lv_opengles_private.h

API reference for lv_opengles_private.h

Summary

Functions

private/drivers/opengles/lv_opengles_private.h:159function

lv_opengles_render_params_init

Initialize the render parameters with default values

void lv_opengles_render_params_init(lv_opengles_render_params_t *params)

Name	Type	Description
`params`	`lv_opengles_render_params_t *`	pointer to an initialized `lv_opengles_render_params_t` struct

private/drivers/opengles/lv_opengles_private.h:165function

lv_opengles_render

Render the content of the window/framebuffer using OpenGL

void lv_opengles_render(const lv_opengles_render_params_t *params)

Name	Type	Description
`params`	`const lv_opengles_render_params_t *`	pointer to an initialized `lv_opengles_render_params_t` struct

private/drivers/opengles/lv_opengles_private.h:180function

lv_opengles_render_texture_cf

Render a texture holding pixels of an LVGL color format, using alternate blending mode. The channel order and the grayscale handling are derived from cf.

void lv_opengles_render_texture_cf(unsigned int texture, const lv_area_t *texture_area, lv_opa_t opa, int32_t disp_w, int32_t disp_h, const lv_area_t *texture_clip_area, bool h_flip, bool v_flip, lv_color_format_t cf)

Name	Type	Description
`texture`	`unsigned int`	OpenGL texture ID
`texture_area`	`const lv_area_t *`	the area in the window to render the texture in
`opa`	`lv_opa_t`	opacity to blend the texture with existing contents
`disp_w`	`int32_t`	width of the window/framebuffer being rendered to
`disp_h`	`int32_t`	height of the window/framebuffer being rendered to
`texture_clip_area`	`const lv_area_t *`	the area of the texture to draw
`h_flip`	`bool`	horizontal flip
`v_flip`	`bool`	vertical flip
`cf`	`lv_color_format_t`	the LVGL color format the texture was uploaded from

private/drivers/opengles/lv_opengles_private.h:191function

lv_opengles_regular_viewport

Set the OpenGL viewport, with vertical co-ordinate conversion

void lv_opengles_regular_viewport(int32_t x, int32_t y, int32_t w, int32_t h)

Name	Type	Description
`x`	`int32_t`	x position of the viewport
`y`	`int32_t`	y position of the viewport
`w`	`int32_t`	width of the viewport
`h`	`int32_t`	height of the viewport

private/drivers/opengles/lv_opengles_private.h:193function

lv_opengles_render_display

void lv_opengles_render_display(lv_display_t *display, const lv_opengles_render_params_t *params)

Name	Type
`display`	`lv_display_t *`
`params`	`const lv_opengles_render_params_t *`

private/drivers/opengles/lv_opengles_private.h:199function

lv_opengles_render_texture_internal

void lv_opengles_render_texture_internal(unsigned int texture, const lv_area_t *texture_area, lv_opa_t opa, int32_t disp_w, int32_t disp_h, const lv_area_t *texture_clip_area, bool h_flip, bool v_flip)

Name	Type
`texture`	`unsigned int`
`texture_area`	`const lv_area_t *`
`opa`	`lv_opa_t`
`disp_w`	`int32_t`
`disp_h`	`int32_t`
`texture_clip_area`	`const lv_area_t *`
`h_flip`	`bool`
`v_flip`	`bool`

private/drivers/opengles/lv_opengles_private.h:206function

lv_opengles_render_display_texture_internal

void lv_opengles_render_display_texture_internal(lv_display_t *display, bool h_flip, bool v_flip)

Name	Type
`display`	`lv_display_t *`
`h_flip`	`bool`
`v_flip`	`bool`

private/drivers/opengles/lv_opengles_private.h:214function

lv_opengles_gl_format_from_color_format

Get the glTexImage2D arguments to upload a buffer of an LVGL color format with

lv_result_t lv_opengles_gl_format_from_color_format(lv_color_format_t cf, lv_opengles_gl_format_t *gl_format)

Name	Type	Description
`cf`	`lv_color_format_t`	the LVGL color format
`gl_format`	`lv_opengles_gl_format_t *`	pointer to the struct to fill

Returns: lv_result_t — LV_RESULT_OK on success, LV_RESULT_INVALID if cf has no OpenGL equivalent

private/drivers/opengles/lv_opengles_private.h:216function

lv_opengles_color_format_is_rb_swap

bool lv_opengles_color_format_is_rb_swap(lv_color_format_t cf)

Name	Type
`cf`	`lv_color_format_t`

private/drivers/opengles/lv_opengles_private.h:218function

lv_opengles_color_format_is_premultiplied

bool lv_opengles_color_format_is_premultiplied(lv_color_format_t cf)

Name	Type
`cf`	`lv_color_format_t`

private/drivers/opengles/lv_opengles_private.h:230function

lv_opengles_texture_upload_buf

Upload a pixel buffer into an OpenGL texture

lv_result_t lv_opengles_texture_upload_buf(unsigned int texture_id, const void *buf, int32_t w, int32_t h, uint32_t stride, lv_color_format_t cf)

