Commit b7627952 authored by Gerd Hoffmann's avatar Gerd Hoffmann
Browse files

pixman: render vgafont glyphs into pixman images 



Add helper functions to create pixman mask images for glyphs
and to render these glyphs into a pixman image.

Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
parent 867c538f

include/ui/qemu-pixman.h

+7 −0
Original line number Diff line number Diff line
@@ -44,5 +44,12 @@ pixman_image_t *qemu_pixman_mirror_create(pixman_format_code_t format, 
void qemu_pixman_image_unref(pixman_image_t *image);



pixman_color_t qemu_pixman_color(PixelFormat *pf, uint32_t color);

pixman_image_t *qemu_pixman_glyph_from_vgafont(int height, const uint8_t *font,

                                               unsigned int ch);

void qemu_pixman_glyph_render(pixman_image_t *glyph,

                              pixman_image_t *surface,

                              pixman_color_t *fgcol,

                              pixman_color_t *bgcol,

                              int x, int y, int cw, int ch);



#endif /* QEMU_PIXMAN_H */

ui/qemu-pixman.c

+43 −0
Original line number Diff line number Diff line
@@ -90,3 +90,46 @@ pixman_color_t qemu_pixman_color(PixelFormat *pf, uint32_t color) 
    c.alpha = ((color & pf->amask) >> pf->ashift) << (16 - pf->abits);

    return c;

}



pixman_image_t *qemu_pixman_glyph_from_vgafont(int height, const uint8_t *font,

                                               unsigned int ch)

{

    pixman_image_t *glyph;

    uint8_t *data;

    bool bit;

    int x, y;



    glyph = pixman_image_create_bits(PIXMAN_a8, 8, height,

                                     NULL, 0);

    data = (uint8_t *)pixman_image_get_data(glyph);



    font += height * ch;

    for (y = 0; y < height; y++, font++) {

        for (x = 0; x < 8; x++, data++) {

            bit = (*font) & (1 << (7-x));

            *data = bit ? 0xff : 0x00;

        }

    }

    return glyph;

}



void qemu_pixman_glyph_render(pixman_image_t *glyph,

                              pixman_image_t *surface,

                              pixman_color_t *fgcol,

                              pixman_color_t *bgcol,

                              int x, int y, int cw, int ch)

{

    pixman_image_t *ifg = pixman_image_create_solid_fill(fgcol);

    pixman_image_t *ibg = pixman_image_create_solid_fill(bgcol);



    pixman_image_composite(PIXMAN_OP_SRC, ibg, NULL, surface,

                           0, 0, 0, 0,

                           cw * x, ch * y,

                           cw, ch);

    pixman_image_composite(PIXMAN_OP_OVER, ifg, glyph, surface,

                           0, 0, 0, 0,

                           cw * x, ch * y,

                           cw, ch);

    pixman_image_unref(ifg);

    pixman_image_unref(ibg);

}