void DrawRect(int x, int y, int width, int height, uint8 r, uint8 g, uint8 b)
{
int right = x + width;
int bottom = y + height;
if (x < 0)
x = 0;
if (y < 0)
y = 0;
if (right > (int32)s3eSurfaceGetInt(S3E_SURFACE_WIDTH))
right = s3eSurfaceGetInt(S3E_SURFACE_WIDTH);
if (bottom > (int32)s3eSurfaceGetInt(S3E_SURFACE_HEIGHT))
bottom = s3eSurfaceGetInt(S3E_SURFACE_HEIGHT);
// Draw the text
IwGxSetScreenSpaceSlot(0);
CIwMaterial *fadeMat = IW_GX_ALLOC_MATERIAL();
fadeMat->SetAlphaMode(CIwMaterial::NONE);
fadeMat->SetShadeMode(CIwMaterial::SHADE_FLAT);
IwGxSetMaterial(fadeMat);
CIwColour* cols = IW_GX_ALLOC(CIwColour, 4);
for (int i = 0; i < 4; i++)
cols[i].Set(r, g, b);
CIwSVec2 xy(x, y);
CIwSVec2 wh(width, height);
IwGxDrawRectScreenSpace(&xy, &wh, cols);
}
// This is the main rendering function that you have to implement and provide to ImGui (via setting up 'RenderDrawListsFn' in the ImGuiIO structure)
void ImGui_Marmalade_RenderDrawLists(ImDrawData* draw_data)
{
// Handle cases of screen coordinates != from framebuffer coordinates (e.g. retina displays)
ImGuiIO& io = ImGui::GetIO();
draw_data->ScaleClipRects(io.DisplayFramebufferScale);
// Render command lists
for(int n = 0; n < draw_data->CmdListsCount; n++)
{
const ImDrawList* cmd_list = draw_data->CmdLists[n];
const unsigned char* vtx_buffer = (const unsigned char*)&cmd_list->VtxBuffer.front();
const ImDrawIdx* idx_buffer = &cmd_list->IdxBuffer.front();
int nVert = cmd_list->VtxBuffer.size();
CIwFVec2* pVertStream = IW_GX_ALLOC(CIwFVec2, nVert);
CIwFVec2* pUVStream = IW_GX_ALLOC(CIwFVec2, nVert);
CIwColour* pColStream = IW_GX_ALLOC(CIwColour, nVert);
for( int i=0; i < nVert; i++ )
{
// TODO: optimize multiplication on gpu using vertex shader
pVertStream[i].x = cmd_list->VtxBuffer[i].pos.x * g_scale.x;
pVertStream[i].y = cmd_list->VtxBuffer[i].pos.y * g_scale.y;
pUVStream[i].x = cmd_list->VtxBuffer[i].uv.x;
pUVStream[i].y = cmd_list->VtxBuffer[i].uv.y;
pColStream[i] = cmd_list->VtxBuffer[i].col;
}
IwGxSetVertStreamScreenSpace(pVertStream, nVert);
IwGxSetUVStream(pUVStream);
IwGxSetColStream(pColStream, nVert);
IwGxSetNormStream(0);
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
{
CIwMaterial* pCurrentMaterial = IW_GX_ALLOC_MATERIAL();
pCurrentMaterial->SetShadeMode(CIwMaterial::SHADE_FLAT);
pCurrentMaterial->SetCullMode(CIwMaterial::CULL_NONE);
pCurrentMaterial->SetFiltering(false);
pCurrentMaterial->SetAlphaMode(CIwMaterial::ALPHA_BLEND);
pCurrentMaterial->SetDepthWriteMode(CIwMaterial::DEPTH_WRITE_NORMAL);
pCurrentMaterial->SetAlphaTestMode(CIwMaterial::ALPHATEST_DISABLED);
pCurrentMaterial->SetTexture((CIwTexture*)pcmd->TextureId);
IwGxSetMaterial(pCurrentMaterial);
IwGxDrawPrims(IW_GX_TRI_LIST, (uint16*)idx_buffer, pcmd->ElemCount);
}
idx_buffer += pcmd->ElemCount;
}
IwGxFlush();
}
// TODO: restore modified state (i.e. mvp matrix)
}
