void Rend_DrawMaskedWall(drawmaskedwallparams_t const &parms)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
TextureVariant *tex = nullptr;
if(::renderTextures)
{
MaterialAnimator *matAnimator = parms.animator;
DENG2_ASSERT(matAnimator);
// Ensure we have up to date info about the material.
matAnimator->prepare();
tex = matAnimator->texUnit(MaterialAnimator::TU_LAYER0).texture;
}
// Do we have a dynamic light to blend with?
// This only happens when multitexturing is enabled.
bool withDyn = false;
dint normal = 0, dyn = 1;
if(parms.modTex && ::numTexUnits > 1)
{
if(IS_MUL)
{
normal = 1;
dyn = 0;
}
else
{
normal = 0;
dyn = 1;
}
GL_SelectTexUnits(2);
GL_ModulateTexture(IS_MUL ? 4 : 5);
// The dynamic light.
glActiveTexture(IS_MUL ? GL_TEXTURE0 : GL_TEXTURE1);
/// @todo modTex may be the name of a "managed" texture.
GL_BindTextureUnmanaged(renderTextures ? parms.modTex : 0,
gl::ClampToEdge, gl::ClampToEdge);
glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, parms.modColor);
// The actual texture.
glActiveTexture(IS_MUL ? GL_TEXTURE1 : GL_TEXTURE0);
GL_BindTexture(tex);
withDyn = true;
}
else
{
GL_ModulateTexture(1);
glEnable(GL_TEXTURE_2D);
GL_BindTexture(tex);
normal = 0;
}
GL_BlendMode(parms.blendMode);
GLenum normalTarget = normal? GL_TEXTURE1 : GL_TEXTURE0;
GLenum dynTarget = dyn? GL_TEXTURE1 : GL_TEXTURE0;
// Draw one quad. This is obviously not a very efficient way to render
// lots of masked walls, but since 3D models and sprites must be
// rendered interleaved with masked walls, there's not much that can be
// done about this.
if(withDyn)
{
glBegin(GL_QUADS);
glColor4fv(parms.vertices[0].color);
glMultiTexCoord2f(normalTarget, parms.texCoord[0][0], parms.texCoord[1][1]);
glMultiTexCoord2f(dynTarget, parms.modTexCoord[0][0], parms.modTexCoord[1][1]);
glVertex3f(parms.vertices[0].pos[0],
parms.vertices[0].pos[2],
parms.vertices[0].pos[1]);
glColor4fv(parms.vertices[1].color);
glMultiTexCoord2f(normalTarget, parms.texCoord[0][0], parms.texCoord[0][1]);
glMultiTexCoord2f(dynTarget, parms.modTexCoord[0][0], parms.modTexCoord[0][1]);
glVertex3f(parms.vertices[1].pos[0],
parms.vertices[1].pos[2],
parms.vertices[1].pos[1]);
glColor4fv(parms.vertices[3].color);
glMultiTexCoord2f(normalTarget, parms.texCoord[1][0], parms.texCoord[0][1]);
glMultiTexCoord2f(dynTarget, parms.modTexCoord[1][0], parms.modTexCoord[0][1]);
glVertex3f(parms.vertices[3].pos[0],
parms.vertices[3].pos[2],
parms.vertices[3].pos[1]);
glColor4fv(parms.vertices[2].color);
glMultiTexCoord2f(normalTarget, parms.texCoord[1][0], parms.texCoord[1][1]);
glMultiTexCoord2f(dynTarget, parms.modTexCoord[1][0], parms.modTexCoord[1][1]);
glVertex3f(parms.vertices[2].pos[0],
parms.vertices[2].pos[2],
parms.vertices[2].pos[1]);
glEnd();
// Restore normal GL state.
GL_SelectTexUnits(1);
GL_ModulateTexture(1);
}
else
{
glBegin(GL_QUADS);
glColor4fv(parms.vertices[0].color);
glTexCoord2f(parms.texCoord[0][0], parms.texCoord[1][1]);
glVertex3f(parms.vertices[0].pos[0],
parms.vertices[0].pos[2],
parms.vertices[0].pos[1]);
glColor4fv(parms.vertices[1].color);
glTexCoord2f(parms.texCoord[0][0], parms.texCoord[0][1]);
glVertex3f(parms.vertices[1].pos[0],
parms.vertices[1].pos[2],
parms.vertices[1].pos[1]);
glColor4fv(parms.vertices[3].color);
glTexCoord2f(parms.texCoord[1][0], parms.texCoord[0][1]);
glVertex3f(parms.vertices[3].pos[0],
parms.vertices[3].pos[2],
parms.vertices[3].pos[1]);
glColor4fv(parms.vertices[2].color);
glTexCoord2f(parms.texCoord[1][0], parms.texCoord[1][1]);
glVertex3f(parms.vertices[2].pos[0],
parms.vertices[2].pos[2],
parms.vertices[2].pos[1]);
glEnd();
}
glDisable(GL_TEXTURE_2D);
GL_BlendMode(BM_NORMAL);
}
