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freetype2
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Integration prototype successful

This commit is contained in:
Anurag Thakur 2021-10-30 14:44:39 +05:30
parent 43a66f774c
commit 44892f8212
7 changed files with 111 additions and 59 deletions
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3
.vscode/settings.json vendored
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@ -1,6 +1,7 @@
{
"files.associations": {
"ftoutln.h": "c",
"svprop.h": "c"
"svprop.h": "c",
"ftdebug.h": "c"
}
}

2
modules.cfg
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@ -97,6 +97,8 @@ RASTER_MODULES += dense
# Anti-aliasing rasterizer.
RASTER_MODULES += smooth
# RASTER_MODULES += dense
# Monochrome rasterizer.
RASTER_MODULES += raster

134
src/dense/ftdense.c
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@ -12,6 +12,16 @@
#include <math.h>
#include "ftdenseerrs.h"
#define PIXEL_BITS 8
#define ONE_PIXEL ( 1 << PIXEL_BITS )
#define TRUNC( x ) ( int )( ( x ) >> PIXEL_BITS )
#define FRACT( x ) ( int )( ( x ) & ( ONE_PIXEL - 1 ) )
#define UPSCALE( x ) ( ( x ) * ( ONE_PIXEL >> 6 ) )
#define DOWNSCALE( x ) ( ( x ) >> ( PIXEL_BITS - 6 ) )
typedef struct dense_TRaster_
{
void* memory;
@ -30,19 +40,23 @@ Lerp( float aT, RasterFP_Point aP0, RasterFP_Point aP1 )
static int
dense_move_to( const FT_Vector* to, RasterFP* aRasterFP )
{
RasterFP_Point lp = { to->x, to->y };
aRasterFP->last_point = lp;
FT_Pos x, y;
x = UPSCALE( to->x );
y = UPSCALE( to->y );
aRasterFP->prev_x = x;
aRasterFP->prev_y = y;
//printf( "last point is {%f, %f}", lp.m_x, lp.m_y );
return 0;
}
static int
dense_line_to( const FT_Vector* to, RasterFP* aRasterFP )
{
RasterFP_Point tp = { to->x, to->y };
RasterFP_DrawLine( aRasterFP, aRasterFP->last_point, tp );
RasterFP_Point tp = {UPSCALE(to->x), UPSCALE(to->y)};
RasterFP_Point lp = {aRasterFP->prev_x, aRasterFP->prev_y};
RasterFP_DrawLine( aRasterFP, lp, tp );
dense_move_to( to, aRasterFP );
return 0;
}
@ -54,11 +68,18 @@ RasterFP_DrawLine( RasterFP* aRasterFP, RasterFP_Point aP0, RasterFP_Point aP1 )
// assert( aRasterFP );
if ( aP0.m_y == aP1.m_y )
return;
// aP0.m_x -= aRasterFP->m_origin_x;
// aP0.m_y -= aRasterFP->m_origin_y;
// aP1.m_x -= aRasterFP->m_origin_x;
// aP1.m_y -= aRasterFP->m_origin_y;
aP0.m_x -= aRasterFP->m_origin_x;
aP0.m_y -= aRasterFP->m_origin_y;
aP1.m_x -= aRasterFP->m_origin_x;
aP1.m_y -= aRasterFP->m_origin_y;
aP0.m_x = TRUNC((int)aP0.m_x );
aP0.m_y = TRUNC((int)aP0.m_y );
aP1.m_x = TRUNC((int)aP1.m_x );
aP1.m_y = TRUNC((int)aP1.m_y );
// printf( "Drawing a line from {%f, %f} to {%f, %f}\n", aP0.m_x, aP0.m_y,
// aP1.m_x, aP1.m_y );
float dir;
if ( aP0.m_y < aP1.m_y )
@ -146,8 +167,8 @@ RasterFP_DrawLine( RasterFP* aRasterFP, RasterFP_Point aP0, RasterFP_Point aP1 )
// printf( "%d\n", y0 );
// printf( "%d\n", y_limit );
// printf( "%p\n", m_a );
// printf( "Drawing line from {%f, %f} to {%f, %f}\n", aP0.m_x, aP0.m_y, aP1.m_x,
// aP1.m_y );
for ( int y = y0; y < y_limit; y++ )
{
int linestart = y * aRasterFP->m_w;
@ -206,22 +227,17 @@ RasterFP_DrawLine( RasterFP* aRasterFP, RasterFP_Point aP0, RasterFP_Point aP1 )
}
x = xnext;
}
}
static int
dense_conic_to( const FT_Vector* control,
const FT_Vector* to,
RasterFP* aRasterFP )
{
RasterFP_Point controlP = { control->x, control->y };
RasterFP_Point toP = { to->x, to->y };
