wined3d: Fix clamping in reading rectangular YV12 textures.

The lower bound for chroma components is size.y + 1/2, not size.y - 1/2.

wined3d: Fix clamping in reading rectangular YV12 textures.
963c26b3 · Martin Storsjo · Alexandre Julliard · d3b14079 · 963c26b3
Commit 963c26b3 authored Feb 11, 2014 by Martin Storsjo Committed by Alexandre Julliard Feb 11, 2014
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arb_program_shader.c dlls/wined3d/arb_program_shader.c +1 -1

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--- a/dlls/wined3d/arb_program_shader.c
+++ b/dlls/wined3d/arb_program_shader.c
@@ -7003,7 +7003,7 @@ static BOOL gen_yv12_read(struct wined3d_shader_buffer *buffer, GLenum textype, 
        shader_addline(buffer, "MAD temp.y, size.y, coef.w, size.y;\n");
        shader_addline(buffer, "ADD temp.y, temp.y, -coef.y;\n");
        shader_addline(buffer, "MIN texcrd.y, temp.y, texcrd.y;\n");
-        shader_addline(buffer, "ADD temp.y, size.y, -coef.y;\n");
+        shader_addline(buffer, "ADD temp.y, size.y, coef.y;\n");
        shader_addline(buffer, "MAX texcrd.y, temp.y, texcrd.y;\n");
    }
    /* Read the texture, put the result into the output register */