Overview ======== The Shaders Mod makes use of a deferred rendering pipeline. The gbuffer shaders come first in the pipeline. They render data to textures that will be sent to the composite shaders. Optional composite shaders can be added after the shadow map (shadowcomp), before terrain (prepare) and before water rendering (deferred). The composite shaders then render to textures that will be sent to the final shader. The final shader renders directly to the screen. Shader Files ============ All shader files are placed in the folder "shaders" of the shader pack. The shader source files use the name of the program in which they are to be used with extension depending on their type. Extension Type ========================== .csh Compute shader .vsh Vertex shader .gsh Geometry shader .fsh Fragment shader Geometry shaders need either OpenGL 3.2 with layout qualifiers or the extension GL_ARB_geometry_shader4 (GL_EXT_geometry_shader4) with configuration "maxVerticesOut". Color Attachments ================= The data is passed from shader to shader using color attachments. There are at least 4 for all machines. For machines that can support it, there are up to 16. MacOS is limited to 8 color attachments, even with modern GPUs. In the deferred, composite and final shaders, these are referenced by the gcolor, gdepth, gnormal, composite, gaux1, gaux2, gaux3 and gaux4 uniforms. (colortex0 to colortex15 can be used instead of gcolor, gdepth etc.) Despite the naming, all of these color attachments are the same and can be used for any purpose with the exception of the first two. The first one, gcolor has its color cleared to the current fog color before rendering. The second one, gdepth has its color cleared to solid white before rendering and uses a higher precision storage buffer suitable for storing depth values. The rest have their color cleared to black with 0 alpha. Each color attachment uses 2 buffers (A and B) with logical names "main" and "alt", which can be used as ping-pong buffers. When the buffers are flipped the mapping between main/alt and A/B is reversed. Gbuffer programs always read from "main" (only gaux1-4) and write to "main" buffers (they shouldn't read and write to the same buffer at the same time). Deferred/composite programs always read from "main" and write to "alt" buffers. After a deferred/composite program is rendered the buffers that it writes to are flipped so the next programs can see the current output as input. The property "flip..=" can be used to enable or disable the flip independant of the buffer write. The virtual programs "deferred_pre" and "composite_pre" can be used for buffer flipping before the deferred/composite pass. Output color attachments are configured with the "/* DRAWBUFFERS:XYZ */" or "/* RENDERTARGETS: X,Y,Z */" comment, placed in the fragment shader. Gbuffers, deferred and composite programs can write to any color attachment, but no more than 8 at the same time. If the output color attachments are not configured, then the program will write to the first 8 color attachments. When writing to the color attachments in the composite shader, blending is disabled. Writing to color attachments that the composite shader also reads from will generate artifacts (unless you just copy the original contents) The shaders configuration parsing is affected by the preprocessor conditional compilation directives. The following preprocessor directives are currently recognized: #define #undef #ifdef #ifndef #if #if defined #if !defined #elif #elif defined #elif !defined #else #endif The current shaderpack can be reloaded by pressing "F3+R" or using the command "/reloadShaders". Compute Shaders =============== A list of compute shaders can be attached to every program except gbuffers programs. They are named like the program with optional suffix, for example "composite.csh", "composite_a.csh" ... "composite_z.csh". Compute shaders run before the program and can read from all buffers using texture samplers. They can read and write to colortex0-5 and shadowcolor0-1 buffers as images using the aliases colorimg0-5 and shadowcolorimg0-1, for example "layout (rgba8) uniform