ALPHA-TO-COVERAGE VALUE DETERMINATION USING VIRTUAL SAMPLES
    1.
    发明申请
    ALPHA-TO-COVERAGE VALUE DETERMINATION USING VIRTUAL SAMPLES 有权
    使用虚拟样品的ALPHA到覆盖值确定

    公开(公告)号:US20110090251A1

    公开(公告)日:2011-04-21

    申请号:US12904935

    申请日:2010-10-14

    IPC分类号: G09G5/00

    摘要: One embodiment of the present invention sets forth a technique for converting alpha values into pixel coverage masks. Geometric coverage is sampled at a number of “real” sample positions within each pixel. Color and depth values are computed for each of these real samples. Fragment alpha values are used to determine an alpha coverage mask for the real samples and additional “virtual” samples, in which the number of bits set in the mask bits is proportional to the alpha value. An alpha-to-coverage mode uses the virtual samples to increase the number of transparency levels for each pixel compared with using only real samples. The alpha-to-coverage mode may be used in conjunction with virtual coverage anti-aliasing to provide higher-quality transparency for rendering anti-aliased images.

    摘要翻译: 本发明的一个实施例提出了一种将α值转换为像素覆盖掩码的技术。 在每个像素内的多个“实”样本位置采样几何覆盖。 为这些实际样本中的每一个计算颜色和深度值。 片段α值用于确定实际样本和附加“虚拟”样本的alpha覆盖掩码,其中掩码位中设置的位数与alpha值成比例。 与仅使用真实样本相比,alpha到覆盖模式使用虚拟样本来增加每个像素的透明度级别数。 alpha到覆盖模式可以与虚拟覆盖抗锯齿一起使用,以提供用于渲染抗锯齿图像的更高质量的透明度。

    Alpha-to-coverage value determination using virtual samples
    3.
    发明授权
    Alpha-to-coverage value determination using virtual samples 有权
    使用虚拟样本的Alpha到覆盖值确定

    公开(公告)号:US08669999B2

    公开(公告)日:2014-03-11

    申请号:US12904935

    申请日:2010-10-14

    IPC分类号: G09G5/00

    摘要: One embodiment of the present invention sets forth a technique for converting alpha values into pixel coverage masks. Geometric coverage is sampled at a number of “real” sample positions within each pixel. Color and depth values are computed for each of these real samples. Fragment alpha values are used to determine an alpha coverage mask for the real samples and additional “virtual” samples, in which the number of bits set in the mask bits is proportional to the alpha value. An alpha-to-coverage mode uses the virtual samples to increase the number of transparency levels for each pixel compared with using only real samples. The alpha-to-coverage mode may be used in conjunction with virtual coverage anti-aliasing to provide higher-quality transparency for rendering anti-aliased images.

    摘要翻译: 本发明的一个实施例提出了一种将α值转换为像素覆盖掩码的技术。 在每个像素内的多个“实”样本位置采样几何覆盖。 为这些实际样本中的每一个计算颜色和深度值。 片段α值用于确定实际样本和附加“虚拟”样本的alpha覆盖掩码,其中掩码位中设置的位数与alpha值成比例。 与仅使用真实样本相比,alpha到覆盖模式使用虚拟样本来增加每个像素的透明度级别数。 alpha到覆盖模式可以与虚拟覆盖抗锯齿一起使用,以提供用于渲染抗锯齿图像的更高质量的透明度。

    Cull before vertex attribute fetch and vertex lighting
    4.
    发明授权
    Cull before vertex attribute fetch and vertex lighting 有权
    在顶点属性获取和顶点照明之前进行Cull

    公开(公告)号:US08564616B1

    公开(公告)日:2013-10-22

    申请号:US12505402

    申请日:2009-07-17

    IPC分类号: G09G5/00

    摘要: One embodiment of the invention sets forth a mechanism for compiling a vertex shader program into two portions, a culling portion and a shading portion. The culling portion of the compiled vertex shader program specifies vertex attributes and instructions of the vertex shader program needed to determine whether early vertex culling operations should be performed on a batch of vertices associated with one or more primitives of a graphics scene. The shading portion of the compiled vertex shader program specifies the remaining vertex attributes and instructions of the vertex shader program for performing vertex lighting and performing other operations on the vertices in the batch of vertices. When the compiled vertex shader program is executed by graphics processing hardware, the shading portion of the compiled vertex shader is executed only when early vertex culling operations are not performed on the batch of vertices.

    摘要翻译: 本发明的一个实施例提出了一种用于将顶点着色器程序编译成两部分,一个剔除部分和一个阴影部分的机构。 编译的顶点着色器程序的剔除部分指定顶点着色器程序的顶点属性和指令,以确定是否应对与图形场景的一个或多个图元相关联的一批顶点执行早期顶点剔除操作。 编译顶点着色器程序的阴影部分指定顶点着色器程序的剩余顶点属性和指令,用于执行顶点点亮,并对顶点的顶点中的顶点执行其他操作。 当编译的顶点着色器程序由图形处理硬件执行时,只有在不对顶点顶点执行早期顶点剔除操作时才执行编译顶点着色器的阴影部分。