Name	Type	Description
`texture_id`	`unsigned int`	the OpenGL texture ID to upload into
`buf`	`const void *`	the pixel buffer. May be `NULL`.. Can be `NULL` to only define the size and the format
`w`	`int32_t`	width of the buffer in pixels
`h`	`int32_t`	height of the buffer in pixels
`stride`	`uint32_t`	stride of the buffer in bytes. Ignored when `buf` is `NULL`
`cf`	`lv_color_format_t`	the LVGL color format of the buffer

Returns: lv_result_t — LV_RESULT_OK on success, LV_RESULT_INVALID if cf has no OpenGL equivalent

private/drivers/opengles/lv_opengles_private.h:242function

lv_opengles_texture_upload_display_buf

Upload the rendered buffer of a display into an OpenGL texture. The size and the color format are taken from the display.

lv_result_t lv_opengles_texture_upload_display_buf(unsigned int texture_id, lv_display_t *display, const void *buf)

Name	Type	Description
`texture_id`	`unsigned int`	the OpenGL texture ID to upload into
`display`	`lv_display_t *`	the display the buffer belongs to
`buf`	`const void *`	the pixel buffer. May be `NULL`.. Can be `NULL` to only define the size and the format

Returns: lv_result_t — LV_RESULT_OK on success, LV_RESULT_INVALID if the color format of the display has no OpenGL equivalent

Structs

struct

lv_opengles_render_params_t

Member	Type	Description
`texture`	`unsigned int`
`texture_area`	`const lv_area_t *`
`opa`	`lv_opa_t`
`disp_w`	`int32_t`
`disp_h`	`int32_t`
`texture_clip_area`	`const lv_area_t *`
`h_flip`	`bool`
`v_flip`	`bool`
`rb_swap`	`bool`
`fill_color`	`lv_color_t`
`blend_opt`	`bool`
`matrix`	`const lv_matrix_t *`
`cf`	`lv_color_format_t`

Used by 3 functions

lv_opengles_render_params_init — param params
lv_opengles_render — param params
lv_opengles_render_display — param params

struct

lv_opengles_gl_format_t

The glTexImage2D arguments describing an LVGL color format

Member	Type	Description
`internal_format`	`int32_t`	the `internalformat` argument of `glTexImage2D`
`format`	`uint32_t`	the `format` argument of `glTexImage2D`
`type`	`uint32_t`	the `type` argument of `glTexImage2D`
`rb_swap`	`bool`	the red and blue channels have to be swapped while rendering
`premultiplied`	`bool`	the color channels are multiplied with the alpha channel already

Used by 1 function

lv_opengles_gl_format_from_color_format — param gl_format

Macros

private/drivers/opengles/lv_opengles_private.h:43macro

GL_BGRA

#define GL_BGRA GL_BGRA_EXT

private/drivers/opengles/lv_opengles_private.h:47macro

GL_TEXTURE_MAX_LEVEL

#define GL_TEXTURE_MAX_LEVEL GL_TEXTURE_MAX_LEVEL_APPLE

private/drivers/opengles/lv_opengles_private.h:51macro

GL_UNPACK_ROW_LENGTH

#define GL_UNPACK_ROW_LENGTH GL_UNPACK_ROW_LENGTH_EXT

private/drivers/opengles/lv_opengles_private.h:55macro

glGenVertexArrays

#define glGenVertexArrays glGenVertexArraysOES

private/drivers/opengles/lv_opengles_private.h:59macro

glBindVertexArray

#define glBindVertexArray glBindVertexArrayOES

private/drivers/opengles/lv_opengles_private.h:63macro

glDeleteVertexArrays

#define glDeleteVertexArrays glDeleteVertexArraysOES

private/drivers/opengles/lv_opengles_private.h:67macro

glTexStorage2D

#define glTexStorage2D glTexStorage2DEXT

private/drivers/opengles/lv_opengles_private.h:71macro

GL_RGBA32F

#define GL_RGBA32F 0x8814

private/drivers/opengles/lv_opengles_private.h:74macro

GL_NUM_EXTENSIONS

#define GL_NUM_EXTENSIONS 0x821D

private/drivers/opengles/lv_opengles_private.h:78macro

GL_RGB8

#define GL_RGB8 0x8051

private/drivers/opengles/lv_opengles_private.h:82macro

GL_RGBA8

#define GL_RGBA8 0x8058

private/drivers/opengles/lv_opengles_private.h:93macro

GL_R8

#define GL_R8 GL_LUMINANCE

private/drivers/opengles/lv_opengles_private.h:97macro

GL_RED

#define GL_RED GL_LUMINANCE

private/drivers/opengles/lv_opengles_private.h:117macro

LV_GL_PREFERRED_DEPTH

#define LV_GL_PREFERRED_DEPTH GL_DEPTH_COMPONENT16

Dependencies

lvgl_public.h
gles2.h
egl.h
glfw3.h

lv_opengles_private.h

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