int Graph_Replace( LCUI_Graph *back, const LCUI_Graph *fore, LCUI_Pos pos )
{
LCUI_Graph write_slot;
LCUI_Rect read_rect,write_rect;
if( !Graph_IsValid(back) || !Graph_IsValid(fore) ) {
return -1;
}
write_rect.x = pos.x;
write_rect.y = pos.y;
write_rect.width = fore->width;
write_rect.height = fore->height;
Graph_Quote( &write_slot, back, &write_rect );
Graph_GetValidRect( &write_slot, &write_rect );
Graph_GetValidRect( fore, &read_rect );
if( write_rect.width <= 0 || write_rect.height <= 0
|| read_rect.width <= 0 || read_rect.height <= 0 ) {
return -2;
}
pos.x = read_rect.x;
pos.y = read_rect.y;
fore = Graph_GetQuote( fore );
back = Graph_GetQuote( back );
switch( fore->color_type ) {
case COLOR_TYPE_RGB888:
return Graph_RGBReplaceRGB( back, write_rect, fore, pos );
case COLOR_TYPE_ARGB8888:
return Graph_ARGBReplaceARGB( back, write_rect, fore, pos );
default:break;
}
return -1;
}
int Graph_Mix( LCUI_Graph *back, const LCUI_Graph *fore, LCUI_Pos pos )
{
LCUI_Graph write_slot;
LCUI_Rect read_rect, write_rect;
void (*mixer)(LCUI_Graph*, LCUI_Rect, const LCUI_Graph *, LCUI_Pos) = NULL;
/* 预先进行有效性判断 */
if( !Graph_IsValid(back) || !Graph_IsValid(fore) ) {
return -1;
}
write_rect.x = pos.x;
write_rect.y = pos.y;
write_rect.width = fore->width;
write_rect.height = fore->height;
LCUIRect_GetCutArea( Size( back->width, back->height ),
write_rect, &read_rect );
write_rect.x += read_rect.x;
write_rect.y += read_rect.y;
write_rect.width = read_rect.width;
write_rect.height = read_rect.height;
Graph_Quote( &write_slot, back, &write_rect );
/* 获取实际操作区域 */
Graph_GetValidRect( &write_slot, &write_rect );
Graph_GetValidRect( fore, &read_rect );
/* 若读或写的区域无效 */
if( write_rect.width <= 0 || write_rect.height <= 0
|| read_rect.width <= 0 || read_rect.height <= 0 ) {
return -2;
}
pos.x = read_rect.x;
pos.y = read_rect.y;
/* 获取引用的源图像 */
fore = Graph_GetQuote( fore );
back = Graph_GetQuote( back );
switch( fore->color_type ) {
case COLOR_TYPE_RGB888:
if( back->color_type == COLOR_TYPE_RGB888 ) {
mixer = Graph_RGBReplaceRGB;
} else {
mixer = Graph_ARGBReplaceRGB;
}
break;
case COLOR_TYPE_ARGB8888:
if( back->color_type == COLOR_TYPE_RGB888 ) {
mixer = Graph_RGBMixARGB;
} else {
mixer = Graph_ARGBMixARGB;
}
default:break;
}
if( mixer ) {
mixer( back, write_rect, fore, pos );
return 0;
}
return -3;
}
LCUI_API LCUI_BOOL Graph_GetPixel( LCUI_Graph *graph, LCUI_Pos pos, LCUI_RGBA *pixel )
{
int i;
LCUI_Rect rect;
if( pos.x < 0 || pos.y < 0 ) {
return FALSE;
}
rect = Graph_GetValidRect( graph );
/* 若坐标超出范围 */
if( pos.x >= rect.width || pos.y >= rect.height ) {
return FALSE;
}
graph = Graph_GetQuote( graph );
if( !Graph_IsValid(graph) ) {
return FALSE;
}
i = graph->w*(pos.y+rect.y) + pos.x + rect.x;
pixel->red = graph->rgba[0][i];
pixel->green = graph->rgba[1][i];
pixel->blue = graph->rgba[2][i];
if(graph->color_type == COLOR_TYPE_RGBA) {
pixel->alpha = graph->rgba[3][i];
} else {
pixel->alpha = 255;
}
return TRUE;
}
static int Graph_VertiFlipARGB( const LCUI_Graph *graph, LCUI_Graph *buff )
{
int y;
LCUI_Rect rect;
uchar_t *byte_src, *byte_des;
if(!Graph_IsValid(graph)) {
return -1;
}
Graph_GetValidRect( graph, &rect );
graph = Graph_GetQuote( graph );
buff->opacity = graph->opacity;
buff->color_type = graph->color_type;
if( 0 != Graph_Create( buff, rect.width, rect.height ) ) {
return -2;
}
byte_src = graph->bytes + (rect.y + rect.h - 1)*graph->bytes_per_row;
byte_src += rect.x * graph->bytes_per_pixel;
byte_des = buff->bytes;
for( y=0; y<rect.h; ++y ) {
memcpy( byte_des, byte_src, buff->bytes_per_row );
byte_src -= graph->bytes_per_row;
byte_des += buff->bytes_per_row;
}
return 0;
}
static int Graph_HorizFlipARGB( const LCUI_Graph *graph, LCUI_Graph *buff )
{
int x, y;
LCUI_Rect rect;
LCUI_ARGB *pixel_src, *pixel_des;
if(!Graph_IsValid(graph)) {
return -1;
}
Graph_GetValidRect( graph, &rect );
graph = Graph_GetQuote( graph );
buff->opacity = graph->opacity;
buff->color_type = graph->color_type;
if( 0 != Graph_Create( buff, rect.width, rect.height ) ) {
return -2;
}
for( y=0; y<rect.h; ++y ) {
pixel_des = buff->argb + y*buff->w;
pixel_src = graph->argb + (rect.y+y)*graph->w;
pixel_src += rect.x + rect.w - 1;
for( x=0; x<rect.w; ++x ) {
*pixel_des++ = *pixel_src--;
}
}
return 0;
}
int Graph_FillRectRGB( LCUI_Graph *graph, LCUI_Color color, LCUI_Rect rect )
{
int x, y;
LCUI_Graph canvas;
uchar_t *rowbytep, *bytep;
if(!Graph_IsValid(graph)) {
return -1;
}
Graph_Quote( &canvas, graph, &rect );
Graph_GetValidRect( &canvas, &rect );
graph = Graph_GetQuote( &canvas );
rowbytep = graph->bytes + rect.y*graph->bytes_per_row;
rowbytep += rect.x*graph->bytes_per_pixel;
for( y=0; y<rect.h; ++y ) {
bytep = rowbytep;
for( x=0; x<rect.w; ++x ) {
*bytep++ = color.blue;
*bytep++ = color.green;
*bytep++ = color.red;
}
rowbytep += graph->bytes_per_row;
}
return 0;
}
static int Graph_HorizFlipRGB( const LCUI_Graph *graph, LCUI_Graph *buff )
{
int x, y, n;
LCUI_Rect rect;
uchar_t *byte_src, *byte_des;
if(!Graph_IsValid(graph)) {
return -1;
}