RasterFP_DrawQuadratic( aRasterFP, aRasterFP->last_point, controlP, toP );
RasterFP_Point controlP = { UPSCALE(control->x), UPSCALE(control->y) };
RasterFP_Point toP = { UPSCALE(to->x), UPSCALE(to->y) };
RasterFP_Point lP = { aRasterFP->prev_x, aRasterFP->prev_y };
RasterFP_DrawQuadratic( aRasterFP, lP, controlP, toP );
return 0;
}
@ -280,23 +296,19 @@ RasterFP_DrawQuadratic( RasterFP* aRasterFP,
RasterFP_DrawLine( aRasterFP, p, aP2 );
}
static int
dense_cubic_to( const FT_Vector* control1,
const FT_Vector* control2,
const FT_Vector* to,
RasterFP* aRasterFP )
{
RasterFP_Point ap1 = { control1->x, control1->y };
RasterFP_Point ap2 = { control2->x, control2->y };
RasterFP_Point ap3 = { to->x, to->y };
RasterFP_Point ap1 = { UPSCALE(control1->x), UPSCALE(control1->y) };
RasterFP_Point ap2 = { UPSCALE(control2->x), UPSCALE(control2->y) };
RasterFP_Point ap3 = { UPSCALE(to->x), UPSCALE(to->y) };
RasterFP_DrawCubic( aRasterFP, aRasterFP->last_point, ap1, ap2, ap3 );
RasterFP_Point lP = {aRasterFP->prev_x, aRasterFP->prev_y};
RasterFP_DrawCubic( aRasterFP, lP, ap1, ap2, ap3 );
return 0;
}
@ -396,11 +408,49 @@ FT_DEFINE_OUTLINE_FUNCS( dense_decompose_funcs,
static int
dense_render_glyph( RasterFP* aRasterFP, const FT_Bitmap* target )
{
FT_Error error = FT_Outline_Decompose( &(aRasterFP->outline),
FT_Error error = FT_Outline_Decompose( &( aRasterFP->outline ),
&dense_decompose_funcs, aRasterFP );
// Render into bitmap
const float* source = aRasterFP->m_a;
const float* source = aRasterFP->m_a;
// for (int i = 0; i < aRasterFP->m_h; i++)
// {
// printf("%f\n", *(source+i));
// }
// printf("pulu %d\n", aRasterFP->m_h);
printf( "Outputting bitmap\n" );
for ( int i = 0; i < aRasterFP->m_h; i++ )
{
printf( "\n" );
for ( int j = 0; j < aRasterFP->m_w; j++ )
{
float strength = *( source + ( i * aRasterFP->m_w + j ) );
if ( strength > 0.90 )
{
printf( "@|" );
}
else if ( strength > 0.70 )
{
printf( "#|" );
}
else if ( strength > 0.45 )
{
printf( "+|" );
}
else if ( strength > 0.20 )
{
printf( "*|" );
}
else
{
printf( ".|" );
}
}
}
printf( "\n" );
unsigned char* dest = target->buffer;
unsigned char* dest_end = target->buffer + aRasterFP->m_w * aRasterFP->m_h;
float value = 0.0f;
@ -427,8 +477,6 @@ dense_raster_render( FT_Raster raster, const FT_Raster_Params* params )
const FT_Outline* outline = (const FT_Outline*)params->source;
const FT_Bitmap* target_map = params->target;
printf( "Rasterizing glyph" );
RasterFP* aRasterFP = malloc( sizeof( RasterFP ) );
if ( !raster )
@ -449,7 +497,6 @@ dense_raster_render( FT_Raster raster, const FT_Raster_Params* params )
if ( !target_map->buffer )
return FT_THROW( Invalid_Argument );
aRasterFP->m_origin_x = 0;
aRasterFP->m_origin_y = 0;
aRasterFP->m_w = target_map->pitch;
@ -457,19 +504,16 @@ dense_raster_render( FT_Raster raster, const FT_Raster_Params* params )
int size = aRasterFP->m_w * aRasterFP->m_h + 4;
aRasterFP->m_a = realloc(aRasterFP, sizeof(float) * size);
if ( aRasterFP->m_a == NULL )
{
memset( aRasterFP, 0, sizeof( RasterFP ) );
}
aRasterFP->m_a = malloc( sizeof( float ) * size );
aRasterFP->m_a_size = size;
memset( aRasterFP->m_a, 0, sizeof( float ) * size );
memset( aRasterFP->m_a, 0, ( sizeof( float ) * size ) );
/* exit if nothing to do */
if ( aRasterFP->m_w <= aRasterFP->m_origin_x ||
aRasterFP->m_h <= aRasterFP->m_origin_y )
{
return 0;
}
return dense_render_glyph( aRasterFP, target_map );
}

