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) }