image2D colorimg0;" Compute shaders need at least "#version 430" and local size definition, for example: "layout (local_size_x = 16, local_size_y = 16) in;". Work groups are defined either fixed via "const ivec3 workGroups = ivec3(50, 30, 1);" or relative to render size via "const vec2 workGroupsRender = vec2(0.5f, 0.5f);". The default configuration is "const vec2 workGroupsRender = vec2(1.0f, 1.0f);", which executes the compute shader once per pixel. Image access ============ All programs can read and write to colorimg0-5 and shadowcolorimg0-1 using imageLoad() and imageStore(). Shader Programs =============== Name Render When not defined use ======================================================================================== gui, menus --- Shadow map --- shadow everything in shadow pass shadow_solid shadow shadow_cutout shadow --- Shadow composite --- shadowcomp shadowcomp1 ... shadowcomp99 --- Prepare --- prepare prepare1 ... prepare99 --- GBuffers --- gbuffers_basic leash, block selection box gbuffers_line block outline, fishing line gbuffers_basic gbuffers_textured particles gbuffers_basic gbuffers_textured_lit lit_particles, world border gbuffers_textured gbuffers_skybasic sky, horizon, stars, void gbuffers_basic gbuffers_skytextured sun, moon gbuffers_textured gbuffers_clouds clouds gbuffers_textured gbuffers_terrain solid, cutout, cutout_mip gbuffers_textured_lit gbuffers_terrain_solid gbuffers_terrain gbuffers_terrain_cutout_mip gbuffers_terrain gbuffers_terrain_cutout gbuffers_terrain gbuffers_damagedblock damaged_blocks gbuffers_terrain gbuffers_block block_entities gbuffers_terrain gbuffers_beaconbeam beacon beam gbuffers_textured gbuffers_item gbuffers_textured_lit gbuffers_entities entities gbuffers_textured_lit gbuffers_entities_glowing glowing entities, spectral effect gbuffers_entities gbuffers_armor_glint glint on armor and handheld items gbuffers_textured gbuffers_spidereyes eyes of spider, enderman and dragon gbuffers_textured gbuffers_hand hand and opaque handheld objects gbuffers_textured_lit gbuffers_weather rain, snow gbuffers_textured_lit --- Deferred --- deferred_pre flip ping-pong buffers deferred deferred1 ... deferred99 --- GBuffers translucent --- gbuffers_water translucent gbuffers_terrain gbuffers_hand_water translucent handheld objects gbuffers_hand --- Composite --- composite_pre flip ping-pong buffers composite composite1 ... composite99 --- Final --- final Remarks: - The programs shadow_solid, shadow_cutout, gbuffers_terrain_solid, gbuffers_terrain_cutout and gbuffers_terrain_cutout_mip are not used Todo: - Separate programs for world border, entities (by id, by type), cape, elytra, wolf collar, etc. Attributes ========== Source Value Comment ====================================================================================================================================================================== in vec3 vaPosition; position (x, y, z) 1.17+, for terrain it is relative to the chunk origin, see "chunkOffset" in vec4 vaColor; color (r, g, b, a) 1.17+ in vec2 vaUV0; texture (u, v) 1.17+ in ivec2 vaUV1; overlay (u, v) 1.17+ in ivec2 vaUV2; lightmap (u, v) 1.17+ in vec3 vaNormal; normal (x, y, z) 1.17+ in vec3 mc_Entity; xy = blockId, renderType "blockId" is used only for blocks specified in "block.properties" in vec2 mc_midTexCoord; st = midTexU, midTexV Sprite middle UV coordinates in vec4 at_tangent; xyz = tangent vector, w = handedness in vec3 at_velocity; vertex offset to previous frame In view space, only for entities and block entities in vec3 at_midBlock; offset to block center in 1/64m units Only for blocks Uniforms ========== Source Value ===================================================================================================================================================================== uniform int heldItemId; held item ID (main hand), used only for items defined in "item.properties" uniform int heldBlockLightValue; held item light value (main hand) uniform int heldItemId2; held item ID (off hand), used only for items defined in "item.properties" uniform int heldBlockLightValue2; held item light value (off hand) uniform int