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wined3d: Only generate the clipplane emulation KIL if a clipplane is used.

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The KIL is quite expensive because it forces drivers to disable early Z
discard. It is cheaper to generate and switch between two shaders.
This commit is contained in:
Stefan Dösinger 2009-08-30 21:02:05 +02:00 committed by Alexandre Julliard
parent 5a1fb6bd9c
commit d6547c535b
2 changed files with 21 additions and 4 deletions
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19
dlls/wined3d/arb_program_shader.c
View File

@ -125,7 +125,8 @@ struct arb_ps_np2fixup_info
struct arb_ps_compile_args
{
struct ps_compile_args super;
DWORD bools; /* WORD is enough, use DWORD for alignment */
WORD bools;
WORD clip; /* only a boolean, use a WORD for alignment */
unsigned char loop_ctrl[MAX_CONST_I][3];
};
@ -3496,7 +3497,7 @@ static GLuint shader_arb_generate_pshader(IWineD3DPixelShaderImpl *This, struct
next_local += fixup->super.num_consts;
}
if (shader_priv->clipplane_emulation != ~0U)
if (shader_priv->clipplane_emulation != ~0U && args->clip)
{
shader_addline(buffer, "KIL fragment.texcoord[%u];\n", shader_priv->clipplane_emulation);
}
@ -4128,6 +4129,20 @@ static inline void find_arb_ps_compile_args(IWineD3DPixelShaderImpl *shader, IWi
if(stateblock->pixelShaderConstantB[i]) args->bools |= ( 1 << i);
}
/* Only enable the clip plane emulation KIL if at least one clipplane is enabled. The KIL instruction
* is quite expensive because it forces the driver to disable early Z discards. It is cheaper to
* duplicate the shader than have a no-op KIL instruction in every shader
*/
if((!((IWineD3DDeviceImpl *) shader->baseShader.device)->vs_clipping) && use_vs(stateblock) &&
stateblock->renderState[WINED3DRS_CLIPPING] && stateblock->renderState[WINED3DRS_CLIPPLANEENABLE])
{
args->clip = 1;
}
else
{
args->clip = 0;
}
/* Skip if unused or local, or supported natively */
int_skip = ~shader->baseShader.reg_maps.integer_constants | shader->baseShader.reg_maps.local_int_consts;
if(int_skip == 0xffff || GL_SUPPORT(NV_FRAGMENT_PROGRAM_OPTION))

6
dlls/wined3d/utils.c
View File

@ -2531,9 +2531,11 @@ void gen_ffp_frag_op(IWineD3DStateBlockImpl *stateblock, struct ffp_frag_setting
} else {
settings->sRGB_write = 0;
}
if(device->vs_clipping || !use_vs(stateblock)) {
if(device->vs_clipping || !use_vs(stateblock) || !stateblock->renderState[WINED3DRS_CLIPPING] ||
!stateblock->renderState[WINED3DRS_CLIPPLANEENABLE]) {
/* No need to emulate clipplanes if GL supports native vertex shader clipping or if
* the fixed function vertex pipeline is used(which always supports clipplanes)
* the fixed function vertex pipeline is used(which always supports clipplanes), or
* if no clipplane is enabled
*/
settings->emul_clipplanes = 0;
} else {