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- /*
- * File : dc_buffer.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2009, RT-Thread Development Team
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rt-thread.org/license/LICENSE
- *
- * Change Logs:
- * Date Author Notes
- * 2009-10-16 Bernard first version
- */
- #include <rtgui/rtgui.h>
- #include <rtgui/dc.h>
- #include <rtgui/blit.h>
- #include <rtgui/dc_hw.h>
- #include <rtgui/color.h>
- #include <rtgui/rtgui_system.h>
- #define hw_driver (rtgui_graphic_driver_get_default())
- struct rtgui_dc_buffer
- {
- struct rtgui_dc parent;
- /* graphic context */
- rtgui_gc_t gc;
- /* width and height */
- rt_uint16_t width, height;
- rt_uint16_t pitch;
- /* blit info */
- rtgui_region_t clip;
- /* pixel data */
- rt_uint8_t* pixel;
- };
- static rt_bool_t rtgui_dc_buffer_fini(struct rtgui_dc* dc);
- static void rtgui_dc_buffer_draw_point(struct rtgui_dc* dc, int x, int y);
- static void rtgui_dc_buffer_draw_color_point(struct rtgui_dc* dc, int x, int y, rtgui_color_t color);
- static void rtgui_dc_buffer_draw_vline(struct rtgui_dc* dc, int x, int y1, int y2);
- static void rtgui_dc_buffer_draw_hline(struct rtgui_dc* dc, int x1, int x2, int y);
- static void rtgui_dc_buffer_fill_rect (struct rtgui_dc* dc, struct rtgui_rect* rect);
- static void rtgui_dc_buffer_blit_line(struct rtgui_dc* self, int x1, int x2, int y, rt_uint8_t* line_data);
- static void rtgui_dc_buffer_blit(struct rtgui_dc* self, struct rtgui_point* dc_point,
- struct rtgui_dc* dest, rtgui_rect_t* rect);
- static void rtgui_dc_buffer_set_gc (struct rtgui_dc* dc, rtgui_gc_t *gc);
- static rtgui_gc_t* rtgui_dc_buffer_get_gc(struct rtgui_dc* dc);
- static rt_bool_t rtgui_dc_buffer_get_visible(struct rtgui_dc* dc);
- static void rtgui_dc_buffer_get_rect(struct rtgui_dc* dc, rtgui_rect_t* rect);
- const static struct rtgui_dc_engine dc_buffer_engine =
- {
- rtgui_dc_buffer_draw_point,
- rtgui_dc_buffer_draw_color_point,
- rtgui_dc_buffer_draw_vline,
- rtgui_dc_buffer_draw_hline,
- rtgui_dc_buffer_fill_rect,
- rtgui_dc_buffer_blit_line,
- rtgui_dc_buffer_blit,
- rtgui_dc_buffer_set_gc,
- rtgui_dc_buffer_get_gc,
- rtgui_dc_buffer_get_visible,
- rtgui_dc_buffer_get_rect,
- rtgui_dc_buffer_fini,
- };
- struct rtgui_dc* rtgui_dc_buffer_create(int w, int h)
- {
- struct rtgui_dc_buffer* dc;
- dc = (struct rtgui_dc_buffer*)rtgui_malloc(sizeof(struct rtgui_dc_buffer));
- dc->parent.type = RTGUI_DC_BUFFER;
- dc->parent.engine = &dc_buffer_engine;
- dc->gc.foreground = default_foreground;
- dc->gc.background = default_background;
- dc->gc.font = rtgui_font_default();
- dc->gc.textalign = RTGUI_ALIGN_LEFT | RTGUI_ALIGN_TOP;
- dc->width = w;
- dc->height = h;
- dc->pitch = w * sizeof(rtgui_color_t);
- rtgui_region_init(&(dc->clip));
- dc->pixel = rtgui_malloc(h * dc->pitch);
- rt_memset(dc->pixel, 0, h * dc->pitch);
- return &(dc->parent);
- }
- rt_uint8_t* rtgui_dc_buffer_get_pixel(struct rtgui_dc* dc)
- {
- struct rtgui_dc_buffer* dc_buffer;
