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ioq3quest/code/renderergl1/tr_backend.c
Zack Middleton 350b8f9c7c Restore OpenGL 1.1 support (GL_CLAMP) 
GL_CLAMP (clamp to border) was changed to GL_CLAMP_TO_EDGE in 2008
(f2baf359). In 2018 (ce1d5406) I made OpenGL 1.2 be required since
GL_CLAMP_TO_EDGE is used.

Restore support for GL_CLAMP in order to support OpenGL 1.1 like vanilla
Quake 3 does. This should allow using the default Microsoft Windows
GDI Generic OpenGL 1.1 driver (untested but it won't fail the version
check at least).

From gpuinfo.org, it looks like drivers stopped advertising support for
GL_SGIS_texture_edge_clamp so use a version check in addition to the
extension check.

r_allowExtensions 0 disables using GL_CLAMP_TO_EDGE in the opengl1
renderer. GL_CLAMP support wasn't added to the opengl2 renderer.
2019-05-28 22:44:57 -05:00

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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "tr_local.h"
backEndData_t *backEndData;
backEndState_t backEnd;
static float s_flipMatrix[16] = {
// convert from our coordinate system (looking down X)
// to OpenGL's coordinate system (looking down -Z)
0, 0, -1, 0,
-1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 0, 1
};
/*
** GL_Bind
*/
void GL_Bind( image_t *image ) {
int texnum;
if ( !image ) {
ri.Printf( PRINT_WARNING, "GL_Bind: NULL image\n" );
texnum = tr.defaultImage->texnum;
} else {
texnum = image->texnum;
}
if ( r_nobind->integer && tr.dlightImage ) { // performance evaluation option
texnum = tr.dlightImage->texnum;
}
if ( glState.currenttextures[glState.currenttmu] != texnum ) {
if ( image ) {
image->frameUsed = tr.frameCount;
}
glState.currenttextures[glState.currenttmu] = texnum;
qglBindTexture (GL_TEXTURE_2D, texnum);
}
}
/*
** GL_SelectTexture
*/
void GL_SelectTexture( int unit )
{
if ( glState.currenttmu == unit )
{
return;
}
if ( unit == 0 )
{
qglActiveTextureARB( GL_TEXTURE0_ARB );
GLimp_LogComment( "glActiveTextureARB( GL_TEXTURE0_ARB )\n" );
qglClientActiveTextureARB( GL_TEXTURE0_ARB );
GLimp_LogComment( "glClientActiveTextureARB( GL_TEXTURE0_ARB )\n" );
}
else if ( unit == 1 )
{
qglActiveTextureARB( GL_TEXTURE1_ARB );
GLimp_LogComment( "glActiveTextureARB( GL_TEXTURE1_ARB )\n" );
qglClientActiveTextureARB( GL_TEXTURE1_ARB );
GLimp_LogComment( "glClientActiveTextureARB( GL_TEXTURE1_ARB )\n" );
} else {
ri.Error( ERR_DROP, "GL_SelectTexture: unit = %i", unit );
}
glState.currenttmu = unit;
}
/*
** GL_BindMultitexture
*/
void GL_BindMultitexture( image_t *image0, GLuint env0, image_t *image1, GLuint env1 ) {
int texnum0, texnum1;
texnum0 = image0->texnum;
texnum1 = image1->texnum;
if ( r_nobind->integer && tr.dlightImage ) { // performance evaluation option
texnum0 = texnum1 = tr.dlightImage->texnum;
}
if ( glState.currenttextures[1] != texnum1 ) {
GL_SelectTexture( 1 );
image1->frameUsed = tr.frameCount;
glState.currenttextures[1] = texnum1;
qglBindTexture( GL_TEXTURE_2D, texnum1 );
}
if ( glState.currenttextures[0] != texnum0 ) {
GL_SelectTexture( 0 );
image0->frameUsed = tr.frameCount;
glState.currenttextures[0] = texnum0;
qglBindTexture( GL_TEXTURE_2D, texnum0 );
}
}
/*
** GL_Cull
*/
void GL_Cull( int cullType ) {
if ( glState.faceCulling == cullType ) {
return;
}
glState.faceCulling = cullType;
if ( cullType == CT_TWO_SIDED )
{
qglDisable( GL_CULL_FACE );
}
else
{
qboolean cullFront;
qglEnable( GL_CULL_FACE );
cullFront = (cullType == CT_FRONT_SIDED);
if ( backEnd.viewParms.isMirror )
{
cullFront = !cullFront;
}
qglCullFace( cullFront ? GL_FRONT : GL_BACK );
}
}
/*
** GL_TexEnv
*/
void GL_TexEnv( int env )
{
if ( env == glState.texEnv[glState.currenttmu] )
{
return;
}
glState.texEnv[glState.currenttmu] = env;
switch ( env )
{
case GL_MODULATE:
qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
break;
case GL_REPLACE:
qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE );
break;
case GL_DECAL:
qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL );
break;
case GL_ADD:
qglTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD );
break;
default:
ri.Error( ERR_DROP, "GL_TexEnv: invalid env '%d' passed", env );
break;
