<div class="gmail_quote">On 22 July 2012 16:37, Marek Olšák <<a href="mailto:maraeo@gmail.com" target="_blank">maraeo@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> This fixes piglit/fbo-deriv. </blockquote><div> </div><div>Cool, I'm glad that test proved useful for more drivers than just i965 :)</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> --- src/mesa/state_tracker/st_glsl_to_tgsi.cpp | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) diff --git a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp index 45136de..fcd69b1 100644 --- a/src/mesa/state_tracker/st_glsl_to_tgsi.cpp +++ b/src/mesa/state_tracker/st_glsl_to_tgsi.cpp @@ -1448,9 +1448,29 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir) emit(ir, TGSI_OPCODE_DDX, result_dst, op[0]); break; case ir_unop_dFdy: - op[0].negate = ~op[0].negate; - emit(ir, TGSI_OPCODE_DDY, result_dst, op[0]); + { + /* The X component contains 1 or -1 depending on whether the framebuffer + * is a FBO or the window system buffer, respectively. + * It is then multiplied with the source operand of DDY. + */ + static const gl_state_index transform_y_state[STATE_LENGTH] + = { STATE_INTERNAL, STATE_FB_WPOS_Y_TRANSFORM }; + + unsigned transform_y_index = + _mesa_add_state_reference(this->prog->Parameters, + transform_y_state); + + st_src_reg transform_y = st_src_reg(PROGRAM_STATE_VAR, + transform_y_index, + glsl_type::vec4_type); + transform_y.swizzle = SWIZZLE_XXXX; + + st_src_reg temp = get_temp(glsl_type::vec4_type); + + emit(ir, TGSI_OPCODE_MUL, st_dst_reg(temp), transform_y, op[0]); + emit(ir, TGSI_OPCODE_DDY, result_dst, temp); break; + } case ir_unop_noise: { /* At some point, a motivated person could add a better -- 1.7.9.5 _______________________________________________ mesa-dev mailing list <a href="mailto:mesa-dev@lists.freedesktop.org">mesa-dev@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/mesa-dev" target="_blank">http://lists.freedesktop.org/mailman/listinfo/mesa-dev</a> </blockquote></div>