diff options
Diffstat (limited to 'src/dense/ftdense.c')
| -rw-r--r-- | src/dense/ftdense.c | 51 |
1 files changed, 31 insertions, 20 deletions
diff --git a/src/dense/ftdense.c b/src/dense/ftdense.c index 0cf5f2793..18c42e6fd 100644 --- a/src/dense/ftdense.c +++ b/src/dense/ftdense.c @@ -1,5 +1,6 @@ /** The rasterizer for the 'dense' renderer */ +#include <stdio.h> #undef FT_COMPONENT #define FT_COMPONENT dense @@ -12,22 +13,25 @@ #include <math.h> #include "ftdenseerrs.h" +/* @QUES: Please explain all these defines. Why is PIXEL_BITS 8??*/ #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; } dense_TRaster, *dense_PRaster; + static RasterFP_Point Lerp( float aT, RasterFP_Point aP0, RasterFP_Point aP1 ) { @@ -63,11 +67,10 @@ dense_line_to( const FT_Vector* to, RasterFP* aRasterFP ) void RasterFP_DrawLine( RasterFP* aRasterFP, RasterFP_Point aP0, RasterFP_Point aP1 ) { - // printf( "\n%f\n", aRasterFP->m_w ); - // printf( "\n%f\n", aRasterFP->m_h ); - // assert( aRasterFP ); if ( aP0.m_y == aP1.m_y ) return; + + /* @QUES: What is this code that I commented out, supposed to do?*/ // aP0.m_x -= aRasterFP->m_origin_x; // aP0.m_y -= aRasterFP->m_origin_y; // aP1.m_x -= aRasterFP->m_origin_x; @@ -78,9 +81,6 @@ RasterFP_DrawLine( RasterFP* aRasterFP, RasterFP_Point aP0, RasterFP_Point aP1 ) 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 ) dir = 1; @@ -113,6 +113,11 @@ RasterFP_DrawLine( RasterFP* aRasterFP, RasterFP_Point aP0, RasterFP_Point aP1 ) snapping them to the left or right edge, or, if they intersect the clip area, by recursive calls. */ + + /* @QUES: This code isn't present in font-rs. It was added later by graham asher + I have a very strong feeling that this isn't necessary. + Since probably the outline is already fitted in the bounding box. I tested + this code a little, removing it doesn't seem to make any difference*/ RasterFP_Point intersect = { 0, 0 }; int recursive = 0; if ( aP0.m_x >= aRasterFP->m_w && aP1.m_x >= aRasterFP->m_w ) @@ -139,7 +144,6 @@ RasterFP_DrawLine( RasterFP* aRasterFP, RasterFP_Point aP0, RasterFP_Point aP1 ) } if ( recursive ) { - printf("Recursive shit\n"); aP0.m_x += aRasterFP->m_origin_x; aP0.m_y += aRasterFP->m_origin_y; aP1.m_x += aRasterFP->m_origin_x; @@ -159,17 +163,13 @@ RasterFP_DrawLine( RasterFP* aRasterFP, RasterFP_Point aP0, RasterFP_Point aP1 ) return; } + /* @QUES: I am still trying to understand this code */ float x = aP0.m_x; int y0 = (int)aP0.m_y; int y_limit = (int)ceil( aP1.m_y ); float* m_a = aRasterFP->m_a; - // printf( "%f\n", x ); - // 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; @@ -354,6 +354,8 @@ RasterFP_DrawCubic( RasterFP* aRasterFP, RasterFP_DrawLine( aRasterFP, p, aP3 ); } +/* @QUES: This is the first method called on the module. I suspect +this only initializes the memory for it*/ static int dense_raster_new( FT_Memory memory, dense_PRaster* araster ) { @@ -364,12 +366,16 @@ dense_raster_new( FT_Memory memory, dense_PRaster* araster ) raster->memory = memory; *araster = raster; + printf("dense_raster_new\n"); return error; } +/* @QUES: This is a simple method, only frees memory*/ static void dense_raster_done( FT_Raster raster ) { + printf( "dense_raster_done\n" ); + FT_Memory memory = (FT_Memory)( (dense_PRaster)raster )->memory; FT_FREE( raster ); @@ -383,8 +389,10 @@ dense_raster_reset( FT_Raster raster, FT_UNUSED( raster ); FT_UNUSED( pool_base ); FT_UNUSED( pool_size ); + printf("dense_raster_reset\n"); } +/* @QUES: This methodisnt't called in normal ftlint execution*/ static int dense_raster_set_mode( FT_Raster raster, unsigned long mode, void* args ) { @@ -392,6 +400,7 @@ dense_raster_set_mode( FT_Raster raster, unsigned long mode, void* args ) FT_UNUSED( mode ); FT_UNUSED( args ); + printf("dense_raster_set_mode\n"); return 0; /* nothing to do */ } @@ -406,6 +415,9 @@ FT_DEFINE_OUTLINE_FUNCS( dense_decompose_funcs, 0 /* delta */ ) +/* @QUES: So, this calls FT_Outline_Decompose, that calls the move to, +line to, conic to, cubic to interface methods. The aRasterFP structure stores the +well, stuff in its m_a and finally renders it to the target->buffer*/ static int dense_render_glyph( RasterFP* aRasterFP, const FT_Bitmap* target ) { @@ -415,12 +427,6 @@ dense_render_glyph( RasterFP* aRasterFP, const FT_Bitmap* target ) 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++ ) // { @@ -472,9 +478,13 @@ dense_render_glyph( RasterFP* aRasterFP, const FT_Bitmap* target ) return error; } +/* @QUES: The main rasterizing method, params.->target->buffer gets the +rendered pixels*/ static int dense_raster_render( FT_Raster raster, const FT_Raster_Params* params ) { + printf( "dense_raster_render\n" ); + const FT_Outline* outline = (const FT_Outline*)params->source; const FT_Bitmap* target_map = params->target; @@ -500,6 +510,7 @@ dense_raster_render( FT_Raster raster, const FT_Raster_Params* params ) aRasterFP->m_origin_x = 0; aRasterFP->m_origin_y = 0; + /* @QUES: Why are my bitmaps upsied down ðŸ˜*/ aRasterFP->m_w = target_map->pitch; aRasterFP->m_h = target_map->rows; |