Graph_GetValidRect( graph, &rect );
graph = Graph_GetQuote( graph );
buff->color_type = graph->color_type;
if( 0 != Graph_Create( buff, rect.width, rect.height ) ) {
return -2;
}
for( y=0; y<rect.h; ++y ) {
byte_des = buff->bytes + y*buff->w*3;
n = ((rect.y+y)*graph->w + rect.x + rect.w - 1)*3;
byte_src = buff->bytes + n;
for( x=0; x<rect.w; ++x ) {
*byte_des++ = *byte_src--;
*byte_des++ = *byte_src--;
*byte_des++ = *byte_src--;
}
}
return 0;
}
int Graph_FillAlpha( LCUI_Graph *graph, uchar_t alpha )
{
int x, y;
LCUI_Rect rect;
LCUI_ARGB *pixel, *pixel_row;
Graph_GetValidRect( graph, &rect );
graph = Graph_GetQuote( graph );
if( !Graph_IsValid(graph) ) {
return -1;
}
if( !Graph_HasAlpha(graph) ) {
return -2;
}
pixel_row = graph->argb + rect.y*graph->w + rect.x;
for(y=0; y<rect.h; ++y) {
pixel = pixel_row;
for( x=0; x<rect.w; ++x ) {
pixel->alpha = alpha;
++pixel;
}
pixel_row += graph->w;
}
return 0;
}
LCUI_API int Graph_FillAlpha( LCUI_Graph *src, uchar_t alpha )
{
int y, row_start;
LCUI_Rect src_rect;
/* 获取引用的区域在源图形中的有效区域 */
src_rect = Graph_GetValidRect( src );
/* 获取引用的源图指针 */
src = Graph_GetQuote( src );
if(! Graph_IsValid(src) ) {
return -1;
}
if( !Graph_HaveAlpha(src) ) {
return -2;
}
row_start = src_rect.x + src_rect.y * src->w;
for(y=0; y<src_rect.height; ++y) {
memset( &src->rgba[3][row_start],
alpha, src_rect.width*sizeof(uchar_t) );
row_start += src->w;
}
return 0;
}
LCUI_API int Graph_VertiFlip( LCUI_Graph *src_graph, LCUI_Graph *out_graph )
{
uchar_t buff;
LCUI_Rect rect;
int x, y, center;
int src_top_pos, src_bottom_pos;
int des_top_pos, des_bottom_pos;
int src_start_top_pos, src_start_bottom_pos;
int des_start_top_pos, des_start_bottom_pos;
if(!Graph_IsValid(src_graph)) {
return -1;
}
src_graph = Graph_GetQuote(src_graph );
rect = Graph_GetValidRect( src_graph );
out_graph->color_type = src_graph->color_type;
if( 0 != Graph_Create(out_graph, rect.width, rect.height ) ) {
return -2;
}
center = (int)(rect.height / 2.0);
/* 记录基坐标 */
des_start_top_pos = 0;
des_start_bottom_pos = (rect.height-1)*rect.width;
src_start_top_pos = rect.y * src_graph->w + rect.x;
src_start_bottom_pos = (rect.y + rect.height-1)*src_graph->w + rect.x;
for (x=0; x < rect.width; ++x) {
/* 当前坐标=基坐标+x */
des_top_pos = des_start_top_pos + x;
des_bottom_pos = des_start_bottom_pos + x;
src_top_pos = src_start_top_pos + x;
src_bottom_pos = src_start_bottom_pos + x;
for (y = 0; y <= center; ++y) {
buff = src_graph->rgba[0][src_top_pos];
out_graph->rgba[0][des_top_pos] = src_graph->rgba[0][src_bottom_pos];
out_graph->rgba[0][des_bottom_pos] = buff;
buff = src_graph->rgba[1][src_top_pos];
out_graph->rgba[1][des_top_pos] = src_graph->rgba[1][src_bottom_pos];
out_graph->rgba[1][des_bottom_pos] = buff;
buff = src_graph->rgba[2][src_top_pos];
out_graph->rgba[2][des_top_pos] = src_graph->rgba[2][src_bottom_pos];
out_graph->rgba[2][des_bottom_pos] = buff;
if(src_graph->color_type == COLOR_TYPE_RGBA) {
buff = src_graph->rgba[3][src_top_pos];
out_graph->rgba[3][des_top_pos] = src_graph->rgba[3][src_bottom_pos];
out_graph->rgba[3][des_bottom_pos] = buff;
}
src_top_pos += src_graph->w;
des_top_pos += rect.width;
src_bottom_pos -= src_graph->w;
des_bottom_pos -= rect.width;
}
}
return 0;
}
static void Graph_DrawLeftShadow( LCUI_PaintContext paint, LCUI_Rect *box,
LCUI_BoxShadow *shadow )
{
float v, a;
LCUI_Color color;
LCUI_Graph *graph;
int s, t, x, y, bound_x, bound_y;
LCUI_Rect shadow_area, box_area, paint_area, area;
s = 255;
t = BLUR_WIDTH(shadow);
v = 512.0/t;
a = 2*(v*t-s)/(t*t);
color = shadow->color;
box_area.x = BoxShadow_GetBoxX( shadow );
box_area.y = BoxShadow_GetBoxY( shadow );
box_area.w = BoxShadow_GetBoxWidth( shadow, box->w );
box_area.h = BoxShadow_GetBoxHeight( shadow, box->h );
shadow_area.x = BoxShadow_GetX( shadow );
shadow_area.y = BoxShadow_GetY( shadow ) + BLUR_WIDTH(shadow);
shadow_area.w = BLUR_WIDTH(shadow);
shadow_area.h = box_area.h + INNER_SHADOW_WIDTH(shadow)*2;
box_area.x += box->x;
box_area.y += box->y;
shadow_area.x += box->x;
shadow_area.y += box->y;
if( !LCUIRect_GetOverlayRect( &shadow_area, &paint->rect, &area ) ) {
return;
}
Graph_GetValidRect( &paint->canvas, &paint_area );
graph = Graph_GetQuote( &paint->canvas );
shadow_area.x -= paint->rect.x;
shadow_area.y -= paint->rect.y;
box_area.x -= paint->rect.x;
box_area.y -= paint->rect.y;
area.x -= paint->rect.x;
area.y -= paint->rect.y;
bound_x = area.x + area.width;
bound_y = area.y + area.height;
if( bound_x > paint_area.x + paint_area.width ) {
bound_x = paint_area.x + paint_area.width;
}
if( bound_y > paint_area.y + paint_area.height ) {
bound_y = paint_area.y + paint_area.height;
}
t -= area.x - shadow_area.x;
for( x = area.x; x < bound_x; ++x, --t ) {
color.alpha = (uchar_t)(s - (v*t - (a*t*t) / 2));
color.alpha *= shadow->color.a / 255.0;
for( y = area.y; y < bound_y; ++y ) {
if( y >= box_area.y && y < box_area.y + box_area.h &&
x >= box_area.x && x < box_area.x + box_area.w ) {
continue;
}
Graph_SetPixel( graph, x, y, color );
}
}
}
