mesa: initial ARB_depth_buffer_float support

Using GL_NONE as DataType of Z32_FLOAT_X24S8, not sure what I should put there.
The spec says the type is n/a.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/mesa/main/fbobject.c

@@ -1131,6 +1131,16 @@ _mesa_base_fbo_format(struct gl_context *ctx, GLenum internalFormat)
          return GL_DEPTH_STENCIL_EXT;
       else
          return 0;
+   case GL_DEPTH_COMPONENT32F:
+      if (ctx->Extensions.ARB_depth_buffer_float)
+         return GL_DEPTH_COMPONENT;
+      else
+         return 0;
+   case GL_DEPTH32F_STENCIL8:
+      if (ctx->Extensions.ARB_depth_buffer_float)
+         return GL_DEPTH_STENCIL;
+      else
+         return 0;
    case GL_RED:
    case GL_R8:
    case GL_R16:
@@ -2266,6 +2276,15 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
             /* special cases */
             *params = GL_INDEX;
          }
+         else if (format == MESA_FORMAT_Z32_FLOAT_X24S8) {
+            /* depends on the attachment parameter */
+            if (attachment == GL_STENCIL_ATTACHMENT) {
+               *params = GL_INDEX;
+            }
+            else {
+               *params = GL_FLOAT;
+            }
+         }
          else {
             *params = _mesa_get_format_datatype(format);
          }

src/mesa/main/formats.c

@@ -1091,6 +1091,25 @@ static struct gl_format_info format_info[MESA_FORMAT_COUNT] =
       0, 0, 0, 0, 0,
       1, 1, 4
    },
+   /* ARB_depth_buffer_float */
+   {
+      MESA_FORMAT_Z32_FLOAT,       /* Name */
+      "MESA_FORMAT_Z32_FLOAT",     /* StrName */
+      GL_DEPTH_COMPONENT,          /* BaseFormat */
+      GL_FLOAT,                    /* DataType */
+      0, 0, 0, 0,                  /* Red/Green/Blue/AlphaBits */
+      0, 0, 0, 32, 0,              /* Lum/Int/Index/Depth/StencilBits */
+      1, 1, 4                      /* BlockWidth/Height,Bytes */
+   },
+   {
+      MESA_FORMAT_Z32_FLOAT_X24S8, /* Name */
+      "MESA_FORMAT_Z32_FLOAT_X24S8", /* StrName */
+      GL_DEPTH_STENCIL,            /* BaseFormat */
+      GL_NONE /* XXX */,           /* DataType */
+      0, 0, 0, 0,                  /* Red/Green/Blue/AlphaBits */
+      0, 0, 0, 32, 8,              /* Lum/Int/Index/Depth/StencilBits */
+      1, 1, 8                      /* BlockWidth/Height,Bytes */
+   },
 };
 
 
@@ -1654,6 +1673,16 @@ _mesa_format_to_type_and_comps(gl_format format,
       *comps = 1;
       return;
 
+   case MESA_FORMAT_Z32_FLOAT:
+      *datatype = GL_FLOAT;
+      *comps = 1;
+      return;
+
+   case MESA_FORMAT_Z32_FLOAT_X24S8:
+      *datatype = GL_FLOAT_32_UNSIGNED_INT_24_8_REV;
+      *comps = 1;
+      return;
+
    case MESA_FORMAT_DUDV8:
       *datatype = GL_BYTE;
       *comps = 2;

src/mesa/main/formats.h

@@ -209,6 +209,9 @@ typedef enum
    MESA_FORMAT_RGB9_E5_FLOAT,
    MESA_FORMAT_R11_G11_B10_FLOAT,
 
+   MESA_FORMAT_Z32_FLOAT,
+   MESA_FORMAT_Z32_FLOAT_X24S8,
+
    MESA_FORMAT_COUNT
 } gl_format;
 

src/mesa/main/image.c

@@ -84,6 +84,7 @@ _mesa_type_is_packed(GLenum type)
    case GL_UNSIGNED_INT_24_8_EXT:
    case GL_UNSIGNED_INT_5_9_9_9_REV:
    case GL_UNSIGNED_INT_10F_11F_11F_REV:
+   case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
       return GL_TRUE;
    }
 
