464 lines
21 KiB
C
464 lines
21 KiB
C
// Copyright 2021 Nick Brassel (@tzarc)
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <quantum.h>
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#include <utf8.h>
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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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#include "qff.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// QFF font handles
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typedef struct qff_font_handle_t {
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painter_font_desc_t base;
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bool validate_ok;
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bool has_ascii_table;
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uint16_t num_unicode_glyphs;
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uint8_t bpp;
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bool has_palette;
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painter_compression_t compression_scheme;
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union {
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qp_stream_t stream;
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qp_memory_stream_t mem_stream;
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#ifdef QP_STREAM_HAS_FILE_IO
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qp_file_stream_t file_stream;
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#endif // QP_STREAM_HAS_FILE_IO
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};
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#if QUANTUM_PAINTER_LOAD_FONTS_TO_RAM
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bool owns_buffer;
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void *buffer;
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#endif // QUANTUM_PAINTER_LOAD_FONTS_TO_RAM
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} qff_font_handle_t;
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static qff_font_handle_t font_descriptors[QUANTUM_PAINTER_NUM_FONTS] = {0};
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Helper: load font from stream
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static painter_font_handle_t qp_load_font_internal(bool (*stream_factory)(qff_font_handle_t *font, void *arg), void *arg) {
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qp_dprintf("qp_load_font: entry\n");
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qff_font_handle_t *font = NULL;
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// Find a free slot
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for (int i = 0; i < QUANTUM_PAINTER_NUM_FONTS; ++i) {
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if (!font_descriptors[i].validate_ok) {
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font = &font_descriptors[i];
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break;
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}
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}
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// Drop out if not found
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if (!font) {
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qp_dprintf("qp_load_font: fail (no free slot)\n");
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return NULL;
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}
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if (!stream_factory(font, arg)) {
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qp_dprintf("qp_load_font: fail (could not create stream)\n");
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return NULL;
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}
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// Now that we know the length, validate the input data
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if (!qff_validate_stream(&font->stream)) {
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qp_dprintf("qp_load_font: fail (failed validation)\n");
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return NULL;
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}
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#if QUANTUM_PAINTER_LOAD_FONTS_TO_RAM
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// Clear out any existing data
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font->owns_buffer = false;
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font->buffer = NULL;
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void *ram_buffer = malloc(font->mem_stream.length);
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if (ram_buffer == NULL) {
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qp_dprintf("qp_load_font: could not allocate enough RAM for font, falling back to original\n");
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} else {
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do {
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// Copy the data into RAM
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if (qp_stream_read(ram_buffer, 1, font->mem_stream.length, &font->mem_stream) != font->mem_stream.length) {
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qp_dprintf("qp_load_font: could not copy from flash to RAM, falling back to original\n");
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break;
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}
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// Create the new stream with the new buffer
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font->buffer = ram_buffer;
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font->owns_buffer = true;
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font->mem_stream = qp_make_memory_stream(font->buffer, font->mem_stream.length);
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} while (0);
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}
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// Free the buffer if we were unable to recreate the RAM copy.
