sdl2-config.in
author Sam Lantinga
Sun, 05 Apr 2020 08:58:47 -0700
changeset 13689 c3055b205671
parent 7876 d6373384b5ce
child 13729 89a457159af4
permissions -rw-r--r--
Fixed bug 5015 - SDL_RenderReadPixels on DirectX 11.1 backend seems to be broken

Konrad

It appears that I cannot use SDL_RenderReadPixels on a bound framebuffer (SDL_Texture set as render target) as it simply results in gibberish data. However, drawing that framebuffer into the default target (window surface) does render it correctly. Other backends (OpenGL, software, Direct3D) do work fine.

It looks to me like D3D11_RenderReadPixels just gets the general backbuffer and not the current render target and its backbuffer.

Here is the patch which actually fetches the current render target and its underlying ID3D11Resource which is ID3D11Texture2D.
     1 #!/bin/sh
     2 
     3 prefix=@prefix@
     4 exec_prefix=@exec_prefix@
     5 exec_prefix_set=no
     6 libdir=@libdir@
     7 
     8 @ENABLE_STATIC_FALSE@usage="\
     9 @ENABLE_STATIC_FALSE@Usage: $0 [--prefix[=DIR]] [--exec-prefix[=DIR]] [--version] [--cflags] [--libs]"
    10 @ENABLE_STATIC_TRUE@usage="\
    11 @ENABLE_STATIC_TRUE@Usage: $0 [--prefix[=DIR]] [--exec-prefix[=DIR]] [--version] [--cflags] [--libs] [--static-libs]"
    12 
    13 if test $# -eq 0; then
    14       echo "${usage}" 1>&2
    15       exit 1
    16 fi
    17 
    18 while test $# -gt 0; do
    19   case "$1" in
    20   -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
    21   *) optarg= ;;
    22   esac
    23 
    24   case $1 in
    25     --prefix=*)
    26       prefix=$optarg
    27       if test $exec_prefix_set = no ; then
    28         exec_prefix=$optarg
    29       fi
    30       ;;
    31     --prefix)
    32       echo $prefix
    33       ;;
    34     --exec-prefix=*)
    35       exec_prefix=$optarg
    36       exec_prefix_set=yes
    37       ;;
    38     --exec-prefix)
    39       echo $exec_prefix
    40       ;;
    41     --version)
    42       echo @SDL_VERSION@
    43       ;;
    44     --cflags)
    45       echo -I@includedir@/SDL2 @SDL_CFLAGS@
    46       ;;
    47 @ENABLE_SHARED_TRUE@    --libs)
    48 @ENABLE_SHARED_TRUE@      echo -L@libdir@ @SDL_RLD_FLAGS@ @SDL_LIBS@
    49 @ENABLE_SHARED_TRUE@      ;;
    50 @ENABLE_STATIC_TRUE@@ENABLE_SHARED_TRUE@    --static-libs)
    51 @ENABLE_STATIC_TRUE@@ENABLE_SHARED_FALSE@    --libs|--static-libs)
    52 @ENABLE_STATIC_TRUE@      echo -L@libdir@ @SDL_RLD_FLAGS@ @SDL_STATIC_LIBS@
    53 @ENABLE_STATIC_TRUE@      ;;
    54     *)
    55       echo "${usage}" 1>&2
    56       exit 1
    57       ;;
    58   esac
    59   shift
    60 done