text sw emulation

2021-04-15 22:34:04 -07:00
parent 66ff74eb97
commit a9f91b7acd
8 changed files with 749 additions and 4836 deletions
--- a/driver/tests/tex_demo/utils.h
+++ b/driver/tests/tex_demo/utils.h
@@ -3,6 +3,12 @@
 #include <iostream>
 #include "blitter.h"

+#define ISPOW2(x)   (((x) != 0) && (0 == ((x) & ((x) - 1))))
+
+inline uint32_t ilog2 (uint32_t value) {
+  	return (uint32_t)(sizeof(uint32_t) * 8UL) - (uint32_t)__builtin_clzl((value << 1) - 1UL) - 1;
+}
+
 int LoadTGA(const char *filename, 
            std::vector<uint8_t> &pixels, 
            uint32_t *width,