diff options
9 files changed, 583 insertions, 2 deletions
diff --git a/servers/visual/rasterizer_rd/rasterizer_effects_rd.cpp b/servers/visual/rasterizer_rd/rasterizer_effects_rd.cpp index 121cc5b48a..11158db56f 100644 --- a/servers/visual/rasterizer_rd/rasterizer_effects_rd.cpp +++ b/servers/visual/rasterizer_rd/rasterizer_effects_rd.cpp @@ -164,6 +164,44 @@ void RasterizerEffectsRD::make_mipmap(RID p_source_rd_texture, RID p_dest_frameb RD::get_singleton()->draw_list_end(); } +void RasterizerEffectsRD::tonemapper(RID p_source_color, RID p_dst_framebuffer, const TonemapSettings &p_settings) { + + zeromem(&tonemap.push_constant, sizeof(TonemapPushConstant)); + + tonemap.push_constant.use_bcs = p_settings.use_bcs; + tonemap.push_constant.bcs[0] = p_settings.brightness; + tonemap.push_constant.bcs[1] = p_settings.contrast; + tonemap.push_constant.bcs[2] = p_settings.saturation; + + tonemap.push_constant.use_glow = p_settings.use_glow; + tonemap.push_constant.glow_intensity = p_settings.glow_intensity; + tonemap.push_constant.glow_level_flags = p_settings.glow_level_flags; + tonemap.push_constant.glow_texture_size[0] = p_settings.glow_texture_size.x; + tonemap.push_constant.glow_texture_size[1] = p_settings.glow_texture_size.y; + + TonemapMode mode = p_settings.glow_use_bicubic_upscale ? TONEMAP_MODE_BICUBIC_GLOW_FILTER : TONEMAP_MODE_NORMAL; + + tonemap.push_constant.tonemapper = p_settings.tonemap_mode; + tonemap.push_constant.use_auto_exposure = p_settings.use_auto_exposure; + tonemap.push_constant.exposure = p_settings.exposure; + tonemap.push_constant.white = p_settings.white; + tonemap.push_constant.auto_exposure_grey = p_settings.auto_exposure_grey; + + tonemap.push_constant.use_color_correction = p_settings.use_color_correction; + + RD::DrawListID draw_list = RD::get_singleton()->draw_list_begin(p_dst_framebuffer, RD::INITIAL_ACTION_KEEP_COLOR, RD::FINAL_ACTION_READ_COLOR_DISCARD_DEPTH); + RD::get_singleton()->draw_list_bind_render_pipeline(draw_list, tonemap.pipelines[mode].get_render_pipeline(RD::INVALID_ID, RD::get_singleton()->framebuffer_get_format(p_dst_framebuffer))); + RD::get_singleton()->draw_list_bind_uniform_set(draw_list, _get_uniform_set_from_texture(p_source_color), 0); + RD::get_singleton()->draw_list_bind_uniform_set(draw_list, _get_uniform_set_from_texture(p_settings.exposure_texture), 1); + RD::get_singleton()->draw_list_bind_uniform_set(draw_list, _get_uniform_set_from_texture(p_settings.glow_texture), 2); + RD::get_singleton()->draw_list_bind_uniform_set(draw_list, _get_uniform_set_from_texture(p_settings.color_correction_texture), 3); + RD::get_singleton()->draw_list_bind_index_array(draw_list, index_array); + + RD::get_singleton()->draw_list_set_push_constant(draw_list, &tonemap.push_constant, sizeof(TonemapPushConstant)); + RD::get_singleton()->draw_list_draw(draw_list, true); + RD::get_singleton()->draw_list_end(); +} + RasterizerEffectsRD::RasterizerEffectsRD() { { @@ -224,6 +262,21 @@ RasterizerEffectsRD::RasterizerEffectsRD() { sky.pipeline.setup(sky.shader.version_get_shader(sky.shader_version, 0), RD::RENDER_PRIMITIVE_TRIANGLES, RD::PipelineRasterizationState(), RD::PipelineMultisampleState(), depth_stencil_state, RD::PipelineColorBlendState::create_disabled(), 