diff options
Diffstat (limited to 'mesalib/src/mesa/main/mipmap.c')
| -rw-r--r-- | mesalib/src/mesa/main/mipmap.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/mesalib/src/mesa/main/mipmap.c b/mesalib/src/mesa/main/mipmap.c index f04a98b03..46d71bb22 100644 --- a/mesalib/src/mesa/main/mipmap.c +++ b/mesalib/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()"); } |