公开(公告)号：US20170358109A1

公开(公告)日：2017-12-14

申请号：US15179738

申请日：2016-06-10

Applicant: Apple Inc.

Inventor： Domenico Troiano ,  Michael Imbrogno

IPC: G06T11/00 ,  G06T1/60 ,  G06T1/20

CPC classification number: G06T1/60 ,  G06T15/005

Abstract: Systems, computer readable media, and methods for hardware accelerated blits of multisampled textures on graphics processing units (GPUs) are disclosed. For multisampled surfaces, texture-to-buffer blits cannot be trivially implemented because most GPUs do not support writing multisampled surfaces with a linear memory layout. Moreover, GPUs often have a maximum limit for row stride (i.e., the number of bytes from one row of pixels in memory to the next) and/or texture size. When the destination buffer for the blit of a multisampled texture is too large to be aliased by an equivalent non-multisampled texture view, the stride of the view has no spatial relationship with the destination buffer. Thus, to access the source texture correctly, a ‘remapping’ may be performed to determine the linear sample index of a fragment within the view, and the destination buffer stride may be used to compute the texture coordinates used to sample the source texture.

公开(公告)号：US10169887B2

公开(公告)日：2019-01-01

申请号：US15179738

申请日：2016-06-10

Applicant: Apple Inc.

Inventor： Domenico Troiano ,  Michael Imbrogno

IPC: G06T11/00 ,  G06T1/60 ,  G06T15/04

Abstract: Systems, computer readable media, and methods for hardware accelerated blits of multisampled textures on graphics processing units (GPUs) are disclosed. For multisampled surfaces, texture-to-buffer blits cannot be trivially implemented because most GPUs do not support writing multisampled surfaces with a linear memory layout. Moreover, GPUs often have a maximum limit for row stride (i.e., the number of bytes from one row of pixels in memory to the next) and/or texture size. When the destination buffer for the blit of a multisampled texture is too large to be aliased by an equivalent non-multisampled texture view, the stride of the view has no spatial relationship with the destination buffer. Thus, to access the source texture correctly, a ‘remapping’ may be performed to determine the linear sample index of a fragment within the view, and the destination buffer stride may be used to compute the texture coordinates used to sample the source texture.