/* Function: al_hold_bitmap_drawing
*/
void al_hold_bitmap_drawing(bool hold)
{
ALLEGRO_DISPLAY *current_display = al_get_current_display();
if (current_display) {
if (hold && !current_display->cache_enabled) {
/*
* Set the hardware transformation to identity, but keep the bitmap
* transform the same as it was. Relies on the fact that when bitmap
* holding is turned on, al_use_transform does not update the hardware
* transformation.
*/
ALLEGRO_TRANSFORM old, ident;
al_copy_transform(&old, al_get_current_transform());
al_identity_transform(&ident);
al_use_transform(&ident);
current_display->cache_enabled = hold;
al_use_transform(&old);
}
else {
current_display->cache_enabled = hold;
}
if (!hold) {
current_display->vt->flush_vertex_cache(current_display);
/*
* Reset the hardware transform to match the stored transform.
*/
al_use_transform(al_get_current_transform());
}
}
}
void _al_draw_bitmap_region_memory(ALLEGRO_BITMAP *src,
ALLEGRO_COLOR tint,
int sx, int sy, int sw, int sh,
int dx, int dy, int flags)
{
int op, src_mode, dst_mode;
int op_alpha, src_alpha, dst_alpha;
float xtrans, ytrans;
ASSERT(src->parent == NULL);
al_get_separate_blender(&op, &src_mode, &dst_mode, &op_alpha, &src_alpha, &dst_alpha);
if (_AL_DEST_IS_ZERO && _AL_SRC_NOT_MODIFIED_TINT_WHITE &&
_al_transform_is_translation(al_get_current_transform(), &xtrans, &ytrans))
{
_al_draw_bitmap_region_memory_fast(src, sx, sy, sw, sh,
dx + xtrans, dy + ytrans, flags);
return;
}
/* We used to have special cases for translation/scaling only, but the
* general version received much more optimisation and ended up being
* faster.
*/
_al_draw_transformed_scaled_bitmap_memory(src, tint, sx, sy,
sw, sh, dx, dy, sw, sh, flags);
}
static void _draw_tinted_rotated_scaled_bitmap_region(ALLEGRO_BITMAP *bitmap,
ALLEGRO_COLOR tint, float cx, float cy, float angle,
float xscale, float yscale,
float sx, float sy, float sw, float sh, float dx, float dy,
int flags)
{
ALLEGRO_TRANSFORM backup;
ALLEGRO_TRANSFORM t;
ALLEGRO_BITMAP *parent = bitmap;
float const orig_sw = sw;
float const orig_sh = sh;
ASSERT(bitmap);
al_copy_transform(&backup, al_get_current_transform());
al_identity_transform(&t);
if (bitmap->parent) {
parent = bitmap->parent;
sx += bitmap->xofs;
sy += bitmap->yofs;
}
if (sx < 0) {
sw += sx;
al_translate_transform(&t, -sx, 0);
sx = 0;
}
if (sy < 0) {
sh += sy;
al_translate_transform(&t, 0, -sy);
sy = 0;
}
if (sx + sw > parent->w)
sw = parent->w - sx;
if (sy + sh > parent->h)
sh = parent->h - sy;
if (flags & ALLEGRO_FLIP_HORIZONTAL) {
al_scale_transform(&t, -1, 1);
al_translate_transform(&t, orig_sw, 0);
flags &= ~ALLEGRO_FLIP_HORIZONTAL;
}
if (flags & ALLEGRO_FLIP_VERTICAL) {
al_scale_transform(&t, 1, -1);
al_translate_transform(&t, 0, orig_sh);
flags &= ~ALLEGRO_FLIP_VERTICAL;
}
al_translate_transform(&t, -cx, -cy);
al_scale_transform(&t, xscale, yscale);
al_rotate_transform(&t, angle);
al_translate_transform(&t, dx, dy);
al_compose_transform(&t, &backup);
al_use_transform(&t);
_bitmap_drawer(parent, tint, sx, sy, sw, sh, flags);
al_use_transform(&backup);
}
void Renderer::draw()
{
//int dw = al_get_display_width(dpy_);
//int dh = al_get_display_height(dpy_);
ALLEGRO_TRANSFORM trans;
al_identity_transform(&trans);
al_compose_transform(&trans, &camera_transform_);
al_rotate_transform_3d(&trans, 1.0, 0.0, 0.0, rx_look);
setupProjection(&trans);
al_identity_transform(&trans);
al_use_transform(&trans);
getWorldPos(camera_pos_);
al_copy_transform(&cur3d_transform_, al_get_current_transform());
glEnable(GL_DEPTH_TEST);
