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small speedup of the drawing routine (68 byte code size increase)

This commit is contained in:
Christian Kroll 2012-02-18 00:15:32 +00:00
parent 05bc860b25
commit 484817740d
1 changed files with 18 additions and 13 deletions
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31
animations/fpmath_patterns.c
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@ -1,5 +1,6 @@
#include <math.h> // Floating point math is dog slow on AVR, but I don't care. #include <math.h> // Floating point math is dog slow on AVR, but I don't care.
#include <string.h> #include <string.h>
#include <assert.h>
#include "../config.h" #include "../config.h"
#include "../pixel.h" #include "../pixel.h"
#include "../util.h" #include "../util.h"
@ -58,31 +59,29 @@ static void fpmath_pattern(double const t_start,
// double buffering to reduce half painted pictures // double buffering to reduce half painted pictures
unsigned char pixmap_buffer[NUMPLANE][NUM_ROWS][LINEBYTES]; unsigned char pixmap_buffer[NUMPLANE][NUM_ROWS][LINEBYTES];
#endif #endif
for (double t = t_start; t < t_stop; t += t_delta) for (double t = t_start; t < t_stop; t += t_delta)
{ {
for (unsigned char y = 0; y < NUM_ROWS; ++y) for (unsigned char y = 0; y < NUM_ROWS; ++y)
{ {
for (unsigned char x = 0; x < NUM_COLS; ++x) unsigned char nChunk[NUMPLANE + 1][LINEBYTES] = {{0}};
for (unsigned char x = 0; x < (LINEBYTES * 8); ++x)
{ {
unsigned char const mask = shl_table[x % 8U]; nChunk[fpPattern(x, y, t) - 1][x / 8u] |= shl_table[x % 8u];
unsigned char const x_8 = x / 8u; }
unsigned char const color = fpPattern(x, y, t); for (unsigned char p = NUMPLANE; p--;)
for (unsigned char p = 0; p < NUMPLANE; ++p) {
for (unsigned char col = LINEBYTES; col--;)
{ {
if (p <= (color - 1)) BUFFER[p][y][col] = nChunk[p][col] | nChunk[p + 1][col];
{
BUFFER[p][y][x_8] |= mask;
}
else
{
BUFFER[p][y][x_8] &= ~mask;
}
} }
} }
} }
#ifdef DOUBLE_BUFFERING #ifdef DOUBLE_BUFFERING
memcpy(pixmap, pixmap_buffer, sizeof(pixmap)); memcpy(pixmap, pixmap_buffer, sizeof(pixmap));
#endif #endif
wait(frame_delay); wait(frame_delay);
} }
} }
@ -96,6 +95,9 @@ static void fpmath_pattern(double const t_start,
*/ */
static unsigned char fpmath_plasma(unsigned char x, unsigned char y, double t) static unsigned char fpmath_plasma(unsigned char x, unsigned char y, double t)
{ {
assert(x < NUM_COLS);
assert(y < NUM_ROWS);
static double fFunc1[NUM_COLS]; static double fFunc1[NUM_COLS];
static double fFunc2CosArg; static double fFunc2CosArg;
static double fFunc2SinArg; static double fFunc2SinArg;
@ -130,6 +132,9 @@ void plasma(void)
*/ */
static unsigned char fpmath_psycho(unsigned char x, unsigned char y, double t) static unsigned char fpmath_psycho(unsigned char x, unsigned char y, double t)
{ {
assert(x < NUM_COLS);
assert(y < NUM_ROWS);
static double fCosinus; static double fCosinus;
static double fSinus; static double fSinus;
static double t10; static double t10;