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142 lines
6.0 KiB
142 lines
6.0 KiB
// Copyright 2021 Nick Brassel (@tzarc)
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "qp_internal.h"
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#include "qp_draw.h"
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#include "qp_comms.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Palette / Monochrome-format decoder
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static const qp_pixel_t qp_pixel_white = {.hsv888 = {.h = 0, .s = 0, .v = 255}};
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static const qp_pixel_t qp_pixel_black = {.hsv888 = {.h = 0, .s = 0, .v = 0}};
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bool qp_internal_bpp_capable(uint8_t bits_per_pixel) {
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#if !(QUANTUM_PAINTER_SUPPORTS_256_PALETTE)
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if (bits_per_pixel > 4) {
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qp_dprintf("qp_internal_decode_palette: image bpp greater than 4\n");
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return false;
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}
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#endif
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if (bits_per_pixel > 8) {
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qp_dprintf("qp_internal_decode_palette: image bpp greater than 8\n");
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return false;
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}
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return true;
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}
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bool qp_internal_decode_palette(painter_device_t device, uint32_t pixel_count, uint8_t bits_per_pixel, qp_internal_byte_input_callback input_callback, void* input_arg, qp_pixel_t* palette, qp_internal_pixel_output_callback output_callback, void* output_arg) {
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const uint8_t pixel_bitmask = (1 << bits_per_pixel) - 1;
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const uint8_t pixels_per_byte = 8 / bits_per_pixel;
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uint32_t remaining_pixels = pixel_count; // don't try to derive from byte_count, we may not use an entire byte
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while (remaining_pixels > 0) {
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uint8_t byteval = input_callback(input_arg);
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if (byteval < 0) {
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return false;
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}
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uint8_t loop_pixels = remaining_pixels < pixels_per_byte ? remaining_pixels : pixels_per_byte;
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for (uint8_t q = 0; q < loop_pixels; ++q) {
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if (!output_callback(palette, byteval & pixel_bitmask, output_arg)) {
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return false;
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}
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byteval >>= bits_per_pixel;
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}
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remaining_pixels -= loop_pixels;
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}
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return true;
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}
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bool qp_internal_decode_grayscale(painter_device_t device, uint32_t pixel_count, uint8_t bits_per_pixel, qp_internal_byte_input_callback input_callback, void* input_arg, qp_internal_pixel_output_callback output_callback, void* output_arg) {
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return qp_internal_decode_recolor(device, pixel_count, bits_per_pixel, input_callback, input_arg, qp_pixel_white, qp_pixel_black, output_callback, output_arg);
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}
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bool qp_internal_decode_recolor(painter_device_t device, uint32_t pixel_count, uint8_t bits_per_pixel, qp_internal_byte_input_callback input_callback, void* input_arg, qp_pixel_t fg_hsv888, qp_pixel_t bg_hsv888, qp_internal_pixel_output_callback output_callback, void* output_arg) {
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struct painter_driver_t* driver = (struct painter_driver_t*)device;
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int16_t steps = 1 << bits_per_pixel; // number of items we need to interpolate
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if (qp_internal_interpolate_palette(fg_hsv888, bg_hsv888, steps)) {
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if (!driver->driver_vtable->palette_convert(device, steps, qp_internal_global_pixel_lookup_table)) {
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return false;
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}
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}
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return qp_internal_decode_palette(device, pixel_count, bits_per_pixel, input_callback, input_arg, qp_internal_global_pixel_lookup_table, output_callback, output_arg);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Progressive pull of bytes, push of pixels
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static inline int16_t qp_drawimage_byte_uncompressed_decoder(void* cb_arg) {
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struct qp_internal_byte_input_state* state = (struct qp_internal_byte_input_state*)cb_arg;
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state->curr = qp_stream_get(state->src_stream);
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return state->curr;
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}
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static inline int16_t qp_drawimage_byte_rle_decoder(void* cb_arg) {
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struct qp_internal_byte_input_state* state = (struct qp_internal_byte_input_state*)cb_arg;
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// Work out if we're parsing the initial marker byte
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if (state->rle.mode == MARKER_BYTE) {
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uint8_t c = qp_stream_get(state->src_stream);
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if (c >= 128) {
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state->rle.mode = NON_REPEATING_RUN; // non-repeated run
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state->rle.remain = c - 127;
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} else {
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state->rle.mode = REPEATING_RUN; // repeated run
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state->rle.remain = c;
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}
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state->curr = qp_stream_get(state->src_stream);
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}
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// Work out which byte we're returning
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uint8_t c = state->curr;
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// Decrement the counter of the bytes remaining
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state->rle.remain--;
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if (state->rle.remain > 0) {
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// If we're in a non-repeating run, queue up the next byte
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if (state->rle.mode == NON_REPEATING_RUN) {
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state->curr = qp_stream_get(state->src_stream);
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}
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} else {
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// Swap back to querying the marker byte mode
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state->rle.mode = MARKER_BYTE;
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}
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return c;
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}
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bool qp_internal_pixel_appender(qp_pixel_t* palette, uint8_t index, void* cb_arg) {
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struct qp_internal_pixel_output_state* state = (struct qp_internal_pixel_output_state*)cb_arg;
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struct painter_driver_t* driver = (struct painter_driver_t*)state->device;
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if (!driver->driver_vtable->append_pixels(state->device, qp_internal_global_pixdata_buffer, palette, state->pixel_write_pos++, 1, &index)) {
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return false;
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}
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// If we've hit the transmit limit, send out the entire buffer and reset the write position
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if (state->pixel_write_pos == state->max_pixels) {
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if (!driver->driver_vtable->pixdata(state->device, qp_internal_global_pixdata_buffer, state->pixel_write_pos)) {
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return false;
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}
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state->pixel_write_pos = 0;
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}
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return true;
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}
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qp_internal_byte_input_callback qp_internal_prepare_input_state(struct qp_internal_byte_input_state* input_state, painter_compression_t compression) {
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switch (compression) {
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case IMAGE_UNCOMPRESSED:
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return qp_drawimage_byte_uncompressed_decoder;
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case IMAGE_COMPRESSED_RLE:
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input_state->rle.mode = MARKER_BYTE;
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input_state->rle.remain = 0;
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return qp_drawimage_byte_rle_decoder;
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default:
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return NULL;
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}
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}
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