Drezil/imgui
1
0
Fork 0
mirror of https://github.com/Drezil/imgui.git synced 2025-07-07 13:35:49 +02:00
Code Issues Packages Projects Releases Wiki Activity

ImDrawCallback_ResetRenderState, Examples: Added support for reset render state callback. (#2037, #1639, #2452)

Browse Source
This commit is contained in:
omar
2019-04-30 22:15:59 +02:00
parent 3fbc0b7a9e
commit 5c1cd5c8c7
10 changed files with 394 additions and 294 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
examples/imgui_impl_allegro5.cpp
View File

@ -60,6 +60,26 @@ struct ImDrawVertAllegro
ALLEGRO_COLOR col;
};
static void ImGui_ImplAllegro5_SetupRenderState(ImDrawData* draw_data)
{
// Setup blending
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);
}
}
// 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)
@ -76,23 +96,10 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
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);
}
// Setup desired render state
ImGui_ImplAllegro5_SetupRenderState(draw_data);
// Render command lists
for (int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
@ -135,10 +142,16 @@ void ImGui_ImplAllegro5_RenderDrawData(ImDrawData* draw_data)
const ImDrawCmd* pcmd = &cmd_list->CmdBuffer[cmd_i];
if (pcmd->UserCallback)
{
pcmd->UserCallback(cmd_list, pcmd);
// User callback, registered via ImDrawList::AddCallback()
// (ImDrawCallback_ResetRenderState is a special callback value used by the user to request the renderer to reset render state.)
if (pcmd->UserCallback == ImDrawCallback_ResetRenderState)
ImGui_ImplAllegro5_SetupRenderState(draw_data);
else
pcmd->UserCallback(cmd_list, pcmd);
}
else
{
// Draw
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);