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130 lines
5.4 KiB
130 lines
5.4 KiB
// Copyright 2021 Nick Brassel (@tzarc)
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "color.h"
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#include "qp_internal.h"
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#include "qp_comms.h"
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#include "qp_draw.h"
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#include "qp_tft_panel.h"
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#define BYTE_SWAP(x) (((((uint16_t)(x)) >> 8) & 0x00FF) | ((((uint16_t)(x)) << 8) & 0xFF00))
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Native pixel format conversion
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uint16_t qp_rgb888_to_rgb565(uint8_t r, uint8_t g, uint8_t b) {
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uint16_t rgb565 = (((uint16_t)r) >> 3) << 11 | (((uint16_t)g) >> 2) << 5 | (((uint16_t)b) >> 3);
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return rgb565;
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}
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uint16_t qp_rgb888_to_rgb565_swapped(uint8_t r, uint8_t g, uint8_t b) {
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uint16_t rgb565 = (((uint16_t)r) >> 3) << 11 | (((uint16_t)g) >> 2) << 5 | (((uint16_t)b) >> 3);
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return BYTE_SWAP(rgb565);
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}
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uint16_t qp_rgb888_to_bgr565(uint8_t r, uint8_t g, uint8_t b) {
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uint16_t bgr565 = (((uint16_t)b) >> 3) << 11 | (((uint16_t)g) >> 2) << 5 | (((uint16_t)r) >> 3);
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return bgr565;
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}
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uint16_t qp_rgb888_to_bgr565_swapped(uint8_t r, uint8_t g, uint8_t b) {
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uint16_t bgr565 = (((uint16_t)b) >> 3) << 11 | (((uint16_t)g) >> 2) << 5 | (((uint16_t)r) >> 3);
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return BYTE_SWAP(bgr565);
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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// Quantum Painter API implementations
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// Power control
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bool qp_tft_panel_power(painter_device_t device, bool power_on) {
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struct painter_driver_t * driver = (struct painter_driver_t *)device;
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struct tft_panel_dc_reset_painter_driver_vtable_t *vtable = (struct tft_panel_dc_reset_painter_driver_vtable_t *)driver->driver_vtable;
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qp_comms_command(device, power_on ? vtable->opcodes.display_on : vtable->opcodes.display_off);
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return true;
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}
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// Screen clear
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bool qp_tft_panel_clear(painter_device_t device) {
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struct painter_driver_t *driver = (struct painter_driver_t *)device;
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driver->driver_vtable->init(device, driver->rotation); // Re-init the LCD
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return true;
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}
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// Screen flush
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bool qp_tft_panel_flush(painter_device_t device) {
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// No-op, as there's no framebuffer in RAM for this device.
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return true;
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}
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// Viewport to draw to
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bool qp_tft_panel_viewport(painter_device_t device, uint16_t left, uint16_t top, uint16_t right, uint16_t bottom) {
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struct painter_driver_t * driver = (struct painter_driver_t *)device;
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struct tft_panel_dc_reset_painter_driver_vtable_t *vtable = (struct tft_panel_dc_reset_painter_driver_vtable_t *)driver->driver_vtable;
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// Fix up the drawing location if required
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left += driver->offset_x;
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right += driver->offset_x;
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top += driver->offset_y;
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bottom += driver->offset_y;
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// Check if we need to manually swap the window coordinates based on whether or not we're in a sideways rotation
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if (vtable->swap_window_coords && (driver->rotation == QP_ROTATION_90 || driver->rotation == QP_ROTATION_270)) {
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uint16_t temp;
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temp = left;
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left = top;
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top = temp;
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temp = right;
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right = bottom;
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bottom = temp;
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}
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if (vtable->num_window_bytes == 1) {
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// Set up the x-window
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uint8_t xbuf[2] = {left & 0xFF, right & 0xFF};
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qp_comms_command_databuf(device, vtable->opcodes.set_column_address, xbuf, sizeof(xbuf));
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// Set up the y-window
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uint8_t ybuf[2] = {top & 0xFF, bottom & 0xFF};
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qp_comms_command_databuf(device, vtable->opcodes.set_row_address, ybuf, sizeof(ybuf));
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} else if (vtable->num_window_bytes == 2) {
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// Set up the x-window
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uint8_t xbuf[4] = {left >> 8, left & 0xFF, right >> 8, right & 0xFF};
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qp_comms_command_databuf(device, vtable->opcodes.set_column_address, xbuf, sizeof(xbuf));
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// Set up the y-window
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uint8_t ybuf[4] = {top >> 8, top & 0xFF, bottom >> 8, bottom & 0xFF};
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qp_comms_command_databuf(device, vtable->opcodes.set_row_address, ybuf, sizeof(ybuf));
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}
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// Lock in the window
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qp_comms_command(device, vtable->opcodes.enable_writes);
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return true;
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}
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// Stream pixel data to the current write position in GRAM
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bool qp_tft_panel_pixdata(painter_device_t device, const void *pixel_data, uint32_t native_pixel_count) {
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qp_comms_send(device, pixel_data, native_pixel_count * sizeof(uint16_t));
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return true;
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}
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// Convert supplied palette entries into their native equivalents
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bool qp_tft_panel_palette_convert(painter_device_t device, int16_t palette_size, qp_pixel_t *palette) {
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struct painter_driver_t * driver = (struct painter_driver_t *)device;
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struct tft_panel_dc_reset_painter_driver_vtable_t *vtable = (struct tft_panel_dc_reset_painter_driver_vtable_t *)driver->driver_vtable;
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for (int16_t i = 0; i < palette_size; ++i) {
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RGB rgb = hsv_to_rgb_nocie((HSV){palette[i].hsv888.h, palette[i].hsv888.s, palette[i].hsv888.v});
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palette[i].rgb565 = vtable->rgb888_to_native16bit(rgb.r, rgb.g, rgb.b);
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}
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return true;
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}
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// Append pixels to the target location, keyed by the pixel index
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bool qp_tft_panel_append_pixels(painter_device_t device, uint8_t *target_buffer, qp_pixel_t *palette, uint32_t pixel_offset, uint32_t pixel_count, uint8_t *palette_indices) {
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uint16_t *buf = (uint16_t *)target_buffer;
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for (uint32_t i = 0; i < pixel_count; ++i) {
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buf[pixel_offset + i] = palette[palette_indices[i]].rgb565;
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}
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return true;
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}
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