diff options
| -rw-r--r-- | src/mesa/main/formats.c | 30 | ||||
| -rw-r--r-- | src/mesa/main/formats.h | 4 |
2 files changed, 34 insertions, 0 deletions
diff --git a/src/mesa/main/formats.c b/src/mesa/main/formats.c index f689d99df8..cd9eb81852 100644 --- a/src/mesa/main/formats.c +++ b/src/mesa/main/formats.c @@ -1073,6 +1073,36 @@ _mesa_format_image_size(gl_format format, GLsizei width, } +/** + * Same as _mesa_format_image_size() but returns a 64-bit value to + * accomodate very large textures. + */ +uint64_t +_mesa_format_image_size64(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 uint64_t bw = info->BlockWidth, bh = info->BlockHeight; + const uint64_t wblocks = (width + bw - 1) / bw; + const uint64_t hblocks = (height + bh - 1) / bh; + const uint64_t sz = wblocks * hblocks * info->BytesPerBlock; + assert(depth == 1); + return sz; + } + else { + /* non-compressed */ + const uint64_t sz = ((uint64_t) width * + (uint64_t) height * + (uint64_t) depth * + info->BytesPerBlock); + return sz; + } +} + + GLint _mesa_format_row_stride(gl_format format, GLsizei width) diff --git a/src/mesa/main/formats.h b/src/mesa/main/formats.h index eeb460dabe..997229bf9f 100644 --- a/src/mesa/main/formats.h +++ b/src/mesa/main/formats.h @@ -209,6 +209,10 @@ extern GLuint _mesa_format_image_size(gl_format format, GLsizei width, GLsizei height, GLsizei depth); +extern uint64_t +_mesa_format_image_size64(gl_format format, GLsizei width, + GLsizei height, GLsizei depth); + extern GLint _mesa_format_row_stride(gl_format format, GLsizei width); |