Blend modes example.
This commit is contained in:
jussi
187
examples/blend_modes/main.lua
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187
examples/blend_modes/main.lua
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package.path = package.path..";"..RL.GetBasePath().."../resources/lib/?.lua"
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Vector2 = require( "vector2" )
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local monitor = 0
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local winSize = Vector2:new( 1920, 1080 )
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local catTex = nil
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local tileTex = nil
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local lightTex = nil
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local lightTexSize = Vector2:new()
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local buttonSize = Vector2:new( 20, 20 )
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local fontSize = 20
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local textTint = RL.BLACK
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local framebuffer = nil
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local blendMode = {
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mode = 1,
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options = {
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{ name = "BLEND_ALPHA", value = RL.BLEND_ALPHA },
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{ name = "BLEND_ADDITIVE", value = RL.BLEND_ADDITIVE },
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{ name = "BLEND_MULTIPLIED", value = RL.BLEND_MULTIPLIED },
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{ name = "BLEND_ADD_COLORS", value = RL.BLEND_ADD_COLORS },
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{ name = "BLEND_SUBTRACT_COLORS", value = RL.BLEND_SUBTRACT_COLORS },
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{ name = "BLEND_ALPHA_PREMULTIPLY", value = RL.BLEND_ALPHA_PREMULTIPLY },
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{ name = "BLEND_CUSTOM", value = RL.BLEND_CUSTOM },
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{ name = "BLEND_CUSTOM_SEPARATE", value = RL.BLEND_CUSTOM_SEPARATE },
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}
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}
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local blendFactor = {
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srcRGB = 1,
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dstRGB = 1,
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srcAlpha = 1,
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dstAlpha = 1,
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options = {
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{ name = "RL_ZERO", value = RL.RL_ZERO },
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{ name = "RL_ONE", value = RL.RL_ONE },
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{ name = "RL_SRC_COLOR", value = RL.RL_SRC_COLOR },
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{ name = "RL_ONE_MINUS_SRC_COLOR", value = RL.RL_ONE_MINUS_SRC_COLOR },
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{ name = "RL_SRC_ALPHA", value = RL.RL_SRC_ALPHA },
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{ name = "RL_ONE_MINUS_SRC_ALPHA", value = RL.RL_ONE_MINUS_SRC_ALPHA },
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{ name = "RL_DST_ALPHA", value = RL.RL_DST_ALPHA },
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{ name = "RL_ONE_MINUS_DST_ALPHA", value = RL.RL_ONE_MINUS_DST_ALPHA },
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{ name = "RL_DST_COLOR", value = RL.RL_DST_COLOR },
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{ name = "RL_ONE_MINUS_DST_COLOR", value = RL.RL_ONE_MINUS_DST_COLOR },
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{ name = "RL_SRC_ALPHA_SATURATE", value = RL.RL_SRC_ALPHA_SATURATE },
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{ name = "RL_CONSTANT_COLOR", value = RL.RL_CONSTANT_COLOR },
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{ name = "RL_ONE_MINUS_CONSTANT_COLOR", value = RL.RL_ONE_MINUS_CONSTANT_COLOR },
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{ name = "RL_CONSTANT_ALPHA", value = RL.RL_CONSTANT_ALPHA },
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{ name = "RL_ONE_MINUS_CONSTANT_ALPHA", value = RL.RL_ONE_MINUS_CONSTANT_ALPHA },
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}
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}
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local blendFunction = {
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eqRGB = 1,
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eqAlpha = 1,
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options = {
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{ name = "RL_FUNC_ADD", value = RL.RL_FUNC_ADD },
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{ name = "RL_MIN", value = RL.RL_MIN },
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{ name = "RL_MAX", value = RL.RL_MAX },
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{ name = "RL_FUNC_SUBTRACT", value = RL.RL_FUNC_SUBTRACT },
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{ name = "RL_FUNC_REVERSE_SUBTRACT", value = RL.RL_FUNC_REVERSE_SUBTRACT },
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{ name = "RL_BLEND_EQUATION", value = RL.RL_BLEND_EQUATION },
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{ name = "RL_BLEND_EQUATION_RGB", value = RL.RL_BLEND_EQUATION_RGB },
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{ name = "RL_BLEND_EQUATION_ALPHA", value = RL.RL_BLEND_EQUATION_ALPHA },
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{ name = "RL_BLEND_DST_RGB", value = RL.RL_BLEND_DST_RGB },
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{ name = "RL_BLEND_SRC_RGB", value = RL.RL_BLEND_SRC_RGB },
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{ name = "RL_BLEND_DST_ALPHA", value = RL.RL_BLEND_DST_ALPHA },
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{ name = "RL_BLEND_SRC_ALPHA", value = RL.RL_BLEND_SRC_ALPHA },
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{ name = "RL_BLEND_COLOR", value = RL.RL_BLEND_COLOR },
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}
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}
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function RL.init()
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RL.SetWindowTitle( "Blend modes" )
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RL.SetWindowState( RL.FLAG_VSYNC_HINT )
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RL.SetWindowSize( winSize )
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local monitorPos = Vector2:newT( RL.GetMonitorPosition( monitor ) )
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local monitorSize = Vector2:newT( RL.GetMonitorSize( monitor ) )
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RL.SetWindowPosition( { monitorPos.x + monitorSize.x / 2 - winSize.x / 2, monitorPos.y + monitorSize.y / 2 - winSize.y / 2 } )
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local path = RL.GetBasePath().."../resources/images/"