static void Graph_DrawTopShadow( LCUI_PaintContext paint, LCUI_Rect *box,
LCUI_BoxShadow *shadow )
{
float v, a;
int s, t, x, y, bound_x, bound_y;
LCUI_Color color;
LCUI_Graph *graph;
LCUI_Rect shadow_area, box_area, area;
box_area.x = BoxShadow_GetBoxX( shadow );
box_area.y = BoxShadow_GetBoxY( shadow );
box_area.w = BoxShadow_GetBoxWidth( shadow, box->w );
box_area.h = BoxShadow_GetBoxHeight( shadow, box->h );
/* 计算需要绘制上边阴影的区域 */
shadow_area.x = BoxShadow_GetX( shadow ) + BLUR_WIDTH(shadow);
shadow_area.y = BoxShadow_GetY( shadow );
shadow_area.w = box_area.w + INNER_SHADOW_WIDTH(shadow)*2;
shadow_area.h = BLUR_WIDTH(shadow);
color = shadow->color;
bound_x = shadow_area.x + shadow_area.w;
bound_y = shadow_area.y + shadow_area.h;
graph = Graph_GetQuote( &paint->canvas );
Graph_GetValidRect( &paint->canvas, &area );
if( !LCUIRect_GetOverlayRect( &area, &paint->rect, &area ) ) {
return;
}
/**
* 这里采用匀减速直线运动的公式： s = vt - at²/2
* 加速度 a 的求值公式为：a = 2x(vt - s)/t²
*/
s = 255;
t = BLUR_WIDTH(shadow);
v = 512.0/t;
a = 2*(v*t-s)/(t*t);
for( y=shadow_area.y; y<bound_y; ++y,--t ) {
/* 忽略不在有效区域内的像素 */
if( y < area.y || y >= area.y + area.h ) {
continue;
}
/* 计算当前行阴影的透明度 */
color.alpha = (uchar_t)(s-(v*t-(a*t*t)/2));
color.alpha *= shadow->color.a/255.0;
for( x=shadow_area.x; x<bound_x; ++x ) {
if( x < area.x || x >= area.x + area.w ) {
continue;
}
if( y >= box_area.y && y < box_area.y + box_area.h
&& x >= box_area.x && x < box_area.x + box_area.w ) {
continue;
}
Graph_SetPixel( graph, x, y, color );
}
}
}
LCUI_API int Graph_Zoom( LCUI_Graph *in_graph,
LCUI_Graph *out_graph,
LCUI_BOOL keep_scale,
LCUI_Size size )
{
LCUI_Graph *src;
LCUI_Rect rect;
LCUI_Pos pos;
int des_n, src_n, x, y, k, m;
double scale_x,scale_y;
if(!Graph_IsValid(in_graph)) {
return -1;
}
if(size.w <=0 || size.h <= 0) {
Graph_Free(out_graph);
return -1;
}
/* 获取引用的有效区域，以及指向引用的对象的指针 */
rect = Graph_GetValidRect(in_graph);
src = Graph_GetQuote(in_graph);
scale_x = (double)rect.width / size.w;
scale_y = (double)rect.height / size.h;
/* 如果缩放方式为缺省，图像的宽和高的缩放比例将会一样 */
if( keep_scale ) {
if (scale_x<scale_y) {
scale_y = scale_x;
} else {
scale_x = scale_y;
}
}
out_graph->color_type = in_graph->color_type;
if( Graph_Create(out_graph, size.w, size.h) < 0) {
return -2;
}
for (y=0; y < size.h; ++y) {
pos.y = y*scale_y;
k = y*size.w;
m = (pos.y+rect.y)*src->w + rect.x;
for (x = 0; x < size.w; ++x) {
pos.x = x*scale_x;
src_n = k + x;
des_n = m + pos.x;
out_graph->rgba[0][src_n] = src->rgba[0][des_n];
out_graph->rgba[1][src_n] = src->rgba[1][des_n];
out_graph->rgba[2][src_n] = src->rgba[2][des_n];
if( in_graph->color_type == COLOR_TYPE_RGBA) {
out_graph->rgba[3][src_n] = src->rgba[3][des_n];
}
}
}
return 0;
}
LCUI_API int Graph_HorizFlip( LCUI_Graph *src_graph, LCUI_Graph *out_graph )
{
int x, y, center;
int src_left_pos, src_right_pos;
int des_left_pos, des_right_pos;
uchar_t buff;
LCUI_Graph *src;
LCUI_Rect rect;
if(!Graph_IsValid(src_graph)) {
return -1;
}
rect = Graph_GetValidRect( src_graph );
src = Graph_GetQuote( src_graph );
out_graph->color_type = src->color_type;
if( 0 != Graph_Create( out_graph, rect.width, rect.height ) ) {
return -2;
}
/* 水平翻转其实也就是交换两边的数据 */
center = (int)(rect.width / 2.0);
for (y = 0; y < rect.height; ++y) {
des_left_pos = y * rect.width;
des_right_pos = des_left_pos + rect.width -1;
src_left_pos = (y + rect.y) * src->w + rect.x;
src_right_pos = src_left_pos + rect.width -1;
for (x = 0; x <= center; ++x) {
buff = src->rgba[0][src_left_pos];
out_graph->rgba[0][des_left_pos] = src->rgba[0][src_right_pos];
out_graph->rgba[0][des_right_pos] = buff;
buff = src->rgba[1][src_left_pos];
out_graph->rgba[1][des_left_pos] = src->rgba[1][src_right_pos];
out_graph->rgba[1][des_right_pos] = buff;
buff = src->rgba[2][src_left_pos];
out_graph->rgba[2][des_left_pos] = src->rgba[2][src_right_pos];
out_graph->rgba[2][des_right_pos] = buff;
if(src->color_type == COLOR_TYPE_RGBA) {
buff = src->rgba[3][src_left_pos];
out_graph->rgba[3][des_left_pos] = src->rgba[3][src_right_pos];
out_graph->rgba[3][des_right_pos] = buff;
}
++src_left_pos;
++des_left_pos;
--src_right_pos;
--des_right_pos;
}
}
return 0;
}
LCUI_API int
LCUIScreen_PutGraph (LCUI_Graph *graph, LCUI_Pos des_pos )
{
int total, y, n, des_row_x, src_row_x, des_x, src_x;
LCUI_Graph *src;
LCUI_Rect cut, src_rect;
LCUI_Size screen_size;
uchar_t *des_ptr;
src = Graph_GetQuote( graph );
src_rect = Graph_GetValidRect( graph );
screen_size = LCUIScreen_GetSize();
if(!Graph_IsValid(src)) {
return -1;
}
if(des_pos.x >= screen_size.w || des_pos.y >= screen_size.h) {
return -1;
}
des_ptr = pixel_mem;
Graph_Lock( src );
/* 获取图像的截取区域 */
if( LCUIRect_GetCutArea( screen_size,
Rect( des_pos.x, des_pos.y, src_rect.width, src_rect.height ),
&cut
)) {
des_pos.x += cut.x;
des_pos.y += cut.y;
}
/* 根据二维坐标和图像尺寸，计算源图像的起始读取点的一维坐标 */
src_row_x = (cut.y + src_rect.y) * src->width + cut.x + src_rect.x;
/* 根据二维坐标和屏幕尺寸，计算帧缓冲的起始写入点的一维坐标 */
des_row_x = des_pos.y * screen_size.w + des_pos.x;
for(y=0; y<cut.height; ++y) {
src_x = src_row_x;
des_x = des_row_x;
total = src_x + cut.width;
for (; src_x < total; ++des_x,++src_x) {
n = des_x << 2;
des_ptr[n++] = src->rgba[2][src_x];
des_ptr[n++] = src->rgba[1][src_x];
des_ptr[n++] = src->rgba[0][src_x];
}
src_row_x += src->width;
/* DIB扫描行是上下颠倒的，因此是从行尾到行首递减 */
des_row_x += screen_size.w;
}
Graph_Unlock( src );
return 0;
}
static void Graph_DrawRightShadow( LCUI_PaintContext paint, LCUI_Rect *box,
LCUI_BoxShadow *shadow )
{
float v, a;
int s, t, x, y, bound_x, bound_y;
LCUI_Color color;
LCUI_Graph *graph;
LCUI_Rect shadow_area, box_area, area;
box_area.x = BoxShadow_GetBoxX( shadow );
box_area.y = BoxShadow_GetBoxY( shadow );
box_area.w = BoxShadow_GetBoxWidth( shadow, box->w );
box_area.h = BoxShadow_GetBoxHeight( shadow, box->h );
shadow_area.x = BoxShadow_GetX( shadow ) + SHADOW_WIDTH(shadow);
shadow_area.x += box_area.w + INNER_SHADOW_WIDTH(shadow);
shadow_area.y = BoxShadow_GetY( shadow ) + BLUR_WIDTH(shadow);
shadow_area.w = BLUR_WIDTH(shadow);
shadow_area.h = box_area.h + INNER_SHADOW_WIDTH(shadow)*2;
color = shadow->color;
bound_x = shadow_area.x + shadow_area.w;
bound_y = shadow_area.y + shadow_area.h;
graph = Graph_GetQuote( &paint->canvas );
Graph_GetValidRect( &paint->canvas, &area );
if( !LCUIRect_GetOverlayRect( &area, &paint->rect, &area ) ) {
return;
}
s = 255;
t = BLUR_WIDTH(shadow);
v = 512.0/t;
a = 2*(v*t-s)/(t*t);
for( t=0,x=shadow_area.x; x<bound_x; ++x,++t ) {
if( x < area.x || x >= area.x + area.w ) {
continue;
}
color.alpha = (uchar_t)(s-(v*t-(a*t*t)/2));
color.alpha *= shadow->color.a/255.0;
for( y=shadow_area.y; y<bound_y; ++y ) {
if( y < area.y || y >= area.y + area.h ) {
continue;
}
if( y >= box_area.y && y < box_area.y + box_area.h
&& x >= box_area.x && x < box_area.x + box_area.w ) {
continue;
}
Graph_SetPixel( graph, x, y, color );
}
}
}
static int Graph_ZoomRGB( const LCUI_Graph *graph,
LCUI_Graph *buff,
LCUI_BOOL keep_scale,
LCUI_Size size )
{
LCUI_Rect rect;
int x, y, src_x, src_y, tmp;
double scale_x, scale_y;
uchar_t *byte_src, *byte_des;
if( !Graph_IsValid(graph) ) {
return -1;
}
if( size.w <= 0 || size.h <= 0 ) {
Graph_Free( buff );
return -1;
}
/* 获取引用的有效区域，以及指向引用的对象的指针 */
Graph_GetValidRect( graph, &rect );
graph = Graph_GetQuote( graph );
scale_x = (double)rect.width / size.w;
scale_y = (double)rect.height / size.h;
/* 如果保持宽高比 */
if( keep_scale ) {
if (scale_x<scale_y) {
scale_y = scale_x;
} else {
scale_x = scale_y;
}
}
buff->color_type = graph->color_type;
if( Graph_Create(buff, size.w, size.h) < 0) {
return -2;
}
for( y=0; y < size.h; ++y ) {
src_y = y * scale_y;
tmp = ((src_y + rect.y) * graph->w + rect.x) * 3;
byte_des = buff->bytes + y * size.w * 3;
for( x=0; x < size.w; ++x ) {
src_x = x * scale_x * 3;
byte_src = graph->bytes + tmp + src_x;
*byte_des++ = *byte_src++;
*byte_des++ = *byte_src++;
*byte_des++ = *byte_src++;
}
}
return 0;
}
LCUI_API int Graph_FillRect( LCUI_Graph *graph, LCUI_RGB color, LCUI_Rect rect )
{
size_t size;
int pos, y;
LCUI_Rect src_rect;
uchar_t *r_ptr, *g_ptr, *b_ptr;
src_rect = Graph_GetValidRect( graph );
graph = Graph_GetQuote( graph );
if(! Graph_IsValid(graph) ) {
return -1;
}
rect.x = rect.x + src_rect.x;
rect.y = rect.y + src_rect.y;
/* 计算出该填充区域实际的有效区域范围 */
if( rect.x < src_rect.x ) {
rect.width -= (src_rect.x-rect.x);
rect.x = src_rect.x;
}
if( rect.x + rect.width > src_rect.x + src_rect.width ) {
rect.width = src_rect.x + src_rect.width - rect.x;
}
if( rect.y < src_rect.y ) {
rect.height -= (src_rect.y-rect.y);
rect.y = src_rect.y;
}
if( rect.y + rect.height > src_rect.x + src_rect.height ) {
rect.height = src_rect.y + src_rect.height - rect.y;
}
size = sizeof(uchar_t) * rect.width;
pos = rect.x + rect.y * graph->w;
r_ptr = graph->rgba[0] + pos;
g_ptr = graph->rgba[1] + pos;
b_ptr = graph->rgba[2] + pos;
for(y=0; y<rect.height; ++y) {
memset( r_ptr, color.red, size );
memset( g_ptr, color.green, size );
memset( b_ptr, color.blue, size );
r_ptr += graph->w;
g_ptr += graph->w;
b_ptr += graph->w;
}
return 0;
}
static int Graph_FillRectARGB( LCUI_Graph *graph, LCUI_Color color,
LCUI_Rect rect )
{
int x, y;
LCUI_Rect rect_src;
LCUI_ARGB *px_p, *px_row_p;
if(!Graph_IsValid(graph)) {
return -1;
}
Graph_GetValidRect( graph, &rect_src );
graph = Graph_GetQuote( graph );
px_row_p = graph->argb + (rect_src.y+rect.y)*graph->w;
px_row_p += rect.x + rect_src.x;
for( y=0; y<rect.h; ++y ) {
px_p = px_row_p;
for( x=0; x<rect.w; ++x ) {
*px_p++ = color;
}
px_row_p += graph->w;
}
return 0;
}
LCUI_API int Graph_Mix( LCUI_Graph *back_graph,
LCUI_Graph *fore_graph,
LCUI_Pos des_pos )
{
LCUI_Graph *src, *des;
LCUI_Rect cut, src_rect, area, des_rect;
LCUI_Size box_size;
LCUI_Pos src_pos;
/* 预先进行有效性判断 */
if( !Graph_IsValid(back_graph)
|| !Graph_IsValid(fore_graph) ) {
return -1;
}
/* 获取引用的源图像的最终区域 */
src_rect = Graph_GetValidRect(fore_graph);
des_rect = Graph_GetValidRect(back_graph);
/* 获取引用的源图像 */
src = Graph_GetQuote(fore_graph);
des = Graph_GetQuote(back_graph);
/* 判断引用的源图像的有效性 */
if(!Graph_IsValid(des) || !Graph_IsValid(src)) {
return -1;
}
/* 判断坐标是否在背景图的范围内 */