}
}
/*
** GL_State
**
** This routine is responsible for setting the most commonly changed state
** in Q3.
*/
void GL_State( unsigned long stateBits )
{
unsigned long diff = stateBits ^ glState.glStateBits;
if ( !diff )
{
return;
}
//
// check depthFunc bits
//
if ( diff & GLS_DEPTHFUNC_EQUAL )
{
if ( stateBits & GLS_DEPTHFUNC_EQUAL )
{
qglDepthFunc( GL_EQUAL );
}
else
{
qglDepthFunc( GL_LEQUAL );
}
}
//
// check blend bits
//
if ( diff & ( GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS ) )
{
GLenum srcFactor = GL_ONE, dstFactor = GL_ONE;
if ( stateBits & ( GLS_SRCBLEND_BITS | GLS_DSTBLEND_BITS ) )
{
switch ( stateBits & GLS_SRCBLEND_BITS )
{
case GLS_SRCBLEND_ZERO:
srcFactor = GL_ZERO;
break;
case GLS_SRCBLEND_ONE:
srcFactor = GL_ONE;
break;
case GLS_SRCBLEND_DST_COLOR:
srcFactor = GL_DST_COLOR;
break;
case GLS_SRCBLEND_ONE_MINUS_DST_COLOR:
srcFactor = GL_ONE_MINUS_DST_COLOR;
break;
case GLS_SRCBLEND_SRC_ALPHA:
srcFactor = GL_SRC_ALPHA;
break;
case GLS_SRCBLEND_ONE_MINUS_SRC_ALPHA:
srcFactor = GL_ONE_MINUS_SRC_ALPHA;
break;
case GLS_SRCBLEND_DST_ALPHA:
srcFactor = GL_DST_ALPHA;
break;
case GLS_SRCBLEND_ONE_MINUS_DST_ALPHA:
srcFactor = GL_ONE_MINUS_DST_ALPHA;
break;
case GLS_SRCBLEND_ALPHA_SATURATE:
srcFactor = GL_SRC_ALPHA_SATURATE;
break;
default:
ri.Error( ERR_DROP, "GL_State: invalid src blend state bits" );
break;
}
switch ( stateBits & GLS_DSTBLEND_BITS )
{
case GLS_DSTBLEND_ZERO:
dstFactor = GL_ZERO;
break;
case GLS_DSTBLEND_ONE:
dstFactor = GL_ONE;
break;
case GLS_DSTBLEND_SRC_COLOR:
dstFactor = GL_SRC_COLOR;
break;
case GLS_DSTBLEND_ONE_MINUS_SRC_COLOR:
dstFactor = GL_ONE_MINUS_SRC_COLOR;
break;
case GLS_DSTBLEND_SRC_ALPHA:
dstFactor = GL_SRC_ALPHA;
break;
case GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA:
dstFactor = GL_ONE_MINUS_SRC_ALPHA;
break;
case GLS_DSTBLEND_DST_ALPHA:
dstFactor = GL_DST_ALPHA;
break;
case GLS_DSTBLEND_ONE_MINUS_DST_ALPHA:
dstFactor = GL_ONE_MINUS_DST_ALPHA;
break;
default:
ri.Error( ERR_DROP, "GL_State: invalid dst blend state bits" );
break;
}
qglEnable( GL_BLEND );
qglBlendFunc( srcFactor, dstFactor );
}
else
{
qglDisable( GL_BLEND );
}
}
//
// check depthmask
//
if ( diff & GLS_DEPTHMASK_TRUE )
{
if ( stateBits & GLS_DEPTHMASK_TRUE )
{
qglDepthMask( GL_TRUE );
}
else
{
qglDepthMask( GL_FALSE );
}
}
//
// fill/line mode
//
if ( diff & GLS_POLYMODE_LINE )
{
if ( stateBits & GLS_POLYMODE_LINE )
{
qglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
}
else
{
qglPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
}
}
//
// depthtest
//
if ( diff & GLS_DEPTHTEST_DISABLE )
{
if ( stateBits & GLS_DEPTHTEST_DISABLE )
{
qglDisable( GL_DEPTH_TEST );
}
else
{
qglEnable( GL_DEPTH_TEST );
}
}
//
// alpha test
//
if ( diff & GLS_ATEST_BITS )
{
switch ( stateBits & GLS_ATEST_BITS )
{
case 0:
qglDisable( GL_ALPHA_TEST );
break;
case GLS_ATEST_GT_0:
qglEnable( GL_ALPHA_TEST );
qglAlphaFunc( GL_GREATER, 0.0f );
break;
case GLS_ATEST_LT_80:
qglEnable( GL_ALPHA_TEST );
qglAlphaFunc( GL_LESS, 0.5f );
break;
case GLS_ATEST_GE_80:
qglEnable( GL_ALPHA_TEST );
qglAlphaFunc( GL_GEQUAL, 0.5f );
break;
default:
assert( 0 );
break;
}
}
glState.glStateBits = stateBits;
