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Merge pull request #6684 from Chaosus/shader_derivative

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Yuri Rubinsky
2023-01-28 09:51:20 +03:00
committed by GitHub
parent 9dd795a6f2 aed85898c4
commit 9eb73f0295
1 changed files with 37 additions and 0 deletions
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tutorials/shaders/shader_reference/shading_language.rst
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@@ -1249,10 +1249,47 @@ is used, it can be scalar or vector.
| vec4 **textureGather** (samplerCube s, vec3 p [, int comps]) | |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| vec_type **dFdx** (vec_type p) | Derivative in ``x`` using local differencing. |
| | Internally, can use either ``dFdxCoarse`` or ``dFdxFine``, but the |
| | decision for which to use is made by the GPU driver. |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| vec_type **dFdxCoarse** (vec_type p) | Calculates derivative with respect to ``x`` window coordinate using |
| | local differencing based on the value of ``p`` for the current |
| | fragment neighbour(s), and will possibly, but not necessarily, |
| | include the value for the current fragment. |
| | This function is not available on ``gl_compatibility`` profile. |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| vec_type **dFdxFine** (vec_type p) | Calculates derivative with respect to ``x`` window coordinate using |
| | local differencing based on the value of ``p`` for the current |
| | fragment and its immediate neighbour(s). |
| | This function is not available on ``gl_compatibility`` profile. |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| vec_type **dFdy** (vec_type p) | Derivative in ``y`` using local differencing. |
| | Internally, can use either ``dFdyCoarse`` or ``dFdyFine``, but the |
| | decision for which to use is made by the GPU driver. |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| vec_type **dFdyCoarse** (vec_type p) | Calculates derivative with respect to ``y`` window coordinate using |
| | local differencing based on the value of ``p`` for the current |
| | fragment neighbour(s), and will possibly, but not necessarily, |
| | include the value for the current fragment. |
| | This function is not available on ``gl_compatibility`` profile. |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| vec_type **dFdyFine** (vec_type p) | Calculates derivative with respect to ``y`` window coordinate using |
| | local differencing based on the value of ``p`` for the current |
| | fragment and its immediate neighbour(s). |
| | This function is not available on ``gl_compatibility`` profile. |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| vec_type **fwidth** (vec_type p) | Sum of absolute derivative in ``x`` and ``y``. |
| | This is the equivalent of using ``abs(dFdx(p)) + abs(dFdy(p))``. |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| vec_type **fwidthCoarse** (vec_type p) | Sum of absolute derivative in ``x`` and ``y``. |
| | This is the equivalent of using |
| | ``abs(dFdxCoarse(p)) + abs(dFdyCoarse(p))``. |
| | This function is not available on ``gl_compatibility`` profile. |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| vec_type **fwidthFine** (vec_type p) | Sum of absolute derivative in ``x`` and ``y``. |
| | This is the equivalent of using |
| | ``abs(dFdxFine(p)) + abs(dFdyFine(p))``. |
| | This function is not available on ``gl_compatibility`` profile. |
+-----------------------------------------------------------------------------+---------------------------------------------------------------------+
| uint **packHalf2x16** (vec2 v) | Convert two 32-bit floating-point numbers into 16-bit |
| | and pack them into a 32-bit unsigned integer and vice-versa. |