mesa: move more format helper functions to glformats.c

1 files changed, 365 insertions, 0 deletions

diff --git a/src/mesa/main/glformats.c b/src/mesa/main/glformats.c
index c28543cf008..8c20f7759d9 100644
--- a/src/mesa/main/glformats.c
+++ b/src/mesa/main/glformats.c
@@ -29,6 +29,285 @@
 
 
 /**
+ * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
+ */
+GLboolean
+_mesa_type_is_packed(GLenum type)
+{
+   switch (type) {
+   case GL_UNSIGNED_BYTE_3_3_2:
+   case GL_UNSIGNED_BYTE_2_3_3_REV:
+   case MESA_UNSIGNED_BYTE_4_4:
+   case GL_UNSIGNED_SHORT_5_6_5:
+   case GL_UNSIGNED_SHORT_5_6_5_REV:
+   case GL_UNSIGNED_SHORT_4_4_4_4:
+   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+   case GL_UNSIGNED_SHORT_5_5_5_1:
+   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+   case GL_UNSIGNED_INT_8_8_8_8:
+   case GL_UNSIGNED_INT_8_8_8_8_REV:
+   case GL_UNSIGNED_INT_10_10_10_2:
+   case GL_UNSIGNED_INT_2_10_10_10_REV:
+   case GL_UNSIGNED_SHORT_8_8_MESA:
+   case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+   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;
+   }
+
+   return GL_FALSE;
+}
+
+
+/**
+ * Get the size of a GL data type.
+ *
+ * \param type GL data type.
+ *
+ * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
+ * if an invalid type enum.
+ */
+GLint
+_mesa_sizeof_type(GLenum type)
+{
+   switch (type) {
+   case GL_BITMAP:
+      return 0;
+   case GL_UNSIGNED_BYTE:
+      return sizeof(GLubyte);
+   case GL_BYTE:
+      return sizeof(GLbyte);
+   case GL_UNSIGNED_SHORT:
+      return sizeof(GLushort);
+   case GL_SHORT:
+      return sizeof(GLshort);
+   case GL_UNSIGNED_INT:
+      return sizeof(GLuint);
+   case GL_INT:
+      return sizeof(GLint);
+   case GL_FLOAT:
+      return sizeof(GLfloat);
+   case GL_DOUBLE:
+      return sizeof(GLdouble);
+   case GL_HALF_FLOAT_ARB:
+      return sizeof(GLhalfARB);
+   case GL_FIXED:
+      return sizeof(GLfixed);
+   default:
+      return -1;
+   }
+}
+
+
+/**
+ * Same as _mesa_sizeof_type() but also accepting the packed pixel
+ * format data types.
+ */
+GLint
+_mesa_sizeof_packed_type(GLenum type)
+{
+   switch (type) {
+   case GL_BITMAP:
+      return 0;
+   case GL_UNSIGNED_BYTE:
+      return sizeof(GLubyte);
+   case GL_BYTE:
+      return sizeof(GLbyte);
+   case GL_UNSIGNED_SHORT:
+      return sizeof(GLushort);
+   case GL_SHORT:
+      return sizeof(GLshort);
+   case GL_UNSIGNED_INT:
+      return sizeof(GLuint);
+   case GL_INT:
+      return sizeof(GLint);
+   case GL_HALF_FLOAT_ARB:
+      return sizeof(GLhalfARB);
+   case GL_FLOAT:
+      return sizeof(GLfloat);
+   case GL_UNSIGNED_BYTE_3_3_2:
+   case GL_UNSIGNED_BYTE_2_3_3_REV:
+   case MESA_UNSIGNED_BYTE_4_4:
+      return sizeof(GLubyte);
+   case GL_UNSIGNED_SHORT_5_6_5:
+   case GL_UNSIGNED_SHORT_5_6_5_REV:
+   case GL_UNSIGNED_SHORT_4_4_4_4:
+   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+   case GL_UNSIGNED_SHORT_5_5_5_1:
+   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+   case GL_UNSIGNED_SHORT_8_8_MESA:
+   case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+      return sizeof(GLushort);
+   case GL_UNSIGNED_INT_8_8_8_8:
+   case GL_UNSIGNED_INT_8_8_8_8_REV:
+   case GL_UNSIGNED_INT_10_10_10_2:
+   case GL_UNSIGNED_INT_2_10_10_10_REV:
+   case GL_UNSIGNED_INT_24_8_EXT:
+   case GL_UNSIGNED_INT_5_9_9_9_REV:
+   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;
+   }
+}
+
+
+/**
+ * Get the number of components in a pixel format.
