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+/****************************************************************************
+ * examples/nximage/nximage_bkgd.c
+ *
+ * Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ * Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ * used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <semaphore.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/nx.h>
+#include <nuttx/nxglib.h>
+#include <nuttx/nxfonts.h>
+
+#include "nximage.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* Select renderer -- Some additional logic would be required to support
+ * pixel depths that are not directly addressable (1,2,4, and 24).
+ */
+
+#if CONFIG_EXAMPLES_NXIMAGE_BPP == 1
+# define RENDERER nxf_convert_1bpp
+#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 2
+# define RENDERER nxf_convert_2bpp
+#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 4
+# define RENDERER nxf_convert_4bpp
+#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 8
+# define RENDERER nxf_convert_8bpp
+#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 16
+# define RENDERER nxf_convert_16bpp
+#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 24
+# define RENDERER nxf_convert_24bpp
+#elif CONFIG_EXAMPLES_NXIMAGE_BPP == 32
+# define RENDERER nxf_convert_32bpp
+#else
+# error "Unsupported CONFIG_EXAMPLES_NXIMAGE_BPP"
+#endif
+
+/* Vertical scaling */
+
+#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALEp5)
+
+/* Read two rows, output one averaged row */
+
+#define NINPUT_ROWS 2
+#define NOUTPUT_ROWS 1
+
+#elif defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5)
+/* Read two rows, output three rows */
+
+#define NINPUT_ROWS 2
+#define NOUTPUT_ROWS 3
+
+#elif defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE2p0)
+/* Read one row, output two rows */
+
+#define NINPUT_ROWS 1
+#define NOUTPUT_ROWS 2
+
+#else
+/* Read one rows, output one or two rows */
+
+#define NINPUT_ROWS 1
+#define NOUTPUT_ROWS 1
+#endif
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct nximage_run_t
+{
+ nxgl_mxpixel_t run[SCALED_WIDTH];
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+static void nximage_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
+ bool more, FAR void *arg);
+static void nximage_position(NXWINDOW hwnd, FAR const struct nxgl_size_s *size,
+ FAR const struct nxgl_point_s *pos,
+ FAR const struct nxgl_rect_s *bounds,
+ FAR void *arg);
+#ifdef CONFIG_NX_MOUSE
+static void nximage_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
+ uint8_t buttons, FAR void *arg);
+#endif
+
+#ifdef CONFIG_NX_KBD
+static void nximage_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch,
+ FAR void *arg);
+#endif
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const char g_hello[] = "Hello, World!";
+
+/* Read one or two rows, output one tow or three rows */
+
+static struct nximage_run_t g_runs[NINPUT_ROWS];
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* Background window call table */
+
+const struct nx_callback_s g_bgcb =
+{
+ nximage_redraw, /* redraw */
+ nximage_position /* position */
+#ifdef CONFIG_NX_MOUSE
+ , nximage_mousein /* mousein */
+#endif
+#ifdef CONFIG_NX_KBD
+ , nximage_kbdin /* my kbdin */
+#endif
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nximage_redraw
+ *
+ * Description:
+ * NX re-draw handler
+ *
+ ****************************************************************************/
+
+static void nximage_redraw(NXWINDOW hwnd, FAR const struct nxgl_rect_s *rect,
+ bool more, FAR void *arg)
+{
+ gvdbg("hwnd=%p rect={(%d,%d),(%d,%d)} more=%s\n",
+ hwnd, rect->pt1.x, rect->pt1.y, rect->pt2.x, rect->pt2.y,
+ more ? "true" : "false");
+}
+
+/****************************************************************************
+ * Name: nximage_position
+ *
+ * Description:
+ * NX position change handler
+ *
+ ****************************************************************************/
+
+static void nximage_position(NXWINDOW hwnd, FAR const struct nxgl_size_s *size,
+ FAR const struct nxgl_point_s *pos,
+ FAR const struct nxgl_rect_s *bounds,
+ FAR void *arg)
+{
+ /* Report the position */
+
+ gvdbg("hwnd=%p size=(%d,%d) pos=(%d,%d) bounds={(%d,%d),(%d,%d)}\n",
+ hwnd, size->w, size->h, pos->x, pos->y,
+ bounds->pt1.x, bounds->pt1.y, bounds->pt2.x, bounds->pt2.y);
+
+ /* Have we picked off the window bounds yet? */
+
+ if (!g_nximage.havepos)
+ {
+ /* Save the background window handle */
+
+ g_nximage.hbkgd = hwnd;
+
+ /* Save the window limits */
+
+ g_nximage.xres = bounds->pt2.x + 1;
+ g_nximage.yres = bounds->pt2.y + 1;
+
+ g_nximage.havepos = true;
+ sem_post(&g_nximage.sem);
+ gvdbg("Have xres=%d yres=%d\n", g_nximage.xres, g_nximage.yres);
+ }
+}
+
+/****************************************************************************
+ * Name: nximage_mousein
+ *
+ * Description:
+ * NX mouse input handler
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NX_MOUSE
+static void nximage_mousein(NXWINDOW hwnd, FAR const struct nxgl_point_s *pos,
+ uint8_t buttons, FAR void *arg)
+{
+ message("nximage_mousein: hwnd=%p pos=(%d,%d) button=%02x\n",
+ hwnd, pos->x, pos->y, buttons);
+}
+#endif
+
+/****************************************************************************
+ * Name: nximage_kbdin
+ *
+ * Description:
+ * NX keyboard input handler
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_NX_KBD
+static void nximage_kbdin(NXWINDOW hwnd, uint8_t nch, FAR const uint8_t *ch,
+ FAR void *arg)
+{
+ gvdbg("hwnd=%p nch=%d\n", hwnd, nch);
+
+ /* In this example, there is no keyboard so a keyboard event is not
+ * expected.
