285 lines
11 KiB
C
285 lines
11 KiB
C
// Copyright 2022 Nick Brassel (@tzarc)
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
#include "color.h"
|
|
#include "qp_rgb565_surface.h"
|
|
#include "qp_draw.h"
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Common
|
|
|
|
// Device definition
|
|
typedef struct rgb565_surface_painter_device_t {
|
|
struct painter_driver_t base; // must be first, so it can be cast to/from the painter_device_t* type
|
|
|
|
// The target buffer
|
|
uint16_t *buffer;
|
|
|
|
// Manually manage the viewport for streaming pixel data to the display
|
|
uint16_t viewport_l;
|
|
uint16_t viewport_t;
|
|
uint16_t viewport_r;
|
|
uint16_t viewport_b;
|
|
|
|
// Current write location to the display when streaming pixel data
|
|
uint16_t pixdata_x;
|
|
uint16_t pixdata_y;
|
|
|
|
// Maintain a dirty region so we can stream only what we need
|
|
bool is_dirty;
|
|
uint16_t dirty_l;
|
|
uint16_t dirty_t;
|
|
uint16_t dirty_r;
|
|
uint16_t dirty_b;
|
|
|
|
} rgb565_surface_painter_device_t;
|
|
|
|
// Driver storage
|
|
rgb565_surface_painter_device_t surface_drivers[RGB565_SURFACE_NUM_DEVICES] = {0};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Helpers
|
|
|
|
static inline void increment_pixdata_location(rgb565_surface_painter_device_t *surface) {
|
|
// Increment the X-position
|
|
surface->pixdata_x++;
|
|
|
|
// If the x-coord has gone past the right-side edge, loop it back around and increment the y-coord
|
|
if (surface->pixdata_x > surface->viewport_r) {
|
|
surface->pixdata_x = surface->viewport_l;
|
|
surface->pixdata_y++;
|
|
}
|
|
|
|
// If the y-coord has gone past the bottom, loop it back to the top
|
|
if (surface->pixdata_y > surface->viewport_b) {
|
|
surface->pixdata_y = surface->viewport_t;
|
|
}
|
|
}
|
|
|
|
static inline void setpixel(rgb565_surface_painter_device_t *surface, uint16_t x, uint16_t y, uint16_t rgb565) {
|
|
// Skip messing with the dirty info if the original value already matches
|
|
if (surface->buffer[y * surface->base.panel_width + x] != rgb565) {
|
|
// Maintain dirty region
|
|
if (surface->dirty_l > x) {
|
|
surface->dirty_l = x;
|
|
}
|
|
if (surface->dirty_r < x) {
|
|
surface->dirty_r = x;
|
|
}
|
|
if (surface->dirty_t > y) {
|
|
surface->dirty_t = y;
|
|
}
|
|
if (surface->dirty_b < y) {
|
|
surface->dirty_b = y;
|
|
}
|
|
|
|
// Always dirty after a setpixel
|
|
surface->is_dirty = true;
|
|
|
|
// Update the pixel data in the buffer
|
|
surface->buffer[y * surface->base.panel_width + x] = rgb565;
|
|
}
|
|
}
|
|
|
|
static inline void append_pixel(rgb565_surface_painter_device_t *surface, uint16_t rgb565) {
|
|
setpixel(surface, surface->pixdata_x, surface->pixdata_y, rgb565);
|
|
increment_pixdata_location(surface);
|
|
}
|
|
|
|
static inline void stream_pixdata(rgb565_surface_painter_device_t *surface, const uint16_t *data, uint32_t native_pixel_count) {
|
|
for (uint32_t pixel_counter = 0; pixel_counter < native_pixel_count; ++pixel_counter) {
|
|
append_pixel(surface, data[pixel_counter]);
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Driver vtable
|
|
|
|
static bool qp_rgb565_surface_init(painter_device_t device, painter_rotation_t rotation) {
|
|
struct painter_driver_t * driver = (struct painter_driver_t *)device;
|
|
rgb565_surface_painter_device_t *surface = (rgb565_surface_painter_device_t *)driver;
|
|
memset(surface->buffer, 0, driver->panel_width * driver->panel_height * driver->native_bits_per_pixel / 8);
|
|
return true;
|
|
}
|
|
|
|
static bool qp_rgb565_surface_power(painter_device_t device, bool power_on) {
|
|
// No-op.
