diff options
Diffstat (limited to 'quantum/painter/qgf.c')
| -rw-r--r-- | quantum/painter/qgf.c | 292 |
1 files changed, 292 insertions, 0 deletions
diff --git a/quantum/painter/qgf.c b/quantum/painter/qgf.c new file mode 100644 index 0000000000..834837105b --- /dev/null +++ b/quantum/painter/qgf.c @@ -0,0 +1,292 @@ +// Copyright 2021 Nick Brassel (@tzarc) +// SPDX-License-Identifier: GPL-2.0-or-later + +// Quantum Graphics File "QGF" File Format. +// See https://docs.qmk.fm/#/quantum_painter_qgf for more information. + +#include "qgf.h" +#include "qp_draw.h" + +//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// QGF API + +bool qgf_validate_block_header(qgf_block_header_v1_t *desc, uint8_t expected_typeid, int32_t expected_length) { + if (desc->type_id != expected_typeid || desc->neg_type_id != ((~expected_typeid) & 0xFF)) { + qp_dprintf("Failed to validate header, expected typeid 0x%02X, was 0x%02X, expected negated typeid 0x%02X, was 0x%02X\n", (int)expected_typeid, (int)desc->type_id, (int)((~desc->type_id) & 0xFF), (int)desc->neg_type_id); + return false; + } + + if (expected_length >= 0 && desc->length != expected_length) { + qp_dprintf("Failed to validate header (typeid 0x%02X), expected length %d, was %d\n", (int)desc->type_id, (int)expected_length, (int)desc->length); + return false; + } + + return true; +} + +bool qgf_parse_format(qp_image_format_t format, uint8_t *bpp, bool *has_palette) { + // clang-format off + static const struct QP_PACKED { + uint8_t bpp; + bool has_palette; + } formats[] = { + [GRAYSCALE_1BPP] = {.bpp = 1, .has_palette = false}, + [GRAYSCALE_2BPP] = {.bpp = 2, .has_palette = false}, + [GRAYSCALE_4BPP] = {.bpp = 4, .has_palette = false}, + [GRAYSCALE_8BPP] = {.bpp = 8, .has_palette = false}, + [PALETTE_1BPP] = {.bpp = 1, .has_palette = true}, + [PALETTE_2BPP] = {.bpp = 2, .has_palette = true}, + [PALETTE_4BPP] = {.bpp = 4, .has_palette = true}, + [PALETTE_8BPP] = {.bpp = 8, .has_palette = true}, + }; + // clang-format on + + // Copy out the required info + if (format > PALETTE_8BPP) { + qp_dprintf("Failed to parse frame_descriptor, invalid format 0x%02X\n", (int)format); + return false; + } + + // Copy out the required info + if (bpp) { + *bpp = formats[format].bpp; + } + if (has_palette) { + *has_palette = formats[format].has_palette; + } + + return true; +} + +bool qgf_parse_frame_descriptor(qgf_frame_v1_t *frame_descriptor, uint8_t *bpp, bool *has_palette, bool *is_delta, painter_compression_t *compression_scheme, uint16_t *delay) { + // Decode the format + qgf_parse_format(frame_descriptor->format, bpp, has_palette); + + // Copy out the required info + if (is_delta) { + *is_delta = (frame_descriptor->flags & QGF_FRAME_FLAG_DELTA) == QGF_FRAME_FLAG_DELTA; + } + if (compression_scheme) { + *compression_scheme = frame_descriptor->compression_scheme; + } + if (delay) { + *delay = frame_descriptor->delay; + } + + return true; +} + +bool qgf_read_graphics_descriptor(qp_stream_t *stream, uint16_t *image_width, uint16_t *image_height, uint16_t *frame_count, uint32_t *total_bytes) { + // Seek to the start + qp_stream_setpos(stream, 0); + + // Read and validate the graphics descriptor + qgf_graphics_descriptor_v1_t graphics_descriptor; + if (qp_stream_read(&graphics_descriptor, sizeof(qgf_graphics_descriptor_v1_t), 1, stream) != 1) { + qp_dprintf("Failed to read graphics_descriptor, expected length was not %d\n", (int)sizeof(qgf_graphics_descriptor_v1_t)); + return false; + } + + // Make sure this block