diff options
| -rw-r--r-- | drivers/gles3/rasterizer_storage_gles3.cpp | 43 | ||||
| -rw-r--r-- | drivers/gles3/shaders/copy.glsl | 8 | ||||
| -rw-r--r-- | drivers/gles3/shaders/cubemap_filter.glsl | 4 |
3 files changed, 51 insertions, 4 deletions
diff --git a/drivers/gles3/rasterizer_storage_gles3.cpp b/drivers/gles3/rasterizer_storage_gles3.cpp index 801763609e..26fbdfc73d 100644 --- a/drivers/gles3/rasterizer_storage_gles3.cpp +++ b/drivers/gles3/rasterizer_storage_gles3.cpp @@ -1834,7 +1834,7 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra glGenFramebuffers(1, &tmp_fb); glBindFramebuffer(GL_FRAMEBUFFER, tmp_fb); - int size = 64; + int size = 32; bool use_float = config.framebuffer_half_float_supported; @@ -1854,6 +1854,24 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, sky->irradiance, 0); + GLuint tmp_fb2; + GLuint tmp_tex; + { + //generate another one for rendering, as can't read and write from a single texarray it seems + 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, p_radiance_size, 2.0 * p_radiance_size, 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_MIPMAP_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR); +#ifdef DEBUG_ENABLED + GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER); + ERR_FAIL_COND(status != GL_FRAMEBUFFER_COMPLETE); +#endif + } + 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); @@ -1863,8 +1881,10 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra // level that corresponds to a panorama of 1024x512 shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::SOURCE_MIP_LEVEL, MAX(Math::floor(Math::log(float(texture->width)) / Math::log(2.0f)) - 10.0f, 0.0f)); + // Compute Irradiance for a large texture, specified by radiance size and then pull out a low mipmap corresponding to 32x32 + int vp_size = p_radiance_size; for (int i = 0; i < 2; i++) { - glViewport(0, i * size, size, size); + glViewport(0, i * vp_size, vp_size, vp_size); glBindVertexArray(resources.quadie_array); shaders.cubemap_filter.set_uniform(CubemapFilterShaderGLES3::Z_FLIP, i > 0); @@ -1872,13 +1892,32 @@ void RasterizerStorageGLES3::sky_set_texture(RID p_sky, RID p_panorama, int p_ra glDrawArrays(GL_TRIANGLE_FAN, 0, 4); glBindVertexArray(0); } + glGenerateMipmap(GL_TEXTURE_2D); + glActiveTexture(GL_TEXTURE0); + glBindTexture(GL_TEXTURE_2D, tmp_tex); + glBindFramebuffer(GL_FRAMEBUFFER, tmp_fb); 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); + shaders.copy.set_conditional(CopyShaderGLES3::USE_LOD, true); + shaders.copy.bind(); + shaders.copy.set_uniform(CopyShaderGLES3::MIP_LEVEL, MAX(Math::floor(Math::log(float(p_radiance_size)) / Math::log(2.0f)) - 5.0f, 0.0f)); // Mip level that corresponds to a 32x32 texture + + glViewport(0, 0, size, size * 2.0); + glBindVertexArray(resources.quadie_array); + glDrawArrays(GL_TRIANGLE_FAN, 0, 4); + glBindVertexArray(0); + + shaders.copy.set_conditional(CopyShaderGLES3::USE_LOD, false); + glBindFramebuffer(GL_FRAMEBUFFER, RasterizerStorageGLES3::system_fbo); + glActiveTexture(GL_TEXTURE0); + glBindTexture(texture->target, texture->tex_id); glDeleteFramebuffers(1, &tmp_fb); + glDeleteFramebuffers(1, &tmp_fb2); + glDeleteTextures(1, &tmp_tex); } // Now compute radiance diff --git a/drivers/gles3/shaders/copy.glsl b/drivers/gles3/shaders/copy.glsl index 1952e201aa..a3cdb3a543 100644 --- a/drivers/gles3/shaders/copy.glsl +++ b/drivers/gles3/shaders/copy.glsl @@ -104,6 +104,10 @@ uniform sampler2D CbCr; //texunit:1 /* clang-format on */ +#ifdef USE_LOD +uniform float mip_level; +#endif + #if defined(USE_TEXTURE3D) || defined(USE_TEXTURE2DARRAY) uniform float layer; #endif @@ -190,8 +194,12 @@ void main() { color.gb = textureLod(CbCr, uv_interp, 0.0).rg - vec2(0.5, 0.5); color.a = 1.0; #else +#ifdef USE_LOD + vec4 color = textureLod(source, uv_interp, mip_level); +#else vec4 color = textureLod(source, uv_interp, 0.0); #endif +#endif #ifdef LINEAR_TO_SRGB // regular Linear -> SRGB conversion diff --git a/drivers/gles3/shaders/cubemap_filter.glsl b/drivers/gles3/shaders/cubemap_filter.glsl index 3f3313c3a7..15d4e2d58e 100644 --- a/drivers/gles3/shaders/cubemap_filter.glsl +++ b/drivers/gles3/shaders/cubemap_filter.glsl @@ -183,12 +183,12 @@ vec2 Hammersley(uint i, uint N) { #ifdef LOW_QUALITY #define SAMPLE_COUNT 64u -#define SAMPLE_DELTA 0.05 +#define SAMPLE_DELTA 0.1 #else #define SAMPLE_COUNT 512u -#define SAMPLE_DELTA 0.01 +#define SAMPLE_DELTA 0.03 #endif |