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Color pixel functions.

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This commit is contained in:
jussi
2022-02-27 19:31:28 +02:00
parent da446b40b6
commit c3ae0a6c28
6 changed files with 456 additions and 24 deletions
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134
API.md
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@@ -301,6 +301,50 @@ GESTURE_PINCH_IN
GESTURE_PINCH_OUT
## Globals - PixelFormats
PIXELFORMAT_UNCOMPRESSED_GRAYSCALE
PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA
PIXELFORMAT_UNCOMPRESSED_R5G6B5
PIXELFORMAT_UNCOMPRESSED_R8G8B8
PIXELFORMAT_UNCOMPRESSED_R5G5B5A1
PIXELFORMAT_UNCOMPRESSED_R4G4B4A4
PIXELFORMAT_UNCOMPRESSED_R8G8B8A8
PIXELFORMAT_UNCOMPRESSED_R32
PIXELFORMAT_UNCOMPRESSED_R32G32B32
PIXELFORMAT_UNCOMPRESSED_R32G32B32A32
PIXELFORMAT_COMPRESSED_DXT1_RGB
PIXELFORMAT_COMPRESSED_DXT1_RGBA
PIXELFORMAT_COMPRESSED_DXT3_RGBA
PIXELFORMAT_COMPRESSED_DXT5_RGBA
PIXELFORMAT_COMPRESSED_ETC1_RGB
PIXELFORMAT_COMPRESSED_ETC2_RGB
PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA
PIXELFORMAT_COMPRESSED_PVRT_RGB
PIXELFORMAT_COMPRESSED_PVRT_RGBA
PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA
PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA
## Globals - Colors
WHITE
@@ -1813,6 +1857,51 @@ Get texture size
---
> color = RL_Fade( Color color, float alpha )
Returns color with alpha applied, alpha goes from 0.0f to 1.0f
- Failure return false
- Success return Color
---
> value = RL_ColorToInt( Color color )
Returns hexadecimal value for a Color
- Failure return false
- Success return int
---
> color = RL_ColorNormalize( Color color )
Returns Color normalized as float [0..1]
- Failure return false
- Success return Vector4
---
> color = RL_ColorFromNormalized( Vector4 normalized )
Color from normalized values [0..1]
- Failure return false
- Success return Color
---
> HSV = RL_ColorToHSV( Color color )
Returns HSV values for a Color, hue [0..360], saturation/value [0..1]
- Failure return false
- Success return Vector3
---
> color = RL_ColorFromHSV( float hue, float saturation, float value )
Returns a Color from HSV values, hue [0..360], saturation/value [0..1]
@@ -1822,6 +1911,51 @@ Returns a Color from HSV values, hue [0..360], saturation/value [0..1]
---
> color = RL_ColorAlpha( Color color, float alpha )
Returns color with alpha applied, alpha goes from 0.0f to 1.0f
- Failure return false
- Success return Color
---
> color = RL_ColorAlphaBlend( Color dst, Color src, Color tint )
Returns src alpha-blended into dst color with tint
- Failure return false
- Success return Color
---
> Color = RL_GetColor( unsigned int hexValue )
Get Color structure from hexadecimal value
- Failure return false
- Success return Color
---
> Color = RL_GetPixelColor( Texture2D texture, Vector2 position )
Get pixel color from source texture
- Failure return false
- Success return Color
---
> size = RL_GetPixelDataSize( int width, int height, int format )
Get pixel data size in bytes for certain format
- Failure return false
- Success return int
---
## Text - Loading
---

21
examples/heightmap/main.lua
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@@ -70,27 +70,6 @@ function init()
matrix = RL_MatrixMultiply( RL_MatrixIdentity(), RL_MatrixTranslate( { -4, 0, -4 } ) )
