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host_shaders: Modify shader cmake integration to allow for larger shaders

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using a raw string to encapsulate the entire shader code limits us to shaders of size less than 2KB. This change overcomes this limitation.
This commit is contained in:
ameerj 2021-02-13 15:52:21 -05:00
parent 2985e5e94c
commit f6566338eb
4 changed files with 27 additions and 8 deletions
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1
src/video_core/host_shaders/CMakeLists.txt
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@ -1,4 +1,5 @@
set(SHADER_FILES
astc_decoder.comp
block_linear_unswizzle_2d.comp
block_linear_unswizzle_3d.comp
convert_depth_to_float.frag

22
src/video_core/host_shaders/StringShaderHeader.cmake
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@ -6,7 +6,27 @@ get_filename_component(CONTENTS_NAME ${SOURCE_FILE} NAME)
string(REPLACE "." "_" CONTENTS_NAME ${CONTENTS_NAME})
string(TOUPPER ${CONTENTS_NAME} CONTENTS_NAME)
file(READ ${SOURCE_FILE} CONTENTS)
FILE(READ ${SOURCE_FILE} line_contents)
# Replace double quotes with single quotes,
# as double quotes will be used to wrap the lines
STRING(REGEX REPLACE "\"" "'" line_contents "${line_contents}")
# CMake separates list elements with semicolons, but semicolons
# are used extensively in the shader code.
# Replace with a temporary marker, to be reverted later.
STRING(REGEX REPLACE ";" "{{SEMICOLON}}" line_contents "${line_contents}")
# Make every line an individual element in the CMake list.
STRING(REGEX REPLACE "\n" ";" line_contents "${line_contents}")
# Build the shader string, wrapping each line in double quotes.
foreach(line IN LISTS line_contents)
string(CONCAT CONTENTS "${CONTENTS}" \"${line}\\n\"\n)
endforeach()
# Revert the original semicolons in the source.
STRING(REGEX REPLACE "{{SEMICOLON}}" ";" CONTENTS "${CONTENTS}")
get_filename_component(OUTPUT_DIR ${HEADER_FILE} DIRECTORY)
make_directory(${OUTPUT_DIR})

4
src/video_core/host_shaders/source_shader.h.in
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@ -4,6 +4,8 @@
namespace HostShaders {
constexpr std::string_view @CONTENTS_NAME@ = R"(@CONTENTS@)";
constexpr std::string_view @CONTENTS_NAME@ = {
@CONTENTS@
};
} // namespace HostShaders

8
src/video_core/renderer_opengl/util_shaders.cpp
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@ -14,6 +14,7 @@
#include "common/assert.h"
#include "common/common_types.h"
#include "common/div_ceil.h"
#include "video_core/host_shaders/astc_decoder_comp.h"
#include "video_core/host_shaders/block_linear_unswizzle_2d_comp.h"
#include "video_core/host_shaders/block_linear_unswizzle_3d_comp.h"
#include "video_core/host_shaders/opengl_copy_bc4_comp.h"
@ -62,17 +63,12 @@ size_t NumPixelsInCopy(const VideoCommon::ImageCopy& copy) {
} // Anonymous namespace
UtilShaders::UtilShaders(ProgramManager& program_manager_)
: program_manager{program_manager_},
: program_manager{program_manager_}, astc_decoder_program(MakeProgram(ASTC_DECODER_COMP)),
block_linear_unswizzle_2d_program(MakeProgram(BLOCK_LINEAR_UNSWIZZLE_2D_COMP)),
block_linear_unswizzle_3d_program(MakeProgram(BLOCK_LINEAR_UNSWIZZLE_3D_COMP)),
pitch_unswizzle_program(MakeProgram(PITCH_UNSWIZZLE_COMP)),
copy_bgra_program(MakeProgram(OPENGL_COPY_BGRA_COMP)),
copy_bc4_program(MakeProgram(OPENGL_COPY_BC4_COMP)) {
// TODO: Load shader string as a header
std::string astc_path = "astc_decoder.comp";
std::ifstream t(astc_path);
std::string str((std::istreambuf_iterator<char>(t)), std::istreambuf_iterator<char>());
astc_decoder_program = MakeProgram(str);
MakeBuffers();
}