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path: root/drivers/gles3/rasterizer_storage_gles3.cpp
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Diffstat (limited to 'drivers/gles3/rasterizer_storage_gles3.cpp')
-rw-r--r--drivers/gles3/rasterizer_storage_gles3.cpp151
1 files changed, 134 insertions, 17 deletions
diff --git a/drivers/gles3/rasterizer_storage_gles3.cpp b/drivers/gles3/rasterizer_storage_gles3.cpp
index 625bfb4554..71a3a79eb3 100644
--- a/drivers/gles3/rasterizer_storage_gles3.cpp
+++ b/drivers/gles3/rasterizer_storage_gles3.cpp
@@ -1757,6 +1757,7 @@ RID RasterizerStorageGLES3::sky_create() {
Sky *sky = memnew(Sky);
sky->radiance = 0;
+ sky->irradiance = 0;
return sky_owner.make_rid(sky);
}
@@ -1768,7 +1769,9 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
if (sky->panorama.is_valid()) {
sky->panorama = RID();
glDeleteTextures(1, &sky->radiance);
+ glDeleteTextures(1, &sky->irradiance);
sky->radiance = 0;
+ sky->irradiance = 0;
}
sky->panorama = p_panorama;
@@ -1791,10 +1794,14 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
glActiveTexture(GL_TEXTURE0);
glBindTexture(texture->target, texture->tex_id);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); //need this for proper sampling
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 10);
+ // Need Mipmaps regardless of whether they are set in import by user
+ glGenerateMipmap(texture->target);
+ glTexParameterf(texture->target, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameterf(texture->target, GL_TEXTURE_WRAP_T, GL_REPEAT);
+ glTexParameterf(texture->target, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+ glTexParameterf(texture->target, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
if (config.srgb_decode_supported && texture->srgb && !texture->using_srgb) {
@@ -1808,6 +1815,66 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
#endif
}
+ {
+ //Irradiance map
+ glActiveTexture(GL_TEXTURE1);
+ glGenTextures(1, &sky->irradiance);
+ glBindTexture(GL_TEXTURE_2D, sky->irradiance);
+
+ GLuint tmp_fb;
+
+ glGenFramebuffers(1, &tmp_fb);
+ glBindFramebuffer(GL_FRAMEBUFFER, tmp_fb);
+
+ int size = 64;
+
+ bool use_float = config.framebuffer_half_float_supported;
+
+ GLenum internal_format = use_float ? GL_RGBA16F : GL_RGB10_A2;
+ GLenum format = GL_RGBA;
+ GLenum type = use_float ? GL_HALF_FLOAT : GL_UNSIGNED_INT_2_10_10_10_REV;
+
+ glTexImage2D(GL_TEXTURE_2D, 0, internal_format, size, size * 2, 0, format, type, NULL);
+
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
+ glTexParameterf(texture->target, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameterf(texture->target, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, sky->irradiance, 0);
+
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DUAL_PARABOLOID, true);
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_PANORAMA, true);
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::COMPUTE_IRRADIANCE, true);
+ shaders.cubemap_filter.bind();
+
+ // Very large Panoramas require way too much effort to compute irradiance so use a mipmap
+ // level that corresponds to a panorama of 1024x512
+ shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::SOURCE_MIP_LEVEL, MAX(Math::log(float(texture->width)) / Math::log(2.0f) - 10.0f, 0.0f));
+
+ for (int i = 0; i < 2; i++) {
+ glViewport(0, i * size, size, size);
+ glBindVertexArray(resources.quadie_array);
+
+ shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::Z_FLIP, i > 0);
+
+ glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
+ glBindVertexArray(0);
+ }
+
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DUAL_PARABOLOID, false);
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_PANORAMA, false);
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::COMPUTE_IRRADIANCE, false);
+
+ glBindFramebuffer(GL_FRAMEBUFFER, RasterizerStorageGLES3::system_fbo);
+ glDeleteFramebuffers(1, &tmp_fb);
+ }
+
+ // Now compute radiance
+
glActiveTexture(GL_TEXTURE1);
glGenTextures(1, &sky->radiance);
@@ -1833,8 +1900,8 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, internal_format, size, size * 2, array_level, 0, format, type, NULL);
- glTexParameterf(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameterf(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
GLuint tmp_fb2;
GLuint tmp_tex;
@@ -1846,8 +1913,8 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
glBindTexture(GL_TEXTURE_2D, tmp_tex);
glTexImage2D(GL_TEXTURE_2D, 0, internal_format, size, size * 2, 0, format, type, NULL);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tmp_tex, 0);
- glTexParameterf(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameterf(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
#ifdef DEBUG_ENABLED
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
ERR_FAIL_COND(status != GL_FRAMEBUFFER_COMPLETE);
@@ -1858,25 +1925,25 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
glBindFramebuffer(GL_FRAMEBUFFER, tmp_fb2);
- if (j == 0) {
+ if (j < 3) {
shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DUAL_PARABOLOID, true);
shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_PANORAMA, true);
- shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DIRECT_WRITE, true);
shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_DUAL_PARABOLOID_ARRAY, false);
shaders.cubemap_filter.bind();
glActiveTexture(GL_TEXTURE0);
glBindTexture(texture->target, texture->tex_id);
+ shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::SOURCE_RESOLUTION, float(texture->width / 4));
} else {
shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DUAL_PARABOLOID, true);
shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_PANORAMA, false);
shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_DUAL_PARABOLOID_ARRAY, true);
- shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DIRECT_WRITE, false);
shaders.cubemap_filter.bind();
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D_ARRAY, sky->radiance);
shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::SOURCE_ARRAY_INDEX, j - 1); //read from previous to ensure better blur
+ shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::SOURCE_RESOLUTION, float(size / 2));
}
for (int i = 0; i < 2; i++) {
@@ -1902,7 +1969,6 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_PANORAMA, false);
shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DUAL_PARABOLOID, false);
shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_DUAL_PARABOLOID_ARRAY, false);
- shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DIRECT_WRITE, false);
//restore ranges
glActiveTexture(GL_TEXTURE0);
@@ -1947,23 +2013,64 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, mipmaps - 1);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+ GLuint tmp_fb2;
+ GLuint tmp_tex;
+ {
+ // Need a temporary framebuffer for rendering so we can read from previous iterations
+ glGenFramebuffers(1, &tmp_fb2);
+ glBindFramebuffer(GL_FRAMEBUFFER, tmp_fb2);
+ glGenTextures(1, &tmp_tex);
+ glBindTexture(GL_TEXTURE_2D, tmp_tex);
+ glTexImage2D(GL_TEXTURE_2D, 0, internal_format, size, size * 2, 0, format, type, NULL);
+ glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tmp_tex, 0);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+#ifdef DEBUG_ENABLED
+ GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
+ ERR_FAIL_COND(status != GL_FRAMEBUFFER_COMPLETE);
+#endif
+ }
lod = 0;
mm_level = mipmaps;
size = p_radiance_size;
- shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DUAL_PARABOLOID, true);
- shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_PANORAMA, true);
- shaders.cubemap_filter.bind();
-
while (mm_level) {
-
+ glBindFramebuffer(GL_FRAMEBUFFER, tmp_fb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, sky->radiance, lod);
+
#ifdef DEBUG_ENABLED
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
ERR_CONTINUE(status != GL_FRAMEBUFFER_COMPLETE);
#endif
+ glBindTexture(GL_TEXTURE_2D, tmp_tex);
+ glTexImage2D(GL_TEXTURE_2D, 0, internal_format, size, size * 2, 0, format, type, NULL);
+ glBindFramebuffer(GL_FRAMEBUFFER, tmp_fb2);
+ glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, tmp_tex, 0);
+ if (lod < 3) {
+
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DUAL_PARABOLOID, true);
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_PANORAMA, true);
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_DUAL_PARABOLOID, false);
+ shaders.cubemap_filter.bind();
+ glActiveTexture(GL_TEXTURE0);
+ glBindTexture(texture->target, texture->tex_id);
+ shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::SOURCE_RESOLUTION, float(texture->width / 4));
+ } else {
+
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_DUAL_PARABOLOID, true);
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_PANORAMA, false);
+ shaders.cubemap_filter.set_conditional(CubemapFilterShaderGLES3::USE_SOURCE_DUAL_PARABOLOID, true);
+ shaders.cubemap_filter.bind();
+ glActiveTexture(GL_TEXTURE0);
+ glBindTexture(GL_TEXTURE_2D, sky->radiance);
+ shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::SOURCE_MIP_LEVEL, lod - 1); //read from previous to ensure better blur
+ shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::SOURCE_RESOLUTION, float(size));
+ }
for (int i = 0; i < 2; i++) {
glViewport(0, i * size, size, size);
@@ -1976,6 +2083,14 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
glBindVertexArray(0);
}
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, tmp_fb);
+ glFramebufferTextureLayer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, sky->radiance, 0, lod);
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, tmp_fb2);
+ glReadBuffer(GL_COLOR_ATTACHMENT0);
+ glBlitFramebuffer(0, 0, size, size * 2, 0, 0, size, size * 2, GL_COLOR_BUFFER_BIT, GL_NEAREST);
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+
if (size > 1)
size >>= 1;
lod++;
@@ -1995,6 +2110,8 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra
glBindFramebuffer(GL_FRAMEBUFFER, RasterizerStorageGLES3::system_fbo);
glDeleteFramebuffers(1, &tmp_fb);
+ glDeleteFramebuffers(1, &tmp_fb2);
+ glDeleteTextures(1, &tmp_tex);
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-01 05:54:12 +0000