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if (ram_buffer != NULL && !font->owns_buffer) {
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free(ram_buffer);
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}
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#endif // QUANTUM_PAINTER_LOAD_FONTS_TO_RAM
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// Read the info (parsing already successful above, no need to check return value)
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qff_read_font_descriptor(&font->stream, &font->base.line_height, &font->has_ascii_table, &font->num_unicode_glyphs, &font->bpp, &font->has_palette, &font->compression_scheme, NULL);
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if (!qp_internal_bpp_capable(font->bpp)) {
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qp_dprintf("qp_load_font: fail (image bpp too high (%d), check QUANTUM_PAINTER_SUPPORTS_256_PALETTE or QUANTUM_PAINTER_SUPPORTS_NATIVE_COLORS)\n", (int)font->bpp);
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qp_close_font((painter_font_handle_t)font);
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return NULL;
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}
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// Validation success, we can return the handle
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font->validate_ok = true;
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qp_dprintf("qp_load_font: ok\n");
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return (painter_font_handle_t)font;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Quantum Painter External API: qp_load_font_mem
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static inline bool font_mem_stream_factory(qff_font_handle_t *font, void *arg) {
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void *buffer = arg;
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// Assume we can read the graphics descriptor
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font->mem_stream = qp_make_memory_stream(buffer, sizeof(qff_font_descriptor_v1_t));
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// Update the length of the stream to match, and rewind to the start
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font->mem_stream.length = qff_get_total_size(&font->stream);
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font->mem_stream.position = 0;
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return true;
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}
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painter_font_handle_t qp_load_font_mem(const void *buffer) {
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return qp_load_font_internal(font_mem_stream_factory, (void *)buffer);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Quantum Painter External API: qp_close_font
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bool qp_close_font(painter_font_handle_t font) {
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qff_font_handle_t *qff_font = (qff_font_handle_t *)font;
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if (!qff_font->validate_ok) {
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qp_dprintf("qp_close_font: fail (invalid font)\n");
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return false;
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}
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#if QUANTUM_PAINTER_LOAD_FONTS_TO_RAM
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// Nuke the buffer, if required
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if (qff_font->owns_buffer) {
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free(qff_font->buffer);
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qff_font->buffer = NULL;
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qff_font->owns_buffer = false;
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}
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#endif // QUANTUM_PAINTER_LOAD_FONTS_TO_RAM
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// Free up this font for use elsewhere.
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qp_stream_close(&qff_font->stream);
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qff_font->validate_ok = false;
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Helpers
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// Callback to be invoked for each codepoint detected in the UTF8 input string
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typedef bool (*code_point_handler)(qff_font_handle_t *qff_font, uint32_t code_point, uint8_t width, uint8_t height, void *cb_arg);
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// Helper that sets up the palette (if required) and returns the offset in the stream that the data starts
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static inline bool qp_drawtext_prepare_font_for_render(painter_device_t device, qff_font_handle_t *qff_font, qp_pixel_t fg_hsv888, qp_pixel_t bg_hsv888, uint32_t *data_offset) {
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struct painter_driver_t *driver = (struct painter_driver_t *)device;
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// Drop out if we can't actually place the data we read out anywhere
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if (!data_offset) {
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qp_dprintf("Failed to prepare stream for read, output info buffer unavailable\n");
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return false;
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}
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// Work out where we're reading from
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uint32_t offset = sizeof(qff_font_descriptor_v1_t);
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if (qff_font->has_ascii_table) {
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offset += sizeof(qff_ascii_glyph_table_v1_t);
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}
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if (qff_font->num_unicode_glyphs > 0) {
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offset += sizeof(qff_unicode_glyph_table_v1_t) + (qff_font->num_unicode_glyphs * 6);
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}
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// Handle palette if needed
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const uint16_t palette_entries = 1u << qff_font->bpp;
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bool needs_pixconvert = false;
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if (qff_font->has_palette) {
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// If this font has a palette, we need to read it out and set up the pixel lookup table
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qp_stream_setpos(&qff_font->stream, offset);
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if (!qp_internal_load_qgf_palette(&qff_font->stream, qff_font->bpp)) {
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return false;
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}
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// Skip this block, as far as offset calculations go
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offset += sizeof(qgf_palette_v1_t) + (palette_entries * 3);
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needs_pixconvert = true;
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} else {
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// Interpolate from fg/bg