2
src/dense/ftdense.h
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@ -106,7 +106,7 @@ extern "C"
/** The y origin of the raster. */
int m_origin_y;
RasterFP_Point last_point;
FT_Pos prev_x, prev_y;
FT_Outline outline;
} RasterFP;

22
src/dense/ftdenserend.c
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@ -98,22 +98,22 @@ ft_dense_render( FT_Renderer render,
/* the padding will simply be equal to the `spread' */
// x_shift = 64 * -slot->bitmap_left;
// y_shift = 64 * -slot->bitmap_top;
x_shift = 64 * -slot->bitmap_left;
y_shift = 64 * -slot->bitmap_top;
slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
// y_shift += 64 * (FT_Int)bitmap->rows;
y_shift += 64 * (FT_Int)bitmap->rows;
// if ( origin )
// {
// x_shift += origin->x;
// y_shift += origin->y;
// }
if ( origin )
{
x_shift += origin->x;
y_shift += origin->y;
}
// /* translate outline to render it into the bitmap */
// if ( x_shift || y_shift )
// FT_Outline_Translate( outline, x_shift, y_shift );
/* translate outline to render it into the bitmap */
if ( x_shift || y_shift )
FT_Outline_Translate( outline, x_shift, y_shift );
/* set up parameters */
params.target = bitmap;

5
src/smooth/ftgrays.c
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@ -876,10 +876,13 @@ typedef ptrdiff_t FT_PtrDist;
TCoord fx1, fy1, fx2, fy2;
TCoord ex1, ey1, ex2, ey2;
printf( "Line from {%li, %li} to {%li, %li}, with a maximum dimensions of %d by %d\n", ras.x, ras.y, to_x,
to_y, ras.max_ex, ras.max_ey );
ey1 = TRUNC( ras.y );
ey2 = TRUNC( to_y );
printf("Truncation reduced prev y from %ld to %d\n", ras.y, ey1);
/* perform vertical clipping */
if ( ( ey1 >= ras.max_ey && ey2 >= ras.max_ey ) ||
( ey1 < ras.min_ey && ey2 < ras.min_ey ) )

2
src/smooth/ftsmooth.c
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@ -493,6 +493,8 @@
/* translate outline to render it into the bitmap */
if ( x_shift || y_shift )
FT_Outline_Translate( outline, x_shift, y_shift );
printf( "x_shift is %li\n", x_shift );
printf( "y_shift is %li\n", y_shift );
if ( mode == FT_RENDER_MODE_NORMAL ||
mode == FT_RENDER_MODE_LIGHT )