}
/*
================
RB_Hyperspace
A player has predicted a teleport, but hasn't arrived yet
================
*/
static void RB_Hyperspace( void ) {
float c;
if ( !backEnd.isHyperspace ) {
// do initialization shit
}
c = ( backEnd.refdef.time & 255 ) / 255.0f;
qglClearColor( c, c, c, 1 );
qglClear( GL_COLOR_BUFFER_BIT );
backEnd.isHyperspace = qtrue;
}
static void SetViewportAndScissor( void ) {
qglMatrixMode(GL_PROJECTION);
qglLoadMatrixf( backEnd.viewParms.projectionMatrix );
qglMatrixMode(GL_MODELVIEW);
// set the window clipping
qglViewport( backEnd.viewParms.viewportX, backEnd.viewParms.viewportY,
backEnd.viewParms.viewportWidth, backEnd.viewParms.viewportHeight );
qglScissor( backEnd.viewParms.viewportX, backEnd.viewParms.viewportY,
backEnd.viewParms.viewportWidth, backEnd.viewParms.viewportHeight );
}
/*
=================
RB_BeginDrawingView
Any mirrored or portaled views have already been drawn, so prepare
to actually render the visible surfaces for this view
=================
*/
void RB_BeginDrawingView (void) {
int clearBits = 0;
// sync with gl if needed
if ( r_finish->integer == 1 && !glState.finishCalled ) {
qglFinish ();
glState.finishCalled = qtrue;
}
if ( r_finish->integer == 0 ) {
glState.finishCalled = qtrue;
}
// we will need to change the projection matrix before drawing
// 2D images again
backEnd.projection2D = qfalse;
//
// set the modelview matrix for the viewer
//
SetViewportAndScissor();
// ensures that depth writes are enabled for the depth clear
GL_State( GLS_DEFAULT );
// clear relevant buffers
clearBits = GL_DEPTH_BUFFER_BIT;
if ( r_measureOverdraw->integer || r_shadows->integer == 2 )
{
clearBits |= GL_STENCIL_BUFFER_BIT;
}
if ( r_fastsky->integer && !( backEnd.refdef.rdflags & RDF_NOWORLDMODEL ) )
{
clearBits |= GL_COLOR_BUFFER_BIT; // FIXME: only if sky shaders have been used
#ifdef _DEBUG
qglClearColor( 0.8f, 0.7f, 0.4f, 1.0f ); // FIXME: get color of sky
#else
qglClearColor( 0.0f, 0.0f, 0.0f, 1.0f ); // FIXME: get color of sky
#endif
}
qglClear( clearBits );
if ( ( backEnd.refdef.rdflags & RDF_HYPERSPACE ) )
{
RB_Hyperspace();
return;
}
else
{
backEnd.isHyperspace = qfalse;
}
glState.faceCulling = -1; // force face culling to set next time
// we will only draw a sun if there was sky rendered in this view
backEnd.skyRenderedThisView = qfalse;
// clip to the plane of the portal
if ( backEnd.viewParms.isPortal ) {
float plane[4];
GLdouble plane2[4];
plane[0] = backEnd.viewParms.portalPlane.normal[0];
plane[1] = backEnd.viewParms.portalPlane.normal[1];
plane[2] = backEnd.viewParms.portalPlane.normal[2];
plane[3] = backEnd.viewParms.portalPlane.dist;
plane2[0] = DotProduct (backEnd.viewParms.or.axis[0], plane);
plane2[1] = DotProduct (backEnd.viewParms.or.axis[1], plane);
plane2[2] = DotProduct (backEnd.viewParms.or.axis[2], plane);
plane2[3] = DotProduct (plane, backEnd.viewParms.or.origin) - plane[3];
qglLoadMatrixf( s_flipMatrix );
qglClipPlane (GL_CLIP_PLANE0, plane2);
qglEnable (GL_CLIP_PLANE0);
} else {
qglDisable (GL_CLIP_PLANE0);
}
}
/*
==================
RB_RenderDrawSurfList
==================
*/
void RB_RenderDrawSurfList( drawSurf_t *drawSurfs, int numDrawSurfs ) {
