30 lines
1.4 KiB
Zig
30 lines
1.4 KiB
Zig
const std = @import("std");
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pub const c = @import("c.zig").c;
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pub const BlendMode = u32;
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pub const BlendOperation = enum(c_int) {
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blendoperationAdd, //dst + src: supported by all renderers
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blendoperationSubtract, //src - dst : supported by D3D, OpenGL, OpenGLES, and Vulkan
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blendoperationRevSubtract, //dst - src : supported by D3D, OpenGL, OpenGLES, and Vulkan
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blendoperationMinimum, //min(dst, src) : supported by D3D, OpenGL, OpenGLES, and Vulkan
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blendoperationMaximum,
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};
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pub const BlendFactor = enum(c_int) {
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blendfactorZero, //0, 0, 0, 0
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blendfactorOne, //1, 1, 1, 1
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blendfactorSrcColor, //srcR, srcG, srcB, srcA
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blendfactorOneMinusSrcColor, //1-srcR, 1-srcG, 1-srcB, 1-srcA
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blendfactorSrcAlpha, //srcA, srcA, srcA, srcA
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blendfactorOneMinusSrcAlpha, //1-srcA, 1-srcA, 1-srcA, 1-srcA
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blendfactorDstColor, //dstR, dstG, dstB, dstA
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blendfactorOneMinusDstColor, //1-dstR, 1-dstG, 1-dstB, 1-dstA
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blendfactorDstAlpha, //dstA, dstA, dstA, dstA
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blendfactorOneMinusDstAlpha,
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};
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pub inline fn composeCustomBlendMode(srcColorFactor: BlendFactor, dstColorFactor: BlendFactor, colorOperation: BlendOperation, srcAlphaFactor: BlendFactor, dstAlphaFactor: BlendFactor, alphaOperation: BlendOperation) BlendMode {
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return @intFromEnum(c.SDL_ComposeCustomBlendMode(srcColorFactor, dstColorFactor, @intFromEnum(colorOperation), srcAlphaFactor, dstAlphaFactor, @intFromEnum(alphaOperation)));
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}
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