kopia lustrzana https://github.com/raspberrypi/pico-playground
75 wiersze
1.5 KiB
C
75 wiersze
1.5 KiB
C
/*
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* Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef _RENDER_IMAGE_H
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#define _RENDER_IMAGE_H
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#include "pico.h"
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typedef uint16_t short_flags;
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// common flags
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#define CF_HAS_OPAQUE ((short_flags)1)
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#define CF_HAS_SEMI_TRANSPARENT ((short_flags)2)
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#define CF_HAS_TRANSPARENT ((short_flags)4)
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#define CF_PALETTE_INDEX_0_TRANSPARENT ((short_flags)8)
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#define CF_PALETTE_COMPOSITED ((short_flags)16)
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#define CF_OPACITY_MASK (CF_HAS_OPAQUE | CF_HAS_SEMI_TRANSPARENT | CF_HAS_TRANSPARENT)
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struct palette32 {
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uint16_t size;
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short_flags flags;
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uint32_t entries[];
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};
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struct palette16 {
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uint16_t size;
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short_flags flags;
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uint32_t composited_on_color; // if flags & CF_PALETTE_COMPOSITED
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uint16_t entries[];
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};
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enum image_format {
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IMG_FMT_4BIT_VOGON = 1,
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IMG_FMT_8_BIT_RAW,
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IMG_FMT_16_BIT_RAW
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};
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struct blob {
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size_t size;
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const uint8_t *bytes;
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};
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struct image_data {
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int format;
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int width;
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int height;
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struct blob blob;
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const uint16_t *row_offsets; // optional and possibly initted on demand
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};
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struct tile_data {
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uint8_t depth;
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uint16_t count;
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uint16_t width;
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uint16_t height;
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struct blob blob;
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const uint16_t *span_numbers;
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};
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struct tile_data16 {
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uint16_t count;
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uint16_t width;
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uint16_t height;
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struct blob blob;
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const uint16_t *span_offsets;
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};
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extern struct palette16 *blend_palette(const struct palette32 *source, uint32_t back_color);
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#endif //SOFTWARE_IMAGE_H
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