Osd class - hardware accelerated (OpenGL/ES) More...

#include <algorithm>
#include "openglosd.h"
#include "glhelpers.h"
#include <inttypes.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <vector>
#include <sys/ioctl.h>
#include "logger.h"

Include dependency graph for openglosd.cpp:

Go to the source code of this file.

Macros
#define	__STL_CONFIG_H

#define	BORDERCOLOR 0x00000000

#define	KERNING_UNKNOWN (-10000)

Functions
void	ConvertColor (const GLint &colARGB, glm::vec4 &col)

Variables
const char *	rectVertexShader

const char *	rectFragmentShader

const char *	textureVertexShader

const char *	textureFragmentShader

const char *	textureFragmentShaderSwapBR

const char *	textVertexShader

const char *	textFragmentShader

static cShader *	Shaders [stCount]

static cOglVb *	VertexBuffers [vbCount]

Detailed Description

Osd class - hardware accelerated (OpenGL/ES)

This file defines cOglOsd and all other osd classes, which create and handle the OpenGL accelerated OSD.

Note: This file was originally authored by Stefan Braun (see README), but there was never set any copyright info.

Copyright: (c) 2025 by Andreas Baierl. All Rights Reserved.

License

AGPLv3

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details.

Definition in file openglosd.cpp.

Macro Definition Documentation

◆ __STL_CONFIG_H

#define __STL_CONFIG_H

Definition at line 25 of file openglosd.cpp.

◆ BORDERCOLOR

#define BORDERCOLOR 0x00000000

Definition at line 46 of file openglosd.cpp.

◆ KERNING_UNKNOWN

#define KERNING_UNKNOWN (-10000)

Definition at line 426 of file openglosd.cpp.

Function Documentation

◆ ConvertColor()

void ConvertColor	(	const GLint &	colARGB,
		glm::vec4 &	col
	)

Definition at line 161 of file openglosd.cpp.

Referenced by cOglCmdFill::Execute(), cOglCmdBufferFill::Execute(), cOglVb::SetShaderBorderColor(), and cOglVb::SetShaderColor().

Variable Documentation

◆ rectFragmentShader

const char* rectFragmentShader

Initial value:

=
"#version 100 \n\
precision mediump float; \
varying vec4 rectCol; \
\
void main() \
{ \
    gl_FragColor = rectCol; \
} \
"

Definition at line 186 of file openglosd.cpp.

Referenced by cShader::Load().

◆ rectVertexShader

const char* rectVertexShader

Initial value:

=
"#version 100 \n\
\
attribute vec2 position; \
varying vec4 rectCol; \
uniform vec4 inColor; \
uniform mat4 projection; \
\
void main() \
{ \
    gl_Position = projection * vec4(position.x, position.y, 0.0, 1.0); \
    rectCol = inColor; \
} \
"

Definition at line 171 of file openglosd.cpp.

Referenced by cShader::Load().

◆ Shaders

cShader* Shaders[stCount]

static

Definition at line 306 of file openglosd.cpp.

Referenced by cOglVb::ActivateShader(), cOglThread::DeleteShaders(), cOglThread::InitShaders(), cOglVb::SetShaderAlpha(), cOglVb::SetShaderBorderColor(), cOglVb::SetShaderColor(), cOglVb::SetShaderProjectionMatrix(), and cOglVb::SetShaderTexture().

◆ textFragmentShader

const char* textFragmentShader

Initial value:

=
"#version 100 \n\
precision mediump float; \
varying vec2 TexCoords; \
varying vec4 textColor; \
\
uniform sampler2D glyphTexture; \
\
void main() \
{  \
    vec4 sampled = vec4(1.0, 1.0, 1.0, texture2D(glyphTexture, TexCoords).r); \
    gl_FragColor = textColor * sampled; \
} \
"

Definition at line 291 of file openglosd.cpp.

Referenced by cShader::Load().

