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Allegro 5 example: converted for indexed rendering.

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This commit is contained in:
ocornut 2015-07-08 12:55:40 -06:00
parent 60dd221737
commit 2f574ef952
1 changed files with 21 additions and 15 deletions
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36
examples/allegro5_example/imgui_impl_a5.cpp
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@ -29,22 +29,22 @@ struct ImDrawVertAllegro
ALLEGRO_COLOR col; ALLEGRO_COLOR col;
}; };
static void ImGui_ImplA5_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count) static void ImGui_ImplA5_RenderDrawLists(ImDrawData* draw_data)
{ {
int op, src, dst; int op, src, dst;
al_get_blender(&op, &src, &dst); al_get_blender(&op, &src, &dst);
al_set_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA); al_set_blender(ALLEGRO_ADD, ALLEGRO_ALPHA, ALLEGRO_INVERSE_ALPHA);
for (int n = 0; n < cmd_lists_count; n++) for (int n = 0; n < draw_data->CmdListsCount; n++)
{ {
const ImDrawList* cmd_list = cmd_lists[n]; const ImDrawList* cmd_list = draw_data->CmdLists[n];
// FIXME-OPT: Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats // FIXME-OPT: Unfortunately Allegro doesn't support 32-bits packed colors so we have to convert them to 4 floats
static ImVector<ImDrawVertAllegro> vertices; static ImVector<ImDrawVertAllegro> vertices;
vertices.resize(cmd_list->vtx_buffer.size()); vertices.resize(cmd_list->VtxBuffer.size());
for (int i = 0; i < cmd_list->vtx_buffer.size(); ++i) for (int i = 0; i < cmd_list->VtxBuffer.size(); ++i)
{ {
const ImDrawVert &dv = cmd_list->vtx_buffer[i]; const ImDrawVert &dv = cmd_list->VtxBuffer[i];
ImDrawVertAllegro v; ImDrawVertAllegro v;
v.pos = dv.pos; v.pos = dv.pos;
v.uv = dv.uv; v.uv = dv.uv;
@ -53,21 +53,27 @@ static void ImGui_ImplA5_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_l
vertices[i] = v; vertices[i] = v;
} }
int vtx_offset = 0; // FIXME-OPT: Unfortunately Allegro doesn't support 16-bit vertices
for (int cmd_i = 0; cmd_i < cmd_list->commands.size(); cmd_i++) static ImVector<int> indices;
indices.resize(cmd_list->IdxBuffer.size());
for (int i = 0; i < cmd_list->IdxBuffer.size(); ++i)
indices[i] = (int)cmd_list->IdxBuffer.Data[i];
int idx_offset = 0;
for (int cmd_i = 0; cmd_i < cmd_list->CmdBuffer.size(); cmd_i++)
{ {
const ImDrawCmd* pcmd = &cmd_list->commands[cmd_i]; const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->user_callback) if (pcmd->UserCallback)
{ {
pcmd->user_callback(cmd_list, pcmd); pcmd->UserCallback(cmd_list, pcmd);
} }
else else
{ {
ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->texture_id; ALLEGRO_BITMAP* texture = (ALLEGRO_BITMAP*)pcmd->TextureId;
al_set_clipping_rectangle(pcmd->clip_rect.x, pcmd->clip_rect.y, pcmd->clip_rect.z-pcmd->clip_rect.x, pcmd->clip_rect.w-pcmd->clip_rect.y); al_set_clipping_rectangle(pcmd->ClipRect.x, pcmd->ClipRect.y, pcmd->ClipRect.z-pcmd->ClipRect.x, pcmd->ClipRect.w-pcmd->ClipRect.y);
al_draw_prim(&vertices[0], g_VertexDecl, texture, vtx_offset, vtx_offset+pcmd->vtx_count, ALLEGRO_PRIM_TRIANGLE_LIST); al_draw_indexed_prim(&vertices[0], g_VertexDecl, texture, &indices[idx_offset], pcmd->ElemCount, ALLEGRO_PRIM_TRIANGLE_LIST);
} }
vtx_offset += pcmd->vtx_count; idx_offset += pcmd->ElemCount;
} }
} }