forked from bartvdbraak/blender
Add the possibility to set a 4x4 matrix to be used on blf.
This option allow the user to set a 4x4 matrix to be multiplied before draw the text, for example: double *m; /* Get the matrix or build it! */ BLF_matrix(m); BLF_enable(BLF_MATRIX); /* set color, size, etc and draw! */ BLF_disable(BLF_MATRIX); You don't need the last line (disable), but remember that if you use the font to draw in any other place, the matrix will be used!. The GL code is: glPushMatrix(); glMultMatrixd(m); glTranslatef(); glScalef(); glRotatef(); glPopMatrix(); Let's Dalai test this!!! :D
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@ -49,6 +49,20 @@ void BLF_aspect(int fontid, float aspect);
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void BLF_position(int fontid, float x, float y, float z);
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void BLF_size(int fontid, int size, int dpi);
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/* Set a 4x4 matrix to be multiplied before draw the text.
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* Remember that you need call BLF_enable(BLF_MATRIX)
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* to enable this.
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*
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* The order of the matrix is like GL:
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| m[0] m[4] m[8] m[12] |
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| m[1] m[5] m[9] m[13] |
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| m[2] m[6] m[10] m[14] |
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| m[3] m[7] m[11] m[15] |
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*/
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void BLF_matrix(int fontid, double *m);
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/* Draw the string using the default font, size and dpi. */
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void BLF_draw_default(float x, float y, float z, const char *str, size_t len);
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void BLF_draw_default_ascii(float x, float y, float z, const char *str, size_t len);
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@ -180,6 +194,7 @@ void BLF_dir_free(char **dirs, int count);
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#define BLF_CLIPPING (1<<1)
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#define BLF_SHADOW (1<<2)
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#define BLF_KERNING_DEFAULT (1<<3)
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#define BLF_MATRIX (1<<4)
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// XXX, bad design
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extern int blf_mono_font;
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@ -330,6 +330,18 @@ void BLF_aspect(int fontid, float aspect)
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font->aspect= aspect;
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}
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void BLF_matrix(int fontid, double *m)
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{
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FontBLF *font;
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int i;
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font= BLF_get(fontid);
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if (font) {
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for (i= 0; i < 16; i++)
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font->m[i]= m[i];
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}
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}
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void BLF_position(int fontid, float x, float y, float z)
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{
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FontBLF *font;
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@ -435,6 +447,10 @@ static void blf_draw__start(FontBLF *font)
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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glPushMatrix();
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if (font->flags & BLF_MATRIX)
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glMultMatrixd((GLdouble *)&font->m);
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glTranslatef(font->pos[0], font->pos[1], font->pos[2]);
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glScalef(font->aspect, font->aspect, 1.0);
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@ -493,11 +493,16 @@ void blf_font_free(FontBLF *font)
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static void blf_font_fill(FontBLF *font)
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{
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int i;
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font->aspect= 1.0f;
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font->pos[0]= 0.0f;
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font->pos[1]= 0.0f;
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font->angle= 0.0f;
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unit_m4(font->mat);
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for (i= 0; i < 16; i++)
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font->m[i]= 0;
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font->clip_rec.xmin= 0.0f;
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font->clip_rec.xmax= 0.0f;
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font->clip_rec.ymin= 0.0f;
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@ -154,8 +154,10 @@ typedef struct FontBLF {
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/* shadow color. */
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float shadow_col[4];
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/* this is the matrix that we load before rotate/scale/translate. */
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float mat[4][4];
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/* Multiplied this matrix with the current one before
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* draw the text! see blf_draw__start.
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*/
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double m[16];
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/* clipping rectangle. */
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rctf clip_rec;
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