1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/**
* @file z_viscvg.c
*
* This file implements full-screen frame buffer effects involving the visualization of Coverage in various ways.
*
* Coverage is roughly how much of a pixel is covered by a primitive; the final coverage for a frame is stored in the
* color image alpha component where it is used for antialiasing, see PreRender.c and §15 of the programming manual for
* details.
*
* To understand this file, it is helpful to remember that A_MEM is essentially synonymous with coverage, and that
* `GBL_c1/2(p, a, m, b)` usually represents the RDP blender calculation `(p * a + m * b)`.
* Note the division step that is often included in the blender calculation is omitted; the division is skipped if
* force blending (FORCE_BL) is set, which is the case for all render modes used in this file.
*
* Coverage is full when not on an edge, while on an edge it is usually lower. Since coverage is treated as an alpha
* value, edges of primitives where coverage is lower will show up darker than primitive interiors in all of the
* available modes.
*
* Coverage is abbreviated to "cvg"; "FB RGB" ("framebuffer red/green/blue") is the color the pixel originally had
* before the filter is applied.
*/
#include "global.h"
/**
* Draws only coverage: does not retain any of the original pixel RGB, primColor is used as background color.
*/
Gfx sCoverageOnlyDL[] = {
gsDPSetOtherMode(G_AD_PATTERN | G_CD_MAGICSQ | G_CK_NONE | G_TC_CONV | G_TF_POINT | G_TT_NONE | G_TL_TILE |
G_TD_CLAMP | G_TP_NONE | G_CYC_1CYCLE | G_PM_NPRIMITIVE,
G_AC_NONE | G_ZS_PRIM | G_RM_VISCVG | G_RM_VISCVG2),
// (blendColor RGB) * (cvg)
gsDPFillRectangle(0, 0, SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1),
gsDPPipeSync(),
gsDPSetBlendColor(0, 0, 0, 8),
gsSPEndDisplayList(),
};
/**
* Draws fog + coverage * RGB of pixels
*
* @bug This easily overflows the blender because the fog value is added to the coverage value.
*/
Gfx sCoverageRGBFogDL[] = {
gsDPSetOtherMode(G_AD_PATTERN | G_CD_MAGICSQ | G_CK_NONE | G_TC_CONV | G_TF_POINT | G_TT_NONE | G_TL_TILE |
G_TD_CLAMP | G_TP_NONE | G_CYC_1CYCLE | G_PM_NPRIMITIVE,
G_AC_NONE | G_ZS_PRIM | IM_RD | CVG_DST_CLAMP | ZMODE_OPA | FORCE_BL |
GBL_c1(G_BL_CLR_FOG, G_BL_A_FOG, G_BL_CLR_MEM, G_BL_A_MEM) |
GBL_c2(G_BL_CLR_FOG, G_BL_A_FOG, G_BL_CLR_MEM, G_BL_A_MEM)),
// (fog RGB) * (fog alpha) + (FB RGB) * (cvg)
gsDPFillRectangle(0, 0, SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1),
gsSPEndDisplayList(),
};
/**
* Draws coverage and RGB of pixels
*/
Gfx sCoverageRGBDL[] = {
gsDPSetOtherMode(G_AD_PATTERN | G_CD_MAGICSQ | G_CK_NONE | G_TC_CONV | G_TF_POINT | G_TT_NONE | G_TL_TILE |
G_TD_CLAMP | G_TP_NONE | G_CYC_1CYCLE | G_PM_NPRIMITIVE,
G_AC_NONE | G_ZS_PRIM | IM_RD | CVG_DST_CLAMP | ZMODE_OPA | FORCE_BL |
GBL_c1(G_BL_CLR_IN, G_BL_0, G_BL_CLR_MEM, G_BL_A_MEM) |
GBL_c2(G_BL_CLR_IN, G_BL_0, G_BL_CLR_MEM, G_BL_A_MEM)),
// (FB RGB) * (cvg)
gsDPFillRectangle(0, 0, SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1),
gsSPEndDisplayList(),
};
/**
* Two stage filtering:
*
* 1. Apply a uniform color filter by transparently blending primColor with original frame. The "cloud surface"
* RenderMode is used to preserve the coverage for the second stage.
