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wined3d: Correct implementation of D3DSIO_LOOP. 

I initially misread the specification.  src0.x is the iteration count,
not the max amount for the loop register.  This fixes that.
This commit is contained in:
Jason Green 2006-06-16 23:01:20 -04:00 committed by Alexandre Julliard
parent fd83de7129
commit c13f097de3
1 changed files with 8 additions and 5 deletions
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13
dlls/wined3d/glsl_shader.c
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@ -333,8 +333,10 @@ void shader_generate_glsl_declarations(
}
/* Declare loop register aL */
if (reg_maps->loop)
if (reg_maps->loop) {
shader_addline(buffer, "int aL;\n");
shader_addline(buffer, "int tmpInt;\n");
}
/* Temporary variables for matrix operations */
shader_addline(buffer, "vec4 tmp0;\n");
@ -1157,7 +1159,8 @@ void shader_glsl_sincos(SHADER_OPCODE_ARG* arg) {
/** Process the D3DSIO_LOOP instruction in GLSL:
* Start a for() loop where src0.y is the initial value of aL,
* increment aL by src0.z while (aL < src0.x).
* increment aL by src0.z for a total of src0.x iterations.
* Need to use a temporary variable for this operation.
*/
void shader_glsl_loop(SHADER_OPCODE_ARG* arg) {
@ -1166,9 +1169,9 @@ void shader_glsl_loop(SHADER_OPCODE_ARG* arg) {
char src0_mask[6];
shader_glsl_add_param(arg, arg->src[0], arg->src_addr[0], TRUE, src0_reg, src0_mask, src0_str);
shader_addline(arg->buffer, "for (aL = %s.y; aL < %s.x; aL += %s.z) {\n",
src0_reg, src0_reg, src0_reg);
shader_addline(arg->buffer, "for (tmpInt = 0, aL = %s.y; tmpInt < %s.x; tmpInt++, aL += %s.z) {\n",
src0_reg, src0_reg, src0_reg);
}
/** Process the D3DSIO_ENDLOOP instruction in GLSL: