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| author | Igor Melichev <igor.melichev@artifex.com> | 2007-05-02 19:12:52 +0000 |
|---|---|---|
| committer | Igor Melichev <igor.melichev@artifex.com> | 2007-05-02 19:12:52 +0000 |
| commit | 2472b41472a3295526a7cbc50e9d89f2cefafa7e (patch) | |
| tree | 899f5590c557cc39235f98b318122fd924012a5a | |
| parent | 75ae1c5b00d6a1458c7650c5aba4ba5e1882f1b3 (diff) | |
| download | ghostpdl-2472b41472a3295526a7cbc50e9d89f2cefafa7e.tar.gz | |
Fix (shadings) : The color space linearity check didn't account the color precision.
DETAILS :
This partially improves performance for the test case of
the bug 689189 "PDF fails with /unregistered in --shfill--".
Since the color space represents color with precision 1/255,
the shadings code must not try to obtain a better precision.
This patch accounts the color quantum in is_dc_nearly_linear.
EXPECTED DIFFERENCES :
A minor difference in shading color :
"comparefiles\464-01-fixed.ps"
"comparefiles\478-01.ps"
"comparefiles\Clarke Tate Manns Chinese.ai"
"comparefiles\Openhuis_pdf_zw.pdf"
"comparefiles\STEUER-RollingMesh 1(linear).ai"
"comparefiles\STEUER-RollingMesh 2(radial).ai"
"comparefiles\STEUER-RollingMesh 3(Final).ai"
"CET\09-47H.PS"
"CET\12-14L.PS"
"CET\12-14R.PS"
"CET\12-14S.PS"
git-svn-id: http://svn.ghostscript.com/ghostscript/trunk@7894 a1074d23-0009-0410-80fe-cf8c14f379e6
| -rw-r--r-- | gs/src/gscspace.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gs/src/gscspace.c b/gs/src/gscspace.c index 94e530b92..303fb6db6 100644 --- a/gs/src/gscspace.c +++ b/gs/src/gscspace.c @@ -470,6 +470,7 @@ is_dc_nearly_linear(const gx_device *dev, const gx_device_color *c, const gx_device_color *c0, const gx_device_color *c1, double t, int n, float smoothness) { + if (c0->type == &gx_dc_type_data_pure) { int i; gx_color_index pure0 = c0->colors.pure; @@ -481,11 +482,12 @@ is_dc_nearly_linear(const gx_device *dev, const gx_device_color *c, int mask = (1 << dev->color_info.comp_bits[i]) - 1; int max_color = (i == dev->color_info.gray_index ? dev->color_info.max_gray : dev->color_info.max_color); + float max_diff = max(1, max_color * smoothness); int b0 = (pure0 >> shift) & mask, b1 = (pure1 >> shift) & mask; int b = (pure >> shift) & mask; double bb = b0 * t + b1 * (1 - t); - if (any_abs(b - bb) > max_color * smoothness) + if (any_abs(b - bb) > max_diff) return false; } return true; |