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textri command

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added to js & lua
supports use_map ( i.e. render like a map )
supports chroma ( i.e. ignore color )
This commit is contained in:
jett@monstersgoboom.com
2017-09-28 09:15:04 -04:00
parent ad60ea32e0
commit 4ac252adaa
5 changed files with 187 additions and 2 deletions
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124
src/tic.c
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@@ -711,6 +711,10 @@ static struct
{
s16 Left[TIC80_HEIGHT];
s16 Right[TIC80_HEIGHT];
float ULeft[TIC80_HEIGHT];
float VLeft[TIC80_HEIGHT];
float URight[TIC80_HEIGHT];
float VRight[TIC80_HEIGHT];
} SidesBuffer;
static void initSidesBuffer()
@@ -728,6 +732,26 @@ static void setSidePixel(s32 x, s32 y)
}
}
static void setSideTexPixel(s32 x, s32 y, float u, float v)
{
int yy = (int)y;
if (yy >= 0 && yy < TIC80_HEIGHT)
{
if (x < SidesBuffer.Left[yy])
{
SidesBuffer.Left[yy] = x;
SidesBuffer.ULeft[yy] = u;
SidesBuffer.VLeft[yy] = v;
}
if (x > SidesBuffer.Right[yy])
{
SidesBuffer.Right[yy] = x;
SidesBuffer.URight[yy] = u;
SidesBuffer.VRight[yy] = v;
}
}
}
static void api_circle(tic_mem* memory, s32 xm, s32 ym, u32 radius, u8 color)
{
tic_machine* machine = (tic_machine*)memory;
@@ -805,6 +829,105 @@ static void api_tri(tic_mem* memory, s32 x1, s32 y1, s32 x2, s32 y2, s32 x3, s32
setPixel(machine, x, y, color);
}
typedef struct
{
float x, y, u, v;
} TexVert;
static void ticTexLine(tic_mem* memory, TexVert *v0, TexVert *v1)
{
int iy;
TexVert *top = v0;
TexVert *bot = v1;
if (bot->y < top->y)
{
top = v1;
bot = v0;
}
float dy = bot->y - top->y;
if ((int)dy == 0) return;
float step_x = (bot->x - top->x) / dy;
float step_u = (bot->u - top->u) / dy;
float step_v = (bot->v - top->v) / dy;
float x = top->x;
float y = top->y;
float u = top->u;
float v = top->v;
for (; y < (int)bot->y; y++)
{
setSideTexPixel(x, y, u, v);
x += step_x;
u += step_u;
v += step_v;
}
}
static void api_textri(tic_mem* memory, s32 x1, s32 y1, s32 x2, s32 y2, s32 x3, s32 y3, s32 u1, s32 v1, s32 u2, s32 v2, s32 u3, s32 v3,bool use_map,u8 chroma)
{
tic_machine* machine = (tic_machine*)memory;
TexVert V0, V1, V2;
const u8* ptr = memory->ram.gfx.tiles[0].data;
const u8* map = memory->ram.gfx.map.data;
V0.x = (float)x1; V0.y = (float)y1; V0.u = (float)u1; V0.v = (float)v1;
V1.x = (float)x2; V1.y = (float)y2; V1.u = (float)u2; V1.v = (float)v2;
V2.x = (float)x3; V2.y = (float)y3; V2.u = (float)u3; V2.v = (float)v3;
initSidesBuffer();
ticTexLine(memory, &V0, &V1);
ticTexLine(memory, &V1, &V2);
ticTexLine(memory, &V2, &V0);
{
for (s32 y = 0; y < TIC80_HEIGHT; y++)
{
float width = SidesBuffer.Right[y] - SidesBuffer.Left[y];
if (width > 0)
{
float du = (SidesBuffer.URight[y] - SidesBuffer.ULeft[y]) / width;
float dv = (SidesBuffer.VRight[y] - SidesBuffer.VLeft[y]) / width;
float u = SidesBuffer.ULeft[y];
float v = SidesBuffer.VLeft[y];
for (s32 x = (int)SidesBuffer.Left[y]; x <= (int)SidesBuffer.Right[y]; ++x)
{
if ((x >= 0) && (x < TIC80_WIDTH))
{
if (use_map == true)
{
int iu = (int)u % 1920;
int iv = (int)v % 1088;
u8 tile = map[(iv>>3) * TIC_MAP_WIDTH + (iu>>3)];
u8 *buffer = &ptr[tile << 5];
u8 color = tic_tool_peek4(buffer, (iu & 7) + ((iv & 7) << 3));
if (color != chroma)
setPixel(machine, x, y, color);
}
else
{
int iu = (int)(u) & 127;
int iv = (int)(v) & 255;
u8 *buffer = &ptr[((iu >> 3) + ((iv >> 3) << 4)) << 5];
u8 color = tic_tool_peek4(buffer, (iu & 7) + ((iv & 7) << 3));
if (color != chroma)
setPixel(machine, x, y, color);
}
}
u += du;
v += dv;
}
}
}
}
}
static void api_sprite(tic_mem* memory, const tic_gfx* src, s32 index, s32 x, s32 y, u8* colors, s32 count)
{
drawSprite(memory, src, index, x, y, colors, count, 1, tic_no_flip, tic_no_rotate);
@@ -1536,6 +1659,7 @@ static void initApi(tic_api* api)
INIT_API(circle);
INIT_API(circle_border);
INIT_API(tri);
INIT_API(textri);
INIT_API(clip);
INIT_API(sfx);
INIT_API(sfx_stop);