- dc_buffer = (struct rtgui_dc_buffer*)dc;
- return dc_buffer->pixel;
- }
- static rt_bool_t rtgui_dc_buffer_fini(struct rtgui_dc* dc)
- {
- struct rtgui_dc_buffer* buffer = (struct rtgui_dc_buffer*)dc;
- if (dc->type != RTGUI_DC_BUFFER) return RT_FALSE;
- rtgui_free(buffer->pixel);
- buffer->pixel = RT_NULL;
- return RT_TRUE;
- }
- static void rtgui_dc_buffer_draw_point(struct rtgui_dc* self, int x, int y)
- {
- rtgui_color_t* ptr;
- struct rtgui_dc_buffer* dc;
- dc = (struct rtgui_dc_buffer*)self;
- /* note: there is no parameter check in this function */
- ptr = (rtgui_color_t*)(dc->pixel + y * dc->pitch + x * sizeof(rtgui_color_t));
- *ptr = dc->gc.foreground;
- }
- static void rtgui_dc_buffer_draw_color_point(struct rtgui_dc* self, int x, int y, rtgui_color_t color)
- {
- rtgui_color_t* ptr;
- struct rtgui_dc_buffer* dc;
- dc = (struct rtgui_dc_buffer*)self;
- /* note: there is no parameter check in this function */
- ptr = (rtgui_color_t*)(dc->pixel + y * dc->pitch + x * sizeof(rtgui_color_t));
- *ptr = color;
- }
- static void rtgui_dc_buffer_draw_vline(struct rtgui_dc* self, int x, int y1, int y2)
- {
- rtgui_color_t* ptr;
- register rt_base_t index;
- struct rtgui_dc_buffer* dc;
- dc = (struct rtgui_dc_buffer*)self;
- if (x >= dc->width) return;
- if (y1 > dc->height) y1 = dc->height;
- if (y2 > dc->height) y2 = dc->height;
- ptr = (rtgui_color_t*)(dc->pixel + y1 * dc->pitch + x * sizeof(rtgui_color_t));
- for (index = y1; index < y2; index ++)
- {
- /* draw this point */
- *ptr = dc->gc.foreground;
- ptr += dc->width;
- }
- }
- static void rtgui_dc_buffer_draw_hline(struct rtgui_dc* self, int x1, int x2, int y)
- {
- rtgui_color_t* ptr;
- register rt_base_t index;
- struct rtgui_dc_buffer* dc;
- dc = (struct rtgui_dc_buffer*)self;
- if (y >= dc->height) return;
- if (x1 > dc->width) x1 = dc->width;
- if (x2 > dc->width) x2 = dc->width;
- ptr = (rtgui_color_t*)(dc->pixel + y * dc->pitch + x1 * sizeof(rtgui_color_t));
- for (index = x1; index < x2; index ++)
- {
- /* draw this point */
- *ptr++ = dc->gc.foreground;
- }
- }
- static void rtgui_dc_buffer_fill_rect (struct rtgui_dc* self, struct rtgui_rect* rect)
- {
- rtgui_rect_t r;
- struct rtgui_dc_buffer* dc;
- r = *rect;
- dc = (struct rtgui_dc_buffer*)self;
- if (r.x1 > dc->width) r.x1 = dc->width;
- if (r.x2 > dc->width) r.x2 = dc->width;
- if (r.y1 > dc->height) r.y1 = dc->height;
- if (r.y2 > dc->height) r.y2 = dc->height;
- /* fill first line */
- rtgui_dc_buffer_draw_hline(&(dc->parent), r.x1, r.x2, r.y1);
- /* memory copy other lines */
- if (r.y2 > r.y1)
- {
- register rt_base_t index;
- for (index = r.y1 + 1; index < r.y2; index ++)
- {
- rt_memcpy(dc->pixel + index * dc->pitch,
- dc->pixel + r.y1 * dc->pitch,
- (r.x2 - r.x1) * sizeof(rtgui_color_t));
- }
- }
- }
- /* blit a dc to a hardware dc */
- static void rtgui_dc_buffer_blit(struct rtgui_dc* self, struct rtgui_point* dc_point, struct rtgui_dc* dest, rtgui_rect_t* rect)
- {
- struct rtgui_dc_buffer* dc = (struct rtgui_dc_buffer*)self;