end
function process( delta )
-- print( "RL_GetTouchPointCount()", RL_GetTouchPointCount() )
-- print( "RL_GetGestureDetected()", RL_GetGestureDetected() )
-- local gesture = RL_GetGestureDetected()
-- if gesture then
-- local dragVec = RL_GetGestureDragVector()
-- local pinchVec = RL_GetGesturePinchVector()
-- -- print( "gesture "..gesture, "dragVec "..dragVec[1]..", "..dragVec[2] )
-- print( "gesture "..gesture, "dragVec "..pinchVec[1]..", "..pinchVec[2] )
-- end
-- local vec = RL_GetGestureDragVector()
-- print( vec[1]..", "..vec[2] )
-- if RL_IsGestureDetected() then
-- print( RL_GetGestureDetected() )
-- end
end
function draw()
RL_ClearBackground( { 100, 150, 100 } )
RL_UpdateCamera3D( camera )

2
include/lua_core.h
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@@ -10,6 +10,7 @@ void luaRegister();
Color uluaGetColor( lua_State *L );
Vector2 uluaGetVector2( lua_State *L );
Vector3 uluaGetVector3( lua_State *L );
Vector4 uluaGetVector4( lua_State *L );
Rectangle uluaGetRectangle( lua_State *L );
Quaternion uluaGetQuaternion( lua_State *L );
Matrix uluaGetMatrix( lua_State *L );
@@ -20,6 +21,7 @@ NPatchInfo uluaGetNPatchInfo( lua_State *L );
void uluaPushColor( lua_State *L, Color color );
void uluaPushVector2( lua_State *L, Vector2 vector );
void uluaPushVector3( lua_State *L, Vector3 vector );
void uluaPushVector4( lua_State *L, Vector4 vector );
void uluaPushRectangle( lua_State *L, Rectangle rect );
void uluaPushMatrix( lua_State *L, Matrix matrix );
void uluaPushRayCollision( lua_State *L, RayCollision rayCol );

10
include/textures.h
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@@ -43,4 +43,14 @@ int ltexturesSetTextureFilter( lua_State *L );
int ltexturesSetTextureWrap( lua_State *L );
int ltexturesGetTextureSize( lua_State *L );
/* Color/pixel */
int ltexturesFade( lua_State *L );
int ltexturesColorToInt( lua_State *L );
int ltexturesColorNormalize( lua_State *L );
int ltexturesColorFromNormalized( lua_State *L );
int ltexturesColorToHSV( lua_State *L );
int ltexturesColorFromHSV( lua_State *L );
int ltexturesColorAlpha( lua_State *L );
int ltexturesColorAlphaBlend( lua_State *L );
int ltexturesGetColor( lua_State *L );
int ltexturesGetPixelColor( lua_State *L );
int ltexturesGetPixelDataSize( lua_State *L );

85
src/lua_core.c
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@@ -168,6 +168,28 @@ void defineGlobals() {
assignGlobalInt( GESTURE_SWIPE_DOWN, "GESTURE_SWIPE_DOWN" );
assignGlobalInt( GESTURE_PINCH_IN, "GESTURE_PINCH_IN" );
assignGlobalInt( GESTURE_PINCH_OUT, "GESTURE_PINCH_OUT" );
/* PixelFormats */
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_GRAYSCALE, "PIXELFORMAT_UNCOMPRESSED_GRAYSCALE" );
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA, "PIXELFORMAT_UNCOMPRESSED_GRAY_ALPHA" );
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_R5G6B5, "PIXELFORMAT_UNCOMPRESSED_R5G6B5" );
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_R8G8B8, "PIXELFORMAT_UNCOMPRESSED_R8G8B8" );
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_R5G5B5A1, "PIXELFORMAT_UNCOMPRESSED_R5G5B5A1" );
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_R4G4B4A4, "PIXELFORMAT_UNCOMPRESSED_R4G4B4A4" );
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_R8G8B8A8, "PIXELFORMAT_UNCOMPRESSED_R8G8B8A8" );