fogMode; GL_LINEAR, GL_EXP or GL_EXP2 uniform float fogDensity; 0.0-1.0 uniform vec3 fogColor; r, g, b uniform vec3 skyColor; r, g, b uniform int worldTime; = worldTicks % 24000 uniform int worldDay; = worldTicks / 24000 uniform int moonPhase; 0-7 uniform int frameCounter; Frame index (0 to 720719, then resets to 0) uniform float frameTime; last frame time, seconds uniform float frameTimeCounter; run time, seconds (resets to 0 after 3600s) uniform float sunAngle; 0.0-1.0 uniform float shadowAngle; 0.0-1.0 uniform float rainStrength; 0.0-1.0 uniform float aspectRatio; viewWidth / viewHeight uniform float viewWidth; viewWidth uniform float viewHeight; viewHeight uniform float near; near viewing plane distance uniform float far; far viewing plane distance uniform vec3 sunPosition; sun position in eye space uniform vec3 moonPosition; moon position in eye space uniform vec3 shadowLightPosition; shadow light (sun or moon) position in eye space uniform vec3 upPosition; direction up uniform vec3 cameraPosition; camera position in world space uniform vec3 previousCameraPosition; last frame cameraPosition uniform mat4 gbufferModelView; modelview matrix after setting up the camera transformations uniform mat4 gbufferModelViewInverse; inverse gbufferModelView uniform mat4 gbufferPreviousModelView; last frame gbufferModelView uniform mat4 gbufferProjection; projection matrix when the gbuffers were generated uniform mat4 gbufferProjectionInverse; inverse gbufferProjection uniform mat4 gbufferPreviousProjection; last frame gbufferProjection uniform mat4 shadowProjection; projection matrix when the shadow map was generated uniform mat4 shadowProjectionInverse; inverse shadowProjection uniform mat4 shadowModelView; modelview matrix when the shadow map was generated uniform mat4 shadowModelViewInverse; inverse shadowModelView uniform float wetness; rainStrength smoothed with wetnessHalfLife or drynessHalfLife uniform float eyeAltitude; view entity Y position uniform ivec2 eyeBrightness; x = block brightness, y = sky brightness, light 0-15 = brightness 0-240 uniform ivec2 eyeBrightnessSmooth; eyeBrightness smoothed with eyeBrightnessHalflife uniform ivec2 terrainTextureSize; not used uniform int terrainIconSize; not used uniform int isEyeInWater; 1 = camera is in water, 2 = camera is in lava, 3 = camera is in powder snow uniform float nightVision; night vision (0.0-1.0) uniform float blindness; blindness (0.0-1.0) uniform float screenBrightness; screen brightness (0.0-1.0) uniform int hideGUI; GUI is hidden uniform float centerDepthSmooth; centerDepth smoothed with centerDepthSmoothHalflife uniform ivec2 atlasSize; texture atlas size (only set when the atlas texture is bound) uniform vec4 spriteBounds; sprite bounds in the texture atlas (u0, v0, u1, v1), set when MC_ANISOTROPIC_FILTERING is enabled uniform vec4 entityColor; entity color multiplier (entity hurt, creeper flashing when exploding) uniform int entityId; entity ID uniform int blockEntityId; block entity ID (block ID for the tile entity, only for blocks specified in "block.properties") uniform ivec4 blendFunc; blend function (srcRGB, dstRGB, srcAlpha, dstAlpha) uniform int instanceId; instance ID when instancing is enabled (countInstances > 1), 0 = original, 1-N = copies uniform float playerMood; player mood (0.0-1.0), increases the longer a player stays underground uniform int renderStage; render stage, see "Standard Macros", "J. Render stages" // 1.17+ uniform mat4 modelViewMatrix; model view matrix uniform mat4 modelViewMatrixInverse; inverse model view matrix uniform mat4 projectionMatrix; projection matrix uniform mat4 projectionMatrixInverse; inverse projection matrix uniform mat4 textureMatrix = mat4(1.0); texture matrix, default is identity uniform mat3 normalMatrix; normal matrix uniform vec3 chunkOffset; terrain chunk origin, used with attribute "vaPosition" uniform float alphaTestRef; alpha test reference value, the check is "if (color.a < alphaTestRef) discard;" Constants ===================================================================================================================================================================== // Lightmap