|
|
return true;
|
|
}
|
|
|
|
static bool qp_rgb565_surface_clear(painter_device_t device) {
|
|
struct painter_driver_t *driver = (struct painter_driver_t *)device;
|
|
driver->driver_vtable->init(device, driver->rotation); // Re-init the surface
|
|
return true;
|
|
}
|
|
|
|
static bool qp_rgb565_surface_flush(painter_device_t device) {
|
|
struct painter_driver_t * driver = (struct painter_driver_t *)device;
|
|
rgb565_surface_painter_device_t *surface = (rgb565_surface_painter_device_t *)driver;
|
|
surface->dirty_l = surface->dirty_t = UINT16_MAX;
|
|
surface->dirty_r = surface->dirty_b = 0;
|
|
surface->is_dirty = false;
|
|
return true;
|
|
}
|
|
|
|
static bool qp_rgb565_surface_viewport(painter_device_t device, uint16_t left, uint16_t top, uint16_t right, uint16_t bottom) {
|
|
struct painter_driver_t * driver = (struct painter_driver_t *)device;
|
|
rgb565_surface_painter_device_t *surface = (rgb565_surface_painter_device_t *)driver;
|
|
|
|
// Set the viewport locations
|
|
surface->viewport_l = left;
|
|
surface->viewport_t = top;
|
|
surface->viewport_r = right;
|
|
surface->viewport_b = bottom;
|
|
|
|
// Reset the write location to the top left
|
|
surface->pixdata_x = left;
|
|
surface->pixdata_y = top;
|
|
return true;
|
|
}
|
|
|
|
// Stream pixel data to the current write position in GRAM
|
|
static bool qp_rgb565_surface_pixdata(painter_device_t device, const void *pixel_data, uint32_t native_pixel_count) {
|
|
struct painter_driver_t * driver = (struct painter_driver_t *)device;
|
|
rgb565_surface_painter_device_t *surface = (rgb565_surface_painter_device_t *)driver;
|
|
stream_pixdata(surface, (const uint16_t *)pixel_data, native_pixel_count);
|
|
return true;
|
|
}
|
|
|
|
// Pixel colour conversion
|
|
static bool qp_rgb565_surface_palette_convert_rgb565_swapped(painter_device_t device, int16_t palette_size, qp_pixel_t *palette) {
|
|
for (int16_t i = 0; i < palette_size; ++i) {
|
|
RGB rgb = hsv_to_rgb_nocie((HSV){palette[i].hsv888.h, palette[i].hsv888.s, palette[i].hsv888.v});
|
|
uint16_t rgb565 = (((uint16_t)rgb.r) >> 3) << 11 | (((uint16_t)rgb.g) >> 2) << 5 | (((uint16_t)rgb.b) >> 3);
|
|
palette[i].rgb565 = __builtin_bswap16(rgb565);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Append pixels to the target location, keyed by the pixel index
|
|
static bool qp_rgb565_surface_append_pixels_rgb565(painter_device_t device, uint8_t *target_buffer, qp_pixel_t *palette, uint32_t pixel_offset, uint32_t pixel_count, uint8_t *palette_indices) {
|
|
uint16_t *buf = (uint16_t *)target_buffer;
|
|
for (uint32_t i = 0; i < pixel_count; ++i) {
|
|
buf[pixel_offset + i] = palette[palette_indices[i]].rgb565;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
// Append data to the target location
|
|
static bool qp_rgb565_surface_append_pixdata(painter_device_t device, uint8_t *target_buffer, uint32_t pixdata_offset, uint8_t pixdata_byte) {
|
|
target_buffer[pixdata_offset] = pixdata_byte;
|
|
return true;
|
|
}
|
|
|
|
const struct painter_driver_vtable_t rgb565_surface_driver_vtable = {
|
|
.init = qp_rgb565_surface_init,
|
|
.power = qp_rgb565_surface_power,
|
|
.clear = qp_rgb565_surface_clear,
|
|
.flush = qp_rgb565_surface_flush,
|
|
.pixdata = qp_rgb565_surface_pixdata,
|
|
.viewport = qp_rgb565_surface_viewport,
|
|
.palette_convert = qp_rgb565_surface_palette_convert_rgb565_swapped,
|
|
.append_pixels = qp_rgb565_surface_append_pixels_rgb565,
|
|
.append_pixdata = qp_rgb565_surface_append_pixdata,
|
|
};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Comms vtable
|
|
|
|
static bool qp_rgb565_surface_comms_init(painter_device_t device) {
|
|
// No-op.
