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sketch out more flexible texture 2d format codes

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This commit is contained in:
Ryan Fleury
2025-10-06 13:52:59 -07:00
parent 213dc6a6a7
commit af4f18ed98
3 changed files with 99 additions and 0 deletions
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src/render/render_core.h
+58
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@@ -14,6 +14,62 @@
////////////////////////////////
//~ rjf: Enums
typedef U8 R_ChannelCode; // 3 bits
typedef enum R_ChannelCodeEnum
{
R_ChannelCode_Null,
R_ChannelCode_R,
R_ChannelCode_G,
R_ChannelCode_B,
R_ChannelCode_A,
}
R_ChannelCodeEnum;
typedef U8 R_ChannelSizeKind; // 3 bits
typedef enum R_ChannelSizeKindEnum
{
R_ChannelSizeKind_Null,
R_ChannelSizeKind_2,
R_ChannelSizeKind_8,
R_ChannelSizeKind_10,
R_ChannelSizeKind_11,
R_ChannelSizeKind_16,
R_ChannelSizeKind_24,
R_ChannelSizeKind_32,
}
R_ChannelSizeKindEnum;
typedef U8 R_ChannelTypeKind; // 3 bits
typedef enum R_ChannelTypeKindEnum
{
R_ChannelTypeKind_Null,
R_ChannelTypeKind_UInt,
R_ChannelTypeKind_SInt,
R_ChannelTypeKind_UNorm,
R_ChannelTypeKind_SNorm,
R_ChannelTypeKind_Float,
}
R_ChannelTypeKindEnum;
typedef U64 R_Tex2DFmt;
//
// set of channels, each channel including {code, size, type kind}, 3 bits each:
// [0, 3) -> channel code
// [3, 6) -> channel size
// [6, 9) -> channel type kind
//
// 9 bits per channel, * number of channels, e.g. 4 channels -> 36 bits
#define R_Channel(channel_idx, code_name, size_kind_name, type_kind_name) ((((U64)(R_ChannelCode_##code_name & 0x7)) | ((U64)(R_ChannelSizeKind_##size_kind_name & 0x7) << 3) | ((U64)(R_ChannelTypeKind_##type_kind_name & 0x7) << 6)) << ((channel_idx)*9))
#define r_code_from_tex2dfmt_channel(fmt, channel_idx) ((R_ChannelCode)(((fmt) & (0x7<<((channel_idx)*9))) >> ((channel_idx)*9)))
#define r_size_kind_from_tex2dfmt_channel(fmt, channel_idx) ((R_ChannelSizeKind)(((fmt) & (0x38<<((channel_idx)*9))) >> ((channel_idx)*9 + 3)))
#define r_type_kind_from_tex2dfmt_channel(fmt, channel_idx) ((R_ChannelTypeKind)(((fmt) & (0x1c0<<((channel_idx)*9))) >> ((channel_idx)*9 + 6)))
#define R_Tex2DFmt_R8 (R_Channel(0, R, 8, UInt))
#define R_Tex2DFmt_RG8 (R_Channel(0, R, 8, UInt) | R_Channel(1, G, 8, UInt))
#define R_Tex2DFmt_RGB8 (R_Channel(0, R, 8, UInt) | R_Channel(1, G, 8, UInt) | R_Channel(2, B, 8, UInt))
#define R_Tex2DFmt_RGBA8 (R_Channel(0, R, 8, UInt) | R_Channel(1, G, 8, UInt) | R_Channel(2, B, 8, UInt) | R_Channel(3, A, 8, UInt))
typedef U32 R_GeoVertexFlags;
enum
{
@@ -197,6 +253,8 @@ struct R_PassList
////////////////////////////////
//~ rjf: Helpers
internal U64 r_bytes_per_pixel_from_tex2dfmt(R_Tex2DFmt fmt);
internal Mat4x4F32 r_sample_channel_map_from_tex2dfmt(R_Tex2DFmt fmt);
internal Mat4x4F32 r_sample_channel_map_from_tex2dformat(R_Tex2DFormat fmt);
////////////////////////////////