VuoImageResize.c File Reference

Description

VuoImageResize implementation.

Copyright

Copyright © 2012–2018 Kosada Incorporated. This code may be modified and distributed under the terms of the MIT License. For more information, see http://vuo.org/license.

Classes
struct	VuoImageResize_internal
	VuoImageResize state data. More...

Functions
void	VuoImageResize_free (void *ir)
	Frees VuoImageResize state data. More...
VuoImageResize	VuoImageResize_make (void)
	Create and compile a resize shader for reuse with VuoImage_resizeWithShaderAndContext. More...
VuoImage	VuoImageResize_resize (VuoImage image, VuoImageResize ir, VuoSizingMode sizingMode, VuoInteger width, VuoInteger height)
	Returns a new image resized from image. More...

Variables
static const char *	applyScaleFragmentShader
	Fragment shader that scales and offsets an image. More...
static const char *	applyScaleFragmentShaderRect
	Fragment shader that scales and offsets an image. More...

---

Class Documentation

VuoImageResize_internal

struct VuoImageResize_internal

Class Members
VuoShader	shader
VuoShader	shaderRect

Function Documentation

VuoImageResize_free()

void VuoImageResize_free

(

void *

ir

)

Frees VuoImageResize state data.

VuoImageResize_make()

VuoImageResize VuoImageResize_make

(

void

)

Create and compile a resize shader for reuse with VuoImage_resizeWithShaderAndContext.

VuoImageResize_resize()

VuoImage VuoImageResize_resize	(	VuoImage	image,
		VuoImageResize	ir,
		VuoSizingMode	sizingMode,
		VuoInteger	width,
		VuoInteger	height
	)

Returns a new image resized from image.

Use with VuoImageResize_make().

Variable Documentation

applyScaleFragmentShader

const char* applyScaleFragmentShader

static

Initial value:

= VUOSHADER_GLSL_SOURCE(120,
    include(VuoGlslAlpha)

    varying vec4 fragmentTextureCoordinate;
    uniform sampler2D texture;
    uniform vec2 scale;
    uniform vec2 offset;

    bool outOfBounds(vec2 coord)
    {
        return coord.x < 0 || coord.x > 1 || coord.y < 0 || coord.y > 1;
    }

    void main(void)
    {
        vec2 uv = (fragmentTextureCoordinate.xy - offset) * scale;
        gl_FragColor = outOfBounds(uv) ? vec4(0.,0.,0.,0.) : VuoGlsl_sample(texture, uv);
    }
)

Fragment shader that scales and offsets an image.

applyScaleFragmentShaderRect

const char* applyScaleFragmentShaderRect

static

Initial value:

= VUOSHADER_GLSL_SOURCE(120,
    include(VuoGlslAlpha)

    varying vec4 fragmentTextureCoordinate;
    uniform sampler2DRect texture;
    uniform vec2 scale;
    uniform vec2 offset;
    uniform vec2 textureSize;

    bool outOfBounds(vec2 coord)
    {
        return coord.x < 0 || coord.x > 1 || coord.y < 0 || coord.y > 1;
    }

    void main(void)
    {
        vec2 uv = (fragmentTextureCoordinate.xy - offset) * scale;
        gl_FragColor = outOfBounds(uv) ? vec4(0.,0.,0.,0.) : VuoGlsl_sampleRect(texture, uv * textureSize);
    }
)

Fragment shader that scales and offsets an image.