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Indexed rendering. Not in main branch because breaks rendering code too much. Will merge in trunk along with more major graphics changes lat

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This commit is contained in:
ocornut
2015-04-09 21:05:35 +01:00
parent 500a8a0e02
commit 1746b04065
6 changed files with 210 additions and 125 deletions
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29
examples/directx9_example/imgui_impl_dx9.cpp
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@ -15,7 +15,9 @@ static INT64 g_Time = 0;
static INT64 g_TicksPerSecond = 0;
static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL;
static LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL;
static int VERTEX_BUFFER_SIZE = 30000; // TODO: Make vertex buffer smaller and grow dynamically as needed.
static LPDIRECT3DINDEXBUFFER9 g_pIB = NULL;
static int VERTEX_BUFFER_SIZE = 30000; // TODO: Make buffers smaller and grow dynamically as needed.
static int INDEX_BUFFER_SIZE = 30000; // TODO: Make buffers smaller and grow dynamically as needed.
struct CUSTOMVERTEX
{
@ -31,15 +33,22 @@ struct CUSTOMVERTEX
static void ImGui_ImplDX9_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_lists_count)
{
size_t total_vtx_count = 0;
size_t total_idx_count = 0;
for (int n = 0; n < cmd_lists_count; n++)
{
total_vtx_count += cmd_lists[n]->vtx_buffer.size();
total_idx_count += cmd_lists[n]->idx_buffer.size();
}
if (total_vtx_count == 0)
return;
// Copy and convert all vertices into a single contiguous buffer
CUSTOMVERTEX* vtx_dst;
ImDrawIdx* idx_dst;
if (g_pVB->Lock(0, (UINT)total_vtx_count, (void**)&vtx_dst, D3DLOCK_DISCARD) < 0)
return;
if (g_pIB->Lock(0, (UINT)total_idx_count, (void**)&idx_dst, D3DLOCK_DISCARD) < 0)
return;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
@ -55,9 +64,13 @@ static void ImGui_ImplDX9_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_
vtx_dst++;
vtx_src++;
}
memcpy(idx_dst, &cmd_list->idx_buffer[0], cmd_list->idx_buffer.size() * sizeof(ImDrawIdx));
idx_dst += cmd_list->idx_buffer.size();
}
g_pVB->Unlock();
g_pIB->Unlock();
g_pd3dDevice->SetStreamSource( 0, g_pVB, 0, sizeof( CUSTOMVERTEX ) );
g_pd3dDevice->SetIndices( g_pIB );
g_pd3dDevice->SetFVF( D3DFVF_CUSTOMVERTEX );
// Setup render state: fixed-pipeline, alpha-blending, no face culling, no depth testing
@ -90,6 +103,7 @@ static void ImGui_ImplDX9_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_
// Render command lists
int vtx_offset = 0;
int idx_offset = 0;
for (int n = 0; n < cmd_lists_count; n++)
{
const ImDrawList* cmd_list = cmd_lists[n];
@ -105,10 +119,11 @@ static void ImGui_ImplDX9_RenderDrawLists(ImDrawList** const cmd_lists, int cmd_
const RECT r = { (LONG)pcmd->clip_rect.x, (LONG)pcmd->clip_rect.y, (LONG)pcmd->clip_rect.z, (LONG)pcmd->clip_rect.w };
g_pd3dDevice->SetTexture( 0, (LPDIRECT3DTEXTURE9)pcmd->texture_id );
g_pd3dDevice->SetScissorRect(&r);
g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, vtx_offset, pcmd->vtx_count/3);
g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, vtx_offset, 0, cmd_list->vtx_buffer.size(), idx_offset, pcmd->idx_count/3);
}
vtx_offset += pcmd->vtx_count;
idx_offset += pcmd->idx_count;
}
vtx_offset += cmd_list->vtx_buffer.size();
}
}
@ -234,6 +249,9 @@ bool ImGui_ImplDX9_CreateDeviceObjects()
if (g_pd3dDevice->CreateVertexBuffer(VERTEX_BUFFER_SIZE * sizeof(CUSTOMVERTEX), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_pVB, NULL) < 0)
return false;
if (g_pd3dDevice->CreateIndexBuffer(INDEX_BUFFER_SIZE * sizeof(ImDrawIdx), D3DUSAGE_DYNAMIC | D3DUSAGE_WRITEONLY, D3DFMT_INDEX16, D3DPOOL_DEFAULT, &g_pIB, NULL) < 0)
return false;
ImGui_ImplDX9_CreateFontsTexture();
return true;
}
@ -247,6 +265,11 @@ void ImGui_ImplDX9_InvalidateDeviceObjects()
g_pVB->Release();
g_pVB = NULL;
}
if (g_pIB)
{
g_pIB->Release();
g_pIB = NULL;
}
if (LPDIRECT3DTEXTURE9 tex = (LPDIRECT3DTEXTURE9)ImGui::GetIO().Fonts->TexID)
{
tex->Release();