// Accept fragment if it closer to the camera than the former one
glDepthFunc(GL_LEQUAL);
glEnable(GL_CULL_FACE);
glFrontFace(GL_CCW);
glEnable(GL_ALPHA_TEST);
if(!setShader(SHADER_DEFAULT))
{
NBT_Debug("failed to set default shader");
}
glBindVertexArray(vao_);
resManager_->setAtlasUniforms();
for(auto &it: chunkData_)
{
ChunkData *cd = it.second;
ALLEGRO_TRANSFORM ctrans;
al_identity_transform(&ctrans);
al_translate_transform_3d(&ctrans, cd->x()*15.0, 0.0, cd->z()*15.0);
al_use_transform(&ctrans);
cd->draw(&ctrans);
}
glBindVertexArray(0);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
//drawSelection();
resManager_->unsetAtlasUniforms();
}
void m_draw_tinted_bitmap_identity_view(MBITMAP *bmp, MCOLOR tint, int x, int y, int flags)
{
ALLEGRO_TRANSFORM backup, t;
al_copy_transform(&backup, al_get_current_transform());
al_identity_transform(&t);
al_use_transform(&t);
m_draw_tinted_bitmap(bmp, tint, x, y, flags);
al_use_transform(&backup);
}
static void _al_draw_transformed_scaled_bitmap_memory(
ALLEGRO_BITMAP *src, ALLEGRO_COLOR tint,
int sx, int sy, int sw, int sh, int dx, int dy, int dw, int dh, int flags)
{
ALLEGRO_TRANSFORM local_trans;
al_identity_transform(&local_trans);
al_translate_transform(&local_trans, dx, dy);
al_compose_transform(&local_trans, al_get_current_transform());
_al_draw_transformed_bitmap_memory(src, tint, sx, sy, sw, sh, dw, dh,
&local_trans, flags);
}
void prepareForScreenGrab1()
{
prepareForScreenGrabBackupBitmap = al_get_target_bitmap();
int dx, dy, dw, dh;
get_screen_offset_size(&dx, &dy, &dw, &dh);
m_set_target_bitmap(tmpbuffer);
ALLEGRO_TRANSFORM t;
al_copy_transform(&prepareForScreenGrabBackup, al_get_current_transform());
al_identity_transform(&t);
al_scale_transform(&t, screenScaleX, screenScaleY);
al_translate_transform(&t, dx, dy);
al_use_transform(&t);
preparingForScreenGrab = true;
}
void _al_draw_pixel_memory(ALLEGRO_BITMAP *bitmap, float x, float y,
ALLEGRO_COLOR *color)
{
ALLEGRO_COLOR result;
int ix, iy;
/*
* Probably not worth it to check for identity
*/
al_transform_coordinates(al_get_current_transform(), &x, &y);
ix = (int)x;
iy = (int)y;
_al_blend_memory(color, bitmap, ix, iy, &result);
_al_put_pixel(bitmap, ix, iy, result);
}
void start_text()
{
if (!text_draw_on) {
text_draw_on = true;
int dx, dy, dw, dh;
get_screen_offset_size(&dx, &dy, &dw, &dh);
al_copy_transform(&old_view, al_get_current_transform());
ALLEGRO_TRANSFORM v;
al_identity_transform(&v);
al_scale_transform(&v, textScaleX, textScaleY);
if (al_get_bitmap_width(al_get_target_bitmap()) == al_get_display_width(display) && al_get_bitmap_height(al_get_target_bitmap()) == al_get_display_height(display)) {
al_translate_transform(&v, dx, dy);
}
al_use_transform(&v);
}
}
void m_draw_tinted_scaled_bitmap_identity_view(
MBITMAP *bmp, MCOLOR tint, int sx, int sy, int sw, int sh, int dx, int dy, int dw, int dh, int flags
)
{
ALLEGRO_TRANSFORM backup, t;
al_copy_transform(&backup, al_get_current_transform());
al_identity_transform(&t);
al_use_transform(&t);
al_draw_tinted_scaled_bitmap(
bmp->bitmap,
tint,
sx, sy, sw, sh,
dx, dy, dw, dh,
0
);
al_use_transform(&backup);
}
void draw_blast(Blast *blast) {
ALLEGRO_TRANSFORM transform;
if(al_get_current_transform() == NULL) {
fprintf(stderr, "no target bitmap.");
}
al_identity_transform(&transform);
al_rotate_transform(&transform, 1.58525 + head2theta(blast->heading));
al_translate_transform(&transform, blast->sx, blast->sy);
al_use_transform(&transform);
/* many small lines will eventually create a dashed line */
al_draw_line(0, 0, 0, -10, blast->color, 3.0f);