@@ -228,6 +229,8 @@ _mesa_sizeof_packed_type( GLenum type )
          return sizeof(GLuint);
       case GL_UNSIGNED_INT_10F_11F_11F_REV:
          return sizeof(GLuint);
+      case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
+         return 8;
       default:
          return -1;
    }
@@ -379,6 +382,11 @@ _mesa_bytes_per_pixel( GLenum format, GLenum type )
             return sizeof(GLuint);
          else
             return -1;
+      case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
+         if (format == GL_DEPTH_STENCIL)
+            return 8;
+         else
+            return -1;
       default:
          return -1;
    }
@@ -531,8 +539,10 @@ _mesa_is_legal_format_and_type(const struct gl_context *ctx,
          else
             return GL_FALSE;
       case GL_DEPTH_STENCIL_EXT:
-         if (ctx->Extensions.EXT_packed_depth_stencil
+         if ((ctx->Extensions.EXT_packed_depth_stencil &&
-             && type == GL_UNSIGNED_INT_24_8_EXT)
+              type == GL_UNSIGNED_INT_24_8_EXT) ||
+             (ctx->Extensions.ARB_depth_buffer_float &&
+              type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV))
             return GL_TRUE;
          else
             return GL_FALSE;
@@ -884,6 +894,7 @@ _mesa_is_depth_format(GLenum format)
       case GL_DEPTH_COMPONENT16:
       case GL_DEPTH_COMPONENT24:
       case GL_DEPTH_COMPONENT32:
+      case GL_DEPTH_COMPONENT32F:
          return GL_TRUE;
       default:
          return GL_FALSE;
@@ -931,6 +942,7 @@ _mesa_is_depthstencil_format(GLenum format)
    switch (format) {
       case GL_DEPTH24_STENCIL8_EXT:
       case GL_DEPTH_STENCIL_EXT:
+      case GL_DEPTH32F_STENCIL8:
          return GL_TRUE;
       default:
          return GL_FALSE;
@@ -956,6 +968,8 @@ _mesa_is_depth_or_stencil_format(GLenum format)
       case GL_STENCIL_INDEX16_EXT:
       case GL_DEPTH_STENCIL_EXT:
       case GL_DEPTH24_STENCIL8_EXT:
+      case GL_DEPTH_COMPONENT32F:
+      case GL_DEPTH32F_STENCIL8:
          return GL_TRUE;
       default:
          return GL_FALSE;

src/mesa/main/readpix.c

@@ -61,6 +61,14 @@ _mesa_error_check_format_type(struct gl_context *ctx, GLenum format,
       return GL_TRUE;
    }
 
+   if (ctx->Extensions.ARB_depth_buffer_float
+       && type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV
+       && format != GL_DEPTH_STENCIL_EXT) {
+      _mesa_error(ctx, GL_INVALID_OPERATION,
+                  "gl%sPixels(format is not GL_DEPTH_STENCIL_EXT)", readDraw);
+      return GL_TRUE;
+   }
+
    /* basic combinations test */
    if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
       _mesa_error(ctx, GL_INVALID_ENUM,
@@ -142,8 +150,21 @@ _mesa_error_check_format_type(struct gl_context *ctx, GLenum format,
       }
       break;
    case GL_DEPTH_STENCIL_EXT:
-      if (!ctx->Extensions.EXT_packed_depth_stencil ||
+      /* Check validity of the type first. */
-          type != GL_UNSIGNED_INT_24_8_EXT) {
+      switch (type) {
+         case GL_UNSIGNED_INT_24_8_EXT:
+            if (!ctx->Extensions.EXT_packed_depth_stencil) {
+               _mesa_error(ctx, GL_INVALID_ENUM, "gl%sPixels(type)", readDraw);
+               return GL_TRUE;
+            }
+            break;
+         case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
+            if (!ctx->Extensions.ARB_depth_buffer_float) {
+               _mesa_error(ctx, GL_INVALID_ENUM, "gl%sPixels(type)", readDraw);
+               return GL_TRUE;
+            }
+            break;
+         default:
             _mesa_error(ctx, GL_INVALID_ENUM, "gl%sPixels(type)", readDraw);
             return GL_TRUE;
       }

src/mesa/main/renderbuffer.c

@@ -66,6 +66,9 @@ get_datatype_bytes(struct gl_renderbuffer *rb)
    int component_size;
 
    switch (rb->DataType) {
+   case GL_FLOAT_32_UNSIGNED_INT_24_8_REV:
+      component_size = 8;
+      break;
    case GL_FLOAT:
    case GL_UNSIGNED_INT:
    case GL_UNSIGNED_INT_24_8_EXT:

src/mesa/main/texfetch.c

@@ -913,6 +913,20 @@ texfetch_funcs[MESA_FORMAT_COUNT] =
       fetch_texel_2d_r11_g11_b10f,
       fetch_texel_3d_r11_g11_b10f,
       store_texel_r11_g11_b10f
+   },
+   {
+      MESA_FORMAT_Z32_FLOAT,
+      NULL, /* XXX */
+      NULL,
+      NULL,
+      NULL
+   },
+   {
+      MESA_FORMAT_Z32_FLOAT_X24S8,
+      NULL, /* XXX */
+      NULL,
+      NULL,
+      NULL
    }
 };
 

src/mesa/main/texformat.c

@@ -416,6 +416,19 @@ _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
       }
    }
 
+   if (ctx->Extensions.ARB_depth_buffer_float) {
+      switch (internalFormat) {
+         case GL_DEPTH_COMPONENT32F:
+            ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT]);
+            return MESA_FORMAT_Z32_FLOAT;
+         case GL_DEPTH32F_STENCIL8:
+            ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT_X24S8]);
+            return MESA_FORMAT_Z32_FLOAT_X24S8;
+         default:
+            ; /* fallthrough */
+      }
+   }
+
    if (ctx->Extensions.ATI_envmap_bumpmap) {
       switch (internalFormat) {
          case GL_DUDV_ATI:

src/mesa/main/texstore.c

@@ -4419,6 +4419,9 @@ texstore_funcs[MESA_FORMAT_COUNT] =
 
    { MESA_FORMAT_RGB9_E5_FLOAT, _mesa_texstore_rgb9_e5 },
    { MESA_FORMAT_R11_G11_B10_FLOAT, _mesa_texstore_r11_g11_b10f },
+
+   { MESA_FORMAT_Z32_FLOAT, NULL /* XXX */ },
+   { MESA_FORMAT_Z32_FLOAT_X24S8, /* XXX */ },
 };