shader_t *shader, *oldShader;
int fogNum, oldFogNum;
int entityNum, oldEntityNum;
int dlighted, oldDlighted;
qboolean depthRange, oldDepthRange, isCrosshair, wasCrosshair;
int i;
drawSurf_t *drawSurf;
int oldSort;
double originalTime;
// save original time for entity shader offsets
originalTime = backEnd.refdef.floatTime;
// clear the z buffer, set the modelview, etc
RB_BeginDrawingView ();
// draw everything
oldEntityNum = -1;
backEnd.currentEntity = &tr.worldEntity;
oldShader = NULL;
oldFogNum = -1;
oldDepthRange = qfalse;
wasCrosshair = qfalse;
oldDlighted = qfalse;
oldSort = -1;
depthRange = qfalse;
backEnd.pc.c_surfaces += numDrawSurfs;
for (i = 0, drawSurf = drawSurfs ; i < numDrawSurfs ; i++, drawSurf++) {
if ( drawSurf->sort == oldSort ) {
// fast path, same as previous sort
rb_surfaceTable[ *drawSurf->surface ]( drawSurf->surface );
continue;
}
oldSort = drawSurf->sort;
R_DecomposeSort( drawSurf->sort, &entityNum, &shader, &fogNum, &dlighted );
//
// change the tess parameters if needed
// a "entityMergable" shader is a shader that can have surfaces from separate
// entities merged into a single batch, like smoke and blood puff sprites
if ( shader != NULL && ( shader != oldShader || fogNum != oldFogNum || dlighted != oldDlighted
|| ( entityNum != oldEntityNum && !shader->entityMergable ) ) ) {
if (oldShader != NULL) {
RB_EndSurface();
}
RB_BeginSurface( shader, fogNum );
oldShader = shader;
oldFogNum = fogNum;
oldDlighted = dlighted;
}
//
// change the modelview matrix if needed
//
if ( entityNum != oldEntityNum ) {
depthRange = isCrosshair = qfalse;
if ( entityNum != REFENTITYNUM_WORLD ) {
backEnd.currentEntity = &backEnd.refdef.entities[entityNum];
// FIXME: e.shaderTime must be passed as int to avoid fp-precision loss issues
backEnd.refdef.floatTime = originalTime - (double)backEnd.currentEntity->e.shaderTime;
// we have to reset the shaderTime as well otherwise image animations start
// from the wrong frame
tess.shaderTime = backEnd.refdef.floatTime - tess.shader->timeOffset;
// set up the transformation matrix
R_RotateForEntity( backEnd.currentEntity, &backEnd.viewParms, &backEnd.or );
// set up the dynamic lighting if needed
if ( backEnd.currentEntity->needDlights ) {
R_TransformDlights( backEnd.refdef.num_dlights, backEnd.refdef.dlights, &backEnd.or );
}
if(backEnd.currentEntity->e.renderfx & RF_DEPTHHACK)
{
// hack the depth range to prevent view model from poking into walls
depthRange = qtrue;
if(backEnd.currentEntity->e.renderfx & RF_CROSSHAIR)
isCrosshair = qtrue;
}
} else {
backEnd.currentEntity = &tr.worldEntity;
backEnd.refdef.floatTime = originalTime;
backEnd.or = backEnd.viewParms.world;
// we have to reset the shaderTime as well otherwise image animations on
// the world (like water) continue with the wrong frame
tess.shaderTime = backEnd.refdef.floatTime - tess.shader->timeOffset;
R_TransformDlights( backEnd.refdef.num_dlights, backEnd.refdef.dlights, &backEnd.or );
}
qglLoadMatrixf( backEnd.or.modelMatrix );
//
// change depthrange. Also change projection matrix so first person weapon does not look like coming
// out of the screen.
