diff options
| author | Robin Watts <Robin.Watts@artifex.com> | 2023-01-31 14:31:43 +0000 |
|---|---|---|
| committer | Robin Watts <Robin.Watts@artifex.com> | 2023-02-10 16:13:32 +0000 |
| commit | c52b4a80cdfc6d9b7d04f52c4a872717aeeff73c (patch) | |
| tree | 84b003f236c2cf8167f7db1faafddd5fff61f582 /base | |
| parent | 772d6f3f65b9453df52fb3f12058613842e3565c (diff) | |
| download | ghostpdl-c52b4a80cdfc6d9b7d04f52c4a872717aeeff73c.tar.gz | |
Bug 706368: alphabits device declares invalid width/height.
We now assume that every device will give a true width and
height (or set them to zero), so that callers can clip graphic
operations to the extent of the device that is being called.
The alphabits device was breaking this, and giving a much smaller
width/height than was really the case. This caused us to incorrectly
clip.
Diffstat (limited to 'base')
| -rw-r--r-- | base/gdevddrw.c | 6 | ||||
| -rw-r--r-- | base/gspaint.c | 9 |
2 files changed, 9 insertions, 6 deletions
diff --git a/base/gdevddrw.c b/base/gdevddrw.c index 347c6c252..07c9c0159 100644 --- a/base/gdevddrw.c +++ b/base/gdevddrw.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2001-2022 Artifex Software, Inc. +/* Copyright (C) 2001-2023 Artifex Software, Inc. All Rights Reserved. This software is provided AS-IS with no warranty, either express or @@ -427,7 +427,7 @@ gx_default_fill_trapezoid(gx_device * dev, const gs_fixed_edge * left, /* Some devices init max->width to be int_max, which overflows when converted to fixed. */ int dw = dev->width > max_int_in_fixed ? max_int_in_fixed : dev->width; if (ytop < 0) - return 0; + return 0; if (ybot < 0) ybot = 0; dw = int2fixed(dw); @@ -447,7 +447,7 @@ gx_default_fill_trapezoid(gx_device * dev, const gs_fixed_edge * left, /* Some devices init max->height to be int_max, which overflows when converted to fixed. */ int dh = dev->height > max_int_in_fixed ? max_int_in_fixed : dev->height; if (ytop < 0) - return 0; + return 0; if (ybot < 0) ybot = 0; dh = int2fixed(dh); diff --git a/base/gspaint.c b/base/gspaint.c index d67ef36bc..b3500c1d5 100644 --- a/base/gspaint.c +++ b/base/gspaint.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2001-2022 Artifex Software, Inc. +/* Copyright (C) 2001-2023 Artifex Software, Inc. All Rights Reserved. This software is provided AS-IS with no warranty, either express or @@ -208,6 +208,7 @@ alpha_buffer_init(gs_gstate * pgs, fixed extra_x, fixed extra_y, int alpha_bits, gs_fixed_rect bbox; gs_int_rect ibox; uint width, raster, band_space; + uint dev_width, dev_height; uint height, height2; gs_log2_scale_point log2_scale; gs_memory_t *mem; @@ -223,6 +224,7 @@ alpha_buffer_init(gs_gstate * pgs, fixed extra_x, fixed extra_y, int alpha_bits, if ((ibox.q.y <= ibox.p.y) || (ibox.q.x <= ibox.p.x)) return 2; width = (ibox.q.x - ibox.p.x) << log2_scale.x; + dev_width = ibox.q.x << log2_scale.x; raster = bitmap_raster(width); band_space = raster << log2_scale.y; height2 = (ibox.q.y - ibox.p.y); @@ -232,6 +234,7 @@ alpha_buffer_init(gs_gstate * pgs, fixed extra_x, fixed extra_y, int alpha_bits, if (height > height2) height = height2; height <<= log2_scale.y; + dev_height = ibox.q.y << log2_scale.y; mem = pgs->memory; mdev = gs_alloc_struct(mem, gx_device_memory, &st_device_memory, "alpha_buffer_init"); @@ -244,8 +247,8 @@ alpha_buffer_init(gs_gstate * pgs, fixed extra_x, fixed extra_y, int alpha_bits, } gs_make_mem_abuf_device(mdev, mem, dev, &log2_scale, alpha_bits, ibox.p.x << log2_scale.x, devn); - mdev->width = width; - mdev->height = height; + mdev->width = dev_width; + mdev->height = dev_height; mdev->bitmap_memory = mem; if ((*dev_proc(mdev, open_device)) ((gx_device *) mdev) < 0) { /* No room for bits, punt. */ |