svga: add a separate function to get dx format capabilities from vgpu10 device

Currently we have one function to get format capabailities and
we convert DX10 devcaps back to DX9. This can be confusing.
Going forward we will have a separate function for dealing with dx formats.

This patch also fixes the depth stencil devcap. Instead of hardcoding
the capabilities for the depth stencil formats, we will inquire the
device for the capabilities. Note: we will still need to explicity set
the SVGA3D_DXFMT_SHADER_SAMPLE bit for SVGA3D_R32_FLOAT_X8X24 and
SVGA3D_R24_UNORM_X8 since this bit is not advertised but supported
by the device.

v2: reapply the patch after svga_is_format_supported is moved to svga_format.c

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Neha Bhende <bhenden@vmware.com>

1 files changed, 91 insertions, 97 deletions

diff --git a/src/gallium/drivers/svga/svga_format.c b/src/gallium/drivers/svga/svga_format.c
index 641d4bcce49..59cf41d264e 100644
--- a/src/gallium/drivers/svga/svga_format.c
+++ b/src/gallium/drivers/svga/svga_format.c
@@ -1021,28 +1021,16 @@ static const struct format_cap format_cap_table[] = {
       1, 1, 8, 0
    },
    {
-      /* Special case: no devcap / report sampler and depth/stencil ability
-       */
       "SVGA3D_D32_FLOAT_S8X24_UINT",
       SVGA3D_D32_FLOAT_S8X24_UINT,
-      0, /*SVGA3D_DEVCAP_DXFMT_D32_FLOAT_S8X24_UINT*/
-      1, 1, 8,
-      SVGA3DFORMAT_OP_TEXTURE |
-      SVGA3DFORMAT_OP_CUBETEXTURE |
-      SVGA3DFORMAT_OP_VOLUMETEXTURE |
-      SVGA3DFORMAT_OP_ZSTENCIL
+      SVGA3D_DEVCAP_DXFMT_D32_FLOAT_S8X24_UINT,
+      1, 1, 8, 0
    },
    {
-      /* Special case: no devcap / report sampler and depth/stencil ability
-       */
       "SVGA3D_R32_FLOAT_X8X24",
       SVGA3D_R32_FLOAT_X8X24,
-      0, /*SVGA3D_DEVCAP_DXFMT_R32_FLOAT_X8X24_TYPELESS*/
-      1, 1, 8,
-      SVGA3DFORMAT_OP_TEXTURE |
-      SVGA3DFORMAT_OP_CUBETEXTURE |
-      SVGA3DFORMAT_OP_VOLUMETEXTURE |
-      SVGA3DFORMAT_OP_ZSTENCIL
+      SVGA3D_DEVCAP_DXFMT_R32_FLOAT_X8X24_TYPELESS,
+      1, 1, 8, 0
    },
    {
       "SVGA3D_X32_G8X24_UINT",
@@ -1123,16 +1111,10 @@ static const struct format_cap format_cap_table[] = {
       1, 1, 4, 0
    },
    {
-      /* Special case: no devcap / report sampler and depth/stencil ability
-       */
       "SVGA3D_D32_FLOAT",
       SVGA3D_D32_FLOAT,
-      0, /*SVGA3D_DEVCAP_DXFMT_D32_FLOAT*/
-      1, 1, 4,
-      SVGA3DFORMAT_OP_TEXTURE |
-      SVGA3DFORMAT_OP_CUBETEXTURE |
-      SVGA3DFORMAT_OP_VOLUMETEXTURE |
-      SVGA3DFORMAT_OP_ZSTENCIL
+      SVGA3D_DEVCAP_DXFMT_D32_FLOAT,
+      1, 1, 4, 0
    },
    {
       "SVGA3D_R32_UINT",
@@ -1153,28 +1135,16 @@ static const struct format_cap format_cap_table[] = {
       1, 1, 4, 0
    },
    {
-      /* Special case: no devcap / report sampler and depth/stencil ability
-       */
       "SVGA3D_D24_UNORM_S8_UINT",
       SVGA3D_D24_UNORM_S8_UINT,
-      0, /*SVGA3D_DEVCAP_DXFMT_D24_UNORM_S8_UINT*/
-      1, 1, 4,
-      SVGA3DFORMAT_OP_TEXTURE |
-      SVGA3DFORMAT_OP_CUBETEXTURE |
-      SVGA3DFORMAT_OP_VOLUMETEXTURE |
-      SVGA3DFORMAT_OP_ZSTENCIL
+      SVGA3D_DEVCAP_DXFMT_D24_UNORM_S8_UINT,
+      1, 1, 4, 0
    },
    {
-      /* Special case: no devcap / report sampler and depth/stencil ability
-       */
       "SVGA3D_R24_UNORM_X8",
       SVGA3D_R24_UNORM_X8,
-      0, /*SVGA3D_DEVCAP_DXFMT_R24_UNORM_X8_TYPELESS*/
-      1, 1, 4,
-      SVGA3DFORMAT_OP_TEXTURE |
-      SVGA3DFORMAT_OP_CUBETEXTURE |
-      SVGA3DFORMAT_OP_VOLUMETEXTURE |
-      SVGA3DFORMAT_OP_ZSTENCIL
+      SVGA3D_DEVCAP_DXFMT_R24_UNORM_X8_TYPELESS,
+      1, 1, 4, 0
    },
    {
       "SVGA3D_X24_G8_UINT",
@@ -1476,12 +1446,8 @@ static const struct format_cap format_cap_table[] = {
    {
       "SVGA3D_D16_UNORM",
       SVGA3D_D16_UNORM,
-      0, /*SVGA3D_DEVCAP_DXFMT_D16_UNORM*/
-      1, 1, 2,
-      SVGA3DFORMAT_OP_TEXTURE |
-      SVGA3DFORMAT_OP_CUBETEXTURE |
-      SVGA3DFORMAT_OP_VOLUMETEXTURE |
-      SVGA3DFORMAT_OP_ZSTENCIL
+      SVGA3D_DEVCAP_DXFMT_D16_UNORM,
+      1, 1, 2, 0
    },
    {
       "SVGA3D_A8_UNORM",
@@ -1805,40 +1771,57 @@ svga_get_format_cap(struct svga_screen *ss,
 