texture matrix, 1.17+ const mat4 TEXTURE_MATRIX_2 = mat4(vec4(0.00390625, 0.0, 0.0, 0.0), vec4(0.0, 0.00390625, 0.0, 0.0), vec4(0.0, 0.0, 0.00390625, 0.0), vec4(0.03125, 0.03125, 0.03125, 1.0)); GBuffers Uniforms ================= Programs: basic, textured, textured_lit, skybasic, skytextured, clouds, terrain, terrain_solid, terrain_cutout_mip, terrain_cutout, damagedblock, water, block, beaconbeam, item, entities, armor_glint, spidereyes, hand, hand_water, weather) ================== Source Value ===================================================================================================================================================================== uniform sampler2D texture; 0 uniform sampler2D lightmap; 1 uniform sampler2D normals; 2 uniform sampler2D specular; 3 uniform sampler2D shadow; waterShadowEnabled ? 5 : 4 uniform sampler2D watershadow; 4 uniform sampler2D shadowtex0; 4 uniform sampler2D shadowtex1; 5 uniform sampler2D depthtex0; 6 uniform sampler2D gaux1; 7 uniform sampler2D gaux2; 8 uniform sampler2D gaux3; 9 uniform sampler2D gaux4; 10 uniform sampler2D colortex4; 7 uniform sampler2D colortex5; 8 uniform sampler2D colortex6; 9 uniform sampler2D colortex7; 10 uniform sampler2D colortex8; 16 uniform sampler2D colortex9; 17 uniform sampler2D colortex10; 18 uniform sampler2D colortex11; 19 uniform sampler2D colortex12; 20 uniform sampler2D colortex13; 21 uniform sampler2D colortex14; 22 uniform sampler2D colortex15; 23 uniform sampler2D depthtex1; 11 uniform sampler2D shadowcolor; 13 uniform sampler2D shadowcolor0; 13 uniform sampler2D shadowcolor1; 14 uniform sampler2D noisetex; 15 Shadow Uniforms ================== Programs: shadow, shadow_solid, shadow_cutout ================== Source Value ===================================================================================================================================================================== uniform sampler2D tex; 0 uniform sampler2D texture; 0 uniform sampler2D lightmap; 1 uniform sampler2D normals; 2 uniform sampler2D specular; 3 uniform sampler2D shadow; waterShadowEnabled ? 5 : 4 uniform sampler2D watershadow; 4 uniform sampler2D shadowtex0; 4 uniform sampler2D shadowtex1; 5 uniform sampler2D gaux1; 7 uniform sampler2D gaux2; 8 uniform sampler2D gaux3; 9 uniform sampler2D gaux4; 10 uniform sampler2D colortex4; 7 uniform sampler2D colortex5; 8 uniform sampler2D colortex6; 9 uniform sampler2D colortex7; 10 uniform sampler2D colortex8; 16 uniform sampler2D colortex9; 17 uniform sampler2D colortex10; 18 uniform sampler2D colortex11; 19 uniform sampler2D colortex12; 20 uniform sampler2D colortex13; 21 uniform sampler2D colortex14; 22 uniform sampler2D colortex15; 23 uniform sampler2D shadowcolor; 13 uniform sampler2D shadowcolor0; 13 uniform sampler2D shadowcolor1; 14 uniform sampler2D noisetex; 15 Composite and Deferred Uniforms =============================== Programs: composite, composite1, composite2, composite3, composite4, composite5, composite6, composite7, final, deferred, deferred1, deferred2, deferred3, deferred4, deferred5, deferred6, deferred7 =============================== Source Value ===================================================================================================================================================================== uniform sampler2D gcolor; 0 uniform sampler2D gdepth; 1 uniform sampler2D gnormal; 2 uniform sampler2D composite; 3 uniform sampler2D gaux1; 7 uniform sampler2D gaux2; 8 uniform sampler2D gaux3; 9 uniform sampler2D gaux4; 10 uniform sampler2D colortex0; 0 uniform sampler2D colortex1; 1 uniform sampler2D colortex2; 2 uniform sampler2D colortex3; 3 uniform sampler2D colortex4; 7 uniform sampler2D colortex5; 8 uniform sampler2D colortex6; 9 uniform sampler2D colortex7; 10 uniform sampler2D colortex8; 16 uniform sampler2D colortex9; 17 uniform sampler2D colortex10; 18 uniform sampler2D colortex11; 19 uniform sampler2D colortex12; 20 uniform sampler2D colortex13; 21 uniform sampler2D colortex14; 22 uniform sampler2D colortex15; 23 uniform sampler2D shadow; waterShadowEnabled ? 