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Add a Viewport property to use full floating-point precision in HDR

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This is only available on the GLES3 backend.

This can be useful for advanced shaders, but it should generally
not be enabled otherwise as full precision has a performance cost.
For general-purpose rendering, the built-in debanding filter should
be used to reduce banding instead.
This commit is contained in:
Hugo Locurcio
2021-08-16 03:16:01 +02:00
parent 66497e2ecb
commit 5335a0368c
13 changed files with 76 additions and 12 deletions
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23
drivers/gles3/rasterizer_storage_gles3.cpp
View File

@ -6873,8 +6873,7 @@ void RasterizerStorageGLES3::_render_target_allocate(RenderTarget *rt) {
GLuint color_type;
Image::Format image_format;
bool hdr = rt->flags[RENDER_TARGET_HDR] && config.framebuffer_half_float_supported;
//hdr = false;
const bool hdr = rt->flags[RENDER_TARGET_HDR] && config.framebuffer_half_float_supported;
if (!hdr || rt->flags[RENDER_TARGET_NO_3D]) {
if (rt->flags[RENDER_TARGET_NO_3D_EFFECTS] && !rt->flags[RENDER_TARGET_TRANSPARENT]) {
@ -6891,10 +6890,21 @@ void RasterizerStorageGLES3::_render_target_allocate(RenderTarget *rt) {
image_format = Image::FORMAT_RGBA8;
}
} else {
color_internal_format = GL_RGBA16F;
color_format = GL_RGBA;
color_type = GL_HALF_FLOAT;
image_format = Image::FORMAT_RGBAH;
// HDR enabled.
if (rt->flags[RENDER_TARGET_USE_32_BPC_DEPTH]) {
// 32 bpc. Can be useful for advanced shaders, but should not be used
// for general-purpose rendering as it's slower.
color_internal_format = GL_RGBA32F;
color_format = GL_RGBA;
color_type = GL_FLOAT;
image_format = Image::FORMAT_RGBAF;
} else {
// 16 bpc. This is the default HDR mode.
color_internal_format = GL_RGBA16F;
color_format = GL_RGBA;
color_type = GL_HALF_FLOAT;
image_format = Image::FORMAT_RGBAH;
}
}
{
@ -7436,6 +7446,7 @@ void RasterizerStorageGLES3::render_target_set_flag(RID p_render_target, RenderT
switch (p_flag) {
case RENDER_TARGET_HDR:
case RENDER_TARGET_USE_32_BPC_DEPTH:
case RENDER_TARGET_NO_3D:
case RENDER_TARGET_NO_SAMPLING:
case RENDER_TARGET_NO_3D_EFFECTS: {