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/*
* SPDX-License-Identifier: MIT
*
* Tiny subset of PIXMAN API commonly used by QEMU.
*
* Copyright 1987, 1988, 1989, 1998 The Open Group
* Copyright 1987, 1988, 1989 Digital Equipment Corporation
* Copyright 1999, 2004, 2008 Keith Packard
* Copyright 2000 SuSE, Inc.
* Copyright 2000 Keith Packard, member of The XFree86 Project, Inc.
* Copyright 2004, 2005, 2007, 2008, 2009, 2010 Red Hat, Inc.
* Copyright 2004 Nicholas Miell
* Copyright 2005 Lars Knoll & Zack Rusin, Trolltech
* Copyright 2005 Trolltech AS
* Copyright 2007 Luca Barbato
* Copyright 2008 Aaron Plattner, NVIDIA Corporation
* Copyright 2008 Rodrigo Kumpera
* Copyright 2008 André Tupinambá
* Copyright 2008 Mozilla Corporation
* Copyright 2008 Frederic Plourde
* Copyright 2009, Oracle and/or its affiliates. All rights reserved.
* Copyright 2009, 2010 Nokia Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef PIXMAN_MINIMAL_H
#define PIXMAN_MINIMAL_H
#define PIXMAN_TYPE_OTHER 0
#define PIXMAN_TYPE_ARGB 2
#define PIXMAN_TYPE_ABGR 3
#define PIXMAN_TYPE_BGRA 8
#define PIXMAN_TYPE_RGBA 9
#define PIXMAN_FORMAT(bpp, type, a, r, g, b) (((bpp) << 24) | \
((type) << 16) | \
((a) << 12) | \
((r) << 8) | \
((g) << 4) | \
((b)))
#define PIXMAN_FORMAT_RESHIFT(val, ofs, num) \
(((val >> (ofs)) & ((1 << (num)) - 1)) << ((val >> 22) & 3))
#define PIXMAN_FORMAT_BPP(f) PIXMAN_FORMAT_RESHIFT(f, 24, 8)
#define PIXMAN_FORMAT_TYPE(f) (((f) >> 16) & 0x3f)
#define PIXMAN_FORMAT_A(f) PIXMAN_FORMAT_RESHIFT(f, 12, 4)
#define PIXMAN_FORMAT_R(f) PIXMAN_FORMAT_RESHIFT(f, 8, 4)
#define PIXMAN_FORMAT_G(f) PIXMAN_FORMAT_RESHIFT(f, 4, 4)
#define PIXMAN_FORMAT_B(f) PIXMAN_FORMAT_RESHIFT(f, 0, 4)
#define PIXMAN_FORMAT_DEPTH(f) (PIXMAN_FORMAT_A(f) + \
PIXMAN_FORMAT_R(f) + \
PIXMAN_FORMAT_G(f) + \
PIXMAN_FORMAT_B(f))
typedef enum {
/* 32bpp formats */
PIXMAN_a8r8g8b8 = PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 8, 8, 8, 8),
PIXMAN_x8r8g8b8 = PIXMAN_FORMAT(32, PIXMAN_TYPE_ARGB, 0, 8, 8, 8),
PIXMAN_a8b8g8r8 = PIXMAN_FORMAT(32, PIXMAN_TYPE_ABGR, 8, 8, 8, 8),
PIXMAN_x8b8g8r8 = PIXMAN_FORMAT(32, PIXMAN_TYPE_ABGR, 0, 8, 8, 8),
PIXMAN_b8g8r8a8 = PIXMAN_FORMAT(32, PIXMAN_TYPE_BGRA, 8, 8, 8, 8),
PIXMAN_b8g8r8x8 = PIXMAN_FORMAT(32, PIXMAN_TYPE_BGRA, 0, 8, 8, 8),
PIXMAN_r8g8b8a8 = PIXMAN_FORMAT(32, PIXMAN_TYPE_RGBA, 8, 8, 8, 8),
PIXMAN_r8g8b8x8 = PIXMAN_FORMAT(32, PIXMAN_TYPE_RGBA, 0, 8, 8, 8),
/* 24bpp formats */
PIXMAN_r8g8b8 = PIXMAN_FORMAT(24, PIXMAN_TYPE_ARGB, 0, 8, 8, 8),
PIXMAN_b8g8r8 = PIXMAN_FORMAT(24, PIXMAN_TYPE_ABGR, 0, 8, 8, 8),
/* 16bpp formats */
PIXMAN_r5g6b5 = PIXMAN_FORMAT(16, PIXMAN_TYPE_ARGB, 0, 5, 6, 5),
PIXMAN_a1r5g5b5 = PIXMAN_FORMAT(16, PIXMAN_TYPE_ARGB, 1, 5, 5, 5),
