE:
GL_BlendOp(GL_FUNC_ADD);
glBlendFunc(GL_ONE_MINUS_DST_COLOR, GL_ONE_MINUS_SRC_COLOR);
break;
case BM_INVERSE_MUL:
GL_BlendOp(GL_FUNC_ADD);
glBlendFunc(GL_ZERO, GL_ONE_MINUS_SRC_COLOR);
break;
default:
GL_BlendOp(GL_FUNC_ADD);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
break;
}
}
int GL_NumMipmapLevels(int width, int height)
{
int numLevels = 0;
while(width > 1 || height > 1)
{
width /= 2;
height /= 2;
++numLevels;
}
return numLevels;
}
int GL_GetTexAnisoMul(int level)
{
int mul = 1;
// Should anisotropic filtering be used?
if(GL_state.features.texFilterAniso)
{
if(level < 0)
{ // Go with the maximum!
mul = GL_state.maxTexFilterAniso;
}
else
{ // Convert from a DGL aniso level to a multiplier.
// i.e 0 > 1, 1 > 2, 2 > 4, 3 > 8, 4 > 16
switch(level)
{
case 0: mul = 1; break; // x1 (normal)
case 1: mul = 2; break; // x2
case 2: mul = 4; break; // x4
case 3: mul = 8; break; // x8
case 4: mul = 16; break; // x16
default: // Wha?
mul = 1;
break;
}
// Clamp.
if(mul > GL_state.maxTexFilterAniso)
mul = GL_state.maxTexFilterAniso;
}
}
return mul;
}
void GL_SetMaterialUI2(Material *mat, int wrapS, int wrapT)
{
if(!mat) return; // @todo we need a "NULL material".
MaterialVariantSpec const &spec =
App_Materials().variantSpec(UiContext, 0, 1, 0, 0, wrapS, wrapT,
0, 1, 0, false, false, false, false);
GL_BindTexture(&mat->prepare(spec).texture(MTU_PRIMARY));
}
void GL_SetMaterialUI(Material* mat)
{
GL_SetMaterialUI2(mat, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE);
}
void GL_SetPSprite(Material *mat, int tClass, int tMap)
{
if(!mat) return; // @todo we need a "NULL material".
MaterialVariantSpec const &spec =
App_Materials().variantSpec(PSpriteContext, 0, 1, tClass, tMap, GL_CLAMP_TO_EDGE, GL_CLAMP_TO_EDGE,
0, 1, 0, false, true, true, false);
GL_BindTexture(&mat->prepare(spec).texture(MTU_PRIMARY));
}
void GL_SetRawImage(lumpnum_t lumpNum, int wrapS, int wrapT)
{
if(rawtex_t *rawTex = R_GetRawTex(lumpNum))
{
GL_BindTextureUnmanaged(GL_PrepareRawTexture(*rawTex), wrapS, wrapT, (filterUI ? GL_LINEAR : GL_NEAREST));
}
}
void GL_BindTexture(TextureVariant *vtexture)
{
if(BusyMode_InWorkerThread()) return;
// Ensure we have a prepared texture.
uint glTexName = vtexture? vtexture->prepare() : 0;
if(glTexName == 0)
{
GL_SetNoTexture();
return;
}
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
glBindTexture(GL_TEXTURE_2D, glTexName);
Sys_GLCheckError();
// Apply dynamic adjustments to the GL texture state according to our spec.
texturevariantspecification_t const &spec = vtexture->spec();
if(spec.type == TST_GENERAL)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, TS_GENERAL(spec).wrapS);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, TS_GENERAL(spec).wrapT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_MagFilterForVariantSpec(TS_GENERAL(spec)));
if(GL_state.features.texFilterAniso)
{
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT,
GL_GetTexAnisoMul(GL_LogicalAnisoLevelForVariantSpec(TS_GENERAL(spec))));
}
}
}
void GL_BindTextureUnmanaged(DGLuint glName, int wrapS, int wrapT, int magMode)
{
if(BusyMode_InWorkerThread()) return;
if(glName == 0)
{
GL_SetNoTexture();
return;
}
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
glBindTexture(GL_TEXTURE_2D, glName);
Sys_GLCheckError();
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, wrapS);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, wrapT);
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));
}
}
void GL_Bind(GLTextureUnit const &glTU)
{
if(!glTU.hasTexture()) return;
if(!renderTextures)
{
GL_SetNoTexture();
return;
}
if(glTU.textureVariant)
{
GL_BindTexture(glTU.textureVariant);
}
else
{
GL_BindTextureUnmanaged(glTU.textureGLName, glTU.textureGLWrapS,
glTU.textureGLWrapT, glTU.textureGLMagMode);
}
}
void GL_BindTo(GLTextureUnit const &glTU, int unit)
{
if(!glTU.hasTexture()) return;
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
glActiveTexture(GL_TEXTURE0 + byte(unit));
GL_Bind(glTU);
}
void GL_SetNoTexture()
{
if(BusyMode_InWorkerThread()) return;
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
/// @todo Don't actually change the current binding. Instead we should disable
/// all currently enabled texture types.
glBindTexture(GL_TEXTURE_2D, 0);
}
int GL_ChooseSmartFilter(int width, int height, int /*flags*/)
{
if(width >= MINTEXWIDTH && height >= MINTEXHEIGHT)
return 2; // hq2x
return 1; // nearest neighbor.
}
uint8_t* GL_SmartFilter(int method, const uint8_t* src, int width, int height,
int flags, int* outWidth, int* outHeight)
{
int newWidth, newHeight;
uint8_t* out = NULL;
switch(method)
{
default: // linear interpolation.
newWidth = width * 2;
newHeight = height * 2;
out = GL_ScaleBuffer(src, width, height, 4, newWidth, newHeight);
break;
case 1: // nearest neighbor.
newWidth = width * 2;
newHeight = height * 2;
out = GL_ScaleBufferNearest(src, width, height, 4, newWidth, newHeight);
break;
case 2: // hq2x
newWidth = width * 2;
newHeight = height * 2;
out = GL_SmartFilterHQ2x(src, width, height, flags);
break;
};
if(NULL == out)
{ // Unchanged, return the source image.
if(outWidth) *outWidth = width;
if(outHeight) *outHeight = height;
return (uint8_t*)src;
}
if(outWidth) *outWidth = newWidth;
if(outHeight) *outHeight = newHeight;
return out;
}
uint8_t* GL_ConvertBuffer(const uint8_t* in, int width, int height, int informat,
colorpalette_t* palette, int outformat)
{
assert(in);
{
uint8_t* out;
if(width <= 0 || height <= 0)
{
Con_Error("GL_ConvertBuffer: Attempt to convert zero-sized image.");
exit(1); // Unreachable.
}
if(informat <= 2 && palette == NULL)
{
Con_Error("GL_ConvertBuffer: Cannot process image of pixelsize==1 without palette.");
exit(1); // Unreachable.
}
if(informat == outformat)
{ // No conversion necessary.
return (uint8_t*)in;
}
if(NULL == (out = (uint8_t*) malloc(outformat * width * height)))
Con_Error("GL_ConvertBuffer: Failed on allocation of %lu bytes for "
"conversion buffer.", (unsigned long) (outformat * width * height));
// Conversion from pal8(a) to RGB(A).
if(informat <= 2 && outformat >= 3)
{
GL_PalettizeImage(out, outformat, palette, false, in, informat, width, height);
return out;
}
// Conversion from RGB(A) to pal8(a), using pal18To8.