+ },
+ {
+ MESA_FORMAT_R_UINT32,
+ "MESA_FORMAT_R_UINT32",
+ GL_RED,
+ GL_UNSIGNED_INT,
+ 32, 0, 0, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 4
+ },
+ {
+ MESA_FORMAT_RG_UINT32,
+ "MESA_FORMAT_RG_UINT32",
+ GL_RG,
+ GL_UNSIGNED_INT,
+ 32, 32, 0, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 8
+ },
+ {
+ MESA_FORMAT_RGB_UINT32,
+ "MESA_FORMAT_RGB_UINT32",
+ GL_RGB,
+ GL_UNSIGNED_INT,
+ 32, 32, 32, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 12
+ },
+ {
+ MESA_FORMAT_RGBA_UINT32,
+ "MESA_FORMAT_RGBA_UINT32",
+ GL_RGBA,
+ GL_UNSIGNED_INT,
+ 32, 32, 32, 32,
+ 0, 0, 0, 0, 0,
+ 1, 1, 16
+ },
+
+
+ {
+ MESA_FORMAT_DUDV8,
+ "MESA_FORMAT_DUDV8",
+ GL_DUDV_ATI,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 2
+ },
+
+ /* Signed 8 bits / channel */
+ {
+ MESA_FORMAT_SIGNED_R8, /* Name */
+ "MESA_FORMAT_SIGNED_R8", /* StrName */
+ GL_RED, /* BaseFormat */
+ GL_SIGNED_NORMALIZED, /* DataType */
+ 8, 0, 0, 0, /* Red/Green/Blue/AlphaBits */
+ 0, 0, 0, 0, 0, /* Lum/Int/Index/Depth/StencilBits */
+ 1, 1, 1 /* BlockWidth/Height,Bytes */
+ },
+ {
+ MESA_FORMAT_SIGNED_RG88_REV,
+ "MESA_FORMAT_SIGNED_RG88_REV",
+ GL_RG,
+ GL_SIGNED_NORMALIZED,
+ 8, 8, 0, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 2
+ },
+ {
+ MESA_FORMAT_SIGNED_RGBX8888,
+ "MESA_FORMAT_SIGNED_RGBX8888",
+ GL_RGB,
+ GL_SIGNED_NORMALIZED,
+ 8, 8, 8, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 4 /* 4 bpp, but no alpha */
+ },
+ {
+ MESA_FORMAT_SIGNED_RGBA8888,
+ "MESA_FORMAT_SIGNED_RGBA8888",
+ GL_RGBA,
+ GL_SIGNED_NORMALIZED,
+ 8, 8, 8, 8,
+ 0, 0, 0, 0, 0,
+ 1, 1, 4
+ },
+ {
+ MESA_FORMAT_SIGNED_RGBA8888_REV,
+ "MESA_FORMAT_SIGNED_RGBA8888_REV",
+ GL_RGBA,
+ GL_SIGNED_NORMALIZED,
+ 8, 8, 8, 8,
+ 0, 0, 0, 0, 0,
+ 1, 1, 4
+ },
+
+ /* Signed 16 bits / channel */
+ {
+ MESA_FORMAT_SIGNED_R16,
+ "MESA_FORMAT_SIGNED_R16",
+ GL_RED,
+ GL_SIGNED_NORMALIZED,
+ 16, 0, 0, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 2
+ },
+ {
+ MESA_FORMAT_SIGNED_GR1616,
+ "MESA_FORMAT_SIGNED_GR1616",
+ GL_RG,
+ GL_SIGNED_NORMALIZED,
+ 16, 16, 0, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 4
+ },
+ {
+ MESA_FORMAT_SIGNED_RGB_16,
+ "MESA_FORMAT_SIGNED_RGB_16",
+ GL_RGB,
+ GL_SIGNED_NORMALIZED,
+ 16, 16, 16, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 6
+ },
+ {
+ MESA_FORMAT_SIGNED_RGBA_16,
+ "MESA_FORMAT_SIGNED_RGBA_16",
+ GL_RGBA,
+ GL_SIGNED_NORMALIZED,
+ 16, 16, 16, 16,
+ 0, 0, 0, 0, 0,
+ 1, 1, 8
+ },
+ {
+ MESA_FORMAT_RGBA_16,
