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C++: Stabilize line by line renderer

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Fixes https://github.com/slint-ui/slint/issues/7505

ChangeLog: C++: Added `SoftwareRenderer::render_by_line`.
This commit is contained in:
Olivier Goffart 2025-02-20 08:50:14 +01:00
parent 39191e5acd
commit 290468fb55
4 changed files with 1 additions and 19 deletions
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4
api/cpp/esp-idf/slint/include/slint-esp.h
View file

@ -21,9 +21,7 @@
* allocated by the `esp_lcd` driver and set `buffer1` and `buffer2`.
* * Line-by-line rendering: Set neither `buffer1` nor `buffer2` to instruct Slint to allocate
* a buffer (with MALLOC_CAP_INTERNAL) big enough to hold one line,
* render into it, and send it to the display. This is an experimental
* feature that requires enabling the `SLINT_FEATURE_EXPERIMENTAL` CMake
* option.
* render into it, and send it to the display.
*
* Use single-buffering if you can allocate a buffer in a memory region that allows the esp_lcd
* driver to efficiently transfer to the display. Use double-buffering if your driver supports

9
api/cpp/esp-idf/slint/src/slint-esp.cpp
View file

@ -49,13 +49,6 @@ struct EspPlatform : public slint::platform::Platform
byte_swap(config.byte_swap),
rotation(config.rotation)
{
#if !defined(SLINT_FEATURE_EXPERIMENTAL)
if (!buffer1 && !buffer2) {
ESP_LOGI(TAG,
"FATAL: Line-by-line rendering requested for use with slint-esp is "
"experimental and not enabled in this build.");
}
#endif
}
std::unique_ptr<slint::platform::WindowAdapter> create_window_adapter() override;
@ -268,7 +261,6 @@ void EspPlatform<PixelType>::run_event_loop()
}
}
}
#ifdef SLINT_FEATURE_EXPERIMENTAL
} else {
std::unique_ptr<PixelType, void (*)(void *)> lb(
static_cast<PixelType *>(heap_caps_malloc(
@ -288,7 +280,6 @@ void EspPlatform<PixelType>::run_event_loop()
esp_lcd_panel_draw_bitmap(panel_handle, line_start, line_y,
line_end, line_y + 1, lb.get());
});
#endif
}
}

2
api/cpp/include/slint-platform.h
View file

@ -693,7 +693,6 @@ public:
return PhysicalRegion { r };
}
# ifdef SLINT_FEATURE_EXPERIMENTAL
/// Render the window scene, line by line. The provided Callback will be invoked for each line
/// that needs to rendered.
///
@ -740,7 +739,6 @@ public:
"Unsupported PixelType. It must be either Rgba8Pixel or Rgb565Pixel");
}
}
# endif
/// This enum describes the rotation that is applied to the buffer when rendering.
/// To be used in set_rendering_rotation()

5
api/cpp/platform.rs
View file

@ -403,7 +403,6 @@ mod software_renderer {
renderer.render(buffer, pixel_stride)
}
#[cfg(feature = "experimental")]
struct LineByLineProcessor<TargetPixel> {
process_line_fn: extern "C" fn(
*mut core::ffi::c_void,
@ -416,7 +415,6 @@ mod software_renderer {
user_data: *mut core::ffi::c_void,
}
#[cfg(feature = "experimental")]
impl<TargetPixel: i_slint_core::software_renderer::TargetPixel>
i_slint_core::software_renderer::LineBufferProvider for LineByLineProcessor<TargetPixel>
{
@ -431,7 +429,6 @@ mod software_renderer {
}
}
#[cfg(feature = "experimental")]
impl<TargetPixel> LineByLineProcessor<TargetPixel> {
fn cpp_process_line<RenderFn: FnOnce(&mut [TargetPixel])>(
&mut self,
@ -467,7 +464,6 @@ mod software_renderer {
}
}
#[cfg(feature = "experimental")]
#[no_mangle]
pub unsafe extern "C" fn slint_software_renderer_render_by_line_rgb565(
r: SoftwareRendererOpaque,
@ -486,7 +482,6 @@ mod software_renderer {
renderer.render_by_line(processor)
}
#[cfg(feature = "experimental")]
#[no_mangle]
pub unsafe extern "C" fn slint_software_renderer_render_by_line_rgb8(
r: SoftwareRendererOpaque,