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_R32, "PIXELFORMAT_UNCOMPRESSED_R32" );
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_R32G32B32, "PIXELFORMAT_UNCOMPRESSED_R32G32B32" );
assignGlobalInt( PIXELFORMAT_UNCOMPRESSED_R32G32B32A32, "PIXELFORMAT_UNCOMPRESSED_R32G32B32A32" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_DXT1_RGB, "PIXELFORMAT_COMPRESSED_DXT1_RGB" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_DXT1_RGBA, "PIXELFORMAT_COMPRESSED_DXT1_RGBA" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_DXT3_RGBA, "PIXELFORMAT_COMPRESSED_DXT3_RGBA" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_DXT5_RGBA, "PIXELFORMAT_COMPRESSED_DXT5_RGBA" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_ETC1_RGB, "PIXELFORMAT_COMPRESSED_ETC1_RGB" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_ETC2_RGB, "PIXELFORMAT_COMPRESSED_ETC2_RGB" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA, "PIXELFORMAT_COMPRESSED_ETC2_EAC_RGBA" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_PVRT_RGB, "PIXELFORMAT_COMPRESSED_PVRT_RGB" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_PVRT_RGBA, "PIXELFORMAT_COMPRESSED_PVRT_RGBA" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA, "PIXELFORMAT_COMPRESSED_ASTC_4x4_RGBA" );
assignGlobalInt( PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA, "PIXELFORMAT_COMPRESSED_ASTC_8x8_RGBA" );
/* Colors */
assignGlobalColor( WHITE, "WHITE" );
assignGlobalColor( BLACK, "BLACK" );
@@ -488,8 +510,18 @@ void luaRegister() {
lua_register( L, "RL_SetTextureFilter", ltexturesSetTextureFilter );
lua_register( L, "RL_SetTextureWrap", ltexturesSetTextureWrap );
lua_register( L, "RL_GetTextureSize", ltexturesGetTextureSize );
/* Color/pixel */
lua_register( L, "RL_Fade", ltexturesFade );
lua_register( L, "RL_ColorToInt", ltexturesColorToInt );
lua_register( L, "RL_ColorNormalize", ltexturesColorNormalize );
lua_register( L, "RL_ColorFromNormalized", ltexturesColorFromNormalized );
lua_register( L, "RL_ColorToHSV", ltexturesColorToHSV );
lua_register( L, "RL_ColorFromHSV", ltexturesColorFromHSV );
lua_register( L, "RL_ColorAlpha", ltexturesColorAlpha );
lua_register( L, "RL_ColorAlphaBlend", ltexturesColorAlphaBlend );
lua_register( L, "RL_GetColor", ltexturesGetColor );
lua_register( L, "RL_GetPixelColor", ltexturesGetPixelColor );
lua_register( L, "RL_GetPixelDataSize", ltexturesGetPixelDataSize );
/* Models. */
/* Basic. */
@@ -700,7 +732,7 @@ Vector2 uluaGetVector2( lua_State *L ) {
Vector2 vector = { 0.0f, 0.0f };
if ( !lua_istable( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Error. Wrong vector value. Returning { 0, 0 }" );
TraceLog( LOG_WARNING, "%s", "Error. Wrong vector2 value. Returning { 0, 0 }" );
return vector;
}
int t = lua_gettop( L ), i = 0;
@@ -729,7 +761,7 @@ Vector3 uluaGetVector3( lua_State *L ) {
Vector3 vector = { 0.0f, 0.0f, 0.0f };
if ( !lua_istable( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Error. Wrong vector value. Returning { 0, 0, 0 }" );
TraceLog( LOG_WARNING, "%s", "Error. Wrong vector3 value. Returning { 0, 0, 0 }" );
return vector;
}
int t = lua_gettop( L ), i = 0;
@@ -757,6 +789,41 @@ Vector3 uluaGetVector3( lua_State *L ) {
return vector;
}
Vector4 uluaGetVector4( lua_State *L ) {
Vector4 vector = { 0.0f, 0.0f, 0.0f, 0.0f };
