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Route paint texture unit binding through GL backend

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This commit is contained in:
omigamedev
2026-06-04 22:08:46 +02:00
parent 4c61a490ce
commit abe3a86cc5
9 changed files with 169 additions and 32 deletions
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78
src/node_stroke_preview.cpp
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@@ -40,6 +40,38 @@ pp::paint_renderer::CanvasStrokeFeedbackPlan stroke_preview_destination_feedback
return fallback;
}
void activate_opengl_texture(std::uint32_t texture_unit) noexcept
{
glActiveTexture(static_cast<GLenum>(texture_unit));
}
void bind_opengl_texture(std::uint32_t target, std::uint32_t texture) noexcept
{
glBindTexture(static_cast<GLenum>(target), static_cast<GLuint>(texture));
}
void set_active_texture_unit(std::uint32_t unit_index)
{
const auto status = pp::renderer::gl::activate_opengl_texture_unit(
unit_index,
pp::renderer::gl::OpenGlActiveTextureDispatch {
.active_texture = activate_opengl_texture,
});
if (!status.ok())
LOG("NodeStrokePreview active texture dispatch failed because: %s", status.message);
}
void unbind_texture_2d()
{
const auto status = pp::renderer::gl::bind_opengl_texture_2d(
0U,
pp::renderer::gl::OpenGlTexture2DBindDispatch {
.bind_texture = bind_opengl_texture,
});
if (!status.ok())
LOG("NodeStrokePreview texture unbind dispatch failed because: %s", status.message);
}
}
std::atomic_int NodeStrokePreview::s_instances{ 0 };
@@ -165,16 +197,16 @@ void NodeStrokePreview::stroke_draw_mix(const glm::vec2& bb_min, const glm::vec2
ShaderManager::u_float(kShaderUniform::DualAlpha, b->m_dual_opacity);
m_sampler_linear.bind(0);
glActiveTexture(pp::renderer::gl::active_texture_unit(0U));
set_active_texture_unit(0U);
m_tex_background.bind();
glActiveTexture(pp::renderer::gl::active_texture_unit(1U));
set_active_texture_unit(1U);
m_rtt.bindTexture();
glActiveTexture(pp::renderer::gl::active_texture_unit(3U));
set_active_texture_unit(3U);
m_tex_dual.bind();
glActiveTexture(pp::renderer::gl::active_texture_unit(4U));
set_active_texture_unit(4U);
b->m_pattern_texture ?
b->m_pattern_texture->bind() :
glBindTexture(pp::renderer::gl::texture_2d_target(), 0);
unbind_texture_2d();
m_plane.draw_fill();
m_rtt_mixer.unbindFramebuffer();
@@ -188,7 +220,7 @@ glm::vec4 NodeStrokePreview::stroke_draw_samples(
{
if (copy_stroke_destination)
{
glActiveTexture(pp::renderer::gl::active_texture_unit(1U));
set_active_texture_unit(1U);
blend_tex.bind(); // bg, copy of framebuffer (copied before drawing)
}
@@ -227,7 +259,7 @@ glm::vec4 NodeStrokePreview::stroke_draw_samples(
if (copy_stroke_destination)
{
glActiveTexture(pp::renderer::gl::active_texture_unit(1U));
set_active_texture_unit(1U);
blend_tex.unbind();
}
@@ -416,10 +448,10 @@ void NodeStrokePreview::draw_stroke_immediate()
ShaderManager::u_float(kShaderUniform::MixAlpha, 0);
ShaderManager::u_float(kShaderUniform::Wet, 0);
ShaderManager::u_float(kShaderUniform::Noise, 0);
glActiveTexture(pp::renderer::gl::active_texture_unit(0U));
set_active_texture_unit(0U);
dual_brush->m_tip_texture ?
dual_brush->m_tip_texture->bind() :
glBindTexture(pp::renderer::gl::texture_2d_target(), 0);
unbind_texture_2d();
auto frames_dual = stroke_draw_compute(m_dual_stroke, zoom);
for (auto& f : frames_dual)
{
@@ -430,7 +462,7 @@ void NodeStrokePreview::draw_stroke_immediate()
}
// copy raw stroke to tex
glActiveTexture(pp::renderer::gl::active_texture_unit(1U));
set_active_texture_unit(1U);
m_tex_dual.bind();
copy_framebuffer_to_texture_2d(
0,
@@ -467,19 +499,19 @@ void NodeStrokePreview::draw_stroke_immediate()
ShaderManager::u_float(kShaderUniform::Wet, b->m_tip_wet);
ShaderManager::u_float(kShaderUniform::Noise, b->m_tip_noise);
glActiveTexture(pp::renderer::gl::active_texture_unit(0U));
set_active_texture_unit(0U);
b->m_tip_texture->bind();
if (copy_stroke_destination)
{
glActiveTexture(pp::renderer::gl::active_texture_unit(1U));
set_active_texture_unit(1U);
m_tex.bind(); // tmp swap for blending
}
glActiveTexture(pp::renderer::gl::active_texture_unit(2U));
set_active_texture_unit(2U);
b->m_pattern_texture ?
b->m_pattern_texture->bind() :
glBindTexture(pp::renderer::gl::texture_2d_target(), 0);
glActiveTexture(pp::renderer::gl::active_texture_unit(3U));
b->m_tip_mix > 0.f ? m_rtt_mixer.bindTexture() : glBindTexture(pp::renderer::gl::texture_2d_target(), 0);
unbind_texture_2d();
set_active_texture_unit(3U);
b->m_tip_mix > 0.f ? m_rtt_mixer.bindTexture() : unbind_texture_2d();
auto frames = stroke_draw_compute(m_stroke, zoom);
m_rtt.clear();
for (auto& f : frames)
@@ -498,11 +530,11 @@ void NodeStrokePreview::draw_stroke_immediate()
ShaderManager::u_float(kShaderUniform::Opacity, f.opacity);
/*auto rect =*/ stroke_draw_samples(f.shapes, m_tex, copy_stroke_destination);
}
glActiveTexture(pp::renderer::gl::active_texture_unit(3U));
set_active_texture_unit(3U);
m_rtt_mixer.unbindTexture();
// copy raw stroke to tex
glActiveTexture(pp::renderer::gl::active_texture_unit(1U));
set_active_texture_unit(1U);
m_tex.bind();
copy_framebuffer_to_texture_2d(
0,
@@ -544,16 +576,16 @@ void NodeStrokePreview::draw_stroke_immediate()
m_sampler_linear.bind(3);
m_sampler_linear_repeat.bind(4);
glActiveTexture(pp::renderer::gl::active_texture_unit(0U));
set_active_texture_unit(0U);
m_tex_background.bind();
glActiveTexture(pp::renderer::gl::active_texture_unit(1U));
set_active_texture_unit(1U);
m_tex.bind();
glActiveTexture(pp::renderer::gl::active_texture_unit(3U));
set_active_texture_unit(3U);
m_tex_dual.bind();
glActiveTexture(pp::renderer::gl::active_texture_unit(4U));
set_active_texture_unit(4U);
b->m_pattern_texture ?
b->m_pattern_texture->bind() :
glBindTexture(pp::renderer::gl::texture_2d_target(), 0);
unbind_texture_2d();
m_plane.draw_fill();
// copy the result to the actual preview