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Optimize vertex shader using mat3x4 to reduce bandwidth, load/store operations and ALUs

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clayjohn
2025-06-23 23:06:11 -07:00
parent 9283328fe7
commit 14b60f2264
11 changed files with 211 additions and 138 deletions
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94
servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile.glsl
View File

@@ -251,7 +251,11 @@ void vertex_shader(in vec3 vertex,
in vec3 tangent_highp,
in vec3 binormal_highp,
#endif
in uint instance_index, in uint multimesh_offset, in mat4 model_matrix,
in uint instance_index, in uint multimesh_offset, in mat3x4 in_model_matrix,
#ifdef USE_DOUBLE_PRECISION
in vec3 model_precision,
in vec3 view_precision,
#endif
#ifdef MODE_DUAL_PARABOLOID
in float dual_paraboloid_side,
in float z_far,
@@ -264,8 +268,8 @@ void vertex_shader(in vec3 vertex,
#ifdef USE_MULTIVIEW
in vec4 scene_eye_offset,
#endif
in mat4 view_matrix,
in mat4 inv_view_matrix,
in mat3x4 in_view_matrix,
in mat3x4 in_inv_view_matrix,
in vec2 viewport_size,
in uint scene_directional_light_count,
out vec4 screen_position_output) {
@@ -274,16 +278,15 @@ void vertex_shader(in vec3 vertex,
vec4 color_highp = color_attrib;
#endif
#ifdef USE_DOUBLE_PRECISION
vec3 model_precision = vec3(model_matrix[0][3], model_matrix[1][3], model_matrix[2][3]);
model_matrix[0][3] = 0.0;
model_matrix[1][3] = 0.0;
model_matrix[2][3] = 0.0;
vec3 view_precision = vec3(inv_view_matrix[0][3], inv_view_matrix[1][3], inv_view_matrix[2][3]);
inv_view_matrix[0][3] = 0.0;
inv_view_matrix[1][3] = 0.0;
inv_view_matrix[2][3] = 0.0;
#endif
mat4 inv_view_matrix = transpose(mat4(in_inv_view_matrix[0],
in_inv_view_matrix[1],
in_inv_view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
mat4 model_matrix = transpose(mat4(in_model_matrix[0],
in_model_matrix[1],
in_model_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
mat3 model_normal_matrix;
if (bool(instances.data[instance_index].flags & INSTANCE_FLAGS_NON_UNIFORM_SCALE)) {
@@ -432,8 +435,13 @@ void vertex_shader(in vec3 vertex,
float roughness_highp = 1.0;
mat4 read_view_matrix = transpose(mat4(in_view_matrix[0],
in_view_matrix[1],
in_view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
#ifdef USE_DOUBLE_PRECISION
mat4 modelview = view_matrix * model_matrix;
mat4 modelview = read_view_matrix * model_matrix;
// We separate the basis from the origin because the basis is fine with single point precision.
// Then we combine the translations from the model matrix and the view matrix using emulated doubles.
@@ -449,13 +457,12 @@ void vertex_shader(in vec3 vertex,
// Overwrite the translation part of modelview with improved precision.
vec3 temp_precision; // Will be ignored.
modelview[3].xyz = double_add_vec3(model_origin, model_precision, inv_view_matrix[3].xyz, view_precision, temp_precision);
modelview[3].xyz = mat3(view_matrix) * modelview[3].xyz;
modelview[3].xyz = mat3(read_view_matrix) * modelview[3].xyz;
#else
mat4 modelview = view_matrix * model_matrix;
mat4 modelview = read_view_matrix * model_matrix;
#endif
mat3 modelview_normal = mat3(view_matrix) * model_normal_matrix;
mat4 read_view_matrix = view_matrix;
vec2 read_viewport_size = viewport_size;
mat3 modelview_normal = mat3(read_view_matrix) * model_normal_matrix;
vec2 read_viewport_size = scene_data.viewport_size;
{
#CODE : VERTEX
@@ -486,14 +493,14 @@ void vertex_shader(in vec3 vertex,
//using world coordinates
#if !defined(SKIP_TRANSFORM_USED) && defined(VERTEX_WORLD_COORDS_USED)
vertex = (view_matrix * vec4(vertex, 1.0)).xyz;
vertex = (read_view_matrix * vec4(vertex, 1.0)).xyz;
#ifdef NORMAL_USED
normal_highp = (view_matrix * vec4(normal_highp, 0.0)).xyz;
normal_highp = (read_view_matrix * vec4(normal_highp, 0.0)).xyz;
#endif
#if defined(TANGENT_USED) || defined(NORMAL_MAP_USED) || defined(BENT_NORMAL_MAP_USED) || defined(LIGHT_ANISOTROPY_USED)
binormal_highp = (view_matrix * vec4(binormal_highp, 0.0)).xyz;
tangent_highp = (view_matrix * vec4(tangent_highp, 0.0)).xyz;
binormal_highp = (read_view_matrix * vec4(binormal_highp, 0.0)).xyz;
tangent_highp = (read_view_matrix * vec4(tangent_highp, 0.0)).xyz;
#endif
#endif
@@ -694,6 +701,11 @@ void main() {
prev_binormal,
#endif
draw_call.instance_index, draw_call.multimesh_motion_vectors_previous_offset, instances.data[draw_call.instance_index].prev_transform,
#ifdef USE_DOUBLE_PRECISION
instances.data[draw_call.instance_index].prev_model_precision.xyz,
scene_data_block.prev_data.inv_view_precision,
#endif
#ifdef MODE_DUAL_PARABOLOID
scene_data_block.prev_data.dual_paraboloid_side,
scene_data_block.prev_data.z_far,
@@ -751,6 +763,10 @@ void main() {
binormal,
#endif
draw_call.instance_index, draw_call.multimesh_motion_vectors_current_offset, instances.data[draw_call.instance_index].transform,
#ifdef USE_DOUBLE_PRECISION
instances.data[draw_call.instance_index].model_precision.xyz,
scene_data_block.data.inv_view_precision,
#endif
#ifdef MODE_DUAL_PARABOLOID
scene_data_block.data.dual_paraboloid_side,
scene_data_block.data.z_far,
@@ -1034,7 +1050,12 @@ hvec4 fog_process(vec3 vertex) {
}
if (sc_use_fog_height_density()) {
float y = (scene_data_block.data.inv_view_matrix * vec4(vertex, 1.0)).y;
mat4 inv_view_matrix = transpose(mat4(scene_data_block.data.inv_view_matrix[0],
scene_data_block.data.inv_view_matrix[1],
scene_data_block.data.inv_view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
float y = (inv_view_matrix * vec4(vertex, 1.0)).y;
float y_dist = y - scene_data_block.data.fog_height;
@@ -1164,16 +1185,14 @@ void main() {
vec2 alpha_texture_coordinate = vec2(0.0, 0.0);
#endif // ALPHA_ANTIALIASING_EDGE_USED
mat4 inv_view_matrix = scene_data.inv_view_matrix;
mat4 read_model_matrix = instances.data[draw_call.instance_index].transform;
#ifdef USE_DOUBLE_PRECISION
read_model_matrix[0][3] = 0.0;
read_model_matrix[1][3] = 0.0;
read_model_matrix[2][3] = 0.0;
inv_view_matrix[0][3] = 0.0;
inv_view_matrix[1][3] = 0.0;
inv_view_matrix[2][3] = 0.0;
#endif
mat4 inv_view_matrix = transpose(mat4(scene_data.inv_view_matrix[0],
scene_data.inv_view_matrix[1],
scene_data.inv_view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
mat4 read_model_matrix = transpose(mat4(instances.data[draw_call.instance_index].transform[0],
instances.data[draw_call.instance_index].transform[1],
instances.data[draw_call.instance_index].transform[2],
vec4(0.0, 0.0, 0.0, 1.0)));
#ifdef LIGHT_VERTEX_USED
vec3 light_vertex = vertex;
@@ -1186,7 +1205,10 @@ void main() {
model_normal_matrix = mat3(read_model_matrix);
}
mat4 read_view_matrix = scene_data.view_matrix;
mat4 read_view_matrix = transpose(mat4(scene_data.view_matrix[0],
scene_data.view_matrix[1],
scene_data.view_matrix[2],
vec4(0.0, 0.0, 0.0, 1.0)));
vec2 read_viewport_size = scene_data.viewport_size;
{
@@ -1617,7 +1639,7 @@ void main() {
uint index = instances.data[draw_call.instance_index].gi_offset;
// The world normal.
hvec3 wnormal = hmat3(scene_data.inv_view_matrix) * indirect_normal;
hvec3 wnormal = hmat3(inv_view_matrix) * indirect_normal;
// The SH coefficients used for evaluating diffuse data from SH probes.
const half c[5] = half[](

