[PATCH v5] gdi32: Support the gamma correction for the subpixel rendering.
Signed-off-by: Byeongsik Jeon <bsjeon(a)hanmail.net> --- v5: Fix the reproduced thread safety problem. dlls/gdi32/dc.c | 1 + dlls/gdi32/dibdrv/dibdrv.h | 8 +++++- dlls/gdi32/dibdrv/graphics.c | 18 +++++++------ dlls/gdi32/dibdrv/primitives.c | 49 +++++++++++++++++++++++++--------- dlls/gdi32/font.c | 43 +++++++++++++++++++++++++++++ dlls/gdi32/gdi_private.h | 10 +++++++ 6 files changed, 108 insertions(+), 21 deletions(-) diff --git a/dlls/gdi32/dc.c b/dlls/gdi32/dc.c index 892d3e9744..8ee8a52d94 100644 --- a/dlls/gdi32/dc.c +++ b/dlls/gdi32/dc.c @@ -168,6 +168,7 @@ static void free_dc_state( DC *dc ) if (dc->hVisRgn) DeleteObject( dc->hVisRgn ); if (dc->region) DeleteObject( dc->region ); if (dc->path) free_gdi_path( dc->path ); + HeapFree( GetProcessHeap(), 0, dc->font_gamma_ramp ); HeapFree( GetProcessHeap(), 0, dc ); } diff --git a/dlls/gdi32/dibdrv/dibdrv.h b/dlls/gdi32/dibdrv/dibdrv.h index f79f5b0867..02164c9692 100644 --- a/dlls/gdi32/dibdrv/dibdrv.h +++ b/dlls/gdi32/dibdrv/dibdrv.h @@ -85,6 +85,12 @@ struct intensity_range BYTE b_min, b_max; }; +struct font_intensities +{ + struct intensity_range ranges[17]; + struct font_gamma_ramp *gamma_ramp; +}; + typedef struct dibdrv_physdev { struct gdi_physdev dev; @@ -192,7 +198,7 @@ typedef struct primitive_funcs void (* draw_glyph)(const dib_info *dst, const RECT *rc, const dib_info *glyph, const POINT *origin, DWORD text_pixel, const struct intensity_range *ranges); void (* draw_subpixel_glyph)(const dib_info *dst, const RECT *rc, const dib_info *glyph, - const POINT *origin, DWORD text_pixel ); + const POINT *origin, DWORD text_pixel, const struct font_gamma_ramp *gamma_ramp); DWORD (* get_pixel)(const dib_info *dib, int x, int y); DWORD (* colorref_to_pixel)(const dib_info *dib, COLORREF color); COLORREF (* pixel_to_colorref)(const dib_info *dib, DWORD pixel); diff --git a/dlls/gdi32/dibdrv/graphics.c b/dlls/gdi32/dibdrv/graphics.c index 08f8c3d6d2..7d71fbb12a 100644 --- a/dlls/gdi32/dibdrv/graphics.c +++ b/dlls/gdi32/dibdrv/graphics.c @@ -683,8 +683,8 @@ static inline void get_text_bkgnd_masks( DC *dc, const dib_info *dib, rop_mask * static void draw_glyph( dib_info *dib, int x, int y, const GLYPHMETRICS *metrics, const dib_info *glyph_dib, DWORD text_color, - const struct intensity_range *ranges, const struct clipped_rects *clipped_rects, - RECT *bounds ) + const struct font_intensities *intensity, + const struct clipped_rects *clipped_rects, RECT *bounds ) { int i; RECT rect, clipped_rect; @@ -705,10 +705,10 @@ static void draw_glyph( dib_info *dib, int x, int y, const GLYPHMETRICS *metrics if (glyph_dib->bit_count == 32) dib->funcs->draw_subpixel_glyph( dib, &clipped_rect, glyph_dib, &src_origin, - text_color ); + text_color, intensity->gamma_ramp ); else dib->funcs->draw_glyph( dib, &clipped_rect, glyph_dib, &src_origin, - text_color, ranges ); + text_color, intensity->ranges ); } } } @@ -816,7 +816,7 @@ static void render_string( DC *dc, dib_info *dib, struct cached_font *font, INT struct cached_glyph *glyph; dib_info glyph_dib; DWORD text_color; - struct intensity_range ranges[17]; + struct font_intensities intensity; glyph_dib.bit_count = get_glyph_depth( font->aa_flags ); glyph_dib.rect.left = 0; @@ -826,8 +826,10 @@ static void render_string( DC *dc, dib_info *dib, struct cached_font *font, INT text_color = get_pixel_color( dc, dib, dc->textColor, TRUE ); - if (glyph_dib.bit_count == 8) - get_aa_ranges( dib->funcs->pixel_to_colorref( dib, text_color ), ranges ); + if (glyph_dib.bit_count == 32) + intensity.gamma_ramp = dc->font_gamma_ramp; + else + get_aa_ranges( dib->funcs->pixel_to_colorref( dib, text_color ), intensity.ranges ); for (i = 0; i < count; i++) { @@ -841,7 +843,7 @@ static void render_string( DC *dc, dib_info *dib, struct cached_font *font, INT glyph_dib.stride = get_dib_stride( glyph->metrics.gmBlackBoxX, glyph_dib.bit_count ); glyph_dib.bits.ptr = glyph->bits; - draw_glyph( dib, x, y, &glyph->metrics, &glyph_dib, text_color, ranges, clipped_rects, bounds ); + draw_glyph( dib, x, y, &glyph->metrics, &glyph_dib, text_color, &intensity, clipped_rects, bounds ); if (dx) { diff --git a/dlls/gdi32/dibdrv/primitives.c b/dlls/gdi32/dibdrv/primitives.c index 0d097b2da6..01a1c7c1d8 100644 --- a/dlls/gdi32/dibdrv/primitives.c +++ b/dlls/gdi32/dibdrv/primitives.c @@ -6272,16 +6272,35 @@ static void draw_glyph_null( const dib_info *dib, const RECT *rect, const dib_in { return; } +static inline BYTE blend_color_gamma( BYTE dst, BYTE text, BYTE alpha, + const struct font_gamma_ramp *gamma_ramp ) +{ + if (alpha == 0) return dst; + if (alpha == 255) return text; + if (dst == text) return dst; + + return gamma_ramp->encode[ blend_color( gamma_ramp->decode[dst], + gamma_ramp->decode[text], + alpha ) ]; +} -static inline DWORD blend_subpixel( BYTE r, BYTE g, BYTE b, DWORD text, DWORD alpha ) +static inline DWORD blend_subpixel( BYTE r, BYTE g, BYTE b, DWORD text, DWORD alpha, + const struct font_gamma_ramp *gamma_ramp ) { + if (gamma_ramp != NULL && gamma_ramp->gamma != 1000) + { + return blend_color_gamma( r, text >> 16, (BYTE)(alpha >> 16), gamma_ramp ) << 16 | + blend_color_gamma( g, text >> 8, (BYTE)(alpha >> 8), gamma_ramp ) << 8 | + blend_color_gamma( b, text, (BYTE) alpha, gamma_ramp ); + } return blend_color( r, text >> 16, (BYTE)(alpha >> 16) ) << 16 | blend_color( g, text >> 8, (BYTE)(alpha >> 8) ) << 8 | blend_color( b, text, (BYTE) alpha ); } static void draw_subpixel_glyph_8888( const dib_info *dib, const RECT *rect, const dib_info *glyph, - const POINT *origin, DWORD text_pixel ) + const POINT *origin, DWORD text_pixel, + const struct font_gamma_ramp *gamma_ramp ) { DWORD *dst_ptr = get_pixel_ptr_32( dib, rect->left, rect->top ); const DWORD *glyph_ptr = get_pixel_ptr_32( glyph, origin->x, origin->y ); @@ -6292,7 +6311,8 @@ static void draw_subpixel_glyph_8888( const dib_info *dib, const RECT *rect, con for (x = 0; x < rect->right - rect->left; x++) { if (glyph_ptr[x] == 0) continue; - dst_ptr[x] = blend_subpixel( dst_ptr[x] >> 16, dst_ptr[x] >> 8, dst_ptr[x], text_pixel, glyph_ptr[x] ); + dst_ptr[x] = blend_subpixel( dst_ptr[x] >> 16, dst_ptr[x] >> 8, dst_ptr[x], + text_pixel, glyph_ptr[x], gamma_ramp ); } dst_ptr += dib->stride / 4; glyph_ptr += glyph->stride / 4; @@ -6300,7 +6320,8 @@ static void draw_subpixel_glyph_8888( const dib_info *dib, const RECT *rect, con } static void draw_subpixel_glyph_32( const dib_info *dib, const RECT *rect, const dib_info *glyph, - const POINT *origin, DWORD text_pixel ) + const POINT *origin, DWORD text_pixel, + const struct font_gamma_ramp *gamma_ramp ) { DWORD *dst_ptr = get_pixel_ptr_32( dib, rect->left, rect->top ); const DWORD *glyph_ptr = get_pixel_ptr_32( glyph, origin->x, origin->y ); @@ -6319,7 +6340,7 @@ static void draw_subpixel_glyph_32( const dib_info *dib, const RECT *rect, const val = blend_subpixel( get_field(dst_ptr[x], dib->red_shift, dib->red_len), get_field(dst_ptr[x], dib->green_shift, dib->green_len), get_field(dst_ptr[x], dib->blue_shift, dib->blue_len), - text, glyph_ptr[x] ); + text, glyph_ptr[x], gamma_ramp ); dst_ptr[x] = rgb_to_pixel_masks( dib, val >> 16, val >> 8, val ); } dst_ptr += dib->stride / 4; @@ -6328,7 +6349,8 @@ static void draw_subpixel_glyph_32( const dib_info *dib, const RECT *rect, const } static void draw_subpixel_glyph_24( const dib_info *dib, const RECT *rect, const dib_info *glyph, - const POINT *origin, DWORD text_pixel ) + const POINT *origin, DWORD text_pixel, + const struct font_gamma_ramp *gamma_ramp ) { BYTE *dst_ptr = get_pixel_ptr_24( dib, rect->left, rect->top ); const DWORD *glyph_ptr = get_pixel_ptr_32( glyph, origin->x, origin->y ); @@ -6341,7 +6363,7 @@ static void draw_subpixel_glyph_24( const dib_info *dib, const RECT *rect, const { if (glyph_ptr[x] == 0) continue; val = blend_subpixel( dst_ptr[x * 3 + 2], dst_ptr[x * 3 + 1], dst_ptr[x * 3], - text_pixel, glyph_ptr[x] ); + text_pixel, glyph_ptr[x], gamma_ramp ); dst_ptr[x * 3] = val; dst_ptr[x * 3 + 1] = val >> 8; dst_ptr[x * 3 + 2] = val >> 16; @@ -6352,7 +6374,8 @@ static void draw_subpixel_glyph_24( const dib_info *dib, const RECT *rect, const } static void draw_subpixel_glyph_555( const dib_info *dib, const RECT *rect, const dib_info *glyph, - const POINT *origin, DWORD text_pixel ) + const POINT *origin, DWORD text_pixel, + const struct font_gamma_ramp *gamma_ramp ) { WORD *dst_ptr = get_pixel_ptr_16( dib, rect->left, rect->top ); const DWORD *glyph_ptr = get_pixel_ptr_32( glyph, origin->x, origin->y ); @@ -6371,7 +6394,7 @@ static void draw_subpixel_glyph_555( const dib_info *dib, const RECT *rect, cons val = blend_subpixel( ((dst_ptr[x] >> 7) & 0xf8) | ((dst_ptr[x] >> 12) & 0x07), ((dst_ptr[x] >> 2) & 0xf8) | ((dst_ptr[x] >> 7) & 0x07), ((dst_ptr[x] << 3) & 0xf8) | ((dst_ptr[x] >> 2) & 0x07), - text, glyph_ptr[x] ); + text, glyph_ptr[x], NULL ); dst_ptr[x] = ((val >> 9) & 0x7c00) | ((val >> 6) & 0x03e0) | ((val >> 3) & 0x001f); } dst_ptr += dib->stride / 2; @@ -6380,7 +6403,8 @@ static void draw_subpixel_glyph_555( const dib_info *dib, const RECT *rect, cons } static void draw_subpixel_glyph_16( const dib_info *dib, const RECT *rect, const dib_info *glyph, - const POINT *origin, DWORD text_pixel ) + const POINT *origin, DWORD text_pixel, + const struct font_gamma_ramp *gamma_ramp ) { WORD *dst_ptr = get_pixel_ptr_16( dib, rect->left, rect->top ); const DWORD *glyph_ptr = get_pixel_ptr_32( glyph, origin->x, origin->y ); @@ -6399,7 +6423,7 @@ static void draw_subpixel_glyph_16( const dib_info *dib, const RECT *rect, const val = blend_subpixel( get_field(dst_ptr[x], dib->red_shift, dib->red_len), get_field(dst_ptr[x], dib->green_shift, dib->green_len), get_field(dst_ptr[x], dib->blue_shift, dib->blue_len), - text, glyph_ptr[x] ); + text, glyph_ptr[x], NULL ); dst_ptr[x] = rgb_to_pixel_masks( dib, val >> 16, val >> 8, val ); } dst_ptr += dib->stride / 2; @@ -6408,7 +6432,8 @@ static void draw_subpixel_glyph_16( const dib_info *dib, const RECT *rect, const } static void draw_subpixel_glyph_null( const dib_info *dib, const RECT *rect, const dib_info *glyph, - const POINT *origin, DWORD text_pixel ) + const POINT *origin, DWORD text_pixel, + const struct font_gamma_ramp *gamma_ramp ) { return; } diff --git a/dlls/gdi32/font.c b/dlls/gdi32/font.c index 5c67d5b518..59cb73bd9f 100644 --- a/dlls/gdi32/font.c +++ b/dlls/gdi32/font.c @@ -729,6 +729,47 @@ static void update_font_code_page( DC *dc, HANDLE font ) TRACE("charset %d => cp %d\n", charset, dc->font_code_page); } +static struct font_gamma_ramp *get_font_gamma_ramp( void ) +{ + static const WCHAR desktopW[] = { 'C','o','n','t','r','o','l',' ','P','a','n','e','l','\\', + 'D','e','s','k','t','o','p',0 }; + static const WCHAR smoothing_gamma[] = { 'F','o','n','t','S','m','o','o','t','h','i','n','g', + 'G','a','m','m','a',0 }; + const DWORD gamma_default = 1400; + struct font_gamma_ramp *ramp; + DWORD i, gamma; + HKEY key; + + ramp = HeapAlloc( GetProcessHeap(), 0, sizeof(*ramp) ); + if ( ramp == NULL) return NULL; + + gamma = gamma_default; + if (RegOpenKeyW( HKEY_CURRENT_USER, desktopW, &key ) == ERROR_SUCCESS) + { + if (get_key_value( key, smoothing_gamma, &gamma ) || gamma == 0) + gamma = gamma_default; + RegCloseKey( key ); + + gamma = min( max( gamma, 1000 ), 2200 ); + } + + /* Calibration the difference between the registry value and the Wine gamma value. + This shows a roughly similar looks to the Windows Native with the same registry value. + MS GDI seems to be rasterizing the outline at the different rate than FreeType. */ + gamma = 1000 * gamma / 1400; + + for (i = 0; i < 256; i++) + { + ramp->encode[i] = pow( i / 255., 1000. / gamma ) * 255. + .5; + ramp->decode[i] = pow( i / 255., gamma / 1000. ) * 255. + .5; + } + + ramp->gamma = gamma; + TRACE("gamma %d\n", ramp->gamma); + + return ramp; +} + /*********************************************************************** * FONT_SelectObject */ @@ -754,6 +795,8 @@ static HGDIOBJ FONT_SelectObject( HGDIOBJ handle, HDC hdc ) dc->hFont = handle; dc->aa_flags = aa_flags ? aa_flags : GGO_BITMAP; update_font_code_page( dc, handle ); + if (dc->font_gamma_ramp == NULL) + dc->font_gamma_ramp = get_font_gamma_ramp(); GDI_dec_ref_count( ret ); } else GDI_dec_ref_count( handle ); diff --git a/dlls/gdi32/gdi_private.h b/dlls/gdi32/gdi_private.h index 5b09b84846..920cd1e7bf 100644 --- a/dlls/gdi32/gdi_private.h +++ b/dlls/gdi32/gdi_private.h @@ -99,6 +99,8 @@ typedef struct tagDC struct gdi_path *path; + struct font_gamma_ramp *font_gamma_ramp; + UINT font_code_page; WORD ROPmode; WORD polyFillMode; @@ -270,6 +272,14 @@ extern BOOL DRIVER_GetDriverName( LPCWSTR device, LPWSTR driver, DWORD size ) DE /* enhmetafile.c */ extern HENHMETAFILE EMF_Create_HENHMETAFILE(ENHMETAHEADER *emh, DWORD filesize, BOOL on_disk ) DECLSPEC_HIDDEN; +/* font.c */ +struct font_gamma_ramp +{ + DWORD gamma; + BYTE encode[256]; + BYTE decode[256]; +}; + /* freetype.c */ /* Undocumented structure filled in by GetFontRealizationInfo */ -- 2.19.1
participants (2)
-
Byeongsik Jeon -
Huw Davies