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Add GLES3 infrastructure for lightmap baking in the compatibility backend

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clayjohn 2024-01-19 12:39:26 -08:00
parent 4b6ad34988
commit efb1cbaad4
11 changed files with 533 additions and 86 deletions
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52
drivers/gles3/shaders/scene.glsl
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@ -31,6 +31,7 @@ USE_ADDITIVE_LIGHTING = false
// these are false, we are doing a directional light pass.
ADDITIVE_OMNI = false
ADDITIVE_SPOT = false
RENDER_MATERIAL = false
#[vertex]
@ -90,7 +91,7 @@ layout(location = 3) in vec4 color_attrib;
layout(location = 4) in vec2 uv_attrib;
#endif
#if defined(UV2_USED) || defined(USE_LIGHTMAP)
#if defined(UV2_USED) || defined(USE_LIGHTMAP) || defined(RENDER_MATERIAL)
layout(location = 5) in vec2 uv2_attrib;
#endif
@ -160,12 +161,12 @@ layout(std140) uniform SceneData { // ubo:2
mediump vec4 ambient_light_color_energy;
mediump float ambient_color_sky_mix;
bool material_uv2_mode;
float pad2;
float emissive_exposure_normalization;
bool use_ambient_light;
bool use_ambient_cubemap;
bool use_reflection_cubemap;
float fog_aerial_perspective;
float time;
@ -249,6 +250,10 @@ uniform highp vec4 uv_scale;
uniform highp uint model_flags;
#ifdef RENDER_MATERIAL
uniform mediump vec2 uv_offset;
#endif
/* Varyings */
out highp vec3 vertex_interp;
@ -511,6 +516,12 @@ void main() {
#else
gl_Position = projection_matrix * vec4(vertex_interp, 1.0);
#endif
#ifdef RENDER_MATERIAL
gl_Position.xy = (uv2_attrib.xy + uv_offset) * 2.0 - 1.0;
gl_Position.z = 0.00001;
gl_Position.w = 1.0;
#endif
}
/* clang-format off */
@ -632,12 +643,12 @@ layout(std140) uniform SceneData { // ubo:2
mediump vec4 ambient_light_color_energy;
mediump float ambient_color_sky_mix;
bool material_uv2_mode;
float pad2;
float emissive_exposure_normalization;
bool use_ambient_light;
bool use_ambient_cubemap;
bool use_reflection_cubemap;
float fog_aerial_perspective;
float time;
@ -878,8 +889,20 @@ vec2 multiview_uv(vec2 uv) {
uniform highp mat4 world_transform;
uniform mediump float opaque_prepass_threshold;
#ifndef MODE_RENDER_DEPTH
#ifdef RENDER_MATERIAL
layout(location = 0) out vec4 albedo_output_buffer;
layout(location = 1) out vec4 normal_output_buffer;
layout(location = 2) out vec4 orm_output_buffer;
layout(location = 3) out vec4 emission_output_buffer;
#else // !RENDER_MATERIAL
// Normal color rendering.
layout(location = 0) out vec4 frag_color;
#endif // !RENDER_MATERIAL
#endif // !MODE_RENDER_DEPTH
vec3 F0(float metallic, float specular, vec3 albedo) {
float dielectric = 0.16 * specular * specular;
// use albedo * metallic as colored specular reflectance at 0 angle for metallic materials;
@ -1660,6 +1683,23 @@ void main() {
// Nothing happens, so a tree-ssa optimizer will result in no fragment shader :)
#else // !MODE_RENDER_DEPTH
#ifdef RENDER_MATERIAL
albedo_output_buffer.rgb = albedo;
albedo_output_buffer.a = alpha;
normal_output_buffer.rgb = normal * 0.5 + 0.5;
normal_output_buffer.a = 0.0;
orm_output_buffer.r = ao;
orm_output_buffer.g = roughness;
orm_output_buffer.b = metallic;
orm_output_buffer.a = 1.0;
emission_output_buffer.rgb = emission;
emission_output_buffer.a = 0.0;
#else // !RENDER_MATERIAL
#ifdef BASE_PASS
#ifdef MODE_UNSHADED
frag_color = vec4(albedo, alpha);
@ -1914,6 +1954,6 @@ void main() {
frag_color.rgb += additive_light_color;
#endif // USE_ADDITIVE_LIGHTING
#endif // !RENDER_MATERIAL
#endif //!MODE_RENDER_DEPTH
}