al_draw_line(0, -15, 0, -25, blast->color, 3.0f);
al_draw_line(0, -30, 0, -40, blast->color, 3.0f);
al_draw_line(0, -45, 0, -60, blast->color, 3.0f);
al_draw_line(0, -65, 0, -80, blast->color, 3.0f);
al_draw_line(0, -85, 0, -100, blast->color, 3.0f);
al_draw_line(0, -105, 0, -120, blast->color, 3.0f);
}
void DrawMenuState(struct Game *game, struct MenuResources *data) {
const ALLEGRO_TRANSFORM *tmp_trans = al_get_current_transform();
ALLEGRO_TRANSFORM trans, cur_trans;
al_copy_transform(&trans, tmp_trans);
al_copy_transform(&cur_trans, tmp_trans);
al_translate_transform(&trans, (al_get_display_width(game->display) / 320.0) * 100, (al_get_display_height(game->display) / 260.0) * ((180-data->screen_pos) - 48));
al_use_transform(&trans);
ALLEGRO_FONT *font = data->font;
char* text = malloc(255*sizeof(char));
struct ALLEGRO_COLOR color;
switch (data->menustate) {
case MENUSTATE_MAIN:
case MENUSTATE_HIDDEN:
if (!data->invisible) {
DrawTextWithShadow(font, data->selected==0 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.5, ALLEGRO_ALIGN_CENTRE, "Start game");
DrawTextWithShadow(font, data->selected==1 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.6, ALLEGRO_ALIGN_CENTRE, "Options");
DrawTextWithShadow(font, data->selected==2 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.7, ALLEGRO_ALIGN_CENTRE, "About");
DrawTextWithShadow(font, data->selected==3 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.8, ALLEGRO_ALIGN_CENTRE, "Exit");
}
break;
case MENUSTATE_OPTIONS:
DrawTextWithShadow(font, data->selected==0 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.5, ALLEGRO_ALIGN_CENTRE, "Video settings");
DrawTextWithShadow(font, data->selected==1 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.6, ALLEGRO_ALIGN_CENTRE, "Audio settings");
DrawTextWithShadow(font, data->selected==3 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.8, ALLEGRO_ALIGN_CENTRE, "Back");
break;
case MENUSTATE_AUDIO:
if (game->config.music) snprintf(text, 255, "Music volume: %d0%%", game->config.music);
else sprintf(text, "Music disabled");
DrawTextWithShadow(font, data->selected==0 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.5, ALLEGRO_ALIGN_CENTRE, text);
if (game->config.fx) snprintf(text, 255, "Effects volume: %d0%%", game->config.fx);
else sprintf(text, "Effects disabled");
DrawTextWithShadow(font, data->selected==1 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.6, ALLEGRO_ALIGN_CENTRE, text);
DrawTextWithShadow(font, data->selected==3 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.8, ALLEGRO_ALIGN_CENTRE, "Back");
break;
case MENUSTATE_ABOUT:
al_use_transform(&cur_trans);
About(game, data);
break;
case MENUSTATE_VIDEO:
if (data->options.fullscreen) {
sprintf(text, "Fullscreen: yes");
color = al_map_rgba(0,0,0,128);
}
else {
sprintf(text, "Fullscreen: no");
color = data->selected==1 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255);
}
DrawTextWithShadow(font, data->selected==0 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.5, ALLEGRO_ALIGN_CENTRE, text);
sprintf(text, "Resolution: %dx", data->options.resolution);
DrawTextWithShadow(font, color, game->viewport.width*0.5, game->viewport.height*0.6, ALLEGRO_ALIGN_CENTRE, text);
DrawTextWithShadow(font, data->selected==3 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.8, ALLEGRO_ALIGN_CENTRE, "Back");
break;
default:
data->selected=0;
DrawTextWithShadow(font, data->selected==0 ? al_map_rgb(128,255,128) : al_map_rgb(255,255,255), game->viewport.width*0.5, game->viewport.height*0.5, ALLEGRO_ALIGN_CENTRE, "Not implemented yet");