+ "MESA_FORMAT_RGBA_16",
+ GL_RGBA,
+ GL_UNSIGNED_NORMALIZED,
+ 16, 16, 16, 16,
+ 0, 0, 0, 0, 0,
+ 1, 1, 8
+ },
+ {
+ MESA_FORMAT_RED_RGTC1,
+ "MESA_FORMAT_RED_RGTC1",
+ GL_RED,
+ GL_UNSIGNED_NORMALIZED,
+ 8, 0, 0, 0,
+ 0, 0, 0, 0, 0,
+ 4, 4, 8 /* 8 bytes per 4x4 block */
+ },
+ {
+ MESA_FORMAT_SIGNED_RED_RGTC1,
+ "MESA_FORMAT_SIGNED_RED_RGTC1",
+ GL_RED,
+ GL_SIGNED_NORMALIZED,
+ 8, 0, 0, 0,
+ 0, 0, 0, 0, 0,
+ 4, 4, 8 /* 8 bytes per 4x4 block */
+ },
+ {
+ MESA_FORMAT_RG_RGTC2,
+ "MESA_FORMAT_RG_RGTC2",
+ GL_RG,
+ GL_UNSIGNED_NORMALIZED,
+ 8, 8, 0, 0,
+ 0, 0, 0, 0, 0,
+ 4, 4, 16 /* 16 bytes per 4x4 block */
+ },
+ {
+ MESA_FORMAT_SIGNED_RG_RGTC2,
+ "MESA_FORMAT_SIGNED_RG_RGTC2",
+ GL_RG,
+ GL_SIGNED_NORMALIZED,
+ 8, 8, 0, 0,
+ 0, 0, 0, 0, 0,
+ 4, 4, 16 /* 16 bytes per 4x4 block */
+ },
+ {
+ MESA_FORMAT_L_LATC1,
+ "MESA_FORMAT_L_LATC1",
+ GL_LUMINANCE,
+ GL_UNSIGNED_NORMALIZED,
+ 0, 0, 0, 0,
+ 4, 0, 0, 0, 0,
+ 4, 4, 8 /* 8 bytes per 4x4 block */
+ },
+ {
+ MESA_FORMAT_SIGNED_L_LATC1,
+ "MESA_FORMAT_SIGNED_L_LATC1",
+ GL_LUMINANCE,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 0,
+ 4, 0, 0, 0, 0,
+ 4, 4, 8 /* 8 bytes per 4x4 block */
+ },
+ {
+ MESA_FORMAT_LA_LATC2,
+ "MESA_FORMAT_LA_LATC2",
+ GL_LUMINANCE_ALPHA,
+ GL_UNSIGNED_NORMALIZED,
+ 0, 0, 0, 4,
+ 4, 0, 0, 0, 0,
+ 4, 4, 16 /* 16 bytes per 4x4 block */
+ },
+ {
+ MESA_FORMAT_SIGNED_LA_LATC2,
+ "MESA_FORMAT_SIGNED_LA_LATC2",
+ GL_LUMINANCE_ALPHA,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 4,
+ 4, 0, 0, 0, 0,
+ 4, 4, 16 /* 16 bytes per 4x4 block */
+ },
+
+ {
+ MESA_FORMAT_ETC1_RGB8,
+ "MESA_FORMAT_ETC1_RGB8",
+ GL_RGB,
+ GL_UNSIGNED_NORMALIZED,
+ 8, 8, 8, 0,
+ 0, 0, 0, 0, 0,
+ 4, 4, 8 /* 8 bytes per 4x4 block */
+ },
+
+ /* Signed formats from EXT_texture_snorm that are not in GL3.1 */
+ {
+ MESA_FORMAT_SIGNED_A8,
+ "MESA_FORMAT_SIGNED_A8",
+ GL_ALPHA,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 8,
+ 0, 0, 0, 0, 0,
+ 1, 1, 1
+ },
+ {
+ MESA_FORMAT_SIGNED_L8,
+ "MESA_FORMAT_SIGNED_L8",
+ GL_LUMINANCE,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 0,
+ 8, 0, 0, 0, 0,
+ 1, 1, 1
+ },
+ {
+ MESA_FORMAT_SIGNED_AL88,
+ "MESA_FORMAT_SIGNED_AL88",
+ GL_LUMINANCE_ALPHA,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 8,
+ 8, 0, 0, 0, 0,
+ 1, 1, 2
+ },
+ {
+ MESA_FORMAT_SIGNED_I8,
+ "MESA_FORMAT_SIGNED_I8",
+ GL_INTENSITY,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 0,
+ 0, 8, 0, 0, 0,
+ 1, 1, 1
+ },
+ {
+ MESA_FORMAT_SIGNED_A16,
+ "MESA_FORMAT_SIGNED_A16",