if(des_pos.x > des->w || des_pos.y > des->h) {
return -1;
}
/* 记录容器尺寸 */
box_size.w = des_rect.width;
box_size.h = des_rect.height;
/* 记录前景图像在容器中的区域 */
area.x = des_pos.x;
area.y = des_pos.y;
area.width = src_rect.width;
area.height = src_rect.height;
/* 获取前景图像区域中的需要裁减的区域 */
LCUIRect_GetCutArea( box_size, area, &cut );
/* 移动前景图像区域的坐标 */
des_pos.x += cut.x;
des_pos.y += cut.y;
/* 得出源图像的读取区域的坐标 */
src_pos.x = cut.x + src_rect.x;
src_pos.y = cut.y + src_rect.y;
/* 得出目标图像的写入区域 */
des_rect.x = des_pos.x + des_rect.x;
des_rect.y = des_pos.y + des_rect.y;
des_rect.width = cut.width;
des_rect.height = cut.height;
/* 如果前景图像有alpha通道 */
if( src->color_type == COLOR_TYPE_RGBA ) {
/* 如果全局透明度为255，则说明混合时不需要考虑全局透明度 */
if( src->alpha == 255 ) {
Graph_RGBAMix( des, des_rect, src, src_pos );
return 0;
}
Graph_RGBAMixWithGlobalAlpha( des, des_rect, src, src_pos );
return 0;
}
/* 否则，前景图像没有Alpha通道 */
/* 如果全局透明度为255，说明前景图形没有透明效果 */
if( src->alpha == 255 ) {
Graph_RGBMix( des, des_rect, src, src_pos );
return 0;
}
/* 否则，将全局透明度计算在内，进行alpha混合 */
Graph_RGBMixWithGlobalAlpha( des, des_rect, des, src_pos );
return 0;
}
static int
Graph_Draw_RoundBorder_RightTop(
LCUI_Graph *des, LCUI_Pos center,
int radius, int line_width,
LCUI_RGB line_color, LCUI_BOOL hide_outarea )
/* 绘制右上角的圆角，从右边框的上端到上边框的右端绘制一条圆角线 */
{
LCUI_Rect real_rect;
int pos, center_pos, y, x, i, n;
int max_x, max_y, min_x, min_y;
if( line_width <= 0 && !hide_outarea ) {
return 1;
}
real_rect = Graph_GetValidRect( des );
des = Graph_GetQuote( des );
if( !Graph_IsValid( des ) ) {
return -1;
}
max_x = radius*2;
if( center.x+radius > real_rect.x + real_rect.width ) {
max_x -= (center.x+radius-real_rect.x-real_rect.width);
}
if( max_x < 0 ) {
max_x = 0;
}
min_x = center.x>radius? 0:radius-center.x;
if( min_x < 0 ) {
min_x = 0;
}
max_y = radius*2;
if( center.y+radius > real_rect.y + real_rect.height ) {
max_y -= (center.y+radius-real_rect.y-real_rect.height);
}
min_y = center.y>radius? 0:radius-center.y;
if( min_y < 0 ) {
min_y = 0;
}
center_pos = (real_rect.y + center.y) * des->width;
center_pos = center_pos + center.x + real_rect.x;
for( y=0; y<=radius; ++y, center_pos -= des->width ) {
if( radius-y >= max_y || radius-y < min_y ) {
continue;
}
x = (int)sqrt( pow(radius, 2) - y*y );
if( line_width > 0 && radius+x >= min_x
&& radius+x <= max_x ) {
pos = center_pos + x;
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
if( hide_outarea && des->have_alpha ) {
n = center_pos + max_x - radius;
if( radius+x < min_x ) {
pos = center_pos + min_x - radius;
} else {
pos = center_pos + x;
}
for( ++pos; pos<=n; ++pos ) {
des->rgba[3][pos] = 0;
}
}
/* 计算需要向左填充的像素点的个数n */
n = radius+x-line_width;
n = n<min_x ? x+radius-min_x:line_width;
if( radius+x > max_x ) {
pos = center_pos - radius+max_x-1;
n -= (radius+x-max_x);
} else {
pos = center_pos + x;
}
for(i=0; i<n; ++i,--pos) {
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
}
return 0;
}
/**
* 绘制上边阴影
* @param[in] paint 绘制上下文
* @param[in] box 可供绘制阴影的区域范围
* @param[in] shadow 阴影参数
*/
static void Graph_DrawTopShadow( LCUI_PaintContext paint, LCUI_Rect *box,
LCUI_BoxShadow *shadow )
{
float v, a;
LCUI_Color color;
LCUI_Graph *graph;
int s, t, x, y, bound_x, bound_y;
LCUI_Rect shadow_area, box_area, paint_area, area;
/**
* 这里采用匀减速直线运动的公式： s = vt - at²/2
* 加速度 a 的求值公式为：a = 2x(vt - s)/t²
*/
s = 255;
t = BLUR_WIDTH( shadow );
v = 512.0 / t;
a = 2 * (v*t - s) / (t*t);
color = shadow->color;
/* 计算阴影内框区域 */
box_area.x = BoxShadow_GetBoxX( shadow );
box_area.y = BoxShadow_GetBoxY( shadow );
box_area.w = BoxShadow_GetBoxWidth( shadow, box->w );
box_area.h = BoxShadow_GetBoxHeight( shadow, box->h );
/* 计算需要绘制的阴影区域 */
shadow_area.x = BoxShadow_GetX( shadow ) + BLUR_WIDTH(shadow);
shadow_area.y = BoxShadow_GetY( shadow );
shadow_area.w = box_area.w + INNER_SHADOW_WIDTH(shadow)*2;
shadow_area.h = BLUR_WIDTH(shadow);
/* 调整坐标 */
box_area.x += box->x;
box_area.y += box->y;
shadow_area.x += box->x;
shadow_area.y += box->y;
/* 如果阴影区域不在绘制范围内 */
if( !LCUIRect_GetOverlayRect( &shadow_area, &paint->rect, &area ) ) {
return;
}
/* 获取有效的绘制范围 */
Graph_GetValidRect( &paint->canvas, &paint_area );
graph = Graph_GetQuote( &paint->canvas );
/* 将坐标转换成相对于绘制区域 */
shadow_area.x -= paint->rect.x;
shadow_area.y -= paint->rect.y;
box_area.x -= paint->rect.x;
box_area.y -= paint->rect.y;
area.x -= paint->rect.x;
area.y -= paint->rect.y;
bound_x = area.x + area.width;
bound_y = area.y + area.height;
/* 避免超出绘制范围 */
if( bound_x > paint_area.x + paint_area.width ) {
bound_x = paint_area.x + paint_area.width;
}
if( bound_y > paint_area.y + paint_area.height ) {
bound_y = paint_area.y + paint_area.height;
}
t -= area.x - shadow_area.x;
for( y = area.y; y < bound_y; ++y, --t ) {
/* 计算当前行像素点的透明度 */
color.alpha = (uchar_t)(s - (v*t - (a*t*t) / 2));
color.alpha *= shadow->color.a / 255.0;
for( x = area.x; x < bound_x; ++x ) {
if( y >= box_area.y && y < box_area.y + box_area.h
&& x >= box_area.x && x < box_area.x + box_area.w ) {
continue;
}
Graph_SetPixel( graph, x, y, color );
}
}
}
