Commit 34738a92 authored by Marek Olšák's avatar Marek Olšák
Browse files

gallium: add caps for POSITION and FACE system values



v2: document the integer behavior

Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com
Reviewed-by: Brian Paul's avatarBrian Paul <brianp@vmware.com>
parent 24737f22
......@@ -292,6 +292,11 @@ The integer capabilities:
supported in vertex shaders.
* ``PIPE_CAP_TGSI_PACK_HALF_FLOAT``: Whether the ``UP2H`` and ``PK2H``
TGSI opcodes are supported.
* ``PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL``: If state trackers should use
a system value for the POSITION fragment shader input.
* ``PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL``: If state trackers should use
a system value for the FACE fragment shader input.
Also, the FACE system value is integer, not float.
.. _pipe_capf:
......
......@@ -2658,7 +2658,8 @@ space coordinate system. After clipping, the X, Y and Z components of the
vertex will be divided by the W value to get normalized device coordinates.
For fragment shaders, TGSI_SEMANTIC_POSITION is used to indicate that
fragment shader input contains the fragment's window position. The X
fragment shader input (or system value, depending on which one is
supported by the driver) contains the fragment's window position. The X
component starts at zero and always increases from left to right.
The Y component starts at zero and always increases but Y=0 may either
indicate the top of the window or the bottom depending on the fragment
......@@ -2770,11 +2771,17 @@ typically only used for legacy graphics APIs.
TGSI_SEMANTIC_FACE
""""""""""""""""""
This label applies to fragment shader inputs only and indicates that
the register contains front/back-face information of the form (F, 0,
0, 1). The first component will be positive when the fragment belongs
to a front-facing polygon, and negative when the fragment belongs to a
back-facing polygon.
This label applies to fragment shader inputs (or system values,
depending on which one is supported by the driver) and indicates that
the register contains front/back-face information.
If it is an input, it will be a floating-point vector in the form (F, 0, 0, 1),
where F will be positive when the fragment belongs to a front-facing polygon,
and negative when the fragment belongs to a back-facing polygon.
If it is a system value, it will be an integer vector in the form (F, 0, 0, 1),
where F is 0xffffffff when the fragment belongs to a front-facing polygon and
0 when the fragment belongs to a back-facing polygon.
TGSI_SEMANTIC_EDGEFLAG
......
......@@ -242,6 +242,8 @@ fd_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
case PIPE_CAP_CLEAR_TEXTURE:
case PIPE_CAP_DRAW_PARAMETERS:
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
case PIPE_CAP_MAX_VIEWPORTS:
......
......@@ -256,6 +256,8 @@ i915_get_param(struct pipe_screen *screen, enum pipe_cap cap)
case PIPE_CAP_CLEAR_TEXTURE:
case PIPE_CAP_DRAW_PARAMETERS:
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
......
......@@ -480,6 +480,8 @@ ilo_get_param(struct pipe_screen *screen, enum pipe_cap param)
case PIPE_CAP_CLEAR_TEXTURE:
case PIPE_CAP_DRAW_PARAMETERS:
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
case PIPE_CAP_VENDOR_ID:
......
......@@ -305,6 +305,8 @@ llvmpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_MULTI_DRAW_INDIRECT:
case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
}
/* should only get here on unhandled cases */
......
......@@ -178,6 +178,8 @@ nv30_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
case PIPE_CAP_CLEAR_TEXTURE:
case PIPE_CAP_DRAW_PARAMETERS:
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
case PIPE_CAP_VENDOR_ID:
......
......@@ -221,6 +221,8 @@ nv50_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
case PIPE_CAP_DRAW_PARAMETERS:
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
case PIPE_CAP_VENDOR_ID:
......
......@@ -210,6 +210,8 @@ nvc0_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
case PIPE_CAP_VERTEXID_NOBASE:
case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
case PIPE_CAP_VENDOR_ID:
......
......@@ -204,6 +204,8 @@ static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
case PIPE_CAP_CLEAR_TEXTURE:
case PIPE_CAP_DRAW_PARAMETERS:
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
/* SWTCL-only features. */
......
......@@ -352,6 +352,8 @@ static int r600_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_MULTI_DRAW_INDIRECT:
case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
......
......@@ -344,6 +344,8 @@ static int si_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_MULTI_DRAW_INDIRECT:
case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
......
......@@ -255,6 +255,8 @@ softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_MULTI_DRAW_INDIRECT:
case PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
}
/* should only get here on unhandled cases */
......
......@@ -388,6 +388,8 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
case PIPE_CAP_COPY_BETWEEN_COMPRESSED_AND_PLAIN_FORMATS:
case PIPE_CAP_CLEAR_TEXTURE:
case PIPE_CAP_DRAW_PARAMETERS:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
}
......
......@@ -193,6 +193,8 @@ vc4_screen_get_param(struct pipe_screen *pscreen, enum pipe_cap param)
case PIPE_CAP_CLEAR_TEXTURE:
case PIPE_CAP_DRAW_PARAMETERS:
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
/* Stream output. */
......
......@@ -223,6 +223,8 @@ virgl_get_param(struct pipe_screen *screen, enum pipe_cap param)
case PIPE_CAP_CLEAR_TEXTURE:
case PIPE_CAP_DRAW_PARAMETERS:
case PIPE_CAP_TGSI_PACK_HALF_FLOAT:
case PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL:
case PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL:
return 0;
case PIPE_CAP_VENDOR_ID:
return 0x1af4;
......
......@@ -639,6 +639,8 @@ enum pipe_cap
PIPE_CAP_TGSI_PACK_HALF_FLOAT,
PIPE_CAP_MULTI_DRAW_INDIRECT,
PIPE_CAP_MULTI_DRAW_INDIRECT_PARAMS,
PIPE_CAP_TGSI_FS_POSITION_IS_SYSVAL,
PIPE_CAP_TGSI_FS_FACE_IS_INTEGER_SYSVAL,
};
#define PIPE_QUIRK_TEXTURE_BORDER_COLOR_SWIZZLE_NV50 (1 << 0)
......
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