From 23c6eb035ba63d39652a10107f323d47b86b90f1 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Thu, 6 Oct 2011 16:52:36 -0600 Subject: mesa: fix software mipmap generation code for packed Z/stencil formats Fixes https://bugs.freedesktop.org/show_bug.cgi?id=32458 Reviewed-by: Chad Versace --- src/mesa/main/mipmap.c | 38 +++++++++++++++++++++++++++++++++++++- 1 file changed, 37 insertions(+), 1 deletion(-) (limited to 'src/mesa/main/mipmap.c') diff --git a/src/mesa/main/mipmap.c b/src/mesa/main/mipmap.c index f04a98b0337..46d71bb2218 100644 --- a/src/mesa/main/mipmap.c +++ b/src/mesa/main/mipmap.c @@ -43,7 +43,13 @@ static GLint bytes_per_pixel(GLenum datatype, GLuint comps) { - GLint b = _mesa_sizeof_packed_type(datatype); + GLint b; + + if (datatype == GL_UNSIGNED_INT_8_24_REV_MESA || + datatype == GL_UNSIGNED_INT_24_8_MESA) + return 4; + + b = _mesa_sizeof_packed_type(datatype); assert(b >= 0); if (_mesa_type_is_packed(datatype)) @@ -717,6 +723,36 @@ do_row(GLenum datatype, GLuint comps, GLint srcWidth, } } + else if (datatype == GL_UNSIGNED_INT_24_8_MESA && comps == 2) { + GLuint i, j, k; + const GLuint *rowA = (const GLuint *) srcRowA; + const GLuint *rowB = (const GLuint *) srcRowB; + GLuint *dst = (GLuint *) dstRow; + /* note: averaging stencil values seems weird, but what else? */ + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + GLuint z = (((rowA[j] >> 8) + (rowA[k] >> 8) + + (rowB[j] >> 8) + (rowB[k] >> 8)) / 4) << 8; + GLuint s = ((rowA[j] & 0xff) + (rowA[k] & 0xff) + + (rowB[j] & 0xff) + (rowB[k] & 0xff)) / 4; + dst[i] = z | s; + } + } + else if (datatype == GL_UNSIGNED_INT_8_24_REV_MESA && comps == 2) { + GLuint i, j, k; + const GLuint *rowA = (const GLuint *) srcRowA; + const GLuint *rowB = (const GLuint *) srcRowB; + GLuint *dst = (GLuint *) dstRow; + for (i = j = 0, k = k0; i < (GLuint) dstWidth; + i++, j += colStride, k += colStride) { + GLuint z = ((rowA[j] & 0xffffff) + (rowA[k] & 0xffffff) + + (rowB[j] & 0xffffff) + (rowB[k] & 0xffffff)) / 4; + GLuint s = (((rowA[j] >> 24) + (rowA[k] >> 24) + + (rowB[j] >> 24) + (rowB[k] >> 24)) / 4) << 24; + dst[i] = z | s; + } + } + else { _mesa_problem(NULL, "bad format in do_row()"); } -- cgit v1.2.3