/**
* 将色彩类型为RGB的前景图像，覆盖至色彩类型为RGBA的目标背景图像中
* param back
* 背景图像
* param des_rect
* 背景图像中的写入区域
* param fore
* 前景图像
* param src_pos
* 前景图像中的读取区域的坐标
* warning
* 此函数不会对传入的参数进行有效性判断，因为此函数主要被Graph_Replace函
* 数调用，Graph_Replace函数会预先进行参数有效性判断
*/
static int Graph_RGBReplaceRGBA( LCUI_Graph *back,
LCUI_Rect des_rect,
LCUI_Graph *fore,
LCUI_Pos src_pos )
{
int y;
int des_n, src_n;
LCUI_Graph *src, *des;
src = Graph_GetQuote(fore);
des = Graph_GetQuote(back);
src_n = src_pos.y * src->w + src_pos.x;
des_n = des_rect.y * des->w + des_rect.x;
for(y=0; y<des_rect.height; ++y) {
memcpy( &des->rgba[0][des_n], &src->rgba[0][src_n], des_rect.width );
memcpy( &des->rgba[1][des_n], &src->rgba[1][src_n], des_rect.width );
memcpy( &des->rgba[2][des_n], &src->rgba[2][src_n], des_rect.width );
memset( &des->rgba[3][des_n], src->alpha, des_rect.width );
des_n += des->w;
src_n += src->w;
}
return 0;
}
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;
}
/**
* 将色彩类型为RGBA的前景图像，覆盖至色彩类型为RGB的目标背景图像中
* param back
* 背景图像
* param des_rect
* 背景图像中的写入区域
* param fore
* 前景图像
* param src_pos
* 前景图像中的读取区域的坐标
* warning
* 此函数不会对传入的参数进行有效性判断，因为此函数主要被Graph_Replace函
* 数调用，Graph_Replace函数会预先进行参数有效性判断
*/
static int Graph_RGBAReplaceRGB( LCUI_Graph *back,
LCUI_Rect des_rect,
LCUI_Graph *fore,
LCUI_Pos src_pos )
{
int x, y;
int src_n, des_n;
int des_row_start, src_row_start;
LCUI_Graph *src, *des;
src = Graph_GetQuote(fore);
des = Graph_GetQuote(back);
src_row_start = src_pos.y * src->w + src_pos.x;
des_row_start = des_rect.y * des->w + des_rect.x;
for(y=0; y<des_rect.height; ++y) {
des_n = des_row_start;
src_n = src_row_start;
for(x=0; x<des_rect.width; ++x) {
des->rgba[0][des_n] = _ALPHA_BLEND( src->rgba[0][src_n], 255, src->rgba[3][src_n] );
des->rgba[1][des_n] = _ALPHA_BLEND( src->rgba[1][src_n], 255, src->rgba[3][src_n] );
des->rgba[2][des_n] = _ALPHA_BLEND( src->rgba[2][src_n], 255, src->rgba[3][src_n] );
++src_n;
++des_n;
}
des_row_start += des->w;
src_row_start += src->w;
}
return 0;
}
/**
* 将前景图像，直接覆盖目标背景图像中(两个图像的色彩类型相同)
* param back
* 背景图像
* param des_rect
* 背景图像中的写入区域
* param fore
* 前景图像
* param src_pos
* 前景图像中的读取区域的坐标
* warning
* 此函数不会对传入的参数进行有效性判断，因为此函数主要被Graph_Replace函
* 数调用，Graph_Replace函数会预先进行参数有效性判断
*/
static int Graph_DirectReplace( LCUI_Graph *back,
LCUI_Rect des_rect,
LCUI_Graph *fore,
LCUI_Pos src_pos )
{
int y;
int des_n, src_n;
LCUI_Graph *src, *des;
src = Graph_GetQuote(fore);
des = Graph_GetQuote(back);
src_n = src_pos.y * src->w + src_pos.x;
des_n = des_rect.y * des->w + des_rect.x;
for(y=0; y<des_rect.height; ++y) {
memcpy( &des->rgba[0][des_n], &src->rgba[0][src_n], des_rect.width );
memcpy( &des->rgba[1][des_n], &src->rgba[1][src_n], des_rect.width );
memcpy( &des->rgba[2][des_n], &src->rgba[2][src_n], des_rect.width );
if( des->color_type == src->color_type
&& des->color_type == COLOR_TYPE_RGBA ) {
memcpy( &des->rgba[3][des_n], &src->rgba[3][src_n], des_rect.width );
}
des_n += des->w;
src_n += src->w;
}
return 0;
}
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;
}
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;
}
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;
}
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 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;
}
LCUI_API void Graph_Free( LCUI_Graph *pic )
{
LCUI_Graph *p;
if( pic && pic->quote ) {
pic->src = NULL;
pic->quote = FALSE;
return;
}
p = Graph_GetQuote( pic );
if( !Graph_IsValid(p)) {
return;
}
LCUIMutex_Lock( &p->mutex );