LCUI_API int Graph_Replace( LCUI_Graph *back_graph,
LCUI_Graph *fore_graph,
LCUI_Pos des_pos )
{
LCUI_Graph *src, *des;
LCUI_Rect cut, src_rect, area, des_rect;
LCUI_Size box_size;
LCUI_Pos src_pos;
/* 预先进行有效性判断 */
if( !Graph_IsValid(back_graph)
|| !Graph_IsValid(fore_graph) ) {
return -1;
}
/* 获取引用的源图像的最终区域 */
src_rect = Graph_GetValidRect(fore_graph);
des_rect = Graph_GetValidRect(back_graph);
/* 获取引用的源图像 */
src = Graph_GetQuote(fore_graph);
des = Graph_GetQuote(back_graph);
/* 判断引用的源图像的有效性 */
if(!Graph_IsValid(des) || !Graph_IsValid(src)) {
return -1;
}
/* 判断坐标是否在背景图的范围内 */
if(des_pos.x > des->w || des_pos.y > des->h) {
return -1;
}
/* 记录容器尺寸 */
box_size.w = des_rect.width;
box_size.h = des_rect.height;
/* 记录前景图像在容器中的区域 */
area.x = des_pos.x;
area.y = des_pos.y;
area.width = src_rect.width;
area.height = src_rect.height;
/* 获取前景图像区域中的需要裁减的区域 */
LCUIRect_GetCutArea( box_size, area, &cut );
/* 移动前景图像区域的坐标 */
des_pos.x += cut.x;
des_pos.y += cut.y;
/* 得出源图像的读取区域的坐标 */
src_pos.x = cut.x + src_rect.x;
src_pos.y = cut.y + src_rect.y;
/* 得出目标图像的写入区域 */
des_rect.x = des_pos.x + des_rect.x;
des_rect.y = des_pos.y + des_rect.y;
des_rect.width = cut.width;
des_rect.height = cut.height;
/* 如果前景图像有透明度 */
if( src->color_type == COLOR_TYPE_RGBA ) {
/* 若背景图有透明度 */
if( des->color_type == COLOR_TYPE_RGBA ) {
return Graph_DirectReplace( des, des_rect, src, src_pos );
}
if( src->alpha == 255 ) {
return Graph_RGBAReplaceRGB( des, des_rect, src, src_pos );
}
return Graph_RGBAReplaceRGBWithGlobalAlpha( des, des_rect, src, src_pos );
}
if( des->color_type == COLOR_TYPE_RGBA ) {
return Graph_RGBReplaceRGBA( des, des_rect, src, src_pos );
}
return Graph_DirectReplace( des, des_rect, src, src_pos );
}
static int
Graph_Draw_RoundBorder_LeftTop(
LCUI_Graph *des, LCUI_Pos center,
int radius, int line_width,
LCUI_RGB line_color, LCUI_BOOL hide_outarea )
/* 绘制左上角的圆角，从左边框的上端到上边框的左端绘制一条圆角线 */
{
LCUI_Rect real_rect;
int pos, center_pos, y, x, i, n;
int max_x, max_y, min_x, min_y;
if( line_width <= 0 && !hide_outarea ) {
return 1;
}
real_rect = Graph_GetValidRect( des );
des = Graph_GetQuote( des );
if( !Graph_IsValid( des ) ) {
return -1;
}
/* 预先计算xy轴坐标的有效范围 */
max_x = radius*2;
if( center.x+radius > real_rect.x + real_rect.width ) {
max_x -= (center.x+radius-real_rect.x-real_rect.width);
}
if( max_x < 0 ) {
max_x = 0;
}
min_x = center.x>radius? 0:radius-center.x;
if( min_x < 0 ) {
min_x = 0;
}
max_y = radius*2;
if( center.y+radius > real_rect.y + real_rect.height ) {
max_y -= (center.y+radius-real_rect.y-real_rect.height);
}
min_y = center.y>radius? 0:radius-center.y;
if( min_y < 0 ) {
min_y = 0;
}
/* 预先计算圆心的线性坐标 */
center_pos = (real_rect.y + center.y) * des->width;
center_pos = center_pos + center.x + real_rect.x;
/* 根据y轴计算各点的x轴坐标并填充点 */
for( y=0; y<=radius; ++y, center_pos -= des->width ) {
if( radius-y >= max_y || radius-y < min_y ) {
continue;
}
/* 计算出x轴整数坐标 */
x = (int)sqrt( pow(radius, 2) - y*y );
if( line_width > 0 && radius-x >= min_x
&& radius-x <= max_x ) {
pos = center_pos - x;
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
if( hide_outarea && des->have_alpha ) {
/* 计算起点坐标 */
pos = center_pos - center.x;
if( radius-x > max_x ) {
n = max_x - min_x;
} else {
n = radius-x-min_x;
}
/* 加上圆与背景图的左边距 */
n += (center.x-radius);
for(i=0; i<n; ++i) {
des->rgba[3][pos++]=0;
}
}
/* 计算需要向右填充的像素点的个数n */
n = radius-x+line_width;
n = n>radius ? x:line_width;
/* 如果该点x轴坐标小于最小x轴坐标 */
if( radius-x < min_x ) {
/* 重新确定起点坐标pos和填充的像素点的个数n */
pos = center_pos - radius+min_x-1;
n -= (min_x-radius+x);
} else {
pos = center_pos - x;
}
/* 从下一个像素点开始 */
++pos;
/* 如果填充的像素点超出了最大x轴范围 */
if( radius-x + n > max_x ) {
/* 重新确定需要填充的像素点的个数n */
n = max_x - radius + x;
}
/* 开始填充当前点右边的n-1个像素点 */
for(i=0; i<n-1; ++i,++pos) {
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
}
return 0;
}
static int
Graph_Draw_RoundBorder_BottomLeft(
LCUI_Graph *des, LCUI_Pos center,
int radius, int line_width,
LCUI_RGB line_color, LCUI_BOOL hide_outarea )
/* 绘制左下角的圆角，从下边框的左端到左边框的下端绘制一条圆角线 */
{
LCUI_Rect real_rect;
int tmp_pos, pos, center_pos, y, x, i, n;
int max_x, max_y, min_x, min_y;
if( line_width <= 0 && !hide_outarea ) {
return 1;
}
real_rect = Graph_GetValidRect( des );
des = Graph_GetQuote( des );
if( !Graph_IsValid( des ) ) {
return -1;
}
max_x = radius*2;
if( center.x+radius > real_rect.x + real_rect.width ) {
max_x -= (center.x+radius-real_rect.x-real_rect.width);
}
if( max_x < 0 ) {
max_x = 0;
}
min_x = center.x>radius? 0:radius-center.x;
if( min_x < 0 ) {
min_x = 0;
}
max_y = radius*2;
if( center.y+radius > real_rect.y + real_rect.height ) {
max_y -= (center.y+radius-real_rect.y-real_rect.height);
}
min_y = center.y>radius? 0:radius-center.y;
if( min_y < 0 ) {
min_y = 0;
}
center_pos = (real_rect.y + center.y) * des->width;
center_pos = center_pos + center.x + real_rect.x;
for( x=0; x<=radius; ++x ) {
if( radius-x >= max_x || radius-x < min_x ) {
continue;
}
y = (int)sqrt( pow(radius, 2) - x*x );
if( radius+y > max_y ) {
pos = center_pos;
pos += (max_y-radius)*des->width;