is valid + if (!qgf_validate_block_header(&graphics_descriptor.header, QGF_GRAPHICS_DESCRIPTOR_TYPEID, (sizeof(qgf_graphics_descriptor_v1_t) - sizeof(qgf_block_header_v1_t)))) { + return false; + } + + // Make sure the magic and version are correct + if (graphics_descriptor.magic != QGF_MAGIC || graphics_descriptor.qgf_version != 0x01) { + qp_dprintf("Failed to validate graphics_descriptor, expected magic 0x%06X was 0x%06X, expected version = 0x%02X was 0x%02X\n", (int)QGF_MAGIC, (int)graphics_descriptor.magic, (int)0x01, (int)graphics_descriptor.qgf_version); + return false; + } + + // Make sure the file length is valid + if (graphics_descriptor.neg_total_file_size != ~graphics_descriptor.total_file_size) { + qp_dprintf("Failed to validate graphics_descriptor, expected negated length 0x%08X was 0x%08X\n", (int)(~graphics_descriptor.total_file_size), (int)graphics_descriptor.neg_total_file_size); + return false; + } + + // Copy out the required info + if (image_width) { + *image_width = graphics_descriptor.image_width; + } + if (image_height) { + *image_height = graphics_descriptor.image_height; + } + if (frame_count) { + *frame_count = graphics_descriptor.frame_count; + } + if (total_bytes) { + *total_bytes = graphics_descriptor.total_file_size; + } + + return true; +} + +static bool qgf_read_frame_offset(qp_stream_t *stream, uint16_t frame_number, uint32_t *frame_offset) { + uint16_t frame_count; + if (!qgf_read_graphics_descriptor(stream, NULL, NULL, &frame_count, NULL)) { + return false; + } + + // Read the frame offsets descriptor + qgf_frame_offsets_v1_t frame_offsets; + if (qp_stream_read(&frame_offsets, sizeof(qgf_frame_offsets_v1_t), 1, stream) != 1) { + qp_dprintf("Failed to read frame_offsets, expected length was not %d\n", (int)sizeof(qgf_frame_offsets_v1_t)); + return false; + } + + // Make sure this block is valid + if (!qgf_validate_block_header(&frame_offsets.header, QGF_FRAME_OFFSET_DESCRIPTOR_TYPEID, (frame_count * sizeof(uint32_t)))) { + return false; + } + + if (frame_number >= frame_count) { + qp_dprintf("Invalid frame number, was %d but only %d frames in image\n", (int)frame_number, (int)frame_count); + return false; + } + + // Skip the necessary amount of data to get to the requested frame offset + qp_stream_seek(stream, frame_number * sizeof(uint32_t), SEEK_CUR); + + // Read the frame offset + uint32_t offset = 0; + if (qp_stream_read(&offset, sizeof(uint32_t), 1, stream) != 1) { + qp_dprintf("Failed to read frame offset, expected length was not %d\n", (int)sizeof(uint32_t)); + return false; + } + + // Copy out the required info + if (frame_offset) { + *frame_offset = offset; + } + + return true; +} + +void qgf_seek_to_frame_descriptor(qp_stream_t *stream, uint16_t frame_number) { + // Read the offset + uint32_t offset = 0; + qgf_read_frame_offset(stream, frame_number, &offset); + + // Move to the offset + qp_stream_setpos(stream, offset); +} + +bool qgf_validate_frame_descriptor(qp_stream_t *stream, uint16_t frame_number, uint8_t *bpp, bool *has_palette, bool *is_delta) { + // Seek to the correct location + qgf_seek_to_frame_descriptor(stream, frame_number); + + // Read the raw descriptor + qgf_frame_v1_t frame_descriptor; + if (qp_stream_read(&frame_descriptor, sizeof(qgf_frame_v1_t), 1, stream) != 1) { + qp_dprintf("Failed to read frame_descriptor, expected length was not %d\n", (int)sizeof(qgf_frame_v1_t)); + return false; + } + + // Make sure this block is valid + if (!qgf_validate_block_header(&frame_descriptor.header, QGF_FRAME_DESCRIPTOR_TYPEID, (sizeof(qgf_frame_v1_t) - sizeof(qgf_block_header_v1_t)))) { + return false; + } + + return qgf_parse_frame_descriptor(&frame_descriptor, bpp, has_palette, is_delta, NULL, NULL); +} + +bool qgf_validate_palette_descriptor(qp_stream_t *stream, uint16_t frame_number, uint8_t bpp) { + // Read the palette descriptor + qgf_palette_v1_t palette_descriptor; + if (qp_stream_read(&palette_descriptor, sizeof(qgf_palette_v1_t), 1, stream) != 1) { + qp_dprintf("Failed to read palette_descriptor, expected length was not %d\n", (int)sizeof(qgf_palette_v1_t)); + return false; + } + + // Make sure this block is valid + uint32_t expected_length = (1 << bpp) * 3 * sizeof(uint8_t); + if (!qgf_validate_block_header(&palette_descriptor.header, QGF_FRAME_PALETTE_DESCRIPTOR_TYPEID, expected_length)) { + return false; + } + + // Move forward in the stream to the next block + qp_stream_seek(stream, expected_length, SEEK_CUR); + return true; +} + +bool qgf_validate_delta_descriptor(qp_stream_t *stream, uint16_t frame_number) { + // Read the delta descriptor + qgf_delta_v1_t delta_descriptor; + if (qp_stream_read(&delta_descriptor, sizeof(qgf_delta_v1_t), 1, stream) != 1) { + qp_dprintf("Failed to read delta_descriptor, expected length was not %d\n", (int)sizeof(qgf_delta_v1_t)); + return false; + } + + // Make sure this block is valid + if (!qgf_validate_block_header(&delta_descriptor.header, QGF_FRAME_DELTA_DESCRIPTOR_TYPEID, (sizeof(qgf_delta_v1_t) - sizeof(qgf_block_header_v1_t)))) { + return false; + } + + return true; +} + +bool qgf_validate_frame_data_descriptor(qp_stream_t *stream, uint16_t frame_number) { + // Read and validate the data block + qgf_data_v1_t data_descriptor; + if (qp_stream_read(&data_descriptor, sizeof(qgf_data_v1_t), 1, stream) != 1) { + qp_dprintf("Failed to read data_descriptor, expected length was not %d\n", (int)sizeof(qgf_data_v1_t)); + return false; + } + + if (!qgf_validate_block_header(&data_descriptor.header, QGF_FRAME_DATA_DESCRIPTOR_TYPEID, -1)) { + return false; + } + + return true; +} + +bool qgf_validate_stream(qp_stream_t *stream) { + uint16_t frame_count; + if (!qgf_read_graphics_descriptor(stream, NULL, NULL, &frame_count, NULL)) { + return false; + } + + // Read and validate all the frames (automatically validates the frame offset descriptor in the process) + for (uint16_t i = 0; i < frame_count; ++i) { + // Validate the frame descriptor block + uint8_t bpp; + bool has_palette; + bool has_delta; + if (!qgf_validate_frame_descriptor(stream, i, &bpp, &has_palette, &has_delta)) { + return false; + } + + // If we've got a palette block, check it + if (has_palette && !qgf_validate_palette_descriptor(stream, i, bpp)) { + return false; + } + + // If we've got a delta block, check it + if (has_delta && !qgf_validate_delta_descriptor(stream, i)) { + return false; + } + + // Check the data block + if (!qgf_validate_frame_data_descriptor(stream, i)) { + return false; + } + } + + return true; +} + +// Work out the total size of an image definition, assuming we can read far enough into the file +uint32_t qgf_get_total_size(qp_stream_t *stream) { + // Get the original location + uint32_t oldpos = qp_stream_tell(stream); + + // Read the graphics descriptor, grabbing the size + uint32_t total_size; + if (!qgf_read_graphics_descriptor(stream, NULL, NULL, NULL, &total_size)) { + return false; + } + + // Restore the original location + qp_stream_setpos(stream, oldpos); + return total_size; +} |