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/* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright 2020 Blender Foundation. */
/** \file
* \ingroup draw_engine
*/
#include "DRW_render.h"
#include "BLI_dynstr.h"
#include "BLI_string_utils.h"
#include "GPU_batch.h"
#include "GPU_index_buffer.h"
#include "GPU_vertex_buffer.h"
#include "draw_shader.h"
extern "C" char datatoc_common_hair_lib_glsl[];
extern "C" char datatoc_common_hair_refine_vert_glsl[];
extern "C" char datatoc_common_hair_refine_comp_glsl[];
extern "C" char datatoc_gpu_shader_3D_smooth_color_frag_glsl[];
static struct {
struct GPUShader *hair_refine_sh[PART_REFINE_MAX_SHADER];
struct GPUShader *debug_print_display_sh;
struct GPUShader *debug_draw_display_sh;
} e_data = {{nullptr}};
/* -------------------------------------------------------------------- */
/** \name Hair refinement
* \{ */
static GPUShader *hair_refine_shader_compute_create(ParticleRefineShader UNUSED(refinement))
{
return GPU_shader_create_from_info_name("draw_hair_refine_compute");
}
static GPUShader *hair_refine_shader_transform_feedback_create(
ParticleRefineShader UNUSED(refinement))
{
GPUShader *sh = nullptr;
std::string shader_src = std::string(datatoc_common_hair_lib_glsl) +
std::string(datatoc_common_hair_refine_vert_glsl);
const char *var_names[1] = {"finalColor"};
sh = DRW_shader_create_with_transform_feedback(shader_src.c_str(),
nullptr,
"#define HAIR_PHASE_SUBDIV\n"
"#define USE_TF\n",
GPU_SHADER_TFB_POINTS,
var_names,
1);
return sh;
}
static GPUShader *hair_refine_shader_transform_feedback_workaround_create(
ParticleRefineShader UNUSED(refinement))
{
return GPU_shader_create_from_info_name("draw_hair_refine_transform_feedback_workaround");
}
GPUShader *DRW_shader_hair_refine_get(ParticleRefineShader refinement,
eParticleRefineShaderType sh_type)
{
if (e_data.hair_refine_sh[refinement] == nullptr) {
GPUShader *sh = nullptr;
switch (sh_type) {
case PART_REFINE_SHADER_COMPUTE:
sh = hair_refine_shader_compute_create(refinement);
break;
case PART_REFINE_SHADER_TRANSFORM_FEEDBACK:
sh = hair_refine_shader_transform_feedback_create(refinement);
break;
case PART_REFINE_SHADER_TRANSFORM_FEEDBACK_WORKAROUND:
sh = hair_refine_shader_transform_feedback_workaround_create(refinement);
break;
default:
BLI_assert_msg(0, "Incorrect shader type");
}
e_data.hair_refine_sh[refinement] = sh;
}
return e_data.hair_refine_sh[refinement];
}
GPUShader *DRW_shader_curves_refine_get(CurvesEvalShader type, eParticleRefineShaderType sh_type)
{
/* TODO: Implement curves evaluation types (Bezier and Catmull Rom). */
if (e_data.hair_refine_sh[type] == nullptr) {
GPUShader *sh = nullptr;
switch (sh_type) {
case PART_REFINE_SHADER_COMPUTE:
sh = hair_refine_shader_compute_create(PART_REFINE_CATMULL_ROM);
break;
case PART_REFINE_SHADER_TRANSFORM_FEEDBACK:
sh = hair_refine_shader_transform_feedback_create(PART_REFINE_CATMULL_ROM);
break;
case PART_REFINE_SHADER_TRANSFORM_FEEDBACK_WORKAROUND:
sh = hair_refine_shader_transform_feedback_workaround_create(PART_REFINE_CATMULL_ROM);
break;
default:
BLI_assert_msg(0, "Incorrect shader type");
}
e_data.hair_refine_sh[type] = sh;
}
return e_data.hair_refine_sh[type];
}
GPUShader *DRW_shader_debug_print_display_get()
{
if (e_data.debug_print_display_sh == nullptr) {
e_data.debug_print_display_sh = GPU_shader_create_from_info_name("draw_debug_print_display");
}
return e_data.debug_print_display_sh;
}
GPUShader *DRW_shader_debug_draw_display_get()
{
if (e_data.debug_draw_display_sh == nullptr) {
e_data.debug_draw_display_sh = GPU_shader_create_from_info_name("draw_debug_draw_display");
}
return e_data.debug_draw_display_sh;
}
/** \} */
void DRW_shaders_free()
{
for (int i = 0; i < PART_REFINE_MAX_SHADER; i++) {
DRW_SHADER_FREE_SAFE(e_data.hair_refine_sh[i]);
}
DRW_SHADER_FREE_SAFE(e_data.debug_print_display_sh);
DRW_SHADER_FREE_SAFE(e_data.debug_draw_display_sh);
}
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