//
if (oldDepthRange != depthRange || wasCrosshair != isCrosshair)
{
if (depthRange)
{
if(backEnd.viewParms.stereoFrame != STEREO_CENTER)
{
if(isCrosshair)
{
if(oldDepthRange)
{
// was not a crosshair but now is, change back proj matrix
qglMatrixMode(GL_PROJECTION);
qglLoadMatrixf(backEnd.viewParms.projectionMatrix);
qglMatrixMode(GL_MODELVIEW);
}
}
else
{
viewParms_t temp = backEnd.viewParms;
R_SetupProjection(&temp, r_znear->value, qfalse);
qglMatrixMode(GL_PROJECTION);
qglLoadMatrixf(temp.projectionMatrix);
qglMatrixMode(GL_MODELVIEW);
}
}
if(!oldDepthRange)
qglDepthRange (0, 0.3);
}
else
{
if(!wasCrosshair && backEnd.viewParms.stereoFrame != STEREO_CENTER)
{
qglMatrixMode(GL_PROJECTION);
qglLoadMatrixf(backEnd.viewParms.projectionMatrix);
qglMatrixMode(GL_MODELVIEW);
}
qglDepthRange (0, 1);
}
oldDepthRange = depthRange;
wasCrosshair = isCrosshair;
}
oldEntityNum = entityNum;
}
// add the triangles for this surface
rb_surfaceTable[ *drawSurf->surface ]( drawSurf->surface );
}
backEnd.refdef.floatTime = originalTime;
// draw the contents of the last shader batch
if (oldShader != NULL) {
RB_EndSurface();
}
// go back to the world modelview matrix
qglLoadMatrixf( backEnd.viewParms.world.modelMatrix );
if ( depthRange ) {
qglDepthRange (0, 1);
}
if (r_drawSun->integer) {
RB_DrawSun(0.1, tr.sunShader);
}
// darken down any stencil shadows
RB_ShadowFinish();
// add light flares on lights that aren't obscured
RB_RenderFlares();
}
/*
============================================================================
RENDER BACK END FUNCTIONS
============================================================================
*/
/*
================
RB_SetGL2D
================
*/
void RB_SetGL2D (void) {
backEnd.projection2D = qtrue;
// set 2D virtual screen size
qglViewport( 0, 0, glConfig.vidWidth, glConfig.vidHeight );
qglScissor( 0, 0, glConfig.vidWidth, glConfig.vidHeight );
qglMatrixMode(GL_PROJECTION);
qglLoadIdentity ();
qglOrtho (0, glConfig.vidWidth, glConfig.vidHeight, 0, 0, 1);
qglMatrixMode(GL_MODELVIEW);
qglLoadIdentity ();
GL_State( GLS_DEPTHTEST_DISABLE |
GLS_SRCBLEND_SRC_ALPHA |
GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA );
GL_Cull( CT_TWO_SIDED );
qglDisable( GL_CLIP_PLANE0 );
// set time for 2D shaders
backEnd.refdef.time = ri.Milliseconds();
backEnd.refdef.floatTime = backEnd.refdef.time * 0.001;
}
/*
=============
RE_StretchRaw
FIXME: not exactly backend
Stretches a raw 32 bit power of 2 bitmap image over the given screen rectangle.
