diff options
author | Keith Whitwell <keith@tungstengraphics.com> | 2005-01-19 12:09:33 +0000 |
---|---|---|
committer | Keith Whitwell <keith@tungstengraphics.com> | 2005-01-19 12:09:33 +0000 |
commit | 2aa34ea98430047e28b4ac47d09421d53c4b77a2 (patch) | |
tree | a64dc912375a697028646320132c1f5a4f3073df /src/mesa/drivers/dri/unichrome/via_texcombine.c | |
parent | bdb5725bab0fdfffb20bbfb4f2c3d7aa3482c1bc (diff) |
Bring the texcombine fixes to the trunk.
Diffstat (limited to 'src/mesa/drivers/dri/unichrome/via_texcombine.c')
-rw-r--r-- | src/mesa/drivers/dri/unichrome/via_texcombine.c | 218 |
1 files changed, 138 insertions, 80 deletions
diff --git a/src/mesa/drivers/dri/unichrome/via_texcombine.c b/src/mesa/drivers/dri/unichrome/via_texcombine.c index b0afb57364..d30cc05629 100644 --- a/src/mesa/drivers/dri/unichrome/via_texcombine.c +++ b/src/mesa/drivers/dri/unichrome/via_texcombine.c @@ -58,7 +58,6 @@ #define INPUT_B_SHIFT 7 #define INPUT_C_SHIFT 0 #define INPUT_CBias_SHIFT 14 -#define INPUT_ABias_SHIFT 3 #define CONST_ONE (HC_XTC_0 | HC_XTC_InvTOPC) @@ -73,6 +72,11 @@ static const unsigned alpha_operand_modifier[2] = { 0, HC_XTA_InvTOPA }; +static const unsigned bias_alpha_operand_modifier[2] = { + 0, HC_HTXnTBLAbias_Inv +}; + + static const unsigned c_shift_table[3] = { HC_HTXnTBLCshift_No, HC_HTXnTBLCshift_1, HC_HTXnTBLCshift_2 }; @@ -102,15 +106,16 @@ static const unsigned a_shift_table[3] = { * KW: needs attention to the case where texunit 1 is enabled but * texunit 0 is not. */ -void +GLboolean viaTexCombineState( viaContextPtr vmesa, const struct gl_tex_env_combine_state * combine, unsigned unit ) { unsigned color_arg[3]; unsigned alpha_arg[3]; - unsigned color = 0; - unsigned alpha = 0; + unsigned bias_alpha_arg[3]; + unsigned color = HC_HTXnTBLCsat_MASK; + unsigned alpha = HC_HTXnTBLAsat_MASK; unsigned bias = 0; unsigned op = 0; unsigned a_shift = combine->ScaleShiftA; @@ -118,11 +123,18 @@ viaTexCombineState( viaContextPtr vmesa, unsigned i; unsigned constant_color[3]; unsigned ordered_constant_color[4]; - unsigned constant_alpha = 0; + unsigned constant_alpha[3]; unsigned bias_alpha = 0; + unsigned abc_alpha = 0; const struct gl_texture_unit const * texUnit = & vmesa->glCtx->Texture.Unit[unit]; unsigned env_color[4]; + /* It seems that the color clamping can be overwhelmed at the 4x + * scale settings, necessitating this fallback: + */ + if (c_shift == 2 || a_shift == 2) { + return GL_FALSE; + } CLAMPED_FLOAT_TO_UBYTE(env_color[0], texUnit->EnvColor[0]); CLAMPED_FLOAT_TO_UBYTE(env_color[1], texUnit->EnvColor[1]); @@ -131,6 +143,7 @@ viaTexCombineState( viaContextPtr vmesa, (void) memset( constant_color, 0, sizeof( constant_color ) ); (void) memset( ordered_constant_color, 0, sizeof( ordered_constant_color ) ); + (void) memset( constant_alpha, 0, sizeof( constant_alpha ) ); for ( i = 0 ; i < combine->_NumArgsRGB ; i++ ) { const GLint op = combine->OperandRGB[i] - GL_SRC_COLOR; @@ -177,30 +190,6 @@ viaTexCombineState( viaContextPtr vmesa, } } - for ( i = 0 ; i < combine->_NumArgsA ; i++ ) { - const GLint op = combine->OperandA[i] - GL_SRC_ALPHA; - - switch ( combine->SourceA[i] ) { - case GL_TEXTURE: - alpha_arg[i] = HC_XTA_Atex; - alpha_arg[i] += alpha_operand_modifier[op]; - break; - case GL_CONSTANT: - alpha_arg[i] = HC_XTA_HTXnTBLRA; - constant_alpha = (op == 0) - ? env_color[3] : ~(env_color[3]) & 0x000000ff; - break; - case GL_PRIMARY_COLOR: - alpha_arg[i] = HC_XTA_Adif; - alpha_arg[i] += alpha_operand_modifier[op]; - break; - case GL_PREVIOUS: - alpha_arg[i] = (unit == 0) ? HC_XTA_Adif : HC_XTA_Acur; - alpha_arg[i] += alpha_operand_modifier[op]; - break; - } - } - /* On the Unichrome, all combine operations take on some form of: * @@ -210,30 +199,32 @@ viaTexCombineState( viaContextPtr vmesa, * and mask modes are currently unused. With the exception of DOT3, all * standard GL_COMBINE modes can be implemented simply by selecting the * correct inputs for A, B, C, and Bias and the correct operation for op. + * + * NOTE: xBias (when read from the constant registers) is signed, + * and scaled to fit -255..255 in 8 bits, ie 0x1 == 2. */ - color = HC_HTXnTBLCsat_MASK; - alpha = HC_HTXnTBLAsat_MASK; - switch( combine->ModeRGB ) { - /* Ca = 0, Cb = 0, Cc = 0, Cbias = arg0 + /* Ca = 1.0, Cb = arg0, Cc = 0, Cbias = 0 */ case GL_REPLACE: - bias |= (color_arg[0] << INPUT_CBias_SHIFT); - ordered_constant_color[3] = constant_color[0]; + color |= ((CONST_ONE << INPUT_A_SHIFT) | + (color_arg[0] << INPUT_B_SHIFT)); + + ordered_constant_color[1] = constant_color[0]; break; /* Ca = arg[0], Cb = arg[1], Cc = 0, Cbias = 0 */ case GL_MODULATE: - color |= (color_arg[0] << INPUT_A_SHIFT) - | (color_arg[1] << INPUT_B_SHIFT); + color |= ((color_arg[0] << INPUT_A_SHIFT) | + (color_arg[1] << INPUT_B_SHIFT)); ordered_constant_color[0] = constant_color[0]; ordered_constant_color[1] = constant_color[1]; break; - /* Ca = 1.0, Cb = arg[0], Cc = 0, Cbias = arg[1] + /* Ca = 1.0, Cb = arg[0], Cc = arg[1], Cbias = 0 */ case GL_ADD: case GL_SUBTRACT: @@ -241,25 +232,26 @@ viaTexCombineState( viaContextPtr vmesa, op |= HC_HTXnTBLCop_Sub; } - color |= (color_arg[0] << INPUT_B_SHIFT) - | (CONST_ONE << INPUT_A_SHIFT); + color |= ((CONST_ONE << INPUT_A_SHIFT) | + (color_arg[0] << INPUT_B_SHIFT) | + (color_arg[1] << INPUT_C_SHIFT)); - bias |= (color_arg[1] << INPUT_CBias_SHIFT); ordered_constant_color[1] = constant_color[0]; - ordered_constant_color[3] = constant_color[1]; + ordered_constant_color[2] = constant_color[1]; break; - /* Ca = 0, Cb = arg[0], Cc = arg[1], Cbias = 0.5 + /* Ca = 1.0, Cb = arg[0], Cc = arg[1], Cbias = -0.5 */ case GL_ADD_SIGNED: - color |= (color_arg[0] << INPUT_B_SHIFT) - | (color_arg[1] << INPUT_C_SHIFT); + color |= ((CONST_ONE << INPUT_A_SHIFT) | + (color_arg[0] << INPUT_B_SHIFT) | + (color_arg[1] << INPUT_C_SHIFT)); + bias |= HC_HTXnTBLCbias_HTXnTBLRC; - op |= HC_HTXnTBLCop_Sub; ordered_constant_color[1] = constant_color[0]; ordered_constant_color[2] = constant_color[1]; - ordered_constant_color[3] = 0x00808080; + ordered_constant_color[3] = 0x00bfbfbf; /* -.5 */ break; /* Ca = arg[2], Cb = arg[0], Cc = arg[1], Cbias = arg[1] @@ -267,17 +259,19 @@ viaTexCombineState( viaContextPtr vmesa, case GL_INTERPOLATE: op |= HC_HTXnTBLCop_Sub; - color |= (color_arg[2] << INPUT_A_SHIFT) | - (color_arg[0] << INPUT_B_SHIFT) | - (color_arg[1] << INPUT_C_SHIFT); + color |= ((color_arg[2] << INPUT_A_SHIFT) | + (color_arg[0] << INPUT_B_SHIFT) | + (color_arg[1] << INPUT_C_SHIFT)); + bias |= (color_arg[1] << INPUT_CBias_SHIFT); ordered_constant_color[0] = constant_color[2]; ordered_constant_color[1] = constant_color[0]; ordered_constant_color[2] = constant_color[1]; - ordered_constant_color[3] = constant_color[1]; + ordered_constant_color[3] = (constant_color[1] >> 1) & 0x7f7f7f; break; +#if 0 /* At this point this code is completely untested. It appears that the * Unichrome has the same limitation as the Radeon R100. The only * supported post-scale when doing DOT3 bumpmapping is 1x. @@ -288,41 +282,88 @@ viaTexCombineState( viaContextPtr vmesa, case GL_DOT3_RGBA: c_shift = 2; a_shift = 2; - color |= (color_arg[0] << INPUT_A_SHIFT) | - (color_arg[1] << INPUT_B_SHIFT); + color |= ((color_arg[0] << INPUT_A_SHIFT) | + (color_arg[1] << INPUT_B_SHIFT)); op |= HC_HTXnTBLDOT4; break; +#endif + + default: + assert(0); + break; } + + /* The alpha blend stage has the annoying quirk of not having a * hard-wired 0 input, like the color stage. As a result, we have * to program the constant register with 0 and use that as our * 0 input. + * + * (xA * (xB op xC) + xBias) << xShift + * */ + for ( i = 0 ; i < combine->_NumArgsA ; i++ ) { + const GLint op = combine->OperandA[i] - GL_SRC_ALPHA; + + switch ( combine->SourceA[i] ) { + case GL_TEXTURE: + alpha_arg[i] = HC_XTA_Atex; + alpha_arg[i] += alpha_operand_modifier[op]; + bias_alpha_arg[i] = HC_HTXnTBLAbias_Atex; + bias_alpha_arg[i] += bias_alpha_operand_modifier[op]; + break; + case GL_CONSTANT: + alpha_arg[i] = HC_XTA_HTXnTBLRA; + bias_alpha_arg[i] = HC_HTXnTBLAbias_HTXnTBLRAbias; + constant_alpha[i] = (op == 0) ? env_color[3] : (~env_color[3] & 0xff); + break; + case GL_PRIMARY_COLOR: + alpha_arg[i] = HC_XTA_Adif; + alpha_arg[i] += alpha_operand_modifier[op]; + bias_alpha_arg[i] = HC_HTXnTBLAbias_Adif; + bias_alpha_arg[i] += bias_alpha_operand_modifier[op]; + break; + case GL_PREVIOUS: + alpha_arg[i] = (unit == 0) ? HC_XTA_Adif : HC_XTA_Acur; + alpha_arg[i] += alpha_operand_modifier[op]; + bias_alpha_arg[i] = (unit == 0) ? HC_HTXnTBLAbias_Adif : HC_HTXnTBLAbias_Acur; + bias_alpha_arg[i] += bias_alpha_operand_modifier[op]; + break; + } + } + switch( combine->ModeA ) { /* Aa = 0, Ab = 0, Ac = 0, Abias = arg0 */ case GL_REPLACE: - bias |= (alpha_arg[0] << INPUT_ABias_SHIFT); + alpha |= ((HC_XTA_HTXnTBLRA << INPUT_A_SHIFT) | + (HC_XTA_HTXnTBLRA << INPUT_B_SHIFT) | + (HC_XTA_HTXnTBLRA << INPUT_C_SHIFT)); + abc_alpha = 0; - alpha |= (HC_XTA_HTXnTBLRA << INPUT_A_SHIFT) | - (HC_XTA_HTXnTBLRA << INPUT_B_SHIFT) | - (HC_XTA_HTXnTBLRA << INPUT_C_SHIFT); + bias |= bias_alpha_arg[0]; + bias_alpha = constant_alpha[0] >> 1; break; /* Aa = arg[0], Ab = arg[1], Ac = 0, Abias = 0 */ case GL_MODULATE: - alpha |= (alpha_arg[1] << INPUT_A_SHIFT) - | (alpha_arg[0] << INPUT_B_SHIFT) - | (HC_XTA_HTXnTBLRA << INPUT_C_SHIFT); + alpha |= ((alpha_arg[1] << INPUT_A_SHIFT) | + (alpha_arg[0] << INPUT_B_SHIFT) | + (HC_XTA_HTXnTBLRA << INPUT_C_SHIFT)); + + abc_alpha = ((constant_alpha[1] << HC_HTXnTBLRAa_SHIFT) | + (constant_alpha[0] << HC_HTXnTBLRAb_SHIFT) | + (0 << HC_HTXnTBLRAc_SHIFT)); - bias |= (HC_XTA_HTXnTBLRA << INPUT_ABias_SHIFT); + bias |= HC_HTXnTBLAbias_HTXnTBLRAbias; + bias_alpha = 0; break; - /* Aa = 0, Ab = arg[0], Ac = 0, Abias = arg[1] + /* Aa = 1.0, Ab = arg[0], Ac = arg[1], Abias = 0 */ case GL_ADD: case GL_SUBTRACT: @@ -330,22 +371,30 @@ viaTexCombineState( viaContextPtr vmesa, op |= HC_HTXnTBLAop_Sub; } - alpha |= (HC_XTA_HTXnTBLRA << INPUT_A_SHIFT) | - (alpha_arg[0] << INPUT_B_SHIFT) | - (HC_XTA_HTXnTBLRA << INPUT_C_SHIFT); - bias |= (alpha_arg[1] << INPUT_ABias_SHIFT); + alpha |= ((HC_XTA_HTXnTBLRA << INPUT_A_SHIFT) | + (alpha_arg[0] << INPUT_B_SHIFT) | + (alpha_arg[1] << INPUT_C_SHIFT)); + + abc_alpha = ((0xff << HC_HTXnTBLRAa_SHIFT) | + (constant_alpha[0] << HC_HTXnTBLRAb_SHIFT) | + (constant_alpha[1] << HC_HTXnTBLRAc_SHIFT)); + + bias |= HC_HTXnTBLAbias_HTXnTBLRAbias; + bias_alpha = 0; break; - /* Aa = 0, Ab = arg[0], Ac = arg[1], Abias = 0.5 + /* Aa = 1.0, Ab = arg[0], Ac = arg[1], Abias = -0.5 */ case GL_ADD_SIGNED: - op |= HC_HTXnTBLAop_Sub; - - alpha |= (alpha_arg[0] << INPUT_B_SHIFT) - | (alpha_arg[1] << INPUT_C_SHIFT); - bias |= (HC_XTA_HTXnTBLRA << INPUT_ABias_SHIFT); - - bias_alpha = 0x00000080; + alpha |= ((HC_XTA_HTXnTBLRA << INPUT_A_SHIFT) | + (alpha_arg[0] << INPUT_B_SHIFT) | + (alpha_arg[1] << INPUT_C_SHIFT)); + abc_alpha = ((0xff << HC_HTXnTBLRAa_SHIFT) | + (constant_alpha[0] << HC_HTXnTBLRAb_SHIFT) | + (constant_alpha[1] << HC_HTXnTBLRAc_SHIFT)); + + bias |= HC_HTXnTBLAbias_HTXnTBLRAbias; + bias_alpha = 0xbf; break; /* Aa = arg[2], Ab = arg[0], Ac = arg[1], Abias = arg[1] @@ -353,10 +402,15 @@ viaTexCombineState( viaContextPtr vmesa, case GL_INTERPOLATE: op |= HC_HTXnTBLAop_Sub; - alpha |= (alpha_arg[2] << INPUT_A_SHIFT) | - (alpha_arg[0] << INPUT_B_SHIFT) | - (alpha_arg[1] << INPUT_C_SHIFT); - bias |= (alpha_arg[1] << INPUT_ABias_SHIFT); + alpha |= ((alpha_arg[2] << INPUT_A_SHIFT) | + (alpha_arg[0] << INPUT_B_SHIFT) | + (alpha_arg[1] << INPUT_C_SHIFT)); + abc_alpha = ((constant_alpha[2] << HC_HTXnTBLRAa_SHIFT) | + (constant_alpha[0] << HC_HTXnTBLRAb_SHIFT) | + (constant_alpha[1] << HC_HTXnTBLRAc_SHIFT)); + + bias |= bias_alpha_arg[1]; + bias_alpha = constant_alpha[1] >> 1; break; } @@ -370,7 +424,8 @@ viaTexCombineState( viaContextPtr vmesa, vmesa->regHTXnTBLCsat_0 = color; vmesa->regHTXnTBLAsat_0 = alpha; vmesa->regHTXnTBLCop_0 = op | bias; - vmesa->regHTXnTBLRAa_0 = bias_alpha | (constant_alpha << 16); + vmesa->regHTXnTBLRAa_0 = abc_alpha; + vmesa->regHTXnTBLRFog_0 = bias_alpha; vmesa->regHTXnTBLRCa_0 = ordered_constant_color[0]; vmesa->regHTXnTBLRCb_0 = ordered_constant_color[1]; @@ -383,12 +438,15 @@ viaTexCombineState( viaContextPtr vmesa, vmesa->regHTXnTBLCsat_1 = color; vmesa->regHTXnTBLAsat_1 = alpha; vmesa->regHTXnTBLCop_1 = op | bias; - vmesa->regHTXnTBLRAa_1 = bias_alpha | (constant_alpha << 16); + vmesa->regHTXnTBLRAa_1 = abc_alpha; + vmesa->regHTXnTBLRFog_1 = bias_alpha; vmesa->regHTXnTBLRCa_1 = ordered_constant_color[0]; vmesa->regHTXnTBLRCb_1 = ordered_constant_color[1]; vmesa->regHTXnTBLRCc_1 = ordered_constant_color[2]; vmesa->regHTXnTBLRCbias_1 = ordered_constant_color[3]; } + + return GL_TRUE; } |