Luca,
I would have expected fragment coord conventions to be device state, not
a part of the shader.
It seems like these new flags are really peers (or replacements?) of the
gl_rasterization_rules flag in pipe_rasterizer_state, and that the
shaders should remain unchanged.
Keith
On Wed, 2010-01-20 at 22:38 -0800, Luca Barbieri wrote:
> This adds two TGSI fragment program properties that indicate the
> fragment coord conventions.
>
> The properties behave as described in the extension spec for
> GL_ARB_fragment_coord_conventions, but the default origin in
> upper left instead of lower left as in OpenGL.
>
> The syntax is:
> PROPERTY FS_COORD_ORIGIN [UPPER_LEFT|LOWER_LEFT]
> PROPERTY FS_COORD_PIXEL_CENTER [HALF_INTEGER|INTEGER]
>
> The names have been chosen for consistency with the GS properties
> and the OpenGL extension spec.
>
> The defaults are of course the previously assumed conventions:
> UPPER_LEFT and HALF_INTEGER.
>
> It also adds 4 caps to indicate support of each of the conventios.
> These caps should be a temporary measure until all drivers support
> all conventions.
>
> Until then, the state tracker will use them to adjust WPOS and provide
> the driver something it supports.
>
> These caps include two "negative caps" indicating lack of support for
> the default DX9/DX10 upper left origin convention, and lack of support
> for the default OpenGL/DX10 half integer center convention.
>
> These are an even more a temporary measure until drivers are fixed.
> ---
> src/gallium/auxiliary/tgsi/tgsi_dump.c | 22 +++++++++-
> src/gallium/auxiliary/tgsi/tgsi_text.c | 63
> +++++++++++++++++++++++++++-
> src/gallium/auxiliary/tgsi/tgsi_ureg.c | 32 ++++++++++++++
> src/gallium/auxiliary/tgsi/tgsi_ureg.h | 7 +++
> src/gallium/include/pipe/p_defines.h | 4 ++
> src/gallium/include/pipe/p_shader_tokens.h | 10 ++++-
> 6 files changed, 135 insertions(+), 3 deletions(-)
>
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_dump.c
> b/src/gallium/auxiliary/tgsi/tgsi_dump.c
> index d7ff262..5494467 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_dump.c
> +++ b/src/gallium/auxiliary/tgsi/tgsi_dump.c
> @@ -159,7 +159,9 @@ static const char *property_names[] =
> {
> "GS_INPUT_PRIMITIVE",
> "GS_OUTPUT_PRIMITIVE",
> - "GS_MAX_OUTPUT_VERTICES"
> + "GS_MAX_OUTPUT_VERTICES",
> + "FS_COORD_ORIGIN",
> + "FS_COORD_PIXEL_CENTER"
> };
>
> static const char *primitive_names[] =
> @@ -176,6 +178,18 @@ static const char *primitive_names[] =
> "POLYGON"
> };
>
> +static const char *fs_coord_origin_names[] =
> +{
> + "UPPER_LEFT",
> + "LOWER_LEFT"
> +};
> +
> +static const char *fs_coord_pixel_center_names[] =
> +{
> + "HALF_INTEGER",
> + "INTEGER"
> +};
> +
>
> static void
> _dump_register_decl(
> @@ -373,6 +387,12 @@ iter_property(
> case TGSI_PROPERTY_GS_OUTPUT_PRIM:
> ENM(prop->u[i].Data, primitive_names);
> break;
> + case TGSI_PROPERTY_FS_COORD_ORIGIN:
> + ENM(prop->u[i].Data, fs_coord_origin_names);
> + break;
> + case TGSI_PROPERTY_FS_COORD_PIXEL_CENTER:
> + ENM(prop->u[i].Data, fs_coord_pixel_center_names);
> + break;
> default:
> SID( prop->u[i].Data );
> break;
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_text.c
> b/src/gallium/auxiliary/tgsi/tgsi_text.c
> index 9fcffed..42832ea 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_text.c