Used for cinematics.
=============
*/
void RE_StretchRaw (int x, int y, int w, int h, int cols, int rows, const byte *data, int client, qboolean dirty) {
int i, j;
int start, end;
if ( !tr.registered ) {
return;
}
R_IssuePendingRenderCommands();
if ( tess.numIndexes ) {
RB_EndSurface();
}
// we definitely want to sync every frame for the cinematics
qglFinish();
start = 0;
if ( r_speeds->integer ) {
start = ri.Milliseconds();
}
// make sure rows and cols are powers of 2
for ( i = 0 ; ( 1 << i ) < cols ; i++ ) {
}
for ( j = 0 ; ( 1 << j ) < rows ; j++ ) {
}
if ( ( 1 << i ) != cols || ( 1 << j ) != rows) {
ri.Error (ERR_DROP, "Draw_StretchRaw: size not a power of 2: %i by %i", cols, rows);
}
RE_UploadCinematic (w, h, cols, rows, data, client, dirty);
GL_Bind( tr.scratchImage[client] );
if ( r_speeds->integer ) {
end = ri.Milliseconds();
ri.Printf( PRINT_ALL, "qglTexSubImage2D %i, %i: %i msec\n", cols, rows, end - start );
}
RB_SetGL2D();
qglColor3f( tr.identityLight, tr.identityLight, tr.identityLight );
qglBegin (GL_QUADS);
qglTexCoord2f ( 0.5f / cols, 0.5f / rows );
qglVertex2f (x, y);
qglTexCoord2f ( ( cols - 0.5f ) / cols , 0.5f / rows );
qglVertex2f (x+w, y);
qglTexCoord2f ( ( cols - 0.5f ) / cols, ( rows - 0.5f ) / rows );
qglVertex2f (x+w, y+h);
qglTexCoord2f ( 0.5f / cols, ( rows - 0.5f ) / rows );
qglVertex2f (x, y+h);
qglEnd ();
}
void RE_UploadCinematic (int w, int h, int cols, int rows, const byte *data, int client, qboolean dirty) {
GL_Bind( tr.scratchImage[client] );
// if the scratchImage isn't in the format we want, specify it as a new texture
if ( cols != tr.scratchImage[client]->width || rows != tr.scratchImage[client]->height ) {
tr.scratchImage[client]->width = tr.scratchImage[client]->uploadWidth = cols;
tr.scratchImage[client]->height = tr.scratchImage[client]->uploadHeight = rows;
qglTexImage2D( GL_TEXTURE_2D, 0, GL_RGB8, cols, rows, 0, GL_RGBA, GL_UNSIGNED_BYTE, data );
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, haveClampToEdge ? GL_CLAMP_TO_EDGE : GL_CLAMP );
qglTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, haveClampToEdge ? GL_CLAMP_TO_EDGE : GL_CLAMP );
} else {
if (dirty) {
// otherwise, just subimage upload it so that drivers can tell we are going to be changing
// it and don't try and do a texture compression
qglTexSubImage2D( GL_TEXTURE_2D, 0, 0, 0, cols, rows, GL_RGBA, GL_UNSIGNED_BYTE, data );
}
}
}
/*
=============
RB_SetColor
=============
*/
const void *RB_SetColor( const void *data ) {
const setColorCommand_t *cmd;
cmd = (const setColorCommand_t *)data;
backEnd.color2D[0] = cmd->color[0] * 255;
backEnd.color2D[1] = cmd->color[1] * 255;
backEnd.color2D[2] = cmd->color[2] * 255;
backEnd.color2D[3] = cmd->color[3] * 255;
return (const void *)(cmd + 1);
}
/*
=============
RB_StretchPic
=============
