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// Copyright 2022 Nick Brassel (@tzarc)
// SPDX-License-Identifier: GPL-2.0-or-later
#include "color.h"
#include "qp_draw.h"
#include "qp_surface_internal.h"
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Driver storage
surface_painter_device_t surface_drivers[SURFACE_NUM_DEVICES] = {0};
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Helpers
void qp_surface_increment_pixdata_location(surface_viewport_data_t *viewport) {
// Increment the X-position
viewport->pixdata_x++;
// If the x-coord has gone past the right-side edge, loop it back around and increment the y-coord
if (viewport->pixdata_x > viewport->viewport_r) {
viewport->pixdata_x = viewport->viewport_l;
viewport->pixdata_y++;
}
// If the y-coord has gone past the bottom, loop it back to the top
if (viewport->pixdata_y > viewport->viewport_b) {
viewport->pixdata_y = viewport->viewport_t;
}
}
void qp_surface_update_dirty(surface_dirty_data_t *dirty, uint16_t x, uint16_t y) {
// Maintain dirty region
if (dirty->l > x) {
dirty->l = x;
dirty->is_dirty = true;
}
if (dirty->r < x) {
dirty->r = x;
dirty->is_dirty = true;
}
if (dirty->t > y) {
dirty->t = y;
dirty->is_dirty = true;
}
if (dirty->b < y) {
dirty->b = y;
dirty->is_dirty = true;
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Driver vtable
bool qp_surface_init(painter_device_t device, painter_rotation_t rotation) {
painter_driver_t * driver = (painter_driver_t *)device;
surface_painter_device_t *surface = (surface_painter_device_t *)driver;
memset(surface->buffer, 0, SURFACE_REQUIRED_BUFFER_BYTE_SIZE(driver->panel_width, driver->panel_height, driver->native_bits_per_pixel));
surface->dirty.l = 0;
surface->dirty.t = 0;
surface->dirty.r = surface->base.panel_width - 1;
surface->dirty.b = surface->base.panel_height - 1;
surface->dirty.is_dirty = true;
return true;
}
bool qp_surface_power(painter_device_t device, bool power_on) {
// No-op.
return true;
}
bool qp_surface_clear(painter_device_t device) {
painter_driver_t *driver = (painter_driver_t *)device;
driver->driver_vtable->init(device, driver->rotation); // Re-init the surface
return true;
}
bool qp_surface_flush(painter_device_t device) {
painter_driver_t * driver = (painter_driver_t *)device;
surface_painter_device_t *surface = (surface_painter_device_t *)driver;
surface->dirty.l = surface->dirty.t = UINT16_MAX;
surface->dirty.r = surface->dirty.b = 0;
surface->dirty.is_dirty = false;
return true;
}
bool qp_surface_viewport(painter_device_t device, uint16_t left, uint16_t top, uint16_t right, uint16_t bottom) {
painter_driver_t * driver = (painter_driver_t *)device;
surface_painter_device_t *surface = (surface_painter_device_t *)driver;
// Set the viewport locations
surface->viewport.viewport_l = left;
surface->viewport.viewport_t = top;
surface->viewport.viewport_r = right;
surface->viewport.viewport_b = bottom;
// Reset the write location to the top left
surface->viewport.pixdata_x = left;
surface->viewport.pixdata_y = top;
return true;
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Drawing routine to copy out the dirty region and send it to another device
bool qp_surface_draw(painter_device_t surface, painter_device_t target, uint16_t x, uint16_t y, bool entire_surface) {
painter_driver_t * surface_driver = (painter_driver_t *)surface;
surface_painter_device_t *surface_handle = (surface_painter_device_t *)surface_driver;
painter_driver_t * target_driver = (painter_driver_t *)target;
// If we're not dirty... we're done.
if (!surface_handle->dirty.is_dirty) {
qp_dprintf("qp_surface_draw: ok (not dirty, skipping)\n");
return true;
}
// If we have incompatible bit depths, drop out
if (surface_driver->native_bits_per_pixel != target_driver->native_bits_per_pixel) {
qp_dprintf("qp_surface_draw: fail (incompatible bpp: surface=%d, target=%d)\n", (int)surface_driver->native_bits_per_pixel, (int)target_driver->native_bits_per_pixel);
return false;
}
// Offload to the pixdata transfer function
surface_painter_driver_vtable_t *vtable = (surface_painter_driver_vtable_t *)surface_driver->driver_vtable;
bool ok = vtable->target_pixdata_transfer(surface_driver, target_driver, x, y, entire_surface);
if (!ok) {
qp_dprintf("qp_surface_draw: fail (could not transfer pixel data)\n");
return false;
}
// Clear the dirty info for the surface
ok = qp_flush(surface);
if (!ok) {
qp_dprintf("qp_surface_draw: fail (could not flush)\n");
return false;
}
qp_dprintf("qp_surface_draw: ok\n");
return true;
}
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