Kód:
----- arb ps 2.0 -----
const char diffuse_prg_asm[] =
"!!ARBfp1.0\n"
"TEMP tex, col;"
"ATTRIB texcoord = fragment.texcoord;"
"ATTRIB primcol = fragment.color.primary;"
"PARAM light_col = program.local[0];"
"PARAM consts = {2, -1, 0, 0};"
"OUTPUT outcol = result.color;"
"TEX tex, texcoord, texture, 2D;"
"MAD tex, tex, consts.x, consts.y;"
"MAD col, primcol, consts.x, consts.y;"
"DP3 col.a, tex, col;"
"MUL tex, light_col, primcol.a;"
"MUL outcol, tex, col.a;"
"END";
glGenProgramsARB(1, &diffuse_prg);
glBindProgramARB(GL_FRAGMENT_PROGRAM_ARB, diffuse_prg);
glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
strlen(diffuse_prg_asm), diffuse_prg_asm);
----- ati ps 1.x -----
diffuse_prg = glGenFragmentShadersATI(1);
glBindFragmentShaderATI(diffuse_prg);
glBeginFragmentShaderATI();
// Pass #1:
glSampleMapATI(GL_REG_0_ATI, GL_TEXTURE0_ARB, GL_SWIZZLE_STR_ATI); // color in the texture
// reg0 = L.H
glColorFragmentOp2ATI(GL_DOT3_ATI, GL_REG_0_ATI, GL_NONE, GL_SATURATE_BIT_ATI,
GL_REG_0_ATI, GL_NONE, GL_BIAS_BIT_ATI | GL_2X_BIT_ATI,
GL_PRIMARY_COLOR_ARB, GL_NONE, GL_BIAS_BIT_ATI | GL_2X_BIT_ATI);
// reg0 = reg0 * con0 = (L.H) * light_color
glColorFragmentOp2ATI(GL_MUL_ATI, GL_REG_0_ATI, GL_NONE, GL_NONE,
GL_REG_0_ATI, GL_NONE, GL_NONE,
GL_CON_0_ATI, GL_NONE, GL_NONE);
// reg0 = reg0 * primary_color.alpha = (L.H) * light_color * intensity
glColorFragmentOp2ATI(GL_MUL_ATI, GL_REG_0_ATI, GL_NONE, GL_NONE,
GL_REG_0_ATI, GL_NONE, GL_NONE,
GL_PRIMARY_COLOR_ARB, GL_ALPHA, GL_NONE);
glEndFragmentShaderATI();
------ nv ps 1.x ------
//setup the register combiners to use 1 general combiner (max. 2 on GF 4 MX)
glCombinerParameteriNV(GL_NUM_GENERAL_COMBINERS_NV, 1);
//setup the combiner 1
glCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_A_NV,
GL_TEXTURE0_ARB, GL_EXPAND_NORMAL_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_B_NV,
GL_PRIMARY_COLOR_NV, GL_EXPAND_NORMAL_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_C_NV,
GL_CONSTANT_COLOR0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glCombinerInputNV(GL_COMBINER0_NV, GL_RGB, GL_VARIABLE_D_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glCombinerOutputNV(GL_COMBINER0_NV, GL_RGB, GL_SPARE0_NV, GL_SPARE1_NV,
GL_DISCARD_NV, GL_NONE, GL_NONE, GL_TRUE, GL_FALSE, GL_FALSE);
//setup the final combiner
glFinalCombinerInputNV(GL_VARIABLE_A_NV,
GL_SPARE0_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_B_NV,
GL_SPARE1_NV, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_C_NV,
GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_D_NV,
GL_ZERO, GL_UNSIGNED_IDENTITY_NV, GL_RGB);
glFinalCombinerInputNV(GL_VARIABLE_G_NV,
GL_PRIMARY_COLOR_NV, GL_UNSIGNED_IDENTITY_NV, GL_ALPHA);
glEnable(GL_REGISTER_COMBINERS_NV);
Jinak ten kód je na výpočet difuzní barvy u perpixel (dot3) osvětlení (třeba jako má Doom3 a kdejaká dnešní hra). Výpočet spekulární barvy jsem vyhodil, aby to nebylo zbytečně dlouhé. Tohle je spíš pro rozšíření obzorů.
Re: Vyznam dual core
Původně odeslal Fox!MURDER
Nvidia je bez problemu...
. U desktopu je to stejný jenom jsou ty výkony trochu vejš.
)