+ *
+ * \param format pixel format.
+ *
+ * \return the number of components in the given format, or -1 if a bad format.
+ */
+GLint
+_mesa_components_in_format(GLenum format)
+{
+   switch (format) {
+   case GL_COLOR_INDEX:
+   case GL_STENCIL_INDEX:
+   case GL_DEPTH_COMPONENT:
+   case GL_RED:
+   case GL_RED_INTEGER_EXT:
+   case GL_GREEN:
+   case GL_GREEN_INTEGER_EXT:
+   case GL_BLUE:
+   case GL_BLUE_INTEGER_EXT:
+   case GL_ALPHA:
+   case GL_ALPHA_INTEGER_EXT:
+   case GL_LUMINANCE:
+   case GL_LUMINANCE_INTEGER_EXT:
+   case GL_INTENSITY:
+      return 1;
+
+   case GL_LUMINANCE_ALPHA:
+   case GL_LUMINANCE_ALPHA_INTEGER_EXT:
+   case GL_RG:
+   case GL_YCBCR_MESA:
+   case GL_DEPTH_STENCIL_EXT:
+   case GL_DUDV_ATI:
+   case GL_DU8DV8_ATI:
+   case GL_RG_INTEGER:
+      return 2;
+
+   case GL_RGB:
+   case GL_BGR:
+   case GL_RGB_INTEGER_EXT:
+   case GL_BGR_INTEGER_EXT:
+      return 3;
+
+   case GL_RGBA:
+   case GL_BGRA:
+   case GL_ABGR_EXT:
+   case GL_RGBA_INTEGER_EXT:
+   case GL_BGRA_INTEGER_EXT:
+      return 4;
+
+   default:
+      return -1;
+   }
+}
+
+
+/**
+ * Get the bytes per pixel of pixel format type pair.
+ *
+ * \param format pixel format.
+ * \param type pixel type.
+ *
+ * \return bytes per pixel, or -1 if a bad format or type was given.
+ */
+GLint
+_mesa_bytes_per_pixel(GLenum format, GLenum type)
+{
+   GLint comps = _mesa_components_in_format(format);
+   if (comps < 0)
+      return -1;
+
+   switch (type) {
+   case GL_BITMAP:
+      return 0;  /* special case */
+   case GL_BYTE:
+   case GL_UNSIGNED_BYTE:
+      return comps * sizeof(GLubyte);
+   case GL_SHORT:
+   case GL_UNSIGNED_SHORT:
+      return comps * sizeof(GLshort);
+   case GL_INT:
+   case GL_UNSIGNED_INT:
+      return comps * sizeof(GLint);
+   case GL_FLOAT:
+      return comps * sizeof(GLfloat);
+   case GL_HALF_FLOAT_ARB:
+      return comps * sizeof(GLhalfARB);
+   case GL_UNSIGNED_BYTE_3_3_2:
+   case GL_UNSIGNED_BYTE_2_3_3_REV:
+      if (format == GL_RGB || format == GL_BGR ||
+          format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
+         return sizeof(GLubyte);
+      else
+         return -1;  /* error */
+   case GL_UNSIGNED_SHORT_5_6_5:
+   case GL_UNSIGNED_SHORT_5_6_5_REV:
+      if (format == GL_RGB || format == GL_BGR ||
+          format == GL_RGB_INTEGER_EXT || format == GL_BGR_INTEGER_EXT)
+         return sizeof(GLushort);
+      else
+         return -1;  /* error */
+   case GL_UNSIGNED_SHORT_4_4_4_4:
+   case GL_UNSIGNED_SHORT_4_4_4_4_REV:
+   case GL_UNSIGNED_SHORT_5_5_5_1:
+   case GL_UNSIGNED_SHORT_1_5_5_5_REV:
+      if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
+          format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
+         return sizeof(GLushort);
+      else
+         return -1;
+   case GL_UNSIGNED_INT_8_8_8_8:
+   case GL_UNSIGNED_INT_8_8_8_8_REV:
+   case GL_UNSIGNED_INT_10_10_10_2:
+   case GL_UNSIGNED_INT_2_10_10_10_REV:
+      if (format == GL_RGBA || format == GL_BGRA || format == GL_ABGR_EXT ||
+          format == GL_RGBA_INTEGER_EXT || format == GL_BGRA_INTEGER_EXT)
+         return sizeof(GLuint);
+      else
+         return -1;
+   case GL_UNSIGNED_SHORT_8_8_MESA:
+   case GL_UNSIGNED_SHORT_8_8_REV_MESA:
+      if (format == GL_YCBCR_MESA)
+         return sizeof(GLushort);
+      else
+         return -1;
+   case GL_UNSIGNED_INT_24_8_EXT:
+      if (format == GL_DEPTH_STENCIL_EXT)
+         return sizeof(GLuint);
+      else
+         return -1;
+   case GL_UNSIGNED_INT_5_9_9_9_REV:
+      if (format == GL_RGB)
+         return sizeof(GLuint);
+      else
+         return -1;
+   case GL_UNSIGNED_INT_10F_11F_11F_REV:
+      if (format == GL_RGB)
+         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;
+   }
+}
+
+
+/**
  * Test if the given format is an integer (non-normalized) format.
