[WINED3D 8/7] Correct implementation of D3DSIO_LOOP
Jason Green
jave27 at gmail.com
Fri Jun 16 22:01:20 CDT 2006
- I initially misread the specification. src0.x is the iteration
count, not the max amount for the loop register. This fixes that.
-------------- next part --------------
From nobody Mon Sep 17 00:00:00 2001
From: Jason <jason at jave02.(none)>
Date: Fri, 16 Jun 2006 22:59:55 -0400
Subject: [PATCH] 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.
---
dlls/wined3d/glsl_shader.c | 13 ++++++++-----
1 files changed, 8 insertions(+), 5 deletions(-)
511d2834548225e2609113f33bc7e44d471eb514
diff --git a/dlls/wined3d/glsl_shader.c b/dlls/wined3d/glsl_shader.c
index e5f9d2c..7b611f4 100644
--- a/dlls/wined3d/glsl_shader.c
+++ b/dlls/wined3d/glsl_shader.c
@@ -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");
@@ -1154,7 +1156,8 @@ void shader_glsl_sincos(SHADER_OPCODE_AR
/** 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) {
@@ -1163,9 +1166,9 @@ void shader_glsl_loop(SHADER_OPCODE_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:
--
1.3.3
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