> +++ b/src/gallium/auxiliary/tgsi/tgsi_text.c
> @@ -1116,7 +1116,9 @@ static const char *property_names[] =
> {
> "GS_INPUT_PRIMITIVE",
> "GS_OUTPUT_PRIMITIVE",
> - "GS_MAX_OUTPUT_VERTICES"
> + "GS_MAX_OUTPUT_VERTICES",
> + "FS_COORD_ORIGIN",
> + "FS_COORD_PIXEL_CENTER"
> };
>
> static const char *primitive_names[] =
> @@ -1133,6 +1135,19 @@ static const char *primitive_names[] =
> "POLYGON"
> };
>
> +static const char *fs_coord_origin_names[] =
> +{
> + "UPPER_LEFT",
> + "LOWER_LEFT"
> +};
> +
> +static const char *fs_coord_pixel_center_names[] =
> +{
> + "HALF_INTEGER",
> + "INTEGER"
> +};
> +
> +
> static boolean
> parse_primitive( const char **pcur, uint *primitive )
> {
> @@ -1150,6 +1165,40 @@ parse_primitive( const char **pcur, uint *primitive )
> return FALSE;
> }
>
> +static boolean
> +parse_fs_coord_origin( const char **pcur, uint *fs_coord_origin )
> +{
> + uint i;
> +
> + for (i = 0; i < sizeof(fs_coord_origin_names) /
> sizeof(fs_coord_origin_names[0]); i++) {
> + const char *cur = *pcur;
> +
> + if (str_match_no_case( &cur, fs_coord_origin_names[i])) {
> + *fs_coord_origin = i;
> + *pcur = cur;
> + return TRUE;
> + }
> + }
> + return FALSE;
> +}
> +
> +static boolean
> +parse_fs_coord_pixel_center( const char **pcur, uint *fs_coord_pixel_center )
> +{
> + uint i;
> +
> + for (i = 0; i < sizeof(fs_coord_pixel_center_names) /
> sizeof(fs_coord_pixel_center_names[0]); i++) {
> + const char *cur = *pcur;
> +
> + if (str_match_no_case( &cur, fs_coord_pixel_center_names[i])) {
> + *fs_coord_pixel_center = i;
> + *pcur = cur;
> + return TRUE;
> + }
> + }
> + return FALSE;
> +}
> +
>
> static boolean parse_property( struct translate_ctx *ctx )
> {
> @@ -1191,6 +1240,18 @@ static boolean parse_property( struct translate_ctx
> *ctx )
> ctx->implied_array_size = u_vertices_per_prim(values[0]);
> }
> break;
> + case TGSI_PROPERTY_FS_COORD_ORIGIN:
> + if (!parse_fs_coord_origin(&ctx->cur, &values[0] )) {
> + report_error( ctx, "Unknown coord origin as property: must be
> UPPER_LEFT or LOWER_LEFT!" );
> + return FALSE;
> + }
> + break;
> + case TGSI_PROPERTY_FS_COORD_PIXEL_CENTER:
> + if (!parse_fs_coord_pixel_center(&ctx->cur, &values[0] )) {
> + report_error( ctx, "Unknown coord pixel center as property: must be
> HALF_INTEGER or INTEGER!" );
> + return FALSE;
> + }
> + break;
> default:
> if (!parse_uint(&ctx->cur, &values[0] )) {
> report_error( ctx, "Expected unsigned integer as property!" );
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.c
> b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
> index 8bd6f68..ee109aa 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_ureg.c
> +++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.c
> @@ -134,6 +134,8 @@ struct ureg_program
> unsigned nr_constant_ranges;
>
> unsigned property_gs_input_prim;
> + unsigned char property_fs_coord_origin;
> + unsigned char property_fs_coord_pixel_center;
>
> unsigned nr_addrs;
> unsigned nr_preds;
> @@ -267,6 +269,20 @@ ureg_property_gs_input_prim(struct ureg_program *ureg,
> ureg->property_gs_input_prim = gs_input_prim;
> }
>
> +void
> +ureg_property_fs_coord_origin(struct ureg_program *ureg,
> + unsigned fs_coord_origin)
> +{
> + ureg->property_fs_coord_origin = fs_coord_origin;
> +}
> +
> +void
> +ureg_property_fs_coord_pixel_center(struct ureg_program *ureg,