  */
 GLboolean
@@ -595,3 +874,89 @@ _mesa_base_format_to_integer_format(GLenum format)
    return format;
 }
 
+
+/**
+ * Does the given base texture/renderbuffer format have the channel
+ * named by 'pname'?
+ */
+GLboolean
+_mesa_base_format_has_channel(GLenum base_format, GLenum pname)
+{
+   switch (pname) {
+   case GL_TEXTURE_RED_SIZE:
+   case GL_TEXTURE_RED_TYPE:
+   case GL_RENDERBUFFER_RED_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
+      if (base_format == GL_RED ||
+	  base_format == GL_RG ||
+	  base_format == GL_RGB ||
+	  base_format == GL_RGBA) {
+	 return GL_TRUE;
+      }
+      return GL_FALSE;
+   case GL_TEXTURE_GREEN_SIZE:
+   case GL_TEXTURE_GREEN_TYPE:
+   case GL_RENDERBUFFER_GREEN_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
+      if (base_format == GL_RG ||
+	  base_format == GL_RGB ||
+	  base_format == GL_RGBA) {
+	 return GL_TRUE;
+      }
+      return GL_FALSE;
+   case GL_TEXTURE_BLUE_SIZE:
+   case GL_TEXTURE_BLUE_TYPE:
+   case GL_RENDERBUFFER_BLUE_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
+      if (base_format == GL_RGB ||
+	  base_format == GL_RGBA) {
+	 return GL_TRUE;
+      }
+      return GL_FALSE;
+   case GL_TEXTURE_ALPHA_SIZE:
+   case GL_TEXTURE_ALPHA_TYPE:
+   case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
+      if (base_format == GL_RGBA ||
+	  base_format == GL_ALPHA ||
+	  base_format == GL_LUMINANCE_ALPHA) {
+	 return GL_TRUE;
+      }
+      return GL_FALSE;
+   case GL_TEXTURE_LUMINANCE_SIZE:
+   case GL_TEXTURE_LUMINANCE_TYPE:
+      if (base_format == GL_LUMINANCE ||
+	  base_format == GL_LUMINANCE_ALPHA) {
+	 return GL_TRUE;
+      }
+      return GL_FALSE;
+   case GL_TEXTURE_INTENSITY_SIZE:
+   case GL_TEXTURE_INTENSITY_TYPE:
+      if (base_format == GL_INTENSITY) {
+	 return GL_TRUE;
+      }
+      return GL_FALSE;
+   case GL_TEXTURE_DEPTH_SIZE:
+   case GL_TEXTURE_DEPTH_TYPE:
+   case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
+      if (base_format == GL_DEPTH_STENCIL ||
+	  base_format == GL_DEPTH_COMPONENT) {
+	 return GL_TRUE;
+      }
+      return GL_FALSE;
+   case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
+   case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
+      if (base_format == GL_DEPTH_STENCIL ||
+	  base_format == GL_STENCIL_INDEX) {
+	 return GL_TRUE;
+      }
+      return GL_FALSE;
+   default:
+      _mesa_warning(NULL, "%s: Unexpected channel token 0x%x\n",
+		    __FUNCTION__, pname);
+      return GL_FALSE;
+   }
+
+   return GL_FALSE;
+}