if ( !lua_istable( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Error. Wrong vector4 value. Returning { 0, 0, 0, 0 }" );
return vector;
}
int t = lua_gettop( L ), i = 0;
lua_pushnil( L );
while ( lua_next( L, t ) != 0 ) {
if ( lua_isnumber( L, -1 ) ) {
switch ( i ) {
case 0:
vector.x = lua_tonumber( L, -1 );
break;
case 1:
vector.y = lua_tonumber( L, -1 );
break;
case 2:
vector.z = lua_tonumber( L, -1 );
break;
case 3:
vector.w = lua_tonumber( L, -1 );
break;
default:
break;
}
}
i++;
lua_pop( L, 1 );
}
return vector;
}
Rectangle uluaGetRectangle( lua_State *L ) {
Rectangle rect = { 0.0f, 0.0f, 0.0f, 0.0f };
@@ -992,6 +1059,18 @@ void uluaPushVector3( lua_State *L, Vector3 vector ) {
lua_rawseti( L, -2, 3 );
}
void uluaPushVector4( lua_State *L, Vector4 vector ) {
lua_createtable( L, 4, 0 );
lua_pushnumber( L, vector.x );
lua_rawseti( L, -2, 1 );
lua_pushnumber( L, vector.y );
lua_rawseti( L, -2, 2 );
lua_pushnumber( L, vector.z );
lua_rawseti( L, -2, 3 );
lua_pushnumber( L, vector.w );
lua_rawseti( L, -2, 4 );
}
void uluaPushRectangle( lua_State *L, Rectangle rect ) {
lua_createtable( L, 4, 0 );
lua_pushnumber( L, rect.x );

228
src/textures.c
View File

@@ -1060,6 +1060,113 @@ int ltexturesGetTextureSize( lua_State *L ) {
## Textures - Color/pixel
*/
/*
> color = RL_Fade( Color color, float alpha )
Returns color with alpha applied, alpha goes from 0.0f to 1.0f
- Failure return false
- Success return Color
*/
int ltexturesFade( lua_State *L ) {
if ( !lua_istable( L, -2 ) || !lua_isnumber( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_Fade( Color color, float alpha )" );
lua_pushboolean( L, false );
return 1;
}
float alpha = lua_tonumber( L, -1 );
lua_pop( L, 1 );
Color color = uluaGetColor( L );
uluaPushColor( L, Fade( color, alpha ) );
return 1;
}
/*
> value = RL_ColorToInt( Color color )
Returns hexadecimal value for a Color
- Failure return false
- Success return int
*/
int ltexturesColorToInt( lua_State *L ) {
if ( !lua_istable( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_ColorToInt( Color color )" );
lua_pushboolean( L, false );
return 1;
}
Color color = uluaGetColor( L );
lua_pushinteger( L, ColorToInt( color ) );
return 1;
}
/*
> color = RL_ColorNormalize( Color color )
Returns Color normalized as float [0..1]
- Failure return false
- Success return Vector4
*/
int ltexturesColorNormalize( lua_State *L ) {
if ( !lua_istable( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_ColorNormalize( Color color )" );
lua_pushboolean( L, false );
return 1;
}
Color color = uluaGetColor( L );
uluaPushVector4( L, ColorNormalize( color ) );
return 1;
}
/*
> color = RL_ColorFromNormalized( Vector4 normalized )
Color from normalized values [0..1]
- Failure return false
- Success return Color
*/
int ltexturesColorFromNormalized( lua_State *L ) {
if ( !lua_istable( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_ColorFromNormalized( Vector4 normalized )" );
lua_pushboolean( L, false );
return 1;
}
Vector4 normalized = uluaGetVector4( L );
uluaPushColor( L, ColorFromNormalized( normalized ) );
return 1;
}
/*
> HSV = RL_ColorToHSV( Color color )
Returns HSV values for a Color, hue [0..360], saturation/value [0..1]
- Failure return false
- Success return Vector3
*/
int ltexturesColorToHSV( lua_State *L ) {