* 2. Second half is the same as `sCoverageRGBDL`'s, i.e. (RGB from stage 1) * cvg
*/
Gfx sCoverageRGBUniformDL[] = {
gsDPSetCombineMode(G_CC_PRIMITIVE, G_CC_PRIMITIVE),
gsDPSetOtherMode(G_AD_NOTPATTERN | G_CD_DISABLE | G_CK_NONE | G_TC_CONV | G_TF_POINT | G_TT_NONE | G_TL_TILE |
G_TD_CLAMP | G_TP_NONE | G_CYC_1CYCLE | G_PM_NPRIMITIVE,
G_AC_NONE | G_ZS_PRIM | G_RM_CLD_SURF | G_RM_CLD_SURF2),
// stage 1 color = (primColor RGB) * (primColor Alpha) + (FB RGB) * (1 - primColor Alpha)
gsDPFillRectangle(0, 0, SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1),
gsDPSetOtherMode(G_AD_PATTERN | G_CD_MAGICSQ | G_CK_NONE | G_TC_CONV | G_TF_POINT | G_TT_NONE | G_TL_TILE |
G_TD_CLAMP | G_TP_NONE | G_CYC_1CYCLE | G_PM_NPRIMITIVE,
G_AC_NONE | G_ZS_PRIM | IM_RD | CVG_DST_CLAMP | ZMODE_OPA | FORCE_BL |
GBL_c1(G_BL_CLR_IN, G_BL_0, G_BL_CLR_MEM, G_BL_A_MEM) |
GBL_c2(G_BL_CLR_IN, G_BL_0, G_BL_CLR_MEM, G_BL_A_MEM)),
// final color = (stage 1 RGB) * (cvg)
gsDPFillRectangle(0, 0, SCREEN_WIDTH - 1, SCREEN_HEIGHT - 1),
gsSPEndDisplayList(),
};
void VisCvg_Init(VisCvg* this) {
this->vis.type = FB_FILTER_NONE;
this->vis.scissorType = VIS_NO_SETSCISSOR;
this->vis.primColor.r = 255;
this->vis.primColor.g = 255;
this->vis.primColor.b = 255;
this->vis.primColor.a = 255;
}
void VisCvg_Destroy(VisCvg* this) {
}
void VisCvg_Draw(VisCvg* this, Gfx** gfxP) {
Gfx* gfx = *gfxP;
gDPPipeSync(gfx++);
gDPSetPrimDepth(gfx++, 0xFFFF, 0xFFFF);
if (this->vis.scissorType == VIS_SETSCISSOR) {
gDPSetScissor(gfx++, G_SC_NON_INTERLACE, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
}
switch (this->vis.type) {
case FB_FILTER_CVG_RGB:
gSPDisplayList(gfx++, sCoverageRGBDL);
break;
case FB_FILTER_CVG_RGB_UNIFORM:
// Set primitive color for uniform color filter in custom RenderMode
gDPSetColor(gfx++, G_SETPRIMCOLOR, this->vis.primColor.rgba);
gSPDisplayList(gfx++, sCoverageRGBUniformDL);
break;
case FB_FILTER_CVG_ONLY:
// Set background color for G_RM_VISCVG
gDPSetColor(gfx++, G_SETBLENDCOLOR, this->vis.primColor.rgba);
gSPDisplayList(gfx++, sCoverageOnlyDL);
break;
case FB_FILTER_CVG_RGB_FOG:
// Set fog color for custom RenderMode, needs to be close to 0 to not overflow
gDPSetColor(gfx++, G_SETFOGCOLOR, this->vis.primColor.rgba);
gSPDisplayList(gfx++, sCoverageRGBFogDL);
break;
default:
break;
}
gDPPipeSync(gfx++);
*gfxP = gfx;
}
|