} else {
pos = center_pos + y * des->width - x;
}
if( line_width > 0 && radius+y >= min_y
&& radius+y <= max_y ) {
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
if( hide_outarea && des->have_alpha ) {
tmp_pos = pos;
if( radius+y < min_y ) {
n = max_y - min_y;
} else {
n = max_y-radius-y;
}
/* 加上圆与背景图的下边距 */
n += (real_rect.height-center.y-radius);
tmp_pos+=des->width;
for(i=0; i<n; ++i,tmp_pos+=des->width) {
des->rgba[3][tmp_pos]=0;
}
}
/* 计算需要向上填充的像素点的个数n */
n = radius+y-line_width;
/* 判断是否超过圆的x轴对称线 */
n = n<radius ? y:line_width;
if( radius+y > max_y ) {
n -= (radius+y-max_y);
}
/* 从上一行像素点开始 */
pos -= des->width;
if( radius+y - n < min_y ) {
n = min_y - radius - y;
}
/* 开始填充当前点下边的n-1个像素点 */
for(i=0; i<n-1; ++i,pos-=des->width) {
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
}
return 0;
}
static int
Graph_Draw_RoundBorder_LeftBottom(
LCUI_Graph *des, LCUI_Pos center,
int radius, int line_width,
LCUI_RGB line_color, LCUI_BOOL hide_outarea )
/* 绘制左下角的圆角，从左边框的下端到下边框的左端绘制一条圆角线 */
{
LCUI_Rect real_rect;
int pos, center_pos, y, x, i, n;
int max_x, max_y, min_x, min_y;
if( line_width <= 0 && !hide_outarea ) {
return 1;
}
real_rect = Graph_GetValidRect( des );
des = Graph_GetQuote( des );
if( !Graph_IsValid( des ) ) {
return -1;
}
max_x = radius*2;
if( center.x+radius > real_rect.x + real_rect.width ) {
max_x -= (center.x+radius-real_rect.x-real_rect.width);
}
if( max_x < 0 ) {
max_x = 0;
}
min_x = center.x>radius? 0:radius-center.x;
if( min_x < 0 ) {
min_x = 0;
}
max_y = radius*2;
if( center.y+radius > real_rect.y + real_rect.height ) {
max_y -= (center.y+radius-real_rect.y-real_rect.height);
}
min_y = center.y>radius? 0:radius-center.y;
if( min_y < 0 ) {
min_y = 0;
}
center_pos = (real_rect.y + center.y) * des->width;
center_pos = center_pos + center.x + real_rect.x;
if( hide_outarea && des->have_alpha ) {
}
for( y=0; y<=radius; ++y, center_pos += des->width ) {
if( radius+y >= max_y || radius+y < min_y ) {
continue;
}
x = (int)sqrt( pow(radius, 2) - y*y );
if( line_width > 0 && radius-x >= min_x
&& radius-x <= max_x ) {
pos = center_pos - x;
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
if( hide_outarea && des->have_alpha ) {
pos = center_pos - center.x;
if( radius-x > max_x ) {
n = max_x - min_x;
} else {
n = radius-x-min_x;
}
n += (center.x-radius);
for(i=0; i<n; ++i) {
des->rgba[3][pos++]=0;
}
}
n = radius-x+line_width;
n = n>radius ? x:line_width;
if( radius-x < min_x ) {
pos = center_pos - radius+min_x-1;
n -= (min_x-radius+x);
} else {
pos = center_pos - x;
}
++pos;
if( radius-x + n > max_x ) {
n = max_x - radius + x;
}
for(i=0; i<n-1; ++i,++pos) {
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
}
return 0;
}
static void DrawCircle( LCUI_Graph *graph, LCUI_Pos center,
int r, LCUI_ARGB color )
{
int x, y;
int t = r;
int s = 255;
float v = 512.0/t;
float a = 2*(v*t-s)/(t*t);
LCUI_Rect area, box_rect;
LCUI_Graph *src, box_graph;
LCUI_ARGB tmp_px, *px;
uchar_t *px_row_bytes;
LCUI_Rect2 circle;
tmp_px = color;
Graph_GetValidRect( graph, &area );
src = Graph_GetQuote( graph );
center.x += area.x;
center.y += area.y;
circle.r = center.x + r;
circle.l = center.x - r;
circle.b = center.y + r;
circle.t = center.y - r;
/* 先填充 圆外切矩形 外的矩形区域 */
box_rect.x = area.x;
box_rect.y = area.y;
box_rect.w = area.w;
box_rect.h = circle.t - area.y;
Graph_Quote( &box_graph, src, &box_rect );
Graph_FillAlpha( &box_graph, 0 );
box_rect.y = circle.t;
box_rect.w = circle.l - area.x;
box_rect.h = area.y + area.h - circle.t;
Graph_Quote( &box_graph, src, &box_rect );
Graph_FillAlpha( &box_graph, 0 );
/* 调整圆的区域 */
if( circle.l < area.x ) {
circle.l = area.x;
}
if( circle.t < area.y ) {
circle.t = area.y;
}
if( circle.r > area.x + area.w ) {
circle.r = area.x + area.w;
}
if( circle.b > area.y + area.h ) {
circle.b = area.y + area.h;
}
if( src->color_type != COLOR_TYPE_ARGB ) {
return;
}
px_row_bytes = src->bytes + circle.top*src->bytes_per_row;
px_row_bytes += circle.left * src->bytes_per_pixel;
/* 遍历区域内每个像素点，根据点到圆心的距离，计算其alpha透明度 */
for( y=circle.top; y<circle.bottom; ++y ) {
px = (LCUI_ARGB*)px_row_bytes;
for( x=circle.left; x<circle.right; ++x ) {
t = (y-center.y)*(y-center.y);
t += (x-center.x)*(x-center.x);
t = (int)((double)sqrt(1.0*t)+0.5);
if( t <= r ) {
tmp_px.a = (uchar_t)(s-(v*t-(a*t*t)/2));
tmp_px.a *= color.a/255.0;
} else {
tmp_px.alpha = 0;
}
*px++ = tmp_px;
}
px_row_bytes += src->bytes_per_row;
}
}
LCUI_API LCUI_Rect Graph_GetValidRect( LCUI_Graph *graph )
{
int x, y, w, h, temp;
LCUI_Rect rect, cut_rect;
x = cut_rect.x = graph->x;
y = cut_rect.y = graph->y;
cut_rect.width = graph->w;
cut_rect.height = graph->h;
if( !graph->quote ) {
return cut_rect;
} else {
w = graph->src->w;
h = graph->src->h;
}
/* 获取需裁剪的区域 */
if(x < 0) {
cut_rect.width += x;
cut_rect.x = 0 - x;
}
if(x + graph->w > w) {
cut_rect.width -= (x + graph->w - w);
}
if(y < 0) {
cut_rect.height += y;
cut_rect.y = 0 - y;
}
if(y + graph->h > h) {
cut_rect.height -= (y + graph->h - h);
}
/* 获取引用的图像的有效显示范围 */
rect = Graph_GetValidRect(graph->src);
