| /* |
| * 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 */ |