0); } + { + // Initialize tonemapper + Vector<String> tonemap_modes; + tonemap_modes.push_back("\n"); + tonemap_modes.push_back("\n#define USE_GLOW_FILTER_BICUBIC\n"); + + tonemap.shader.initialize(tonemap_modes); + + tonemap.shader_version = tonemap.shader.version_create(); + + for (int i = 0; i < TONEMAP_MODE_MAX; i++) { + tonemap.pipelines[i].setup(tonemap.shader.version_get_shader(tonemap.shader_version, i), RD::RENDER_PRIMITIVE_TRIANGLES, RD::PipelineRasterizationState(), RD::PipelineMultisampleState(), RD::PipelineDepthStencilState(), RD::PipelineColorBlendState::create_disabled(), 0); + } + } + RD::SamplerState sampler; sampler.mag_filter = RD::SAMPLER_FILTER_LINEAR; sampler.min_filter = RD::SAMPLER_FILTER_LINEAR; diff --git a/servers/visual/rasterizer_rd/rasterizer_effects_rd.h b/servers/visual/rasterizer_rd/rasterizer_effects_rd.h index 259eb32b76..5b54ddc18d 100644 --- a/servers/visual/rasterizer_rd/rasterizer_effects_rd.h +++ b/servers/visual/rasterizer_rd/rasterizer_effects_rd.h @@ -6,6 +6,8 @@ #include "servers/visual/rasterizer_rd/shaders/blur.glsl.gen.h" #include "servers/visual/rasterizer_rd/shaders/cubemap_roughness.glsl.gen.h" #include "servers/visual/rasterizer_rd/shaders/sky.glsl.gen.h" +#include "servers/visual/rasterizer_rd/shaders/tonemap.glsl.gen.h" +#include "servers/visual_server.h" class RasterizerEffectsRD { @@ -110,6 +112,40 @@ class RasterizerEffectsRD { RenderPipelineVertexFormatCacheRD pipeline; } sky; + enum TonemapMode { + TONEMAP_MODE_NORMAL, + TONEMAP_MODE_BICUBIC_GLOW_FILTER, + TONEMAP_MODE_MAX + }; + + struct TonemapPushConstant { + float bcs[3]; + uint32_t use_bcs; + + uint32_t use_glow; + uint32_t use_auto_exposure; + uint32_t use_color_correction; + uint32_t tonemapper; + + uint32_t glow_texture_size[2]; + + float glow_intensity; + uint32_t glow_level_flags; + uint32_t glow_mode; + + float exposure; + float white; + float auto_exposure_grey; + }; + + struct Tonemap { + + TonemapPushConstant push_constant; + TonemapShaderRD shader; + RID shader_version; + RenderPipelineVertexFormatCacheRD pipelines[TONEMAP_MODE_MAX]; + } tonemap; + RID default_sampler; RID index_buffer; RID index_array; @@ -125,6 +161,42 @@ public: void render_panorama(RD::DrawListID p_list, RenderingDevice::FramebufferFormatID p_fb_format, RID p_panorama, const CameraMatrix &p_camera, const Basis &p_orientation, float p_alpha, float p_multipler); void make_mipmap(RID p_source_rd_texture, RID p_framebuffer_half, const Vector2 &p_pixel_size); + struct TonemapSettings { + + bool use_glow = false; + enum GlowMode { + GLOW_MODE_ADD, + GLOW_MODE_SCREEN, + GLOW_MODE_SOFTLIGHT, + GLOW_MODE_REPLACE + }; + + GlowMode glow_mode = GLOW_MODE_ADD; + float glow_intensity = 1.0; + uint32_t glow_level_flags = 0; + Vector2i glow_texture_size; + bool glow_use_bicubic_upscale = false; + RID glow_texture; + + VS::EnvironmentToneMapper tonemap_mode = VS::ENV_TONE_MAPPER_LINEAR; + float exposure = 1.0; + float white = 1.0; + + bool use_auto_exposure = false; + float auto_exposure_grey = 0.5; + RID exposure_texture; + + bool use_bcs = false; + float brightness = 1.0; + float contrast = 1.0; + float saturation = 1.0; + + bool