|
|
return true;
|
|
}
|
|
static bool qp_rgb565_surface_comms_start(painter_device_t device) {
|
|
// No-op.
|
|
return true;
|
|
}
|
|
static void qp_rgb565_surface_comms_stop(painter_device_t device) {
|
|
// No-op.
|
|
}
|
|
uint32_t qp_rgb565_surface_comms_send(painter_device_t device, const void *data, uint32_t byte_count) {
|
|
// No-op.
|
|
return byte_count;
|
|
}
|
|
|
|
struct painter_comms_vtable_t rgb565_surface_driver_comms_vtable = {
|
|
// These are all effective no-op's because they're not actually needed.
|
|
.comms_init = qp_rgb565_surface_comms_init,
|
|
.comms_start = qp_rgb565_surface_comms_start,
|
|
.comms_stop = qp_rgb565_surface_comms_stop,
|
|
.comms_send = qp_rgb565_surface_comms_send};
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Factory function for creating a handle to an rgb565 surface
|
|
|
|
painter_device_t qp_rgb565_make_surface(uint16_t panel_width, uint16_t panel_height, void *buffer) {
|
|
for (uint32_t i = 0; i < RGB565_SURFACE_NUM_DEVICES; ++i) {
|
|
rgb565_surface_painter_device_t *driver = &surface_drivers[i];
|
|
if (!driver->base.driver_vtable) {
|
|
driver->base.driver_vtable = &rgb565_surface_driver_vtable;
|
|
driver->base.comms_vtable = &rgb565_surface_driver_comms_vtable;
|
|
driver->base.native_bits_per_pixel = 16; // RGB565
|
|
driver->base.panel_width = panel_width;
|
|
driver->base.panel_height = panel_height;
|
|
driver->base.rotation = QP_ROTATION_0;
|
|
driver->base.offset_x = 0;
|
|
driver->base.offset_y = 0;
|
|
driver->buffer = (uint16_t *)buffer;
|
|
return (painter_device_t)driver;
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
// Drawing routine to copy out the dirty region and send it to another device
|
|
|
|
bool qp_rgb565_surface_draw(painter_device_t surface, painter_device_t display, uint16_t x, uint16_t y) {
|
|
struct painter_driver_t * surface_driver = (struct painter_driver_t *)surface;
|
|
rgb565_surface_painter_device_t *surface_handle = (rgb565_surface_painter_device_t *)surface_driver;
|
|
|
|
// If we're not dirty... we're done.
|
|
if (!surface_handle->is_dirty) {
|
|
return true;
|
|
}
|
|
|
|
// Set the target drawing area
|
|
bool ok = qp_viewport(display, x + surface_handle->dirty_l, y + surface_handle->dirty_t, x + surface_handle->dirty_r, y + surface_handle->dirty_b);
|
|
if (!ok) {
|
|
return false;
|
|
}
|
|
|
|
// Housekeeping of the amount of pixels to transfer
|
|
uint32_t total_pixel_count = QUANTUM_PAINTER_PIXDATA_BUFFER_SIZE / sizeof(uint16_t);
|
|
uint32_t pixel_counter = 0;
|
|
uint16_t *target_buffer = (uint16_t *)qp_internal_global_pixdata_buffer;
|
|
|
|
// Fill the global pixdata area so that we can start transferring to the panel
|
|
for (uint16_t y = surface_handle->dirty_t; y <= surface_handle->dirty_b; ++y) {
|
|
for (uint16_t x = surface_handle->dirty_l; x <= surface_handle->dirty_r; ++x) {
|
|
// Update the target buffer
|
|
target_buffer[pixel_counter++] = surface_handle->buffer[y * surface_handle->base.panel_width + x];
|
|
|
|
// If we've accumulated enough data, send it
|
|
if (pixel_counter == total_pixel_count) {
|
|
ok = qp_pixdata(display, qp_internal_global_pixdata_buffer, pixel_counter);
|
|
if (!ok) {
|
|
return false;
|
|
}
|
|
// Reset the counter
|
|
pixel_counter = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
// If there's any leftover data, send it
|
|
if (pixel_counter > 0) {
|
|
ok = qp_pixdata(display, qp_internal_global_pixdata_buffer, pixel_counter);
|
|
if (!ok) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Clear the dirty info for the surface
|
|
return qp_flush(surface);
|
|
}
|