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Grant Horner
2025-12-15 12:37:50 -05:00
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sdl3/sdl3_blendmode.odin Normal file
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package sdl3
import "core:c"
BlendMode :: distinct bit_set[BlendModeFlag; Uint32]
BlendModeFlag :: enum Uint32 {
BLEND = 0, // log2(0x00000001)
BLEND_PREMULTIPLIED = 4, // log2(0x00000010)
ADD = 1, // log2(0x00000002)
ADD_PREMULTIPLIED = 5, // log2(0x00000020)
MOD = 2, // log2(0x00000004)
MUL = 3, // log2(0x00000008)
}
BLENDMODE_NONE :: BlendMode{} /**< no blending: dstRGBA = srcRGBA */
BLENDMODE_BLEND :: BlendMode{.BLEND} /**< alpha blending: dstRGB = (srcRGB * srcA) + (dstRGB * (1-srcA)), dstA = srcA + (dstA * (1-srcA)) */
BLENDMODE_BLEND_PREMULTIPLIED :: BlendMode{.BLEND_PREMULTIPLIED} /**< pre-multiplied alpha blending: dstRGBA = srcRGBA + (dstRGBA * (1-srcA)) */
BLENDMODE_ADD :: BlendMode{.ADD} /**< additive blending: dstRGB = (srcRGB * srcA) + dstRGB, dstA = dstA */
BLENDMODE_ADD_PREMULTIPLIED :: BlendMode{.ADD_PREMULTIPLIED} /**< pre-multiplied additive blending: dstRGB = srcRGB + dstRGB, dstA = dstA */
BLENDMODE_MOD :: BlendMode{.MOD} /**< color modulate: dstRGB = srcRGB * dstRGB, dstA = dstA */
BLENDMODE_MUL :: BlendMode{.MUL} /**< color multiply: dstRGB = (srcRGB * dstRGB) + (dstRGB * (1-srcA)), dstA = dstA */
BLENDMODE_INVALID :: transmute(BlendMode)Uint32(0x7FFFFFFF)
BlendOperation :: enum c.int {
ADD = 0x1, /**< dst + src: supported by all renderers */
SUBTRACT = 0x2, /**< src - dst : supported by D3D, OpenGL, OpenGLES, and Vulkan */
REV_SUBTRACT = 0x3, /**< dst - src : supported by D3D, OpenGL, OpenGLES, and Vulkan */
MINIMUM = 0x4, /**< min(dst, src) : supported by D3D, OpenGL, OpenGLES, and Vulkan */
MAXIMUM = 0x5, /**< max(dst, src) : supported by D3D, OpenGL, OpenGLES, and Vulkan */
}
BlendFactor :: enum c.int {
ZERO = 0x1, /**< 0, 0, 0, 0 */
ONE = 0x2, /**< 1, 1, 1, 1 */
SRC_COLOR = 0x3, /**< srcR, srcG, srcB, srcA */
ONE_MINUS_SRC_COLOR = 0x4, /**< 1-srcR, 1-srcG, 1-srcB, 1-srcA */
SRC_ALPHA = 0x5, /**< srcA, srcA, srcA, srcA */
ONE_MINUS_SRC_ALPHA = 0x6, /**< 1-srcA, 1-srcA, 1-srcA, 1-srcA */
DST_COLOR = 0x7, /**< dstR, dstG, dstB, dstA */
ONE_MINUS_DST_COLOR = 0x8, /**< 1-dstR, 1-dstG, 1-dstB, 1-dstA */
DST_ALPHA = 0x9, /**< dstA, dstA, dstA, dstA */
ONE_MINUS_DST_ALPHA = 0xA, /**< 1-dstA, 1-dstA, 1-dstA, 1-dstA */
}
@(default_calling_convention="c", link_prefix="SDL_", require_results)
foreign lib {
ComposeCustomBlendMode :: proc(srcColorFactor: BlendFactor,
dstColorFactor: BlendFactor,
colorOperation: BlendOperation,
srcAlphaFactor: BlendFactor,
dstAlphaFactor: BlendFactor,
alphaOperation: BlendOperation) -> BlendMode ---
}