+ */
+
+ message("nximage_kbdin: Unexpected keyboard callback\n");
+}
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nximage_image
+ *
+ * Description:
+ * Put the NuttX logo in the center of the display.
+ *
+ ****************************************************************************/
+
+void nximage_image(NXWINDOW hwnd)
+{
+ FAR const void *state = NULL;
+ FAR struct nxgl_point_s pos;
+ FAR struct nxgl_rect_s dest;
+ FAR const void *src[CONFIG_NX_NPLANES];
+ nxgl_coord_t row;
+ int ret;
+#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALEp5) || defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5)
+ int i;
+#endif
+
+ /* Center the image. Note: these may extend off the display. */
+
+ pos.x = (g_nximage.xres - SCALED_WIDTH) / 2;
+ pos.y = (g_nximage.yres - SCALED_HEIGHT) / 2;
+
+ /* Set up the invariant part of the destination bounding box */
+
+ dest.pt1.x = pos.x;
+ dest.pt2.x = pos.x + SCALED_WIDTH - 1;
+
+ /* Now output the rows */
+
+ for (row = 0; row < IMAGE_HEIGHT; row += NINPUT_ROWS)
+ {
+ /* Read input row(s) */
+
+ nximage_blitrow(g_runs[0].run, &state);
+#if NINPUT_ROWS > 1
+ nximage_blitrow(g_runs[1].run, &state);
+#endif
+
+ /* Output rows before averaging */
+
+#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5) || defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE2p0)
+
+ /* Output row[0] */
+
+ dest.pt1.y = pos.y;
+ dest.pt2.y = pos.y;
+
+ src[0] = (FAR const void *)g_runs[0].run;
+#if CONFIG_NX_NPLANES > 1
+# warning "More logic is needed for the case where CONFIG_NX_PLANES > 1"
+#endif
+ ret = nx_bitmap((NXWINDOW)hwnd, &dest, src, &pos, SCALED_WIDTH*sizeof(nxgl_mxpixel_t));
+ if (ret < 0)
+ {
+ message("nximage_image: nx_bitmapwindow failed: %d\n", errno);
+ }
+
+ /* Increment the vertical position */
+
+ pos.y++;
+#endif
+
+ /* Perform averaging */
+
+#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALEp5) || defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5)
+
+ /* Average row[0] and row[1], output results in row[0] */
+
+ for (i = 0; i < SCALED_WIDTH; i++)
+ {
+ g_runs[0].run[i] = nximage_avgcolor(g_runs[0].run[i], g_runs[1].run[i]);
+ }
+
+#endif
+
+ /* Output rows after averaging */
+
+ /* Output row[0] */
+
+ dest.pt1.y = pos.y;
+ dest.pt2.y = pos.y;
+
+ src[0] = (FAR const void *)g_runs[0].run;
+#if CONFIG_NX_NPLANES > 1
+# warning "More logic is needed for the case where CONFIG_NX_PLANES > 1"
+#endif
+ ret = nx_bitmap((NXWINDOW)hwnd, &dest, src, &pos, SCALED_WIDTH*sizeof(nxgl_mxpixel_t));
+ if (ret < 0)
+ {
+ message("nximage_image: nx_bitmapwindow failed: %d\n", errno);
+ }
+
+ /* Increment the vertical position */
+
+ pos.y++;
+
+#if defined(CONFIG_EXAMPLES_NXIMAGE_YSCALE1p5)
+
+ /* Output row[0] and row[1] */
+
+ dest.pt1.y = pos.y;
+ dest.pt2.y = pos.y;
+
+ src[0] = (FAR const void *)g_runs[1].run;
+#if CONFIG_NX_NPLANES > 1
+# warning "More logic is needed for the case where CONFIG_NX_PLANES > 1"
+#endif
+ ret = nx_bitmap((NXWINDOW)hwnd, &dest, src, &pos, SCALED_WIDTH*sizeof(nxgl_mxpixel_t));
+ if (ret < 0)
+ {
+ message("nximage_image: nx_bitmapwindow failed: %d\n", errno);
+ }
+
+ /* Increment the vertical position */
+
+ pos.y++;
+#endif
+ }
+}
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