break;
}
free(text);
al_use_transform(&cur_trans);
}
static INLINE void transform_vertex(float* x, float* y)
{
al_transform_coordinates(al_get_current_transform(), x, y);
}
bool _al_opengl_set_blender(ALLEGRO_DISPLAY *ogl_disp)
{
int op, src_color, dst_color, op_alpha, src_alpha, dst_alpha;
const int blend_modes[8] = {
GL_ZERO, GL_ONE, GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA,
GL_SRC_COLOR, GL_DST_COLOR, GL_ONE_MINUS_SRC_COLOR,
GL_ONE_MINUS_DST_COLOR
};
const int blend_equations[3] = {
GL_FUNC_ADD, GL_FUNC_SUBTRACT, GL_FUNC_REVERSE_SUBTRACT
};
(void)ogl_disp;
al_get_separate_blender(&op, &src_color, &dst_color,
&op_alpha, &src_alpha, &dst_alpha);
/* glBlendFuncSeparate was only included with OpenGL 1.4 */
/* (And not in OpenGL ES) */
#if !defined ALLEGRO_GP2XWIZ
#if !defined ALLEGRO_IPHONE && !defined ALLEGRO_ANDROID
if (ogl_disp->ogl_extras->ogl_info.version >= _ALLEGRO_OPENGL_VERSION_1_4) {
#else
if (ogl_disp->ogl_extras->ogl_info.version >= _ALLEGRO_OPENGL_VERSION_2_0) {
#endif
glEnable(GL_BLEND);
glBlendFuncSeparate(blend_modes[src_color], blend_modes[dst_color],
blend_modes[src_alpha], blend_modes[dst_alpha]);
if (ogl_disp->ogl_extras->ogl_info.version >= _ALLEGRO_OPENGL_VERSION_2_0) {
glBlendEquationSeparate(
blend_equations[op],
blend_equations[op_alpha]);
}
else {
glBlendEquation(blend_equations[op]);
}
}
else {
if (src_color == src_alpha && dst_color == dst_alpha) {
glEnable(GL_BLEND);
glBlendFunc(blend_modes[src_color], blend_modes[dst_color]);
}
else {
ALLEGRO_ERROR("Blender unsupported with this OpenGL version (%d %d %d %d %d %d)\n",
op, src_color, dst_color, op_alpha, src_alpha, dst_alpha);
return false;
}
}
#else
glEnable(GL_BLEND);
glBlendFunc(blend_modes[src_color], blend_modes[dst_color]);
#endif
return true;
}
/* These functions make drawing calls use shaders or the fixed pipeline
* based on what the user has set up. FIXME: OpenGL only right now.
*/
static void vert_ptr_on(ALLEGRO_DISPLAY *display, int n, GLint t, int stride, void *v)
{
/* Only use this shader stuff with GLES2+ or equivalent */
if (display->flags & ALLEGRO_USE_PROGRAMMABLE_PIPELINE) {
#ifndef ALLEGRO_CFG_NO_GLES2
if (display->ogl_extras->pos_loc >= 0) {
glVertexAttribPointer(display->ogl_extras->pos_loc, n, t, false, stride, v);
glEnableVertexAttribArray(display->ogl_extras->pos_loc);
}
#endif
}
else {
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(n, t, stride, v);
}
}
static void vert_ptr_off(ALLEGRO_DISPLAY *display)
{
if (display->flags & ALLEGRO_USE_PROGRAMMABLE_PIPELINE) {
#ifndef ALLEGRO_CFG_NO_GLES2
if (display->ogl_extras->pos_loc >= 0) {
glDisableVertexAttribArray(display->ogl_extras->pos_loc);
}
#endif
}
else {
glDisableClientState(GL_VERTEX_ARRAY);
}
}
static void color_ptr_on(ALLEGRO_DISPLAY *display, int n, GLint t, int stride, void *v)
{
if (display->flags & ALLEGRO_USE_PROGRAMMABLE_PIPELINE) {
#ifndef ALLEGRO_CFG_NO_GLES2
if (display->ogl_extras->color_loc >= 0) {
glVertexAttribPointer(display->ogl_extras->color_loc, n, t, false, stride, v);
glEnableVertexAttribArray(display->ogl_extras->color_loc);
}
#endif
}
else {
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(n, t, stride, v);
}
}
static void color_ptr_off(ALLEGRO_DISPLAY *display)
{
if (display->flags & ALLEGRO_USE_PROGRAMMABLE_PIPELINE) {
#ifndef ALLEGRO_CFG_NO_GLES2
if (display->ogl_extras->color_loc >= 0) {
glDisableVertexAttribArray(display->ogl_extras->color_loc);
}
#endif
}
else {
glDisableClientState(GL_COLOR_ARRAY);
}
}
static void tex_ptr_on(ALLEGRO_DISPLAY *display, int n, GLint t, int stride, void *v)