5 : 4 uniform sampler2D watershadow; 4 uniform sampler2D shadowtex0; 4 uniform sampler2D shadowtex1; 5 uniform sampler2D gdepthtex; 6 uniform sampler2D depthtex0; 6 uniform sampler2D depthtex1; 11 uniform sampler2D depthtex2; 12 uniform sampler2D shadowcolor; 13 uniform sampler2D shadowcolor0; 13 uniform sampler2D shadowcolor1; 14 uniform sampler2D noisetex; 15 GBuffers Textures ================= Id Name Legacy name ====================================== 0 texture 1 lightmap 2 normals 3 specular 4 shadowtex0 shadow, watershadow 5 shadowtex1 shadow (when watershadow used) 6 depthtex0 7 gaux1 colortex4 8 gaux2 colortex5 9 gaux3 colortex6 10 gaux4 colortex7 12 depthtex1 13 shadowcolor0 shadowcolor 14 shadowcolor1 15 noisetex 16 colortex8 17 colortex9 18 colortex10 19 colortex11 20 colortex12 21 colortex13 22 colortex14 23 colortex15 Shadow Textures ================== Id Name Legacy name ====================================== 0 texture tex 1 lightmap 2 normals 3 specular 4 shadowtex0 shadow, watershadow 5 shadowtex1 shadow (when watershadow used) 7 gaux1 colortex4 8 gaux2 colortex5 9 gaux3 colortex6 10 gaux4 colortex7 13 shadowcolor0 shadowcolor 14 shadowcolor1 15 noisetex 16 colortex8 17 colortex9 18 colortex10 19 colortex11 20 colortex12 21 colortex13 22 colortex14 23 colortex15 Composite and Deferred Textures =============================== Id Name Legacy name ====================================== 0 colortex0 gcolor 1 colortex1 gdepth 2 colortex2 gnormal 3 colortex3 composite 4 shadowtex0 shadow, watershadow 5 shadowtex1 shadow (when watershadow used) 6 depthtex0 gdepthtex 7 colortex4 gaux1 8 colortex5 gaux2 9 colortex6 gaux3 10 colortex7 gaux4 11 depthtex1 12 depthtex2 13 shadowcolor0 shadowcolor 14 shadowcolor1 15 noisetex 16 colortex8 17 colortex9 18 colortex10 19 colortex11 20 colortex12 21 colortex13 22 colortex14 23 colortex15 Depth buffers usage =================== Name Usage ============================================================================== depthtex0 everything depthtex1 no translucent objects (water, stained glass) depthtex2 no translucent objects (water, stained glass), no handheld objects Shadow buffers usage ==================== Name Usage ============================================================================== shadowtex0 everything shadowtex1 no translucent objects (water, stained glass) Vertex Shader Configuration =========================== Source Effect Comment ===================================================================================================================================================================== in vec3 mc_Entity; useEntityAttrib = true in vec2 mc_midTexCoord; useMidTexCoordAttrib = true in vec4 at_tangent; useTangentAttrib = true const int countInstances = 1; when "countInstances > 1" the geometry will be rendered several times, see uniform "instanceId" Geometry Shader Configuration =========================== Source Effect Comment ===================================================================================================================================================================== #extension GL_ARB_geometry_shader4 : enable Enable GL_ARB_geometry_shader4 const int maxVerticesOut = 3; Set GEOMETRY_VERTICES_OUT_ARB for GL_ARB_geometry_shader4 Fragment Shader Configuration ============================= Source Effect Comment ===================================================================================================================================================================== uniform shadow; shadowDepthBuffers = 1 uniform watershadow; shadowDepthBuffers = 2 uniform shadowtex0; shadowDepthBuffers = 1 uniform shadowtex1; shadowDepthBuffers = 2 uniform shadowcolor; shadowColorBuffers = 1 uniform shadowcolor0; shadowColorBuffers = 1 uniform shadowcolor1; shadowColorBuffers = 2 uniform depthtex0; depthBuffers = 1 uniform depthtex1; depthBuffers = 2 uniform depthtex2; depthBuffers = 3 uniform gdepth; if (bufferFormat[1] == RGBA) bufferFormat[1] = RGBA32F; uniform gaux1; colorBuffers = 5 uniform gaux2; colorBuffers = 6 uniform gaux3; colorBuffers = 7 uniform gaux4; colorBuffers = 8 uniform colortex4; colorBuffers = 5 uniform colortex5; colorBuffers = 6 uniform colortex6; colorBuffers = 7 uniform colortex7; colorBuffers = 8 uniform centerDepthSmooth; centerDepthSmooth = true /* SHADOWRES:1024 */ shadowMapWidth = shadowMapHeight = 1024 const int shadowMapResolution = 1024; shadowMapWidth = shadowMapHeight = 1024 /* SHADOWFOV:90.0 */ shadowMapFov = 90 const float shadowMapFov = 90.0; shadowMapFov = 90 /* SHADOWHPL:160.0 */ shadowMapDistance = 160.0 const float shadowDistance = 160.0f; shadowMapDistance = 160.0 const float shadowDistanceRenderMul = -1f; shadowDistanceRenderMul = -1 When > 0 enable shadow optimization (shadowRenderDistance = shadowDistance * shadowDistanceRenderMul) const float shadowIntervalSize = 2.0f; shadowIntervalSize = 2.0 const bool generateShadowMipmap = true; shadowMipmap = true const bool generateShadowColorMipmap = true; shadowColorMipmap = true const bool shadowHardwareFiltering = true; shadowHardwareFiltering = true const bool shadowHardwareFiltering0 = true; shadowHardwareFiltering[0] = true const bool shadowHardwareFiltering1 = true; shadowHardwareFiltering[1] = true const bool shadowtexMipmap = true; shadowMipmap[0] = true const bool shadowtex0Mipmap = true; shadowMipmap[0] = true const bool shadowtex1Mipmap = true; shadowMipmap[1] = true const bool shadowcolor0Mipmap = true; shadowColorMipmap[0] = true const bool shadowColor0Mipmap = true; shadowColorMipmap[0] = true const bool shadowcolor1Mipmap = true; shadowColorMipmap[1] = true const bool shadowColor1Mipmap = true; shadowColorMipmap[1] = true const bool shadowtexNearest = true; shadowFilterNearest[0] = true const bool shadowtex0Nearest = true; shadowFilterNearest[0] = true const bool shadow0MinMagNearest = true; shadowFilterNearest[0] = true const bool shadowtex1Nearest = true; shadowFilterNearest[1] = true const bool shadow1MinMagNearest = true; shadowFilterNearest[1] = true const bool shadowcolor0Nearest = true; shadowColorFilterNearest[0] = true const bool shadowColor0Nearest = true; shadowColorFilterNearest[0] = true const bool shadowColor0MinMagNearest = true; shadowColorFilterNearest[0] = true const bool shadowcolor1Nearest = true; shadowColorFilterNearest[1] = true const bool shadowColor1Nearest = true; shadowColorFilterNearest[1] = true const bool shadowColor1MinMagNearest = true; shadowColorFilterNearest[1] = true /* WETNESSHL:600.0 */ wetnessHalfLife = 600 (ticks) const float wetnessHalflife = 600.0f; wetnessHalfLife = 600 (ticks) /* DRYNESSHL:200.0 */ drynessHalfLife = 200 (ticks) const float drynessHalflife = 200.0f; drynessHalfLife = 200 (ticks) const float eyeBrightnessHalflife = 10.0f; eyeBrightnessHalflife = 10 (ticks) const float centerDepthHalflife = 1.0f; centerDepthSmoothHalflife = 1 (ticks) const float sunPathRotation = 0f; sunPathRotation = 0f const float ambientOcclusionLevel = 1.0f; ambientOcclusionLevel = 1.0f 0.0f = AO disabled, 1.0f = vanilla AO const int superSamplingLevel = 1; superSamplingLevel = 1 const int noiseTextureResolution = 256; noiseTextureResolution = 256 /* GAUX4FORMAT:RGBA32F */ buffersFormat[7] = GL_RGBA32F /* GAUX4FORMAT:RGB32F */ buffersFormat[7] = GL_RGB32F /* GAUX4FORMAT:RGB16 */ buffersFormat[7] = GL_RGB16 const int Format = ; bufferFormats[index] = See "Draw Buffer Index" and "Texture Formats" const bool Clear = false; gbuffersClear[index] = false Skip glClear() for the given buffer, only for "composite" and "deferred" programs const vec4 ClearColor = vec4(); gbuffersClearColor[index] = vec4(r, g, b, a) Clear color for the given buffer, only for "composite" and "deferred" programs const bool MipmapEnabled = true; bufferMipmaps[index] = true Only for programs "composite" , "deferred" and "final" const int Format = ; shadowBufferFormats[index] = See "Shadow Buffer Index" and "Texture Formats" const bool Clear = false; shadowBuffersClear[index] = false Skip glClear() for the given shadow color buffer const vec4 ClearColor = vec4(); shadowBuffersClearColor[index] = vec4(r, g, b, a) Clear color for the given shadow color buffer /* DRAWBUFFERS:0257 */ drawBuffers = {0, 2, 5, 7) Only buffers 0 to 9 can be used. /* RENDERTARGETS: 0,2,11,15 */ drawBuffers = {0, 2, 11, 15} Buffers 0 to 15 can be used Draw Buffer Index ================= Prefix Index ================================== colortex<0-15> 0-15 gcolor 0 gdepth 1 gnormal 2 composite 3 gaux1 4 gaux2 5 gaux3 6 gaux4 7 Shadow Buffer Index =================== Prefix Index ================================== shadowcolor 0 shadowcolor<0-1> 0-1 Texture Formats =============== 1. 