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