{
if (display->flags & ALLEGRO_USE_PROGRAMMABLE_PIPELINE) {
#ifndef ALLEGRO_CFG_NO_GLES2
if (display->ogl_extras->texcoord_loc >= 0) {
glVertexAttribPointer(display->ogl_extras->texcoord_loc, n, t, false, stride, v);
glEnableVertexAttribArray(display->ogl_extras->texcoord_loc);
}
#endif
}
else {
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(n, t, stride, v);
}
}
static void tex_ptr_off(ALLEGRO_DISPLAY *display)
{
if (display->flags & ALLEGRO_USE_PROGRAMMABLE_PIPELINE) {
#ifndef ALLEGRO_CFG_NO_GLES2
if (display->ogl_extras->texcoord_loc >= 0) {
glDisableVertexAttribArray(display->ogl_extras->texcoord_loc);
}
#endif
}
else {
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
}
/* Dummy implementation of clear. */
static void ogl_clear(ALLEGRO_DISPLAY *d, ALLEGRO_COLOR *color)
{
ALLEGRO_DISPLAY *ogl_disp = (void *)d;
ALLEGRO_BITMAP *target = al_get_target_bitmap();
ALLEGRO_BITMAP_EXTRA_OPENGL *ogl_target;
float r, g, b, a;
if (target->parent) target = target->parent;
ogl_target = target->extra;
if ((!ogl_target->is_backbuffer &&
ogl_disp->ogl_extras->opengl_target != target) ||
target->locked) {
_al_clear_memory(color);
return;
}
al_unmap_rgba_f(*color, &r, &g, &b, &a);
/* There's a very nasty bug in Android 2.1 that makes glClear cause
* screen flicker (appears to me it's swapping buffers.) Work around
* by drawing two triangles instead on that OS.
*/
#ifdef ALLEGRO_ANDROID
if (ogl_target->is_backbuffer && _al_android_is_os_2_1()) {
GLfloat v[8] = {
0, d->h,
0, 0,
d->w, d->h,
d->w, 0
};
GLfloat c[16] = {
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a
};
ALLEGRO_TRANSFORM bak1, bak2, t;
al_copy_transform(&bak1, &d->proj_transform);
al_copy_transform(&bak2, al_get_current_transform());
al_identity_transform(&t);
al_ortho_transform(&t, 0, d->w, d->h, 0, -1, 1);
al_set_projection_transform(d, &t);
al_identity_transform(&t);
al_use_transform(&t);
_al_opengl_set_blender(d);
vert_ptr_on(d, 2, GL_FLOAT, 2*sizeof(float), v);
color_ptr_on(d, 4, GL_FLOAT, 4*sizeof(float), c);
if (!(d->flags & ALLEGRO_USE_PROGRAMMABLE_PIPELINE)) {
glDisableClientState(GL_NORMAL_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
glDisable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
vert_ptr_off(d);
color_ptr_off(d);
al_set_projection_transform(d, &bak1);
al_use_transform(&bak2);
return;
}
#endif
glClearColor(r, g, b, a);
glClear(GL_COLOR_BUFFER_BIT);
}
bool _al_opengl_set_blender(ALLEGRO_DISPLAY *ogl_disp)
{
int op, src_color, dst_color, op_alpha, src_alpha, dst_alpha;
ALLEGRO_COLOR const_color;
const int blend_modes[10] = {
GL_ZERO, GL_ONE, GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA,
GL_SRC_COLOR, GL_DST_COLOR, GL_ONE_MINUS_SRC_COLOR,
GL_ONE_MINUS_DST_COLOR,
#if defined(ALLEGRO_CFG_OPENGLES2) || !defined(ALLEGRO_CFG_OPENGLES)
GL_CONSTANT_COLOR, GL_ONE_MINUS_CONSTANT_COLOR
#else
GL_ONE, GL_ONE
#endif
};
const int blend_equations[3] = {
GL_FUNC_ADD, GL_FUNC_SUBTRACT, GL_FUNC_REVERSE_SUBTRACT
};
(void)ogl_disp;
al_get_separate_blender(&op, &src_color, &dst_color,
&op_alpha, &src_alpha, &dst_alpha);
const_color = al_get_blend_color();
/* glBlendFuncSeparate was only included with OpenGL 1.4 */
#if !defined ALLEGRO_CFG_OPENGLES
if (ogl_disp->ogl_extras->ogl_info.version >= _ALLEGRO_OPENGL_VERSION_1_4) {
#else
/* FIXME: At this time (09/2014) there are a lot of Android phones that
* don't support glBlendFuncSeparate even though they claim OpenGL ES 2.0
* support. Rather than not work on 20-25% of phones, we just don't support
* separate blending on Android for now.