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int16_t palette_entries = 1 << qff_font->bpp;
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needs_pixconvert = qp_internal_interpolate_palette(fg_hsv888, bg_hsv888, palette_entries);
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}
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if (needs_pixconvert) {
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// Convert the palette to native format
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if (!driver->driver_vtable->palette_convert(device, palette_entries, qp_internal_global_pixel_lookup_table)) {
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qp_dprintf("qp_drawtext_recolor: fail (could not convert pixels to native)\n");
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qp_comms_stop(device);
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return false;
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}
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}
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*data_offset = offset;
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return true;
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}
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static inline bool qp_drawtext_prepare_glyph_for_render(qff_font_handle_t *qff_font, uint32_t code_point, uint8_t *width) {
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if (code_point >= 0x20 && code_point < 0x7F && qff_font->has_ascii_table) {
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// Do ascii table
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qff_ascii_glyph_v1_t glyph_info;
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uint32_t glyph_info_offset = sizeof(qff_font_descriptor_v1_t) // Skip the font descriptor
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+ sizeof(qgf_block_header_v1_t) // Skip the ascii table header
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+ (code_point - 0x20) * sizeof(qff_ascii_glyph_v1_t); // Jump direct to the data offset based on the glyph index
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if (qp_stream_setpos(&qff_font->stream, glyph_info_offset) < 0) {
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qp_dprintf("Failed to set stream position while reading ascii glyph info\n");
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return false;
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}
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if (qp_stream_read(&glyph_info, sizeof(qff_ascii_glyph_v1_t), 1, &qff_font->stream) != 1) {
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qp_dprintf("Failed to read glyph info\n");
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return false;
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}
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uint8_t glyph_width = (uint8_t)(glyph_info.value & QFF_GLYPH_WIDTH_MASK);
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uint32_t glyph_offset = ((glyph_info.value & QFF_GLYPH_OFFSET_MASK) >> QFF_GLYPH_WIDTH_BITS);
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uint32_t data_offset = sizeof(qff_font_descriptor_v1_t) // Skip the font descriptor
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+ sizeof(qff_ascii_glyph_table_v1_t) // Skip the ascii table
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+ (qff_font->num_unicode_glyphs > 0 ? (sizeof(qff_unicode_glyph_table_v1_t) + (qff_font->num_unicode_glyphs * sizeof(qff_unicode_glyph_v1_t))) : 0) // Skip the unicode table
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+ (qff_font->has_palette ? (sizeof(qgf_palette_v1_t) + ((1 << qff_font->bpp) * sizeof(qgf_palette_entry_v1_t))) : 0) // Skip the palette
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+ sizeof(qgf_block_header_v1_t) // Skip the data block header
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+ glyph_offset; // Jump to the specified glyph offset
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if (qp_stream_setpos(&qff_font->stream, data_offset) < 0) {
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qp_dprintf("Failed to set stream position while preparing ascii glyph data\n");
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return false;
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}
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*width = glyph_width;
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return true;
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} else {
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// Do unicode table, which may include singular ascii glyphs if full ascii table isn't specified
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uint32_t glyph_info_offset = sizeof(qff_font_descriptor_v1_t) // Skip the font descriptor
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+ (qff_font->has_ascii_table ? sizeof(qff_ascii_glyph_table_v1_t) : 0) // Skip the ascii table
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+ sizeof(qgf_block_header_v1_t); // Skip the unicode block header
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if (qp_stream_setpos(&qff_font->stream, glyph_info_offset) < 0) {
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qp_dprintf("Failed to set stream position while preparing glyph data\n");
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return false;
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}
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qff_unicode_glyph_v1_t glyph_info;
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for (uint16_t i = 0; i < qff_font->num_unicode_glyphs; ++i) {
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if (qp_stream_read(&glyph_info, sizeof(qff_unicode_glyph_v1_t), 1, &qff_font->stream) != 1) {
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qp_dprintf("Failed to set stream position while reading unicode glyph info\n");
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return false;
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}
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if (glyph_info.code_point == code_point) {
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uint8_t glyph_width = (uint8_t)(glyph_info.value & QFF_GLYPH_WIDTH_MASK);
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uint32_t glyph_offset = ((glyph_info.value & QFF_GLYPH_OFFSET_MASK) >> QFF_GLYPH_WIDTH_BITS);
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uint32_t data_offset = sizeof(qff_font_descriptor_v1_t) // Skip the font descriptor
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+ sizeof(qff_ascii_glyph_table_v1_t) // Skip the ascii table
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+ (qff_font->num_unicode_glyphs > 0 ? (sizeof(qff_unicode_glyph_table_v1_t) + (qff_font->num_unicode_glyphs * sizeof(qff_unicode_glyph_v1_t))) : 0) // Skip the unicode table
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+ (qff_font->has_palette ? (sizeof(qgf_palette_v1_t) + ((1 << qff_font->bpp) * sizeof(qgf_palette_entry_v1_t))) : 0) // Skip the palette
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+ sizeof(qgf_block_header_v1_t) // Skip the data block header
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+ glyph_offset; // Jump to the specified glyph offset
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if (qp_stream_setpos(&qff_font->stream, data_offset) < 0) {
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qp_dprintf("Failed to set stream position while preparing unicode glyph data\n");
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return false;