+ GL_ALPHA,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 16,
+ 0, 0, 0, 0, 0,
+ 1, 1, 2
+ },
+ {
+ MESA_FORMAT_SIGNED_L16,
+ "MESA_FORMAT_SIGNED_L16",
+ GL_LUMINANCE,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 0,
+ 16, 0, 0, 0, 0,
+ 1, 1, 2
+ },
+ {
+ MESA_FORMAT_SIGNED_AL1616,
+ "MESA_FORMAT_SIGNED_AL1616",
+ GL_LUMINANCE_ALPHA,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 16,
+ 16, 0, 0, 0, 0,
+ 1, 1, 4
+ },
+ {
+ MESA_FORMAT_SIGNED_I16,
+ "MESA_FORMAT_SIGNED_I16",
+ GL_INTENSITY,
+ GL_SIGNED_NORMALIZED,
+ 0, 0, 0, 0,
+ 0, 16, 0, 0, 0,
+ 1, 1, 2
+ },
+ {
+ MESA_FORMAT_RGB9_E5_FLOAT,
+ "MESA_FORMAT_RGB9_E5",
+ GL_RGB,
+ GL_FLOAT,
+ 9, 9, 9, 0,
+ 0, 0, 0, 0, 0,
+ 1, 1, 4
+ },
+ {
+ MESA_FORMAT_R11_G11_B10_FLOAT,
+ "MESA_FORMAT_R11_G11_B10_FLOAT",
+ GL_RGB,
+ GL_FLOAT,
+ 11, 11, 10, 0,
+ 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 */
+ /* DataType here is used to answer GL_TEXTURE_DEPTH_TYPE queries, and is
+ * never used for stencil because stencil is always GL_UNSIGNED_INT.
+ */
+ GL_FLOAT, /* 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 */
+ },
+ {
+ MESA_FORMAT_ARGB2101010_UINT,
+ "MESA_FORMAT_ARGB2101010_UINT",
+ GL_RGBA,
+ GL_UNSIGNED_INT,
+ 10, 10, 10, 2,
+ 0, 0, 0, 0, 0,
+ 1, 1, 4
+ },
+ {
+ MESA_FORMAT_ABGR2101010_UINT,
+ "MESA_FORMAT_ABGR2101010_UINT",
+ GL_RGBA,
+ GL_UNSIGNED_INT,
+ 10, 10, 10, 2,
+ 0, 0, 0, 0, 0,
+ 1, 1, 4
+ },
+};
+
+
+
+static const struct gl_format_info *
+_mesa_get_format_info(gl_format format)
+{
+ const struct gl_format_info *info = &format_info[format];
+ assert(info->Name == format);
+ return info;
+}
+
+
+/** Return string name of format (for debugging) */
+const char *
+_mesa_get_format_name(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ return info->StrName;
+}
+
+
+
+/**
+ * Return bytes needed to store a block of pixels in the given format.
+ * Normally, a block is 1x1 (a single pixel). But for compressed formats
+ * a block may be 4x4 or 8x4, etc.
+ *
+ * Note: not GLuint, so as not to coerce math to unsigned. cf. fdo #37351
+ */
+GLint
+_mesa_get_format_bytes(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ ASSERT(info->BytesPerBlock);
+ ASSERT(info->BytesPerBlock <= MAX_PIXEL_BYTES ||
+ _mesa_is_format_compressed(format));
+ return info->BytesPerBlock;
+}
+
+
+/**
+ * Return bits per component for the given format.
+ * \param format one of MESA_FORMAT_x
+ * \param pname the component, such as GL_RED_BITS, GL_TEXTURE_BLUE_BITS, etc.
