static void gl_render_msg(gl_t *gl, const char *msg)
{
if (!gl->font)
return;
GLfloat font_vertex[8];
GLfloat font_vertex_dark[8];
GLfloat font_tex_coords[8];
// Deactivate custom shaders. Enable the font texture.
gl_shader_use(0);
set_viewport(gl, gl->win_width, gl->win_height, false, false);
glBindTexture(GL_TEXTURE_2D, gl->font_tex);
glTexCoordPointer(2, GL_FLOAT, 0, font_tex_coords);
// Need blending.
// Using fixed function pipeline here since we cannot guarantee presence of shaders (would be kinda overkill anyways).
glEnable(GL_BLEND);
struct font_output_list out;
// If we get the same message, there's obviously no need to render fonts again ...
if (strcmp(gl->font_last_msg, msg) != 0)
{
font_renderer_msg(gl->font, msg, &out);
struct font_output *head = out.head;
struct font_rect geom;
calculate_msg_geometry(head, &geom);
adjust_power_of_two(gl, &geom);
blit_fonts(gl, head, &geom);
font_renderer_free_output(&out);
strlcpy(gl->font_last_msg, msg, sizeof(gl->font_last_msg));
gl->font_last_width = geom.width;
gl->font_last_height = geom.height;
}
calculate_font_coords(gl, font_vertex, font_vertex_dark, font_tex_coords);
glVertexPointer(2, GL_FLOAT, 0, font_vertex_dark);
glColorPointer(4, GL_FLOAT, 0, gl->font_color_dark);
glDrawArrays(GL_QUADS, 0, 4);
glVertexPointer(2, GL_FLOAT, 0, font_vertex);
glColorPointer(4, GL_FLOAT, 0, gl->font_color);
glDrawArrays(GL_QUADS, 0, 4);
// Go back to old rendering path.
glTexCoordPointer(2, GL_FLOAT, 0, gl->tex_coords);
glVertexPointer(2, GL_FLOAT, 0, vertexes_flipped);
glColorPointer(4, GL_FLOAT, 0, white_color);
glBindTexture(GL_TEXTURE_2D, gl->texture[gl->tex_index]);
glDisable(GL_BLEND);
set_projection(gl, true);
}
static void rpi_render_message(rpi_t *rpi, const char *msg)
{
free(rpi->mLastMsg);
rpi->mLastMsg = strdup(msg);
if (rpi->mMsgLength)
{
while (--rpi->mMsgLength)
vgClearGlyph(rpi->mFont, rpi->mMsgLength);
vgClearGlyph(rpi->mFont, 0);
}
struct font_output_list out;
font_renderer_msg(rpi->mFontRenderer, msg, &out);
struct font_output *head = out.head;
while (head)
{
if (rpi->mMsgLength >= 1024)
break;
VGfloat origin[2], escapement[2];
VGImage img;
escapement[0] = head->advance_x;
escapement[1] = head->advance_y;
origin[0] = -head->char_off_x;
origin[1] = -head->char_off_y;
img = vgCreateImage(VG_A_8, head->width, head->height, VG_IMAGE_QUALITY_NONANTIALIASED);
// flip it
for (unsigned i = 0; i < head->height; i++)
vgImageSubData(img, head->output + head->pitch * i, head->pitch, VG_A_8, 0, head->height - i - 1, head->width, 1);
vgSetGlyphToImage(rpi->mFont, rpi->mMsgLength, img, origin, escapement);
vgDestroyImage(img);
rpi->mMsgLength++;
head = head->next;
}
font_renderer_free_output(&out);
for (unsigned i = 0; i < rpi->mMsgLength; i++)
rpi->mGlyphIndices[i] = i;
}
