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gfx-shader: Fix rendering at unexpected sizes and fix performance

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Fixes rendering at unexpected sizes by first rendering to a render target and then rendering the contents of that render target to the frame buffer instead. This also prevent rendering twice or more, which might cause severe FPS impact.
This commit is contained in:
Michael Fabian 'Xaymar' Dirks 2020-04-23 07:56:12 +02:00 committed by Michael Fabian Dirks
parent f58ce9f421
commit 5291b193e2
2 changed files with 26 additions and 2 deletions
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23
source/gfx/shader/gfx-shader.cpp
View file

@ -39,7 +39,9 @@ gfx::shader::shader::shader(obs_source_t* self, shader_mode mode)
_width_type(size_type::Percent), _width_value(1.0), _height_type(size_type::Percent), _height_value(1.0),
_time(0), _time_loop(0), _loops(0), _random(), _have_current_params(false)
_time(0), _time_loop(0), _loops(0), _random(), _have_current_params(false),
_rt_up_to_date(false), _rt(std::make_shared<gs::rendertarget>(GS_RGBA, GS_ZS_NONE))
{
_random.seed(static_cast<unsigned long long>(time(NULL)));
}
@ -453,6 +455,8 @@ void gfx::shader::shader::prepare_render()
1.0f / static_cast<float_t>(width()), 1.0f / static_cast<float_t>(height()));
}
}
_rt_up_to_date = false;
}
void gfx::shader::shader::render()
@ -460,7 +464,22 @@ void gfx::shader::shader::render()
if (!_shader)
return;
while (gs_effect_loop(_shader.get_object(), _shader_tech.c_str())) {
if (!_rt_up_to_date) {
auto op = _rt->render(width(), height());
vec4 zero = {0, 0, 0, 0};
gs_ortho(0, width(), 0, height(), 0, 1);
gs_clear(GS_CLEAR_COLOR, &zero, 0, 0);
gs_enable_blending(true);
gs_blend_function(GS_BLEND_ONE, GS_BLEND_ZERO);
gs_enable_color(true, true, true, true);
while (gs_effect_loop(_shader.get_object(), _shader_tech.c_str())) {
gs_draw_sprite(nullptr, 0, width(), height());
}
}
gs_effect_set_texture(gs_effect_get_param_by_name(obs_get_base_effect(OBS_EFFECT_DEFAULT), "image"),
_rt->get_texture()->get_object());
while (gs_effect_loop(obs_get_base_effect(OBS_EFFECT_DEFAULT), "Draw")) {
gs_draw_sprite(nullptr, 0, width(), height());
}
}

5
source/gfx/shader/gfx-shader.hpp
View file

@ -23,6 +23,7 @@
#include <random>
#include "gfx/shader/gfx-shader-param.hpp"
#include "obs/gs/gs-effect.hpp"
#include "obs/gs/gs-rendertarget.hpp"
namespace gfx {
namespace shader {
@ -69,6 +70,10 @@ namespace gfx {
std::mt19937_64 _random;
bool _have_current_params;
// Rendering
bool _rt_up_to_date;
std::shared_ptr<gs::rendertarget> _rt;
public:
shader(obs_source_t* self, shader_mode mode);
~shader();