◆ textureFragmentShader

const char* textureFragmentShader

Initial value:

=
"#version 100 \n\
precision mediump float; \
varying vec2 TexCoords; \
varying vec4 alphaValue; \
varying vec4 bColorValue; \
\
uniform sampler2D screenTexture; \
\
float clamp_to_border_factor (vec2 coords) \
{ \
    bvec2 out1 = greaterThan (coords, vec2 (1,1)); \
    bvec2 out2 = lessThan (coords, vec2 (0,0)); \
    bool do_clamp = (any (out1) || any (out2)); \
    return float (!do_clamp); \
} \
\
void main() \
{ \
    vec4 color = texture2D(screenTexture, TexCoords) * alphaValue; \
    float f = clamp_to_border_factor (TexCoords); \
    gl_FragColor = mix (bColorValue, color, f); \
} \
"

Definition at line 220 of file openglosd.cpp.

Referenced by cShader::Load().

◆ textureFragmentShaderSwapBR

const char* textureFragmentShaderSwapBR

Initial value:

=
"#version 100 \n\
precision mediump float; \
varying vec2 TexCoords; \
varying vec4 alphaValue; \
varying vec4 bColorValue; \
\
uniform sampler2D screenTexture; \
\
float clamp_to_border_factor (vec2 coords) \
{ \
    bvec2 out1 = greaterThan (coords, vec2 (1,1)); \
    bvec2 out2 = lessThan (coords, vec2 (0,0)); \
    bool do_clamp = (any (out1) || any (out2)); \
    return float (!do_clamp); \
} \
\
void main() \
{ \
    vec4 color = texture2D(screenTexture, TexCoords) * alphaValue; \
    vec4 color_swapped = vec4(color.b, color.g, color.r, color.a); \
    float f = clamp_to_border_factor (TexCoords); \
    gl_FragColor = mix (bColorValue, color_swapped, f); \
} \
"

Definition at line 245 of file openglosd.cpp.

Referenced by cShader::Load().

◆ textureVertexShader

const char* textureVertexShader

Initial value:

=
"#version 100 \n\
\
attribute vec2 position; \
attribute vec2 texCoords; \
\
varying vec2 TexCoords; \
varying vec4 alphaValue;\
varying vec4 bColorValue;\
\
uniform vec4 bColor; \
uniform mat4 projection; \
uniform vec4 alpha; \
\
void main() \
{ \
    gl_Position = projection * vec4(position.x, position.y, 0.0, 1.0); \
    TexCoords = texCoords; \
    alphaValue = alpha; \
    bColorValue = bColor; \
} \
"

Definition at line 197 of file openglosd.cpp.

Referenced by cShader::Load().

◆ textVertexShader

const char* textVertexShader

Initial value:

=
"#version 100 \n\
\
attribute vec2 position; \
attribute vec2 texCoords; \
\
varying vec2 TexCoords; \
varying vec4 textColor; \
\
uniform mat4 projection; \
uniform vec4 inColor; \
\
void main() \
{ \
    gl_Position = projection * vec4(position.x, position.y, 0.0, 1.0); \
    TexCoords = texCoords; \
    textColor = inColor; \
} \
"

Definition at line 271 of file openglosd.cpp.

Referenced by cShader::Load().

◆ VertexBuffers

cOglVb* VertexBuffers[vbCount]

static

Definition at line 1025 of file openglosd.cpp.

Referenced by cOglThread::DeleteVertexBuffers(), cOglCmdRenderFbToBufferFb::Execute(), cOglCmdCopyBufferToOutputFb::Execute(), cOglCmdDrawRectangle::Execute(), cOglCmdDrawEllipse::Execute(), cOglCmdDrawSlope::Execute(), cOglCmdDrawText::Execute(), cOglCmdDrawImage::Execute(), cOglCmdDrawTexture::Execute(), cOglThread::InitOpenGL(), and cOglThread::InitVertexBuffers().

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ __STL_CONFIG_H

◆ BORDERCOLOR

◆ KERNING_UNKNOWN

Function Documentation

◆ ConvertColor()

Variable Documentation

◆ rectFragmentShader

◆ rectVertexShader

◆ Shaders

◆ textFragmentShader

◆ textureFragmentShader

◆ textureFragmentShaderSwapBR

◆ textureVertexShader

◆ textVertexShader

◆ VertexBuffers