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mesa/formatquery: Added compressed texture related queries

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From the ARB_internalformat_query2 specification:

   "- TEXTURE_COMPRESSED: If <internalformat> is a compressed format
      that is supported for this type of resource, TRUE is returned in
      <params>. If the internal format is not compressed, or the type of
      resource is not supported, FALSE is returned.

    - TEXTURE_COMPRESSED_BLOCK_WIDTH: If the resource contains a compressed
      format, the width of a compressed block (in bytes) is returned in
      <params>. If the internal format is not compressed, or the resource
      is not supported, 0 is returned.

    - TEXTURE_COMPRESSED_BLOCK_HEIGHT: If the resource contains a compressed
      format, the height of a compressed block (in bytes) is returned in
      <params>. If the internal format is not compressed, or the resource
      is not supported, 0 is returned.

    - TEXTURE_COMPRESSED_BLOCK_SIZE: If the resource contains a compressed
      format the number of bytes per block is returned in <params>.  If the
      internal format is not compressed, or the resource is not supported,
      0 is returned.
      (combined with the above, allows the bitrate to be computed, and may be
      useful in conjunction with ARB_compressed_texture_pixel_storage)."

Reviewed-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Antia Puentes
2015-12-19 20:23:29 +01:00
committed by Eduardo Lima Mitev
parent 467f462c75
commit aed633bb97
1 changed files with 27 additions and 8 deletions
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35
src/mesa/main/formatquery.c
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@@ -34,6 +34,7 @@
#include "get.h"
#include "genmipmap.h"
#include "shaderimage.h"
#include "texcompress.h"
static bool
_is_renderable(struct gl_context *ctx, GLenum internalformat)
@@ -1332,20 +1333,38 @@ _mesa_GetInternalformativ(GLenum target, GLenum internalformat, GLenum pname,
break;
case GL_TEXTURE_COMPRESSED:
/* @TODO */
buffer[0] = _mesa_is_compressed_format(ctx, internalformat);
break;
case GL_TEXTURE_COMPRESSED_BLOCK_WIDTH:
/* @TODO */
break;
case GL_TEXTURE_COMPRESSED_BLOCK_HEIGHT:
/* @TODO */
break;
case GL_TEXTURE_COMPRESSED_BLOCK_SIZE: {
mesa_format mesaformat;
GLint block_size;
case GL_TEXTURE_COMPRESSED_BLOCK_SIZE:
/* @TODO */
mesaformat = _mesa_glenum_to_compressed_format(internalformat);
if (mesaformat == MESA_FORMAT_NONE)
goto end;
block_size = _mesa_get_format_bytes(mesaformat);
assert(block_size > 0);
if (pname == GL_TEXTURE_COMPRESSED_BLOCK_SIZE) {
buffer[0] = block_size;
} else {
GLuint bwidth, bheight;
/* Returns the width and height in pixels. We return bytes */
_mesa_get_format_block_size(mesaformat, &bwidth, &bheight);
assert(bwidth > 0 && bheight > 0);
if (pname == GL_TEXTURE_COMPRESSED_BLOCK_WIDTH)
buffer[0] = block_size / bheight;
else
buffer[0] = block_size / bwidth;
}
break;
}
case GL_CLEAR_BUFFER:
/* @TODO */