*/
const void *RB_StretchPic ( const void *data ) {
const stretchPicCommand_t *cmd;
shader_t *shader;
int numVerts, numIndexes;
cmd = (const stretchPicCommand_t *)data;
if ( !backEnd.projection2D ) {
RB_SetGL2D();
}
shader = cmd->shader;
if ( shader != tess.shader ) {
if ( tess.numIndexes ) {
RB_EndSurface();
}
backEnd.currentEntity = &backEnd.entity2D;
RB_BeginSurface( shader, 0 );
}
RB_CHECKOVERFLOW( 4, 6 );
numVerts = tess.numVertexes;
numIndexes = tess.numIndexes;
tess.numVertexes += 4;
tess.numIndexes += 6;
tess.indexes[ numIndexes ] = numVerts + 3;
tess.indexes[ numIndexes + 1 ] = numVerts + 0;
tess.indexes[ numIndexes + 2 ] = numVerts + 2;
tess.indexes[ numIndexes + 3 ] = numVerts + 2;
tess.indexes[ numIndexes + 4 ] = numVerts + 0;
tess.indexes[ numIndexes + 5 ] = numVerts + 1;
*(int *)tess.vertexColors[ numVerts ] =
*(int *)tess.vertexColors[ numVerts + 1 ] =
*(int *)tess.vertexColors[ numVerts + 2 ] =
*(int *)tess.vertexColors[ numVerts + 3 ] = *(int *)backEnd.color2D;
tess.xyz[ numVerts ][0] = cmd->x;
tess.xyz[ numVerts ][1] = cmd->y;
tess.xyz[ numVerts ][2] = 0;
tess.texCoords[ numVerts ][0][0] = cmd->s1;
tess.texCoords[ numVerts ][0][1] = cmd->t1;
tess.xyz[ numVerts + 1 ][0] = cmd->x + cmd->w;
tess.xyz[ numVerts + 1 ][1] = cmd->y;
tess.xyz[ numVerts + 1 ][2] = 0;
tess.texCoords[ numVerts + 1 ][0][0] = cmd->s2;
tess.texCoords[ numVerts + 1 ][0][1] = cmd->t1;
tess.xyz[ numVerts + 2 ][0] = cmd->x + cmd->w;
tess.xyz[ numVerts + 2 ][1] = cmd->y + cmd->h;
tess.xyz[ numVerts + 2 ][2] = 0;
tess.texCoords[ numVerts + 2 ][0][0] = cmd->s2;
tess.texCoords[ numVerts + 2 ][0][1] = cmd->t2;
tess.xyz[ numVerts + 3 ][0] = cmd->x;
tess.xyz[ numVerts + 3 ][1] = cmd->y + cmd->h;
tess.xyz[ numVerts + 3 ][2] = 0;
tess.texCoords[ numVerts + 3 ][0][0] = cmd->s1;
tess.texCoords[ numVerts + 3 ][0][1] = cmd->t2;
return (const void *)(cmd + 1);
}
/*
=============
RB_DrawSurfs
=============
*/
const void *RB_DrawSurfs( const void *data ) {
const drawSurfsCommand_t *cmd;
// finish any 2D drawing if needed
if ( tess.numIndexes ) {
RB_EndSurface();
}
cmd = (const drawSurfsCommand_t *)data;
backEnd.refdef = cmd->refdef;
backEnd.viewParms = cmd->viewParms;
RB_RenderDrawSurfList( cmd->drawSurfs, cmd->numDrawSurfs );
return (const void *)(cmd + 1);
}
/*
=============
RB_DrawBuffer
=============
*/
const void *RB_DrawBuffer( const void *data ) {
const drawBufferCommand_t *cmd;
cmd = (const drawBufferCommand_t *)data;
qglDrawBuffer( cmd->buffer );
// clear screen for debugging
if ( r_clear->integer ) {
qglClearColor( 1, 0, 0.5, 1 );
qglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
}
return (const void *)(cmd + 1);
}
/*
===============
RB_ShowImages
Draw all the images to the screen, on top of whatever
was there. This is used to test for texture thrashing.