use_color_correction = false; + RID color_correction_texture; + }; + + void tonemapper(RID p_source_color, RID p_dst_framebuffer, const TonemapSettings &p_settings); + RasterizerEffectsRD(); ~RasterizerEffectsRD(); }; diff --git a/servers/visual/rasterizer_rd/rasterizer_scene_forward_rd.cpp b/servers/visual/rasterizer_rd/rasterizer_scene_forward_rd.cpp index b4c3e86194..d8d1f5ec5d 100644 --- a/servers/visual/rasterizer_rd/rasterizer_scene_forward_rd.cpp +++ b/servers/visual/rasterizer_rd/rasterizer_scene_forward_rd.cpp @@ -1912,7 +1912,23 @@ void RasterizerSceneForwardRD::_render_scene(RenderBufferData *p_buffer_data, co } RasterizerEffectsRD *effects = storage->get_effects(); - effects->copy(render_buffer->color, storage->render_target_get_rd_framebuffer(render_buffer->render_target), Rect2()); + + { + //tonemap + RasterizerEffectsRD::TonemapSettings tonemap; + + tonemap.color_correction_texture = storage->texture_rd_get_default(RasterizerStorageRD::DEFAULT_RD_TEXTURE_3D_WHITE); + tonemap.exposure_texture = storage->texture_rd_get_default(RasterizerStorageRD::DEFAULT_RD_TEXTURE_WHITE); + tonemap.glow_texture = storage->texture_rd_get_default(RasterizerStorageRD::DEFAULT_RD_TEXTURE_BLACK); + + if (is_environment(p_environment)) { + tonemap.tonemap_mode = environment_get_tonemapper(p_environment); + tonemap.white = environment_get_white(p_environment); + tonemap.exposure = environment_get_exposure(p_environment); + } + effects->tonemapper(render_buffer->color, storage->render_target_get_rd_framebuffer(render_buffer->render_target), tonemap); + } + storage->render_target_disable_clear_request(render_buffer->render_target); #if 0 diff --git a/servers/visual/rasterizer_rd/rasterizer_scene_rd.cpp b/servers/visual/rasterizer_rd/rasterizer_scene_rd.cpp index ab63cd9343..97e3f9cdb6 100644 --- a/servers/visual/rasterizer_rd/rasterizer_scene_rd.cpp +++ b/servers/visual/rasterizer_rd/rasterizer_scene_rd.cpp @@ -358,6 +358,60 @@ VS::EnvironmentReflectionSource RasterizerSceneRD::environment_get_reflection_so return env->reflection_source; } +void RasterizerSceneRD::environment_set_tonemap(RID p_env, VS::EnvironmentToneMapper p_tone_mapper, float p_exposure, float p_white, bool p_auto_exposure, float p_min_luminance, float p_max_luminance, float p_auto_exp_speed, float p_auto_exp_scale) { + Environent *env = environment_owner.getornull(p_env); + ERR_FAIL_COND(!env); + env->tone_mapper = p_tone_mapper; + env->auto_exposure = p_auto_exposure; + env->white = p_white; + env->min_luminance = p_min_luminance; + env->max_luminance = p_max_luminance; + env->auto_exp_speed = p_auto_exp_speed; + env->auto_exp_scale = p_auto_exp_scale; +} + +VS::EnvironmentToneMapper RasterizerSceneRD::environment_get_tonemapper(RID p_env) const { + Environent *env = environment_owner.getornull(p_env); + ERR_FAIL_COND_V(!env, VS::ENV_TONE_MAPPER_LINEAR); + return env->tone_mapper; +} +float RasterizerSceneRD::environment_get_exposure(RID p_env) const { + Environent *env = environment_owner.getornull(p_env); + ERR_FAIL_COND_V(!env, 0); + return env->exposure; +} +float RasterizerSceneRD::environment_get_white(RID p_env) const { + Environent *env = environment_owner.getornull(p_env); + ERR_FAIL_COND_V(!env, 