    if (entry->devcap && sws->get_cap(sws, entry->devcap, &result)) {
       assert(format < SVGA3D_UYVY || entry->defaultOperations == 0);
+      caps->value = result.u;
+   } else {
+      /* Implicitly advertised format -- use default caps */
+      caps->value = entry->defaultOperations;
+   }
+}
 
-      /* Explicitly advertised format */
-      if (entry->devcap > SVGA3D_DEVCAP_DXCONTEXT) {
-         /* Translate DX/VGPU10 format cap to VGPU9 cap */
 
-         if (0) {
-            debug_printf("format %s, devcap %s, value 0x%x (%s)\n",
-                         svga_format_name(format),
-                         svga_devcap_name(entry->devcap),
-                         result.u,
-                         svga_devcap_format_flags(result.u));
-         }
+/*
+ * Get DX format capabilities from VGPU10 device.
+ */
+static void
+svga_get_dx_format_cap(struct svga_screen *ss,
+                       SVGA3dSurfaceFormat format,
+                       SVGA3dDevCapResult *caps)
+{
+   struct svga_winsys_screen *sws = ss->sws;
+   const struct format_cap *entry;
 
-         caps->value = 0;
-         if (result.u & SVGA3D_DXFMT_COLOR_RENDERTARGET)
-            caps->value |= SVGA3DFORMAT_OP_OFFSCREEN_RENDERTARGET;
-         if (!(result.u & SVGA3D_DXFMT_BLENDABLE))
-            caps->value |= SVGA3DFORMAT_OP_NOALPHABLEND;
-         if (result.u & SVGA3D_DXFMT_DEPTH_RENDERTARGET)
-            caps->value |= SVGA3DFORMAT_OP_ZSTENCIL;
-         if (result.u & SVGA3D_DXFMT_SHADER_SAMPLE)
-            caps->value |= (SVGA3DFORMAT_OP_TEXTURE |
-                            SVGA3DFORMAT_OP_CUBETEXTURE);
-         if (result.u & SVGA3D_DXFMT_VOLUME)
-            caps->value |= SVGA3DFORMAT_OP_VOLUMETEXTURE;
-      }
-      else {
-         /* Return VGPU9 format cap as-is */
-         caps->value = result.u;
+#ifdef DEBUG
+   check_format_tables();
+#else
+   (void) check_format_tables;
+#endif
+
+   assert(ss->sws->have_vgpu10);
+   assert(format < ARRAY_SIZE(format_cap_table));
+   entry = &format_cap_table[format];
+   assert(entry->format == format);
+   assert(entry->devcap > SVGA3D_DEVCAP_DXCONTEXT);
+
+   caps->u = 0;
+   if (entry->devcap) {
+      sws->get_cap(sws, entry->devcap, caps);
+
+      /* svga device supports SHADER_SAMPLE capability for these
+       * formats but does not advertise the devcap.
+       * So enable this bit here.
+       */
+      if (format == SVGA3D_R32_FLOAT_X8X24 ||
+          format == SVGA3D_R24_UNORM_X8) {
+         caps->u |= SVGA3D_DXFMT_SHADER_SAMPLE;
       }
+   }
 