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catTex = RL.LoadTexture( path.."cat.png" )
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RL.SetTextureWrap( catTex, RL.TEXTURE_WRAP_REPEAT )
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tileTex = RL.LoadTexture( path.."tile.png" )
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RL.SetTextureWrap( tileTex, RL.TEXTURE_WRAP_REPEAT )
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lightTex = RL.LoadTexture( path.."light.png" )
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lightTexSize:setT( RL.GetTextureSize( lightTex ) )
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framebuffer = RL.LoadRenderTexture( winSize )
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end
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function RL.update( delta )
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end
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local function drawControl( pos, t, name )
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if RL.GuiButton( { pos.x, pos.y, buttonSize.x, buttonSize.y }, RL.GuiIconText( RL.ICON_ARROW_LEFT, "" ) ) == 1 then
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t[ name ] = 1 < t[ name ] and t[ name ] - 1 or #t.options
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end
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pos.x = pos.x + buttonSize.x + 2
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if RL.GuiButton( { pos.x, pos.y, buttonSize.x, buttonSize.y }, RL.GuiIconText( RL.ICON_ARROW_RIGHT, "" ) ) == 1 then
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t[ name ] = t[ name ] < #t.options and t[ name ] + 1 or 1
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end
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pos.x = pos.x + buttonSize.x + 2
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RL.DrawText( name..": "..t.options[ t[ name ] ].name, pos, fontSize, textTint )
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pos.x = 2
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pos.y = pos.y + 2 + buttonSize.y
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end
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local function drawControls()
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local pos = Vector2:new( 2 )
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-- Blend mode.
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drawControl( pos, blendMode, "mode" )
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-- Blend RPG.
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pos.y = pos.y + 8
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drawControl( pos, blendFactor, "srcRGB" )
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drawControl( pos, blendFactor, "dstRGB" )
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drawControl( pos, blendFunction, "eqRGB" )
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-- Blend Alpha.
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pos.y = pos.y + 8
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drawControl( pos, blendFactor, "srcAlpha" )
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drawControl( pos, blendFactor, "dstAlpha" )
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drawControl( pos, blendFunction, "eqAlpha" )
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end
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function RL.draw()
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local mousePos = Vector2:newT( RL.GetMousePosition() )
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RL.ClearBackground( RL.BLACK )
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if framebuffer then
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RL.BeginTextureMode( framebuffer )
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RL.ClearBackground( RL.BLACK )
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RL.DrawTexturePro( catTex,
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{ 0, 0, winSize.x, winSize.y },
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{ 0, 0, winSize.x, winSize.y },
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{ 0, 0 },
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0.0,
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RL.WHITE
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)
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RL.rlSetBlendFactors(
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blendFactor.options[ blendFactor.srcRGB ].value,
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blendFactor.options[ blendFactor.dstRGB ].value,
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blendFunction.options[ blendFunction.eqRGB ].value
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)
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RL.rlSetBlendFactorsSeparate(
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blendFactor.options[ blendFactor.srcRGB ].value,
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blendFactor.options[ blendFactor.dstRGB ].value,
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blendFactor.options[ blendFactor.srcAlpha ].value,
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blendFactor.options[ blendFactor.dstAlpha ].value,
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blendFunction.options[ blendFunction.eqRGB ].value,
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blendFunction.options[ blendFunction.eqAlpha ].value
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)
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RL.BeginBlendMode( blendMode.options[ blendMode.mode ].value )
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RL.DrawTexture( lightTex, mousePos - lightTexSize:scale( 0.5 ), RL.WHITE )
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RL.EndBlendMode()
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RL.EndTextureMode()
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end
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RL.DrawTexturePro( tileTex,
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{ 0, 0, winSize.x, winSize.y },
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{ 0, 0, winSize.x, winSize.y },
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{ 0, 0 },
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0.0,
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RL.WHITE
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)
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RL.DrawTexturePro(
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RL.GetRenderTextureTexture( framebuffer ),
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{ 0, 0, winSize.x, -winSize.y },
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{ 0, 0, winSize.x, winSize.y },
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{ 0, 0 },
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0.0,
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RL.WHITE
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)
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RL.DrawRectangle( { 0, 0, 550, 180 }, { 255, 255, 255, 200 } )
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drawControls()
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end
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