*/
#ifdef ALLEGRO_ANDROID
if (false) {
#else
if (ogl_disp->ogl_extras->ogl_info.version >= _ALLEGRO_OPENGL_VERSION_2_0) {
#endif
#endif
glEnable(GL_BLEND);
#if defined(ALLEGRO_CFG_OPENGLES2) || !defined(ALLEGRO_CFG_OPENGLES)
#ifndef ALLEGRO_ANDROID_HACK_X86_64
glBlendColor(const_color.r, const_color.g, const_color.b, const_color.a);
#endif
#endif
glBlendFuncSeparate(blend_modes[src_color], blend_modes[dst_color],
blend_modes[src_alpha], blend_modes[dst_alpha]);
if (ogl_disp->ogl_extras->ogl_info.version >= _ALLEGRO_OPENGL_VERSION_2_0) {
glBlendEquationSeparate(
blend_equations[op],
blend_equations[op_alpha]);
}
else {
glBlendEquation(blend_equations[op]);
}
}
else {
if (src_color == src_alpha && dst_color == dst_alpha) {
glEnable(GL_BLEND);
#if defined(ALLEGRO_CFG_OPENGLES2) || !defined(ALLEGRO_CFG_OPENGLES)
#ifndef ALLEGRO_ANDROID_HACK_X86_64
glBlendColor(const_color.r, const_color.g, const_color.b, const_color.a);
#endif
#endif
glBlendFunc(blend_modes[src_color], blend_modes[dst_color]);
}
else {
ALLEGRO_ERROR("Blender unsupported with this OpenGL version (%d %d %d %d %d %d)\n",
op, src_color, dst_color, op_alpha, src_alpha, dst_alpha);
return false;
}
}
return true;
}
/* These functions make drawing calls use shaders or the fixed pipeline
* based on what the user has set up. FIXME: OpenGL only right now.
*/
static void vert_ptr_on(ALLEGRO_DISPLAY *display, int n, GLint t, int stride, void *v)
{
/* Only use this shader stuff with GLES2+ or equivalent */
if (display->flags & ALLEGRO_PROGRAMMABLE_PIPELINE) {
#ifdef ALLEGRO_CFG_OPENGL_PROGRAMMABLE_PIPELINE
if (display->ogl_extras->varlocs.pos_loc >= 0) {
glVertexAttribPointer(display->ogl_extras->varlocs.pos_loc, n, t, false, stride, v);
glEnableVertexAttribArray(display->ogl_extras->varlocs.pos_loc);
}
#endif
}
else {
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(n, t, stride, v);
}
}
static void vert_ptr_off(ALLEGRO_DISPLAY *display)
{
if (display->flags & ALLEGRO_PROGRAMMABLE_PIPELINE) {
#ifdef ALLEGRO_CFG_OPENGL_PROGRAMMABLE_PIPELINE
if (display->ogl_extras->varlocs.pos_loc >= 0) {
glDisableVertexAttribArray(display->ogl_extras->varlocs.pos_loc);
}
#endif
}
else {
glDisableClientState(GL_VERTEX_ARRAY);
}
}
static void color_ptr_on(ALLEGRO_DISPLAY *display, int n, GLint t, int stride, void *v)
{
if (display->flags & ALLEGRO_PROGRAMMABLE_PIPELINE) {
#ifdef ALLEGRO_CFG_OPENGL_PROGRAMMABLE_PIPELINE
if (display->ogl_extras->varlocs.color_loc >= 0) {
glVertexAttribPointer(display->ogl_extras->varlocs.color_loc, n, t, false, stride, v);
glEnableVertexAttribArray(display->ogl_extras->varlocs.color_loc);
}
#endif
}
else {
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(n, t, stride, v);
}
}
static void color_ptr_off(ALLEGRO_DISPLAY *display)
{
if (display->flags & ALLEGRO_PROGRAMMABLE_PIPELINE) {
#ifdef ALLEGRO_CFG_OPENGL_PROGRAMMABLE_PIPELINE