if ( !lua_istable( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_ColorToHSV( Color color )" );
lua_pushboolean( L, false );
return 1;
}
Color color = uluaGetColor( L );
uluaPushVector3( L, ColorToHSV( color ) );
return 1;
}
/*
> color = RL_ColorFromHSV( float hue, float saturation, float value )
@@ -1078,3 +1185,124 @@ int ltexturesColorFromHSV( lua_State *L ) {
return 1;
}
/*
> color = RL_ColorAlpha( Color color, float alpha )
Returns color with alpha applied, alpha goes from 0.0f to 1.0f
- Failure return false
- Success return Color
*/
int ltexturesColorAlpha( lua_State *L ) {
if ( !lua_istable( L, -2 ) || !lua_isnumber( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_ColorAlpha( Color color, float alpha )" );
lua_pushboolean( L, false );
return 1;
}
float alpha = lua_tonumber( L, -1 );
lua_pop( L, 1 );
Color color = uluaGetColor( L );
uluaPushColor( L, ColorAlpha( color, alpha ) );
return 1;
}
/*
> color = RL_ColorAlphaBlend( Color dst, Color src, Color tint )
Returns src alpha-blended into dst color with tint
- Failure return false
- Success return Color
*/
int ltexturesColorAlphaBlend( lua_State *L ) {
if ( !lua_isnumber( L, -3 ) || !lua_isnumber( L, -2 ) || !lua_isnumber( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_ColorAlphaBlend( Color dst, Color src, Color tint )" );
lua_pushboolean( L, false );
return 1;
}
Color tint = uluaGetColor( L );
lua_pop( L, 1 );
Color src = uluaGetColor( L );
lua_pop( L, 1 );
Color dst = uluaGetColor( L );
uluaPushColor( L, ColorAlphaBlend( dst, src, tint ) );
return 1;
}
/*
> Color = RL_GetColor( unsigned int hexValue )
Get Color structure from hexadecimal value
- Failure return false
- Success return Color
*/
int ltexturesGetColor( lua_State *L ) {
if ( !lua_istable( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_GetColor( unsigned int hexValue )" );
lua_pushboolean( L, false );
return 1;
}
uluaPushColor( L, GetColor( (unsigned int)lua_tointeger( L, -1 ) ) );
return 1;
}
/*
> Color = RL_GetPixelColor( Texture2D texture, Vector2 position )
Get pixel color from source texture
- Failure return false
- Success return Color
*/
int ltexturesGetPixelColor( lua_State *L ) {
if ( !lua_isnumber( L, -2 ) || !lua_istable( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_GetPixelColor( Texture2D texture, Vector2 position )" );
lua_pushboolean( L, false );
return 1;
}
Vector2 pos = uluaGetVector2( L );
lua_pop( L, 1 );
size_t texId = lua_tointeger( L, -2 );
if ( !validTexture( texId ) ) {
lua_pushboolean( L, false );
return 1;
}
Texture2D *texture = texturesGetSourceTexture( texId );
Image srcImage = LoadImageFromTexture( *texture );
uluaPushColor( L, GetImageColor( srcImage, pos.x, pos.y ) );
UnloadImage( srcImage );
return 1;
}
Color GetPixelColor(void *srcPtr, int format);
/*
> size = RL_GetPixelDataSize( int width, int height, int format )
Get pixel data size in bytes for certain format
- Failure return false
- Success return int
*/
int ltexturesGetPixelDataSize( lua_State *L ) {
if ( !lua_isnumber( L, -3 ) || !lua_isnumber( L, -2 ) || !lua_isnumber( L, -1 ) ) {
TraceLog( LOG_WARNING, "%s", "Bad call of function. RL_GetPixelDataSize( int width, int height, int format )" );
lua_pushboolean( L, false );
return 1;
}
lua_pushinteger( L, GetPixelDataSize( lua_tointeger( L, -3 ), lua_tointeger( L, -2 ), lua_tointeger( L, -1 ) ) );
return 1;
}