8-bit Normalized Signed normalized Integer Unsigned integer ================= ================= ================= ================= R8 R8_SNORM R8I R8I RG8 RG8_SNORM RG8I RG8I RGB8 RGB8_SNORM RGB8I RGB8I RGBA8 RGBA8_SNORM RGBA8I RGBA8I 2. 16-bit Normalized Signed normalized Float Integer Unsigned integer ================= ================= ================= ================= ================= R16 R16_SNORM R16F R16I R16UI RG16 RG16_SNORM RG16F RG16I RG16UI RGB16 RGB16_SNORM RGB16F RGB16I RGB16UI RGBA16 RGBA16_SNORM RGBA16F RGBA16I RGBA16UI 3. 32-bit Float Integer Unsigned integer ================= ================= ================= R32F R32I R32UI RG32F RG32I RG32UI RGB32F RGB32I RGB32UI RGBA32F RGBA32I RGBA32UI 4. Mixed R3_G3_B2 RGB5_A1 RGB10_A2 R11F_G11F_B10F RGB9_E5 Pixel Formats ============= 1. Normalized RED RG RGB BGR RGBA BGRA 2. Integer RED_INTEGER RG_INTEGER RGB_INTEGER BGR_INTEGER RGBA_INTEGER BGRA_INTEGER Pixel Types =========== BYTE SHORT INT HALF_FLOAT FLOAT UNSIGNED_BYTE UNSIGNED_BYTE_3_3_2 UNSIGNED_BYTE_2_3_3_REV UNSIGNED_SHORT UNSIGNED_SHORT_5_6_5 UNSIGNED_SHORT_5_6_5_REV UNSIGNED_SHORT_4_4_4_4 UNSIGNED_SHORT_4_4_4_4_REV UNSIGNED_SHORT_5_5_5_1 UNSIGNED_SHORT_1_5_5_5_REV UNSIGNED_INT UNSIGNED_INT_8_8_8_8 UNSIGNED_INT_8_8_8_8_REV UNSIGNED_INT_10_10_10_2 UNSIGNED_INT_2_10_10_10_REV Block ID mapping ================ The block ID mapping is defined in "shaders/block.properties" included in the shader pack. Forge mods may add custom block mapping as "assets//shaders/block.properties" in the mod JAR file. The "block.properties" file can use conditional preprocessor directives (#ifdef, #if, etc.) For more details see section "Standard Macros" A to I. Option macros are also available. Format "block.= ..." The key is the substitute block ID, the values are the blocks which are to be replaced. Only one line per block ID is allowed. See "properties_files.txt" for the block matching rules. # Short format block.31=red_flower yellow_flower reeds # Long format block.32=minecraft:red_flower ic2:nether_flower botania:reeds # Properties block.33=minecraft:red_flower:type=white_tulip minecraft:red_flower:type=pink_tulip botania:reeds:type=green See "properties.files" for more details. Block render layers =================== The custom block render layers are defined in "shaders/block.properties" included in the shader pack. layer.solid= layer.cutout= layer.cutout_mipped= layer.translucent= Layers solid - no alpha, no blending (solid textures) cutout - alpha, no blending (cutout textures) cutout_mipped - alpha, no blending, mipmaps (cutout with mipmaps) translucent - alpha, blending, mipmaps (water, stained glass) Blocks which are solid opaque cubes (stone, dirt, ores, etc) can't be rendered on a custom layer as this would affect face culling, ambient occlusion, light propagation and so on. For exaple: layer.translucent=glass_pane fence wooden_door Item ID mapping ================ The item ID mapping is defined in "shaders/item.properties" included in the shader pack. Forge mods may add custom item mapping as "assets//shaders/item.properties" in the mod JAR file. The "item.properties" file can use conditional preprocessor directives (#ifdef, #if, etc.) For more details see section "Standard Macros" A to I. Option macros are also available. Format "item.= ..." The key is the substitute item ID, the values are the items which are to be replaced. Only one line per item ID is allowed. # Short format item.5000=diamond_sword dirt # Long format item.5001=minecraft:diamond_sword botania:reeds Entity ID mapping ================= The entity ID mapping is defined in "shaders/entity.properties" included in the shader pack. Forge mods may add custom entity mapping as "assets//shaders/entity.properties" in the mod JAR file. The "entity.properties" file can use conditional preprocessor directives (#ifdef, #if, etc.) For more details see section "Standard Macros" A to I. Option macros are also available. Format "entity.