+ */
+GLint
+_mesa_get_format_bits(gl_format format, GLenum pname)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+
+ switch (pname) {
+ case GL_RED_BITS:
+ case GL_TEXTURE_RED_SIZE:
+ case GL_RENDERBUFFER_RED_SIZE_EXT:
+ case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
+ return info->RedBits;
+ case GL_GREEN_BITS:
+ case GL_TEXTURE_GREEN_SIZE:
+ case GL_RENDERBUFFER_GREEN_SIZE_EXT:
+ case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
+ return info->GreenBits;
+ case GL_BLUE_BITS:
+ case GL_TEXTURE_BLUE_SIZE:
+ case GL_RENDERBUFFER_BLUE_SIZE_EXT:
+ case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
+ return info->BlueBits;
+ case GL_ALPHA_BITS:
+ case GL_TEXTURE_ALPHA_SIZE:
+ case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
+ case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
+ return info->AlphaBits;
+ case GL_TEXTURE_INTENSITY_SIZE:
+ return info->IntensityBits;
+ case GL_TEXTURE_LUMINANCE_SIZE:
+ return info->LuminanceBits;
+ case GL_INDEX_BITS:
+ return info->IndexBits;
+ case GL_DEPTH_BITS:
+ case GL_TEXTURE_DEPTH_SIZE_ARB:
+ case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
+ case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
+ return info->DepthBits;
+ case GL_STENCIL_BITS:
+ case GL_TEXTURE_STENCIL_SIZE_EXT:
+ case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
+ case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
+ return info->StencilBits;
+ default:
+ _mesa_problem(NULL, "bad pname in _mesa_get_format_bits()");
+ return 0;
+ }
+}
+
+
+GLuint
+_mesa_get_format_max_bits(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ GLuint max = MAX2(info->RedBits, info->GreenBits);
+ max = MAX2(max, info->BlueBits);
+ max = MAX2(max, info->AlphaBits);
+ max = MAX2(max, info->LuminanceBits);
+ max = MAX2(max, info->IntensityBits);
+ max = MAX2(max, info->DepthBits);
+ max = MAX2(max, info->StencilBits);
+ return max;
+}
+
+
+/**
+ * Return the data type (or more specifically, the data representation)
+ * for the given format.
+ * The return value will be one of:
+ * GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
+ * GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
+ * GL_UNSIGNED_INT = an ordinary unsigned integer
+ * GL_INT = an ordinary signed integer
+ * GL_FLOAT = an ordinary float
+ */
+GLenum
+_mesa_get_format_datatype(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ return info->DataType;
+}
+
+
+/**
+ * Return the basic format for the given type. The result will be one of
+ * GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY,
+ * GL_YCBCR_MESA, GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
+ */
+GLenum
+_mesa_get_format_base_format(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ return info->BaseFormat;
+}
+
+
+/**
+ * Return the block size (in pixels) for the given format. Normally
+ * the block size is 1x1. But compressed formats will have block sizes
+ * of 4x4 or 8x4 pixels, etc.
+ * \param bw returns block width in pixels
+ * \param bh returns block height in pixels
+ */
+void
+_mesa_get_format_block_size(gl_format format, GLuint *bw, GLuint *bh)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ *bw = info->BlockWidth;
+ *bh = info->BlockHeight;
+}
+
+
+/** Is the given format a compressed format? */
+GLboolean
+_mesa_is_format_compressed(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ return info->BlockWidth > 1 || info->BlockHeight > 1;
+}
+
+
+/**
+ * Determine if the given format represents a packed depth/stencil buffer.
+ */
+GLboolean
+_mesa_is_format_packed_depth_stencil(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+
+ return info->BaseFormat == GL_DEPTH_STENCIL;
+}
+
+
+/**
+ * Is the given format a signed/unsigned integer color format?
+ */
+GLboolean
+_mesa_is_format_integer_color(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT) &&
+ info->BaseFormat != GL_DEPTH_COMPONENT &&
+ info->BaseFormat != GL_DEPTH_STENCIL &&
+ info->BaseFormat != GL_STENCIL_INDEX;
+}
+
+
+/**
+ * Is the given format an unsigned integer format?
+ */
+GLboolean
+_mesa_is_format_unsigned(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ return _mesa_is_type_unsigned(info->DataType);
+}
+
+
+/**
+ * Return color encoding for given format.
+ * \return GL_LINEAR or GL_SRGB
+ */
+GLenum
+_mesa_get_format_color_encoding(gl_format format)
+{
+ /* XXX this info should be encoded in gl_format_info */
+ switch (format) {
+ case MESA_FORMAT_SRGB8:
+ case MESA_FORMAT_SRGBA8:
+ case MESA_FORMAT_SARGB8:
+ case MESA_FORMAT_SL8:
+ case MESA_FORMAT_SLA8:
+ case MESA_FORMAT_SRGB_DXT1:
+ case MESA_FORMAT_SRGBA_DXT1:
+ case MESA_FORMAT_SRGBA_DXT3:
+ case MESA_FORMAT_SRGBA_DXT5:
+ return GL_SRGB;
+ default:
+ return GL_LINEAR;
+ }
+}
+
+
+/**
+ * For an sRGB format, return the corresponding linear color space format.
+ * For non-sRGB formats, return the format as-is.
