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#     "distribution" have the same meaning here as under U.S.
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#     any additions or changes to the software.
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#     directly on its contribution.
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#     2. Grant of Rights
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#     3. Conditions and Limitations
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#     rights to use any contributor's name, logo, or trademarks.
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#     patents that you claim are infringed by the software, your
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#

# *** ptexViewer ***

set(SHADER_FILES
     shader.glsl
     shader_gl3.glsl
     skyshader.glsl
     imageshader.glsl
)

set(PLATFORM_LIBRARIES
    ${OSD_LINK_TARGET}
    ${OPENGL_LIBRARY}
    ${GLEW_LIBRARY}
    ${GLFW_LIBRARIES}
    ${PTEX_LIBRARY}
)

if (APPLE)
    list(APPEND PLATFORM_LIBRARIES -lz)
endif()

include_directories(
    ${PROJECT_SOURCE_DIR}/opensubdiv
    ${PROJECT_SOURCE_DIR}/regression
    ${GLEW_INCLUDE_DIR}
    ${GLFW_INCLUDE_DIR}
    ${PTEX_INCLUDE_DIR}
)

#-------------------------------------------------------------------------------
# Shader Stringification
# We want to use preprocessor include directives to include GLSL and OpenCL
# shader source files in cpp files, but since the sources contain newline
# characters we would need raw string literals from C++11 to do this directly.
# To avoid depending on C++11 we instead use a small tool called "line_quote"
# to generate source files that are suitable for direct inclusion.
foreach(shader_file ${SHADER_FILES})

    string(REGEX REPLACE ".*[.](.*)" "\\1" extension ${shader_file})

    string(REGEX REPLACE "(.*)[.].*" "\\1.inc" inc_file ${shader_file})
    list(APPEND INC_FILES ${inc_file})

    add_custom_command(
        OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/${inc_file}
        COMMAND stringify ${CMAKE_CURRENT_SOURCE_DIR}/${shader_file}
            ${CMAKE_CURRENT_SOURCE_DIR}/${inc_file}
        DEPENDS stringify ${CMAKE_CURRENT_SOURCE_DIR}/${shader_file}
    )
endforeach()

#-------------------------------------------------------------------------------
_add_glfw_executable(ptexViewer
   viewer.cpp
   ../common/font_image.cpp
   ../common/hud.cpp
   ../common/patchColors.cpp
   ../common/gl_hud.cpp
   ../common/hdr_reader.cpp
   ${SHADER_FILES}
   ${INC_FILES}
)

target_link_libraries(ptexViewer
    ${PLATFORM_LIBRARIES}
)

install(TARGETS ptexViewer DESTINATION ${CMAKE_BINDIR_BASE})