free( p->rgba[0] );
free( p->rgba[1] );
free( p->rgba[2] );
if( p->color_type == COLOR_TYPE_RGBA ) {
free( p->rgba[3] );
}
free( p->rgba );
p->rgba = NULL;
p->w = 0;
p->h = 0;
LCUIMutex_Unlock( &p->mutex );
LCUIMutex_Destroy( &pic->mutex );
}
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;
}
LCUI_API LCUI_BOOL Graph_HaveAlpha( LCUI_Graph *graph )
{
graph = Graph_GetQuote(graph);
if( graph && graph->color_type == COLOR_TYPE_RGBA ) {
return TRUE;
}
return FALSE;
}
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 );
}
}
}
/*
* 功能：获取指向被引用的图形的指针
* 说明：如果当前图形引用了另一个图形，并且，该图形处于一条引用链中，那么，本函数会返
* 回指向被引用的最终图形的指针。
* */
LCUI_API LCUI_Graph* Graph_GetQuote( LCUI_Graph *graph )
{
if( !graph ) {
return NULL;
}
if( !graph->quote ) {
return graph;
}
return Graph_GetQuote(graph->src);
}
LCUI_API LCUI_BOOL Graph_IsValid( LCUI_Graph *graph )
{
LCUI_Graph *p;
p = Graph_GetQuote(graph);
if(p != NULL && p->rgba != NULL
&& p->h > 0 && p->w > 0 ) {
return TRUE;
}
return FALSE;
}
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;
}
void Graph_Copy( LCUI_Graph *des, const LCUI_Graph *src )
{
const LCUI_Graph *graph;
if( !des || !Graph_IsValid(src) ) {
return;
}
graph = Graph_GetQuote( src );
des->color_type = graph->color_type;
/* 创建合适尺寸的Graph */
Graph_Create( des, src->w, src->h );
Graph_Replace( des, src, Pos(0,0) );
des->opacity = src->opacity;
}
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;
}
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;
}
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;
}
/**
* 将色彩类型为RGBA的前景图像，覆盖至色彩类型为RGB的目标背景图像中
* 当背景图像没有alpha通道时，该函数使用白色背景与前景图像进行混合，并将源图像
* 的全局透明度计算在内
* param back
* 背景图像
* param des_rect
* 背景图像中的写入区域
* param fore
* 前景图像
* param src_pos
* 前景图像中的读取区域的坐标
* warning
* 此函数不会对传入的参数进行有效性判断，因为此函数主要被Graph_Replace函
* 数调用，Graph_Replace函数会预先进行参数有效性判断
*/
static int Graph_RGBAReplaceRGBWithGlobalAlpha( LCUI_Graph *back,
LCUI_Rect des_rect,
LCUI_Graph *fore,
LCUI_Pos src_pos )
{
int x, y;
double k;
uchar_t alpha;
int src_n, des_n;
int des_row_start, src_row_start;
LCUI_Graph *src, *des;
src = Graph_GetQuote(fore);
des = Graph_GetQuote(back);
k = 1.0 / src->alpha;
src_row_start = src_pos.y * src->w + src_pos.x;
des_row_start = des_rect.y * des->w + des_rect.x;
for(y=0; y<des_rect.height; ++y) {
des_n = des_row_start;
src_n = src_row_start;
for(x=0; x<des_rect.width; ++x) {
alpha = src->alpha * k;
des->rgba[0][des_n] = _ALPHA_BLEND( src->rgba[0][src_n], 255, alpha );
des->rgba[1][des_n] = _ALPHA_BLEND( src->rgba[1][src_n], 255, alpha );
des->rgba[2][des_n] = _ALPHA_BLEND( src->rgba[2][src_n], 255, alpha );
++src->w;
++des->w;
}
des_row_start += des->w;
src_row_start += src->w;
}
return 0;
}
void Graph_PrintInfo( LCUI_Graph *graph )
{
printf("address:%p\n", graph);
if( !graph ) {
return;
}
printf("width:%d, ", graph->w);
printf("height:%d, ", graph->h);
printf("opacity:%.2f, ", graph->opacity);
printf("%s\n", graph->color_type == COLOR_TYPE_ARGB ? "RGBA":"RGB");
if( graph->quote.is_valid ) {
printf("graph src:");
Graph_PrintInfo(Graph_GetQuote(graph));
}
}
LCUI_API void Graph_PrintInfo( LCUI_Graph *graph )
{
printf("address:%p\n", graph);
if( !graph ) {
return;
}
printf("width:%d, ", graph->w);
printf("height:%d, ", graph->h);
printf("alpha:%u, ", graph->alpha);
printf("%s\n", graph->color_type == COLOR_TYPE_RGBA ? "RGBA":"RGB");
if( graph->quote ) {
printf("graph src:");
Graph_PrintInfo(Graph_GetQuote(graph));
}
}
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;
}