0); + return env->white; +} +bool RasterizerSceneRD::environment_get_auto_exposure(RID p_env) const { + Environent *env = environment_owner.getornull(p_env); + ERR_FAIL_COND_V(!env, false); + return env->auto_exposure; +} +float RasterizerSceneRD::environment_get_min_luminance(RID p_env) const { + Environent *env = environment_owner.getornull(p_env); + ERR_FAIL_COND_V(!env, 0); + return env->min_luminance; +} +float RasterizerSceneRD::environment_get_max_luminance(RID p_env) const { + Environent *env = environment_owner.getornull(p_env); + ERR_FAIL_COND_V(!env, 0); + return env->max_luminance; +} +float RasterizerSceneRD::environment_get_auto_exposure_scale(RID p_env) const { + Environent *env = environment_owner.getornull(p_env); + ERR_FAIL_COND_V(!env, 0); + return env->auto_exp_scale; +} + +float RasterizerSceneRD::environment_get_auto_exposure_speed(RID p_env) const { + Environent *env = environment_owner.getornull(p_env); + ERR_FAIL_COND_V(!env, 0); + return env->auto_exp_speed; +} + bool RasterizerSceneRD::is_environment(RID p_env) const { return environment_owner.owns(p_env); } diff --git a/servers/visual/rasterizer_rd/rasterizer_scene_rd.h b/servers/visual/rasterizer_rd/rasterizer_scene_rd.h index 59f28a167f..c333c4b10c 100644 --- a/servers/visual/rasterizer_rd/rasterizer_scene_rd.h +++ b/servers/visual/rasterizer_rd/rasterizer_scene_rd.h @@ -54,6 +54,7 @@ private: struct Environent { + // BG VS::EnvironmentBG background = VS::ENV_BG_CLEAR_COLOR; RID sky; float sky_custom_fov = 0.0; @@ -66,6 +67,17 @@ private: float ambient_light_energy = 1.0; float ambient_sky_contribution = 1.0; VS::EnvironmentReflectionSource reflection_source = VS::ENV_REFLECTION_SOURCE_BG; + + /// Tonemap + + VS::EnvironmentToneMapper tone_mapper; + float exposure = 1.0; + float white = 1.0; + bool auto_exposure = false; + float min_luminance = 0.2; + float max_luminance = 8.0; + float auto_exp_speed = 0.2; + float auto_exp_scale = 0.5; }; mutable RID_Owner<Environent> environment_owner; @@ -138,7 +150,15 @@ public: void environment_set_ssr(RID p_env, bool p_enable, int p_max_steps, float p_fade_int, float p_fade_out, float p_depth_tolerance, bool p_roughness) {} void environment_set_ssao(RID p_env, bool p_enable, float p_radius, float p_intensity, float p_radius2, float p_intensity2, float p_bias, float p_light_affect, float p_ao_channel_affect, const Color &p_color, VS::EnvironmentSSAOQuality p_quality, VS::EnvironmentSSAOBlur p_blur, float p_bilateral_sharpness) {} - void environment_set_tonemap(RID p_env, VS::EnvironmentToneMapper p_tone_mapper, float p_exposure, float p_white, bool p_auto_exposure, float p_min_luminance, float p_max_luminance, float p_auto_exp_speed, float p_auto_exp_scale) {} + void environment_set_tonemap(RID p_env, VS::EnvironmentToneMapper p_tone_mapper, float p_exposure, float p_white, bool p_auto_exposure, float p_min_luminance, float p_max_luminance, float p_auto_exp_speed, float p_auto_exp_scale); + VS::EnvironmentToneMapper environment_get_tonemapper(RID p_env) const; + float environment_get_exposure(RID p_env) const; + float environment_get_white(RID p_env) const; + bool environment_get_auto_exposure(RID