Specifies a scissor rectangle. 更多...
头: | #include <QRhiScissor> |
CMake: |
find_package(Qt6 REQUIRED COMPONENTS Gui)
target_link_libraries(mytarget PRIVATE Qt6::Gui) |
qmake: | QT += gui |
Since: | Qt 6.6 |
QRhiScissor () | |
QRhiScissor (int x , int y , int w , int h ) | |
std::array<int, 4> | scissor () const |
void | setScissor (int x , int y , int w , int h ) |
size_t | qHash (const QRhiScissor & v , size_t seed = 0) |
bool | operator!= (const QRhiScissor & a , const QRhiScissor & b ) |
bool | operator== (const QRhiScissor & a , const QRhiScissor & b ) |
Used with QRhiCommandBuffer::setScissor (). Setting a scissor rectangle is only possible with a QRhiGraphicsPipeline that has QRhiGraphicsPipeline::UsesScissor set.
QRhi assumes OpenGL-style scissor coordinates, meaning x and y are bottom-left. Negative width or height are not allowed. However, apart from that, the flexible OpenGL semantics apply: negative x and y, partially out of bounds rectangles, etc. will be handled gracefully, clamping as appropriate. Therefore, any rendering logic targeting OpenGL can feed scissor rectangles into QRhiScissor as-is, without any adaptation.
注意: This is a RHI API with limited compatibility guarantees, see QRhi 了解细节。
另请参阅 QRhiCommandBuffer::setScissor () 和 QRhiViewport .
[constexpr noexcept]
QRhiScissor::
QRhiScissor
()
Constructs an empty scissor.
Constructs a scissor with the rectangle specified by x , y , w ,和 h .
注意: x and y are assumed to be the bottom-left position. Negative w or h are not allowed, such scissor rectangles will be ignored by QRhiCommandBuffer . Other than that, the flexible OpenGL semantics apply: negative x and y, partially out of bounds rectangles, etc. will be handled gracefully, clamping as appropriate.
Returns the scissor position and size.
另请参阅 setScissor ().
Sets the scissor position and size to x , y , w , h .
注意: The position is always expected to be specified in a coordinate system that has its origin in the bottom-left corner, like OpenGL.
另请参阅 scissor ().
[noexcept]
size_t
qHash
(const
QRhiScissor
&
v
,
size_t
seed
= 0)
返回哈希值为 v ,使用 seed 做计算种子。
[noexcept]
bool
operator!=
(const
QRhiScissor
&
a
, const
QRhiScissor
&
b
)
返回
false
if the values in the two
QRhiScissor
对象
a
and
b
相等;否则返回
true
.
[noexcept]
bool
operator==
(const
QRhiScissor
&
a
, const
QRhiScissor
&
b
)
返回
true
if the values in the two
QRhiScissor
对象
a
and
b
相等。