33
servers/rendering/renderer_rd/shaders/forward_mobile/scene_forward_mobile_inc.glsl
View File

@@ -303,22 +303,25 @@ layout(set = 1, binding = 0, std140) uniform SceneDataBlock {
scene_data_block;
struct InstanceData {
highp mat4 transform; // 64 - 64
highp mat4 prev_transform;
uint flags; // 04 - 68
uint instance_uniforms_ofs; // Base offset in global buffer for instance variables. // 04 - 72
uint gi_offset; // GI information when using lightmapping (VCT or lightmap index). // 04 - 76
uint layer_mask; // 04 - 80
vec4 lightmap_uv_scale; // 16 - 96 Doubles as uv_offset when needed.
highp mat3x4 transform;
vec4 compressed_aabb_position_pad; // Only .xyz is used. .w is padding.
vec4 compressed_aabb_size_pad; // Only .xyz is used. .w is padding.
vec4 uv_scale;
uint flags;
uint instance_uniforms_ofs; // Base offset in global buffer for instance variables.
uint gi_offset; // GI information when using lightmapping (VCT or lightmap index).
uint layer_mask;
highp mat3x4 prev_transform;
uvec2 reflection_probes; // 08 - 104
uvec2 omni_lights; // 08 - 112
uvec2 spot_lights; // 08 - 120
uvec2 decals; // 08 - 128
vec4 compressed_aabb_position_pad; // 16 - 144 // Only .xyz is used. .w is padding.
vec4 compressed_aabb_size_pad; // 16 - 160 // Only .xyz is used. .w is padding.
vec4 uv_scale; // 16 - 176
vec4 lightmap_uv_scale; // Doubles as uv_offset when needed.
uvec2 reflection_probes;
uvec2 omni_lights;
uvec2 spot_lights;
uvec2 decals;
#ifdef USE_DOUBLE_PRECISION
vec4 model_precision;
vec4 prev_model_precision;
#endif
};
layout(set = 1, binding = 1, std430) buffer restrict readonly InstanceDataBuffer {