Subversion Repositories orsoc_graphics_accelerator

/*

Bare metal OpenCores GFX IP driver for Wishbone bus.

Anton Fosselius, Per Lenander 2012

  */

#include "orgfx_bitmap_font.h"

#include "orgfx_plus.h"

#include "orgfx.h"

orgfx_bitmap_font orgfx_make_bitmap_font(orgfx_tileset *glyphs,

                             unsigned int glyphSpacing,

                             unsigned int spaceWidth)

{

    orgfx_bitmap_font font;

    font.glyphs = glyphs;

    font.glyphSpacing = glyphSpacing;

    font.spaceWidth = spaceWidth;

    return font;

}

void orgfx_put_bitmap_text(orgfx_bitmap_font* font, unsigned int x0, unsigned int y0, const wchar_t *str)

{

    orgfx_enable_tex0(1);

    orgfxplus_bind_tex0(font->glyphs->surface);

    unsigned int fontStride = font->glyphSpacing;

    unsigned int x = x0;

    int i = 0;

    while(1)

    {

        // Get the character in the string

        wchar_t c = str[i++];

        // Break if we reach the end of the string

        if(c == 0)

            break;

        // If c is a space, handle it specially

        if(c == ' ')

        {

            x += FIXEDW * font->spaceWidth;

            continue;

        }

        // Find the width of the requested character

        unsigned int charW = font->glyphs->rects[c].x1 - font->glyphs->rects[c].x0;

        // Draw the character

        orgfx_draw_tile(x, y0, font->glyphs, c);

        // Move the x-pointer to the next character position

        x += FIXEDW * (charW + fontStride);

    }

}