if (display->ogl_extras->varlocs.color_loc >= 0) {
glDisableVertexAttribArray(display->ogl_extras->varlocs.color_loc);
}
#endif
}
else {
glDisableClientState(GL_COLOR_ARRAY);
}
}
static void tex_ptr_on(ALLEGRO_DISPLAY *display, int n, GLint t, int stride, void *v)
{
if (display->flags & ALLEGRO_PROGRAMMABLE_PIPELINE) {
#ifdef ALLEGRO_CFG_OPENGL_PROGRAMMABLE_PIPELINE
if (display->ogl_extras->varlocs.texcoord_loc >= 0) {
glVertexAttribPointer(display->ogl_extras->varlocs.texcoord_loc, n, t, false, stride, v);
glEnableVertexAttribArray(display->ogl_extras->varlocs.texcoord_loc);
}
#endif
}
else {
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(n, t, stride, v);
}
}
static void tex_ptr_off(ALLEGRO_DISPLAY *display)
{
if (display->flags & ALLEGRO_PROGRAMMABLE_PIPELINE) {
#ifdef ALLEGRO_CFG_OPENGL_PROGRAMMABLE_PIPELINE
if (display->ogl_extras->varlocs.texcoord_loc >= 0) {
glDisableVertexAttribArray(display->ogl_extras->varlocs.texcoord_loc);
}
#endif
}
else {
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
}
/* There's a very nasty bug in Android 2.1 that makes glClear cause
* screen flicker (appears to me it's swapping buffers.) Work around
* by drawing two triangles instead on that OS.
*/
static void ogl_clear_android_2_1_workaround(ALLEGRO_DISPLAY *d,
float r, float g, float b, float a)
{
GLfloat v[8] = {
0, d->h,
0, 0,
d->w, d->h,
d->w, 0
};
GLfloat c[16] = {
r, g, b, a,
r, g, b, a,
r, g, b, a,
r, g, b, a
};
ALLEGRO_TRANSFORM bak1, bak2, t;
al_copy_transform(&bak1, al_get_current_projection_transform());
al_copy_transform(&bak2, al_get_current_transform());
al_identity_transform(&t);
al_orthographic_transform(&t, 0, 0, -1, d->w, d->h, 1);
al_use_projection_transform(&t);
al_identity_transform(&t);
al_use_transform(&t);
_al_opengl_set_blender(d);
vert_ptr_on(d, 2, GL_FLOAT, 2*sizeof(float), v);
color_ptr_on(d, 4, GL_FLOAT, 4*sizeof(float), c);
if (!(d->flags & ALLEGRO_PROGRAMMABLE_PIPELINE)) {
glDisableClientState(GL_NORMAL_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
glDisable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
vert_ptr_off(d);
color_ptr_off(d);
al_use_projection_transform(&bak1);
al_use_transform(&bak2);
}
static void ogl_clear(ALLEGRO_DISPLAY *d, ALLEGRO_COLOR *color)
{
ALLEGRO_DISPLAY *ogl_disp = (void *)d;
ALLEGRO_BITMAP *target = al_get_target_bitmap();
ALLEGRO_BITMAP_EXTRA_OPENGL *ogl_target;
float r, g, b, a;
if (target->parent)
target = target->parent;
ogl_target = target->extra;
if ((!ogl_target->is_backbuffer &&
ogl_disp->ogl_extras->opengl_target != target)
|| target->locked)
{
_al_clear_bitmap_by_locking(target, color);
return;
}
al_unmap_rgba_f(*color, &r, &g, &b, &a);
if (ogl_target->is_backbuffer && IS_ANDROID_AND(_al_android_is_os_2_1())) {
ogl_clear_android_2_1_workaround(d, r, g, b, a);
return;
}
glClearColor(r, g, b, a);
glClear(GL_COLOR_BUFFER_BIT);
}
// Render function.