+ */
+gl_format
+_mesa_get_srgb_format_linear(gl_format format)
+{
+ switch (format) {
+ case MESA_FORMAT_SRGB8:
+ format = MESA_FORMAT_RGB888;
+ break;
+ case MESA_FORMAT_SRGBA8:
+ format = MESA_FORMAT_RGBA8888;
+ break;
+ case MESA_FORMAT_SARGB8:
+ format = MESA_FORMAT_ARGB8888;
+ break;
+ case MESA_FORMAT_SL8:
+ format = MESA_FORMAT_L8;
+ break;
+ case MESA_FORMAT_SLA8:
+ format = MESA_FORMAT_AL88;
+ break;
+ case MESA_FORMAT_SRGB_DXT1:
+ format = MESA_FORMAT_RGB_DXT1;
+ break;
+ case MESA_FORMAT_SRGBA_DXT1:
+ format = MESA_FORMAT_RGBA_DXT1;
+ break;
+ case MESA_FORMAT_SRGBA_DXT3:
+ format = MESA_FORMAT_RGBA_DXT3;
+ break;
+ case MESA_FORMAT_SRGBA_DXT5:
+ format = MESA_FORMAT_RGBA_DXT5;
+ break;
+ default:
+ break;
+ }
+ return format;
+}
+
+
+/**
+ * If the given format is a compressed format, return a corresponding
+ * uncompressed format.
+ */
+gl_format
+_mesa_get_uncompressed_format(gl_format format)
+{
+ switch (format) {
+ case MESA_FORMAT_RGB_FXT1:
+ return MESA_FORMAT_RGB888;
+ case MESA_FORMAT_RGBA_FXT1:
+ return MESA_FORMAT_RGBA8888;
+ case MESA_FORMAT_RGB_DXT1:
+ case MESA_FORMAT_SRGB_DXT1:
+ return MESA_FORMAT_RGB888;
+ case MESA_FORMAT_RGBA_DXT1:
+ case MESA_FORMAT_SRGBA_DXT1:
+ return MESA_FORMAT_RGBA8888;
+ case MESA_FORMAT_RGBA_DXT3:
+ case MESA_FORMAT_SRGBA_DXT3:
+ return MESA_FORMAT_RGBA8888;
+ case MESA_FORMAT_RGBA_DXT5:
+ case MESA_FORMAT_SRGBA_DXT5:
+ return MESA_FORMAT_RGBA8888;
+ case MESA_FORMAT_RED_RGTC1:
+ return MESA_FORMAT_R8;
+ case MESA_FORMAT_SIGNED_RED_RGTC1:
+ return MESA_FORMAT_SIGNED_R8;
+ case MESA_FORMAT_RG_RGTC2:
+ return MESA_FORMAT_GR88;
+ case MESA_FORMAT_SIGNED_RG_RGTC2:
+ return MESA_FORMAT_SIGNED_RG88_REV;
+ case MESA_FORMAT_L_LATC1:
+ return MESA_FORMAT_L8;
+ case MESA_FORMAT_SIGNED_L_LATC1:
+ return MESA_FORMAT_SIGNED_L8;
+ case MESA_FORMAT_LA_LATC2:
+ return MESA_FORMAT_AL88;
+ case MESA_FORMAT_SIGNED_LA_LATC2:
+ return MESA_FORMAT_SIGNED_AL88;
+ case MESA_FORMAT_ETC1_RGB8:
+ return MESA_FORMAT_RGB888;
+ default:
+#ifdef DEBUG
+ assert(!_mesa_is_format_compressed(format));
+#endif
+ return format;
+ }
+}
+
+
+GLuint
+_mesa_format_num_components(gl_format format)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ return ((info->RedBits > 0) +
+ (info->GreenBits > 0) +
+ (info->BlueBits > 0) +
+ (info->AlphaBits > 0) +
+ (info->LuminanceBits > 0) +
+ (info->IntensityBits > 0) +
+ (info->DepthBits > 0) +
+ (info->StencilBits > 0));
+}
+
+
+/**
+ * Return number of bytes needed to store an image of the given size
+ * in the given format.
+ */
+GLuint
+_mesa_format_image_size(gl_format format, GLsizei width,
+ GLsizei height, GLsizei depth)
+{
+ const struct gl_format_info *info = _mesa_get_format_info(format);
+ /* Strictly speaking, a conditional isn't needed here */
+ if (info->BlockWidth > 1 || info->BlockHeight > 1) {
+ /* compressed format (2D only for now) */
+ const GLuint bw = info->BlockWidth, bh = info->BlockHeight;
+ const GLuint wblocks = (width + bw - 1) / bw;
+ const GLuint hblocks = (height + bh - 1) / bh;
+ const GLuint sz = wblocks * hblocks * info->BytesPerBlock;
+ return sz * depth;