From 4a8f93baded2cc56b1154d4c2c3d8d696441bd38 Mon Sep 17 00:00:00 2001 From: Henri Verbeet Date: Mon, 1 Feb 2010 13:52:56 +0100 Subject: [PATCH] wined3d: Handle a zero source value for WINED3DSIH_LOG. --- dlls/wined3d/glsl_shader.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c index e548aca5465..fd359b52a84 100644 --- a/dlls/wined3d/glsl_shader.c +++ b/dlls/wined3d/glsl_shader.c @@ -2105,10 +2105,15 @@ static void shader_glsl_log(const struct wined3d_shader_instruction *ins) shader_glsl_add_src_param(ins, &ins->src[0], WINED3DSP_WRITEMASK_0, &src0_param); - if (dst_size > 1) { - shader_addline(buffer, "vec%d(log2(abs(%s))));\n", dst_size, src0_param.param_str); - } else { - shader_addline(buffer, "log2(abs(%s)));\n", src0_param.param_str); + if (dst_size > 1) + { + shader_addline(buffer, "vec%d(%s == 0.0 ? -FLT_MAX : log2(abs(%s))));\n", + dst_size, src0_param.param_str, src0_param.param_str); + } + else + { + shader_addline(buffer, "%s == 0.0 ? -FLT_MAX : log2(abs(%s)));\n", + src0_param.param_str, src0_param.param_str); } }