mirror of
https://github.com/libretro/RetroArch.git
synced 2024-05-20 13:27:22 -04:00
7b711214a7
Adds support for sub-frame shaders to vulkan/glcore/dx10-11-12. Builds on the concept already present for frame duplication in use for BFI, to present multiple 'sub' frames per real frame to the shaders, so they can run at a higher framerate than the content framerate. Must be enabled via subframe shaders setting under synchronization settings to be active. Will allow BFI to be implemented inside of the shaders, among any other use for the higher framerate shader authors can devise. CurrentSubFrame and TotalSubFrames have been available inside the shaders to track what they want to do on an given subframe. TotalSubFrames will always be 1 when the setting is disabled (and when in menu/ff/pause). Framecount will not increment on sub-frames, as it does not for injected bfi frames now. Should not interfere with any existing shaders that do not check for subframes.
165 lines
4.3 KiB
C
165 lines
4.3 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2019 - Hans-Kristian Arntzen
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef SHADER_GL_CORE_H
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#define SHADER_GL_CORE_H
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#include <stdint.h>
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#include <stddef.h>
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#include <boolean.h>
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#include <retro_common_api.h>
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#include <glsym/glsym.h>
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#include "glslang_util.h"
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RETRO_BEGIN_DECLS
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typedef struct gl3_filter_chain gl3_filter_chain_t;
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struct gl3_filter_chain_texture
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{
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GLuint image;
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unsigned width;
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unsigned height;
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unsigned padded_width;
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unsigned padded_height;
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GLenum format;
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};
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struct gl3_viewport
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{
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GLint x;
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GLint y;
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GLsizei width;
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GLsizei height;
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};
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struct gl3_filter_chain_pass_info
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{
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/* Maximum number of mip-levels to use. */
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unsigned max_levels;
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float scale_x;
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float scale_y;
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/* Ignored for the last pass, swapchain info
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* will be used instead. */
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GLenum rt_format;
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/* For the last pass, make sure VIEWPORT scale
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* with scale factors of 1 are used. */
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enum glslang_filter_chain_scale scale_type_x;
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enum glslang_filter_chain_scale scale_type_y;
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/* The filter to use for source in this pass. */
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enum glslang_filter_chain_filter source_filter;
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enum glslang_filter_chain_filter mip_filter;
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enum glslang_filter_chain_address address;
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};
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struct gl3_buffer_locations
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{
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GLint flat_ubo_vertex;
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GLint flat_ubo_fragment;
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GLint flat_push_vertex;
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GLint flat_push_fragment;
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GLuint buffer_index_ubo_vertex;
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GLuint buffer_index_ubo_fragment;
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};
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gl3_filter_chain_t *gl3_filter_chain_new(void);
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void gl3_filter_chain_free(
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gl3_filter_chain_t *chain);
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void gl3_filter_chain_set_shader(
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gl3_filter_chain_t *chain,
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unsigned pass,
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GLenum shader_type,
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const uint32_t *spirv,
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size_t spirv_words);
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void gl3_filter_chain_set_pass_info(
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gl3_filter_chain_t *chain,
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unsigned pass,
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const struct gl3_filter_chain_pass_info *info);
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bool gl3_filter_chain_init(gl3_filter_chain_t *chain);
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void gl3_filter_chain_set_input_texture(
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gl3_filter_chain_t *chain,
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const struct gl3_filter_chain_texture *texture);
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void gl3_filter_chain_set_frame_count(
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gl3_filter_chain_t *chain,
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uint64_t count);
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void gl3_filter_chain_set_frame_count_period(
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gl3_filter_chain_t *chain,
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unsigned pass,
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unsigned period);
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void gl3_filter_chain_set_frame_direction(
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gl3_filter_chain_t *chain,
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int32_t direction);
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void gl3_filter_chain_set_rotation(
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gl3_filter_chain_t *chain,
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uint32_t rotation);
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void gl3_filter_chain_set_shader_subframes(
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gl3_filter_chain_t *chain,
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uint32_t tot_subframes);
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void gl3_filter_chain_set_current_shader_subframe(
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gl3_filter_chain_t *chain,
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uint32_t cur_subframe);
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void gl3_filter_chain_set_pass_name(
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gl3_filter_chain_t *chain,
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unsigned pass,
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const char *name);
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void gl3_filter_chain_build_offscreen_passes(
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gl3_filter_chain_t *chain,
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const struct gl3_viewport *vp);
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void gl3_filter_chain_build_viewport_pass(
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gl3_filter_chain_t *chain,
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const struct gl3_viewport *vp,
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const float *mvp);
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gl3_filter_chain_t *gl3_filter_chain_create_default(
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enum glslang_filter_chain_filter filter);
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gl3_filter_chain_t *gl3_filter_chain_create_from_preset(
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const char *path,
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enum glslang_filter_chain_filter filter);
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struct video_shader *gl3_filter_chain_get_preset(
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gl3_filter_chain_t *chain);
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void gl3_filter_chain_end_frame(gl3_filter_chain_t *chain);
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GLuint gl3_cross_compile_program(
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const uint32_t *vertex,
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size_t vertex_size,
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const uint32_t *fragment,
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size_t fragment_size,
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struct gl3_buffer_locations *loc,
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bool flatten);
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RETRO_END_DECLS
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#endif
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