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Add stroke composite feedback planner

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This commit is contained in:
omigamedev
2026-06-03 18:07:08 +02:00
parent 94a6877e7c
commit 2ec11e5099
9 changed files with 531 additions and 3 deletions
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47
src/paint_renderer/compositor.h
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@@ -4,10 +4,17 @@
#include "paint/blend.h"
#include "renderer_api/renderer_api.h"
#include <cstdint>
#include <span>
namespace pp::paint_renderer {
enum class StrokeCompositePath : std::uint8_t {
fixed_function_blend,
framebuffer_fetch,
ping_pong_textures,
};
struct LayerCompositeView {
std::span<const pp::paint::Rgba> pixels;
float opacity = 1.0F;
@@ -15,9 +22,49 @@ struct LayerCompositeView {
pp::paint::BlendMode blend_mode = pp::paint::BlendMode::normal;
};
struct StrokeCompositeRequest {
pp::renderer::Extent2D extent {};
pp::renderer::TextureFormat target_format = pp::renderer::TextureFormat::rgba8;
pp::renderer::TextureUsage target_usage = pp::renderer::TextureUsage::render_target
| pp::renderer::TextureUsage::sampled
| pp::renderer::TextureUsage::copy_source
| pp::renderer::TextureUsage::copy_destination;
pp::paint::BlendMode layer_blend_mode = pp::paint::BlendMode::normal;
pp::paint::StrokeBlendMode stroke_blend_mode = pp::paint::StrokeBlendMode::normal;
bool dual_brush_blend = false;
bool pattern_blend = false;
};
struct StrokeCompositePlan {
StrokeCompositePath path = StrokeCompositePath::fixed_function_blend;
pp::renderer::PaintFeedbackPlan feedback {};
pp::renderer::TextureDesc target_desc {};
std::uint64_t target_bytes = 0;
std::uint64_t auxiliary_bytes = 0;
std::uint64_t estimated_working_bytes = 0;
bool complex_blend = false;
bool reads_destination_color = false;
bool requires_auxiliary_texture = false;
bool requires_texture_copy = false;
bool requires_render_target_blit = false;
bool requires_explicit_transition = false;
};
[[nodiscard]] pp::foundation::Status composite_layer(
std::span<pp::paint::Rgba> destination,
pp::renderer::Extent2D extent,
LayerCompositeView layer) noexcept;
[[nodiscard]] bool stroke_composite_requires_feedback(
pp::paint::BlendMode layer_blend_mode,
pp::paint::StrokeBlendMode stroke_blend_mode,
bool dual_brush_blend,
bool pattern_blend) noexcept;
[[nodiscard]] pp::foundation::Result<StrokeCompositePlan> plan_stroke_composite(
pp::renderer::RenderDeviceFeatures features,
StrokeCompositeRequest request) noexcept;
[[nodiscard]] const char* stroke_composite_path_name(StrokeCompositePath path) noexcept;
}