diff options
Diffstat (limited to 'drivers/painter/generic/qp_surface_common.c')
-rw-r--r-- | drivers/painter/generic/qp_surface_common.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/drivers/painter/generic/qp_surface_common.c b/drivers/painter/generic/qp_surface_common.c new file mode 100644 index 0000000000..2da96c73ac --- /dev/null +++ b/drivers/painter/generic/qp_surface_common.c @@ -0,0 +1,141 @@ +// 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; +} |