// (this used to be set in io.RenderDrawListsFn and called by ImGui::Render(), but you can now call this directly from your main loop)
void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
{
// Backup Allegro state that will be modified
ALLEGRO_TRANSFORM last_transform = *al_get_current_transform();
ALLEGRO_TRANSFORM last_projection_transform = *al_get_current_projection_transform();
int last_clip_x, last_clip_y, last_clip_w, last_clip_h;
al_get_clipping_rectangle(&last_clip_x, &last_clip_y, &last_clip_w, &last_clip_h);
int last_blender_op, last_blender_src, last_blender_dst;
al_get_blender(&last_blender_op, &last_blender_src, &last_blender_dst);
// Setup render state
al_set_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA);
// Setup orthographic projection matrix
// Our visible imgui space lies from draw_data->DisplayPos (top left) to draw_data->DisplayPos+data_data->DisplaySize (bottom right).
{
float L = draw_data->DisplayPos.x;
float R = draw_data->DisplayPos.x + draw_data->DisplaySize.x;
float T = draw_data->DisplayPos.y;
float B = draw_data->DisplayPos.y + draw_data->DisplaySize.y;
ALLEGRO_TRANSFORM transform;
al_identity_transform(&transform);
al_use_transform(&transform);
al_orthographic_transform(&transform, L, T, 1.0f, R, B, -1.0f);
al_use_projection_transform(&transform);
}
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
// Allegro's implementation of al_draw_indexed_prim() for DX9 is completely broken. Unindex our buffers ourselves.
// FIXME-OPT: Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 float as well..
static ImVector<ImDrawVertAllegro> vertices;
vertices.resize(cmd_list->IdxBuffer.Size);
for (int i = 0; i < cmd_list->IdxBuffer.Size; i++)
{
const ImDrawVert* src_v = &cmd_list->VtxBuffer[cmd_list->IdxBuffer[i]];
ImDrawVertAllegro* dst_v = &vertices[i];
dst_v->pos = src_v->pos;
dst_v->uv = src_v->uv;
unsigned char* c = (unsigned char*)&src_v->col;
dst_v->col = al_map_rgba(c[0], c[1], c[2], c[3]);
}
const int* indices = NULL;
if (sizeof(ImDrawIdx) == 2)
{
// FIXME-OPT: Unfortunately Allegro doesn't support 16-bit indices.. You can '#define ImDrawIdx int' in imconfig.h to request Dear ImGui to output 32-bit indices.
// Otherwise, we convert them from 16-bit to 32-bit at runtime here, which works perfectly but is a little wasteful.
static ImVector<int> indices_converted;
indices_converted.resize(cmd_list->IdxBuffer.Size);
for (int i = 0; i < cmd_list->IdxBuffer.Size; ++i)
indices_converted[i] = (int)cmd_list->IdxBuffer.Data[i];
indices = indices_converted.Data;
}
else if (sizeof(ImDrawIdx) == 4)
{
indices = (const int*)cmd_list->IdxBuffer.Data;
}
// Render command lists
int idx_offset = 0;
ImVec2 clip_off = draw_data->DisplayPos;
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.Size; cmd_i++)
{
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback)
{
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->TextureId;
al_set_clipping_rectangle(pcmd->ClipRect.x - clip_off.x, pcmd->ClipRect.y - clip_off.y, pcmd->ClipRect.z - pcmd->ClipRect.x, pcmd->ClipRect.w - pcmd->ClipRect.y);
al_draw_prim(&vertices[0], g_VertexDecl, texture, idx_offset, idx_offset + pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
}
idx_offset += pcmd->ElemCount;
}
}
// Restore modified Allegro state
al_set_blender(last_blender_op, last_blender_src, last_blender_dst);
al_set_clipping_rectangle(last_clip_x, last_clip_y, last_clip_w, last_clip_h);
al_use_transform(&last_transform);
al_use_projection_transform(&last_projection_transform);
}
VALUE rbal_get_current_transform(VALUE r_) {
ALLEGRO_TRANSFORM * trans = (ALLEGRO_TRANSFORM *) al_get_current_transform();
return rbal_transform_wrap(trans, RBAL_NO_GC);
}