- if (dc_point == RT_NULL) dc_point = &rtgui_empty_point;
- if (rtgui_dc_get_visible(dest) == RT_FALSE) return;
- if ((dest->type == RTGUI_DC_HW) || (dest->type == RTGUI_DC_CLIENT))
- {
- rt_uint8_t *line_ptr, *pixels;
- rt_uint16_t rect_width, rect_height, index, pitch;
- rtgui_blit_line_func blit_line;
- /* calculate correct width and height */
- if (rtgui_rect_width(*rect) > (dc->width - dc_point->x))
- rect_width = dc->width - dc_point->x;
- else
- rect_width = rtgui_rect_width(*rect);
- if (rtgui_rect_height(*rect) > (dc->height - dc_point->y))
- rect_height = dc->height - dc_point->y;
- else
- rect_height = rtgui_rect_height(*rect);
- /* prepare pixel line */
- pixels = dc->pixel + dc_point->y * dc->pitch + dc_point->x * sizeof(rtgui_color_t);
- if (hw_driver->byte_per_pixel == sizeof(rtgui_color_t))
- {
- /* it's the same byte per pixel, draw it directly */
- for (index = rect->y1; index < rect->y1 + rect_height; index++)
- {
- dest->engine->blit_line(dest, rect->x1, rect->x1 + rect_width, index, pixels);
- pixels += dc->width * sizeof(rtgui_color_t);
- }
- }
- else
- {
- /* get blit line function */
- blit_line = rtgui_blit_line_get(hw_driver->byte_per_pixel, 4);
- /* calculate pitch */
- pitch = rect_width * sizeof(rtgui_color_t);
- /* create line buffer */
- line_ptr = (rt_uint8_t*) rtgui_malloc(rect_width * hw_driver->byte_per_pixel);
- /* draw each line */
- for (index = rect->y1; index < rect->y1 + rect_height; index ++)
- {
- /* blit on line buffer */
- blit_line(line_ptr, (rt_uint8_t*)pixels, pitch);
- pixels += dc->width * sizeof(rtgui_color_t);
- /* draw on hardware dc */
- dest->engine->blit_line(dest, rect->x1, rect->x1 + rect_width, index, line_ptr);
- }
- /* release line buffer */
- rtgui_free(line_ptr);
- }
- }
- }
- static void rtgui_dc_buffer_blit_line(struct rtgui_dc* self, int x1, int x2, int y, rt_uint8_t* line_data)
- {
- rtgui_color_t* color_ptr;
- struct rtgui_dc_buffer* dc = (struct rtgui_dc_buffer*)self;
- RT_ASSERT(dc != RT_NULL);
- RT_ASSERT(line_data != RT_NULL);
- /* out of range */
- if ((x1 > dc->width) || (y > dc->height)) return;
- /* check range */
- if (x2 > dc->width) x2 = dc->width;
- color_ptr = (rtgui_color_t*)(dc->pixel + y * dc->pitch + x1 * sizeof(rtgui_color_t));
- rt_memcpy(color_ptr, line_data, (x2 - x1) * sizeof(rtgui_color_t));
- }
- static void rtgui_dc_buffer_set_gc(struct rtgui_dc* self, rtgui_gc_t *gc)
- {
- struct rtgui_dc_buffer* dc = (struct rtgui_dc_buffer*)self;
- dc->gc = *gc;
- }
- static rtgui_gc_t *rtgui_dc_buffer_get_gc(struct rtgui_dc* self)
- {
- struct rtgui_dc_buffer* dc = (struct rtgui_dc_buffer*)self;
- return &dc->gc;
- }
- static rt_bool_t rtgui_dc_buffer_get_visible(struct rtgui_dc* dc)
- {
- return RT_TRUE;
- }
- static void rtgui_dc_buffer_get_rect(struct rtgui_dc* self, rtgui_rect_t* rect)
- {
- struct rtgui_dc_buffer* dc = (struct rtgui_dc_buffer*)self;
- rect->x1 = rect->y1 = 0;
- rect->x2 = dc->width;
- rect->y2 = dc->height;
- }
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