= ..." The key is the substitute entity ID, the values are the entities which are to be replaced. Only one line per entity ID is allowed. # Short format entity.2000=sheep cow # Long format entity.2001=minecraft:pig botania:pixie Standard Macros =============== The standard macros are automatically included after the "#version" declaration in every shader file A. Minecraft version #define MC_VERSION The value is in format 122 (major 1, minor 2, release 2) For example: 1.9.4 -> 10904, 1.11.2 -> 11102, etc. B. Maximum supported GL version #define MC_GL_VERSION The value is integer, for example: 210, 320, 450 C. Maximum supported GLSL version #define MC_GLSL_VERSION The value is integer, for example: 120, 150, 450 D. Operating system One of the following: #define MC_OS_WINDOWS #define MC_OS_MAC #define MC_OS_LINUX #define MC_OS_OTHER E. Driver One of the following: #define MC_GL_VENDOR_AMD #define MC_GL_VENDOR_ATI #define MC_GL_VENDOR_INTEL #define MC_GL_VENDOR_MESA #define MC_GL_VENDOR_NVIDIA #define MC_GL_VENDOR_XORG #define MC_GL_VENDOR_OTHER F. GPU One of the following: #define MC_GL_RENDERER_RADEON #define MC_GL_RENDERER_GEFORCE #define MC_GL_RENDERER_QUADRO #define MC_GL_RENDERER_INTEL #define MC_GL_RENDERER_GALLIUM #define MC_GL_RENDERER_MESA #define MC_GL_RENDERER_OTHER G. OpenGL extensions Macros for the supported OpenGL extensions are named like the corresponding extension with a prefix "MC_". For example the macro "MC_GL_ARB_shader_texture_lod" is defined when the extension "GL_ARB_shader_texture_lod" is supported. Only the macros which are referenced and supported are added to the shader file. H. Options #define MC_FXAA_LEVEL // When FXAA is enabled, values: 2, 4 #define MC_NORMAL_MAP // When the normal map is enabled #define MC_SPECULAR_MAP // When the specular map is enabled #define MC_RENDER_QUALITY // Values: 0.5, 0.70710677, 1.0, 1.4142135, 2.0 #define MC_SHADOW_QUALITY // Values: 0.5, 0.70710677, 1.0, 1.4142135, 2.0 #define MC_HAND_DEPTH // Values: 0.0625, 0.125, 0.25 #define MC_OLD_HAND_LIGHT // When Old Hand Light is enabled #define MC_OLD_LIGHTING // When Old Lighting is enabled #define MC_ANISOTROPIC_FILTERING // When anisotropic filtering is enabled I. Textures #define MC_TEXTURE_FORMAT_LAB_PBR // Texture format LabPBR (https://github.com/rre36/lab-pbr/wiki) #define MC_TEXTURE_FORMAT_LAB_PBR_1_3 // Version 1.3 (see "texture.properties") J. Render stages // Constants for the uniform "renderStage" // The constants are given in the order in which the stages are executed #define MC_RENDER_STAGE_NONE // Undefined #define MC_RENDER_STAGE_SKY // Sky #define MC_RENDER_STAGE_SUNSET // Sunset and sunrise overlay #define MC_RENDER_STAGE_CUSTOM_SKY // Custom sky #define MC_RENDER_STAGE_SUN // Sun #define MC_RENDER_STAGE_MOON // Moon #define MC_RENDER_STAGE_STARS // Stars #define MC_RENDER_STAGE_VOID // Void #define MC_RENDER_STAGE_TERRAIN_SOLID // Terrain solid #define MC_RENDER_STAGE_TERRAIN_CUTOUT_MIPPED // Terrain cutout mipped #define MC_RENDER_STAGE_TERRAIN_CUTOUT // Terrain cutout #define MC_RENDER_STAGE_ENTITIES // Entities #define MC_RENDER_STAGE_BLOCK_ENTITIES // Block entities #define MC_RENDER_STAGE_DESTROY // Destroy overlay #define MC_RENDER_STAGE_OUTLINE // Selection outline #define MC_RENDER_STAGE_DEBUG // Debug renderers #define MC_RENDER_STAGE_HAND_SOLID // Solid handheld objects #define MC_RENDER_STAGE_TERRAIN_TRANSLUCENT // Terrain translucent #define MC_RENDER_STAGE_TRIPWIRE // Tripwire string #define MC_RENDER_STAGE_PARTICLES // Particles #define MC_RENDER_STAGE_CLOUDS // Clouds #define MC_RENDER_STAGE_RAIN_SNOW // Rain and snow #define MC_RENDER_STAGE_WORLD_BORDER // World border #define MC_RENDER_STAGE_HAND_TRANSLUCENT // Translucent handheld objects References ========== http://daxnitro.wikia.com/wiki/Editing_Shaders_%28Shaders2%29 http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1286604-shaders-mod-updated-by-karyonix http://www.minecraftforum.net/forums/search?by-author=karyonix&display-type=posts http://www.seas.upenn.edu/~cis565/fbo.htm#feedback