Also called by RE_EndRegistration
===============
*/
void RB_ShowImages( void ) {
int i;
image_t *image;
float x, y, w, h;
int start, end;
if ( !backEnd.projection2D ) {
RB_SetGL2D();
}
qglClear( GL_COLOR_BUFFER_BIT );
qglFinish();
start = ri.Milliseconds();
for ( i=0 ; i<tr.numImages ; i++ ) {
image = tr.images[i];
w = glConfig.vidWidth / 20;
h = glConfig.vidHeight / 15;
x = i % 20 * w;
y = i / 20 * h;
// show in proportional size in mode 2
if ( r_showImages->integer == 2 ) {
w *= image->uploadWidth / 512.0f;
h *= image->uploadHeight / 512.0f;
}
GL_Bind( image );
qglBegin (GL_QUADS);
qglTexCoord2f( 0, 0 );
qglVertex2f( x, y );
qglTexCoord2f( 1, 0 );
qglVertex2f( x + w, y );
qglTexCoord2f( 1, 1 );
qglVertex2f( x + w, y + h );
qglTexCoord2f( 0, 1 );
qglVertex2f( x, y + h );
qglEnd();
}
qglFinish();
end = ri.Milliseconds();
ri.Printf( PRINT_ALL, "%i msec to draw all images\n", end - start );
}
/*
=============
RB_ColorMask
=============
*/
const void *RB_ColorMask(const void *data)
{
const colorMaskCommand_t *cmd = data;
qglColorMask(cmd->rgba[0], cmd->rgba[1], cmd->rgba[2], cmd->rgba[3]);
return (const void *)(cmd + 1);
}
/*
=============
RB_ClearDepth
=============
*/
const void *RB_ClearDepth(const void *data)
{
const clearDepthCommand_t *cmd = data;
if(tess.numIndexes)
RB_EndSurface();
// texture swapping test
if (r_showImages->integer)
RB_ShowImages();
qglClear(GL_DEPTH_BUFFER_BIT);
return (const void *)(cmd + 1);
}
/*
=============
RB_SwapBuffers
=============
*/
const void *RB_SwapBuffers( const void *data ) {
const swapBuffersCommand_t *cmd;
// finish any 2D drawing if needed
if ( tess.numIndexes ) {
RB_EndSurface();
}
// texture swapping test
if ( r_showImages->integer ) {
RB_ShowImages();
}
cmd = (const swapBuffersCommand_t *)data;
// we measure overdraw by reading back the stencil buffer and
// counting up the number of increments that have happened
if ( r_measureOverdraw->integer ) {
int i;
long sum = 0;
unsigned char *stencilReadback;
stencilReadback = ri.Hunk_AllocateTempMemory( glConfig.vidWidth * glConfig.vidHeight );
qglReadPixels( 0, 0, glConfig.vidWidth, glConfig.vidHeight, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, stencilReadback );
for ( i = 0; i < glConfig.vidWidth * glConfig.vidHeight; i++ ) {
sum += stencilReadback[i];
}
backEnd.pc.c_overDraw += sum;
ri.Hunk_FreeTempMemory( stencilReadback );
}
if ( !glState.finishCalled ) {
qglFinish();
}
GLimp_LogComment( "***************** RB_SwapBuffers *****************\n\n\n" );
GLimp_EndFrame();
backEnd.projection2D = qfalse;
return (const void *)(cmd + 1);
}
/*
====================
RB_ExecuteRenderCommands
====================
*/
void RB_ExecuteRenderCommands( const void *data ) {
int t1, t2;
t1 = ri.Milliseconds ();
while ( 1 ) {
data = PADP(data, sizeof(void *));
switch ( *(const int *)data ) {
case RC_SET_COLOR:
data = RB_SetColor( data );
break;
case RC_STRETCH_PIC:
data = RB_StretchPic( data );
break;
case RC_DRAW_SURFS:
data = RB_DrawSurfs( data );
break;
case RC_DRAW_BUFFER:
data = RB_DrawBuffer( data );
break;
case RC_SWAP_BUFFERS:
data = RB_SwapBuffers( data );
break;
case RC_SCREENSHOT:
data = RB_TakeScreenshotCmd( data );
break;
case RC_VIDEOFRAME:
data = RB_TakeVideoFrameCmd( data );
break;
case RC_COLORMASK:
data = RB_ColorMask(data);
break;
case RC_CLEARDEPTH:
data = RB_ClearDepth(data);
break;
case RC_END_OF_LIST:
default:
// stop rendering
t2 = ri.Milliseconds ();
backEnd.pc.msec = t2 - t1;
return;
}
}
}
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