-   } else {
-      /* Implicitly advertised format -- use default caps */
-      caps->value = entry->defaultOperations;
+   if (0) {
+      debug_printf("Format %s, devcap %s = 0x%x (%s)\n",
+                   svga_format_name(format),
+                   svga_devcap_name(entry->devcap),
+                   caps->u,
+                   svga_devcap_format_flags(caps->u));
    }
 }
 
@@ -2377,8 +2360,8 @@ svga_is_dx_format_supported(struct pipe_screen *screen,
 {
    struct svga_screen *ss = svga_screen(screen);
    SVGA3dSurfaceFormat svga_format;
-   SVGA3dSurfaceFormatCaps caps;
-   SVGA3dSurfaceFormatCaps mask;
+   SVGA3dDevCapResult caps;
+   unsigned int mask = 0;
 
    assert(bindings);
    assert(ss->sws->have_vgpu10);
@@ -2395,11 +2378,6 @@ svga_is_dx_format_supported(struct pipe_screen *screen,
       }
    }
 
-   svga_format = svga_translate_format(ss, format, bindings);
-   if (svga_format == SVGA3D_FORMAT_INVALID) {
-      return FALSE;
-   }
-
    /*
     * For VGPU10 vertex formats, skip querying host capabilities
     */
@@ -2411,6 +2389,11 @@ svga_is_dx_format_supported(struct pipe_screen *screen,
       return svga_format != SVGA3D_FORMAT_INVALID;
    }
 
+   svga_format = svga_translate_format(ss, format, bindings);
+   if (svga_format == SVGA3D_FORMAT_INVALID) {
+      return FALSE;
+   }
+
    /*
     * Override host capabilities, so that we end up with the same
     * visuals for all virtual hardware implementations.
@@ -2446,32 +2429,43 @@ svga_is_dx_format_supported(struct pipe_screen *screen,
    /*
     * Query the host capabilities.
     */
-   svga_get_format_cap(ss, svga_format, &caps);
+   svga_get_dx_format_cap(ss, svga_format, &caps);
 
    if (bindings & PIPE_BIND_RENDER_TARGET) {
       /* Check that the color surface is blendable, unless it's an
        * integer format.
        */
-      if (!svga_format_is_integer(svga_format) &&
-          (caps.value & SVGA3DFORMAT_OP_NOALPHABLEND)) {
+      if (!(svga_format_is_integer(svga_format) ||
+            (caps.u & SVGA3D_DXFMT_BLENDABLE))) {
          return FALSE;
       }
+      mask |= SVGA3D_DXFMT_COLOR_RENDERTARGET;
    }
 
-   mask.value = 0;
-   if (bindings & PIPE_BIND_RENDER_TARGET)
-      mask.value |= SVGA3DFORMAT_OP_OFFSCREEN_RENDERTARGET;
-
    if (bindings & PIPE_BIND_DEPTH_STENCIL)
-      mask.value |= SVGA3DFORMAT_OP_ZSTENCIL;
+      mask |= SVGA3D_DXFMT_DEPTH_RENDERTARGET;
 
-   if (bindings & PIPE_BIND_SAMPLER_VIEW)
-      mask.value |= SVGA3DFORMAT_OP_TEXTURE;
+   if (target == PIPE_TEXTURE_3D)
+      mask |= SVGA3D_DXFMT_VOLUME;
 
-   if (target == PIPE_TEXTURE_CUBE)
-      mask.value |= SVGA3DFORMAT_OP_CUBETEXTURE;
-   else if (target == PIPE_TEXTURE_3D)
-      mask.value |= SVGA3DFORMAT_OP_VOLUMETEXTURE;
+   /* Is the format supported for rendering */
+   if ((caps.u & mask) != mask)
+      return FALSE;
 
-   return (caps.value & mask.value) == mask.value;
+   if (bindings & PIPE_BIND_SAMPLER_VIEW) {
+      SVGA3dSurfaceFormat sampler_format;
+
+      /* Get the sampler view format */
+      sampler_format = svga_sampler_format(svga_format);
+      if (sampler_format != svga_format) {
+         caps.u = 0;
+         svga_get_dx_format_cap(ss, sampler_format, &caps);
+         mask &= (SVGA3D_DXFMT_VOLUME | SVGA3D_DXFMT_MULTISAMPLE);
+         mask |= SVGA3D_DXFMT_SHADER_SAMPLE;
+         if ((caps.u & mask) != mask)
+            return FALSE;
+      }
+   }
+
+   return TRUE;
 }