/**
* 为图像创建一个引用
* @param self 用于存放图像引用的缓存区
* @param source 引用的源图像
* ¶m rect 引用的区域，若为NULL，则引用整个图像
*/
int Graph_Quote( LCUI_Graph *self, LCUI_Graph *source, const LCUI_Rect *rect )
{
LCUI_Size box_size;
LCUI_Rect quote_rect;
if( rect == NULL ) {
quote_rect.x = 0;
quote_rect.y = 0;
quote_rect.width = source->width;
quote_rect.height = source->height;
} else {
quote_rect = *rect;
}
box_size.w = source->width;
box_size.h = source->height;
LCUIRect_ValidateArea( "e_rect, box_size );
/* 如果引用源本身已经引用了另一个源 */
if( source->quote.is_valid ) {
quote_rect.x += source->quote.left;
quote_rect.y += source->quote.top;
source = source->quote.source;
}
if( quote_rect.w <= 0 || quote_rect.h <= 0 ) {
self->width = 0;
self->height = 0;
self->opacity = 1.0;
self->quote.left = 0;
self->quote.top = 0;
self->bytes = NULL;
self->quote.source = NULL;
self->quote.is_valid = FALSE;
return -2;
}
self->width = quote_rect.width;
self->height = quote_rect.height;
self->opacity = 1.0;
self->bytes = NULL;
self->mem_size = 0;
self->color_type = source->color_type;
self->bytes_per_pixel = source->bytes_per_pixel;
self->bytes_per_row = source->bytes_per_row;
self->quote.is_valid = TRUE;
self->quote.source = source;
self->quote.left = quote_rect.x;
self->quote.top = quote_rect.y;
return 0;
}
int Graph_Cut( const LCUI_Graph *graph, LCUI_Rect rect,
LCUI_Graph *buff )
{
if( !Graph_IsValid( graph ) ) {
return -2;
}
LCUIRect_ValidateArea( &rect, Size(graph->w, graph->h) );
if( rect.width <= 0 || rect.height <= 0) {
return -3;
}
switch( graph->color_type ) {
case COLOR_TYPE_ARGB8888:
return Graph_CutARGB( graph, rect, buff );
case COLOR_TYPE_RGB888:
return Graph_CutRGB( graph, rect, buff );
default:break;
}
return -4;
}
/**
* 根据所处框区域，调整矩形
* @param[in] w 目标部件
* @param[in,out] r 矩形区域
* @param[in] box_type 区域相对于何种框进行定位
*/
static void Widget_AdjustArea( LCUI_Widget w, LCUI_Rect *in_rect,
LCUI_Rect *out_rect, int box_type )
{
LCUI_Rect *box;
switch( box_type ) {
case BORDER_BOX: box = &w->base.box.border; break;
case GRAPH_BOX: box = &w->base.box.graph; break;
case CONTENT_BOX:
default: box = &w->base.box.content; break;
}
/* 如果为NULL，则视为使用整个部件区域 */
if( !in_rect ) {
out_rect->x = out_rect->y = 0;
out_rect->w = box->w;
out_rect->h = box->h;
} else {
*out_rect = *in_rect;
}
LCUIRect_ValidateArea( out_rect, Size(box->w, box->h) );
/* 将坐标转换成相对于图像呈现区的坐标 */
out_rect->x += (box->x - w->base.box.graph.x);
out_rect->y += (box->y - w->base.box.graph.y);
}
/**
* 将文本图层中的指定区域的内容绘制至目标图像中
* @param layer 要使用的文本图层
* @param area 文本图层中需要绘制的区域
* @param layer_pos 文本图层在目标图像中的位置
* @param need_replace 绘制时是否需要覆盖像素
* @param graph 目标图像
*/
int TextLayer_DrawToGraph( LCUI_TextLayer *layer, LCUI_Rect area,
LCUI_Pos layer_pos, LCUI_Graph *graph )
{
int x, y, row, col;
LCUI_Pos char_pos;
TextRowData *p_row;
TextCharData *p_char;
LCUI_Size box_size;
box_size.w = layer->max_width;
box_size.h = layer->max_height;
/* 调整区域范围，使之有效 */
LCUIRect_ValidateArea( &area, box_size );
/* 加上Y轴坐标偏移量 */
y = layer->offset_y;
/* 先确定从哪一行开始绘制 */
for( row=0; row<layer->row_list.rows; ++row ) {
p_row = TextRowList_GetRow( &layer->row_list, row );
y += p_row->top_spacing;
y += p_row->max_height;
if( y > area.y ) {
y -= p_row->top_spacing;
y -= p_row->max_height;
break;
}
y += p_row->bottom_spacing;
}
/* 如果没有可绘制的文本行 */
if( row >= layer->row_list.rows ) {
return -1;
}
for( ; row < layer->row_list.rows; ++row ) {
p_row = TextRowList_GetRow( &layer->row_list, row );
