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package sdl2
import "core:c"
when ODIN_OS == .Windows {
@(ignore_duplicates)
foreign import lib "SDL2.lib"
} else {
@(ignore_duplicates)
foreign import lib "system:SDL2"
}
/**
* \brief The blend mode used in SDL_RenderCopy() and drawing operations.
*/
BlendMode :: enum c.int {
NONE = 0x00000000, /**< no blending
dstRGBA = srcRGBA */
BLEND = 0x00000001, /**< alpha blending
dstRGB = (srcRGB * srcA) + (dstRGB * (1-srcA))
dstA = srcA + (dstA * (1-srcA)) */
ADD = 0x00000002, /**< additive blending
dstRGB = (srcRGB * srcA) + dstRGB
dstA = dstA */
MOD = 0x00000004, /**< color modulate
dstRGB = srcRGB * dstRGB
dstA = dstA */
MUL = 0x00000008, /**< color multiply
dstRGB = (srcRGB * dstRGB) + (dstRGB * (1-srcA))
dstA = (srcA * dstA) + (dstA * (1-srcA)) */
INVALID = 0x7FFFFFFF,
/* Additional custom blend modes can be returned by ComposeCustomBlendMode() */
}
/**
* \brief The blend operation used when combining source and destination pixel components
*/
BlendOperation :: enum c.int {
ADD = 0x1, /**< dst + src: supported by all renderers */
SUBTRACT = 0x2, /**< dst - src : supported by D3D9, D3D11, OpenGL, OpenGLES */
REV_SUBTRACT = 0x3, /**< src - dst : supported by D3D9, D3D11, OpenGL, OpenGLES */
MINIMUM = 0x4, /**< min(dst, src) : supported by D3D11 */
MAXIMUM = 0x5, /**< max(dst, src) : supported by D3D11 */
}
/**
* \brief The normalized factor used to multiply pixel components
*/
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_")
foreign lib {
ComposeCustomBlendMode :: proc(srcColorFactor, dstColorFactor: BlendFactor, colorOperation: BlendOperation,
srcAlphaFactor, dstAlphaFactor: BlendFactor, alphaOperation: BlendOperation) -> BlendMode ---
}
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