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}
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*width = glyph_width;
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return true;
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}
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}
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// Not found
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qp_dprintf("Failed to find unicode glyph info\n");
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return false;
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}
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return false;
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}
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// Function to iterate over each UTF8 codepoint, invoking the callback for each decoded glyph
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static inline bool qp_iterate_code_points(qff_font_handle_t *qff_font, const char *str, code_point_handler handler, void *cb_arg) {
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while (*str) {
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int32_t code_point = 0;
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str = decode_utf8(str, &code_point);
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if (code_point < 0) {
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qp_dprintf("Invalid unicode code point decoded. Cannot render.\n");
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return false;
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}
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uint8_t width;
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if (!qp_drawtext_prepare_glyph_for_render(qff_font, code_point, &width)) {
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qp_dprintf("Failed to prepare glyph for rendering.\n");
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return false;
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}
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if (!handler(qff_font, code_point, width, qff_font->base.line_height, cb_arg)) {
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qp_dprintf("Failed to execute glyph handler.\n");
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return false;
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}
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}
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// String width calculation
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// Callback state
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struct code_point_iter_calcwidth_state {
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int16_t width;
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};
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// Codepoint handler callback: width calc
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static inline bool qp_font_code_point_handler_calcwidth(qff_font_handle_t *qff_font, uint32_t code_point, uint8_t width, uint8_t height, void *cb_arg) {
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struct code_point_iter_calcwidth_state *state = (struct code_point_iter_calcwidth_state *)cb_arg;
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// Increment the overall width by this glyph's width
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state->width += width;
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// String drawing implementation
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// Callback state
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struct code_point_iter_drawglyph_state {
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painter_device_t device;
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int16_t xpos;
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int16_t ypos;
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qp_internal_byte_input_callback input_callback;
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struct qp_internal_byte_input_state * input_state;
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struct qp_internal_pixel_output_state *output_state;
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};
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// Codepoint handler callback: drawing
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static inline bool qp_font_code_point_handler_drawglyph(qff_font_handle_t *qff_font, uint32_t code_point, uint8_t width, uint8_t height, void *cb_arg) {
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struct code_point_iter_drawglyph_state *state = (struct code_point_iter_drawglyph_state *)cb_arg;
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struct painter_driver_t * driver = (struct painter_driver_t *)state->device;
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// Reset the input state's RLE mode -- the stream should already be correctly positioned by qp_iterate_code_points()
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state->input_state->rle.mode = MARKER_BYTE; // ignored if not using RLE
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// Reset the output state
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state->output_state->pixel_write_pos = 0;
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// Configure where we're going to be rendering to
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driver->driver_vtable->viewport(state->device, state->xpos, state->ypos, state->xpos + width - 1, state->ypos + height - 1);
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// Move the x-position for the next glyph
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state->xpos += width;
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// Decode the pixel data for the glyph
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uint32_t pixel_count = ((uint32_t)width) * height;
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bool ret = qp_internal_decode_palette(state->device, pixel_count, qff_font->bpp, state->input_callback, state->input_state, qp_internal_global_pixel_lookup_table, qp_internal_pixel_appender, state->output_state);
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// Any leftovers need transmission as well.
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if (ret && state->output_state->pixel_write_pos > 0) {
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ret &= driver->driver_vtable->pixdata(state->device, qp_internal_global_pixdata_buffer, state->output_state->pixel_write_pos);
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}
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return ret;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Quantum Painter External API: qp_textwidth
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int16_t qp_textwidth(painter_font_handle_t font, const char *str) {
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qff_font_handle_t *qff_font = (qff_font_handle_t *)font;
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if (!qff_font->validate_ok) {
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qp_dprintf("qp_textwidth: fail (invalid font)\n");
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return false;
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}
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// Create the codepoint iterator state
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struct code_point_iter_calcwidth_state state = {.width = 0};
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// Iterate each codepoint, return the calculated width if successful.