/* 根据对齐方式，计算该行的位置 */
switch( layer->text_align ) {
case TEXT_ALIGN_CENTER:
x = (layer->max_width - p_row->max_width)/2;
break;
case TEXT_ALIGN_RIGHT:
x = layer->max_width - p_row->max_width;
break;
case TEXT_ALIGN_LEFT:
default:
x = 0;
break;
}
y += p_row->top_spacing;
x += layer_pos.x;
x += layer->offset_x;
/* 确定从哪个文字开始绘制 */
for( col=0; col<p_row->string_len; ++col ) {
p_char = p_row->string[col];
/* 忽略无字体位图的文字 */
if( !p_char->bitmap ) {
continue;
}
x += p_char->bitmap->advance.x;
if( x > area.x ) {
x -= p_char->bitmap->advance.x;
break;
}
}
/* 若一整行的文本都不在可绘制区域内 */
if( col >= p_row->string_len ) {
y += p_row->max_height;
y += p_row->bottom_spacing;
continue;
}
/* 遍历该行的文字 */
for( ; col<p_row->string_len; ++col ) {
p_char = p_row->string[col];
if( !p_char->bitmap ) {
continue;
}
/* 计算字体位图的绘制坐标 */
char_pos.x = x + p_char->bitmap->left;
char_pos.y = y + p_row->max_height*4/5;
char_pos.y -= p_char->bitmap->top;
x += p_char->bitmap->advance.x;
/* 判断文字使用的前景颜色，再进行绘制 */
if( p_char->style && p_char->style->_fore_color ) {
FontBMP_Mix(
graph, char_pos,
p_char->bitmap,
p_char->style->fore_color );
} else {
FontBMP_Mix(
graph, char_pos,
p_char->bitmap,
layer->text_style.fore_color );
}
/* 如果超过绘制区域则不继续绘制该行文本 */
if( x > area.x + area.width ) {
break;
}
}
y += p_row->max_height;
y += p_row->bottom_spacing;
/* 超出绘制区域范围就不绘制了 */
if( y > area.y + area.height ) {
break;
}
}
return 0;
}
int TextLayer_DrawToGraph( LCUI_TextLayer layer, LCUI_Rect area,
LCUI_Pos layer_pos, LCUI_Graph *graph )
{
TextRow txtrow;
TextChar txtchar;
LCUI_Pos char_pos;
int x, y, row, col, width, height;
y = layer->offset_y;
if( layer->fixed_width > 0 ) {
width = layer->fixed_width;
} else {
width = layer->width;
}
if( layer->fixed_width > 0 ) {
height = layer->fixed_width;
} else {
height = TextLayer_GetHeight( layer );
}
LCUIRect_ValidateArea( &area, width, height );
for( row = 0; row < layer->rowlist.length; ++row ) {
txtrow = TextLayer_GetRow( layer, row );
y += txtrow->height;
if( y > area.y ) {
y -= txtrow->height;
break;
}
}
/* 如果没有可绘制的文本行 */
if( row >= layer->rowlist.length ) {
return -1;
}
for( ; row < layer->rowlist.length; ++row ) {
txtrow = TextLayer_GetRow( layer, row );
x = TextLayer_GetRowStartX( layer, txtrow );
x += layer->offset_x;
/* 确定从哪个文字开始绘制 */
for( col = 0; col < txtrow->length; ++col ) {
txtchar = txtrow->string[col];
/* 忽略无字体位图的文字 */
if( !txtchar->bitmap ) {
continue;
}
x += txtchar->bitmap->advance.x;
if( x > area.x ) {
x -= txtchar->bitmap->advance.x;
break;
}
}
/* 若一整行的文本都不在可绘制区域内 */
if( col >= txtrow->length ) {
y += txtrow->height;
continue;
}
/* 遍历该行的文字 */
for( ; col < txtrow->length; ++col ) {
txtchar = txtrow->string[col];
if( !txtchar->bitmap ) {
continue;
}
/* 计算字体位图的绘制坐标 */
char_pos.x = layer_pos.x + x;
char_pos.y = layer_pos.y + y;
char_pos.x += txtchar->bitmap->left;
char_pos.y += txtrow->text_height * 4 / 5;
char_pos.y += (txtrow->height - txtrow->text_height) / 2;
char_pos.y -= txtchar->bitmap->top;
x += txtchar->bitmap->advance.x;
/* 判断文字使用的前景颜色，再进行绘制 */
if( txtchar->style && txtchar->style->has_fore_color ) {
FontBitmap_Mix( graph, char_pos, txtchar->bitmap,
txtchar->style->fore_color );
} else {
FontBitmap_Mix( graph, char_pos, txtchar->bitmap,
layer->text_style.fore_color );
}
/* 如果超过绘制区域则不继续绘制该行文本 */
if( x > area.x + area.width ) {
break;
}
}
y += txtrow->height;
/* 超出绘制区域范围就不绘制了 */
if( y > area.y + area.height ) {
break;
}
}
return 0;
}