/* 如果引用的图像需要裁剪，那么，该图像根据情况，也需要进行裁剪 */
if(rect.x > 0) {
temp = x + cut_rect.x;
if(temp < rect.x) {
temp = rect.x - x;
cut_rect.width -= (temp - cut_rect.x);
cut_rect.x = temp;
}
}
if(rect.y > 0) {
temp = y + cut_rect.y;
if(y < rect.y) {
temp = rect.y - y;
cut_rect.height -= (temp - cut_rect.y);
cut_rect.y = temp;
}
}
if(rect.width < w) {
temp = x + cut_rect.x + cut_rect.width;
if(temp > rect.x + rect.width) {
cut_rect.width -= (temp-(rect.x+rect.width));
}
}
if(rect.height < h) {
temp = y + cut_rect.y+cut_rect.height;
if(temp > rect.y+rect.height) {
cut_rect.height -= (temp-(rect.y+rect.height));
}
}
return cut_rect;
}
static int
Graph_Draw_RoundBorder_BottomRight(
LCUI_Graph *des, LCUI_Pos center,
int radius, int line_width,
LCUI_RGB line_color, LCUI_BOOL hide_outarea )
/* 绘制右下角的圆角，从下边框的右端到右边框的下端绘制一条圆角线 */
{
LCUI_Rect real_rect;
int pos, center_pos, y, x, i, n;
int max_x, max_y, min_x, min_y;
if( line_width <= 0 && !hide_outarea ) {
return 1;
}
real_rect = Graph_GetValidRect( des );
des = Graph_GetQuote( des );
if( !Graph_IsValid( des ) ) {
return -1;
}
max_x = radius*2;
if( center.x+radius > real_rect.x + real_rect.width ) {
max_x -= (center.x+radius-real_rect.x-real_rect.width);
}
if( max_x < 0 ) {
max_x = 0;
}
min_x = center.x>radius? 0:radius-center.x;
if( min_x < 0 ) {
min_x = 0;
}
max_y = radius*2;
if( center.y+radius > real_rect.y + real_rect.height ) {
max_y -= (center.y+radius-real_rect.y-real_rect.height);
}
min_y = center.y>radius? 0:radius-center.y;
if( min_y < 0 ) {
min_y = 0;
}
center_pos = (real_rect.y + center.y) * des->width;
center_pos = center_pos + center.x + real_rect.x;
for( x=0; x<=radius; ++x ) {
if( radius+x >= max_x || radius+x < min_x ) {
continue;
}
y = (int)sqrt( pow(radius, 2) - x*x );
if( line_width > 0 && radius+y >= min_y
&& radius+y < max_y ) {
pos = center_pos + y * des->width + x;
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
if( hide_outarea && des->have_alpha ) {
if( radius+y > max_y ) {
pos = center_pos;
pos += (max_y-radius)*des->width;
} else {
pos = center_pos + y * des->width + x;
}
if( radius+y < min_y ) {
n = max_y - min_y;
} else {
n = max_y-radius-y;
}
n += (real_rect.height-center.y-radius);
pos+=des->width;
for(i=0; i<n; ++i,pos+=des->width) {
des->rgba[3][pos]=0;
}
}
n = radius+y-line_width;
n = n<radius ? y:line_width;
if( radius+y > max_y ) {
pos = center_pos + (max_y-radius)*des->width;
n -= (radius+y-max_y);
} else {
pos = center_pos + y * des->width + x;
}
if( radius+y - n < min_y ) {
n = min_y - radius - y;
}
pos -= des->width;
for(i=0; i<n-1; ++i,pos-=des->width) {
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
}
return 0;
}
static int
Graph_Draw_RoundBorder_TopLeft(
LCUI_Graph *des, LCUI_Pos center,
int radius, int line_width,
LCUI_RGB line_color, LCUI_BOOL hide_outarea )
/* 绘制左上角的圆角，从上边框的左端到左边框的上端绘制一条圆角线 */
{
LCUI_Rect real_rect;
int pos, center_pos, y, x, i, n;
int max_x, max_y, min_x, min_y;
double tmp_pos;
uchar_t alpha[2];
if( line_width <= 0 && !hide_outarea ) {
return 1;
}
real_rect = Graph_GetValidRect( des );
des = Graph_GetQuote( des );
if( !Graph_IsValid( des ) ) {
return -1;
}
/* 预先计算xy轴坐标的有效范围 */
max_x = radius*2;
if( center.x+radius > real_rect.x + real_rect.width ) {
max_x -= (center.x+radius-real_rect.x-real_rect.width);
}
if( max_x < 0 ) {
max_x = 0;
}
min_x = center.x>radius? 0:radius-center.x;
if( min_x < 0 ) {
min_x = 0;
}
max_y = radius*2;
if( center.y+radius > real_rect.y + real_rect.height ) {
max_y -= (center.y+radius-real_rect.y-real_rect.height);
}
min_y = center.y>radius? 0:radius-center.y;
if( min_y < 0 ) {
min_y = 0;
}
center_pos = (real_rect.y + center.y) * des->width;
center_pos = center_pos + center.x + real_rect.x;
for( x=0; x<=radius; ++x ) {
if( radius-x >= max_x || radius-x < min_x ) {
continue;
}
tmp_pos = sqrt( pow(radius, 2) - x*x );
y = (int)tmp_pos;
alpha[1] =(uchar_t)( 255/(tmp_pos - y));
alpha[0] = 255-alpha[1];
if( line_width > 0 && radius-y >= min_y
&& radius-y <= max_y ) {
pos = center_pos - y * des->width - x;
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
if( hide_outarea && des->have_alpha ) {
/* 计算起点坐标 */
if( radius-y < min_y ) {
pos = center_pos;
pos -= ((radius+min_y-1)*des->width);
} else {
pos = center_pos - y * des->width - x;
}
if( radius-y > max_y ) {
n = max_y - min_y;
} else {
n = radius-y-min_y;
}
/* 加上圆与背景图的上边距 */
n += (center.y-radius);
pos-=des->width;
for(i=0; i<n; ++i,pos-=des->width) {
des->rgba[3][pos]=0;
}
}
/* 计算需要向下填充的像素点的个数n */
n = radius-y+line_width;
n = n>radius ? y:line_width;
if( radius-y < min_y ) {
/* 重新确定起点坐标pos和填充的像素点的个数n */
pos = center_pos - (radius+min_y-1)*des->width;
n -= (min_y-radius+y);
} else {
pos = center_pos - y * des->width - x;
}
/* 从下一行像素点开始 */
pos += des->width;
/* 如果填充的像素点超出了最大y轴范围 */
if( radius-y + n > max_y ) {
/* 重新确定需要填充的像素点的个数n */
n = max_y - radius + y;
}
/* 开始填充当前点下边的n-2个像素点 */
for(i=0; i<n-1; ++i,pos+=des->width) {
fill_pixel( des->rgba, pos, line_color );
if( des->have_alpha ) {
des->rgba[3][pos] = 255;
}
}
}
return 0;
}