+#if CHAN_TYPE == GL_FLOAT
+ if (ctx->Color.BlendEquationRGB==GL_FUNC_ADD) {
+ r = Rs * sR + Rd * dR;
+ g = Gs * sG + Gd * dG;
+ b = Bs * sB + Bd * dB;
+ a = As * sA + Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_SUBTRACT) {
+ r = Rs * sR - Rd * dR;
+ g = Gs * sG - Gd * dG;
+ b = Bs * sB - Bd * dB;
+ a = As * sA - Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_FUNC_REVERSE_SUBTRACT) {
+ r = Rd * dR - Rs * sR;
+ g = Gd * dG - Gs * sG;
+ b = Bd * dB - Bs * sB;
+ a = Ad * dA - As * sA;
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_MIN) {
+ r = MIN2( Rd, Rs );
+ g = MIN2( Gd, Gs );
+ b = MIN2( Bd, Bs );
+ }
+ else if (ctx->Color.BlendEquationRGB==GL_MAX) {
+ r = MAX2( Rd, Rs );
+ g = MAX2( Gd, Gs );
+ b = MAX2( Bd, Bs );
+ }
+ else {
+ /* should never get here */
+ r = g = b = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ }
+
+ if (ctx->Color.BlendEquationA==GL_FUNC_ADD) {
+ a = As * sA + Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_SUBTRACT) {
+ a = As * sA - Ad * dA;
+ }
+ else if (ctx->Color.BlendEquationA==GL_FUNC_REVERSE_SUBTRACT) {
+ a = Ad * dA - As * sA;
+ }
+ else if (ctx->Color.BlendEquationA==GL_MIN) {
+ a = MIN2( Ad, As );
+ }
+ else if (ctx->Color.BlendEquationA==GL_MAX) {
+ a = MAX2( Ad, As );
+ }
+ else {
+ /* should never get here */
+ a = 0.0F; /* silence uninitialized var warning */
+ _mesa_problem(ctx, "unexpected BlendEquation in blend_general()");
+ }
+
+ /* final clamping */
+ rgba[i][RCOMP] = MAX2( r, 0.0F );
+ rgba[i][GCOMP] = MAX2( g, 0.0F );
+ rgba[i][BCOMP] = MAX2( b, 0.0F );
+ rgba[i][ACOMP] = CLAMP( a, 0.0F, CHAN_MAXF );
+#else
+ if (ctx->Color.BlendEquationRGB==GL_FUNC_ADD) {