p_env) const; + float environment_get_min_luminance(RID p_env) const; + float environment_get_max_luminance(RID p_env) const; + float environment_get_auto_exposure_scale(RID p_env) const; + float environment_get_auto_exposure_speed(RID p_env) const; void environment_set_adjustment(RID p_env, bool p_enable, float p_brightness, float p_contrast, float p_saturation, RID p_ramp) {} diff --git a/servers/visual/rasterizer_rd/rasterizer_storage_rd.cpp b/servers/visual/rasterizer_rd/rasterizer_storage_rd.cpp index d28d2245cb..5ed90490dc 100644 --- a/servers/visual/rasterizer_rd/rasterizer_storage_rd.cpp +++ b/servers/visual/rasterizer_rd/rasterizer_storage_rd.cpp @@ -2653,6 +2653,61 @@ RasterizerStorageRD::RasterizerStorageRD() { default_rd_textures[DEFAULT_RD_TEXTURE_CUBEMAP_BLACK] = RD::get_singleton()->texture_create(tformat, RD::TextureView(), vpv); } } + + { //create default 3D + + RD::TextureFormat tformat; + tformat.format = RD::DATA_FORMAT_R8G8B8A8_UNORM; + tformat.width = 4; + tformat.height = 4; + tformat.depth = 4; + tformat.usage_bits = RD::TEXTURE_USAGE_SAMPLING_BIT | RD::TEXTURE_USAGE_CAN_UPDATE_BIT; + tformat.type = RD::TEXTURE_TYPE_3D; + + PoolVector<uint8_t> pv; + pv.resize(64 * 4); + for (int i = 0; i < 64; i++) { + pv.set(i * 4 + 0, 0); + pv.set(i * 4 + 1, 0); + pv.set(i * 4 + 2, 0); + pv.set(i * 4 + 3, 0); + } + + { + Vector<PoolVector<uint8_t> > vpv; + vpv.push_back(pv); + default_rd_textures[DEFAULT_RD_TEXTURE_3D_WHITE] = RD::get_singleton()->texture_create(tformat, RD::TextureView(), vpv); + } + } + + { //create default cubemap array + + RD::TextureFormat tformat; + tformat.format = RD::DATA_FORMAT_R8G8B8A8_UNORM; + tformat.width = 4; + tformat.height = 4; + tformat.array_layers = 6; + tformat.usage_bits = RD::TEXTURE_USAGE_SAMPLING_BIT | RD::TEXTURE_USAGE_CAN_UPDATE_BIT; + tformat.type = RD::TEXTURE_TYPE_CUBE_ARRAY; + + PoolVector<uint8_t> pv; + pv.resize(16 * 4); + for (int i = 0; i < 16; i++) { + pv.set(i * 4 + 0, 0); + pv.set(i * 4 + 1, 0); + pv.set(i * 4 + 2, 0); + pv.set(i * 4 + 3, 0); + } + + { + Vector<PoolVector<uint8_t> > vpv; + for (int i = 0; i < 6; i++) { + vpv.push_back(pv); + } + default_rd_textures[DEFAULT_RD_TEXTURE_CUBEMAP_BLACK] = RD::get_singleton()->texture_create(tformat, RD::TextureView(), vpv); + } + } + //default samplers for (int i = 1; i < VS::CANVAS_ITEM_TEXTURE_FILTER_MAX; i++) { for (int j = 1; j < VS::CANVAS_ITEM_TEXTURE_REPEAT_MAX; j++) { diff --git a/servers/visual/rasterizer_rd/rasterizer_storage_rd.h b/servers/visual/rasterizer_rd/rasterizer_storage_rd.h index 1e9c137f6d..4059331790 100644 --- a/servers/visual/rasterizer_rd/rasterizer_storage_rd.h +++ b/servers/visual/rasterizer_rd/rasterizer_storage_rd.h @@ -79,6 +79,7 @@ public: DEFAULT_RD_TEXTURE_MULTIMESH_BUFFER, DEFAULT_RD_TEXTURE_CUBEMAP_BLACK, DEFAULT_RD_TEXTURE_CUBEMAP_ARRAY_BLACK, + DEFAULT_RD_TEXTURE_3D_WHITE, DEFAULT_RD_TEXTURE_MAX }; diff --git a/servers/visual/rasterizer_rd/shaders/SCsub b/servers/visual/rasterizer_rd/shaders/SCsub index e8a62d0660..0a4bebcfbc 100644 --- a/servers/visual/rasterizer_rd/shaders/SCsub +++ b/servers/visual/rasterizer_rd/shaders/SCsub @@ -9,4 +9,5 @@ if 'RD_GLSL' in env['BUILDERS']: env.RD_GLSL('cubemap_roughness.glsl'); env.RD_GLSL('scene_forward.glsl'); env.RD_GLSL('sky.glsl'); + env.RD_GLSL('tonemap.glsl'); diff --git a/servers/visual/rasterizer_rd/shaders/tonemap.glsl b/servers/visual/rasterizer_rd/shaders/tonemap.glsl new file mode 100644 index 0000000000..284c934cf6 --- /dev/null +++ b/servers/visual/rasterizer_rd/shaders/tonemap.glsl @@ -0,0 +1,309 @@ +/* clang-format off */ +[vertex] +/* clang-format on */ + +#version 450 + +/* clang-format off */ +VERSION_DEFINES +/* clang-format on */ + +layout(location = 0) out vec2 uv_interp; + +void main() { + + vec2 base_arr[4] = vec2[](vec2(0.0,0.0),vec2(0.0,1.0),vec2(1.0,1.0),vec2(1.0,0.0)); + uv_interp = base_arr[gl_VertexIndex]; + gl_Position = vec4( uv_interp *2.0 - 1.0, 0.0, 1.0); +} + +/* clang-format off */ +[fragment] + +/* clang-format on */ + + +#version 450 + +/* clang-format off */ +VERSION_DEFINES +/* clang-format on */ + +layout(location =0) in vec2 uv_interp; + +layout( set=0, binding=0 ) uniform sampler2D source_color; +layout( set=1, binding=0 ) uniform sampler2D source_auto_exposure; +layout( set=2, binding=0 ) uniform sampler2D source_glow; +layout( set=3, binding=0 ) uniform sampler3D color_correction; + +layout(push_constant, binding = 1, std430) uniform Params { + vec3 bcs; + bool use_bcs; + + bool use_glow; + bool use_auto_exposure; + bool use_color_correction; + uint tonemapper; + + uvec2 glow_texture_size; + + float glow_intensity; + uint glow_level_flags; + uint glow_mode; + + float exposure; + float white; + float auto_exposure_grey; + +} params; + +layout(location = 0) out vec4 frag_color; + +#ifdef USE_GLOW_FILTER_BICUBIC +// w0, w1, w2, and w3 are the four cubic B-spline basis functions +float w0(float a) { + return (1.0f / 6.0f) * (a * (a * (-a + 3.0f) - 3.0f) + 1.0f); +} + +float w1(float a) { + return (1.0f / 6.0f) * (a * a * (3.0f * a - 6.0f) + 4.0f); +} + +float w2(float a) { + return (1.0f / 6.0f) * (a * (a * (-3.0f * a + 3.0f) + 3.0f) + 1.0f); +} + +float w3(float a) { + return (1.0f / 6.0f) * (a * a * a); +} + +// g0 and g1 are the two amplitude functions +float g0(float a) { + return w0(a) + w1(a); +} + +float g1(float a) { + return w2(a) + w3(a); +} + +// h0 and h1 are the two offset functions +float h0(float a) { + return -1.0f + w1(a) / (w0(a) + w1(a)); +} + +float h1(float a) { + return 1.0f + w3(a) / (w2(a) + w3(a)); +} + + +vec4 texture2D_bicubic(sampler2D tex, vec2 uv, int p_lod) { + float lod = float(p_lod); + vec2 tex_size = vec2(params.glow_texture_size >> p_lod); + vec2 pixel_size = vec2(1.0f) / tex_size; + + uv = uv * tex_size + vec2(0.5f); + + vec2 iuv = floor(uv); + vec2 fuv = fract(uv); + + float g0x = g0(fuv.x); + float g1x = g1(fuv.x); + float h0x = h0(fuv.x); + float h1x = h1(fuv.x); + float h0y = h0(fuv.y); + float h1y = h1(fuv.y); + + vec2 p0 = (vec2(iuv.x + h0x, iuv.y + h0y) - vec2(0.5f)) * pixel_size; + vec2 p1 = (vec2(iuv.x + h1x, iuv.y + h0y) - vec2(0.5f)) * pixel_size; + vec2 p2 = (vec2(iuv.x + h0x, iuv.y + h1y) - vec2(0.5f)) * pixel_size; + vec2 p3 = (vec2(iuv.x + h1x, iuv.y + h1y) - vec2(0.5f)) * pixel_size; + + return (g0(fuv.y) * (g0x * textureLod(tex, p0, lod) + g1x * textureLod(tex, p1, lod))) + + (g1(fuv.y) * (g0x * textureLod(tex, p2, lod) + g1x * textureLod(tex, p3, lod))); +} + +#define GLOW_TEXTURE_SAMPLE(m_tex, m_uv, m_lod) texture2D_bicubic(m_tex, m_uv, m_lod) + +#else + +#define GLOW_TEXTURE_SAMPLE(m_tex, m_uv, m_lod) textureLod(m_tex, m_uv, float(m_lod)) + +#endif + +vec3 tonemap_filmic(vec3 color, float white) { + // exposure bias: input scale (color *= bias, white *= bias) to make the brightness consistent with other tonemappers + // also useful to scale the input to the range that the tonemapper is designed for (some require very high input values) + // has no effect on the curve's general shape or visual properties + const float exposure_bias = 2.0f; + const float A = 0.22f * exposure_bias * exposure_bias; // bias baked into constants for performance + const float B = 0.30f * exposure_bias; + const float C = 0.10f; + const float D = 0.20f; + const float E = 0.01f; + const float F = 0.30f; + + vec3 color_tonemapped = ((color * (A * color + C * B) + D * E) / (color * (A * color + B) + D * F)) - E / F; + float white_tonemapped = ((white * (A * white + C * B) + D * E) / (white * (A * white + B) + D * F)) - E / F; + + return color_tonemapped / white_tonemapped, vec3(0.0f), vec3(1.0f); +} + +vec3 tonemap_aces(vec3 color, float white) { + const float exposure_bias = 0.85f; + const float A = 2.51f * exposure_bias * exposure_bias; + const float B = 0.03f * exposure_bias; + const float C = 2.43f * exposure_bias * exposure_bias; + const float D = 0.59f * exposure_bias; + const float E = 0.14f; + + vec3 color_tonemapped = (color * (A * color + B)) / (color * (C * color + D) + E); + float white_tonemapped = (white * (A * white + B)) / (white * (C * white + D) + E); + + return color_tonemapped / white_tonemapped, vec3(0.0f), vec3(1.0f); +} + +vec3 tonemap_reinhard(vec3 color, float white) { + return (white * color + color) / (color * white + white); +} + +vec3 linear_to_srgb(vec3 color) { // convert linear rgb to srgb, assumes clamped input in range [0;1] + const vec3 a = vec3(0.055f); + return mix((vec3(1.0f) + a) * pow(color.rgb, vec3(1.0f / 2.4f)) - a, 12.92f * color.rgb, lessThan(color.rgb, vec3(0.0031308f))); +} + +#define TONEMAPPER_LINEAR 0 +#define TONEMAPPER_REINHARD 1 +#define TONEMAPPER_FILMIC 2 +#define TONEMAPPER_ACES 3 + +vec3 apply_tonemapping(vec3 color, float white) { // inputs are LINEAR, always outputs clamped [0;1] color + + if (params.tonemapper==TONEMAPPER_LINEAR) { + return color; + } else if (params.tonemapper==TONEMAPPER_REINHARD) { + return tonemap_reinhard(color, white); + } else if (params.tonemapper==TONEMAPPER_FILMIC) { + return tonemap_filmic(color, white); + } else { //aces + return tonemap_aces(color, white); + } +} + +vec3 gather_glow(sampler2D tex, vec2 uv) { // sample all selected glow levels + vec3 glow = vec3(0.0f); + + if (bool(params.glow_level_flags&(1<<0))) { + glow += GLOW_TEXTURE_SAMPLE(tex, uv, 1).rgb; + } + + if (bool(params.glow_level_flags&(1<<1))) { + glow += GLOW_TEXTURE_SAMPLE(tex, uv, 2).rgb; + } + + if (bool(params.glow_level_flags&(1<<2))) { + glow += GLOW_TEXTURE_SAMPLE(tex, uv, 3).rgb; + } + + if (bool(params.glow_level_flags&(1<<3))) { + glow += GLOW_TEXTURE_SAMPLE(tex, uv, 4).rgb; + } + + if (bool(params.glow_level_flags&(1<<4))) { + glow += GLOW_TEXTURE_SAMPLE(tex, uv, 5).rgb; + } + + if (bool(params.glow_level_flags&(1<<5))) { + glow += GLOW_TEXTURE_SAMPLE(tex, uv, 6).rgb; + } + + if (bool(params.glow_level_flags&(1<<6))) { + glow += GLOW_TEXTURE_SAMPLE(tex, uv, 7).rgb; + } + + return glow; +} + +#define GLOW_MODE_ADD 0 +#define GLOW_MODE_SCREEN 1 +#define GLOW_MODE_SOFTLIGHT 2 +#define GLOW_MODE_REPLACE 3 + +vec3 apply_glow(vec3 color, vec3 glow) { // apply glow using the selected blending mode + if (params.glow_mode==GLOW_MODE_ADD) { + return color + glow; + } else if (params.glow_mode==GLOW_MODE_SCREEN) { + //need color clamping + color = clamp(color,0.0,1.0); + glow = clamp(glow,0.0,1.0); + + return max((color + glow) - (color * glow), vec3(0.0)); + } else if ( params.glow_mode==GLOW_MODE_SOFTLIGHT) { + //need color clamping + color = clamp(color,0.0,1.0); + glow = clamp(glow,0.0,1.0); + + glow = glow * vec3(0.5f) + vec3(0.5f); + + color.r = (glow.r <= 0.5f) ? (color.r - (1.0f - 2.0f * glow.r) * color.r * (1.0f - color.r)) : (((glow.r > 0.5f) && (color.r <= 0.25f)) ? (color.r + (2.0f * glow.r - 1.0f) * (4.0f * color.r * (4.0f * color.r + 1.0f) * (color.r - 1.0f) + 7.0f * color.r)) : (color.r + (2.0f * glow.r - 1.0f) * (sqrt(color.r) - color.r))); + color.g = (glow.g <= 0.5f) ? (color.g - (1.0f - 2.0f * glow.g) * color.g * (1.0f - color.g)) : (((glow.g > 0.5f) && (color.g <= 0.25f)) ? (color.g + (2.0f * glow.g - 1.0f) * (4.0f * color.g * (4.0f * color.g + 1.0f) * (color.g - 1.0f) + 7.0f * color.g)) : (color.g + (2.0f * glow.g - 1.0f) * (sqrt(color.g) - color.g))); + color.b = (glow.b <= 0.5f) ? (color.b - (1.0f - 2.0f * glow.b) * color.b * (1.0f - color.b)) : (((glow.b > 0.5f) && (color.b <= 0.25f)) ? (color.b + (2.0f * glow.b - 1.0f) * (4.0f * color.b * (4.0f * color.b + 1.0f) * (color.b - 1.0f) + 7.0f * color.b)) : (color.b + (2.0f * glow.b - 1.0f) * (sqrt(color.b) - color.b))); + return color; + } else { //replace + return glow; + } +} + +vec3 apply_bcs(vec3 color, vec3 bcs) { + color = mix(vec3(0.0f), color, bcs.x); + color = mix(vec3(0.5f), color, bcs.y); + color = mix(vec3(dot(vec3(1.0f), color) * 0.33333f), color, bcs.z); + + return color; +} + +vec3 apply_color_correction(vec3 color, sampler3D correction_tex) { + return texture(correction_tex,color).rgb; +} + +void main() { + vec3 color = textureLod(source_color, uv_interp, 0.0f).rgb; + + // Exposure + + if (params.use_auto_exposure) { + color /= texelFetch(source_auto_exposure, ivec2(0, 0), 0).r / params.auto_exposure_grey; + } + + color *= params.exposure; + + // Early Tonemap & SRGB Conversion + + color = apply_tonemapping(color, params.white); + + color = linear_to_srgb(color); // regular linear -> SRGB conversion + + // Glow + + if (params.use_glow) { + + vec3 glow = gather_glow(source_glow, uv_interp) * params.glow_intensity; + + // high dynamic range -> SRGB + glow = apply_tonemapping(glow, params.white); + glow = linear_to_srgb(glow); + + color = apply_glow(color, glow); + } + + // Additional effects + + if (params.use_bcs) { + color = apply_bcs(color, params.bcs); + } + + if (params.use_color_correction) { + color = apply_color_correction(color, color_correction); + } + + frag_color = vec4(color, 1.0f); +} |