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wined3d: Fix cmp instruction for GLSL. 

The current GLSL cmp instruction is incorrect, because:
- it ignores destination write mask
- it ignores source swizzle
- it ignores other source modifiers.
- it works incorrectly for src0 = 0
This commit is contained in:
Ivan Gyurdiev 2006-07-13 20:31:00 -06:00 committed by Alexandre Julliard
parent 07eb6531a3
commit 436d700c2e
1 changed files with 5 additions and 6 deletions
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9
dlls/wined3d/glsl_shader.c
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@ -987,6 +987,7 @@ void shader_glsl_compare(SHADER_OPCODE_ARG* arg) {
/** Process CMP instruction in GLSL (dst = src0.x > 0.0 ? src1.x : src2.x), per channel */
void shader_glsl_cmp(SHADER_OPCODE_ARG* arg) {
char tmpLine[256];
char dst_str[100], src0_str[100], src1_str[100], src2_str[100];
char dst_reg[50], src0_reg[50], src1_reg[50], src2_reg[50];
char dst_mask[6], src0_mask[6], src1_mask[6], src2_mask[6];
@ -996,11 +997,9 @@ void shader_glsl_cmp(SHADER_OPCODE_ARG* arg) {
shader_glsl_add_param(arg, arg->src[1], arg->src_addr[1], TRUE, src1_reg, src1_mask, src1_str);
shader_glsl_add_param(arg, arg->src[2], arg->src_addr[2], TRUE, src2_reg, src2_mask, src2_str);
/* FIXME: This isn't correct - doesn't take the dst's swizzle into account. */
shader_addline(arg->buffer, "%s.x = (%s.x > 0.0) ? %s.x : %s.x;\n", dst_reg, src0_reg, src1_reg, src2_reg);
shader_addline(arg->buffer, "%s.y = (%s.y > 0.0) ? %s.y : %s.y;\n", dst_reg, src0_reg, src1_reg, src2_reg);
shader_addline(arg->buffer, "%s.z = (%s.z > 0.0) ? %s.z : %s.z;\n", dst_reg, src0_reg, src1_reg, src2_reg);
shader_addline(arg->buffer, "%s.w = (%s.w > 0.0) ? %s.w : %s.w;\n", dst_reg, src0_reg, src1_reg, src2_reg);
shader_glsl_add_dst(arg->dst, dst_reg, dst_mask, tmpLine);
shader_addline(arg->buffer, "%smix(vec4(%s), vec4(%s), vec4(lessThan(vec4(%s), vec4(0.0)))))%s;\n",
tmpLine, src1_str, src2_str, src0_str, dst_mask);
}
/** Process the CND opcode in GLSL (dst = (src0 < 0.5) ? src1 : src2) */