//----------------------------------------------------------------------------//
void OpenGLRenderer::beginRendering()
{
//save current attributes
glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS);
glPushAttrib(GL_ALL_ATTRIB_BITS);
// save current matrices
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
// do required set-up. yes, it really is this minimal ;)
glEnable(GL_SCISSOR_TEST);
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
// force set blending ops to get to a known state.
setupRenderingBlendMode(BM_NORMAL, true);
// enable arrays that we'll be using in the batches
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_SECONDARY_COLOR_ARRAY);
glDisableClientState(GL_INDEX_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
glDisableClientState(GL_FOG_COORDINATE_ARRAY);
glDisableClientState(GL_EDGE_FLAG_ARRAY);
// if enabled, restores a subset of the GL state back to default values.
if (d_initExtraStates)
setupExtraStates();
}
//----------------------------------------------------------------------------//
void Direct3D9Renderer::beginRendering()
{
d_device->SetFVF(D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1);
// no shaders initially
d_device->SetVertexShader(0);
d_device->SetPixelShader(0);
// set device states
d_device->SetRenderState(D3DRS_LIGHTING, FALSE);
d_device->SetRenderState(D3DRS_FOGENABLE, FALSE);
d_device->SetRenderState(D3DRS_ZENABLE, D3DZB_FALSE);
d_device->SetRenderState(D3DRS_ALPHATESTENABLE, FALSE);
d_device->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);
d_device->SetRenderState(D3DRS_FILLMODE, D3DFILL_SOLID);
d_device->SetRenderState(D3DRS_SCISSORTESTENABLE, TRUE);
d_device->SetRenderState(D3DRS_ZWRITEENABLE, FALSE);
// setup texture addressing settings
d_device->SetSamplerState(0, D3DSAMP_ADDRESSU, D3DTADDRESS_CLAMP);
d_device->SetSamplerState(0, D3DSAMP_ADDRESSV, D3DTADDRESS_CLAMP);
// setup colour calculations
d_device->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
d_device->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE);
d_device->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE);
// setup alpha calculations
d_device->SetTextureStageState(0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE);
d_device->SetTextureStageState(0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE);
d_device->SetTextureStageState(0, D3DTSS_ALPHAOP, D3DTOP_MODULATE);
// setup filtering
d_device->SetSamplerState(0, D3DSAMP_MINFILTER, D3DTEXF_LINEAR);
d_device->SetSamplerState(0, D3DSAMP_MAGFILTER, D3DTEXF_LINEAR);
// disable texture stages we do not need.
d_device->SetTextureStageState(1, D3DTSS_COLOROP, D3DTOP_DISABLE);
// setup scene alpha blending
d_device->SetRenderState(D3DRS_ALPHABLENDENABLE, TRUE);
// put alpha blend operations into a known state
setupRenderingBlendMode(BM_NORMAL, true);
// set view matrix back to identity.
d_device->SetTransform(D3DTS_VIEW, &s_identityMatrix);
}
//----------------------------------------------------------------------------//
void OpenGL3Renderer::beginRendering()
{
// do required set-up. yes, it really is this minimal ;)
glEnable(GL_SCISSOR_TEST);
glEnable(GL_BLEND);
// force set blending ops to get to a known state.
setupRenderingBlendMode(BM_NORMAL, true);
// if enabled, restores a subset of the GL state back to default values.
if (d_initExtraStates)
setupExtraStates();
d_shaderStandard->bind();
d_openGLStateChanger->reset();
}