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return qp_iterate_code_points(qff_font, str, qp_font_code_point_handler_calcwidth, &state) ? state.width : 0;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Quantum Painter External API: qp_drawtext
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int16_t qp_drawtext(painter_device_t device, uint16_t x, uint16_t y, painter_font_handle_t font, const char *str) {
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// Offload to the recolor variant, substituting fg=white bg=black.
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// Traditional LCDs with those colors will need to manually invoke qp_drawtext_recolor with the colors reversed.
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return qp_drawtext_recolor(device, x, y, font, str, 0, 0, 255, 0, 0, 0);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Quantum Painter External API: qp_drawtext_recolor
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int16_t qp_drawtext_recolor(painter_device_t device, uint16_t x, uint16_t y, painter_font_handle_t font, const char *str, uint8_t hue_fg, uint8_t sat_fg, uint8_t val_fg, uint8_t hue_bg, uint8_t sat_bg, uint8_t val_bg) {
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qp_dprintf("qp_drawtext_recolor: entry\n");
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struct painter_driver_t *driver = (struct painter_driver_t *)device;
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if (!driver->validate_ok) {
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qp_dprintf("qp_drawtext_recolor: fail (validation_ok == false)\n");
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return 0;
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}
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qff_font_handle_t *qff_font = (qff_font_handle_t *)font;
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if (!qff_font->validate_ok) {
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qp_dprintf("qp_drawtext_recolor: fail (invalid font)\n");
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return false;
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}
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if (!qp_comms_start(device)) {
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qp_dprintf("qp_drawtext_recolor: fail (could not start comms)\n");
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return 0;
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|
}
|
|
|
|
// Set up the byte input state and input callback
|
|
struct qp_internal_byte_input_state input_state = {.device = device, .src_stream = &qff_font->stream};
|
|
qp_internal_byte_input_callback input_callback = qp_internal_prepare_input_state(&input_state, qff_font->compression_scheme);
|
|
if (input_callback == NULL) {
|
|
qp_dprintf("qp_drawtext_recolor: fail (invalid font compression scheme)\n");
|
|
qp_comms_stop(device);
|
|
return false;
|
|
}
|
|
|
|
// Set up the pixel output state
|
|
struct qp_internal_pixel_output_state output_state = {.device = device, .pixel_write_pos = 0, .max_pixels = qp_internal_num_pixels_in_buffer(device)};
|
|
|
|
// Set up the codepoint iteration state
|
|
struct code_point_iter_drawglyph_state state = {// Common
|
|
.device = device,
|
|
.xpos = x,
|
|
.ypos = y,
|
|
// Input
|
|
.input_callback = input_callback,
|
|
.input_state = &input_state,
|
|
// Output
|
|
.output_state = &output_state};
|
|
|
|
qp_pixel_t fg_hsv888 = {.hsv888 = {.h = hue_fg, .s = sat_fg, .v = val_fg}};
|
|
qp_pixel_t bg_hsv888 = {.hsv888 = {.h = hue_bg, .s = sat_bg, .v = val_bg}};
|
|
uint32_t data_offset;
|
|
if (!qp_drawtext_prepare_font_for_render(driver, qff_font, fg_hsv888, bg_hsv888, &data_offset)) {
|
|
qp_dprintf("qp_drawtext_recolor: fail (failed to prepare font for rendering)\n");
|
|
qp_comms_stop(device);
|
|
return false;
|
|
}
|
|
|
|
// Iterate the codepoints with the drawglyph callback
|
|
bool ret = qp_iterate_code_points(qff_font, str, qp_font_code_point_handler_drawglyph, &state);
|
|
|
|
qp_dprintf("qp_drawtext_recolor: %s\n", ret ? "ok" : "fail");
|
|
qp_comms_stop(device);
|
|
return ret ? (state.xpos - x) : 0;
|
|
}
|