PIXMAN_x1r5g5b5 = PIXMAN_FORMAT(16, PIXMAN_TYPE_ARGB, 0, 5, 5, 5),
} pixman_format_code_t;
typedef struct pixman_image pixman_image_t;
typedef void (*pixman_image_destroy_func_t)(pixman_image_t *image, void *data);
struct pixman_image {
int ref_count;
pixman_format_code_t format;
int width;
int height;
int stride;
uint32_t *data;
uint32_t *free_me;
pixman_image_destroy_func_t destroy_func;
void *destroy_data;
};
typedef struct pixman_color {
uint16_t red;
uint16_t green;
uint16_t blue;
uint16_t alpha;
} pixman_color_t;
static inline uint32_t *create_bits(pixman_format_code_t format,
int width,
int height,
int *rowstride_bytes)
{
int stride = 0;
size_t buf_size = 0;
int bpp = PIXMAN_FORMAT_BPP(format);
/*
* Calculate the following while checking for overflow truncation:
* stride = ((width * bpp + 0x1f) >> 5) * sizeof(uint32_t);
*/
if (unlikely(__builtin_mul_overflow(width, bpp, &stride))) {
return NULL;
}
if (unlikely(__builtin_add_overflow(stride, 0x1f, &stride))) {
return NULL;
}
stride >>= 5;
stride *= sizeof(uint32_t);
if (unlikely(__builtin_mul_overflow((size_t) height,
(size_t) stride,
&buf_size))) {
return NULL;
}
if (rowstride_bytes) {
*rowstride_bytes = stride;
}
return g_malloc0(buf_size);
}
static inline pixman_image_t *pixman_image_create_bits(pixman_format_code_t format,
int width,
int height,
uint32_t *bits,
int rowstride_bytes)
{
pixman_image_t *i = g_new0(pixman_image_t, 1);
i->width = width;
i->height = height;
i->format = format;
if (bits) {
i->data = bits;
} else {
i->free_me = i->data =
create_bits(format, width, height, &rowstride_bytes);
if (width && height) {
assert(i->data);
}
}
i->stride = rowstride_bytes ? rowstride_bytes :
width * DIV_ROUND_UP(PIXMAN_FORMAT_BPP(format), 8);
i->ref_count = 1;
return i;
}
static inline pixman_image_t *pixman_image_ref(pixman_image_t *i)
{
i->ref_count++;
return i;
}
static inline bool pixman_image_unref(pixman_image_t *i)
{
i->ref_count--;
if (i->ref_count == 0) {
if (i->destroy_func) {
i->destroy_func(i, i->destroy_data);
}
g_free(i->free_me);
g_free(i);
return true;
}
return false;
}
static inline void pixman_image_set_destroy_function(pixman_image_t *i,
pixman_image_destroy_func_t func,
void *data)
{
i->destroy_func = func;
i->destroy_data = data;
}
static inline uint32_t *pixman_image_get_data(pixman_image_t *i)
{
return i->data;
}
static inline int pixman_image_get_height(pixman_image_t *i)
{
return i->height;
}
static inline int pixman_image_get_width(pixman_image_t *i)
{
return i->width;
}
static inline int pixman_image_get_stride(pixman_image_t *i)
{
return i->stride;
}
static inline pixman_format_code_t pixman_image_get_format(pixman_image_t *i)
{
return i->format;
}
#endif /* PIXMAN_MINIMAL_H */
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