> + unsigned fs_coord_pixel_center)
> +{
> + ureg->property_fs_coord_pixel_center = fs_coord_pixel_center;
> +}
> +
>
>
> struct ureg_src
> @@ -1104,6 +1120,22 @@ static void emit_decls( struct ureg_program *ureg )
> ureg->property_gs_input_prim);
> }
>
> + if (ureg->property_fs_coord_origin) {
> + assert(ureg->processor == TGSI_PROCESSOR_FRAGMENT);
> +
> + emit_property(ureg,
> + TGSI_PROPERTY_FS_COORD_ORIGIN,
> + ureg->property_fs_coord_origin);
> + }
> +
> + if (ureg->property_fs_coord_pixel_center) {
> + assert(ureg->processor == TGSI_PROCESSOR_FRAGMENT);
> +
> + emit_property(ureg,
> + TGSI_PROPERTY_FS_COORD_PIXEL_CENTER,
> + ureg->property_fs_coord_pixel_center);
> + }
> +
> if (ureg->processor == TGSI_PROCESSOR_VERTEX) {
> for (i = 0; i < UREG_MAX_INPUT; i++) {
> if (ureg->vs_inputs[i/32] & (1 << (i%32))) {
> diff --git a/src/gallium/auxiliary/tgsi/tgsi_ureg.h
> b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
> index 03eaf24..63ddbf5 100644
> --- a/src/gallium/auxiliary/tgsi/tgsi_ureg.h
> +++ b/src/gallium/auxiliary/tgsi/tgsi_ureg.h
> @@ -127,6 +127,13 @@ void
> ureg_property_gs_input_prim(struct ureg_program *ureg,
> unsigned gs_input_prim);
>
> +void
> +ureg_property_fs_coord_origin(struct ureg_program *ureg,
> + unsigned fs_coord_origin);
> +
> +void
> +ureg_property_fs_coord_pixel_center(struct ureg_program *ureg,
> + unsigned fs_coord_pixel_center);
>
> /***********************************************************************
> * Build shader declarations:
> diff --git a/src/gallium/include/pipe/p_defines.h
> b/src/gallium/include/pipe/p_defines.h
> index 35f3830..04d7e30 100644
> --- a/src/gallium/include/pipe/p_defines.h
> +++ b/src/gallium/include/pipe/p_defines.h
> @@ -405,6 +405,10 @@ enum pipe_transfer_usage {
> #define PIPE_CAP_MAX_PREDICATE_REGISTERS 30
> #define PIPE_CAP_MAX_COMBINED_SAMPLERS 31 /*< Maximum texture image units
> accessible from vertex
> and fragment shaders
> combined */
> +#define PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT 32
> +#define PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER 33
> +#define PIPE_NO_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT 34
> +#define PIPE_NO_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER 35
>
>
> /**
> diff --git a/src/gallium/include/pipe/p_shader_tokens.h
> b/src/gallium/include/pipe/p_shader_tokens.h
> index b489b04..4134c70 100644
> --- a/src/gallium/include/pipe/p_shader_tokens.h
> +++ b/src/gallium/include/pipe/p_shader_tokens.h
> @@ -163,7 +163,9 @@ union tgsi_immediate_data
> #define TGSI_PROPERTY_GS_INPUT_PRIM 0
> #define TGSI_PROPERTY_GS_OUTPUT_PRIM 1
> #define TGSI_PROPERTY_GS_MAX_VERTICES 2
> -#define TGSI_PROPERTY_COUNT 3
> +#define TGSI_PROPERTY_FS_COORD_ORIGIN 3
> +#define TGSI_PROPERTY_FS_COORD_PIXEL_CENTER 4
> +#define TGSI_PROPERTY_COUNT 5
>
> struct tgsi_property {
> unsigned Type : 4; /**< TGSI_TOKEN_TYPE_PROPERTY */
> @@ -172,6 +174,12 @@ struct tgsi_property {
> unsigned Padding : 12;
> };
>
> +#define TGSI_FS_COORD_ORIGIN_UPPER_LEFT 0
> +#define TGSI_FS_COORD_ORIGIN_LOWER_LEFT 1
> +
> +#define TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER 0
> +#define TGSI_FS_COORD_PIXEL_CENTER_INTEGER 1
> +
> struct tgsi_property_data {
> unsigned Data;
> };
> --
> 1.6.3.3
>
>
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