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true 16-bit color... glorious

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This commit is contained in:
asrael 2025-11-28 14:41:35 -06:00
parent 3dccce8a81
commit b1e8525c3e
30 changed files with 678 additions and 652 deletions
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16
src/pxl8_io.h
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@ -10,18 +10,24 @@ typedef struct {
const u8* bytes;
u32 offset;
u32 size;
bool overflow;
} pxl8_stream;
static inline pxl8_stream pxl8_stream_create(const u8* bytes, u32 size) {
return (pxl8_stream){
.bytes = bytes,
.offset = 0,
.size = size
.size = size,
.overflow = false
};
}
static inline bool pxl8_stream_can_read(const pxl8_stream* stream, u32 count) {
return stream->offset + count <= stream->size;
return !stream->overflow && stream->offset + count <= stream->size;
}
static inline bool pxl8_stream_has_overflow(const pxl8_stream* stream) {
return stream->overflow;
}
static inline void pxl8_stream_seek(pxl8_stream* stream, u32 offset) {
@ -33,16 +39,19 @@ static inline u32 pxl8_stream_position(const pxl8_stream* stream) {
}
static inline u8 pxl8_read_u8(pxl8_stream* stream) {
if (stream->offset + 1 > stream->size) { stream->overflow = true; return 0; }
return stream->bytes[stream->offset++];
}
static inline u16 pxl8_read_u16(pxl8_stream* stream) {
if (stream->offset + 2 > stream->size) { stream->overflow = true; return 0; }
u16 val = (u16)stream->bytes[stream->offset] | ((u16)stream->bytes[stream->offset + 1] << 8);
stream->offset += 2;
return val;
}
static inline u32 pxl8_read_u32(pxl8_stream* stream) {
if (stream->offset + 4 > stream->size) { stream->overflow = true; return 0; }
u32 val = (u32)stream->bytes[stream->offset] |
((u32)stream->bytes[stream->offset + 1] << 8) |
((u32)stream->bytes[stream->offset + 2] << 16) |
@ -67,16 +76,19 @@ static inline f32 pxl8_read_f32(pxl8_stream* stream) {
}
static inline void pxl8_read_bytes(pxl8_stream* stream, void* dest, u32 count) {
if (stream->offset + count > stream->size) { stream->overflow = true; return; }
for (u32 i = 0; i < count; i++) {
((u8*)dest)[i] = stream->bytes[stream->offset++];
}
}
static inline void pxl8_skip_bytes(pxl8_stream* stream, u32 count) {
if (stream->offset + count > stream->size) { stream->overflow = true; return; }
stream->offset += count;
}
static inline const u8* pxl8_read_ptr(pxl8_stream* stream, u32 count) {
if (stream->offset + count > stream->size) { stream->overflow = true; return NULL; }
const u8* ptr = &stream->bytes[stream->offset];
stream->offset += count;
return ptr;