tt::pipeline_SDF::device_shared Struct Reference

Public Member Functions
	device_shared (gfx_device_vulkan const &device)
	device_shared (device_shared const &)=delete
device_shared &	operator= (device_shared const &)=delete
	device_shared (device_shared &&)=delete
device_shared &	operator= (device_shared &&)=delete
void	destroy (gfx_device_vulkan *vulkanDevice)
atlas_rect	allocateRect (extent2 drawExtent) noexcept
	Allocate an glyph in the atlas.
void	drawInCommandBuffer (vk::CommandBuffer &commandBuffer)
void	uploadStagingPixmapToAtlas (atlas_rect location)
	Once drawing in the staging pixmap is completed, you can upload it to the atlas.
void	prepareStagingPixmapForDrawing ()
	This will transition the staging texture to 'general' for writing by the CPU.
void	prepareAtlasForRendering ()
	This will transition the atlas to 'shader-read'.
void	prepareAtlas (shaped_text const &text) noexcept
	Prepare the atlas for drawing a text.
void	place_vertices (vspan< vertex > &vertices, aarectangle clipping_rectangle, rectangle box, font_glyph_ids const &glyphs, color color) noexcept
	Place vertices for a single glyph.
void	place_vertices (vspan< vertex > &vertices, aarectangle clipping_rectangle, matrix3 transform, shaped_text const &text) noexcept
	Draw the text on the screen.
void	place_vertices (vspan< vertex > &vertices, aarectangle clipping_rectangle, matrix3 transform, shaped_text const &text, color color) noexcept
	Draw the text on the screen.

Static Public Member Functions
static aarectangle	getBoundingBox (font_glyph_ids const &glyphs) noexcept
	Get the bounding box, including draw border of a glyph.

Data Fields
gfx_device_vulkan const &	device
vk::ShaderModule	vertexShaderModule
vk::ShaderModule	fragmentShaderModule
specialization_constants	specializationConstants
std::vector< vk::SpecializationMapEntry >	fragmentShaderSpecializationMapEntries
vk::SpecializationInfo	fragmentShaderSpecializationInfo
std::vector< vk::PipelineShaderStageCreateInfo >	shaderStages
std::unordered_map< font_glyph_ids, atlas_rect >	glyphs_in_atlas
texture_map	stagingTexture
std::vector< texture_map >	atlasTextures
std::array< vk::DescriptorImageInfo, atlasMaximumNrImages >	atlasDescriptorImageInfos
vk::Sampler	atlasSampler
vk::DescriptorImageInfo	atlasSamplerDescriptorImageInfo
point3	atlas_allocation_position = {}
int	atlasAllocationMaxHeight = 0
	During allocation on a row, we keep track of the tallest glyph.

Static Public Attributes
static constexpr int	atlasImageWidth = 1024
static constexpr int	atlasImageHeight = 1024
static constexpr int	atlasMaximumNrImages = 16
static constexpr int	stagingImageWidth = 128
static constexpr int	stagingImageHeight = 128
static constexpr float	atlasTextureCoordinateMultiplier = 1.0f / atlasImageWidth
static constexpr float	drawfontSize = 28.0f
static constexpr float	drawBorder = sdf_r8::max_distance
static constexpr float	scaledDrawBorder = drawBorder / drawfontSize

Member Function Documentation

allocateRect()

atlas_rect tt::pipeline_SDF::device_shared::allocateRect ( extent2 drawExtent )

noexcept

Allocate an glyph in the atlas.

This may allocate an atlas texture, up to atlasMaximumNrImages.

destroy()

void tt::pipeline_SDF::device_shared::destroy

(

gfx_device_vulkan *

vulkanDevice

)

Deallocate vulkan resources. This is called in the destructor of gfx_device_vulkan, therefor we can not use our std::weak_ptr<gfx_device_vulkan> device.

getBoundingBox()

static aarectangle tt::pipeline_SDF::device_shared::getBoundingBox ( font_glyph_ids const & glyphs )

staticnoexcept

Get the bounding box, including draw border of a glyph.

place_vertices() [1/3]

void tt::pipeline_SDF::device_shared::place_vertices ( vspan< vertex > & vertices, aarectangle clipping_rectangle, matrix3 transform, shaped_text const & text )

noexcept

Draw the text on the screen.

Parameters

text	The box of text to draw
transform	The 2D transformation to move and rotate the box to the correct position on screen.
clippingRectangle	The clipping rectangle in screen space where glyphs should be cut off.
vertices	The vertices to draw the glyphs to.

place_vertices() [2/3]

void tt::pipeline_SDF::device_shared::place_vertices ( vspan< vertex > & vertices, aarectangle clipping_rectangle, matrix3 transform, shaped_text const & text, color color )

noexcept

Draw the text on the screen.

Parameters

text	The box of text to draw
transform	The 2D transformation to move and rotate the box to the correct position on screen.
clippingRectangle	The clipping rectangle in screen space where glyphs should be cut off.
vertices	The vertices to draw the glyphs to.
color	Override the color of the text to draw.

place_vertices() [3/3]

void tt::pipeline_SDF::device_shared::place_vertices ( vspan< vertex > & vertices, aarectangle clipping_rectangle, rectangle box, font_glyph_ids const & glyphs, color color )

noexcept

Place vertices for a single glyph.

Parameters

vertices	The list of vertices to add to.
glyphs	The font-id, composed-glyphs to render
box	The rectangle of the glyph in window coordinates; including the draw border.
color	The color of the glyph.
clippingRectangle	The rectangle to clip the glyph.

prepareAtlas()

void tt::pipeline_SDF::device_shared::prepareAtlas ( shaped_text const & text )

noexcept

Prepare the atlas for drawing a text.

prepareAtlasForRendering()

void tt::pipeline_SDF::device_shared::prepareAtlasForRendering

(

)

This will transition the atlas to 'shader-read'.

prepareStagingPixmapForDrawing()

void tt::pipeline_SDF::device_shared::prepareStagingPixmapForDrawing

(

)

This will transition the staging texture to 'general' for writing by the CPU.

uploadStagingPixmapToAtlas()

void tt::pipeline_SDF::device_shared::uploadStagingPixmapToAtlas

(

atlas_rect

location

)

Once drawing in the staging pixmap is completed, you can upload it to the atlas.

This will transition the stating texture to 'source' and the atlas to 'destination'.

Field Documentation

atlasAllocationMaxHeight

int tt::pipeline_SDF::device_shared::atlasAllocationMaxHeight = 0

During allocation on a row, we keep track of the tallest glyph.

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The documentation for this struct was generated from the following file:

• hikogui/src/ttauri/GFX/pipeline_SDF_device_shared.hpp