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Added hue control for the composite mode.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2407
This commit is contained in:
Peter Veenstra 2005-12-05 12:18:12 +00:00
parent 6833d3ada5
commit 35dccef707
1 changed files with 38 additions and 14 deletions
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52
src/hardware/vga_other.cpp
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@ -16,11 +16,15 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: vga_other.cpp,v 1.14 2005-12-05 12:18:12 qbix79 Exp $ */
#include <string.h>
#include <math.h>
#include "dosbox.h"
#include "inout.h"
#include "vga.h"
#include "render.h"
#include "mapper.h"
static void write_crtc_index_other(Bitu port,Bitu val,Bitu iolen) {
vga.other.index=val;
@ -124,7 +128,16 @@ static Bitu read_crtc_data_other(Bitu port,Bitu iolen) {
return (Bitu)-1;
}
static double hue_offset = 0.0;
static Bit8u cga16_val = 0;
static void update_cga16_color(void);
static void cga16_color_select(Bit8u val) {
cga16_val = val;
update_cga16_color();
}
static void update_cga16_color(void) {
// Algorithm provided by NewRisingSun
// His/Her algorithm is more complex and gives better results than the one below
// However that algorithm doesn't fit in our vga pallette.
@ -136,23 +149,20 @@ static void cga16_color_select(Bit8u val) {
// to match an entry that is generated here.
int baseR=0, baseG=0, baseB=0;
double sinhue,coshue;
double sinhue,coshue,hue,basehue = 50.0;
double I,Q,Y,pixelI,pixelQ,R,G,B;
Bitu colorBit1,colorBit2,colorBit3,colorBit4,index;
if (val & 0x01) baseB += 0xa8;
if (val & 0x02) baseG += 0xa8;
if (val & 0x04) baseR += 0xa8;
if (val & 0x08) { baseR += 0x57; baseG += 0x57; baseB += 0x57; }
if (val & 0x20) {
//Hue = 33.0 + hueoffset (0)
sinhue=0.54463904; //sin(hue*PI/180);
coshue=0.83867057; //sin(hue*PI/180);
} else {
//Hue = 55.0 + hueoffset (0)
sinhue=0.81915204; //sin(hue*PI/180);
coshue=0.57357644; //cos(hue*PI/180);
}
if (cga16_val & 0x01) baseB += 0xa8;
if (cga16_val & 0x02) baseG += 0xa8;
if (cga16_val & 0x04) baseR += 0xa8;
if (cga16_val & 0x08) { baseR += 0x57; baseG += 0x57; baseB += 0x57; }
if (cga16_val & 0x20) basehue = 35.0;
hue = (basehue + hue_offset)*0.017453239;
sinhue = sin(hue);
coshue = cos(hue);
for(Bitu i = 0; i < 16;i++) {
for(Bitu j = 0;j < 5;j++) {
index = 0x80|(j << 4)|i; //use upperpart of vga pallette
@ -183,6 +193,18 @@ static void cga16_color_select(Bit8u val) {
}
}
static void IncreaseHue(void) {
hue_offset += 5.0;
update_cga16_color();
LOG_MSG("Hue at %f",hue_offset);
}
static void DecreaseHue(void) {
hue_offset -= 5.0;
update_cga16_color();
LOG_MSG("Hue at %f",hue_offset);
}
static void write_color_select(Bit8u val) {
vga.tandy.color_select=val;
switch (vga.mode) {
@ -397,6 +419,8 @@ void VGA_SetupOther(void) {
if (machine==MCH_CGA) {
IO_RegisterWriteHandler(0x3d8,write_cga,IO_MB);
IO_RegisterWriteHandler(0x3d9,write_cga,IO_MB);
MAPPER_AddHandler(IncreaseHue,MK_f11,MMOD1,"inchue","Inc Hue");
MAPPER_AddHandler(DecreaseHue,MK_f11,0,"dechue","Dec Hue");
}
if (machine==MCH_HERC) {
vga.herc.enable_bits=0;