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Implement dFdx, dFdy, and fwidth via new expression opcodes.

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This commit is contained in:
Kenneth Graunke
2010-06-09 14:42:41 -07:00
parent cbd881da3f
commit b843c7a20c
4 changed files with 163 additions and 0 deletions
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builtin_function.cpp
+77
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@@ -2496,6 +2496,82 @@ static const char *functions_for_110 [] = {
/* 110_fs builtins */
static const char *builtins_110_fs_derivatives = {
"((function dFdx\n"
" (signature float\n"
" (parameters\n"
" (declare (in) float p))\n"
" ((return (expression float dFdx (var_ref p)))))\n"
"\n"
" (signature vec2\n"
" (parameters\n"
" (declare (in) vec2 p))\n"
" ((return (expression vec2 dFdx (var_ref p)))))\n"
"\n"
" (signature vec3\n"
" (parameters\n"
" (declare (in) vec3 p))\n"
" ((return (expression vec3 dFdx (var_ref p)))))\n"
"\n"
" (signature vec4\n"
" (parameters\n"
" (declare (in) vec4 p))\n"
" ((return (expression vec4 dFdx (var_ref p)))))\n"
" )\n"
"\n"
" (function dFdy\n"
" (signature float\n"
" (parameters\n"
" (declare (in) float p))\n"
" ((return (expression float dFdy (var_ref p)))))\n"
"\n"
" (signature vec2\n"
" (parameters\n"
" (declare (in) vec2 p))\n"
" ((return (expression vec2 dFdy (var_ref p)))))\n"
"\n"
" (signature vec3\n"
" (parameters\n"
" (declare (in) vec3 p))\n"
" ((return (expression vec3 dFdy (var_ref p)))))\n"
"\n"
" (signature vec4\n"
" (parameters\n"
" (declare (in) vec4 p))\n"
" ((return (expression vec4 dFdy (var_ref p)))))\n"
" )\n"
"\n"
" (function fwidth\n"
" (signature float\n"
" (parameters\n"
" (declare (in) float p))\n"
" ((return (expression float +\n"
" (expression float abs (expression float dFdx (var_ref p)))\n"
" (expression float abs (expression float dFdy (var_ref p)))))))\n"
"\n"
" (signature vec2\n"
" (parameters\n"
" (declare (in) vec2 p))\n"
" ((return (expression vec2 +\n"
" (expression vec2 abs (expression vec2 dFdx (var_ref p)))\n"
" (expression vec2 abs (expression vec2 dFdy (var_ref p)))))))\n"
"\n"
" (signature vec3\n"
" (parameters\n"
" (declare (in) vec3 p))\n"
" ((return (expression vec3 +\n"
" (expression vec3 abs (expression vec3 dFdx (var_ref p)))\n"
" (expression vec3 abs (expression vec3 dFdy (var_ref p)))))))\n"
"\n"
" (signature vec4\n"
" (parameters\n"
" (declare (in) vec4 p))\n"
" ((return (expression vec4 +\n"
" (expression vec4 abs (expression vec4 dFdx (var_ref p)))\n"
" (expression vec4 abs (expression vec4 dFdy (var_ref p)))))))\n"
"))\n"
};
static const char *builtins_110_fs_textures = {
"((function texture1D\n"
" (signature vec4\n"
@@ -2613,6 +2689,7 @@ static const char *builtins_110_fs_textures = {
};
static const char *functions_for_110_fs [] = {
builtins_110_fs_derivatives,
builtins_110_fs_textures,
};